Knob for clamp, clamp and quilting machine

Abstract

The knob is provided with a holding part and is characterized in that the knob is further provided with a hinge part used for achieving rotatable connection and a clamping plate matched with a clamping groove, the clamping plate is arranged on the side face of the knob, the outline of the clamping plate comprises the outer outline of the side away from the knob, and the outer outline of the side away from the knob is provided with a clamping groove matched with the clamping groove. The outer contour is of an arc-shaped structure; the rotary knob can be matched with the clamping groove in the clamp and can clamp and loosen fabric in a rotating mode, so that the rotary knob is more convenient and labor-saving to use, a better clamping effect can be achieved, and sewing to edges is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing equipment technical field, concretely relates to a knob for clamp, clamp and quilting machine. BACKGROUND

[0002] The quilting machine (sewing machine) is a kind of commonly used textile equipment, since quilting machine can automatically and quickly sew multiple materials and patterns under the accurate control of its computer system, so it is widely used in the sewing production of various quilts, bed covers, sleeping bags, mattresses, textile decorations and the like.

[0003] Taking the existing quilting machine as an example, in the quilting machine sewing production process, first of all, material (or cloth) needs to be tensioned and fixed on the material frame, then quilting machine can be used for sewing work;In order to tension and fix the material on the material frame, a row of cloth clamps is usually arranged at the edge of the existing material frame, the number of cloth clamps varies from several to dozens, when the material needs to be tensioned, manual operation is needed to clamp each cloth clamp on the material, so as to tension the material by using the cloth clamp, however, using such a way to tension the material has problems such as troublesome operation, long process time and low efficiency when tensioning the fabric, on the one hand, the clamping force is not enough, and it is easy to loosen in the process of tensioning and sewing, which affects the sewing accuracy, on the other hand, it cannot be sewn to the edge in the sewing process;Therefore, a clamp is designed, which can clamp and release the fabric by rotating the knob, not only clamps more firmly, and it is not easy to come out in the process of tensioning and sewing, but also more conducive to sewing to the edge;In this clamp, the structure of the knob directly affects the clamping effect, but the existing knob is not conducive to better clamping effect, and it needs to be solved urgently. SUMMARY

[0004] The first aspect of the utility model solves the above technical problems, and provides a knob that can achieve better clamping effect in the clamp, and the main idea is as follows:

[0005] A knob for a clamp, the knob is configured with a holding part, the knob is also configured with a hinge part for realizing rotatable connection and a clamping plate matched with a slot, the clamping plate is configured on the side surface of the knob, and the contour of the clamping plate includes an outer contour away from the knob, and the outer contour is configured as an arc structure.In this scheme, the holding part is arranged in the knob to make it easier for the user to exert force, and the use is more convenient;The clamping plate matched with the slot is configured on the knob, and the clamping plate is configured on the side surface of the knob, so that the knob can better clamp the slot in the clamp, and the outer contour of the clamping plate is configured as an arc structure, which not only can realize firm clamping effect, but also can clamp and release the fabric more easily, and the use is very convenient.In addition, it is also beneficial to make the whole clamp thinner, lower and smaller, so as to be more conducive to sewing to the edge.

[0006] In some schemes, the outer contour is configured as a circular arc structure, and the center of the circular arc structure coincides with the center of the hinge. Thus, the center of the circular arc structure coincides with the center of rotation of the knob, so that the knob can clamp the fabric when rotated clockwise or counterclockwise, without distinguishing the direction during use, thereby making the clamping process simpler, more convenient and efficient.

[0007] In some schemes, the center of the arc structure deviates from the center of the hinge. By deviating the center of the arc structure from the center of the hinge, the center of the arc structure also deviates from the center of rotation of the knob, achieving the purpose of eccentric design of the outer contour of the clamp plate. On the one hand, the gap between the outer contour of the clamp plate and the clamping groove gradually decreases during the process of locking the fabric, making the locking process smoother and labor-saving. On the other hand, the eccentric design can also produce the effect of pulling tighter, effectively preventing the problem of fabric falling off caused by the loosening of the knob during the process of stretching or tensioning the fabric. At the same time, the eccentric design can also achieve the effect of automatically unlocking the knobs by pulling the fabric, making the use process more convenient, efficient and labor-saving. In addition, it can meet different needs in different occasions, and the universality and convenience are significantly improved.

[0008] Preferably, the outer contour of the clamp plate is configured as an elliptical arc structure or a circular arc structure. Not only can the eccentric effect be achieved, but also the clamping of the fabric can be smoother and more labor-saving, and the shape of the clamp plate is more regular, which is more convenient for processing and forming.

[0009] Further, the contour of the clamp plate also includes two oppositely arranged side contours, and the two ends of the outer contour are connected with the side contours respectively. By configuring the side contours, the outer contour can be configured at a position farther away from the knob, so that the clamp plate can be made longer, which not only facilitates the cooperation of the clamp plate and the clamping groove, but also effectively prevents interference during sewing, and is more conducive to sewing to the edge.

[0010] Further, the contour of the clamp plate also includes an arc transition contour connecting the outer contour and the side contour. On the one hand, it can prevent the contour of the clamp plate from having sharp corners, achieving the purpose of protecting the fabric. On the other hand, the gap between the clamp plate and the clamping groove gradually decreases in the initial stage of the clamp plate turning to the clamping groove, so as to gradually clamp the surface, which not only makes the clamping process smoother and more labor-saving, but also can unlock the clamped fabric more labor-savingly.

[0011] The third aspect of the utility model discloses to solve the problem of improving clamping force and preventing fabric from falling off, further, the guide surface is structured between the outer contour and the upper surface of the clamping plate. By constructing the arc surface, the clamping plate can be guided into the clamping groove in the process of rotating the knob, so that the gap between the upper surface of the clamping plate and the upper edge of the clamping groove can be reserved less in implementation, and even the upper surface of the clamping plate can be higher than the upper edge of the clamping groove, so that greater clamping force can be generated between the clamping plate and the upper edge of the clamping groove, which is beneficial to further clamping the fabric by rotating the knob and preventing the fabric from falling off.

[0012] Preferably, the clamping plate is structured as a plate structure. By constructing the clamping plate as a plate structure, the entire clamping plate is thinner, which is more conducive to avoiding interference with the sewing machine, thereby being more conducive to sewing to the edge, and being more convenient for cooperating with the corresponding clamping groove to achieve better sewing effect.

[0013] Preferably, the hinge part is a hinge hole or a hinge shaft. It is convenient to realize the rotatable installation of the knob, and the hinge part can be used as a positioning reference to position and process the outer contour of the clamping plate, which is conducive to improving the processing precision.

[0014] Preferably, the center of the hinge part coincides with the geometric center of the knob. It is more convenient to form more accurate cooperation between the clamping plate and the clamping groove.

[0015] Preferably, the side surface of the knob is structured with two clamping plates, and the two clamping plates are symmetrically arranged. On the one hand, the fabric can be clamped whether the knob rotates clockwise or counterclockwise in actual use, so that the clamping process is simpler, more convenient and more efficient. On the other hand, in the case of eccentric design of the clamping plate contour, the rotation direction of rotation can be selected according to the actual functional requirements, so that the use requirements of different occasions can be met, and the versatility is better.

[0016] A clamp, comprising the knob, further comprising a base structured with a clamping groove adapted to the clamping plate, the knob is rotatably connected to the base through the hinge part, the clamping groove faces the knob, and the clamping plate can be screwed into and out of the clamping groove by rotating the knob.

[0017] To solve the problem of sewing to the edge more conveniently, further, the upper surface of the base comprises an inclined surface inclined to the horizontal aspect, the knob is limited by the inclined surface, so that the rotation center of the knob is inclined to the vertical direction; the clamping groove is arranged at the bottom end of the inclined surface and faces the inclined knob. In this scheme, by arranging the inclined surface inclined to the horizontal aspect on the upper surface of the base and arranging the clamping groove at the bottom end of the inclined surface, the side of the base away from the clamping groove has greater height and thickness, which can structurally strengthen the base, significantly improve the rigidity of the base, improve the stability and reliability of the whole base, and facilitate making the base longer to meet the use requirements in more occasions; by making the rotation center of the knob inclined to the vertical direction and arranging the clamping groove at the bottom end of the inclined surface and facing the inclined knob, the inclined knob can be matched with the clamping groove, and the knob and the clamping groove can be matched at a lower position, closer to the sewing surface, which can further ensure sewing to the edge and is less likely to interfere with the sewing process.

[0018] To improve the versatility, further, the base is arranged with a guide groove parallel to the clamping groove, the base is connected to the sliding part through the connecting piece of the hinge part, and the sliding part is movably limited in the guide groove. In this scheme, by arranging the guide groove parallel to the clamping groove and connecting the base to the sliding part, the sliding part is movably limited in the guide groove, so that the knob can be moved along the guide groove through the cooperation of the sliding part and the guide groove to adjust the position of the knob according to actual requirements, and the knob can be matched with the clamping groove at any position, thereby significantly improving the versatility.

[0019] Preferably, the base is provided with a plurality of knobs.

[0020] A quilting machine comprises the knob or the clamp.

[0021] Compared with the prior art, the knob for the clamp, the clamp and the quilting machine provided by the utility model can be matched with the clamping groove in the clamp and can clamp and loosen the fabric through rotation, which is convenient and labor-saving, can achieve better clamping effect, and is convenient for sewing to the edge. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the premise of the drawings.

[0023] Figure 1 This is a schematic diagram of the structure of a knob provided in Embodiment 1 of this utility model.

[0024] Figure 2 for Figure 1 Top view.

[0025] Figure 3 This is a schematic diagram of the structure of a clamp provided in Embodiment 1 of this utility model.

[0026] Figure 4 for Figure 3 Front view of the central base.

[0027] Figure 5 for Figure 3 The main view.

[0028] Figure 6 This is a schematic diagram of placing the fabric behind the clamp. The clamp of the knob in the diagram is rotated to a position away from the slot.

[0029] Figure 7 This is a diagram illustrating how rotating the knob clamps the fabric between the clamping plate and the slot.

[0030] Figure 8 This is a partial structural diagram of another clamp provided in Embodiment 1 of this utility model.

[0031] Figure 9 This is a top view of another knob provided in Embodiment 1 of this utility model.

[0032] Figure 10 This is a top view of a knob provided in Embodiment 2 of this utility model.

[0033] Figure 11 This is a top view of another knob provided in Embodiment 2 of this utility model.

[0034] Figure 12 This is a top view of another knob provided in Embodiment 2 of this utility model.

[0035] Figure 13 To utilize Figure 13 The diagram shows the knob clamping the fabric. The dotted line in the diagram represents the direction of rotation of the knob.

[0036] Figure 14 This is a schematic diagram of the structure of a clamp provided in Embodiment 3 of this utility model.

[0037] Figure 15 for Figure 14 A partial sectional view of the connecting part.

[0038] Figure 16An illustrative view of four clamps in a quilting machine, through the cooperation of the four clamps, the fabric can be tensioned in two directions.

[0039] Marked description in the figure: clamp 1; base 2, guide groove 21, clamping groove 22, top 221, side 222, inclined surface 23, accommodating groove 24; knob 3, hinge hole 31, center of hinge hole (center of hinge part) 311, holding part 32, clamping plate 33, outer contour 34, center of outer contour 341, side contour 35, arc-shaped transition contour 36, guide surface 37, upper surface 38; connecting piece 4; sliding part 51, threaded hole 511, sleeve 52, washer 53; machine frame 6, air cylinder 61; fabric 7. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0041] Embodiment 1

[0042] A clamp for tensioning fabric is provided in the embodiment, which can be used in sewing equipment, for example, can be used in a quilting machine. In the embodiment, the fabric 7 can be cloth, cotton quilt, down quilt, etc. The fabric 7 can be single-layer or multi-layer.

[0043] In the embodiment, the clamp 1 includes a base 2 and a knob 3. The base 2 can serve as a support and a carrier, and is also the installation basis of other components. Figure 1 As shown in the figures, in the embodiment, the knob 3 is configured with a holding part 32 for easy holding, so as to rotate the knob 3 through the holding part 32, which is more labor-saving and convenient. Figure 2 As shown in the figures, in the embodiment, the knob 3 is configured with a holding part 32 for easy holding, so as to rotate the knob 3 through the holding part 32, which is more labor-saving and convenient. Figure 1 Figure 2 As shown in the figures, in the embodiment, the knob 3 is configured with a holding part 32 for easy holding, so as to rotate the knob 3 through the holding part 32, which is more labor-saving and convenient.

[0044] As shown in the figures, in the embodiment, the knob 3 is configured with a holding part 32 for easy holding, so as to rotate the knob 3 through the holding part 32, which is more labor-saving and convenient. Figure 1 Figure 2 ​​As shown, in the embodiment, the knob 3 is further configured with a hinge portion for realizing the rotatable connection, so that the knob 3 is rotatably connected to the base 2 through the hinge portion. In the implementation, the hinge portion can adopt a hinge hole 31 or a hinge shaft, which not only facilitates the rotatable installation of the knob 3, but also can be used as a positioning reference to position and process the outer contour 34 of the clamping plate 33, thereby facilitating the improvement of the processing precision. For example, in the embodiment, the lower surface of the knob 3 can be configured as a plane to adapt to the base 2, and the hinge portion adopts the hinge hole 31 which penetrates the upper surface 38 and the lower surface of the knob 3. The hinge hole 31 adopts a circular hole, and the hinge hole 31 is preferably configured at the central position of the knob 3, for example, the center 311 (the abbreviation of the central axis) of the hinge hole can coincide with the geometric center of the knob 3. Figure 1 and Figure 2 As shown, the hinge hole 31 is preferably configured at the central position of the knob 3, for example, the center 311 (the abbreviation of the central axis) of the hinge hole can coincide with the geometric center of the knob 3. In the implementation, the knob 3 can be connected to the base 2 through the connecting piece 4 which adapts to the hinge portion, for example, the connecting piece 4 can adopt a hinge shaft, a bolt or a screw which adapts to the hinge hole 31. The outer diameter of the connecting piece 4 can be smaller than the inner diameter of the hinge hole 31, which not only can constrain the knob 3, but also can make the knob 3 rotate relative to the base 2.

[0045] As shown, Figure 1 and Figure 2 In the embodiment, the side surface of the knob 3 is configured with the clamping plate 33, and at the same time, the base 2 is configured with the clamping groove 22 which adapts to the clamping plate 33. After the knob 3 is rotatably connected to the base 2 through the hinge portion, the clamping groove 22 is just directed to the knob 3, as shown, Figures 3-5 so that the clamping plate 33 can be screwed into the clamping groove 22 through the rotation of the knob 3, as shown, Figure 5 and Figure 7 so that the clamping plate 33 can be screwed out of the clamping groove 22 through the rotation of the knob 3, as shown, Figure 6 so as to unlock the fabric 7.

[0046] In the implementation, the clamping plate 33 is preferably configured as a plate structure, which not only makes the whole clamping plate 33 thinner, but also is more conducive to avoiding interference with the sewing machine, thereby being more conducive to sewing to the edge, and being more convenient for cooperating with the corresponding clamping groove 22 to realize better sewing effect. At the same time, in the implementation, the clamping groove 22 includes a top portion 221 and a side portion 222 connected to the top portion 221, and the side portion 222 is connected to the base 2 to form a laterally open clamping groove 22, as shown, Figure 3 and Figure 4 The opening is directed to the knob 3 to screw in and out the clamping plate 33.

[0047] In practice, the cross-sectional shape of the base 2 can be determined according to actual needs, and the base 2 can preferably be formed by an integral profile, such as an aluminum profile, a steel profile, etc. As an example, the lower surface of the base 2 can be configured as a horizontal plane, and the upper surface 38 of the base 2 can also be configured as a horizontal plane, and the knob 3 can be limited and constrained to the horizontal plane, so that the center of rotation of the knob 3 is distributed along the vertical direction. As another example, the lower surface of the base 2 can be configured as a horizontal plane, and the upper surface 38 of the base 2 can include an inclined surface 23 inclined to the horizontal plane, as shown in Figures 3-5 , the knob 3 can be limited and constrained to the inclined surface 23, so that the center 311 of the hinge hole is inclined to the vertical direction, and in the case where the center 311 of the hinge hole coincides with the center of rotation of the knob 3, the center of rotation of the knob 3 is also inclined to the vertical direction, and generally, the center of rotation of the knob 3 is perpendicular to the inclined surface 23; the clamping groove 22 is configured at the bottom end of the inclined surface 23 and is directed towards the inclined knob 3, as shown in Figures 3-5 , so that the side of the base 2 away from the clamping groove 22 has a greater height and thickness, as shown in Figure 3 , which can play a role in structurally strengthening the base 2 and significantly improve the rigidity of the base 2, and can improve the stability and reliability of the entire base 2; by inclining the center of rotation of the knob 3 to the vertical direction, and configuring the clamping groove 22 at the bottom end of the inclined surface 23 and directed towards the inclined knob 3, not only can the inclined knob 3 cooperate with the clamping groove 22, but also the knob 3 and the clamping groove 22 can cooperate at a lower position, closer to the sewing surface, which can further ensure the sewing to the edge and is less likely to interfere during sewing.

[0048] As shown in Figure 1 and Figure 2 , in the present embodiment, the profile of the clamping plate 33 includes an outer profile 34 on the side away from the knob 3, which in practice is configured as an arc structure to cooperate with the clamping groove 22 through the arc structure of the outer profile 34 and clamp the fabric 7. In practice, the arc structure can be a combined structure composed of multiple arcs, or it can be a single arc, for example, in the present embodiment, a single arc is used for processing and forming to ensure accuracy. In the present embodiment, the outer profile 34 is configured as a circular arc structure, and the center 341 of the outer profile coincides with the center of the hinge portion, i.e., the center of the circular arc structure coincides with the center of the hinge portion, as shown in Figure 2 , thereby facilitating the coincidence of the center of the circular arc structure with the center of rotation of the knob 3, so that the present knob 3 can clamp the fabric 7 not only in a clockwise direction but also in a counterclockwise direction, without the need to distinguish the direction during use, thereby making the clamping process simpler, more convenient and efficient.

[0049] In practice, the profile of the clamping plate 33 has various embodiments. For example, in one embodiment, the clamping plate 33 has a certain length so as to lengthen the clamping plate 33 and make it more suitable for sewing to the edge, as shown in Figure 1 and Figure 2 In this case, the two sides of the clamping plate 33 can further include two oppositely arranged side profiles 35, and the two ends of the outer profile 34 are connected to the two side profiles 35, as shown in Figure 9 In actual use, when the outer profile 34 of the clamping plate 33 is rotated into the clamping groove 22, the gap between the clamping plate 33 and the clamping groove 22 remains unchanged during the subsequent rotation process, and this design is more suitable for clamping fabrics 7 of a specific thickness range. Furthermore, the outer profile 34 and the side profile 35 are further configured with arc-shaped transition profiles 36, as shown in Figure 1 and Figure 2 On the one hand, this can prevent the profile of the clamping plate 33 from having sharp corners, thereby achieving the purpose of protecting the fabric 7, and on the other hand, it can gradually reduce the gap between the clamping plate 33 and the clamping groove 22 in the initial stage of the rotation of the clamping plate 33 into the clamping groove 22, so as to gradually clamp the fabric, which not only makes the clamping process smoother and more labor-saving, but also makes it more labor-saving to unlock the clamped fabric 7. In practice, the two arc-shaped transition profiles 36 can be symmetrically arranged at the two ends of the outer profile 34, as shown in Figure 1 and Figure 2 It can be understood that the arc-shaped transition profile 36 can be an arc or a combination of multiple arcs, which will not be illustrated one by one here.

[0050] In practice, since at least part of the clamping plate 33 can be rotated into the clamping groove 22, in one embodiment, the upper surface 38 of the clamping plate 33 is lower than the upper edge of the clamping groove 22 (i.e., the inner surface of the top 221 of the clamping groove 22, as shown in Figure 8 , so that there is a certain gap between the upper surface 38 of the clamping plate 33 and the upper edge of the clamping groove 22, as shown in Figure 8 , so as to clamp the fabric 7. In another embodiment, the outer profile 34 of the clamping plate 33 and the upper surface 38 of the clamping plate 33 are configured with a guide surface 37, as shown in Figure 8 In practice, the guide surface 37 can be an inclined surface 23 or an arc-shaped surface, as shown in Figure 8 . By configuring the guide surface 37, the clamping plate 33 can be clamped into the clamping groove 22 by the guide surface 37 during the rotation of the knob 3, so that in practice, the gap between the upper surface 38 of the clamping plate 33 and the upper edge of the clamping groove 22 can be reserved to be smaller, or even the upper surface 38 of the clamping plate 33 can be higher than the upper edge of the clamping groove 22, as shown in Figure 8As shown, so that a greater clamping force can be generated between the clamping plate 33 and the upper edge of the clamping groove 22, which is conducive to further clamping the fabric 7 by rotating the knob 3, and prevents the fabric 7 from falling off. Based on this embodiment, the clamping plate 33 can also be configured to have a certain elasticity, so that when the knob 3 is rotated, the guide surface 37 can more smoothly guide the clamping plate 33 to be clamped into the clamping groove 22, and generate a corresponding elastic pressure between the guide surface 37 and the upper edge of the clamping groove 22, achieving a better clamping effect.

[0051] In practice, the number of clamping plates 33 in the knob 3 can be determined according to actual needs. As an example, the side surface of the knob 3 can be configured with one clamping plate 33 that fits the clamping groove 22. As another example, the side surface of the knob 3 can be configured with two clamping plates 33 that fit the clamping groove 22, and the two clamping plates 33 are oppositely arranged so that the knob 3 has two opposite ends. In this embodiment, the center of rotation of the knob 3 can be located at the geometric center of the knob 3, that is, the center of the hinge can coincide with the geometric center of the knob 3, as shown in Figure 2 ; At this time, the two clamping plates 33 at the two ends of the knob 3 can be symmetrically arranged (which can be central symmetry or axial symmetry), as shown in Figure 3 ; so that in actual use, whether the knob 3 is rotated clockwise or counterclockwise, the fabric 7 can be clamped, thereby making the clamping process simpler, more convenient and efficient. In practice, the two clamping plates 33 can be connected to the knob 3 respectively, and when the width of the clamping plate 33 can be greater than the width of the knob 3, the two clamping plates 33 can be connected to each other while being connected to the knob 3, as shown in Figure 9 .

[0052] In a more perfect embodiment, the upper surface 38 of the base 2 is also configured with a containing groove 24, as shown in Figure 4 , Figure 5 , and Figure 8 ; The containing groove 24 is located on the inner side of the clamping groove 22 and communicates with the clamping groove 22, and is used to accommodate the edge of the fabric 7. When the knob 3 is rotated, the clamping plate 33 can pass from above the containing groove 24. The containing groove 24 can prevent the problem that the knob 3 cannot be rotated and clamped to the fabric 7 due to the fabric 7 being too thick, and is not easy to cause the fabric 7 to wrinkle due to the rotation of the knob 3. It can be applied to fabrics 7 of different thicknesses, and is conducive to achieving a more efficient and more reliable clamping effect. It can be understood that in practice, the base 2 can be provided with one or more knobs 3.

[0053] In use, the knob 3 can be rotated first so that the clamping plate 33 exits the clamping groove 22, and then the fabric 7 is placed on the base 2 and covers the clamping groove 22, and the edge of the fabric 7 falls into the containing groove 24, as shown in Figure 6As shown; then rotate knob 3, causing clamping plate 33 to gradually engage with slot 22. During this process, fabric 7 is gradually pressed between clamping plate 33 and the side 222 of slot 222, and simultaneously clamped between clamping plate 33 and the top 221 of slot 222, as shown. Figure 7 As shown. Even for fabrics 7 of varying thicknesses, the fabric 7 can be further clamped between the clamping plate 33 and the receiving groove 24. This clamping method and structure not only better holds the edges of the fabric 7, making sewing easier, but also prevents the clamped fabric 7 from slipping out of the clamp 1 under the tension perpendicular to the length of the base 2, thus preventing the fabric 7 from falling off during subsequent tensioning and sewing. In use, there is no need to hang the fabric 7 on the clamp 1; it can simply be laid on the slot 22. Furthermore, simply turning the knob 3 clamps or unlocks the fabric 7, making it very convenient and efficient to use.

[0054] Example 2

[0055] The main difference between this embodiment 2 and embodiment 1 is that this embodiment provides another type of knob 3. The clamping plate 33 structure of this knob 3 is different from that in embodiment 1. Specifically, in this embodiment, the center of the arc-shaped structure is offset from the center of the hinge portion, such as... Figures 10-13 As shown, the center of the arc structure is also offset from the rotation center of the knob 3, achieving the purpose of the eccentric design of the outer contour 34 of the clamping plate 33. During the process of locking the fabric 7, the gap between the outer contour 34 of the clamping plate 33 and the slot 22 will gradually decrease, making the locking process smoother and less strenuous. In addition, the process of locking and unlocking the fabric 7 is directional, so that the knob 3 can be driven according to the actual use scenario, so as to meet the different needs of different occasions, and the versatility and convenience are significantly improved. When the fabric 7 is clamped in the clamping plate 33 and the slot 22, if the fabric 7 is stretched or tightened in the direction of the clamping plate 33, the fabric 7 will become tighter and tighter. This can effectively prevent the knobs 3 from loosening and causing the fabric 7 to fall off during the stretching or tightening of the fabric 7 along the length of the base 2. If the fabric 7 is stretched or tightened in the opposite direction to the direction of the clamping plate 33, the movement of the fabric 7 can drive each knob 3 to rotate in the opposite direction. In some cases, the wrinkled fabric 7 can be further tightened, and after tightening, the clamping plate 33 can be screwed in to lock it, which is conducive to tightening the fabric 7 more conveniently, efficiently and effortlessly. In other cases, each knob 3 can be automatically unlocked, which is conducive to unlocking the fabric 7 very conveniently, efficiently and effortlessly.

[0056] In practice, the clamping plate 33 can be implemented in various ways. For example, in one implementation, the outer contour 34 of the clamping plate 33 can preferably be constructed as an elliptical arc structure, such as... Figure 10 and Figure 11As shown. Similarly, in implementation, the two ends of the elliptical arc structure can be connected to the knob 3 respectively. Furthermore, in implementation, the two sides of the clamping plate 33 can also include two oppositely arranged side contours 35. The two ends of the outer contour 34 can be directly connected to the two side contours 35, or they can be connected to the two side contours 35 through an arc-shaped transition contour 36. In a preferred embodiment, the two clamping plates 33 can be connected to form an ellipse, such as... Figure 11 As shown.

[0057] In another embodiment, the outer contour 34 of the clamping plate 33 can be constructed as an arc-shaped structure, and the center of the arc-shaped structure is offset from the rotation center of the knob 3, such as... Figure 12 As shown, to achieve an eccentric design, in a preferred embodiment, the diameter of the arc-shaped structure can be equal to or close to the maximum length of the knob 3. This ensures that during the rotation of the clamping plate 33 towards the slot 22, the gap between the outer contour 34 of the clamping plate 33 and the slot 22 decreases less when rotating by the same angle, thus facilitating smoother and more effortless clamping of the fabric 7. In this embodiment, the clamping plate 33 may also include two oppositely arranged side contours 35 on both sides. The two ends of the outer contour 34 can be directly connected to the two side contours 35, or they can be connected to the two side contours 35 through an arc-shaped transition contour 36, such as... Figure 12 As shown.

[0058] Similarly, in implementation, the knob 3 can preferably be equipped with one or two clamping plates 33. When the knob 3 is equipped with two clamping plates 33, the two clamping plates 33 can be arranged symmetrically, preferably using an axially symmetrical arrangement, such as... Figure 12 As shown, during use, the two clamps 33 can be pulled tighter and tighter along the length of the base 2, and the fabric 7 can be locked in both directions to meet the needs of use in different directions, thus improving versatility.

[0059] When using this clamp 1, first turn the knob 3 to disengage the clamp 33 from the slot 22, then place the fabric 7 on the base 2 and cover the slot 22. The edge of the fabric 7 will automatically fall into the receiving groove 24. Figure 6 As shown; then rotate knob 3, causing clamping plate 33 to gradually engage with slot 22. During this process, fabric 7 is gradually pressed between clamping plate 33 and the side 222 of slot 222, and simultaneously clamped between clamping plate 33 and the top 221 of slot 222, as shown. Figure 7As shown, the fabric 7 can be further clamped between the clamping plate 33 and the accommodating groove 24. This clamping manner and structure not only has various advantages described in Embodiment 1, but also, when the fabric 7 is pulled along the length direction of the base 2, if the pulling direction is the same as the direction in which the knob 3 is screwed in, the knob 3 will be pulled tighter and will not fall off. At the same time, when disassembled, only the fabric 7 needs to be pulled in the opposite direction, and each knob 3 can be automatically unlocked, which is very convenient and efficient, and can significantly improve the sewing efficiency.

[0060] Embodiment 3

[0061] The main difference between this embodiment 3 and the above-mentioned embodiments 1 or 2 is that the position of the knob 3 in the clamp 1 provided in this embodiment is adjustable. Specifically, in this embodiment, the base 2 is configured in a strip shape, as shown in Figure 14 The length of the base 2 can be determined according to actual needs, and is usually required to be greater than the maximum length or maximum width of the fabric 7 to be sewn. In practice, the length of the base 2 can be preferably 1m-5m, for example, 2.5m, 3m, 3.5m or 4m, etc. Correspondingly, the top portion 221 and the side portion 222 extend along the length of the base 2, respectively, so as to form the long strip-shaped clamping groove 22.

[0062] As shown in Figure 14 and Figure 15 In this embodiment, the base 2 is configured with a guide groove 21, which can be preferably configured on the upper surface 38 of the base 2. The guide groove 21 is parallel to the clamping groove 22, as shown in Figure 14 and Figure 15 At the same time, the base 2 is connected to a sliding member 51 through the connecting piece 4 adapted to the hinge portion, and the sliding member 51 is adapted to the guide groove 21 and is movably constrained in the guide groove 21. In this way, the knob 3 can be moved along the guide groove 21 through the cooperation of the sliding member 51 and the guide groove 21, so as to adjust the position of the knob 3 along the length direction of the base 2 according to actual needs. Moreover, at any position, the knob 3 can be rotated to form cooperation with the clamping groove 22, thereby significantly improving the versatility.

[0063] In a more specific embodiment, as shown in Figure 14 and Figure 15As shown, the sliding part 51 is provided with a threaded hole 511, the connecting member 4 is a bolt matched with the threaded hole 511, the sleeve 52 is arranged in the hinge hole 31, the gasket is arranged between the base 2 and the sleeve 52, the connecting member 4 is sequentially threaded through the sleeve 52 and the gasket and is screwed in the threaded hole 511, when the connecting member 4 is loosened, the sliding part 51 can drive the knob 3 to move along the guide groove 21 together, so as to adjust the position of the knob 3, when the connecting member 4 is tightened, the sliding part 51 can be locked, so as to prevent the sliding part 51 from moving, at this time, the knob 3 can rotate relative to the sleeve 52, so as to clamp or unlock the fabric 7.

[0064] Embodiment 4

[0065] The embodiment provides a quilting machine, which is provided with the clamp 1 described in any one of the embodiments 1-3. In the implementation, the number of the clamps 1 can be one or more, for example, as shown, four clamps 1 can be provided, the four clamps 1 form a rectangle, two adjacent clamps 1 can be fixedly installed, for example, fixedly installed on the rack 6, and the other two clamps 1 are respectively connected to the rack 6 through the air cylinders 61, so that the spacing between the two opposite clamps 1 can be adjusted through the air cylinders 61, so as to change the size of the rectangle formed by the four clamps 1, so that the fabric 7 can be tensioned in two directions, and fabrics 7 of different sizes can also be tensioned. Figure 16

[0066] The above merely describes the specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.​

Claims

1. A knob for a clamp, the knob configured with a grip portion, characterized in that, The knob is further configured with a hinge for realizing rotatable connection and a clamping plate matching the card slot, the clamping plate is configured on the side of the knob, the profile of the clamping plate comprises an outer profile facing away from the side of the knob, the outer profile is configured as an arc structure.

2. The knob for a clamp according to claim 1, wherein The outer profile is configured as a circular arc structure, the center of the circular arc structure coincides with the center of the hinge.

3. The knob for a clamp of claim 1, wherein, The center of the arc structure deviates from the center of the hinge.

4. The knob for a clamp of claim 3, wherein, The outer profile of the clamping plate is configured as an elliptical arc structure or a circular arc structure.

5. The knob for a clamp of claim 1, wherein, The profile of the clamping plate further comprises two oppositely arranged side profiles, the two ends of the outer profile are respectively connected with the side profiles.

6. The knob for a clamp of claim 5, wherein, The profile of the clamping plate further comprises an arc transition profile connecting the outer profile and the side profile.

7. The knob for a clamp of claim 1, wherein, A guide surface is configured between the outer profile and the upper surface of the clamping plate; The clamping plate is configured as a plate structure; The hinge is a hinge hole or a hinge shaft; The center of the hinge coincides with the geometric center of the knob; The side of the knob is configured with two clamping plates, and the two clamping plates are symmetrically arranged.

8. A clamp characterized in that, The knob comprising any one of claims 1-7 further comprises a base, the base is configured with a card slot matching the clamping plate, the knob is rotatably connected to the base through the hinge, the card slot faces the knob, and the clamping plate can be screwed into and out of the card slot through rotation of the knob.

9. The clamp of claim 8, wherein, The upper surface of the base comprises an inclined surface inclined to the horizontal aspect, the knob is limited by the inclined surface, so that the center of rotation of the knob is inclined to the vertical direction; the card slot is configured at the bottom end of the inclined surface and faces the inclined knob; And / or, the base is configured with a guide slot parallel to the card slot, the base is connected to a sliding member through a connecting piece matching the hinge, and the sliding member is movably constrained in the guide slot.

10. A quilting machine characterized by The knob comprising any one of claims 1-7 or the clamp comprising any one of claims 8-9.

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