Pipe fitting quick connection structure and water outlet device

Abstract

The utility model discloses a pipe fitting quick connection structure and a water outlet device, the pipe fitting quick connection structure comprises an upper joint, a lower joint, a sliding barrel and an elastic piece, the upper joint comprises a plug part, the peripheral wall of the upper joint is provided with a first flange, the lower joint comprises a socket part and an elastic arm, the sliding barrel and the elastic piece, the plug part can be inserted into or separated from the socket part, the upper end of the elastic arm is provided with a stress block, and the elastic arm is provided with a second flange. A guide slope is formed on the inner side of the stress block, a third flange is arranged on the inner wall of the sliding barrel in the circumferential direction, and an ejection rib is arranged at the upper end of the inner side of the sliding barrel. When the socket is assembled, the second abutting plane of the sliding barrel abuts against the first abutting plane of the stress block, the first flange abuts against the bottom of the stress block, and when the socket is disassembled, the ejection rib ejects the stress block along the guide inclined plane to enable the elastic arm to bend outwards, so that the plug part is separated from the socket part.

Description

TECHNICAL FIELD

[0001] The utility model relates to bathroom product technical field, especially a pipe fitting quick -joint structure and water outlet device. BACKGROUND

[0002] The connecting mode between pipe fittings in prior art is various, and is mainly divided into fixed connection and detachable movable connection, the fixed connection has welding, bonding or hot melting etc, but the connection is not beneficial to disassembly and assembly, the movable connection mode has screwing, clamping, sleeve connection etc, and can be repeatedly disassembled and assembled, and is very flexible to use, such as the connection between the flexible pipe commonly used for connecting water supply pipe and water outlet terminal (such as faucet, shower head etc. SUMMARY

[0003] The utility model discloses at least one of the above technical problems in the related art is solved to some extent.

[0004] To achieve the above object, the technical scheme of the utility model is as follows:

[0005] The utility model further discloses a water outlet device with the pipe fitting quick -joint structure.

[0006] According to the pipe fitting quick -joint structure of the first aspect embodiment of the utility model, comprising:

[0007] The upper joint comprises a plug portion, and the plug portion is tubular, and a first flange is arranged on the outer peripheral wall of the plug portion;

[0008] The lower joint comprises a socket portion and an elastic arm, a water passing cavity is formed in the inner side of the socket portion, the plug portion can be inserted into or separated from the socket portion, the elastic arm is at least two and is arranged along the circumference of the socket portion, the upper end of the elastic arm is provided with a force receiving block, a guide inclined surface is formed in the inner side of the force receiving block, and a first abutting plane downward in direction is formed in the outer side of the force receiving block;

[0009] The sliding barrel is slidably sleeved on the lower joint, a third flange is arranged on the inner wall of the sliding barrel along the circumference, the top of the third flange is provided with a second abutting plane, and the upper end of the inner side of the sliding barrel is provided with an ejection rib;

[0010] The elastic member is abutted between the sliding barrel and the lower joint to provide the sliding barrel with upward elastic force;

[0011] The sliding barrel can be moved downward from the first position to the second position, and the elastic member is compressed during the downward movement of the sliding barrel, when the sliding barrel is located at the first position, the second abutting plane abuts against the first abutting plane, and the first flange abuts against the bottom of the force block, when the sliding barrel is located at the second position, the ejection rib pushes the force block along the guide inclined surface to make the elastic arm bend outward, so that the plug part is separated from the socket part.

[0012] According to the pipe quick connection structure, at least the following beneficial effects are achieved:

[0013] 1. The pipe quick connection structure can realize quick assembly and disassembly, when not assembled, the sliding barrel is located at the first position, the second abutting plane abuts against the first abutting plane under the action of the elastic member, so that the sliding barrel cannot be separated from the lower connector; when assembled, the sliding barrel is moved to the second position, during the process, the ejection rib abuts against the guide inclined surface to make the elastic arm expand outward, the axial movement of the sliding barrel is converted into the radial expansion force of the elastic arm through the inclined surface, after the elastic arm expands outward, the plug part can be conveniently inserted into the socket part, then the sliding barrel is pulled or directly released, and the sliding barrel is reset to the first position under the action of the elastic member, during the process, the elastic arm retracts because the extrusion force of the ejection rib is lost, the force block clamps the first flange, the upward movement of the plug part is limited, so that the plug part is fixedly assembled in the socket part and cannot be separated.

[0014] 2. The sliding barrel is assembled and fixed with the lower connector through the interaction of the sliding barrel, the elastic member and the elastic arm, the third flange of the sliding barrel is in plane contact with the first abutting plane, wear is small, compared with the circular smooth flange and the recess embedded fixing, the service life of the parts of the structure is longer, the durability of the quick connection structure is increased.

[0015] According to some embodiments of the utility model, the bottom of the force block has a third abutting plane, the top of the first flange has a fourth abutting plane, and when the sliding barrel is located at the first position, the third abutting plane and the fourth abutting plane abut against each other.

[0016] According to some embodiments of the utility model, the outer side of the force block has an outer side surface perpendicular to the first abutting plane, the outer side surface is located below the first abutting plane, and when the sliding barrel is located at the first position, the inner side surface of the third flange is in gap cooperation with the outer side surface.

[0017] According to some embodiments of the utility model, the ejection rib is circular ring body structure, located the top of inside of slide bucket and with slide bucket coaxial, the ejection rib with slide bucket between through connecting rib connection, the lower edge of ejection rib is round, the lower edge abuts against the guide inclined plane in the process that slide bucket moves from first position to second position, make the forced block move outward.

[0018] According to some embodiments of the utility model, the outer peripheral wall of the plug portion is further provided with a fourth flange, the fourth flange is located above the first flange, when the slide bucket is located at the first position, the fourth flange is opposite to the guide inclined plane, the inner side of the ejection rib has a first inner peripheral wall and a second inner peripheral wall, the first inner peripheral wall is located above the second inner peripheral wall, the diameter of the first inner peripheral wall is larger than the diameter of the second inner peripheral wall, the diameter of the fourth flange is larger than the diameter of the second inner peripheral wall and smaller than the diameter of the first inner peripheral wall, in the process that the slide bucket moves from the first position to the second position, the second inner peripheral wall can be subjected to the outward thrust of the fourth flange to make the ejection rib bend outward to open the elastic arm.

[0019] According to some embodiments of the utility model, the outer peripheral wall of the socket portion is provided with a second flange, the elastic member is a spring, the spring is sleeved on the socket portion, the lower end of the spring abuts against the second flange, and the upper end of the spring abuts against the third flange.

[0020] According to some embodiments of the utility model, the stroke L1 from the first position to the second position is smaller than the distance L2 from the uppermost end of the forced block to the uppermost end of the slide bucket when the slide bucket is located at the first position.

[0021] According to some embodiments of the utility model, when the slide bucket is located at the first position, the lowermost end of the slide bucket is flush with the lowermost end of the second flange.

[0022] According to some embodiments of the utility model, the outer peripheral wall of the plug portion is sleeved with a sealing ring, when the plug portion is inserted into the socket portion, the sealing ring can block the gap between the plug portion and the socket portion.

[0023] The water outlet device according to the second aspect of the embodiments of the utility model comprises the pipe quick connection structure.

[0024] Additional aspects and advantages of the utility model will be in part apparent and in part pointed out hereinafter in the description. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings of which:

[0026] Figure 1 is an explosion view of the pipe quick connection structure of the utility model;

[0027] Figure 2 is an assembled cross-sectional view of the pipe quick connection structure of the utility model (the sliding barrel is located at the first position);

[0028] Figure 3 is a pre-disassembled cross-sectional view of the pipe quick connection structure of the utility model (the sliding barrel is located at the second position);

[0029] Figure 4 is a cross-sectional view of the pipe quick connection structure of the utility model in the process of loosening the plug-in part (the sliding barrel is located at the second position);

[0030] Figure 5 is a cross-sectional view of the pipe quick connection structure of the utility model in the process of completely loosening the plug-in part (the sliding barrel is located at the first position);

[0031] Figure 6 is a first perspective view of the lower connector of the utility model;

[0032] Figure 7 is a second perspective view of the lower connector of the utility model;

[0033] Figure 8 is a three-dimensional cross-sectional view of the sliding barrel of the utility model;

[0034] Figure 9 is a structure view of the upper connector of the utility model.

[0035] Reference signs: upper connector 100, first pipe connection part 200, plug-in part 300, first flange 310, fourth abutting plane 311, fourth flange 320, sealing ring 330, lower connector 400, second pipe connection part 500, socket part 600, water passage cavity 610, second flange 620, elastic arm 700, stress block 710, guide inclined surface 711, first abutting plane 712, third abutting plane 713, outer side surface 714, sliding barrel 800, third flange 810, second abutting plane 811, inner side surface 812, ejection rib 820, lower edge 821, first inner circumferential wall 822, second inner circumferential wall 823, connecting rib 830, elastic member 900, handle 1000, hose 1100. DETAILED DESCRIPTION

[0036] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0037] Reference Figures 1-9 A pipe joint structure, comprising:

[0038] An upper joint 100, comprising a plug part 300, the plug part 300 is tubular, and a first flange 310 is arranged on the outer circumferential wall of the plug part 300;

[0039] A lower joint 400, comprising a socket part 600 and elastic arms 700, a water passing cavity 610 is formed on the inner side of the socket part 600, the plug part 300 can be inserted into or separated from the socket part 600, when the plug part 300 is inserted into the socket part 600, the upper joint 100 and the lower joint 400 are communicated, the elastic arms 700 are at least two and arranged along the circumference of the socket part 600, the upper end of the elastic arms 700 is provided with a force receiving block 710, a guide inclined surface 711 is formed on the inner side of the force receiving block 710, and a first abutting plane 712 downwardly directed is formed on the outer side of the force receiving block 710;

[0040] A sliding barrel 800, which is sleeve-shaped, is sleeved on the lower joint 400 in a slidable manner, a third flange 810 is arranged on the inner wall of the sliding barrel 800 along the circumference, the top of the third flange 810 is provided with a second abutting plane 811, the socket part 600 and the elastic arms 700 are located in the sliding barrel 800, and an ejection rib 820 is arranged on the upper end of the inner side of the sliding barrel 800;

[0041] An elastic member 900, which is abutted between the sliding barrel 800 and the lower joint 400, provides an upward elastic force to the sliding barrel 800;

[0042] The sliding barrel 800 can be moved downwardly from a first position to a second position, and the elastic member 900 is compressed in the process of the downward movement of the sliding barrel 800, when the sliding barrel 800 is located at the first position, the second abutting plane 811 is abutted to the first abutting plane 712, and the first flange 310 is abutted to the bottom of the force receiving block 710, when the sliding barrel 800 is located at the second position, the ejection rib 820 pushes open the force receiving block 710 along the guide inclined surface 711 to make the elastic arms 700 bend outwardly, so that the plug part 300 is separated from the socket part 600.

[0043] Working principle: when not assembled, the sliding barrel 800 is located at the first position, the second abutting plane 811 abuts against the first abutting plane 712 under the action of the elastic element 900, so that the sliding barrel 800 cannot be pulled out of the lower connector 400; when assembled, the sliding barrel 800 is pulled to the second position, in this process, the ejection rib 820 abuts against the guide inclined surface 711 to make the elastic arm 700 expand outward, and the axial movement of the sliding barrel 800 is converted into the radial expansion force of the elastic arm 700 through the inclined surface, after the elastic arm 700 expands outward, the plug-in part 300 can be conveniently inserted into the socket part 600, and then the sliding barrel 800 is pulled or directly released, and the sliding barrel 800 is reset to the first position under the action of the elastic element 900, in this process, the elastic arm 700 retracts due to the loss of the extrusion force of the ejection rib 820, the force block 710 clamps the first flange 310, and the upward movement of the plug-in part 300 is limited, so that the plug-in part 300 is fixedly assembled in the socket part 600 and cannot be pulled out; the disassembly process is similar to the assembly process, the sliding barrel 800 is moved to the second position, the elastic arm 700 is expanded due to the extrusion of the ejection rib 820, the force block 710 is separated from the first flange 310, and the plug-in part 300 can be separated from the socket part 600 without obstacles, and finally the sliding barrel 800 is released to return to the first position.

[0044] In some embodiments of the utility model, the upper connector 100 further includes a first pipe connecting part 200, the first pipe connecting part 200 is located above the plug-in part 300, and the lower connector 400 further includes a second pipe connecting part 500, the second pipe connecting part 500 is located below the socket part 600. The first pipe connecting part 200 and the second pipe connecting part 500 are both hollow structures for connecting with external pipes. It can be understood that the upper connector 100 and the pipe can be an integral structure or a split structure, if it is an integral structure, the upper connector 100 does not have the first pipe connecting part 200, and the plug-in part 300 is directly integrally formed with the pipe, if it is a split structure, the upper connector 100 can be provided with the first pipe connecting part 200 for connecting with the pipe.

[0045] In some embodiments of the utility model, the bottom of the force block 710 has a third abutting plane 713, the top of the first flange 310 has a fourth abutting plane 311, and the third abutting plane 713 abuts against the fourth abutting plane 311 when the sliding barrel 800 is located at the first position. The force block 710 and the first flange 310 are in plane contact, which is not easy to form a guide and slip off, reduces the risk of separation, and increases the firmness of the quick connection structure.

[0046] In some embodiments of the utility model, the outer side of stress block 710 has outer side surface 714 perpendicular to first abutting plane 712, outer side surface 714 is below first abutting plane 712, when slide barrel 800 is in first position, inner side surface 812 of third flange 810 is gap matched with outer side surface 714. When upper joint 100 is subjected to the force of being pulled out of lower joint 400 (hand pulling or water flow impact force), fourth abutting plane 311 will drive third abutting plane 713 to move, so that stress block 710 is stressed and expanded, but because inner side surface 812 of third flange 810 greatly limits the expansion distance of outer side surface 714 of stress block 710, the degree of expansion of stress block 710 cannot satisfy that fourth abutting plane 311 and third abutting plane 713 are completely separated, and then plug-in part 300 is still unable to be pulled out of socket part 600, which greatly improves the assembly firmness of quick connection structure.

[0047] In some embodiments of the utility model, the ejection rib 820 is a circular ring body structure, which is located at the top of the inner side of the slide barrel 800 and coaxial with the slide barrel 800. The ejection rib 820 and the slide barrel 800 are connected by the connecting rib 830. The lower edge 821 of the ejection rib 820 is rounded. During the movement of the slide barrel 800 from the first position to the second position, the lower edge 821 abuts against the guide inclined surface 711, causing the stress block 710 to move outward. The ejection rib 820 is a circular ring body and coaxial with the slide barrel 800, ensuring that the evenly distributed elastic arms 700 bend outward synchronously when stressed. The circular ring structure can apply equal radial force to each stress block 710 of the elastic arm 700, avoiding jamming or one-sided excessive deformation caused by uneven stress, ensuring that the elastic arms 700 open synchronously when the plug-in part 300 is pulled out, and the action is reliable. The lower edge 821 of the ejection rib 820 is rounded, which can reduce sliding friction when cooperating with the guide inclined surface 711, allowing the ejection rib 820 to smoothly slide along the inclined surface.

[0048] In some embodiments of the utility model, the outer peripheral wall of plug part 300 is further provided with a smooth fourth flange 320, fourth flange 320 is located above first flange 310, when sliding barrel 800 is located at the first position, fourth flange 320 is opposite to guide inclined surface 711, the inner side of ejection rib 820 has first inner peripheral wall 822 and second inner peripheral wall 823, first inner peripheral wall 822 is located above second inner peripheral wall 823, the diameter of first inner peripheral wall 822 is greater than the diameter of second inner peripheral wall 823, the diameter of fourth flange 320 is greater than the diameter of second inner peripheral wall 823 and less than the diameter of first inner peripheral wall 822, during the movement of sliding barrel 800 from the first position to the second position, second inner peripheral wall 823 can be pushed outward by the fourth flange 320 to make the ejection rib 820 bend outward to prop open the elastic arm 700. During the movement of sliding barrel 800 from the first position to the second position, second inner peripheral wall 823 first contacts fourth flange 320 and is supported outward by fourth flange 320, when the lower edge 821 of ejection rib 820 contacts guide inclined surface 711, due to the outward support of second inner peripheral wall 823 by fourth flange 320, elastic arm 700 is opened outward, when the third abutting plane 713 is completely separated from the fourth abutting plane 311, plug part 300 can be pulled out without obstruction. And the diameter of first inner peripheral wall 822 is greater than the diameter of second inner peripheral wall 823 and the diameter of fourth flange 320, so when loosening, plug part 300 is easier to pull out, realizing that the upper connector 100 and the lower connector 400 are more simple and fast to loosen.

[0049] In some embodiments of the utility model, the outer peripheral wall of socket part 600 is provided with a second flange 620, the elastic member 900 is a spring, the spring is sleeved on the socket part 600, the lower end of the spring abuts against the second flange 620, and the upper end abuts against the third flange 810. The spring is sleeved on the socket part 600, coaxial with the sliding barrel 800 and the socket part 600, ensuring that the elastic force is transmitted linearly along the axial direction, avoiding the skewing or jamming of the sliding barrel 800 caused by eccentric load. The spring is sleeved on the outer periphery of the socket part 600 and arranged in the annular gap between the sliding barrel 800 and the socket part 600, without additional axial or radial space, suitable for the miniaturization and lightweight requirements of the pipe quick connection structure. The spring is made of metal material (such as stainless steel, spring steel), and the metal spring has better resistance to temperature, humidity and corrosive media than the non-metal elastic member 900, and is suitable for complex environments that may be encountered in pipe connection, such as hot water pipes required by shower heads. It can be understood that the upper end of the spring does not necessarily abut against the third flange 810, and another flange can be provided in the sliding barrel 800 for the upper end of the spring to abut against, as long as the spring can provide upward elastic force to the sliding barrel 800.

[0050] In some embodiments of the utility model, the stroke L1 from the first position to the second position is less than the distance L2 from the uppermost end of the force block 710 to the uppermost end of the slide barrel 800 when the slide barrel 800 is at the first position, so that the force block 710 does not protrude out of the slide barrel 800 when the slide barrel 800 is pulled down to the second position, ensuring that the structure of the lower joint 400 is always wrapped by the slide barrel 800 during the entire process of disassembly and installation, and ensuring the integrity of the appearance of the quick connection structure.

[0051] In some embodiments of the utility model, when the slide barrel 800 is at the first position, the lowermost end of the slide barrel 800 is flush with the lowermost end of the second flange 620. The flush design allows the slide barrel 800 to completely wrap the internal parts, optimizes the spatial layout, reduces interference and impurity retention, and ensures the integrity of the appearance.

[0052] In some embodiments of the utility model, the outer peripheral wall of the plug portion 300 is sleeved with a sealing ring 330, and when the plug portion 300 is inserted into the socket portion 600, the sealing ring 330 can block the gap between the plug portion 300 and the socket portion 600. There is a small gap between the mating surfaces of the plug portion 300 and the socket portion 600, and the sealing ring 330 fills the gap by elastic deformation, preventing water from leaking from the connection.

[0053] A water outlet device comprising the pipe quick connection structure described above. The water outlet device can be a faucet, a spray gun, a shower head, or the like. Taking the shower head as an example, the shower head comprises a handle 1000 and a hose 1100, the handle 1000 is connected with the first pipe connection portion 200, and the hose 1100 is connected with the second pipe connection portion 500.

[0054] Although embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements, and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A pipe coupling structure, characterized by comprising: The utility model relates to a water faucet, comprising: an upper connector (100) comprising a plug portion (300) in a tubular shape, an outer peripheral wall of the plug portion (300) being provided with a first flange (310); a lower connector (400) comprising a socket portion (600) and elastic arms (700), an inner side of the socket portion (600) being formed with a water passing cavity (610), the plug portion (300) being capable of being inserted into or separated from the socket portion (600), the elastic arms (700) being at least two and arranged along a circumferential direction of the socket portion (600), an upper end of the elastic arms (700) being provided with a force receiving block (710), an inner side of the force receiving block (710) being formed with a guide inclined surface (711), an outer side of the force receiving block (710) being formed with a first abutting plane (712) facing downward; a sliding barrel (800) being slidably sleeved on the lower connector (400), an inner wall of the sliding barrel (800) being provided with a third flange (810) along a circumferential direction, a top portion of the third flange (810) being provided with a second abutting plane (811), an upper end of an inner side of the sliding barrel (800) being provided with an ejection rib (820); a resilient member (900) being abutted between the sliding barrel (800) and the lower connector (400) to provide an upward elastic force to the sliding barrel (800); the sliding barrel (800) being capable of moving downward from a first position to a second position, the resilient member (900) being compressed during the movement of the sliding barrel (800) downward, when the sliding barrel (800) is located at the first position, the second abutting plane (811) is abutted against the first abutting plane (712), and the first flange (310) is abutted against a bottom portion of the force receiving block (710), when the sliding barrel (800) is located at the second position, the ejection rib (820) opens the force receiving block (710) along the guide inclined surface (711) to make the elastic arms (700) bend outward, so that the plug portion (300) is separated from the socket portion (600).

2. The pipe coupling structure according to claim 1, wherein a bottom portion of the force receiving block (710) is provided with a third abutting plane (713), a top portion of the first flange (310) is provided with a fourth abutting plane (311), when the sliding barrel (800) is located at the first position, the third abutting plane (713) is abutted against the fourth abutting plane (311).

3. The quick coupling structure of a pipe according to claim 1, wherein an outer side of the force receiving block (710) is provided with an outer side surface (714) perpendicular to the first abutting plane (712), the outer side surface (714) being located below the first abutting plane (712), when the sliding barrel (800) is located at the first position, an inner side surface (812) of the third flange (810) is in a gap fit with the outer side surface (714).

4. The quick coupling structure of a pipe according to claim 1, wherein The ejection rib (820) is in a circular ring structure, located at the top of the inside of the slide barrel (800) and coaxial with the slide barrel (800), connected between the ejection rib (820) and the slide barrel (800) through a connecting rib (830), the lower edge (821) of the ejection rib (820) is smooth, and the lower edge (821) abuts against the guide slope (711) to make the force block (710) move outward during the movement of the slide barrel (800) from the first position to the second position.

5. The pipe coupling structure according to claim 4, wherein The outer peripheral wall of the plug portion (300) is further provided with a smooth fourth flange (320), the fourth flange (320) is located above the first flange (310), the fourth flange (320) is opposite to the guide slope (711) when the slide barrel (800) is in the first position, the inside of the ejection rib (820) has a first inner peripheral wall (822) and a second inner peripheral wall (823), the first inner peripheral wall (822) is located above the second inner peripheral wall (823), the diameter of the first inner peripheral wall (822) is greater than that of the second inner peripheral wall (823), the diameter of the fourth flange (320) is greater than that of the second inner peripheral wall (823) and smaller than that of the first inner peripheral wall (822), and the second inner peripheral wall (823) can be pushed outward by the fourth flange (320) to bend the ejection rib (820) outward to support the elastic arm (700) during the movement of the slide barrel (800) from the first position to the second position.

6. The quick coupling structure of a pipe according to claim 1, wherein The outer peripheral wall of the socket portion (600) is provided with a second flange (620), the elastic member (900) is a spring, the spring is sleeved on the socket portion (600), the lower end of the spring abuts against the second flange (620), and the upper end of the spring abuts against the third flange (810).

7. The quick coupling structure of a pipe according to Claim 1, wherein The stroke L1 from the first position to the second position is smaller than the distance L2 from the uppermost end of the force block (710) to the uppermost end of the slide barrel (800) when the slide barrel (800) is in the first position.

8. The quick coupling structure of a pipe according to claim 6, wherein When the slide barrel (800) is in the first position, the lowermost end of the slide barrel (800) is flush with the lowermost end of the second flange (620).

9. The quick coupling structure of a pipe according to Claim 1, wherein The outer peripheral wall of the plug portion (300) is sleeved with a sealing ring (330), and the sealing ring (330) can block the gap between the plug portion (300) and the socket portion (600) when the plug portion (300) is inserted into the socket portion (600).

10. A water outlet device characterized by comprising: The pipe quick connection structure of any one of claims 1-9. The pipe quick connection structure of any one of claims 1-9.

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