TWM590597U - Circuit breaker device for sewing machine - Google Patents

Abstract

A power-off device for a sewing machine includes a body, a thread breakage detection trigger seat provided on the body, at least a thread breakage detection hook, and a bearing block provided with the thread breakage detection hook, the thread breakage detection hook has a receiving When the tension of a yarn acts away from the first state of the thread breakage detection trigger seat, and a second state of briefly contacting the thread breakage detection trigger seat when the yarn tension disappears, the thread breakage detection trigger seat and the When the disconnection detection hook contacts, a sewing machine control device receives a power cut signal. The present invention is provided with an elastic member between the disconnection detection trigger base and the disconnection detection hook. The elastic member stabilizes the disconnection detection hook when the disconnection detection hook changes from the first state to the second state A movement track.

Description

Power-off device for sewing machine

The present invention relates to a power-off device for a sewing machine, in particular to a power-off device that uses an elastic member to stably break a thread and detect the movement path of a hook.

Pressing, the sewing machine is prone to thread breakage during sewing operations. When the sewing machine is broken, if the machine continues to run inside, it may cause the related sewing components to be in an abnormal working state, which may cause parts damage. At the same time, due to yarn breakage, the sewing process is incomplete, and defective products are prone to occur. In addition, in order to avoid the aforementioned problems, most of the existing sewing machines are provided with a power-off device, and the relevant power-off device is as disclosed in the patent TW 397065 of the Republic of China.

Further, according to the disclosure in the patent specification, it can be known that the power-off device includes at least one pull rod hanging on the sewing thread and a plurality of conductive sheets disposed opposite to the pull rod. When the sewing thread breaks and no longer supports the draw bar, the draw bar is lowered so that its conductive end contacts the conductive pieces, and the draw bar will be electrically short-circuited with the conductive pieces to cut off the power supply of the sewing machine. However, the displacement path of the cable rod when it descends may be offset. Under long-term use, the cable rod impacts the conductive sheets multiple times, which may easily cause the conductive sheets to shift, which may cause the cable The rod cannot reliably contact the conductive pieces, so that the power-off device cannot be reliably operated.

The main purpose of the present invention is to solve the conventional problems caused by the uncontrollable descending path of the wire rod, which causes the conductive sheet to be easily hit and shifted.

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 provided on a yarn transmission path of a sewing machine. The power-off device for a sewing machine includes a body and a thread breakage detection device provided on the body. Trigger seat, at least one thread breakage detection hook, a bearing block provided on the body and provided with the thread breakage detection hook, the thread breakage detection hook has a thread located on the yarn transmission path to be subject to the tension of a yarn Functioning away from the first state of the thread breakage detection trigger seat, and a second state of briefly contacting the thread breakage detection trigger seat when the yarn tension disappears, when the thread breakage detection trigger seat contacts the thread breakage detection hook Make a sewing machine control device receive a power-off signal. Further, the power-off device of the sewing machine includes at least one elastic member, the elastic member is disposed between the disconnection detection hook and the disconnection detection trigger seat, and the disconnection detection hook is switched from the first state to the second state Stabilize a movement trajectory of the disconnection detection hook in the state.

In one embodiment, the disconnection detection trigger base includes a carrying part provided on the body and a pair of electrical parts corresponding to the carrying part and generating the disconnection signal when briefly contacted with the disconnection detection hook, the The bearing part has a plurality of assembly holes respectively corresponding to one of the elastic members, and the electrical part has a plurality of conductive terminals respectively corresponding to one of the assembly holes.

In one embodiment, the conductive terminals are respectively arranged 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 reduced diameter section penetrating through the assembly hole and an enlarged diameter section connected to the reduced diameter section and assembled on one side of the disconnection detection trigger seat.

In one embodiment, the thread breakage detection hook includes a thread hanging part for hanging the yarn and at least one trigger part connected to the thread hanging part and extending toward the elastic member. The thread breakage detection hook is formed by the first When the state transitions to the second state, one end of the disconnection detection hook on the trigger part briefly contacts the disconnection detection trigger seat.

In one embodiment, the triggering part has a straight line structure, and the hanging line part has two turning line segments respectively connected to one of the triggering parts and an arc line segment provided between the two turning line segments.

In one embodiment, at least one weighting block facing the wire breakage detection trigger seat is provided on the wire breakage detection hook, and a side of the weight block facing the wire breakage detection trigger seat is a tapered structure.

In one embodiment, the bearing block has at least one through hole through which the wire breakage detection hook passes.

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 guide members respectively corresponding to one of the threading holes.

In one embodiment, the body has two opposing retaining walls and a bottom plate disposed between the two retaining walls to provide the disconnection detection trigger seat, and each of the retaining walls has the yarn transmission paths Threading hole on the.

According to the aforementioned new content, compared with the conventional technology, the present invention has the following characteristics: the new model is provided on the disconnection detection hook and the disconnection detection trigger seat through the elastic member, so that the elastic member can be detected on the power failure When the hook is switched from the first state to the second state, the movement trajectory of the power-off detection hook is stabilized, and the situation that the power-off device cannot be operated reliably is reduced.

The detailed description and technical content of the new model are explained as follows in conjunction with the diagram:

Please refer to FIGS. 1 to 4, the present invention provides a power-off device 10 for a sewing machine. The power-off device 10 is provided on a yarn transmission path 101 of a sewing machine 100. The yarn transmission path 101 refers to a yarn The thread 200 is transported from the yarn feed 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 pass through the sewing machine power-off device 10, a The yarn tension adjusting device 30 and a swinging and pulling assembly 40. In addition, herein, the yarn transmission path 101 is illustrated by the transmission path of the yarn 200 between the sewing machine power-off device 10, the yarn tension adjustment device 30, and the swinging and pulling assembly 40. The yarn transmission path 101 belongs to Those with ordinary knowledge in this field can understand and implement based on the aforementioned content, and will not repeat them here.

3 to 6 again, the sewing machine power-off device 10 includes a body 11, a wire break detection trigger seat 12 provided on the body 11, at least one wire break detection hook 13, and a body 11 provided on the body 11 And the bearing block 14 provided by the disconnection detection hook 13 is provided. The disconnection detection trigger base 12 is disposed on the side of the body 11. For example, the disconnection detection trigger base 12 may be disposed on the bottom of the body 11. In addition, the thread breakage detection hook 13 is provided on the yarn transmission path 101, so that the thread breakage detection hook 13 can be selectively hung on the yarn 200, and the thread breakage detection hook 13 is subjected to the tension of the yarn 200 It has a first position that is hung on the yarn 200 and away from the thread breakage detection trigger seat 12 and a second position that is not hung on the yarn 200 and contacts the thread breakage detection trigger seat 12, and the The wire breakage detection hook 13 has a movement track 131 that transitions from the first position to the second position. On the other hand, the bearing block 14 is disposed relative to the disconnection detection trigger base 12, for example, the bearing block 14 is located in the body 11 relatively higher than the disconnection detection trigger base 12. In one embodiment, the bearing block 14 has at least one through hole 141 through which the wire breakage detection hook 13 is inserted, and the through hole 141 restricts the movement track 131 of the wire breakage detection hook 13.

On the other hand, please refer to FIG. 4 to FIG. 6 again, the power-off device 10 of the present invention is further provided with an elastic member 15 disposed between the disconnection detection hook 13 and the disconnection detection trigger base 12 Moreover, the wire breakage detection hook 13 and the wire breakage detection trigger base 12 are respectively connected, and the elastic member 15 is used to stabilize the movement track 131 of the wire breakage detection hook 13. For specific explanation, please refer to FIG. 4 to FIG. 6 again. It is first assumed that the thread breakage detection hook 13 is initially in the first position, that is, the sewing machine 100 is not powered off in the initial state. At this time, the thread breakage detection hook 13 will enter a first state, the thread breakage detection hook 13 is hung on the yarn 200 and is supported by the tension of the yarn 200, so that the thread breakage detection hook 13 does not compress the elasticity The piece 15 is further away from the disconnection detection trigger base 12. At this moment, the disconnection detection hook 13 and the disconnection detection trigger base 12 are not conducting, so that the sewing machine 100 can continue to operate. Next, referring back to FIG. 6, once the tension of the yarn 200 disappears, the yarn 200 no longer supports the thread breakage detection hook 13, and the thread breakage detection hook 13 will be displaced from the first position to the second position to Enter a second state. At this time, since the wire breakage detection hook 13 is acted on by the elastic member 15, the movement trajectory 131 of the wire breakage detection hook 13 can be stabilized without deviation. When the wire breakage detection hook 13 and the wire breakage detection trigger seat 12 are in short contact, the wire breakage detection hook 13 or the wire breakage detection trigger seat 12 will output a power break signal to a sewing machine control device (not shown) After the sewing machine control device receives the power-off signal, the sewing machine control device will power off the sewing machine 100 and stop working.

According to this, the present invention provides the elastic member 15 between the disconnection detection hook 13 and the disconnection detection trigger base 12 so that the elastic member 15 can guide the disconnection detection hook 13 to make the disconnection detection hook 13 is stabilized when it is displaced on the movement track 131.

In one embodiment, please refer to FIG. 4 and FIG. 5 again, the disconnection detection trigger base 12 includes a supporting portion 121 provided on the body 11 and a pair of corresponding supporting portions 121 and is connected to the disconnection detection hook 13 The electrical part 122 that generates the power-off signal during a brief contact. First, the load-bearing portion 121 will be described. The load-bearing portion 121 is disposed on the side of the disconnection detection trigger base 12 facing the elastic members 15 so that the load-bearing portion 121 can be assembled with the elastic members 15. The bearing portion 121 has a plurality of assembly holes 123 respectively corresponding to one of the elastic members 15, and the elastic members 15 are firmly assembled on one of the assembly holes 123, and each of the elastic members 15 has a The reduced-diameter section 151 through the assembly hole 123 and an enlarged-diameter section 152 connected to the reduced-diameter section 151, specifically, when assembled, the reduced-diameter section 151 is provided with the electrical One side of the part 122 is penetrated, and the reduced diameter section 151 is partially exposed outside the disconnection detection trigger seat 12, and the enlarged diameter section 152 is located on the side of the disconnection detection trigger seat 12 after the assembly is completed, And the diameter of the enlarged diameter section 152 is larger than the diameter of the assembly hole 123, so that the enlarged diameter section 152 is limited by the disconnection detection trigger seat 12.

On the other hand, please refer to FIG. 4 to FIG. 6 again, the electrical part 122 of the disconnection detection trigger base 12 is disposed relative to the carrying part 121, that is, the electrical part 122 is disposed on the disconnection detection trigger base 12 One side away from the elastic members 15. In order for the electrical part 122 to contact the disconnection detection hook 13 when the disconnection detection 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. Furthermore, in one embodiment, the assembly holes 123 are arranged in two rows, so the conductive terminals are provided corresponding to the assembly holes 123 and are also respectively disposed on the two rows, and the conductive terminals on the same row are formed by The same metal plate 124 is formed.

On the other hand, in one embodiment, the thread breakage detection hook 13 includes a thread hanging portion 132 for hanging the yarn 200 and at least one trigger portion connected to the thread hanging portion 132 and extending toward the elastic member 15 133. More specifically, during implementation, the thread breakage detection hook 13 will be located on the yarn transmission path 101 so that the thread hanging portion 132 can be subjected to the tension of the yarn 200 and can be switched from the first state to the first In the second state, when the disconnection detection hook 13 is in the second state, an end 134 of the disconnection detection hook 13 on the trigger part 133 briefly contacts the disconnection detection trigger seat 12, so that the trigger part 133 and the The wire break detection trigger base 12 is turned on and transmits the power cut signal. Furthermore, the trigger part 133 has a straight line structure, and the hanging line part 132 has two turning line segments 135 respectively connected to one of the trigger parts 133 and an arc line segment 136 provided between the two turning line segments 135, in In the first state, the yarn 200 is hung on the turning line segment 135, and is restricted by the arc-shaped line segment 136, thereby preventing the thread breakage detection hook 13 from slipping off the yarn 200.

By the way, the disconnection detection hook 13 is provided with at least one weighting block 137 facing the disconnection detection trigger base 12, the weighting block 137 can be connected to at least one set of connecting pieces 139 to one of the triggering parts 133 At the end 134, the weighting block 137 is used to increase the weight of the wire breakage detection hook 13, thereby maintaining the speed of the movement track 131 when the wire breakage detection hook 13 transitions from the first state to the second state. In one embodiment, the weighting block 137 has a tapered structure 138 on the side facing the disconnection detection trigger seat 12, when the disconnection detection hook 13 is assembled with the elastic member 15, the tapered structure Part 138 penetrates into the elastic member 15 and restricts the tapered structure 138 by the elastic member 15, thereby avoiding that the disconnection detection hook 13 cannot be stably assembled with the elastic member 15 when the state is switched.

In one embodiment, please refer to FIG. 2 to FIG. 4 again, the body 11 has two opposing retaining walls 111 and a bottom plate 112 disposed between the retaining walls 111 to provide the disconnection detection trigger seat 12 for Let the yarn 200 pass through the body 11, the retaining walls 111 are provided on the yarn transmission path 101, and the body 11 is provided with pluralities on the retaining walls 111 respectively located on the yarn transmission path 101 The threading holes 113 can be arranged on the two opposing retaining walls 111 respectively, and one of the threading holes 113 on the retaining wall 111 corresponds to the threading holes 113 on the other retaining wall 111 Settings. When the yarn 200 is transported on the yarn transmission path 101, the yarn 200 will pass through the threading holes 113 respectively. In addition, in order to reduce the friction between the yarn 200 and the threading hole 113, the body 11 may be provided with a plurality of yarn guides 114 respectively corresponding to one of the threading holes 113, thereby preventing the yarn 200 from being affected by the The wall surface of the threading hole 113 is rubbed and the yarn 200 is not smoothly conveyed, or even broken. On the other hand, in order to assemble the body 11 on the sewing machine 100, in one embodiment, the body 11 further has a mounting member 115 disposed outside one of the retaining walls 111 to assemble with the sewing machine 100 .

In summary, the above is only a preferred embodiment of the new model. When this cannot be used to limit the scope of the implementation of the new model, all changes and modifications made in accordance with the patent application of the new model should still belong to the new model. Covered by the patent.

100‧‧‧Sewing machine 101‧‧‧Yarn transmission path 10‧‧‧Power off device of sewing machine 11‧‧‧Body 111‧‧‧ Retaining wall 112‧‧‧Bottom plate 113‧‧‧Threading hole 114‧‧‧Yarn guide 115‧‧‧Installation 12‧‧‧Disconnection detection trigger seat 121‧‧‧Bearing part 122‧‧‧Electrical part 123‧‧‧Assembly hole 124‧‧‧Metal plate 13‧‧‧Disconnection detection hook 131‧‧‧Motion track 132‧‧‧Hanging Department 133‧‧‧ Trigger Department 134‧‧‧End 135‧‧‧ turning line 136‧‧‧ Curved line segment 137‧‧‧Heavy weight 138‧‧‧conical structure 139‧‧‧ Group connection 14‧‧‧ block 141‧‧‧Through hole 15‧‧‧Elastic parts 151‧‧‧Reduced diameter section 152‧‧‧Expanded section 20‧‧‧arm 30‧‧‧Yarn tension adjustment device 40‧‧‧Swing and pull assembly 200‧‧‧Yarn

Fig. 1 is a schematic diagram of the installation position of the power-off device of a sewing machine according to an embodiment of the present invention (1). Fig. 2 is a schematic diagram of the installation position of the power-off device of the sewing machine according to an embodiment of the present invention (2). FIG. 3 is a three-dimensional structure diagram of a power-off device of a sewing machine according to an embodiment of the present invention. FIG. 4 is an exploded schematic view of the power-off device of the sewing machine according to an embodiment of the present invention. Fig. 5 is a schematic diagram of a first state of a power-off device for a sewing machine according to an embodiment of the present invention. FIG. 6 is a second state schematic diagram of a power-off device for a sewing machine according to an embodiment of the present invention.

101‧‧‧Yarn transmission path

10‧‧‧Power off device of sewing machine

11‧‧‧Body

111‧‧‧ Retaining wall

112‧‧‧Bottom plate

113‧‧‧Threading hole

114‧‧‧Yarn guide

115‧‧‧Installation

12‧‧‧Disconnection detection trigger seat

123‧‧‧Assembly hole

13‧‧‧Disconnection detection hook

131‧‧‧Motion track

132‧‧‧Hanging Department

133‧‧‧ Trigger Department

137‧‧‧Heavy weight

138‧‧‧conical structure

139‧‧‧ Group connection

14‧‧‧ block

141‧‧‧Through hole

15‧‧‧Elastic parts

151‧‧‧Reduced diameter section

152‧‧‧Expanded section

200‧‧‧Yarn

Claims (12)

A sewing machine power-off device is provided on a yarn transmission path of a sewing machine. The sewing machine power-off device includes a body, a thread breakage detection trigger seat provided on the body, and at least one thread breakage detection Hook, a bearing block provided on the body and provided with the thread breakage detection hook, the thread breakage detection hook has a position on the yarn transmission path to be affected by the tension of a yarn away from the thread breakage detection trigger The first state of the seat and a second state of briefly contacting the thread breakage detection trigger seat when the yarn tension disappears, when the thread breakage detection trigger seat contacts the thread breakage detection hook, a sewing machine control device receives a Power-off signal, the power-off device of the sewing machine is characterized by: The power-off device of the sewing machine includes at least one elastic member, the elastic member is disposed between the disconnection detection hook and the disconnection detection trigger seat and is stable when the disconnection detection hook is switched from the first state to the second state The disconnection detects a movement track of the hook. The power-off device for a sewing machine according to claim 1, wherein the disconnection detection trigger seat includes a load-bearing part provided on the body and a pair of the load-bearing parts and the break occurs when the contact with the breakage detection hook is briefly made For the electrical part of the electrical signal, the carrying part has a plurality of assembly holes respectively corresponding to one of the elastic members, and the electrical part has a plurality of conductive terminals respectively corresponding to one of the assembly holes. The power-off device for a sewing machine according to claim 2, wherein the conductive terminals are respectively arranged on two rows, and the conductive terminals on the same row are formed by a metal plate. The power-off device for a sewing machine according to claim 3, wherein the elastic member has a reduced-diameter section penetrated by the assembly hole and an expanded diameter connected to the reduced-diameter section and assembled on the side of the disconnection detection trigger seat segment. The power-off device for a sewing machine according to any one of claims 1 to 4, wherein the thread breakage detection hook includes a thread hanging portion that provides hanging of the yarn and at least one connecting the thread hanging portion and extending toward the elastic member When the disconnection detection hook is switched from the first state to the second state, an end of the disconnection detection hook on the trigger part briefly touches the disconnection detection trigger seat. The power-off device for a sewing machine according to claim 5, wherein the triggering part has a straight line structure, the thread-hanging part has two turning line segments respectively connected to one of the triggering parts, and an arc-shaped line segment provided between the two turning line segments . The power-off device for a sewing machine according to claim 6, wherein the thread breakage detection hook is provided with at least one weighting block facing the thread breakage detection trigger seat, the side of the weight block facing the thread breakage detection trigger seat is A conical structure. The power-off device for a sewing machine according to claim 1, wherein the thread breakage detection hook is provided with at least one weighting block facing the thread breakage detection trigger seat, and the side of the weight block facing the thread breakage detection trigger seat is A conical structure. The power-off device for a sewing machine according to claim 1, wherein the bearing block has at least one through hole through which the thread breakage detection hook is inserted. The power-off device for a sewing machine according to claim 1, wherein the body has a plurality of threading holes respectively located on the yarn transmission path. The power-off device for a sewing machine according to claim 10, wherein the body has a plurality of yarn guides respectively corresponding to one of the threading holes. The power-off device for a sewing machine according to claim 10 or 11, wherein the main body has two opposing retaining walls and a bottom plate provided between the two retaining walls to provide the disconnection detection trigger seat, each of which is The wall has these threading holes on the yarn transmission path.

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