Embroidery needle quick adjusting assembly

Abstract

The invention relates to an embroidery needle quick adjusting assembly, and belongs to the technical field of textile equipment, the embroidery needle quick adjusting assembly comprises a machine head, the lower side of the machine head is in positioning connection with the machine head through a positioning connection module, the positioning connection module comprises an assembly shell, and the assembly shell is provided with a multi-directional moving module for transferring and installing an embroidery needle; according to the invention, the positioning of the embroidery needle can be quickly completed through the positioning kit, so that the position of the embroidery needle groove can be quickly adjusted, and the embroidery needle groove can adapt to embroidery needles with different sizes, thereby avoiding the problem of difficulty in needle adjustment after needle replacement; the positioning connection module can be designed in a targeted mode according to the specific structure of an existing embroidery needle machine head, so that the matching degree is high, basic positioning can be completed, and the problem that positioning is difficult when the embroidery needle machine head is used every time is solved. And the adjusting module can adjust the position of the adjusting barrel according to the positions of embroidery needles of different devices, so that the adjusting barrel has higher adaptive capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile equipment, and relates to a quick adjusting assembly of embroidery needles. BACKGROUND

[0002] The embroidery machine is also called a computerized embroidery machine, which is the most advanced embroidery machine in the present age. The computerized embroidery machine can realize high speed and high efficiency of traditional hand embroidery and can also realize the requirements of "multi-level, multi-function, unity and perfection" which cannot be achieved by hand embroidery. The computerized embroidery machine is a kind of mechatronic product embodying multiple high-techs. With computerized embroidery replacing hand embroidery, the computerized embroidery machine will become the main type of embroidery machines.

[0003] However, the embroidery needle of the embroidery machine head is inconvenient to replace. The needle slot of the embroidery needle needs to be oriented in a specific direction during installation. At present, the needle is still manually installed and positioned. Since the needle is thin and the installation port is small, the embroidery needle often falls off and is lost, the installation port cannot be accurately found, and the needle slot cannot be accurately aligned, thereby affecting the work efficiency. SUMMARY

[0004] The present application provides a quick adjusting assembly of embroidery needles to solve the technical problems in the prior art.

[0005] The technical scheme for solving the above technical problems is as follows: a quick adjusting assembly of embroidery needles, comprising a machine head, the lower side of the machine head is positioned and connected with a positioning connection module, the positioning connection module comprises an assembly shell, a multidirectional movement module for transferring and installing the embroidery needle is arranged on the assembly shell, an adjusting module for adjusting the corresponding positions is arranged between the multidirectional movement modules, and a positioning set for positioning the embroidery needle is arranged in the adjusting module.

[0006] Preferably, the positioning connection module comprises the assembly shell, a positioning seat is fixedly arranged at the upper end of the assembly shell, a protrusion (not shown in the figure) capable of cooperating with the top groove of the connecting piece is rotatably arranged on the positioning seat, the connecting piece is used to fixedly connect the lower part of the machine head, a sliding groove is arranged at the rear side of the assembly shell, an inner cavity is arranged at the inner side, the inner cavity is connected with the multidirectional movement module and the adjusting module, one end of a telescopic rod is connected with a spring in the sliding groove, the other end of the telescopic rod extends out of the sliding groove and is fixedly connected with a hook, and the hook can position and fix the equipment at the current position by cooperating with the protrusion through the reset spring.

[0007] Preferably, the multidirectional movement module comprises a horizontal sliding rail fixedly arranged on the side wall of the cavity of the assembly shell, a horizontal sliding block is arranged on the horizontal sliding rail, a vertical sliding rail is fixedly arranged on the horizontal sliding block, a vertical sliding block is fixedly arranged on the vertical sliding rail, the horizontal sliding rail and the vertical sliding rail are arranged at a right angle, and the vertical sliding block is fixedly connected with the adjusting module.

[0008] As a preferred, the adjusting module comprises a mounting plate fixed on the multi-directional moving module, a through slot is arranged in the middle of the mounting plate, an adjusting barrel is slidably arranged in the through slot, the adjusting barrel is hollow inside and the size of the adjusting barrel is smaller than the width of the through slot, a lower fixing ring is arranged at the middle position of the adjusting barrel, the size of the lower fixing ring is larger than the width of the through slot, a screw thread is arranged on the upper side of the adjusting barrel, an extrusion screw block is matched with the screw thread, the extrusion screw block can complete the compression and fixation of the mounting plate with the lower fixing ring, a rotating groove is arranged on the lower side of the adjusting barrel, the rotating groove is communicated with the through slot inside the adjusting barrel, but does not penetrate the whole section of the adjusting barrel, a friction strip is slidably arranged in the rotating groove, an adjusting plate is fixedly connected to a section on the outer side of the friction strip, an adjusting knob is threadedly matched with the adjusting plate, the other end of the adjusting knob is rotatably connected with a sliding plate, and the sliding plate horizontally slides on the lower end surface of the mounting plate.

[0009] As a preferred, the positioning set comprises a limiting block slidably arranged in the middle of the adjusting barrel, the lower part of the outer side of the limiting block is inclined inward, and the limiting block is composed of left and right halves, the junction of the two halves is connected by a spring, the outer side of the inclined surface of the limiting block abuts against an adjusting ring, the adjusting ring is hollow annular as a whole, an operating plate is further fixedly arranged on the outer side of the adjusting ring, the operating plate extends out of the outer side of the adjusting barrel through the through hole at the corresponding position of the adjusting barrel, and clamping grooves for fixing the height of the operating plate are further arranged on both sides, a slotted hole is arranged on the inner side wall of the lower end of the adjusting barrel, a positioning block is slidably connected in the slotted hole through a return spring, and the width of the positioning block matches the size of the thread groove on the embroidery needle.

[0010] As a preferred, a material capable of improving friction is fixedly arranged on the end surface of the friction strip close to the side of the adjusting barrel.

[0011] As a preferred, a horn opening is arranged on the upper end of the limiting block to facilitate the insertion of the embroidery needle.

[0012] As a preferred, the inner surface of the limiting block is inclined from wide to narrow to better limit the embroidery needle.

[0013] As a preferred, the adjusting module further comprises a sliding rod slidably arranged on the rear side of the mounting plate, the sliding rod is located at both ends of the mounting plate, a supporting plate is fixedly arranged on the lower end of the sliding rod, and the supporting plate extends to the lower end of the adjusting barrel.

[0014] As a preferred, a needle seat connected with other mechanisms inside is arranged on the lower side of the machine head, an embroidery needle is arranged at the central position of the needle seat, a fixing screw is threadedly connected on the needle seat perpendicular to the embroidery needle, and the fixing screw can compress the embroidery needle.

[0015] The beneficial effects of the present invention are: 1. The invention can quickly complete the positioning of the embroidery needle through the positioning kit, so that the position of the embroidery needle groove can be quickly adjusted, and can adapt to embroidery needles of different sizes, thereby avoiding the problem of difficulty in adjusting the needle after changing the needle; 2. The positioning connection module can be specifically designed according to the specific structure of the existing embroidery needle machine head, so that it has a high degree of fit and can complete basic positioning, and there will be no problem of difficulty in positioning each time it is used; 3. The adjustment module can adjust the position of the adjustment barrel according to the embroidery needle position of different equipment, so that it can have higher adaptability; 4. The multi-directional movable module can be installed externally, and the embroidery needle can be transferred and installed after adjustment, thereby assisting in completing the quick installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle; Figure 3 It is a schematic structural diagram of the lower part of the present invention; Figure 4 This is a structural schematic diagram of the lower part of the present invention from another angle; Figure 5 This is a partial structural diagram of the "regulating module" of the present invention; Figure 6 for Figure 5 Schematic diagram of the cross-section structure at the central axis; Figure 7 for Figure 5 Enlarged schematic diagram of the structure at "A".

[0017] In the accompanying drawings, the components represented by the reference numerals are as follows: Machine head 10, component housing 12, telescopic rod 13, connecting part 14, support plate 15, adjusting knob 16, sliding plate 17, friction strip 18, mounting plate 19, lower fixing ring 20, adjusting barrel 21, rotating groove 22, operating panel 23, extrusion screw block 24, positioning block 25, adjusting ring 26, limiting block 27, horizontal slide rail 28, vertical slide rail 29, fixing screw 30, embroidery needle 31, needle seat 32, positioning seat 33, hook 34, positioning slot 35, adjusting plate 36, slide rod 37. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0019] In the description of the present application, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0020] In the description of the present application, the term "for example" is used to indicate "as an example, instance, or illustration". Any embodiment described as "for example" in this application is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be appreciated that one of ordinary skill in the art can realize and implement the application without using these specific details. In other instances, well-known structures and processes have not been described in detail in order to avoid obscuring the description of the application. Therefore, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

[0021] With reference to Figure 1 - Figure 7 A quick adjusting assembly of embroidery needle, comprising a head 10, the lower side of the head 10 is positioned and connected with a positioning connection module, the positioning connection module comprises an assembly shell 12, a multi-directional movement module for transferring and installing embroidery needle is arranged on the assembly shell 12, an adjusting module for adjusting the corresponding position is arranged between the multi-directional movement module, a positioning set capable of positioning the embroidery needle is arranged in the adjusting module.

[0022] The positioning connection module includes the component shell 12, the upper end of the component shell 12 is fixedly provided with a positioning seat 33, the positioning seat 33 is rotatably provided with a protrusion (not shown in the figure) that can cooperate with the top groove of the connecting member 14, the shape of the protrusion is adapted to the concave shape of the connecting member 14, which can well achieve the purpose of positioning and cooperation, thereby ensuring that it is quick and simple to use again after the other modules are positioned. The connecting member 14 is used to fix the lower part of the head 10. The connecting member 14 is the basic connecting member of the head 10, which connects the front and rear back plates on the lower side of the head 10 together and takes this as the positioning base point, which can ensure that the base point is close to the installation position, the component is relatively compact, and the positioning is relatively simple, reliable and intuitive, and the workers The principle of equipment positioning can be understood without complex training, and the operation is convenient. A slide groove is provided on the rear side of the component housing 12 and a cavity is provided on the inner side. The cavity is connected to the adjustment module through a multi-directional movable module. The modules are connected to each other to form the entire component. One end of the telescopic rod 13 is connected to the slide groove by a spring, and the other end of the telescopic rod 13 extends out of the slide groove and is fixedly connected to a hook 34. The hook 34 can position and fix the device in the current position through the reset spring and the protrusion; when the device needs to be positioned, the hook 34 is pulled out so that it and the positioning seat 33 are located on both sides of the front and rear plates on the lower side of the machine head 10, and the protrusion on the positioning seat 33 is matched with the corresponding recess of the connecting member 14 to complete the positioning.

[0023] The multi-directional movable module includes a horizontal slide rail 28 fixedly arranged on the side wall of the cavity of the component housing 12, and a horizontal slider is provided on the horizontal slide rail 28, and a vertical slide rail 29 is fixedly provided on the horizontal slider, and a vertical slider is fixedly provided on the vertical slide rail 29. The installation requirements of the horizontal slide rail 28 and the horizontal slide rail 28 are relatively high. If the horizontal and vertical installation accuracy is not enough, it will cause greater wear during work or poor working effect, and the installation on the left and right sides must be symmetrical, otherwise the above problems will also occur. The setting angles of the horizontal slide rail 28 and the vertical slide rail 29 are vertical, and an adjustment module is fixedly connected to the vertical slider; when the adjusted embroidery needle needs to be installed in the installation position of the machine head 10, the horizontal slide rail 28 and the degree of freedom provided by the horizontal slide rail 28 can be used to realize the downward movement of the adjustment module and the horizontal movement to the corresponding position, thereby facilitating subsequent work.

[0024] The adjusting module comprises a mounting plate 19 fixed on the multi-direction moving module, a through slot is arranged in the middle of the mounting plate 19, an adjusting barrel 21 is slidably arranged in the through slot, the adjusting barrel 21 is hollow inside and the size of the adjusting barrel 21 is smaller than the width of the through slot, the size of the adjusting barrel 21 smaller than the through slot can ensure that the position of the adjusting barrel 21 in the slot can be changed, so as to change the position of the embroidery needle, so as to adapt to the equipment with different needle numbers or different needle widths, a lower fixing ring 20 is arranged at the middle position of the adjusting barrel 21, the size of the lower fixing ring 20 is larger than the width of the through slot, a thread is arranged on the upper side of the adjusting barrel 21, a pressing screw block 24 is matched with the thread, the pressing screw block 24 can complete the compression and fixation of the mounting plate 19 with the lower fixing ring 20, after the pressing screw block 24 and the lower fixing ring 20 compress the mounting plate 19, the adjusting barrel 21 can be fixed, the fixed position of the adjusting barrel 21 is determined according to the mounting position of the embroidery needle on the lower side of the machine head 10, a rotating groove 22 is arranged on the lower side of the adjusting barrel 21, the rotating groove 22 is communicated with the internal through slot of the adjusting barrel 21, but does not penetrate the whole section of the adjusting barrel 21, in this way, the embroidery needle inside can be exposed, so as to realize cooperation with other components, a friction strip 18 is slidably arranged in the rotating groove 22, one end of the friction strip 18 is fixedly connected with an adjusting plate 36, the adjusting plate 36 is screwedly matched with an adjusting knob 16, the other end of the adjusting knob 16 is rotationally connected with a sliding plate 17, in this way, the depth of the friction strip 18 in the rotating groove 22 can be adjusted, so as to adapt to embroidery needles with different sizes, the sliding plate 17 horizontally slides on the lower end surface of the mounting plate 19; when adjustment is needed, the adjusting barrel 21 is slid to the corresponding position of the mounting plate 19, then the pressing screw block 24 is screwed tightly, so as to fix the adjusting barrel 21, during the fixing process, the rotating groove 22 needs to be directed towards the friction strip 18, then the depth of the friction strip 18 in the rotating groove 22 is adjusted, after completion, the horizontal movement of the sliding plate 17 can be used to move the friction strip 18 in the rotating groove 22, so as to rotate the needle in the adjusting barrel 21.

[0025] The positioning kit comprises a limiting block 27 sliding in the middle of the adjusting barrel 21, the outer lower surface of the limiting block 27 is inclined inward, and the limiting block 27 is composed of left and right halves, the joint of which is connected by a spring, the outer inclined surface of the limiting block 27 abuts against an adjusting ring 26, the adjusting ring 26 is a hollow ring as a whole, in this way, the position of the two limiting blocks 27 can be controlled by controlling the adjusting ring 26, when the limiting blocks 27 are close to each other, the space in the middle of the adjusting barrel 21 is reduced, only allowing thinner needles to pass through, thereby realizing the placement of embroidery needles sliding out of the adjusting barrel 21 by limiting the position of the thicker part of the upper end of the embroidery needle, and the adjustable mode can still be applicable after changing the embroidery needle, the outer side of the adjusting ring 26 is further fixedly provided with an operation plate 23, the operation plate 23 extends out of the outer side of the adjusting barrel 21 through the through hole of the corresponding position of the adjusting barrel 21, and the both sides are further provided with a clamping groove 35 for fixing the height of the operation plate 23, fixing the operation plate 23 in the clamping groove 35 can keep the distance between the limiting blocks 27 through the adjusting ring 26, avoiding mechanism reset during operation, the inner wall surface of the lower end of the adjusting barrel 21 is provided with a slot, and a positioning block 25 is slidingly connected in the slot through a reset spring, the width of the positioning block 25 matches the size of the thread groove on the embroidery needle; when the positioning of the embroidery needle needs to be completed, the height of the adjusting ring 26 can be changed by adjusting the operation plate 23, thereby changing the distance between the limiting blocks 27 through the inclined surface, and after adjusting to the position, the operation plate 23 is rotated to fall in the clamping groove 35, thereby completing the fixing, then the embroidery needle is inserted, the tip of the embroidery needle falls to the lower side of the limiting block 27, and the upper end is limited by the limiting block 27, the embroidery needle is rotated by the adjusting module, when the thread groove of the embroidery needle reaches the predetermined position, the positioning block 25 is clamped therein so that the needle cannot continue to rotate, the continuous sliding of the adjusting module drives other needles to also complete similar actions, the above-mentioned method is simple and fast, the operator can quickly and skillfully use it, the device has high reliability, is easy to use, has low training cost, has no driving part, has low cost, and does not depend on power supply, compressed air and other supporting equipment.

[0026] The end surface of the friction strip 18 close to one side of the adjusting barrel 21 is fixedly provided with a material capable of improving friction, such as a rubber layer.

[0027] The upper end of the limiting block 27 is provided with a horn opening for facilitating the insertion of the embroidery needle.

[0028] The inner surface of the limiting block 27 is inclined from wide to narrow, so as to better limit the embroidery needle.

[0029] The adjusting module further comprises a sliding rod 37 slidingly arranged at the rear side of the mounting plate 19, the sliding rod 37 is located at both ends of the mounting plate 19, the lower end of the sliding rod 37 is fixedly provided with a support plate 15, and the support plate 15 extends to the lower end of the adjusting barrel 21.

[0030] The lower side of the machine head 10 is provided with a needle seat 32 connected with other internal mechanisms, a embroidery needle 31 is arranged at the center position of the needle seat 32, a fixing screw 30 is threadedly connected on the needle seat 32 perpendicular to the embroidery needle 31, and the fixing screw 30 can press the embroidery needle 31.

[0031] Work flow: after the positioning and connecting module completes the basic fixing of the equipment, the position of the adjusting barrel 21 and the distance of the limiting block 27 are adjusted through the adjusting module, then the embroidery needles are inserted into the adjusting barrel 21, the positioning of the whole row of embroidery needles is completed through the cooperation of the friction strip 18 of the adjusting module and the positioning sleeve, then the embroidery needles after positioning are moved to the lower side of the needle seat 32 through the multi-directional moving module, then the embroidery needles 31 are pushed into the needle seat 32 from the needle tip part through lifting the supporting plate 15, and finally all the embroidery needles 31 are fixed through screwing the fixing screw 30.

[0032] Although the preferred embodiments of the present application have been described, those skilled in the art who understand the basic inventive concept can make additional changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0033] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, it is intended that the present application cover the modifications and changes as falling within the scope of the claims and their equivalents.

Claims

1. An embroidery needle quick-adjustment assembly, comprising a machine head (10), characterized in that: The lower side of the machine head (10) is positioned and connected to the machine head via a positioning connection module, the positioning connection module comprising a component housing (12), a multi-directional movable module for transferring and installing embroidery needles being provided on the component housing (12), an adjustment module for adjusting relevant corresponding positions being provided between the multi-directional movable modules, and a positioning kit capable of completing the positioning of the embroidery needles being provided in the adjustment module.

2. The embroidery needle quick-adjustment assembly according to claim 1, characterized in that: The positioning connection module includes the component housing (12), the upper end of the component housing (12) is fixedly provided with a positioning seat (33), the positioning seat (33) is rotatably provided with a protrusion that can cooperate with the top groove of the connecting member (14), and the connecting member (14) is used to fixedly connect the lower part of the head (10), the rear side of the component housing (12) is provided with a slide groove, and the inner side is provided with a cavity, and the cavity is connected to the adjustment module through a multi-directional moving module, and one end of the telescopic rod (13) is connected to the slide groove through a spring, and the other end of the telescopic rod (13) extends out of the slide groove and is fixedly connected to a hook (34), and the hook (34) can cooperate with the protrusion through a reset spring to position and fix the device at the current position.

3. The embroidery needle quick-adjustment assembly according to claim 1, characterized in that: The multi-directional movable module comprises a horizontal slide rail (28) fixedly arranged on the side wall of the cavity of the component housing (12); a horizontal slider is arranged on the horizontal slide rail (28); a vertical slide rail (29) is fixedly arranged on the horizontal slider; a vertical slider is fixedly arranged on the vertical slide rail (29); the horizontal slide rail (28) and the vertical slide rail (29) are arranged at a vertical angle; and an adjustment module is fixedly connected to the vertical slider.

4. The embroidery needle quick-adjustment assembly according to claim 1, characterized in that: The adjustment module comprises a mounting plate (19) fixed on the multi-directional movable module, a through slot is provided in the middle of the mounting plate (19), an adjustment barrel (21) is slidably provided in the through slot, the interior of the adjustment barrel (21) is hollow and the size of the adjustment barrel (21) is smaller than the width of the through slot, a lower fixing ring (20) is provided at the middle position of the adjustment barrel (21), the size of the lower fixing ring (20) is larger than the width of the through slot, a thread is provided on the upper side of the adjustment barrel (21), and the thread section is matched with an extrusion screw block (24), and the extrusion screw block (24) can complete the adjustment of the mounting plate (19) with the lower fixing ring (20). The adjusting barrel (21) is pressed and fixed, and a rotation groove (22) is provided on the lower side of the adjusting barrel (21). The rotation groove (22) is connected to the internal through groove of the adjusting barrel (21), but does not pass through the entire cross section of the adjusting barrel (21). A friction strip (18) is slidably provided in the rotation groove (22), and an outer section of the friction strip (18) is fixedly connected to an adjusting plate (36). The adjusting plate (36) is threadedly fitted with an adjusting knob (16). The other end of the adjusting knob (16) is rotatably connected to the sliding plate (17), and the sliding plate (17) slides horizontally on the lower end surface of the mounting plate (19).

5. The embroidery needle quick-adjustment assembly according to claim 4, characterized in that: The positioning kit includes a limiting block (27) sliding in the middle of the adjusting barrel (21), the outer lower surface of the limiting block (27) is inclined inward, and the limiting block (27) is composed of left and right halves, and the two are connected by a spring. The outer side of the inclined surface of the limiting block (27) abuts against an adjusting ring (26), and the adjusting ring (26) is hollow and annular. An operating plate (23) is fixedly provided on the outer side of the adjusting ring (26), and the operating plate (23) extends out of the adjusting barrel (21) through a through hole at a corresponding position on the above-mentioned adjusting barrel (21), and a card slot (35) for fixing the height of the operating plate (23) is provided on both sides. A slot is provided on the inner wall surface of the lower end of the adjusting barrel (21), and a positioning block (25) is slidably connected to the slot through a return spring. The width of the positioning block (25) matches the size of the thread groove on the embroidery needle.

6. The embroidery needle quick-adjustment assembly according to claim 4, characterized in that: A material capable of increasing friction is fixedly provided on the end surface of the friction strip (18) on the side close to the regulating barrel (21).

7. The embroidery needle quick-adjustment assembly according to claim 5, characterized in that: The upper end of the limiting block (27) is provided with a trumpet mouth for the embroidery needle to extend into.

8. The embroidery needle quick-adjustment assembly according to claim 5, characterized in that: The inner surface of the limiting block (27) is wide at the top and narrow at the bottom and is tilted.

9. The embroidery needle quick-adjustment assembly according to claim 1, characterized in that: The adjustment module further includes a slide bar (37) slidably arranged on the rear side of the mounting plate (19), the slide bar (37) being located at both ends of the mounting plate (19), a support plate (15) being fixedly arranged at the lower end of the slide bar (37), and the support plate (15) extending to the lower end of the adjustment barrel (21).

10. The embroidery needle quick-adjustment assembly according to claim 1, characterized in that: A needle seat (32) connected to other internal mechanisms is provided on the lower side of the machine head (10); an embroidery needle (31) is provided at the center of the needle seat (32); a fixing screw (30) is threadedly connected to the needle seat (32) perpendicular to the embroidery needle (31); and the fixing screw (30) can press the embroidery needle (31).

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