A solar buoy

Abstract

The application provides a submersible solar buoy, which comprises a buoy assembly, a solar telescopic mechanism installed on the buoy assembly and a submersible mechanism installed at the bottom of the buoy assembly. The solar telescopic mechanism is arranged to make the solar panel telescopic, so that the solar panel can be unfolded when the buoy is on the sea surface, the contact area of the solar panel with the sun is increased, the converted electric energy of the solar panel is increased, the endurance of the buoy is increased, and the solar panel is retracted when the buoy is submerged, the resistance generated by the solar panel is reduced, and the submersion is more relaxed. The submersible mechanism is arranged to make the buoy submersible in the sea, and after the sensor carried by the buoy detects a ship on the water surface or an underwater robot or other equipment, the buoy can be lifted, a warning signal can be emitted on the sea surface, the warning signal can be weakened by seawater, and the stability of signal transmission is ensured.

Description

Technical Field

[0001] This invention relates to the field of buoy technology, specifically to a rising-and-sinking solar buoy. Background Technology

[0002] Ocean buoys are safety warning devices that all platforms (ships) operating in offshore oil and gas exploration areas need to use. Ocean buoys are generally deployed at a distance of 10 to 40 nautical miles from the operating platform to provide real-time ocean information to the offshore oil and gas operation platform and to send signals to targets (such as ships or equipment) that enter the operating area to warn them to leave.

[0003] Marine surveillance is fundamental to the study, development, and utilization of the ocean. Marine buoys, as an emerging and modern marine monitoring technology, are gaining attention and being utilized. Currently, most commercially available underwater buoys are used to monitor illegal marine equipment within their jurisdictional waters. However, existing underwater buoys, operating in still conditions, are submerged, and water absorbs radio signals, leading to unstable signal transmission. Furthermore, while typical buoys are equipped with batteries, the energy storage capacity of these batteries is fixed. Once the battery is depleted, the buoy becomes unusable, requiring personnel to retrieve it and replace the battery before it can be used again. There is no automatic replenishment of the battery, resulting in a short operating time and limiting its long-term operational capability. Therefore, this invention proposes a submersible solar-powered buoy. Summary of the Invention

[0004] The purpose of this invention is to propose a submersible solar buoy with stable signal transmission and automatic power replenishment, thereby solving the problems of unstable signal transmission, inability to automatically replenish power, short endurance, and inability to work for extended periods in existing buoy devices in the background art.

[0005] To achieve the above objectives, the present invention proposes a rising-and-falling solar buoy, comprising a buoy assembly, a solar telescopic mechanism installed on the buoy assembly to convert solar energy into electrical energy to extend the endurance, and a rising-and-falling mechanism installed at the bottom of the buoy assembly to drive the buoy assembly to rise and fall according to the working conditions; the buoy assembly is equipped with a sensor for sensing targets, a signal transmission device for sending warning signals to the sensed targets, and a battery for providing and storing electrical energy.

[0006] Optionally, the buoy assembly includes a buoy platform, a buoy pole mounted on top of the buoy platform, a buoy top plate mounted on top of the buoy pole, a push rod sealing chamber mounted on top of the buoy platform, and a push rod mounted on the push rod sealing chamber; the solar telescopic mechanism is installed between the buoy platform and the buoy top plate; the ascent and descent mechanism is installed at the bottom of the buoy platform; the battery and the push rod sealing chamber are arranged together at the top edge of the buoy platform and fixed between the two push rod sealing chambers.

[0007] Optionally, the solar telescopic mechanism includes a guide shaft installed between the floating platform and the buoy top plate, with its top and bottom respectively connected to the buoy top plate and the floating platform; a lifting sleeve slidably installed on the guide shaft; an upper connecting rod seat and a lower connecting rod seat installed on the guide shaft; a long connecting rod hinged to the lower connecting rod seat; a short connecting rod hinged to the upper connecting rod seat; a connecting block installed on the short connecting rod; a telescopic mounting plate installed on the connecting block and connected to the top of the push rod; and a solar panel installed on the telescopic mounting plate.

[0008] Optionally, the lower connecting rod seat is fixedly connected to the top of the lifting sleeve; the upper and lower connecting rod seats have four slots evenly distributed in the circumferential direction, and concentric through holes are provided on both sides of the slots, in which a rotating shaft connected to a long connecting rod or a short connecting rod is installed; a connecting rod shaft is movably connected between the long connecting rod and the short connecting rod.

[0009] Optionally, the levitation mechanism includes a motor base installed at the bottom of the buoy, a motor installed in the motor base, a cable seat installed at the bottom of the buoy and connected to the motor, a cable installed on the cable seat, and a grappling hook connected to one end of the cable for anchoring and fixing the buoy assembly and the solar telescopic mechanism in the water.

[0010] Optionally, the cable holder is provided with a control shaft connected to the motor output shaft; the other end of the cable is fixedly connected to the cable holder.

[0011] Optionally, the bottom of the floating platform is provided with two lifting and diving mechanisms, and the installation positions of the two lifting and diving mechanisms are 180° apart.

[0012] Optionally, the grappling hook includes a grappling hook core, a grappling hook cover fixedly installed on the top of the grappling hook core and connected to the cable, a grappling hook claw support frame fixedly installed on the grappling hook core, a ring installed on the grappling hook claw support frame, and a grappling hook claw movably installed on the ring and capable of rotating around the ring.

[0013] Optionally, the gripper support frame is provided with an inner circular groove; the ring is installed in the inner circular groove.

[0014] Compared with the prior art, the present invention provides a submersible solar buoy with the following advantages:

[0015] This type of submersible solar buoy, through the setting of a solar telescopic mechanism, can convert solar energy into electrical energy and store the electrical energy in a battery, thereby automatically replenishing the energy in the battery and extending the buoy's endurance. It also allows the solar panel to extend and retract, so that when the buoy is on the sea surface, the solar panel can be deployed to increase the contact area between the solar panel and the sun, increase the electrical energy converted by the solar panel, and further improve the charging efficiency of the battery. In addition, when the buoy submerges, the solar panel can be retracted to reduce the resistance generated by the solar panel and make the submersion easier.

[0016] This type of submersible solar buoy, through the setting of a submersible mechanism, allows the buoy to rise and submerge in the sea. After detecting surface vessels or underwater robots through its onboard sensors, it can rise to the surface and transmit warning signals, avoiding the weakening of warning signals by seawater, thereby ensuring the stability of signal transmission. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the self-submersible solar buoy used for monitoring according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the solar telescopic mechanism of the present invention;

[0019] Figure 3 This is a schematic diagram of the submersion mechanism of the present invention when it is not subject to buoyancy;

[0020] Figure 4 This is a schematic diagram of the grab hook structure when it is not subjected to buoyancy.

[0021] Figure 5 This is a diagram showing the usage status of the present invention under silent operating conditions;

[0022] Figure 6 This is a diagram showing the usage status of the present invention under working conditions.

[0023] The diagram identifies the following: 1. Buoy assembly; 11. Floating platform; 12. Buoy mast; 13. Buoy top plate; 14. Push rod sealed chamber; 15. Push rod; 16. Sensor; 17. Signal transmission equipment; 18. Battery; 2. Solar telescopic mechanism; 21. Guide spindle; 22. Lifting sleeve; 23. Upper connecting rod seat; 231. Groove; 232. Through hole; 233. Rotating shaft; 24. Lower connecting rod seat; 25. Length 251. Connecting rod; 26. Short connecting rod; 27. Connecting block; 28. Tension-reduction mounting plate; 29. ​​Solar panel; 3. Elevation / submersion mechanism; 31. Motor mount; 32. Motor; 33. Cable mount; 331. Control shaft; 34. Cable; 35. Grappling hook; 351. Grappling hook cover; 352. Grappling hook core; 353. Grappling hook claw support frame; 354. Ring; 355. Grappling hook claw; 356. Inner groove. Detailed Implementation

[0024] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, illustrates the invention. Numerous specific details are set forth in the description below to provide a thorough understanding of the invention. However, the invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below. The accompanying drawings of this invention... Figure 3 and attached Figure 4 The attached diagram shows the state without buoyancy. Figure 3 To better illustrate this, the cable is offset at a certain angle.

[0025] The present invention provides a submersible solar buoy that can be used in marine monitoring and other similar applications. The following is a detailed description of a submersible solar buoy.

[0026] See appendix Figure 1 — Figure 6The diagram shows a preferred embodiment of the elevating solar buoy of the present invention. This elevating solar buoy includes a buoy assembly 1, a solar telescopic mechanism 2 mounted on the buoy assembly 1, and an elevating mechanism 3 mounted on the bottom of the buoy assembly 1. The buoy assembly 1 is equipped with a sensor 16 for sensing targets (e.g., vessels and equipment entering the operating range), a signal transmission device 17 for emitting warning signals to the sensed targets, and a battery 18 for providing and storing electrical energy. The present invention provides the installation conditions for the solar telescopic mechanism 2 and the elevating mechanism 3 through the arrangement of the buoy assembly 1. The solar telescopic mechanism 2 converts solar energy into electrical energy and stores it in the battery 18, allowing the battery 18 to be automatically replenished during use, thereby extending the buoy's endurance and working time. Furthermore, the solar panels can be deployed when the buoy is charging. The solar panels increase the contact area with sunlight, accelerating the charging speed of the battery 18. When the buoy dives, the solar panels can be retracted to reduce the resistance generated by the solar panels during descent, thus facilitating the buoy's dive. The buoy can rise and fall through the rising and falling mechanism 3, allowing it to rise to the surface to send warning signals or replenish power when needed, avoiding signal attenuation by seawater, ensuring stable warning signal transmission, extending endurance, and preventing collisions with passing ships or other equipment, thus protecting the buoy. The battery 18 stores electrical energy converted from the solar panels 28, extending the endurance of the solar buoy. The battery 18 is cylindrical and its height is flush with the push rod sealing chamber 14.

[0027] See appendix Figure 1 — Figure 6 As shown, in this invention, the buoy assembly 1 includes a buoy platform 11, a buoy pole 12 installed on the top of the buoy platform 11, a buoy top plate 13 installed on the top of the buoy pole 12, a push rod sealing chamber 14 installed on the top of the buoy platform 11, and a push rod 15 installed on the push rod sealing chamber 14; the solar telescopic mechanism 2 is installed between the buoy platform 11 and the buoy top plate 13; the ascent and descent mechanism 3 is installed at the bottom of the buoy platform 11; the invention, through the setting of the push rod 15, in conjunction with the push rod sealing chamber 14, allows the push rod 15 to extend and retract according to the push rod sealing chamber 14, providing extension and retraction power for the solar telescopic mechanism 2, and ensuring the smooth extension and retraction of the solar telescopic mechanism 2.

[0028] See appendix Figure 1 — Figure 2As shown, in this invention, the solar telescopic mechanism 2 includes a guide shaft 21 installed between the floating platform 11 and the buoy top plate 13, with its top and bottom respectively connected to the buoy top plate 13 and the floating platform 11; a lifting sleeve 22 slidably installed on the guide shaft 21; an upper connecting rod seat 23 and a lower connecting rod seat 24 installed on the guide shaft 21; a long connecting rod 25 hinged to the lower connecting rod seat 24; a short connecting rod 26 hinged to the upper connecting rod seat 23; a connecting block 27 installed on the short connecting rod 26; a telescopic mounting plate 28 installed on the connecting block 27; and a solar panel 29 installed on the telescopic mounting plate 28; wherein, the lower connecting rod seat 24 and the... The top of the lifting sleeve 22 is fixedly connected; four slots 231 are evenly distributed circumferentially on the upper connecting rod seat 23 and the lower connecting rod seat 24, and concentric through holes 232 are provided on both sides of the slots 231. A rotating shaft 233 connected to the long connecting rod 25 or the short connecting rod 26 is installed in the through hole 232. A connecting rod rotating shaft 251 is movably connected between the long connecting rod 25 and the short connecting rod 26. The present invention guides and limits the movement of the lifting sleeve 22, the upper connecting rod seat 23 and the lower connecting rod seat 24 by setting the guide main shaft 21, so that they can only move up and down along the guide main shaft 21; by setting the upper connecting rod seat 23 and the lower connecting rod seat 24, the lifting sleeve 22 carries The lower connecting rod seat 24 moves up and down, changing the distance between the upper connecting rod seat 23 and the lower connecting rod seat 24. This causes the long connecting rod 25 and the short connecting rod 26 to rotate, expanding or contracting the telescopic mounting plate 28 on the short connecting rod 26. Specifically, the solar panel 29 on the telescopic mounting plate 28 can expand during charging, increasing the contact area with sunlight and improving the charging efficiency of the battery 18. Furthermore, the solar panel 29 converts solar energy into electrical energy, which is stored in the battery 18. During descent, the solar panel 29 contracts, reducing drag and extending the buoy's range. While enhancing navigation capabilities, this design also makes the buoy's descent easier and reduces the energy required for diving. The slot 231 allows for clearance between the long connecting rod 24 and the short connecting rod 25, ensuring they can be movably connected to the connecting rod seat 23. The through hole 232, located concentrically on both sides of the slot 231, provides installation conditions for the rotating shaft 233. The rotating shaft 233, positioned to the side, provides a basis for the movable connection of the long connecting rod 24 and the short connecting rod 25, allowing them to rotate around the connected rotating shaft 233 when movably connected to the connecting rod seat 23.

[0029] See appendix Figure 1 — Figure 3As shown, in this invention, the levitation mechanism 3 includes a motor base 31 installed at the bottom of the float 11, a motor 32 installed in the motor base 31, a cable seat 33 installed at the bottom of the float 11 and connected to the motor 32, a cable 34 installed on the cable seat 33, and a grappling hook 35 connected to one end of the cable 34 for anchoring and fixing the buoy assembly 1 and the solar telescopic mechanism 2 in the water; wherein, the cable seat 33 is provided with a control shaft 331 connected to the output shaft of the motor 32, and the other end of the cable 34 is fixedly connected to the cable seat 33. Two levitation mechanisms 3 are provided at the bottom of the float 11, and the installation positions of the two levitation mechanisms 3 are 180° apart from the center of the float 11; this invention provides a rotational power source for the control shaft 331 to rotate through the motor 32, so that the control shaft 331 can rotate, thereby controlling the release and retraction of the cable 34. Hook 35 serves as the anchor, anchored to the seabed. Since the buoyancy of the buoy is greater than its weight, when the cable 34 is released, the buoyancy exceeds its weight, causing the buoy to rise. When the cable 34 is wound up, it pulls the buoy downwards, thus causing the buoy to rise and fall. The cable seat 33 provides conditions for the cable 34 to wind up. The grappling hook 35 secures the buoy to the seabed, preventing it from moving arbitrarily due to buoyancy, currents, or other disturbances, thus preventing it from becoming unrecoverable. This fixes the buoy's position, limiting its movement to a specific range, facilitating retrieval and maintenance. The installation of two ascent and descent mechanisms 3 on the platform 11, positioned 180° apart, ensures more even force distribution on the buoy, making it more stable in the seawater.

[0030] See appendix Figure 3 — Figure 4 As shown, in this invention, the grappling hook 35 includes a grappling hook core 352, a grappling hook cover 351 fixedly installed on the top of the grappling hook core 352 and connected to the cable 34, a grappling hook cover 351 fixedly installed on the top of the grappling hook core 352 and connected to the cable 34, a grappling hook claw support frame 353 fixedly installed on the grappling hook core 352, a ring 354 installed on the grappling hook claw support frame 353, and a grappling hook claw 355 movably installed on the ring 354 and capable of rotating around the ring 354; wherein, the grappling hook claw support frame 353 is provided with an inner... A circular groove 356 and a circular ring 354 are installed in the inner circular groove 356. The present invention provides an installation position for the grab claw support frame 353 by setting the grab hook core 352, so that the grab claw 355 can be installed. By setting the circular ring 354, the grab claw 355 can rotate around the circular ring 354 at a certain angle. Therefore, when the buoy is subjected to seawater buoyancy and ocean current disturbance, the grab claw 355 can extend outward and contact the seabed. The grab hook is in the seabed mud and sand, preventing the grab claw 355 from loosening, thereby improving the stability of the buoy assembly.

[0031] See appendix Figure 1 — Figure 6 As shown, the method of using the present invention includes:

[0032] Step 1: Install push rod 15 inside push rod sealing chamber and seal it. Also, arrange push rod sealing chamber 14 around the circumference on floating platform 11, in two places, with the two locations 180° apart from the center of floating platform 11.

[0033] Step 2: Install the guide spindle 21 at the center of the floating platform 11, then install the lifting sleeve 22 and the guide spindle 21 concentrically. At the same time, fix the bottom end face of the lifting sleeve 22 to the push rod 15. Then fix the solar panel on the telescopic mounting plate 28 and fix the telescopic mounting plate 28 to the short connecting rod 26 through the connecting block 27.

[0034] Step 3: Install the long connecting rod 25 evenly on the lower connecting rod seat 24 in a circumferential manner through the rotating shaft 233, and install the short connecting rod 26 evenly on the upper connecting rod seat 23 in a circumferential manner through the rotating shaft 233. Then connect the long connecting rod 25 and the short connecting rod 26 in a movable manner through the connecting rod rotating shaft 251.

[0035] The fourth step is to mount the lower connecting rod seat 24, which is hinged to the long connecting rod 25 through the rotating shaft 233, onto the guide main shaft 21, and fix the lower connecting rod seat 24 to the top of the lifting slide sleeve 22. The upper connecting rod seat 23, which is hinged to the short connecting rod 26 through the rotating shaft 233, is fixedly installed on the guide main shaft 21, so that the lower connecting rod seat 24 connected to the long connecting rod 25 can move axially along the guide main shaft 21.

[0036] Step 5: Motor base 31 and cable base 33 are arranged circumferentially at the bottom of the floating platform 11, with a 180° difference between them. Motor 32 is fixedly installed on motor base 31, and motor base 31 is used to seal motor 32. Control shaft 331 is connected to the output shaft of motor 32 through a coupling. Then, control shaft 331 is installed on cable base 33. Cable 34 is wound around control shaft 331, and one end of cable 34 is fixedly connected to cable base 33.

[0037] Step 6: Fix the claw hook cover 351 to the claw hook core 352, fix the claw hook support frame 353 on the claw hook core 352, fix the ring 354 in the inner groove of the claw hook support frame 353, and arrange the claw hook 355 around the ring 354 in a circumferential manner so that the claw hook 355 can rotate relative to the ring 354.

[0038] Step 7: After installing the grab hook 35, fix the other end of the cable 34 to the grab hook cover 351.

[0039] Step 8: Place the submersible solar buoy at an appropriate depth in the target waters and fix the grappling hook 35 in the seabed sediment. At this time, the device is in a silent working state. The solar panel 29 is in a retracted state through the solar telescopic mechanism 2. The grappling hook 35 expands outward around the ring 354 due to the buoyancy generated by the buoy assembly 1.

[0040] Step 9: When the self-submersible solar buoy senses an intrusion of a vessel or equipment into the operating area through its onboard sensors, or when the battery power is insufficient, the self-submersible solar buoy operates through motor 32. The output shaft of motor 32 drives control shaft 331 to rotate, and control shaft 331 releases the cable 34 wrapped around it, causing the self-submersible solar buoy to rise due to buoyancy until it reaches the sea surface, emitting a warning signal or rising through push rod 15, pushing the lifting sleeve 22 connected to it to rise. The lifting sleeve 22 drives the lower connecting rod seat 24 connected to it to rise, and the upper connecting rod seat 23 is fixed on the guide main shaft 21, thereby causing the short connecting rod 26 to rotate outward, driving the telescopic mounting plate 28 to unfold, causing the solar panel 29 to unfold, converting solar energy into electrical energy, and storing the electrical energy in the battery 18.

[0041] Step 10: After completing the warning signal transmission or charging, push rod 15 moves downward, causing lifting slide 22 to move downward, causing short connecting rod 26 to rotate inward, causing tension mounting plate 27 to retract, causing solar panel 28 to retract, and at the same time driving motor 32 to reverse, driving control shaft 331 to reverse, winding cable 34 around control shaft 331, pulling the self-submerging solar buoy into the sea, placing it in the underwater silent position, and entering silent operation mode.

[0042] The torque of motor 28 in step five above needs to be selected based on the forces acting on the device in the water, ensuring that the pulling force it generates on the buoy can overcome the buoyancy of the self-submersible solar buoy, and that the maximum pulling force generated by motor 28 on the device is... In the formula, T is the motor torque, and L is the radius of the rotating shaft in the cable seat. In the formula, F is the buoyancy force on the device and m is the mass of the device. The motor model can be obtained through the above calculation.

[0043] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A type of submersible solar buoy, characterized in that, The system includes a buoy assembly (1), a solar telescopic mechanism (2) installed on the buoy assembly (1) to convert solar energy into electrical energy to extend the endurance, and a diving mechanism (3) installed at the bottom of the buoy assembly (1) to drive the buoy assembly (1) to dive and rise according to the working conditions; the buoy assembly (1) is equipped with a sensor (16) for sensing targets, a signal transmission device (17) for sending warning signals to the sensed targets, and a battery (18) for providing and storing electrical energy. The submersion mechanism (3) includes a motor base (31) installed at the bottom of the float (11), a motor (32) installed in the motor base (31), a cable base (33) installed at the bottom of the float (11) and connected to the motor (32), a cable (34) installed on the cable base (33), and a grappling hook (35) connected to one end of the cable (34) for anchoring and fixing the buoy assembly (1) and the solar telescopic mechanism (2) in the water. The grappling hook (35) includes a grappling hook core (352), a grappling hook cover (351) fixedly installed on the top of the grappling hook core (352) and connected to the cable (34), a grappling hook claw support frame (353) fixedly installed on the grappling hook core (352), a ring (354) installed on the grappling hook claw support frame (353), and a grappling hook claw (355) movably installed on the ring (354) and capable of rotating around the ring (354).

2. The submersible solar buoy according to claim 1, characterized in that, The buoy assembly (1) includes a buoy platform (11), a buoy pole (12) installed on the top of the buoy platform (11), a buoy top plate (13) installed on the top of the buoy pole (12), a push rod sealing chamber (14) installed on the top of the buoy platform (11), and a push rod (15) installed on the push rod sealing chamber (14); the solar telescopic mechanism (2) is installed between the buoy platform (11) and the buoy top plate (13); the ascent and descent mechanism (3) is installed at the bottom of the buoy platform (11); the battery (18) and the push rod sealing chamber (14) are arranged together at the top edge of the buoy platform (11) and fixed between the two push rod sealing chambers (14).

3. The submersible solar buoy according to claim 2, characterized in that, The solar telescopic mechanism (2) includes a guide shaft (21) installed between the floating platform (11) and the buoy top plate (13), with its top and bottom connected to the buoy top plate (13) and the floating platform (11) respectively; a lifting sleeve (22) slidably installed on the guide shaft (21); an upper connecting rod seat (23) and a lower connecting rod seat (24) installed on the guide shaft (21); a long connecting rod (25) hinged on the lower connecting rod seat (24); a short connecting rod (26) hinged on the upper connecting rod seat (23); a connecting block (27) installed on the short connecting rod (26); a telescopic mounting plate (28) installed on the connecting block (27) and connected to the top of the push rod (15); and a solar panel (29) installed on the telescopic mounting plate (28).

4. The submersible solar buoy according to claim 3, characterized in that, The lower connecting rod seat (24) is fixedly connected to the top of the lifting slide sleeve (22); the upper connecting rod seat (23) and the lower connecting rod seat (24) are evenly distributed with four slots (231) in the circumferential direction, and concentric through holes (232) are provided on both sides of the slots. A rotating shaft (233) connected to the long connecting rod (25) or the short connecting rod (26) is installed in the through hole (232); a connecting rod shaft (251) is movably connected between the long connecting rod (25) and the short connecting rod (26).

5. The submersible solar buoy according to claim 1, characterized in that, The cable seat (33) is provided with a control shaft (331) connected to the output shaft of the motor (32); the other end of the cable (34) is fixedly connected to the cable seat (33).

6. The submersible solar buoy according to claim 1, characterized in that, The bottom of the floating platform (11) is provided with two lifting and diving mechanisms (3), and the installation positions of the two lifting and diving mechanisms (3) are 180° apart.

7. The submersible solar buoy according to claim 1, characterized in that, The gripper support frame (353) is provided with an inner circular groove (356); the ring (354) is installed at the inner circular groove (356).

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