CN213113818U - Machine head and sewing machine - Google Patents

Abstract

The utility model relates to a machine head and sewing machine, the side of machine head is provided with the restraint part that is used for retraining the group, the restraint part is provided with the wire passing channel, the wire passing channel is used for leading the line in the group to penetrate from the upper end of the wire passing channel and penetrate out from the lower end of the wire passing channel; the utility model provides a machine head, the position that sets up of group is more reasonable, and turning radius is littleer, not only can effectively reduce the volume of whole machine head, and is safer to effectively reduce the inertia of whole machine head, existing being favorable to energy-conservation, being favorable to the rotation angle of accurate control machine head again, can effectively change the threading route moreover, be favorable to more steady, stable crossing the line.

Description

Machine head and sewing machine

Technical Field

The utility model relates to a weaving equipment technical field, concretely relates to sewing machine aircraft nose and sewing machine.

Background

Sewing machines are commonly used sewing machines, which generally make use of one or more sewing threads to form one or more stitches in the material to be sewn, to interlace or stitch together one or more layers of material; the sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitch is neat, beautiful, flat and firm, has high sewing speed and simple and convenient use, and is widely applied in the sewing industry.

At present, the types of sewing machines are various, but the sewing machines with various structures generally comprise a machine head, a rotating shuttle mechanism matched with the machine head and a sewing platform used for flatly placing sewing materials, wherein the machine head is a main part of the sewing machine and generally comprises four mechanisms of material puncturing, thread hooking, thread taking and feeding and auxiliary mechanisms of winding, material pressing, tooth falling and the like, the machine head is generally arranged above the sewing platform, the rotating shuttle mechanism is generally arranged below the sewing platform and corresponds to the position of the machine head, and the rotating shuttle mechanism is matched with the machine head so as to smoothly finish sewing.

The computer sewing machine with the head capable of rotating 360 degrees (or a 360-degree-rotation perfect-stitch sewing machine and a computer pattern template sewing machine) is one of sewing machines and is also a common sewing machine, the sewing machine generally comprises a sewing platform, a supporting arm arranged on the sewing platform and the head arranged on the supporting arm, the sewing platform is provided with a rotating shuttle mechanism matched with the head, and when the computer sewing machine is actually used, the head can rotate freely within a range of 360 degrees under the control of a controller so as to meet the requirements of different stitches; since the head of the sewing machine can rotate, the thread group for supplying thread is usually arranged on the head and can rotate synchronously with the head, in the prior art, the thread group is usually arranged on the outer side of the head along the circumferential direction of the head in an inclined way, and the threading path is as follows: the line is via the group, wind the aircraft nose opposite side from the well upper portion of aircraft nose, wind the position department of transferring the line pole behind the thread trapper, wear the needle bar department downwards via transferring the line pole at last, however, adopt such mode to set up the group, not only make the volume of whole aircraft nose great, the radius of gyration that leads to the aircraft nose is great, not only have great potential safety hazard, but also lead to the inertia of whole aircraft nose big, both increase the energy consumption, be unfavorable for the rotation angle of accurate control aircraft nose again, treat to improve urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to improve the not enough that exists among the prior art, provide a sewing machine aircraft nose, the position that sets up of group is more reasonable, and radius of gyration is littleer, safer, not only can effectively reduce the volume of whole aircraft nose to effectively reduce the inertia of whole aircraft nose, existing being favorable to energy-conservation, the rotation angle that is favorable to the accurate control aircraft nose again, can effectively change the threading route moreover, be favorable to more steady, stable crossing the line.

The utility model adopts the technical proposal that:

the utility model discloses the setting that will solve current group leads to that aircraft nose inertia is big, unsafe problem provides a aircraft nose, and the side of aircraft nose is provided with the restraint part that is used for retraining the group, the restraint part is provided with wire passing channel, wire passing channel is arranged in the line that draws in the wire group and penetrates from wire passing channel's upper end to wear out from wire passing channel's lower extreme. In this scheme, restrain the group through setting up the restraint part, prevent that the group from droing, make the group rotate with the aircraft nose synchronization, and through setting up the wire passing channel at the restraint part, make the line that breaks away from the group can penetrate the wire passing channel from the upper end of restraint part, and wear out from the lower extreme of wire passing channel under the guide of wire passing channel, make the removal of line edge from the top down direction, adopt such structural design, make the group can set up in the position department that is closer to aircraft nose rotation center, not only can effectively change current threading mode and threading route, more be favorable to realizing stable line of crossing, and can effectively reduce the volume of whole aircraft nose, reduce radius of rotation, reduce the potential safety hazard, can also effectively reduce the inertia of whole aircraft nose, not only have energy-conservation, be favorable to the rotation angle of accurate control aircraft nose again.

Preferably, the constraining member is a rod-like structure, and the constraining member is used for passing through the wire group. Therefore, the restraint of the wire group is realized, and the wire group is prevented from falling off from the handpiece.

The second aspect of the utility model is to solve the problem that the existing machine head has irregular shape, which causes potential safety hazard in the rotating process, preferably, the outer side of the machine head is provided with a protective cover which is detachably arranged on the machine head and is used for covering the machine head along the circumferential direction of the rotation of the machine head,

the constraining member is secured to the shield or handpiece. In this scheme, set up the protection casing through the outside at the aircraft nose, can with the aircraft nose, integrate in the inside of the various mechanisms of aircraft nose and device etc. parcel in the protection casing, avoid the aircraft nose, integrate in the various mechanisms of aircraft nose and the condition that the aircraft nose rotation direction appears jaggedly to effectively avoid the aircraft nose to accidentally injure the staff at rotatory in-process, thereby effectively improve the security, eliminate the potential safety hazard.

In order to reduce the rotational inertia generated by the protective cover in the rotating process, the protective cover is of a revolving body structure. So that the mass distribution of the protective cover along the circumferential direction is uniform, the rotational inertia generated by the protective cover in the rotating process is effectively reduced, and the machine head can be stopped at a required position quickly and accurately.

For the assembly problem of solving the protection casing, it is further, the protection casing is formed by two at least cover bodies adoption detachable mode concatenations, and each cover body is fixed in respectively detachable the aircraft nose. In this scheme, the protection casing is formed by two at least cover body concatenations, and each cover body is detachable respectively and is fixed in the aircraft nose to detachable interconnect is as an organic whole, thereby can enclose into the protection casing, in order to reach the purpose of parcel aircraft nose circumferencial direction.

To support the cord set, the handpiece or shield is preferably configured with a support portion for supporting the cord set, the restraining member being secured to the support portion. Thereby the line group sleeved on the restraining component can be just placed on the supporting part, and the purpose of supporting the line group is achieved.

Preferably, the supporting part is a receiving groove constructed on the machine head or the protective cover, and the constraint component is fixed at the bottom of the receiving groove and penetrates through the receiving groove;

or, the supporting part is a supporting platform arranged on the machine head or the protective cover, and the restraining component is fixed on the supporting part and penetrates through the supporting platform or the supporting platform to be provided with a hole corresponding to the wire passing channel. So that the thread can pass out of the thread passage in the top-to-bottom direction.

In order to guide the wire to the position of the wire clamping device, the wire guiding device further comprises a wire passing pipeline which is detachably fixed below the machine head or the protective cover and used for guiding the wire penetrating out of the wire passing channel to the position corresponding to the wire clamping device. Through setting up the line pipeline for the line can cross the line through the inside of crossing the line pipeline, can effectively prevent that the aircraft nose from rotating the in-process and causing the swing by a wide margin of line, is favorable to guaranteeing that the line crosses the line steadily along predetermined orbit.

The utility model discloses the third aspect will be solved restraint part upper end wire passing channel department and to the great problem of wearing and tearing of line, and is further, still includes guide part, guide part set up in restraint part's upper portion for increase the radius of bending when line gets into wire passing channel. In this scheme, increase the size of wire passing channel upper end entrance through setting up guide part for the line has bigger radius of bending when getting into wire passing channel from the upper end, both can effectively reduce frictional force, prevents that the line from wearing and tearing, can effectively prevent again that the local pulling force of the department line of bending is too big, leads to the fracture of line.

Preferably, the two ends of the guide member are respectively a first end and a second end, the diameter of the first end is smaller than that of the second end, the guide member is provided with a threading channel penetrating through the first end and the second end, the first end is connected with the restriction member, and the threading channel is communicated with the threading channel. Through setting up guide part for the line that breaks away from the group can get into the wire passing channel through second end and first end in proper order, because the diameter of second end is greater than the diameter of first end, makes online when passing through guide part, has bigger bend radius, thereby can effectively reduce frictional force, prevents that the line from being worn and torn, the rupture.

Preferably, the guide member is of a horn-like structure,

or, the guide part is in a conical structure, and at least the threading channel at the inner side of the second end is provided with an arc transition. The bending radius of the wire when it passes around the guide member can be effectively increased.

Preferably, a plurality of guide rings are arranged along the direction from the second end to the first end, the diameter of each guide ring is gradually reduced along the direction from the second end to the first end, and the guide rings are connected into a whole through a plurality of connecting pieces. The bending radius of the wire can be effectively reduced when the wire is wound around the guide part, and the purposes of reducing friction force and preventing the wire from being abraded and broken are achieved.

A sewing machine comprises a sewing platform, a supporting arm arranged on the sewing platform and a machine head, wherein the machine head is rotatably arranged on the supporting arm. So that the machine head can rotate freely within the range of 360 degrees in the sewing process to realize perfect stitch.

Compared with the prior art, use the utility model provides a pair of aircraft nose and sewing machine, the position that sets up of group is more reasonable, and radius of gyration is littleer, not only can effectively reduce the volume of whole aircraft nose, and is safer to effectively reduce the inertia of whole aircraft nose, existing being favorable to energy-conservation, being favorable to the rotation angle of accurate control aircraft nose again, can effectively change the threading route moreover, be favorable to more steady, stable crossing the line.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a handpiece provided in embodiment 1 of the present invention.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a right side view of fig. 1.

Fig. 4 is a second schematic structural diagram of a handpiece provided in embodiment 1 of the present invention.

Fig. 5 is a third schematic structural diagram of a handpiece provided in embodiment 1 of the present invention.

Fig. 6 is a schematic structural diagram of a handpiece provided in embodiment 3 of the present invention.

Fig. 7 is a second schematic structural diagram of a handpiece provided in embodiment 3 of the present invention.

Fig. 8 is a schematic structural diagram of a restraint assembly provided in embodiment 3 of the present invention.

Fig. 9 is a schematic structural view of a sewing machine provided in embodiment 4 of the present invention.

Description of the drawings

Head 100, protective cover 101, cover body 102, mounting hole 104, mounting plane 105, first opening 106, second opening 107, wire clamp 108, wire adjusting rod 109, accommodating groove 110, constraint component 111, wire passing channel 112, wire passing pipeline 113, wire group 114 and nut 115

Support arm 200 and operation screen 201

Sewing platform 300

Guide member 400, threading channel 401, first end 402, second end 403, arcuate transition 404, first member 405, locking hole 406.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1 to 5, in the present embodiment, a constraining member 111 for constraining a wire group 114 is disposed on a side surface of a handpiece 100, the constraining member 111 is provided with a wire passage 401, and the wire passage 401 is used for guiding a wire in the wire group 114 to pass through an upper end of the wire passage 401 and to pass through a lower end of the wire passage 401. In this embodiment, restraining component 111 is arranged to restrain cord set 114, so as to prevent cord set 114 from falling off, so that cord set 114 can rotate synchronously with handpiece 100, and restraining component 111 is provided with a cord passing channel 401, so that a cord detached from cord set 114 can pass through cord passing channel 401 from the upper end of restraining component 111 and pass out from the lower end of cord passing channel 401 under the guidance of cord passing channel 401, so as to move the cord in the direction from top to bottom, as shown in fig. 1-5, such a structural design is adopted that cord set 114 can be arranged at a position closer to the rotation center of handpiece 100, which not only can effectively change the existing threading manner and threading path, and is more beneficial to realizing stable cord passing, but also can effectively reduce the volume of whole handpiece 100, reduce the rotation radius, reduce the potential safety hazard, and effectively reduce the rotation inertia of whole handpiece 100, not only is energy-saving, but also the rotation angle of the handpiece 100 can be accurately controlled.

Preferably, the constraining member 111 may preferably adopt a rod-like structure, and the constraining member 111 is used for passing through the thread set 114, that is, the outer diameter of the constraining member 111 is smaller than or equal to the inner diameter of the central hole of the thread set 114, so as to constrain the thread set 114 and prevent the thread set 114 from falling off the handpiece 100; by way of example, the restraining member 111 may be a pipe.

To support the cord set 114, the handpiece 100 is preferably configured with a support portion for supporting the cord set 114, to which the constraint component 111 is fixed; so that the line set 114 sleeved on the constraint component 111 can be just placed on the supporting portion, thereby achieving the purpose of supporting the line set 114.

The support part has various embodiments, and as one embodiment, the support part may be a receiving groove 110 configured at the head 100, in which case the constraint part 111 is fixed to the bottom of the receiving groove 110 and passes through the receiving groove 110 so as to thread the thread out of the receiving groove 110;

as another embodiment, the supporting portion may be a supporting base provided on the head 100, in which case the restricting member 111 is fixed to the supporting portion and a hole corresponding to the thread passing channel 401 is provided through the supporting base or the supporting base so that the thread can pass through the thread passing channel 401 in a top-to-bottom direction.

The restricting member 111 may be detachably fixed to the supporting portion, for example, in the embodiment, the lower end of the restricting member 111 is provided with a section of external thread, and two nuts 115 are provided on the restricting member 111, and the two nuts 115 are respectively provided above and below the supporting portion, so that the restricting member 111 can be effectively fixed to the supporting portion.

In order to facilitate guiding the wire to the position of the wire holder 108, in a further aspect, a wire guiding duct 113 is further included, as shown in fig. 2 to 5, the wire guiding duct 113 is detachably fixed below the handpiece 100 or the shield 101 for guiding the wire coming out of the wire guiding channel 401 to the position corresponding to the wire holder 108.

Example 2

The main difference between the present embodiment 2 and the above embodiment 1 is that in the handpiece 100 provided in the present embodiment, a protective cover 101 is provided on the outer side of the handpiece 100, as shown in fig. 1 to 5, the protective cover 101 is detachably mounted on the handpiece 100, for example, the protective cover 101 can be fixed to the handpiece 100 by bolts, and the protective cover 101 is used for covering the handpiece 100 along the circumferential direction of rotation of the handpiece 100;

when the handpiece 100 is provided with the protective cover 101, the constraining member 111 may be fixed to the protective cover 101 or the handpiece 100, as shown in fig. 1 to 5, for example, in the present embodiment, the constraining member 111 is provided to the protective cover 101. In this scheme, through set up protection casing 101 in the outside of aircraft nose 100, can with aircraft nose 100, integrate in the inside of parcel such as various mechanisms of aircraft nose 100 and device at protection casing 101, avoid aircraft nose 100, integrate in the condition that the aircraft nose 100 direction of rotation appears jaggedly in the edge of various mechanisms of aircraft nose 100 and device to effectively avoid aircraft nose 100 to accidentally injure the staff at rotatory in-process, thereby effectively improve the security, eliminate the potential safety hazard.

In order to reduce the moment of inertia of the protection cover 101 during rotation, in a further embodiment, the protection cover 101 is of a revolving structure, for example, in this embodiment, the protection cover 101 may preferably be of a cylindrical structure, so that the mass distribution of the protection cover 101 along the circumferential direction is uniform, thereby effectively reducing the moment of inertia of the protection cover 101 during rotation, and further facilitating the rapid and accurate stop of the handpiece 100 at a desired position.

In order to solve the assembly problem of the protective cover 101, in a further scheme, the protective cover 101 is formed by splicing at least two cover bodies 102 in a detachable manner, and each cover body 102 is detachably fixed to the machine head 100; for example, as shown in fig. 2, 3, or 4, the protective cover 101 is formed by splicing two covers 102, and the two covers 102 are respectively provided with corresponding mounting holes 104 at the positions where they are butted with each other, so that the two covers 102 can be conveniently spliced by using bolts.

In this embodiment, the support portion may be provided to the handpiece 100 or the protection mask 101, and the constraining member 111 is fixed to the support portion; so that the line set 114 sleeved on the constraint component 111 can be just placed on the supporting portion, thereby achieving the purpose of supporting the line set 114. As an example, the supporting portion may be a receiving groove 110 configured at the handpiece 100 or the protective mask 101, as shown in fig. 1 to 5, in which the constraining member 111 is fixed to the bottom of the receiving groove 110 and passes through the receiving groove 110; the supporting portion may be a supporting base provided on the head 100 or the protection mask 101, and the constraining member 111 is fixed to the supporting portion and provided with a hole corresponding to the wire passage 401 through the supporting base or the supporting base. So that the thread can pass out of the thread passage 401 in the top-down direction; the thread passing pipe 113 can be preferentially arranged below the protective cover 101, so that the thread can pass through the inside of the thread passing pipe 113, the thread can be effectively prevented from greatly swinging in the rotation process of the handpiece 100, and the thread can be smoothly passed along a preset track.

In order to facilitate installation of the wire clamp 108, a mounting plane 105 is provided on one side of the protective cover 101, as shown in fig. 3 and 5, the mounting plane 105 may be formed by inwardly recessing one side of the protective cover 101, and by providing the mounting plane 105, the wire clamp 108, a mechanism for changing a wire direction, and the like may be conveniently installed on the plane, as shown in fig. 3 and 5.

In order to enable the wire adjusting rod 109 to move up and down along the vertical direction, in a further scheme, first openings 106 distributed along the vertical direction are disposed in the mounting plane 105, the first openings 106 are used for allowing the wire adjusting rod 109 to swing up and down, the first openings 106 may be directly machined on the protective cover 101, and a gap between two adjacent cover bodies 102 is formed, as shown in fig. 3 and 5, and details are not repeated here.

In order to facilitate the lower end of the handpiece 100 to penetrate out of the protective cover 101, the lower end of the protective cover 101 is provided with a second opening 107 for passing through the lower end of the handpiece 100, as shown in fig. 4 or 5, so that the lower end of the handpiece 100 can be exposed outside the protective cover 101;

since the thread is guided to the lower needle bar of the thread adjusting lever 109 after passing through the thread clamp 108 and the thread adjusting lever 109 during the lower sewing process, in order to facilitate the thread guiding from the thread adjusting lever 109 to the lower needle bar of the head 100, as a preferred embodiment, the first opening 106 and the second opening 107 may be communicated with each other, as shown in fig. 5, so that the thread can be conveniently guided from the thread adjusting lever 109 at the first opening 106 to the lower needle bar of the head 100.

Example 3

In order to solve the problem that if a wire separated from the wire group 114 directly passes through the wire passage 401 of the constraining member 111 due to the size limitation of the constraining member 111, the wire has a small bending radius, and the wire is worn more at the wire passage 401 at the upper end of the constraining member 111, in the present embodiment, the handpiece 100 further includes a guide member 400, and the guide member 400 and the constraining member 111 form a constraining assembly in which the guide member 400 is disposed at the upper portion of the constraining member 111 for increasing the bending radius of the wire when the wire enters the wire passage 401, as shown in fig. 6 to 8; in this scheme, increase the size of crossing the entrance of wire channel 401 upper end through setting up guide part 400 for the line has bigger radius of bending when getting into crossing wire channel 401 from the upper end, both can effectively reduce frictional force, prevents that the line from being worn and torn, can effectively prevent again that the local pulling force of the department line of bending is too big, leads to the fracture of line.

Preferably, the two ends of the guide member 400 are a first end 402 and a second end 403, respectively, the diameter of the first end 402 is smaller than that of the second end 403, the guide member 400 is provided with a threading channel 401 penetrating through the first end 402 and the second end 403, the first end 402 is connected with the restriction member 111, and the threading channel is communicated with the threading channel 401; by arranging the guide member 400, the wire separated from the wire group 114 can enter the wire passing channel 401 through the second end 403 and the first end 402 in sequence, and the diameter of the second end 403 is larger than that of the first end 402, so that the wire has a larger bending radius when passing through the guide member 400, thereby effectively reducing friction force and preventing the wire from being worn and broken.

The guide member 400 has various embodiments, and as a first example, the guide member 400 may have a horn-shaped structure, and the inner surface of the guide member 400 has an arc-shaped surface, so that the wire has a larger bending radius when passing through the guide member 400, thereby effectively reducing friction and preventing the wire from being worn and broken.

As a second example, the guiding part 400 may be a conical structure, and at least the threading channel inside the second end 403 is provided with an arc transition 404, as shown in fig. 6-8, which may effectively increase the bending radius of the wire when the wire passes around the guiding part 400; for example, the threading channel inside the second end 403 is provided with an arc transition 404, and the corner of the outside of the second end 403 is also provided with an arc transition 404, as shown in fig. 6-8, which can also effectively reduce the bending radius of the wire when the wire bypasses the guide member 400, thereby achieving the purposes of reducing friction force and preventing the wire from being worn and broken.

As a third example, a plurality of guide rings are disposed along the direction from the second end 403 to the first end 402, and the diameter of each guide ring is gradually reduced along the direction from the second end 403 to the first end 402, and the guide rings are connected into a whole by a plurality of connecting members. The bending radius of the wire when the wire is wound around the guide member 400 can be also effectively achieved, and the purposes of reducing friction force and preventing the wire from being worn and broken are achieved.

In this embodiment, the guiding member 400 and the constraining member 111 may be an integral structure, and the guiding member 400 is also detachably mounted on the constraining member 111, and has a plurality of detachable mounting manners, for example, one end (the first end 402) of the guiding member 400 is provided with an external thread, and the constraining member 111 is provided with an internal thread matching with the external thread, so as to implement a threaded connection; as another example, a locking hole 406 is disposed outside one end (the first end 402) of the guiding member 400, and the guiding member 400 is sleeved on the constraining member 111 and can be locked by inserting a bolt or a pin into the locking hole 406.

In a more complete solution, the constraint component 111 may also be detachably disposed on the handpiece 100 or the protective cover 101, as an example, a first component 405 is disposed at a lower end of the constraint component 111, a second component adapted to the first component 405 is disposed on a support portion of the handpiece 100 or the protective cover 101, and the first component 405 and the second component are detachably connected, as an example, the first component 405 may be an external thread disposed on the constraint component 111, and the second component is a through hole or a threaded through hole disposed on the support portion, so as to lock the constraint component 111 by using one or two nuts 115.

Example 4

The embodiment provides a sewing machine, which comprises a sewing platform 300, a supporting arm 200 arranged on the sewing platform 300 and a machine head 100 as in any one of embodiments 1 to 3, wherein the machine head 100 is rotatably arranged on the supporting arm 200, as shown in fig. 9, so that in the sewing process, the machine head 100 can be rotated at will within a range of 360 degrees to realize perfect stitches.

As shown in fig. 9, an operation screen 201 is further provided on the support arm 200 for operation.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

Claims (10)

1. A machine head is characterized in that a restraining component used for restraining a wire group is arranged on the side face of the machine head, a wire passing channel is arranged on the restraining component, and wires in the wire group are led through the wire passing channel from the upper end of the wire passing channel and out of the lower end of the wire passing channel.

2. The handpiece of claim 1, wherein the constraining member is a rod-like structure and is configured to pass through a set of wires.

3. The handpiece according to claim 1, wherein a shield is provided on an outer side of the handpiece, the shield being detachably mounted to the handpiece for covering the handpiece in a circumferential direction of rotation of the handpiece,

the constraining member is secured to the shield or handpiece.

4. The handpiece of claim 3, wherein the shield is formed by detachably splicing at least two shields, and each shield is detachably fixed to the handpiece.

5. The handpiece of claim 3, wherein the handpiece or the shield is configured with a support for supporting the cord set, the constraining member being secured to the support;

the supporting part is an accommodating groove constructed on the machine head or the protective cover, and the constraint part is fixed at the bottom of the accommodating groove and penetrates through the accommodating groove;

or, the supporting part is a supporting platform arranged on the machine head or the protective cover, and the restraining component is fixed on the supporting part and penetrates through the supporting platform or the supporting platform to be provided with a hole corresponding to the wire passing channel.

6. The handpiece of claim 5, further comprising a wire conduit detachably secured to the underside of the handpiece or the shield for guiding a wire passing out of the wire passage to a position corresponding to the wire holder.

7. The handpiece of any one of claims 1 to 6, further comprising a guide member disposed at an upper portion of the constraining member for increasing a bend radius of the wire as it enters the wire passage.

8. The handpiece of claim 7, wherein the guide member has first and second ends at opposite ends thereof, the first end having a diameter smaller than a diameter of the second end, the guide member being provided with a threading channel extending through the first and second ends, the first end being connected to the restraining member and the threading channel being in communication with the threading channel.

9. The handpiece according to claim 8, wherein the guide member is a horn-like structure,

or, the guide part is in a conical structure, and at least the threading channel at the inner side of the second end is provided with an arc transition;

or a plurality of guide rings are arranged along the direction from the second end to the first end, the diameter of each guide ring is gradually reduced along the direction from the second end to the first end, and the guide rings are connected into a whole through a plurality of connecting pieces.

10. A sewing machine comprising a sewing platform, a support arm mounted to the sewing platform, and a head as claimed in any one of claims 1 to 9, the head being rotatably mounted to the support arm.

Images