Long and short bead feeding mechanism for embroidery machine

Abstract

This invention discloses a bead feeding mechanism for an embroidery machine, comprising a base plate, a frame, a magnetic bead clamping plate, a shift fork shaft seat, a bead guide seat, and a bead changing slider. The base plate has a through groove, within which a supporting protrusion divides the groove into two sliding channels. The shift fork shaft seat rests on the supporting protrusion, and sliding arms are fixed to both sides of its bottom surface. The magnetic bead clamping plate is magnetically attached to the supporting protrusion, and its front end has a clamping jaw. The supporting protrusion has a limiting groove, and a limiting post that slides into the limiting groove is fixed to the bottom surface of the magnetic bead clamping plate. The bead changing slider includes a pad, a slider, and a connecting block. The front end of the base plate has a U-shaped notch, and the front end of the supporting protrusion has a right-angle notch. The slider is located within the U-shaped notch, and the pad is located within the right-angle notch. The rear end of the pad is fixed to the slider, and the connecting block is fixed to the slider and connected to a shifting mechanism. The bead guide seat has short bead holes and long bead holes. This invention provides precise bead feeding, stable bead clamping, and can feed two different heights of embroidery beads.

Description

Technical Field

[0001] The invention relates to the technical field of embroidery machines, in particular to a long and short bead feeding mechanism of an embroidery machine. Background Art

[0002] The bead feeding mechanism is an important component of the bead embroidery device. However, the existing bead feeding mechanism is usually only equipped with a bead clamping mechanism, that is, it can only clamp one specification of embroidery beads for feeding. For example, the Chinese patent with the authorization announcement number CN206127631U and the authorization announcement date 2017.04.26 discloses a bead embroidery machine head, including a frame, the frame is reciprocatingly connected to a driving rod through a connecting shaft, the driving rod is connected to a feeding clamp through a transmission mechanism, a support plate is fixed on the frame, the feeding clamp is slidably connected to the support plate, the feeding clamp includes a conveying part and a connecting part slidably connected to the conveying part, the conveying part is provided with a jaw, and the conveying part and the connecting part are fixedly connected by a positioning mechanism. The bead feeding mechanism has the following defects: (1) it cannot embroider two beads of different heights (long beads and short beads) at the same time during bead embroidery, which cannot meet the actual production requirements; (2) the rotating wheel contacts the side wall of the feeding clamp, and the rotating wheel applies pressure to the side wall of the feeding clamp, causing the feeding clamp to deform so that the jaws can clamp the embroidery beads. The rotating wheel will wear out after long-term use, affecting the clamping accuracy. Summary of the invention

[0003] The present invention aims to solve the above-mentioned problems existing in the bead feeding mechanism of the prior art and provides a long and short bead feeding mechanism for an embroidery machine which has a novel and compact structure, accurate bead feeding, stable bead clamping, and can clamp and feed two embroidery beads of different heights (long beads and short beads).

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a long and short bead feeding mechanism of an embroidery machine, comprising a base plate and a frame fixed on one side of the base plate, and also comprising a magnetic bead clamping plate, a fork shaft seat, a bead guide seat and a bead changing slider; a through groove is provided on the base plate along the length direction, a supporting protrusion is provided in the through groove along the length direction, and the supporting protrusion divides the through groove into two slide grooves, the fork shaft seat is placed on the supporting protrusion, and sliding arms that are slidably matched with the slide grooves are fixed on both sides of the bottom surface of the fork shaft seat; the magnetic bead clamping plate is located in front of the fork shaft seat and is magnetically adsorbed on the supporting protrusion, and a jaw for clamping embroidery beads is provided at the front end of the magnetic bead clamping plate, and the magnetic bead clamping plate can move forward and backward along the through groove under the push of the sliding arm; a limiting column is fixed on the bottom surface of the magnetic bead clamping plate, and a limiting long groove is provided on the supporting protrusion The limit column is located in the limit long groove; the bead changing slider includes a pad block, a slider and a connecting block, the front end of the bottom plate is provided with a U-shaped notch on one side close to the frame, the front end of the supporting protrusion is provided with a right-angle notch at the corner of one side close to the frame, the slider is located in the U-shaped notch, the pad block is located in the right-angle notch, the rear end of the pad block is fixed on the slider, the connecting block is fixed on the side of the slider away from the pad block, and the connecting block is connected to a toggle mechanism that pushes the connecting block to move back and forth and is fixed to the frame; the bead guide seat is located above the pad block and is fixedly connected to the connecting block, a gap is provided between the bead guide seat and the pad block for the magnetic bead clamping plate to pass through, and two bead dropping holes are provided on the bead guide seat, the bead dropping hole close to the frame is a short bead hole, and the bead dropping hole away from the frame is a long bead hole, and the pad block is located directly below the short bead hole.The shift fork shaft seat in the present invention is connected with the driving mechanism (motor) through the shift fork and the pin shaft to drive the sliding arm to move forward and backward. This structure is a conventional structure in the field, so it is not described in detail. The movement position of the magnetic bead clamping plate is accurately controlled by the cooperation of the limit column and the limit long groove, and the clamping and feeding of embroidery beads is more accurate. In the present invention, a U-shaped notch is provided on the side of the front end of the bottom plate close to the frame, and a right-angle notch is provided at the corner of the front end of the supporting protrusion close to the frame, and a bead changing slider is added. The bead changing slider includes a cushion block, a slider and a connecting block. Under the drive of the shifting mechanism, the cushion block can move left and right in the right-angle notch, and the bead guide seat and the cushion block move synchronously. When When embroidering beads with lower height (short beads), the pad is driven by the toggle mechanism to move to the left side of the right-angle notch (the pad is away from the frame), and the short bead hole is just above the opened jaws. The lower bead falls from the short bead hole, passes through the jaws and falls on the pad, while the higher bead in the long bead hole is always blocked by the magnetic bead clamping plate and will not fall. When the magnetic bead clamping plate is pushed out, the jaws clamp the middle of the lower bead and send it under the embroidery needle so that the embroidery needle can embroider the bead on the fabric; when embroidering beads with similar / same width and higher height (long beads), the pad is driven by the toggle mechanism to move to the right side of the right-angle notch (the pad The block is close to the frame), so that the long bead hole is just above the opened jaws, at this time, the high embroidery beads fall from the long bead hole, pass through the jaws and fall on the bottom plate in the right-angle notch, while the low embroidery beads in the short bead hole are always blocked by the magnetic bead clamping plate and will not fall. Due to the existence of the right-angle notch, the high embroidery beads fall deeper, so that after the magnetic bead clamping plate is pushed out, the jaws can just clamp the middle of the high embroidery beads (rather than clamping the lower part of the high embroidery beads) and send it under the embroidery needle so that the embroidery needle can embroider the embroidery beads on the fabric; the present invention is through the magnetic bead clamping plate, the right-angle notch, the bead guide seat and the cushion block Cooperating with each other, the magnetic bead clamping plate can clamp two kinds of embroidery beads with similar / identical widths and different heights, and both can be clamped in the middle of the embroidery beads, which not only realizes the clamping of embroidery beads of two different heights, but also ensures that the magnetic bead clamping plate stably clamps the embroidery beads, effectively avoiding flying beads caused by unstable clamping of the embroidery beads; the depth of the right-angle notch and the thickness of the pad can be designed according to the height of the two embroidery beads to ensure that the magnetic bead clamping plate can be clamped in the middle of the embroidery beads, but the height of the pad cannot be higher than the depth of the right-angle notch to avoid interference between the pad and the magnetic bead clamping plate; the slider is located in the U-shaped notch to avoid interference between the slider when the sliding arm moves.

[0005] Preferably, the magnetic bead clamping plate includes a bead feeding plate and a top plate, the top plate is placed on the supporting protrusion, the top plate is magnetically adsorbed on the supporting protrusion by a permanent magnet fixed to the bottom surface of the top plate, the limiting column is fixed to the bottom surface of the top plate, the rear end of the top plate is fixedly connected to the bead feeding plate, connecting side plates are provided on both sides of the top plate, the rear end of the connecting side plates is fixedly connected to the bead feeding plate, the gap between the connecting side plates and the top plate forms an assembly notch, an elastic bead clamping arm is provided in the assembly notch, the front end end of the elastic bead clamping arm extends to the front of the top plate to form a bead clamping head, and the relative concave surfaces on the bead clamping head form a jaw.

[0006] Preferably, the elastic bead clamping arm includes a U-shaped arm body and a transition section, the U-shaped arm body is located in the assembly notch, the end of the outer arm of the U-shaped arm body is fixedly connected to the connecting side plate, the end of the inner arm of the U-shaped arm body is fixedly connected to the transition section, and there is a gap between the U-shaped arm body and the top plate and the connecting side plate, and the gap forms a deformation seam; the free end of the transition section extends to the front of the top plate to form a bead clamping head.

[0007] Preferably, the U-shaped arm body, transition section, bead clamping head, top plate, connecting side plate and bead feeding plate are of a homogeneous integrated structure.

[0008] Preferably, a guide notch inclined outward is provided at a position near the bead clamping head on the transition section, and a push column is provided on the sliding arm. The push column is located in the guide notch, and a blocking slope that can block and interfere with the push column is provided on the side of the opening of the guide notch near the bead clamping head. In the present invention, the damping effect between the top plate and the sliding arm is utilized through the mutual cooperation among the permanent magnet, the guide notch, the blocking slope and the push column to realize the contraction and expansion of the elastic bead clamping arm. The structure is very simple, small in size and good in stability. The principle is as follows: during the sliding of the sliding arm, since the magnetic bead clamping plate is magnetically attracted to the supporting protrusion (there is a damping effect), the sliding arm moves forward before the magnetic bead clamping plate, and the push column on the sliding arm moves forward along the guide notch. During the movement, the push column gradually squeezes the transition section inward, thereby making the U-shaped arm body The inner arm in the middle gradually approaches the top plate, and the jaws gradually close to gradually clamp the embroidery beads. When the push column moves to the blocking slope, due to the blocking interference of the blocking slope, the push column cannot continue to move forward along the guide notch. At this time, the thrust of the push column on the blocking slope overcomes the magnetic attraction force between the permanent magnet and the supporting protrusion. The push column will push the magnetic elastic bead clamping plate with the embroidery beads to move forward synchronously. When the limit column moves to the front end of the limit long hole and blocks and interferes with the supporting protrusion, the embroidery beads are just delivered to the corresponding embroidery needle, and the jaws are The embroidery beads are tightly clamped, and the embroidery needle sews the embroidery beads on the fabric; after the embroidery beads are sewn on the fabric, the fork shaft seat moves backward, and because the magnetic bead clamping plate is magnetically attracted to the supporting protrusion (there is a damping effect), the sliding arm moves backward before the magnetic bead clamping plate, and at the same time, the push column on the sliding arm breaks away from the blocking inclined surface and moves backward along the guide notch, and gradually squeezes the transition section outward along the guide notch, so that the inner arm in the U-shaped arm body gradually expands outward, the jaws gradually open and release the embroidery beads, and when the push column moves to the bottom of the guide notch, the jaws are in a fully open state. The column cannot continue to move backward along the guide notch, and the push column interferes with the transition section so that the force of the push column on the elastic bead clamping arm overcomes the magnetic attraction force between the permanent magnet and the supporting protrusion. The push column will push the magnetic elastic bead clamping plate to move backward synchronously to make the jaws leave the embroidery beads. When the limit column moves to the rear end of the limit long hole and interferes with the supporting protrusion, the jaws are fully opened and re-positioned under the corresponding bead dropping hole on the bead guide seat. The embroidery beads fall into the jaws through the bead dropping hole. Repeating the above steps can continuously complete the process of sending and clamping beads.

[0009] Preferably, the width of the transition section is greater than the width of the assembly notch, and a limiting shoulder is formed at the connection between the transition section and the inner arm of the U-shaped arm body, which can block and interfere with the connecting side plate. When the inner arm of the U-shaped arm body expands outward to a certain distance, the limiting shoulder interferes with the connecting side plate, and the connecting side plate prevents the inner arm of the U-shaped arm body from continuing to expand outward, thereby preventing the U-shaped arm body from deforming due to excessive force, affecting the accuracy of bead clamping; and at the same time, ensuring the consistency of the jaw opening size.

[0010] Preferably, the height of the supporting protrusion is lower than the depth of the through groove.

[0011] Preferably, the thickness of the cushion block is less than or equal to the depth of the right-angle notch.

[0012] Preferably, the shifting mechanism includes a motor seat, a motor and a guide rod, the motor seat is fixed on the outside of the frame, the motor is fixed on the motor seat, two guide rod seats are arranged opposite to each other on the motor seat, the guide rod passes through the guide rod seat and is slidably connected with the guide rod seat, the motor shaft of the motor is connected to the guide rod by a bead changing fork, a connecting plate is fixed at one end of the guide rod close to the frame, and the connecting block and the guide bead seat are respectively fixed on both sides of the connecting plate.

[0013] Preferably, a toggle block is fixed on the guide rod, the toggle rod of the bead changing fork is fixedly connected to the motor shaft of the motor, the toggle foot of the bead changing fork is rotatably connected to the toggle block through a pin shaft, and limit rods are provided on the motor seat at positions on both sides of the toggle block.

[0014] Therefore, the present invention has the following beneficial effects:

[0015] (1) Through the mutual cooperation between the magnetic bead clamping plate, the right-angle notch, the bead guide seat and the cushion block, the magnetic bead clamping plate can clamp two kinds of embroidery beads of similar / same width and different heights, and both can be clamped in the middle of the embroidery beads. Not only can the use of a magnetic bead clamping plate (on an embroidery machine head) to clamp two kinds of embroidery beads of different heights be achieved, the structure is compact and conducive to saving installation space, but also the magnetic bead clamping plate can stably clamp the embroidery beads, effectively avoiding the flying beads caused by unstable clamping of the embroidery beads;

[0016] (2) Through the mutual cooperation among the permanent magnet, the guide notch, the blocking slope and the push column, the damping effect between the top plate and the sliding arm is utilized to realize the contraction and expansion of the elastic bead clamping arm. The structure is very simple and has good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is an assembly diagram of a shift fork shaft seat, a sliding arm, a bottom plate, a magnetic bead clamping plate and a bead changing slider.

[0019] Figure 3 yes Figure 2 An exploded diagram of .

[0020] Figure 4 It is an axial view of a magnetic bead plate.

[0021] Figure 5 This is a front view of the bead changing slider.

[0022] Figure 6 It is a front view of the base plate.

[0023] In the figure: bottom plate 1, frame 2, fork shaft seat 3, guide bead seat 4, supporting protrusion 5, slide groove 6, slide arm 7, jaw 8, limit column 9, limit long groove 10, cushion block 11, slider 12, connecting block 13, U-shaped notch 14, right-angle notch 15, short bead hole 16, long bead hole 17, bead feeding plate 18, top plate 19, permanent magnet 20, connecting side plate 21, assembly notch 22, bead clamping head 23, U-shaped arm body 24, transition section 25, deformation seam 26, guide notch 27, push column 28, blocking inclined surface 29, limit shoulder 30, motor seat 31, motor 32, guide rod 33, guide rod seat 34, bead changing fork 35, connecting plate 36, toggle block 37, limit rod 38. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1 , Figure 2 , Figure 3 The illustrated embodiment of the long and short bead feeding mechanism of an embroidery machine comprises a bottom plate 1 and a frame 2 fixed to one side of the bottom plate, a magnetic bead clamping plate, a fork shaft seat 3, a bead guide seat 4 and a bead changing slider; a through groove is provided on the bottom plate along the length direction, and a supporting protrusion 5 is formed in the through groove along the length direction, and the height of the supporting protrusion is lower than the depth of the through groove, and the supporting protrusion divides the through groove into two slide grooves 6, and the fork shaft seat is placed on the supporting protrusion, and sliding arms 7 that are slidably matched with the slide grooves are fixed on both sides of the bottom surface of the fork shaft seat; the magnetic bead clamping plate comprises a bead feeding plate 18 and a top plate 19, the bead feeding plate is located in front of the fork shaft seat, and the rear end of the top plate is fixedly connected to the bead feeding plate, and the top plate is magnetically adsorbed on the supporting protrusion by a permanent magnet 20 fixed to the bottom surface of the top plate (such as Figure 4As shown in the figure, a limiting column 9 is fixed to the bottom surface of the top plate, and a limiting long groove 10 is provided on the supporting protrusion. The limiting column is slidably fitted in the limiting long groove. Connecting side plates 21 are fixed on both sides of the top plate. The rear end of the connecting side plate is fixedly connected to the bead feeding plate. The gap between the connecting side plate and the top plate forms an assembly notch 22. An elastic bead clamping arm is installed in the assembly notch. The elastic bead clamping arm includes a U-shaped arm body 24 and a transition section 25. The U-shaped arm body is located in the assembly notch. The end of the outer arm in the U-shaped arm body is fixedly connected to the connecting side plate, and the end of the inner arm in the U-shaped arm body is fixedly connected to the transition section. Gaps are provided between the U-shaped arm body and the top plate and the connecting side plate. The gap forms a deformation seam 26; the width of the transition section is greater than the width of the assembly notch. Width, the transition section and the inner arm of the U-shaped arm body are connected to form a limiting shoulder 30 that can block and interfere with the connecting side plate, the free end of the transition section extends to the front of the top plate to form a bead clamping head 23, and the transition section is provided with a guide notch 27 inclined outward near the bead clamping head, and the sliding arm is provided with a push column 28, which is located in the guide notch, and the side of the guide notch opening near the bead clamping head is provided with a blocking inclined surface 29 that can block and interfere with the push column, and the opposite concave surface on the bead clamping head forms a jaw 8 for clamping embroidery beads, and the U-shaped arm body, transition section, bead clamping head, top plate, connecting side plate and bead feeding plate are of a homogeneous integrated structure; the bead changing slider includes a cushion block 11, a slider 12 and a connecting block 13 (such as Figure 5 As shown, a U-shaped notch 14 is provided on the front side of the bottom plate near the frame (as shown in FIG. Figure 6 As shown in the figure, a right-angle notch 15 is provided at the corner of one side of the frame near the front end of the supporting protrusion, the slider is located in the U-shaped notch, the pad is located in the right-angle notch and the thickness of the pad is equal to the depth of the right-angle notch, the rear end of the pad is fixed on the slider, the connecting block is fixed on the side of the slider away from the pad, the pad, the slider and the connecting block are a homogeneous integral structure, the connecting block is connected to a toggle mechanism that pushes the connecting block to move back and forth and is fixed to the frame, the toggle mechanism includes a motor seat 31, a motor 32 and a guide rod 33, the motor seat is fixed on the outside of the frame, the motor is fixed on the motor seat, two guide rod seats 34 are relatively fixed on the motor seat, the guide rod passes through the guide rod seat and is slidably connected to the guide rod seat, the motor The motor shaft and the guide rod are connected through a bead changing fork 35 and a toggle block 37 fixed on the guide rod, the toggle rod of the bead changing fork is fixedly connected to the motor shaft of the motor, the toggle foot of the bead changing fork is rotatably connected to the toggle block through a pin shaft, and a limit rod 38 is fixed at positions on both sides of the toggle block on the motor seat, a connecting plate 36 is fixed at one end of the guide rod close to the frame, the connecting block and the bead guide seat are respectively fixed on both sides of the connecting plate, the bead guide seat is located above the cushion block, and a gap is provided between the bead guide seat and the cushion block for the magnetic bead clamping plate to pass through, the bead guide seat is provided with two bead dropping holes, the bead dropping hole close to the frame is a short bead hole 16, and the bead dropping hole away from the frame is a long bead hole 17, and the cushion block is located directly below the short bead hole.

[0026] The operation process of the present invention is as follows: when embroidering beads with a relatively low height (short beads), the cushion block is driven by the toggle mechanism to move to the left side of the right-angle notch (the cushion block is away from the frame). At this time, the short bead hole is just above the opened jaws, and the embroidery beads with a relatively low height (short beads) fall from the short bead hole, pass through the jaws and fall on the cushion block, while the embroidery beads with a relatively high height in the long bead hole are always blocked by the magnetic bead clamping plate and will not fall. The shift fork shaft seat drives the sliding arm to slide forward. During the sliding process of the sliding arm, the top plate in the magnetic bead clamping plate is magnetically adsorbed on the supporting protrusion under the action of the permanent magnet (there is a damping effect), so that the sliding arm precedes the magnetic bead clamping plate. The bead clamping plate moves forward, and the push column on the sliding arm first moves forward along the guide notch (the magnetic bead clamping plate does not move). During the movement, the push column gradually squeezes the transition section inward, so that the inner arm in the U-shaped arm body gradually approaches the top plate, and the jaws gradually close to gradually clamp the embroidery beads. When the push column moves to the blocking slope, the push column cannot continue to move forward along the guide notch due to the blocking interference of the blocking slope. At this time, the thrust of the push column acting on the blocking slope overcomes the magnetic attraction force between the permanent magnet and the supporting protrusion, and the push column will push the magnetic elastic bead clamping plate with the embroidery beads to move forward synchronously. When the limit column moves to When the front end of the limiting long hole and the supporting protrusion are blocked and interfered, the embroidery beads are just delivered to the corresponding embroidery needle, and the jaws tightly clamp the embroidery beads, and the embroidery needle sews the embroidery beads on the fabric; after the embroidery beads are sewn on the fabric, the fork shaft seat moves backward, and because the magnetic bead clamping plate is magnetically attracted to the supporting protrusion (there is a damping effect), the sliding arm moves backward before the magnetic bead clamping plate (magnetic bead clamping plate), and at the same time, the pushing column on the sliding arm breaks away from the blocking inclined surface and moves backward along the guide notch, and gradually squeezes outward along the guide notch to the transition section, so that the inner arm in the U-shaped arm body gradually expands outward, the jaws gradually open and release the embroidery beads, and the pushing column moves to When the limit column moves to the rear end of the limit long hole and interferes with the supporting protrusion, the jaws are fully opened and re-positioned under the corresponding bead dropping hole on the bead guide seat. The embroidery beads fall into the jaws through the bead dropping hole. The above steps can be repeated to continuously complete the process of delivering and clamping beads.

[0027] When embroidering beads (long beads) of similar / same width and higher height, the pad is driven by the toggle mechanism to move to the right side of the right-angle notch (the pad is close to the frame), so that the long bead hole is located directly above the open jaws. At this time, the higher bead falls from the long bead hole, passes through the jaws and falls on the bottom plate in the right-angle notch, while the lower bead in the short bead hole is always blocked by the magnetic bead clamping plate and will not fall. Due to the existence of the right-angle notch, the higher bead falls deeper, so that after the magnetic bead clamping plate is pushed out, the jaws can just clamp the middle of the higher bead (instead of clamping the lower part of the higher bead). The clamping and delivery process of the higher bead is the same as that of the lower bead, so it is not repeated.

[0028] Through the cooperation between the bead changing slider and the toggle mechanism, the process of clamping and delivering two different specifications of embroidery beads with similar / same width and different heights can be realized on a magnetic bead clamping plate (an embroidery machine head). The structure is very simple and compact, which is conducive to saving installation space.

[0029] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A long and short bead feeding mechanism for an embroidery machine, comprising a base plate (1) and a frame (2) fixed to one side of the base plate, characterized in that: It also includes a magnetic bead clamping plate, a fork shaft seat (3), a bead guide seat (4) and a bead changing slider; the bottom plate is provided with a through groove along the length direction, and a supporting protrusion (5) is provided in the through groove along the length direction. The height of the supporting protrusion is lower than the depth of the through groove, and the supporting protrusion divides the through groove into two slide grooves (6). The fork shaft seat is placed on the supporting protrusion, and sliding arms (7) that are slidably matched with the slide grooves are fixed on both sides of the bottom surface of the fork shaft seat; the magnetic bead clamping plate is located in front of the fork shaft seat and is magnetically adsorbed on the supporting protrusion, and the front end of the magnetic bead clamping plate is provided with a jaw (8) for clamping and placing embroidery beads. The magnetic bead clamping plate can move forward and backward along the through groove under the push of the sliding arm; a limiting column (9) is fixed on the bottom surface of the magnetic bead clamping plate, and a limiting long groove (10) is provided on the supporting protrusion, and the limiting column is located in the limiting long groove; the bead changing slider includes a cushion block (11), a slider (12) and a connecting block (13), and a U-shaped The U-shaped notch (14) is provided at a right angle notch (15) at the corner of one side of the frame on the front end of the supporting protrusion, the slider is located in the U-shaped notch, the cushion block is located in the right angle notch, the thickness of the cushion block is less than or equal to the depth of the right angle notch, the rear end of the cushion block is fixed on the slider, the connecting block is fixed on the side of the slider away from the cushion block, and the connecting block is connected to a toggle mechanism that pushes the connecting block to move back and forth and is fixed on the frame; the bead guide seat is located above the cushion block and is fixedly connected to the connecting block, a gap is provided between the bead guide seat and the cushion block for the magnetic bead clamping plate to pass through, and two bead dropping holes are provided on the bead guide seat, the bead dropping hole close to the frame is a short bead hole (16), and the bead dropping hole away from the frame is a long bead hole (17), and the cushion block is located directly below the short bead hole.

2. The long and short bead feeding mechanism of an embroidery machine according to claim 1, characterized in that: The magnetic bead clamping plate comprises a bead feeding plate (18) and a top plate (19), wherein the top plate is placed on a supporting protrusion, and the top plate is magnetically adsorbed on the supporting protrusion by a permanent magnet (20) fixed to the bottom surface of the top plate, the limiting column is fixed to the bottom surface of the top plate, the rear end of the top plate is fixedly connected to the bead feeding plate, connecting side plates (21) are provided on both sides of the top plate, the rear end of the connecting side plates is fixedly connected to the bead feeding plate, and the gap between the connecting side plates and the top plate forms an assembly notch (22), and an elastic bead clamping arm is provided in the assembly notch, and the front end of the elastic bead clamping arm extends to the front of the top plate to form a bead clamping head (23), and the opposite concave surfaces on the bead clamping head form a jaw.

3. The long and short bead feeding mechanism of an embroidery machine according to claim 2, characterized in that: The elastic bead clamping arm comprises a U-shaped arm body (24) and a transition section (25), wherein the U-shaped arm body is located in the assembly notch, the end of the outer arm of the U-shaped arm body is fixedly connected to the connecting side plate, the end of the inner arm of the U-shaped arm body is fixedly connected to the transition section, and gaps are provided between the U-shaped arm body and the top plate and the connecting side plate, the gaps forming a deformation gap (26); the free end of the transition section extends to the front of the top plate to form a bead clamping head.

4. The long and short bead feeding mechanism of an embroidery machine according to claim 3, characterized in that: The U-shaped arm body, transition section, bead clamping head, top plate, connecting side plate and bead feeding plate are of homogeneous integrated structure.

5. The long and short bead feeding mechanism of an embroidery machine according to claim 3, characterized in that: An outwardly inclined guide notch (27) is provided on the transition section at a position close to the bead clamping head, a push column (28) is provided on the slide arm, the push column is located in the guide notch, and a blocking inclined surface (29) capable of blocking and interfering with the push column is provided on one side of the guide notch opening close to the bead clamping head.

6. The long and short bead feeding mechanism of an embroidery machine according to claim 3, characterized in that: The width of the transition section is greater than the width of the assembly notch, and a limiting shoulder (30) is formed at the connection between the transition section and the inner arm of the U-shaped arm body, which can block and interfere with the connecting side plate.

7. The long and short bead feeding mechanism of an embroidery machine according to claim 1, characterized in that: The shifting mechanism comprises a motor seat (31), a motor (32) and a guide rod (33), wherein the motor seat is fixed on the outside of the frame, the motor is fixed on the motor seat, two guide rod seats (34) are arranged on the motor seat in opposition to each other, the guide rod passes through the guide rod seats and is slidably connected to the guide rod seats, the motor shaft of the motor and the guide rod are connected via a bead changing fork (35), a connecting plate (36) is fixed on one end of the guide rod close to the frame, and the connecting block and the guide bead seat are respectively fixed on both sides of the connecting plate.

8. The long and short bead feeding mechanism of an embroidery machine according to claim 7, characterized in that: A toggle block (37) is fixed on the guide rod, the toggle rod of the bead changing fork is fixedly connected to the motor shaft of the motor, the toggle foot of the bead changing fork is rotatably connected to the toggle block via a pin, and limit rods (38) are provided on the motor seat at positions on both sides of the toggle block.

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