Adjustable embroidery frame for embroidery machine

Abstract

The present invention discloses an adjustable embroidery frame for an embroidery machine, comprising a rectangular body formed by a left gear, a right gear, a front gear, and a rear gear, and an adjustment crossbar disposed within the rectangular body; the adjustment crossbar and the front gear or the rear gear are provided with a slide rail extending along the X-axis; a plurality of adjustment rods are provided between the front gear or the rear gear and the adjustment crossbar; the two ends of the adjustment rods are rotatably connected to a sliding structure, which is slidably connected to the corresponding slide rail; and the two ends of the adjustment rods are provided with a locking structure for locking the end of the adjustment rod to the front gear or the rear gear and the adjustment crossbar. The present invention has the beneficial effect of improving the fixed connection strength of the adjustment crossbar and the stability during the embroidery process.

Description

Technical Field

[0001] The invention relates to an embroidery frame, in particular to an adjustable embroidery frame for an embroidery machine. Background Art

[0002] When an embroidery machine is in operation, the embroidery frame needs to move back and forth in the X and Y axes of the working plane, and the pattern of the embroidery item is created by the embroidery frame moving along the X and Y axes. Existing embroidery frames are equipped with a sliding mechanism at the bottom to achieve the movement of the embroidery frame in the X and Y axes.

[0003] For example, patent application CN214328107U discloses an embroidery machine frame connection structure and an embroidery machine frame structure, belonging to the field of embroidery machine technology. The embroidery machine frame connection structure is installed between the embroidery frame and the embroidery machine guide rail and includes a connecting guide rail and a connecting pulley. The connecting pulley includes a connecting pulley seat and a plurality of bearings arranged in two parallel rows on the connecting pulley seat. The connecting guide rail is embedded between the two rows of bearings, allowing the connecting guide rail and the connecting pulley to be slidably connected. The connecting guide rail has an arc groove / arc flange on its outer circumference, and the bearing has an arc flange / arc groove on its outer circumference that mates with the arc groove / arc flange. The embroidery machine frame structure includes a table, an embroidery frame, a Y guide rail, and an X guide rail. The X guide rail is slidably connected to the left and / or right rail of the embroidery frame via a first embroidery machine frame connection structure. The Y guide rail is slidably connected to the front and / or rear rails of the embroidery frame via a second embroidery machine frame connection structure.

[0004] Although this patent application claims that the stability of the high-speed movement of the embroidery frame can be improved by slidingly connecting the rolling elements (bearings) and the guide rail frame (connecting guide rails), the direct contact between the guide rail frame and the rolling elements increases its wear and tear, making it prone to deformation and other damage. Once the sliding connection with the rolling elements cannot be maintained, it has to be removed and replaced, which not only shortens its service life but also increases subsequent costs.

[0005] The existing embroidery frame consists of a front rail, a back rail, a left rail, and a right rail, which are used to clamp the fabric, and then the embroidery needle can embroider the pattern on the fabric. To make the embroidery frame adaptable to fabrics of different sizes and specifications, an adjustment rail is added to the embroidery frame. The adjustment rail is fixedly connected to the front rail or the back rail, and the spacing between them can be adjusted.

[0006] For example, a patent application with prior art publication number CN212865210U discloses a variable-width embroidery frame structure for an embroidery machine, comprising an embroidery frame, a horizontal bar and a connecting bar, wherein the connecting bar has a first connecting portion detachably connected to the horizontal bar and a second connecting portion detachably connected to a horizontal frame border of the embroidery frame, the second connecting portion has a plurality of connecting holes so that the connecting bar can longitudinally adjust its fixed position relative to the horizontal frame; both ends of the horizontal bar have a third connecting portion detachably connected to the cloth clamping sections on the two opposite longitudinal frames of the embroidery frame, and the horizontal bar is provided with a cloth clamping section.

[0007] The patent application has the following shortcomings: there are multiple corresponding connecting holes on the connecting piece and the horizontal frame, which requires the horizontal frame to have a certain thickness and width, resulting in a larger overall weight of the embroidery frame and relatively high material processing costs; the connecting piece is connected to the adjusting crossbar (crossbar) at a position close to its end, which makes the fixed connection strength of the adjusting crossbar uneven along its length, which easily causes shaking during the embroidery process; the connecting piece is perpendicular to the adjusting crossbar, which makes the connection strength of the adjusting crossbar along the X-axis direction poor. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide an adjustable embroidery frame for an embroidery machine, which can improve the fixed connection strength of the adjustable crossbar and the stability during the embroidery process.

[0009] The present invention is achieved through the following technical solutions.

[0010] An adjustable embroidery frame for an embroidery machine comprises a rectangular body formed by a left gear, a right gear, a front gear, and a rear gear, and an adjustment crossbar arranged in the rectangular body; the adjustment crossbar and the front gear or the rear gear are provided with a slide rail extending along the X-axis; a plurality of adjustment rods are arranged between the front gear or the rear gear and the adjustment crossbar; both ends of the adjustment rods are rotatably connected to a sliding structure, and the sliding structure is slidably connected to the corresponding slide rail; both ends of the adjustment rods are provided with a locking structure for locking the end of the adjustment rod to the front gear or the rear gear and the adjustment crossbar.

[0011] As a further improvement of the present invention, the sliding rail is a groove formed on the top surface of the front gear or the rear gear or the adjusting cross bar, and the groove extends along the X-axis; the sliding structure is slidably embedded in the groove; the sliding structure is provided with a vertically extending positioning shaft, and the end of the adjusting rod is sleeved on the positioning shaft and can rotate around the positioning shaft.

[0012] As a further improvement of the present invention, the locking structure is sleeved on the positioning shaft and can apply pressure to the end of the adjusting rod, thereby locking the end of the adjusting rod on the top surface of the adjusting cross bar, front bar or rear bar, and the pressure is adjustable.

[0013] As a further improvement of the present invention, the top surface of the adjusting cross bar, front bar or rear bar forms a closing structure on both sides of the notch of the groove, so that the width of the notch is smaller than the width of the groove body and the sliding structure.

[0014] As a further improvement of the present invention, the locking structure and the positioning shaft are threadedly matched; or, the locking structure and the positioning shaft are fixedly connected, and the positioning shaft is inserted into the sliding structure and threadedly matched therewith.

[0015] As a further improvement of the present invention, the left gear and / or the right gear is provided with a guide rail extending along the Y-axis; the end of the adjustment cross piece is provided with a guide structure slidably connected to the corresponding guide rail.

[0016] As a further improvement of the present invention, the adjusting rod extends along the Y-axis.

[0017] As a further improvement of the present invention, the adjusting rod is inclined to the Y-axis.

[0018] As a further improvement of the present invention, at least two adjusting rods are inclined in opposite directions relative to the Y-axis.

[0019] As a further improvement of the present invention, adjacent adjustment rods are inclined in opposite directions relative to the Y-axis.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a plurality of adjustment rods between the adjustment crossbar, the front crossbar or the rear crossbar, and the adjustment rods can adjust the inclination amplitude, so that the spacing between the adjustment crossbar, the front crossbar or the rear crossbar can be adjusted, and due to the inclination setting of the adjustment rods, the adjustment crossbar has good fixed connection strength along the X-axis direction and the Y-axis direction, so that the adjustment crossbar has good stability during the embroidery process; in addition, the number arrangement, position arrangement and inclination direction arrangement of the adjustment rods can be flexibly adjusted according to the actual embroidery situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the objects and advantages of the present invention, wherein:

[0023] Figure 1 A schematic diagram of the three-dimensional structure of the embroidery frame sliding mechanism of implementation case 1;

[0024] Figure 2 Schematic diagram of the cross-section structure of the embroidery frame sliding mechanism of implementation case 1;

[0025] Figure 3 A schematic cross-sectional view of a rolling element in accordance with Example 1;

[0026] Figure 4A schematic diagram of the three-dimensional structure of the embroidery frame sliding mechanism of implementation case 2;

[0027] Figure 5 Schematic diagram of the cross-section structure of the embroidery frame sliding mechanism of implementation case 2;

[0028] Figure 6 A bottom view schematic diagram of the embroidery frame sliding mechanism and the embroidery frame of the embroidery machine according to Example 3;

[0029] Figure 7 A schematic top view of an adjustable embroidery frame of an embroidery machine according to Example 4;

[0030] Figure 8 A schematic diagram of the three-dimensional structure of the adjustment rod and the slide rail in implementation case 4;

[0031] Figure 9 Schematic diagram of the cross-sectional structure of the adjusting rod and the slide rail in implementation case 4;

[0032] Figure 10 This is a schematic diagram of the top view of the guide rail and guide structure of implementation case 4. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and implementation examples.

[0034] In this specification, directional terms such as up, down, left, right, front, back, front, back, top, and bottom, which are mentioned or may be mentioned, are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these or other directional terms should not be construed as restrictive.

[0035] Implementation Case 1:

[0036] Reference Figure 1-Figure 3An embroidery frame sliding mechanism includes one or two guide rail frames 11a, two guide rail shafts 12a, a trolley seat 13a, and multiple rolling elements 14a. The guide rail frame 11a has one or two slots 111a extending along its length for receiving the guide rail shafts 12a, with the sides of the guide rail shafts 12a protruding from the slots 111a. The rolling elements 14a have connecting shafts 141a connected to the trolley seat 13a. The rolling elements 14a are arranged in two rows, each row slidingly attached to the sides of the two guide rail shafts 12a. The sliding mechanism is specifically disposed on the bottom of the embroidery frame. More specifically, the guide rail frame 11a is fixed to the bottom surface of the embroidery frame. The sliding of the two rows of rolling elements 14a on the guide rail shafts 12a allows the trolley seat 13a to slide relative to the embroidery frame, thereby achieving movement of the embroidery frame.

[0037] Compared to the prior art, the present invention replaces the direct contact between the rolling element 14a and the guide frame 11a by placing the guide shaft 12a within the slot 111a. Firstly, this can reduce the degree of wear on the guide frame 11a and increase its service life. Moreover, if the guide shaft 12a is damaged, there is no need to replace the guide frame 11a; the damaged guide shaft 12a can simply be removed and replaced with a new one. Secondly, the guide frame 11a only needs to be machined to form a long groove for the guide shaft 12a, which can reduce the processing accuracy requirements and reduce the difficulty and cost of production.

[0038] To improve the connection strength between the guide rail frame 11a and the guide rail shaft 12a, at least one of the two corners of the slot 111a that form the slot has a hook structure 111-1a that converges toward the slot, which is used to snap the guide rail shaft 12a into the slot 111a. The central axis of the guide rail shaft 12a is located between the hook structure 111-1a and the bottom of the slot 111a, so that the guide rail shaft 12a can be stably and reliably embedded in the slot 111a, preventing the guide rail shaft 12a from falling out of the slot 111a, and improving the stability of the trolley seat 13a sliding on the guide rail shaft 12a. Generally, only one hook structure 111-1a is provided. In this embodiment, the corner below the slot 111a has the hook structure 111-1a.

[0039] To increase the contact area between the rolling element 14a and the guide shaft 12a, thereby further enhancing the stability of the rolling element 14a sliding on the guide shaft 12a, the mating surfaces of the rolling element 14a and the guide shaft 12a are respectively designed as concave and convex arc surfaces. Furthermore, the guide shaft 12a is configured as a round rod. Not only does the side portion exposed outside the slot 111a form a convex arc surface, but its round rod shape also facilitates its insertion into the slot 111a.

[0040] Furthermore, the rolling element 14a is configured as a double-row cylindrical roller bearing with two rows of surrounding rollers 143a. This bearing provides strong support along the axial direction of the rolling element 14a, allowing the rolling element 14a to be securely sleeved onto the connecting shaft 141a. The rollers 143a also provide strong support along the radial direction of the rolling element 14a, making the sliding connection between the rolling element 14a and the guide shaft 12a more stable and reliable.

[0041] In this embodiment, the guide rail frame 11a is provided as one, the two clamping slots 111a are respectively provided on the left and right sides of the guide rail frame 11a, and the trolley seat 13a spans the guide rail frame 11a.

[0042] The position of one of the two rows of rolling elements 14a on the trolley seat 13a can be adjusted to change the spacing between the two rows of rolling elements 14a, so that the strength of the sliding connection between the two rows of rolling elements 14a on the two guide shafts 12a can be adjusted according to actual application requirements.

[0043] More specifically, the connecting shaft 141a of one row of adjustable rolling elements 14a is offset from the central axis of the rolling elements 14a, meaning that the row of rolling elements 14a and its connecting shaft 141a form an eccentric structure. The connecting shaft 141a passes through the trolley seat 13a and can rotate about its own central axis, thereby changing the spacing between the two rows of rolling elements 14a. The connecting shaft 141a is provided with a locking structure 142a that can lock the connecting shaft 141a to the trolley seat 13a. In this embodiment, the locking structure 142a is a nut that is threadedly engaged with the connecting shaft 141a. After rotating the connecting shaft 141a to adjust the position of the rolling elements 14a, tightening the nut to prevent the connecting shaft 141a from rotating locks the rolling elements 14a in place on the trolley seat 13a.

[0044] Implementation Case 2:

[0045] Reference Figure 4 、 Figure 5 , an embroidery frame sliding mechanism, except for the number of guide rail frames and the setting position of the guide rail shaft, the rest is the same as implementation case 1.

[0046] In this embodiment, there are two guide rail frames 11b, which are arranged in parallel and spaced apart by a certain distance. Two slots 111b are respectively arranged on opposite sides of the two guide rail frames 11b, and two guide rail shafts 12b are respectively arranged in the two slots 111b.

[0047] The trolley seat 13b spans across one of the guide rail frames 11b, and two rows of rolling elements 14b are arranged on one side of the trolley seat 13b located between the two guide rail frames 11b. The two rows of rolling elements 14b are staggered and slidably arranged on the corresponding guide rail shafts 12b.

[0048] Implementation Case 3:

[0049] Reference Figure 6 An embroidery frame of an embroidery machine includes a left block 21, a right block 22, a front block 23, and a rear block 24 which are enclosed in a rectangular shape. The outer side of the left block 21 or the right block 22 is provided with a parallel independent horizontal block 25.

[0050] The bottom surfaces of the front and rear rails 23 and 24 are provided with a first embroidery frame sliding mechanism a, which is the embroidery frame sliding mechanism of implementation case 1. The guide rail frame of the first embroidery frame sliding mechanism is fixed to the bottom surfaces of the front and rear rails 23 and 24.

[0051] The bottom surface of the independent cross bar 25 is provided with a second embroidery frame sliding mechanism b, which is the embroidery frame sliding mechanism of implementation case 2. The two guide rail frames of the second embroidery frame sliding mechanism b are fixed on the bottom surface of the independent cross bar 25, and the pulley seat is fixedly connected to the left block 21 or the right block 22.

[0052] The embroidery frame can move along the X-axis and the Y-axis through the first embroidery frame sliding mechanism a and the second embroidery frame sliding mechanism b.

[0053] Implementation Case 4:

[0054] Reference Figure 7-10 An adjustable embroidery frame for an embroidery machine includes a rectangular body formed by a left frame 21, a right frame 22, a front frame 23, and a rear frame 24, and an adjustment crossbar 26 disposed within the rectangular body. The adjustment crossbar 26 is used to adjust and limit the actual width of the fabric held by the embroidery frame. The adjustment crossbar 26 can be connected to either the front frame 23 or the rear frame 24. In this embodiment, the adjustment crossbar 26 is connected to the front frame 23.

[0055] The adjusting crossbar 26 and the front bar 23 are both provided with a slide rail 3 extending along the X-axis, with a plurality of adjusting rods 4 provided therebetween. A sliding structure 5 is provided at each end of the adjusting rod 4. The ends of the adjusting rod 4 are rotatably connected to the sliding structure 5, and the sliding structure 5 is slidably connected to the corresponding slide rail 3. The sliding structure 5 moves along the X-axis on the slide rail 3. During the movement, the ends of the adjusting rod 4 rotate around the sliding structure 5 to change its tilt angle, thereby increasing or decreasing the distance between the adjusting crossbar 26 and the front bar 23. Locking structures 6 are provided at both ends of the adjusting rod 4 for locking the ends of the adjusting rod 4 to the front bar 23 and the adjusting crossbar 26. After the distance between the adjusting crossbar 26 and the front bar 23 is adjusted, the adjusting rod 4 is locked by the two locking structures 6 on the adjusting rod 4, i.e., the distance between the adjusting crossbar 26 and the front bar 23 is locked.

[0056] First, considering the space occupied by the embroidery frame, in the prior art with publication number CN212865210U, the horizontal rail (crossbar) is adjusted by adjusting the connection position of the connecting rail on the front rail (horizontal frame), thereby changing the spacing between the horizontal rail and the front rail. When the spacing between the horizontal rail and the front rail needs to be smaller, one end of the connecting rail will extend outside the front rail. To prevent mechanical interference between the connecting rail and other components of the embroidery machine, space must be reserved for the connecting rail to extend outside the embroidery frame, which is detrimental to the overall spatial layout of the embroidery machine. Furthermore, since the connecting rail needs to be fixed on the adjustable horizontal rail, its structural strength is relatively high, and extending the connecting rail outside the embroidery frame also poses a safety hazard.

[0057] Compared with the prior art, no matter how the inclination angle of the adjusting rod 4 of the present application is adjusted, both ends of the adjusting rod 4 are positioned on the slide rail 3 of the front block 23 and the adjusting cross block 26, that is, the adjusting rod 4 will not cross the front block 23 and extend outside the embroidery frame, thereby reducing the size of the space occupied by the embroidery frame by default, and will not cause mechanical interference with other components of the embroidery machine, and can also eliminate safety hazards.

[0058] Secondly, from a cost perspective, in the existing technology, in order to improve the fixed connection strength of the connecting rail and the front rail, a plurality of connection holes are provided on the connecting rail and the front rail and fixedly connected by fasteners such as screws. This requires the front rail to have a certain thickness and width, which makes the front rail heavier, thereby increasing the load of the power equipment that drives the embroidery frame to move. Moreover, the front rail has relatively high requirements in terms of material quantity and material, which also increases the cost.

[0059] Compared to the prior art, in this application, the front rail 23 does not need to be thickened or widened, and the embroidery frame can be made of conventional specifications and materials. Neither the driving load nor the cost will be affected. In addition, the structure of the adjusting rod 4 is relatively simple. Compared with the connecting rail that needs to be processed through a series of drilling processes, the processing and production difficulty of the adjusting rod 4 is lower than that of the connecting rail, which is also a factor affecting the production cost. At the same time, since a connecting rail is set between the adjusting crossbar and the front rail in the prior art, if the connecting rail is damaged, it can only be replaced as a whole. In this application, multiple adjusting rods 4 are connected between the adjusting crossbar 26 and the front rail 23. If a single or several adjusting rods 4 are damaged, only the damaged one needs to be replaced, without replacing the entire rod. Therefore, the maintenance cost during subsequent use is also lower.

[0060] Finally, considering the strength of the fixed connection, in the prior art, the connecting rail is required to have a certain thickness to ensure the connection strength between the connecting rail and the adjustment rail. To avoid mechanical interference between the connecting rail and the embroidery machine located above the embroidery frame, the connecting rail is located near the ends of the adjustment rail and the front rail. This results in uneven fixed connection strength of the adjustment rail, especially the portion of the adjustment rail away from the connecting rail, which is prone to Y-axis wobble during embroidery. Furthermore, because the connecting rail is perpendicular to the adjustment rail, that is, extends along the Y-axis, the fixed connection strength of the adjustment rail is higher along the Y-axis, while the fixed connection strength along the X-axis is relatively weak. Therefore, the adjustment rail is also prone to X-axis wobble during embroidery.

[0061] Compared to the prior art, in this application, the adjustment crossbar 26 is connected to multiple adjustment rods 4 along the X-axis, ensuring a relatively uniform connection strength along its length. This prevents localized weak connection strength on the adjustment crossbar 26, which could cause the adjustment crossbar 26 to wobble along the Y-axis during embroidery. Furthermore, the distribution of the adjustment rods 4 can be flexibly adjusted based on the actual stress conditions on the adjustment crossbar 26. For example, if the fabric held by the adjustment crossbar 26, the left crossbar 21, the right crossbar 22, and the rear crossbar 24 is embroidered in the center, the center of the adjustment crossbar 26 will be subject to greater stress than its left and right sides. Therefore, more adjustment rods 4 can be connected to the center of the adjustment crossbar 26, while fewer adjustment rods 4 can be connected to the left and right sides. For another example, if the overall stress on the adjustment crossbar 26 is relatively high due to thick fabric, the number of adjustment rods 4 can be appropriately increased, thereby achieving a more secure connection strength for the adjustment crossbar 26.

[0062] In addition, since the two ends of the adjusting rod 4 can rotate around the sliding structure 5, the direction of the adjusting rod 4 can be adjusted to be inclined to the adjusting crossbar 26, that is, the adjusting rod 4 can provide supporting force to the adjusting crossbar 26 along the Y-axis direction and the X-axis direction, thereby making the fixed connection strength of the adjusting crossbar 26 more balanced, and the adjusting crossbar 26 can be adjusted to prevent shaking in the X-axis direction or the Y-axis direction during embroidery.

[0063] Due to the flexible adjustment of the connection mode of the adjusting rod 4, there are two major types of connection modes between the adjusting crosspiece 26 and the adjusting rod 4.

[0064] The first connection method: The adjustment rods 4 all extend along the Y-axis, that is, the adjustment rods 4 are all perpendicular to the adjustment crosspiece 26. In this connection method, the distance between the adjustment crosspiece 26 and the front crosspiece 23 is maximized, and the adjustment crosspiece 26 has the highest fixed connection strength along the Y-axis direction. However, its disadvantage is that the fixed connection strength along the X-axis direction is relatively weak.

[0065] The second connection mode: the adjusting rod 4 is inclined to the Y axis, that is, the adjusting rod 4 can provide supporting force to the adjusting crosspiece 26 along both the Y axis direction and the X axis direction.

[0066] For further optimization of the second connection method, at least two of the adjusting rods 4 are inclined in opposite directions relative to the Y-axis, that is, the adjusting rods 4 can provide supporting force for the adjusting crossbar 26 in both the positive and reverse directions along the X-axis, thereby further improving the fixed connection strength of the adjusting crossbar 26 along the X-axis direction and the stability during the embroidery process.

[0067] Furthermore, the adjacent adjustment rods 4 are tilted in opposite directions relative to the Y-axis, so that the adjustment rods 4 are arranged in an eight-shaped shape along the length direction of the adjustment crosspiece 26. This connection method can provide the most balanced fixed connection strength for the adjustment crosspiece 26.

[0068] In addition, it can also be flexibly adjusted according to actual application conditions. For example, if the embroidery area of ​​the fabric is concentrated in the middle, the adjustment rod 4 corresponding to the middle of the adjustment crossbar 26 is arranged in an eight-shaped shape, and the adjustment rods 4 on the left side are all set along an inclined angle, and the adjustment rods 4 on the right side are all set along the opposite inclined direction, so that the middle part of the adjustment crossbar 26 has a relatively strong connection strength in the positive and negative directions of the X-axis, and the left / right side of the adjustment crossbar 26 has a unidirectional enhanced connection strength.

[0069] Regarding the adjustment rod 4 and the slide rail 3, the slide rail 3 is a groove formed on the top surface of the front stop 23 and the adjustment crosspiece 26. The groove extends along the X-axis, and the sliding structure 5 is slidably embedded in the groove. By embedding the slide rail 3 below the top surface of the front stop 23 and the adjustment crosspiece 26, the space occupied vertically by the adjustment rod 4 and the slide rail 3 can be compressed, thereby optimizing the spatial layout and avoiding mechanical interference. The sliding structure 5 is provided with a vertically extending positioning shaft 51. The end of the adjustment rod 4 is sleeved on the positioning shaft 51 and can rotate around the positioning shaft 51. This relatively simple structure realizes the function of the adjustment rod 4 rotating around the sliding structure 5.

[0070] The locking structure 6 is mounted on the positioning shaft 51 and can apply pressure to the end of the adjusting rod 4, thereby locking the end of the adjusting rod 4 to the top surface of the adjusting crossbar 26 or the front crossbar 23. Furthermore, the pressure applied by the locking structure 6 on the end of the adjusting rod 4 can be adjusted. For example, the locking structures 6 at both ends of the adjusting rod 4 apply one large pressure and one small pressure, both of which are less than the force required to lock the ends. When the adjusting crossbar 26 is moved along the Y-axis, the sliding structure 5 corresponding to the end with less pressure slides along the slide rail 3, while the sliding structure 5 corresponding to the end with greater pressure remains stationary. This method can be used when the adjusting crossbar 26 needs to be adjusted slightly, so that the spacing between adjacent adjusting rods 4 remains unchanged. The locking structures 6 at both ends of the adjusting rod 4 can also be completely loosened. In this way, the resistance to moving the adjusting crossbar 26 along the Y-axis is smaller, which is suitable for adjusting the position of the adjusting crossbar 26 by a large margin. However, after the adjustment, the spacing between the adjusting rods 4 needs to be readjusted.

[0071] Furthermore, the top surfaces of the adjusting cross piece 26 and the front piece 23 are formed with closing structures 31 on both sides of the slot of the groove (guide rail 3), so that the width of the slot is smaller than the width of the slot body and the sliding structure 5, so that the sliding structure 5 is constrained in the groove, thereby preventing the sliding structure 5 from falling out.

[0072] Regarding the specific configuration of the locking structure 6, the locking structure 6 and the positioning shaft 51 are threadedly engaged, or the locking structure 6 and the positioning shaft 51 are fixedly connected, and the positioning shaft 51 is inserted into and threadedly engaged with the sliding structure 5. In addition, because the closing structures 31 are formed on both sides of the notch, when the locking structure 6 is tightened, not only does the end of the adjustment rod 4 press tightly against the top surface of the adjustment crosspiece 26 and the front stop 23, but the sliding structure 5 is also pressed against the closing structures 31, achieving a double locking effect, thereby further strengthening the fixed connection strength of the adjustment crosspiece 26.

[0073] Furthermore, the end of the adjusting rod 4 is set to a hollow structure, and is surrounded by a top wall 41, a bottom wall 42 and two side walls 43 to form a frame structure. The end of the adjusting rod 4 has a circular hole at the top to allow the locking structure 6 to enter the end of the adjusting rod 4. It can not only further compress the space occupied by the end of the adjusting rod 4 in the vertical space, but also make the locking structure 6 press on the thinner bottom wall 42, which can further improve the locking effect.

[0074] In addition, the left gear 21 and / or the right gear 22 is provided with a guide rail 262 extending along the Y-axis, and the end of the adjustment cross bar 26 is provided with a guide structure 261 slidably connected to the corresponding guide rail, which plays a better guiding role when the adjustment cross bar 26 is moved along the Y-axis direction, thereby preventing the adjustment cross bar 26 from being deflected.

[0075] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. An adjustable embroidery frame for an embroidery machine, comprising a rectangular body formed by a left gear, a right gear, a front gear, and a rear gear, and an adjustment crossbar disposed within the rectangular body; characterized in that: The adjustment crossbar and the front or rear gear are provided with a slide rail extending along the X-axis; a plurality of adjustment rods are provided between the front or rear gear and the adjustment crossbar; both ends of the adjustment rod are rotatably connected to a sliding structure, which is slidably connected to the corresponding slide rail; both ends of the adjustment rod are provided with a locking structure for locking the end of the adjustment rod to the front or rear gear and the adjustment crossbar; the slide rail is a groove formed on the top surface of the front or rear gear and the adjustment crossbar, and the groove extends along the X-axis; the sliding structure is slidably embedded in the groove; the sliding structure is provided with a vertically extending positioning shaft, and the end of the adjustment rod is sleeved on the positioning shaft and can rotate around the positioning shaft; the locking structure is sleeved on the positioning shaft and applies pressure to the end of the adjustment rod, thereby locking the end of the adjustment rod to the top surface of the adjustment crossbar and the front or rear gear, and the pressure is adjustable; the left gear and / or the right gear are provided with a guide rail extending along the Y-axis; the end of the adjustment crossbar is provided with a guide structure slidably connected to the corresponding guide rail.

2. The adjustable embroidery frame of the embroidery machine according to claim 1, characterized in that: The top surfaces of the adjusting cross piece and the front piece or the rear piece are formed with closing structures on both sides of the notch of the groove, so that the width of the notch is smaller than the width of the groove body and the sliding structure.

3. The adjustable embroidery frame of the embroidery machine according to claim 2, characterized in that: The locking structure and the positioning shaft are threadedly matched; or the locking structure and the positioning shaft are fixedly connected, and the positioning shaft is inserted into the sliding structure and threadedly matched therewith.

4. The adjustable embroidery frame of an embroidery machine according to any one of claims 1 to 3, characterized in that: The adjusting rod extends along the Y-axis.

5. The adjustable embroidery frame of an embroidery machine according to any one of claims 1 to 3, characterized in that: The adjusting rod is inclined with respect to the Y axis.

6. The adjustable embroidery frame of the embroidery machine according to claim 5, characterized in that: At least two adjusting rods are inclined in opposite directions relative to the Y axis.

7. The adjustable embroidery frame of the embroidery machine according to claim 6, characterized in that: The adjacent adjustment rods are inclined in opposite directions relative to the Y-axis.

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