A device for freely adjusting the size of inner frame of embroidery machine

Abstract

The utility model discloses a device for freely adjusting the size of an inner frame of an embroidery machine, comprising a front stop, a left stop, a right stop, a rear stop and an extended stop, wherein the left stop is fixedly connected to the left side of the front stop, the right stop is fixedly connected to the right side of the front stop, the rear stop is fixedly connected to the rear sides of the left stop and the right stop, the extended stop is arranged on both sides of the rear stop, and the top of the rear stop is movably connected with an adjustment mechanism. The utility model provides an adjustment mechanism, through which the rear stop can be moved forward and backward to adjust and control the size of the inner frame, which can reduce manual operation when adjusting the size, and can be more labor-saving when in use, solving the problem that the two ends of the extended stop of the embroidery frame of the existing embroidery machine are fastened to the porous long steel plate with bolts, and the fastening and shifting can be achieved by loosening the fastening bolts at both ends, manually shifting, and then re-tightening the bolts. This fastening and shifting method is time-consuming and labor-intensive, which hinders the improvement of the production efficiency of the embroidery machine.

Description

Technical Field

[0001] The utility model relates to the technical field of embroidery machines, in particular to a device for freely adjusting the size of an inner frame of an embroidery machine. Background Art

[0002] Embroidery machine, from the literal meaning, I think everyone should understand, embroidery machine, embroidery machine, or embroidery machinery. When embroidery first started to break away from hand embroidery, the so-called embroidery machine at that time was not a real embroidery machine, because the embroidery machine at that time was a traditional sewing machine, replaced with a bottom plate with small round holes, the sewing machine needle kept going up and down, plus the hand-held embroidery frame stretched the cloth back and forth. In fact, this so-called embroidery machine is still a kind of hand embroidery. The inner frame of the embroidery machine needs to be manually adjusted during operation to facilitate embroidery.

[0003] The two ends of the existing embroidery machine frame extension are fastened to the porous long steel plate with bolts, and the fastening and displacement can be achieved by loosening the fastening bolts at both ends, manually shifting, and then re-tightening the bolts. This fastening and displacement method is time-consuming and labor-intensive, which hinders the improvement of the production efficiency of the embroidery machine and hinders the promotion of production automation and efficiency. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the purpose of the utility model is to provide a device for freely adjusting the size of the inner frame of an embroidery machine, which has the advantage of convenient adjustment and solves the problem that the two ends of the embroidery frame extension of the existing embroidery machine are fastened to the porous long steel plate with bolts, and the fastening and shifting can be achieved by loosening the fastening bolts at both ends, manually shifting, and then re-tightening the bolts. This fastening and shifting method is time-consuming and labor-intensive, which hinders the improvement of the production efficiency of the embroidery machine and hinders the promotion of production automation and efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a front gear, a left gear, a right gear, a rear gear and an extended gear, the left gear is fixedly connected to the left side of the front gear, the right gear is fixedly connected to the right side of the front gear, the rear gear is fixedly connected to the rear sides of the left gear and the right gear, the extended gear is arranged on both sides of the rear gear, and the top of the rear gear is movably connected with an adjustment mechanism.

[0006] As a preferred embodiment of the utility model, the adjusting mechanism includes a motor support seat, the motor support seat is movably connected to the top of the rear gear, the inner wall of the motor support seat is fixedly connected to a screw-type advance motor, the motor support seat is fixedly connected to the rear gear through screws, the inner wall of the screw-type advance motor is threadedly connected to a screw, the other end of the screw is sleeved with a screw support seat, and the screw support seat is fixedly connected to the top of the extension gear through screws.

[0007] As a preferred embodiment of the utility model, thrust ball bearings are fixedly connected to both sides of the inner wall of the screw support seat, the inner ring of the thrust ball bearing is fixedly connected to the surface of the screw, the front side of the screw is threadedly connected to a hexagon socket screw, and the surface of the hexagon socket screw is covered with an end cover.

[0008] As a preferred embodiment of the utility model, the bottom of the motor support seat and the bottom of the screw support seat are fixedly connected with a pad, the inner wall of the screw support seat is fixedly connected with a deep groove ball bearing, and the inner ring of the deep groove ball bearing is fixedly connected to the surface of the screw.

[0009] As a preferred embodiment of the utility model, an optical axis support seat is provided at the top of the rear gear, and there are a plurality of optical axis support seats, which are equidistantly distributed. A linear bearing is fixedly connected to the inner wall of the optical axis support seat, and an optical axis fixing seat is provided at the top of the extended gear, and there are a plurality of optical axis fixing seats, which are equidistantly distributed.

[0010] As a preferred embodiment of the utility model, a chrome-plated optical axis is fixedly connected to the inner wall of the optical axis fixing seat, one end of the chrome-plated optical axis is movably connected to the inner wall of the linear bearing, the bottom of the optical axis support seat is fixedly connected to the optical axis support seat gasket, the optical axis support seat is fixedly connected to the rear stop by screws, the bottom of the optical axis fixing seat is fixedly connected to the optical axis fixing seat gasket, and the optical axis fixing seat is fixedly connected to the extension stop by screws.

[0011] As a preferred embodiment of the present invention, the top of the left stopper and the top of the right stopper are both fixedly connected to a guide rail, and the top of the guide rail is movably connected to a slider.

[0012] As a preferred embodiment of the utility model, the top of the slider is fixedly connected with a clamp frame Z-shaped plate, one side of the clamp frame Z-shaped plate is fixedly connected to the two sides of the top of the extension gear by screws, the rear side of the slider is fixedly connected with a stop block, and the rear side of the stop block is fixedly connected with a buffer.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model sets an adjustment mechanism, through which the rear gear can be moved forward and backward to adjust the size of the inner frame, which can reduce manual operation when adjusting the size, and can be more labor-saving when using. It solves the problem that the two ends of the existing embroidery machine embroidery frame extension gear are fastened to the multi-hole long steel plate with bolts, and can be fastened and shifted by loosening the fastening bolts at both ends, manually shifting, and then re-tightening the bolts. This fastening and shifting method is time-consuming and labor-intensive, which hinders the improvement of the production efficiency of the embroidery machine and the promotion of production automation and efficiency. It has the advantage of convenient adjustment.

[0015] 2. The utility model is provided with an adjustment mechanism. When in use, the motor support seat is fixed on the rear gear by rotating the screw, and then the lead screw motor is fixed through the motor support seat, and then the lead screw support seat and the extension gear are fixed by rotating the screw, and the other end of the lead screw is supported by the lead screw support seat. A lead screw motor is installed at the center of the rear gear and the extension gear as the extension gear for automatic shifting. The force of the extension gear is balanced when it is automatically shifted. The lead screw motor is fastened to the rear gear of the embroidery frame by bolts, and the lead screw support seat is fastened to the extension gear by bolts. When the embroidery frame moves under the control of the microcomputer, the extension gear automatic shifting device and the extension gear can move synchronously with the embroidery frame on the embroidery frame. When the microcomputer controls the motor to work, it drives the lead screw to rotate and move along the axis direction of the lead screw motor. When the speed of the lead screw motor is revolutions per minute, the speed of the lead screw moving along the axis direction of the motor is about. meters per minute (lead of the lead screw. mm), and the axial push (pull) force of the lead screw is about N. In this way, the forward and backward displacement of the extension gear is achieved through the axial push (pull) action of the lead screw.

[0016] 3. The utility model is provided with a thrust ball bearing, a hexagon socket screw and an end cover. When the hexagon socket is rotated, the hexagon socket screw drives the end cover to approach the screw rod and to fit tightly with one end of the screw rod. The end cover is fixed to the screw rod by the hexagon socket screw. The screw rod is limited by the end cover to prevent the screw rod from being separated from the screw rod support seat. Then, the thrust ball bearing can keep the screw rod smooth when the screw rod rotates, thereby reducing the friction force when the screw rod rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0019] Figure 3 The utility model is Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 This utility model is a schematic diagram of the screw rod structure from a top view;

[0021] Figure 5 The utility model is a schematic diagram of the cross-sectional structure of a screw rod;

[0022] Figure 6 The utility model is Figure 5 The enlarged structural diagram at B in the middle;

[0023] Figure 7 This is a schematic diagram of the top view of the chrome-plated optical axis of the utility model;

[0024] Figure 8 It is a schematic diagram of the cross-sectional structure of the chrome-plated optical axis of the utility model.

[0025] In the figure: 1. front gear; 2. left gear; 3. right gear; 4. rear gear; 5. extension gear; 6. adjustment mechanism; 61. motor support seat; 62. screw advance motor; 63. screw; 64. screw support seat; 7. thrust ball bearing; 8. hexagon socket screw; 9. end cover; 10. pad; 11. deep groove ball bearing; 12. optical axis support seat; 13. linear bearing; 14. optical axis fixing seat; 15. chrome-plated optical axis; 16. optical axis support seat gasket; 17. optical axis fixing seat gasket; 18. guide rail; 19. slider; 20. framed Z-shaped plate; 21. block; 22. buffer. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figures 1 to 8 As shown, the utility model provides a front gear 1, a left gear 2, a right gear 3, a rear gear 4 and an extended gear 5. The left gear 2 is fixedly connected to the left side of the front gear 1, the right gear 3 is fixedly connected to the right side of the front gear 1, the rear gear 4 is fixedly connected to the rear sides of the left gear 2 and the right gear 3, the extended gear 5 is arranged on both sides of the rear gear 4, and the top of the rear gear 4 is movably connected with an adjustment mechanism 6.

[0028] refer to Figure 3 The adjusting mechanism 6 includes a motor support seat 61, which is movably connected to the top of the rear gear 4. The inner wall of the motor support seat 61 is fixedly connected with a screw advancement motor 62. The motor support seat 61 is fixedly connected to the rear gear 4 through screws. The inner wall of the screw advancement motor 62 is threadedly connected with a screw 63. The other end of the screw 63 is sleeved with a screw support seat 64, and the screw support seat 64 is fixedly connected to the top of the extension gear 5 through screws.

[0029] As a technical optimization scheme of the utility model, by setting the adjustment mechanism 6, the motor support seat 61 is fixed to the rear gear 4 by rotating the screw when in use, and then the screw advance motor 62 is fixed by the motor support seat 61, and then the screw support seat 64 is fixed to the extension gear 5 by rotating the screw, and the other end of the screw is supported by the screw support seat 64, and the screw advance motor 62 is installed in the middle position between the rear gear 4 and the extension gear 5 as the extension gear 5 automatically shifts, and the extension gear 5 is automatically shifted. The force is balanced, and the screw advance motor 62 is fastened to the rear gear 4 of the embroidery frame by bolts, and the screw support The seat 64 is fastened to the extension gear 5 by bolts. When the microcomputer controls the movement of the embroidery frame, the automatic shifting device of the extension gear 5 and the extension gear 5 can move synchronously with the embroidery frame on the embroidery frame. When the microcomputer controls the motor to work, the screw rod 63 is driven to rotate and move along the axis direction of the screw rod advancing motor 62. When the speed of the screw rod advancing motor 62 is 240 revolutions per minute, the speed of the screw rod 63 moving along the axis direction of the motor is about 1.5 meters per minute, and the lead of the screw rod 63 is 6.35mm. At the same time, the axial push-pull force of the screw rod 63 is about 750N. In this way, the forward and backward displacement of the extension gear 5 is achieved through the axial push-pull action of the screw rod 63.

[0030] refer to Figure 6 Thrust ball bearings 7 are fixedly connected to both sides of the inner wall of the screw support seat 64, the inner ring of the thrust ball bearing 7 is fixedly connected to the surface of the screw 63, the front side of the screw 63 is threadedly connected to a hexagon socket screw 8, and the surface of the hexagon socket screw 8 is sleeved with an end cover 9.

[0031] As a technical optimization scheme of the utility model, a thrust ball bearing 7, a hexagon socket screw 8 and an end cover 9 are arranged, and the end cover 9 is driven to approach the screw rod 63 and to be tightly attached to one end of the screw rod 63 by rotating the hexagon socket screw 8, and the end cover 9 is fixed to the screw rod 63 by the hexagon socket screw 8, and the screw rod 63 is limited by the end cover 9 to prevent the screw rod 63 from being separated from the screw rod support seat 64, and then the thrust ball bearing 7 can keep the screw rod 63 smooth when the screw rod 63 rotates, thereby reducing the friction force of the screw rod 63 when it rotates.

[0032] refer to Figure 4 The bottom of the motor support seat 61 and the bottom of the screw support seat 64 are fixedly connected with a pad 10, the inner wall of the screw support seat 64 is fixedly connected with a deep groove ball bearing 11, and the inner ring of the deep groove ball bearing 11 is fixedly connected to the surface of the screw 63.

[0033] As a technical optimization scheme of the utility model, by setting a pad 10 and a deep groove ball bearing 11, a pad 10 is respectively provided at the bottom of the motor support seat 61 and the screw support seat 64. The setting of the pad 10 is conducive to the leveling of the screw 63 when the screw advancement motor 62 is installed, ensuring the smooth movement of the screw 63 system. A deep groove ball bearing 11 and two thrust ball bearings 7 are installed at the supporting end of the screw 63. The deep groove ball bearing 11 can support the smooth rotational movement of the screw 63. The thrust ball bearing 7 can ensure that the screw 63 itself will not have uncontrollable axial jump during the process of pushing and pulling the extension gear 5 component forward and backward.

[0034] refer to Figure 7 An optical axis support seat 12 is arranged at the top of the rear gear 4, and there are several optical axis support seats 12, and the several optical axis support seats 12 are distributed at equal distances. A linear bearing 13 is fixedly connected to the inner wall of the optical axis support seat 12, and an optical axis fixing seat 14 is arranged at the top of the extended gear 5, and there are several optical axis fixing seats 14, and the several optical axis fixing seats 14 are distributed at equal distances.

[0035] As a technical optimization scheme of the utility model, an optical axis support seat 12, a linear bearing 13 and an optical axis fixing seat 14 are set, the chrome-plated optical axis 15 is fixed by the optical axis fixing seat 14, and then the linear bearing 13 is fixed by the optical axis support seat 12, the chrome-plated optical axis 15 is limited and supported by the linear bearing 13, and then when the rear gear 4 moves, the friction of the optical axis support seat 12 can be reduced by the linear bearing 13, so that it can be more stable when used.

[0036] refer to Figure 8 The inner wall of the optical axis fixing seat 14 is fixedly connected with a chrome-plated optical axis 15, one end of the chrome-plated optical axis 15 is movably connected to the inner wall of the linear bearing 13, the bottom of the optical axis support seat 12 is fixedly connected with an optical axis support seat gasket 16, the optical axis support seat 12 is fixedly connected to the rear stop 4 by screws, the bottom of the optical axis fixing seat 14 is fixedly connected with an optical axis fixing seat gasket 17, and the optical axis fixing seat 14 is fixedly connected to the extension stop 5 by screws.

[0037] As a technical optimization scheme of the utility model, by setting the chrome-plated optical axis 15, the optical axis support seat gasket 16 and the optical axis fixing seat gasket 17, the optical axis support seat gasket 16 and the optical axis fixing seat gasket 17 are used to facilitate the leveling of the chrome-plated optical axis 15 during installation, thereby ensuring smooth movement of the chrome-plated optical axis 15.

[0038] refer to Figure 2 The top of the left stopper 2 and the top of the right stopper 3 are both fixedly connected with a guide rail 18 , and the top of the guide rail 18 is movably connected with a slider 19 .

[0039] As a technical optimization solution of the utility model, by setting the guide rails 18 and the sliders 19, the two ends of the extension rail 5 are respectively fixed on the sliders 19 of the two groups of guide rails 18 through two clamping frame Z-shaped plates 20, and the two groups of guide rails 18 components are arranged symmetrically.

[0040] refer to Figure 2 The top of the slider 19 is fixedly connected with a clamp frame Z-shaped plate 20, one side of the clamp frame Z-shaped plate 20 is fixedly connected to the two sides of the top of the extension bar 5 by screws, the rear side of the slider 19 is fixedly connected with a stopper 21, and the rear side of the stopper 21 is fixedly connected with a buffer 22.

[0041] As a technical optimization solution of the utility model, by setting the clamp frame Z-plate 20, the block 21 and the buffer 22, one end of the slider 19 is installed with the block 21 and the buffer 22 as the limit limit of the movement of the extension gear 5, ensuring that the screw rod 63 will not move beyond the limit and even disengage from the screw rod advance motor 62.

[0042] The working principle and use process of the utility model are as follows: when in use, the motor support seat 61 is fixed to the rear gear 4 by rotating the screw, and then the screw advance motor 62 is fixed by the motor support seat 61, and then the screw support seat 64 is fixed to the extension gear 5 by rotating the screw, and the other end of the screw is supported by the screw support seat 64, and the screw advance motor 62 is installed at the center position of the rear gear 4 and the extension gear 5 as the extension gear 5 automatically shifts, and the extension gear 5 is automatically shifted. The force is balanced, the screw advance motor 62 is fastened to the rear gear 4 of the embroidery frame by bolts, and the screw support seat 64 is fastened to the extension gear 5 by bolts. When the microcomputer controls the movement of the embroidery frame, the automatic shifting device of the extension gear 5 and the extension gear 5 can move synchronously with the embroidery frame on the embroidery frame. When the microcomputer controls the motor to work, it drives the screw 63 to rotate and move along the axis of the screw motor 62. When the speed of the screw motor 62 is 240 revolutions per minute, the speed of the screw 63 moving along the axis of the motor is about 1.5 meters per minute, the lead of the screw 63 is 6.35mm, and the axial push-pull force of the screw 63 is about 750N. In this way, the forward and backward displacement of the extension gear 5 is achieved through the axial push-pull action of the screw 63. The end cover 9 is driven to approach the screw 63 and to fit tightly to one end of the screw 63 by rotating the hexagon socket screw 8. The end cover 9 is fixed to the screw 63 by the hexagon socket screw 8, and the screw 63 is limited by the end cover 9 to prevent the screw 63 from detaching from the screw support seat 64. Then the thrust ball bearing 7 can be When the screw rod 63 rotates, the screw rod 63 keeps smooth and reduces the friction force when the screw rod 63 rotates. There is a pad 10 at the bottom of the motor support seat 61 and the screw rod support seat 64 respectively. The pad 10 is arranged to facilitate the leveling of the screw rod 63 when the screw rod is advanced and the motor 62 is installed, so as to ensure the smooth movement of the screw rod 63 system. A deep groove ball bearing 11 and two thrust ball bearings 7 are installed at the support end of the screw rod 63. The deep groove ball bearing 11 can support the smooth rotation movement of the screw rod 63. The thrust ball bearing 7 can ensure that the screw rod 63 itself will not have uncontrollable axial jump during the process of pushing and pulling the extension gear 5 component forward and backward. The chrome-plated optical axis 15 is fixed by the optical axis fixing seat 14, and then the linear bearing is fixed by the optical axis support seat 12. 13 is fixed, and the chrome-plated optical axis 15 is limited and supported by the linear bearing 13. Then, when the rear gear 4 moves, the friction of the optical axis support seat 12 can be reduced by the linear bearing 13, so that it can be more stable when in use. The optical axis support seat gasket 16 and the optical axis fixing seat gasket 17 are conducive to the leveling of the chrome-plated optical axis 15 when the chrome-plated optical axis 15 is installed, ensuring the smooth movement of the chrome-plated optical axis 15. The two ends of the extended gear 5 are respectively fixed on the sliders 19 of the two groups of guide rails 18 through two clamping frame Z-shaped plates 20. The two groups of guide rails 18 components are arranged symmetrically. A block 21 and a buffer 22 are installed at one end of the slider 19 as the limit limit of the movement of the extended gear 5 to ensure that the screw rod 63 will not move beyond the limit and even detach from the screw rod advancement motor 62.

[0043] In summary, the device for freely adjusting the size of the inner frame of an embroidery machine can adjust the size of the inner frame by setting an adjustment mechanism 6, and the rear stop 4 can be moved forward and backward by the adjustment mechanism 6, so as to reduce manual operation when adjusting the size, and can be more labor-saving when using. It solves the problem that the two ends of the embroidery frame extension stop of the existing embroidery machine are fastened to the porous long steel plate with bolts, and the fastening and shifting can be achieved by loosening the fastening bolts at both ends, manually shifting, and then re-tightening the bolts. This fastening and shifting method is time-consuming and labor-intensive, which hinders the improvement of the production efficiency of the embroidery machine and hinders the promotion of production automation and efficiency.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for freely adjusting the size of an inner frame of an embroidery machine, comprising a front stop (1), a left stop (2), a right stop (3), a rear stop (4) and an extension stop (5), characterized in that: The left gear (2) is fixedly connected to the left side of the front gear (1), the right gear (3) is fixedly connected to the right side of the front gear (1), the rear gear (4) is fixedly connected to the rear sides of the left gear (2) and the right gear (3), the extended gear (5) is arranged on both sides of the rear gear (4), and the top of the rear gear (4) is movably connected with an adjustment mechanism (6).

2. The device for freely adjusting the size of the inner frame of an embroidery machine according to claim 1, characterized in that: The adjusting mechanism (6) comprises a motor support seat (61), the motor support seat (61) is movably connected to the top of the rear gear (4), the inner wall of the motor support seat (61) is fixedly connected with a screw advancement motor (62), the motor support seat (61) is fixedly connected to the rear gear (4) by means of screws, the inner wall of the screw advancement motor (62) is threadedly connected with a screw (63), the other end of the screw (63) is sleeved with a screw support seat (64), and the screw support seat (64) is fixedly connected to the top of the extension gear (5) by means of screws.

3. The device for freely adjusting the size of the inner frame of an embroidery machine according to claim 2, characterized in that: Thrust ball bearings (7) are fixedly connected to both sides of the inner wall of the screw support seat (64), the inner ring of the thrust ball bearing (7) is fixedly connected to the surface of the screw (63), the front side of the screw (63) is threadedly connected to a hexagon socket screw (8), and the surface of the hexagon socket screw (8) is sleeved with an end cover (9).

4. The device for freely adjusting the size of the inner frame of an embroidery machine according to claim 2, characterized in that: The bottom of the motor support seat (61) and the bottom of the screw support seat (64) are both fixedly connected with a pad (10), the inner wall of the screw support seat (64) is fixedly connected with a deep groove ball bearing (11), and the inner ring of the deep groove ball bearing (11) is fixedly connected to the surface of the screw (63).

5. The device for freely adjusting the size of the inner frame of an embroidery machine according to claim 1, characterized in that: An optical axis support seat (12) is arranged at the top of the rear stop (4), and a plurality of the optical axis support seats (12) are arranged, and the plurality of optical axis support seats (12) are distributed at equal distances; a linear bearing (13) is fixedly connected to the inner wall of the optical axis support seat (12); an optical axis fixing seat (14) is arranged at the top of the extension stop (5), and a plurality of the optical axis fixing seats (14) are arranged, and the plurality of optical axis fixing seats (14) are distributed at equal distances.

6. The device for freely adjusting the size of the inner frame of an embroidery machine according to claim 5, characterized in that: The inner wall of the optical axis fixing seat (14) is fixedly connected with a chrome-plated optical axis (15), one end of the chrome-plated optical axis (15) is movably connected to the inner wall of the linear bearing (13), the bottom of the optical axis support seat (12) is fixedly connected with an optical axis support seat gasket (16), the optical axis support seat (12) is fixedly connected to the rear stop (4) via screws, the bottom of the optical axis fixing seat (14) is fixedly connected with an optical axis fixing seat gasket (17), and the optical axis fixing seat (14) is fixedly connected to the extension stop (5) via screws.

7. The device for freely adjusting the size of the inner frame of an embroidery machine according to claim 1, characterized in that: The top of the left stopper (2) and the top of the right stopper (3) are both fixedly connected to a guide rail (18), and the top of the guide rail (18) is movably connected to a slider (19).

8. The device for freely adjusting the size of the inner frame of an embroidery machine according to claim 7, characterized in that: The top of the slider (19) is fixedly connected to a clamp frame Z-shaped plate (20), one side of the clamp frame Z-shaped plate (20) is fixedly connected to two sides of the top of the extension bar (5) via screws, the rear side of the slider (19) is fixedly connected to a stopper (21), and the rear side of the stopper (21) is fixedly connected to a buffer (22).

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