CN213061310U

CN213061310U - Power-off device of sewing machine

Info

Publication number: CN213061310U
Application number: CN202021472684.2U
Authority: CN
Inventors: 卓瑞荣
Original assignee: XINGRUI SEWING MACHINE (JIAXING) CO Ltd
Current assignee: XINGRUI SEWING MACHINE (JIAXING) CO Ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-04-27
Anticipated expiration: 2030-07-23

Abstract

A kind of sewing machine power cut-off device, include a body, one locate the broken string on this body and detect the trigger seat, at least a broken string and detect the hook, a bearing block providing setting of this broken string to detect the hook, should break and detect the hook and have one and receive the tension of a yarn and keep away from the first state of this broken string and detect the trigger seat, and one is contacted the second state of this broken string and detect the trigger seat briefly when the tension of this yarn disappears, make a sewing machine controlling device receive a power cut-off signal when this broken string detects the trigger seat and should break and detect the hook contact. This novel be equipped with an elastic component between this broken string detects trigger seat and this broken string and detects the couple, this elastic component is stable this broken string when detecting the couple and change to this second state by this first state in this broken string and is detected a movement track of couple.

Description

Power-off device of sewing machine

Technical Field

The utility model relates to a sewing machine outage device indicates especially an outage device who utilizes elastic component to stabilize broken string and detect couple movement track.

Background

The sewing machine is easy to break during sewing operation, and when the sewing machine breaks, if the inside of the machine table continuously operates, related sewing components are possibly in abnormal working states, parts are easy to damage, and meanwhile, due to yarn breakage, the sewing process is incomplete, and defective products are easy to generate. In order to avoid the above problems, a conventional sewing machine is often provided with a power-off device, such as that disclosed in taiwan patent TW 397065.

Further, according to the disclosure of the patent specification, the power cut-off device includes at least one thread pulling rod hung on the sewing thread and a plurality of conductive strips arranged opposite to the thread pulling rod. When the sewing thread is broken and the thread pulling rod is not supported any more, the thread pulling rod descends to enable the conductive end of the thread pulling rod to contact the conductive sheets, and the thread pulling rod is electrified and short-circuited with the conductive sheets to cut off the power supply of the sewing machine. However, the displacement path of the pull rod may be deviated when the pull rod is lowered, and the pull rod may impact the conductive sheets many times after long-term use, which may cause the conductive sheets to be deviated, and further may cause the pull rod not to contact the conductive sheets, so that the power-off device may not be operated reliably.

SUMMERY OF THE UTILITY MODEL

The main purpose of the present invention is to solve the conventional problem that the falling path of the wire-pulling rod is not controlled so that the conductive sheet is easily bumped and deviated.

In order to achieve the above object, the present invention provides a power-off device for a sewing machine, the power-off device for a sewing machine is disposed on a yarn transmission path of the sewing machine, the power-off device for a sewing machine comprises a body, a broken yarn detection trigger seat disposed on the body, at least one broken yarn detection hook, and a support block disposed on the body and providing a setting of the broken yarn detection hook, wherein the broken yarn detection hook has a first state located on the yarn transmission path and kept away from the broken yarn detection trigger seat under a tension action of a yarn, and a second state momentarily contacting the broken yarn detection trigger seat when the tension of the yarn disappears, and the broken yarn detection trigger seat contacts the broken yarn detection hook to enable a sewing machine control device to receive a power-off signal. Furthermore, the power-off device of the sewing machine comprises at least one elastic piece, and the elastic piece is arranged between the broken thread detection hook and the broken thread detection trigger seat and stabilizes a motion track of the broken thread detection hook when the broken thread detection hook is switched from the first state to the second state.

In one embodiment, the disconnection detection trigger base comprises a bearing part arranged on the body and an electrical part which corresponds to the bearing part and generates the disconnection signal when the bearing part is in short contact with the disconnection detection hook, the bearing part is provided with a plurality of assembly holes which are respectively arranged corresponding to one of the elastic pieces, and the electrical part is provided with a plurality of conductive terminals which are respectively corresponding to one of the assembly holes.

In one embodiment, the conductive terminals are respectively disposed on two rows, and the conductive terminals on the same row are formed by a metal plate.

In one embodiment, the elastic member has a diameter-reducing section penetrated by the assembling hole and an expanding section connected with the diameter-reducing section and assembled on one side of the disconnection detecting trigger seat.

In one embodiment, the hook for detecting broken thread comprises a thread hanging part for hanging the thread and at least one triggering part connected with the thread hanging part and extending towards the elastic part, and when the hook for detecting broken thread is switched from the first state to the second state, one end of the hook for detecting broken thread on the triggering part temporarily contacts the trigger seat for detecting broken thread.

In one embodiment, the triggering portion is a linear structure, and the wire hanging portion has two turning line segments respectively connected to one of the triggering portions and an arc-shaped line segment disposed between the two turning line segments.

In one embodiment, the wire breakage detecting hook is provided with at least one weight facing the wire breakage detecting trigger seat, and one side of the weight facing the wire breakage detecting trigger seat is of a conical structure.

In one embodiment, the support block has at least one through hole through which the disconnection detecting hook is inserted.

In one embodiment, the body has a plurality of threading holes respectively located on the yarn transmission path.

In one embodiment, the body has a plurality of yarn guiding members respectively corresponding to one of the threading holes.

In one embodiment, the body has two oppositely disposed retaining walls and a bottom plate disposed between the retaining walls for providing the thread breakage detection trigger seat, and each retaining wall has the threading holes located on the yarn transmission path.

Through the implementation of the present invention, compared with the conventional method, the method has the following characteristics: this novel seeing through this elastic component sets up in this broken string detects couple and this broken string detects trigger seat for this elastic component can stabilize this movement track that this outage detected the couple when this outage detects the couple and changes to this second state by this first state, reduces the unable condition of actuating really of this outage device.

Drawings

Fig. 1 is a schematic view (one) of the arrangement position of the power-off device of the sewing machine according to the embodiment of the present invention.

Fig. 2 is a schematic view (ii) of the installation position of the power-off device of the sewing machine according to the present embodiment.

Fig. 3 is a schematic perspective view of a power-off device of the sewing machine according to the embodiment of the present invention.

FIG. 4 is an exploded view of the power cut-off device of the sewing machine according to the embodiment of the present invention.

FIG. 5 is a schematic view of a first state of the power-off device of the sewing machine according to the embodiment of the present invention.

FIG. 6 is a schematic view of a second state of the power-off device of the sewing machine according to the present invention.

Wherein, 100, a sewing machine; 101, a yarn transfer path; 10, a power-off device; 11, a body; 111, retaining wall; 112, a bottom plate; 113, threading holes; 114, a yarn guide; 115, a mounting member; 12, detecting a broken wire to trigger a seat; 121, a carrier portion; 122, an electrical part; 123, an assembly hole; 124, a metal plate; 13, detecting a hook by breaking the wire; 131, motion trail; 132, a wire hanging part; 133, a trigger part; 134, terminal end; 135, turning the line segment; 136, arc line segment; 137, a weighting block; 138, a tapered configuration; 139, assembling parts; 14, bearing blocks; 141, a through hole; 15, an elastic member; 151, a reducing section; 152, a diameter expansion section; 20, a horn; 30, a yarn tightness adjusting device; 40, swinging the pulling assembly; 200, yarns.

Detailed Description

The detailed description and technical contents of the present invention will now be described with reference to the drawings as follows:

referring to fig. 1 to 4, the present invention provides a power cut-off device 10 for a sewing machine, the power cut-off device 10 is disposed on a yarn transmission path 101 of the sewing machine 100, the yarn transmission path 101 refers to a path for a yarn 200 to be transported from a yarn feeding end (not shown) of the sewing machine 100 to an arm 20 of the sewing machine 100, for example, the yarn transmission path 101 can respectively pass through the power cut-off device 10, a yarn tightness adjusting device 30 and a swinging pulling assembly 40. In addition, the yarn transmission path 101 is illustrated by a transmission path of the yarn 200 between the sewing machine power-off device 10, the yarn tightness adjusting device 20 and the swinging pulling assembly 30, and the yarn transmission path 101 can be understood and implemented by those skilled in the art based on the foregoing description, and will not be described herein again.

Referring to fig. 3 to 6, the sewing machine power-off device 10 includes a main body 11, a thread breakage detecting trigger seat 12 disposed on the main body 11, at least one thread breakage detecting hook 13, and a support block 14 disposed on the main body 11 and providing the thread breakage detecting hook 13 with an arrangement. The wire breakage detecting trigger 12 is disposed on one side of the body 11, for example, the wire breakage detecting trigger 12 may be disposed at the bottom of the body 11. In addition, the hook 13 is disposed on the yarn transmission path 101, so that the hook 13 can be selectively hung on the yarn 200, the hook 13 is under the tension of the yarn 200 and has a first position where it is hung on the yarn 200 and away from the trigger 12 and a second position where it is not hung on the yarn 200 and contacts the trigger 12, and the hook 13 has a movement track 131 that is converted from the first position to the second position. On the other hand, the supporting block 14 is disposed opposite to the wire breakage detecting trigger base 12, for example, the supporting block 14 is located in the body 11 at a position relatively higher than the wire breakage detecting trigger base 12. In one embodiment, the support block 14 has at least one through hole 141 for the wire breakage detecting hook 13 to pass through, and the through hole 141 limits the motion track 131 of the wire breakage detecting hook 13.

On the other hand, referring back to fig. 4 to 6, the novel power-off device 10 of the sewing machine further includes an elastic member 15, the elastic member 15 is disposed between the hook 13 for detecting broken thread and the trigger seat 12 for detecting broken thread and is respectively connected to the hook 13 for detecting broken thread and the trigger seat 12 for detecting broken thread, and the elastic member 15 is used to stabilize the movement track 131 of the hook 13 for detecting broken thread. To explain this, referring to fig. 4 to 6, it is assumed that the thread breakage detecting hook 13 is initially at the first position, i.e., the sewing machine 100 is not powered off in the initial state. At this time, the hook 13 will enter a first state, and the hook 13 is hung on the yarn 200 and supported by the tension of the yarn 200, so that the hook 13 does not compress the elastic member 15 and is away from the trigger seat, and at this moment, the hook 13 is not conducted with the trigger seat 12, so that the sewing machine 100 can operate continuously. Then, referring back to fig. 6, once the tension of the yarn 200 is removed, the yarn 200 no longer supports the breakage detecting hook 13, and the breakage detecting hook 13 will move from the first position to the second position to enter a second state. At this time, since the breakage detecting hook 13 is acted by the elastic member 15, the movement locus 131 of the breakage detecting hook 13 is stabilized without being deviated. When the thread breakage detecting hook 13 is temporarily contacted with the thread breakage detecting trigger 12, the thread breakage detecting hook 13 or the thread breakage detecting trigger 12 outputs a power-off signal to a sewing machine control device (not shown), and when the sewing machine control device receives the power-off signal, the sewing machine control device powers off the sewing machine 100 and stops working.

Therefore, the elastic member 15 is disposed between the novel broken line detection hook 13 and the broken line detection trigger seat 12, so that the elastic member 15 can guide the broken line detection hook 13, and the broken line detection hook 13 can be stabilized when moving on the movement track 131.

In an embodiment, referring to fig. 4 and 5, the disconnection detecting trigger 12 includes a carrying portion 121 disposed on the body 11 and an electrical portion 122 corresponding to the carrying portion 121 and generating the power-off signal when the electrical portion is temporarily contacted with the disconnection detecting hook 13. First, the carrying portion 121 is described, and the carrying portion 121 is disposed on a side of the disconnection detecting trigger base 12 facing the elastic elements 15, so that the carrying portion 121 can be assembled with the elastic elements 15. The bearing portion 121 has a plurality of assembling holes 123 respectively corresponding to one of the elastic members 15, and the elastic members 15 are firmly assembled to one of the assembling holes 123, each of the elastic members 15 has a diameter-reducing section 151 extending out of the assembling hole 123 and an diameter-expanding section 152 connected to the diameter-reducing section 151, specifically, when assembled, the diameter-reducing section 151 penetrates through the side of the wire breakage detection trigger seat 12 where the electrical portion 122 is disposed, and the diameter-reducing section 151 is partially exposed outside the wire breakage detection trigger seat 12, and the diameter-expanding section 152 is located on the side of the wire breakage detection trigger seat 12 after the assembly is completed, and the diameter of the diameter-expanding section 152 is greater than the diameter of the assembling hole 123, so that the diameter-expanding section 152 is limited by the wire breakage detection trigger seat 12.

On the other hand, referring to fig. 4 to fig. 6, the electrical portion 122 of the disconnection detecting trigger base 12 is disposed opposite to the carrying portion 121, that is, the electrical portion 122 is disposed on a side of the disconnection detecting trigger base 12 away from the elastic members 15. In order to make the electrical part 122 contact with the disconnection detecting hook 13 when the disconnection detecting hook 13 enters the second state, the electrical part 122 has a plurality of conductive terminals respectively corresponding to one of the assembly holes 123. In another embodiment, the assembly holes 123 are arranged in two rows, so that the conductive terminals are disposed corresponding to the assembly holes 123 and are also disposed in two rows, respectively, and the conductive terminals on the same row are formed by the same metal plate 124.

On the other hand, in an embodiment, the yarn breakage detecting hook 13 includes a yarn hanging portion 132 for hanging the yarn 200 and at least one triggering portion 133 connected to the yarn hanging portion 132 and extending toward the elastic member 15. More specifically, in the implementation, the hook 13 is located on the yarn transmission path 101, so that the yarn hanging portion 132 is under the tension of the yarn 200 and can be switched from the first state to the second state, and when the hook 13 is in the second state, the hook 13 momentarily contacts the trigger 12 at a terminal 134 of the trigger 133, so that the trigger 133 and the trigger 12 are conducted to transmit the power-off signal. More specifically, the triggering portion 133 is a linear structure, the thread hanging portion 132 has two turning segments 135 respectively connected to one of the triggering portions 133 and an arc-shaped segment 136 disposed between the two turning segments 135, and in the first state, the yarn 200 is hung on the turning segment 135 and is limited by the arc-shaped segment 136, thereby preventing the thread breakage detecting hook 13 from slipping off the yarn 200.

On the support, the hook 13 for detecting broken wire is provided with at least one weight 137 facing the trigger seat 12 for detecting broken wire, the weight 137 can be assembled on the end 134 of one of the trigger parts 133 by at least one assembling element 138, so that the weight 137 can increase the weight of the hook 13 for detecting broken wire, thereby maintaining the speed of the movement track 131 when the hook 13 for detecting broken wire is changed from the first state to the second state. In one embodiment, the weight 137 has a tapered structure 139 on a side facing the disconnection detecting trigger seat 12, when the disconnection detecting hook 13 is assembled with the elastic member 15, the tapered structure 139 partially penetrates into the elastic member 15 and the tapered structure 139 is limited by the elastic member 15, thereby preventing the disconnection detecting hook 13 from being unstably assembled with the elastic member 15 during state switching.

In one embodiment, referring to fig. 2 to 4 again, the main body 11 has two oppositely disposed retaining walls 111 and a bottom plate 112 disposed between the retaining walls 111 for providing the broken thread detection trigger seat 12, in order to make the yarn 200 penetrate through the main body 11, the retaining walls 111 are disposed on the yarn transmission path 101, the main body 11 is provided with a plurality of threading holes 113 respectively disposed on the yarn transmission path 101 on the retaining walls 111, the threading holes 113 are respectively disposed on the two oppositely disposed retaining walls 111, and the threading hole 113 on one retaining wall 111 is disposed corresponding to the threading hole 113 on the other retaining wall 111. When the yarn 200 is transported on the yarn transferring path 101, the yarn 200 passes through the threading holes 113 respectively. Moreover, in order to reduce the friction between the yarn 200 and the threading holes 113, the body 11 may further include a plurality of yarn guides 114 respectively corresponding to one of the threading holes 113, so as to prevent the yarn 200 from being unsmooth or even broken due to the friction of the yarn 200 with the wall of the threading hole 113. On the other hand, in order to assemble the body 11 on the sewing machine 100, in one embodiment, the body 11 further has an installation component 115 disposed outside one of the retaining walls 111 to be assembled with the sewing machine 100.

While the invention has been described in detail in the foregoing for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations and modifications can be made therein without departing from the spirit and scope of the invention except as it may be limited by the claims.

Claims

1. The utility model provides a sewing machine outage device, this sewing machine outage device locates on a yarn transmission path of a sewing machine, this sewing machine outage device contains a body, a broken string that locates on this body detects trigger seat, at least a broken string detects the couple, one locates on this body and provides the piece that holds that this broken string detects the couple setting, this broken string detects the couple and has one to be located this yarn transmission path with the tension effect that receives a yarn and keep away from the first state that this broken string detected trigger seat, and one in this yarn tension disappearance transient contact this broken string detects the second state of trigger seat, this broken string detects trigger seat and this broken string detects when the couple contact makes a sewing machine controlling means connect and obtain a outage signal, its characterized in that:

the sewing machine power-off device comprises at least one elastic piece, wherein the elastic piece is arranged between the thread breakage detection hook and the thread breakage detection trigger seat and stabilizes a motion track of the thread breakage detection hook when the thread breakage detection hook is switched from the first state to the second state.

2. The sewing machine power-off device according to claim 1, wherein: the broken line detection trigger seat comprises a bearing part arranged on the body and an electric part which corresponds to the bearing part and generates the power-off signal when being temporarily contacted with the broken line detection hook, the bearing part is provided with a plurality of assembling holes which are respectively arranged corresponding to one of the elastic pieces, and the electric part is provided with a plurality of conductive terminals which are respectively corresponding to one of the assembling holes.

3. A power cut-off device for a sewing machine according to claim 2, wherein: the conductive terminals are respectively arranged on the two rows, and the conductive terminals on the same row are formed by a metal plate.

4. The sewing machine power-off device according to claim 3, wherein: the elastic piece is provided with a reducing section penetrated by the assembling hole and an expanding section which is connected with the reducing section and assembled at one side of the broken wire detection trigger seat.

5. The sewing machine power-off device according to any one of claims 1 to 4, wherein: the broken thread detection hook comprises a thread hanging part for hanging the yarn and at least one triggering part which is connected with the thread hanging part and extends towards the direction of the elastic part, and when the broken thread detection hook is switched from the first state to the second state, one tail end of the broken thread detection hook on the triggering part briefly contacts the broken thread detection triggering seat.

6. The sewing machine power-off device according to claim 5, wherein: the trigger part is a straight line structure, and the wire hanging part is provided with two turning line sections which are respectively connected with one of the trigger parts and an arc line section which is arranged between the two turning line sections.

7. The sewing machine power-off device according to claim 6, wherein: the broken line detection hook is provided with at least one weight facing the broken line detection trigger seat, and one side of the weight facing the broken line detection trigger seat is of a conical structure.

8. The sewing machine power-off device according to claim 1, wherein: the broken line detection hook is provided with at least one weight facing the broken line detection trigger seat, and one side of the weight facing the broken line detection trigger seat is of a conical structure.

9. The sewing machine power-off device according to claim 1, wherein: the bearing block is provided with at least one through hole for the wire breakage detection hook to penetrate through.

10. The sewing machine power-off device according to claim 1, wherein: the body is provided with a plurality of threading holes which are respectively positioned on the yarn transmission path.

11. A power cut-off device for a sewing machine according to claim 10, wherein: the body is provided with a plurality of yarn guiding pieces which are respectively arranged corresponding to one of the threading holes.

12. A power-off device for a sewing machine according to claim 10 or 11, wherein: the body is provided with two retaining walls which are oppositely arranged and a bottom plate which is arranged between the two retaining walls and is used for providing the setting of the broken thread detection trigger seat, and each retaining wall is provided with the threading holes which are positioned on the yarn transmission path.