A rotary intelligent parcel sorting and security inspection integrated device

Abstract

This utility model discloses a rotary intelligent parcel sorting and security inspection integrated device, comprising: a ring-shaped rotating platform with a drive mechanism at its edge for driving the ring-shaped rotating platform to rotate around its own central axis; multiple parcel carrying units, each parcel carrying unit having a recessed shelf on its top and connected to a support box on the ring-shaped rotating platform; a support frame, coaxially sleeved on the outside of the ring-shaped rotating platform; a multi-module security inspection module group, which is set on the inner peripheral wall of the support frame, with its detection end facing the radial center of the ring-shaped rotating platform; an AI processing module, which is located on the top of the support frame, and the input end of the AI ​​processing module is electrically connected to the multi-module security inspection module group; and a sorting execution mechanism. This utility model has the following advantages: realizing all-round, blind-spot-free security inspection of parcels; improving sorting accuracy and efficiency; constructing an intelligent decision-making closed loop; optimizing spatial layout and operational stability; and enhancing environmental adaptability.

Description

Technical Field

[0001] This utility model relates to the field of express logistics technology, and in particular to a rotary intelligent parcel sorting and security inspection integrated device. Background Technology

[0002] Currently, security checks on express parcels are a separate process that requires manual placement of parcels on a security scanner. After the parcels pass through the scanner, they are collected manually. This security check process is completed by each express company itself, which consumes a lot of manpower and increases the company's operating costs.

[0003] Existing parcel sorting systems typically employ a linear assembly line design, separating security inspection and sorting equipment. This design suffers from the following drawbacks: 1. Low space utilization: Linear layouts require long-distance transport, resulting in a large footprint; 2. Security blind spots: Single-view scanning can easily miss contraband in irregularly shaped parcels; 3. Sorting efficiency bottleneck: Traditional swing-arm sorting is slow and cannot handle peak traffic; 4. Insufficient intelligence: Security inspection and sorting systems operate independently, leading to delayed decision-making. While some solutions have attempted a circular layout, these lack integration of multimodal security inspection and real-time AI decision-making, and their mechanical structure stability is poor, failing to meet the demands of high-throughput scenarios. Utility Model Content

[0004] This utility model discloses a rotary intelligent parcel sorting and security inspection integrated device. It studies and improves the existing structure and its shortcomings, and provides a rotary intelligent parcel sorting and security inspection integrated device to achieve better practical value.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A rotary intelligent parcel sorting and security inspection integrated device includes:

[0007] A ring-shaped rotating platform, the edge of which is provided with a drive mechanism for driving the ring-shaped rotating platform to rotate about its own central axis;

[0008] Multiple package carrying units, each of which has a recessed shelf on top and is connected to the supporting box on the annular rotating platform;

[0009] A support frame is coaxially sleeved on the outside of the annular rotating platform;

[0010] A multi-module security inspection module group is disposed on the inner peripheral wall of the support frame, and its detection end faces the radial center of the annular rotating platform.

[0011] An AI processing module is located at the top of the support frame, and the input end of the AI ​​processing module is electrically connected to the multi-module security inspection module group.

[0012] The sorting execution mechanism is located on the downstream side of the annular rotating platform, and the sorting execution mechanism includes a plurality of pneumatic push rods arranged along the tangential direction of the annular rotating platform;

[0013] The sorting chute assembly includes at least three inclined chutes, and each chute is aligned with a pneumatic push rod.

[0014] In some embodiments, the multi-module security inspection module group includes an X-ray dual-view scanning chamber, a millimeter-wave scanning imaging plate, and a metal detection structure. The X-ray dual-view scanning chamber is disposed on the inner wall of the supporting frame, the millimeter-wave scanning imaging plate is disposed adjacent to the X-ray dual-view scanning chamber, and the metal detection structure is disposed downstream of the millimeter-wave scanning imaging plate.

[0015] In some embodiments, the drive mechanism includes an internal gear ring and a gear set. The internal gear ring is coaxially and fixedly connected to the annular rotating platform. The sun gear of the gear set is connected to the output shaft of the drive motor, and the planet gears of the gear set mesh with the internal gear ring.

[0016] In some embodiments, the AI ​​processing module includes an edge computing node, a multi-sensor fusion processor, and a real-time sorting decision module. The edge computing node is mounted on the top of the support frame, the multi-sensor fusion processor is connected to the edge computing node, the input of the real-time sorting decision module is connected to the multi-sensor fusion processor, and the output of the real-time sorting decision module is connected to the control terminal of the sorting execution mechanism.

[0017] In some embodiments, the sorting actuator further includes: a height adjustment guide rail vertically fixed to the ground, and the pneumatic push rod is slidably connected to the height adjustment guide rail via a slider.

[0018] In some embodiments, the device further includes a piezoelectric sensor embedded in the bottom of the recessed shelf and a weight signal converter disposed in the cavity of the support box, wherein the piezoelectric sensor is electrically connected to the weight signal converter.

[0019] In some embodiments, the top of the support frame is provided with LED light tubes facing the plurality of packaged carrier units and infrared supplementary lights spaced between the LED light tubes.

[0020] In some embodiments, the sorting chute group includes: a high-risk goods chute positioned opposite the first sorting station of the pneumatic pusher, a suspicious goods chute positioned opposite the second sorting station of the pneumatic pusher, and a safe goods chute positioned opposite the third sorting station of the pneumatic pusher.

[0021] In some embodiments, the metal detection structure includes a support frame spanning above the annular rotating platform and a through-beam induction coil embedded in the support frame column.

[0022] The rotary intelligent parcel sorting and security inspection integrated device provided by this utility model has the following advantages:

[0023] 1. The continuous rotation of the circular rotating platform ensures that the package is fully exposed to the integrated multi-module security inspection module group on the supporting frame during transportation. Through dual-view cross-scanning of the package's internal structure using an X-ray dual-view scanning chamber, combined with the deep detection of non-metallic materials by a millimeter-wave scanning imaging plate, and the precise positioning of metallic foreign objects by a metal detection structure, the three work together to completely eliminate the blind spots of single detection methods, significantly improving the ability to detect contraband.

[0024] 2. The sorting mechanism employs pneumatic pushers arranged tangentially, whose direction of motion is optimally matched with the movement trajectory of the package on the circular rotating platform, ensuring precise and controllable pushing force. Combined with the height adjustment guide rail's function to adjust the vertical position of the pneumatic pushers, it can adapt to the center of gravity height of packages of different sizes, making the sorting operation both fast and stable.

[0025] 3. The AI ​​processing module processes multi-source sensor data in real time through edge computing nodes. The multi-sensor fusion processor comprehensively analyzes the physical characteristics of the package (such as weight information detected by piezoelectric sensors) and security inspection results (such as X-ray, millimeter wave, and metal detection data). Finally, the real-time sorting decision module generates operation instructions and drives the corresponding pneumatic push rod to perform sorting, forming an integrated intelligent control of "perception-analysis-execution".

[0026] 4. The compact circular structure of the ring-shaped rotary platform significantly saves floor space compared to the traditional linear layout. Its drive mechanism adopts a meshing transmission method of internal gear ring and gear set, and the multi-planetary gear load-sharing design effectively suppresses off-center load vibration, ensuring the platform's stable operation under high loads.

[0027] 5. The LED tubes and infrared supplement lights installed on the top of the support frame constitute a composite lighting system. When the ambient light is insufficient, the infrared supplement light is automatically activated to ensure that optical sensitive components such as the millimeter-wave scanning imaging board always obtain the lighting conditions required for clear imaging, thereby enhancing environmental adaptability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a rotary intelligent parcel sorting and security inspection integrated device proposed in this utility model;

[0029] Figure 2This is a schematic diagram of the bottom surface of the annular rotating platform of the integrated intelligent parcel sorting and security inspection device proposed in this utility model.

[0030] Figure 3 for Figure 1 A magnified view of a portion at point A shown;

[0031] Figure 4 for Figure 1 A magnified view of a portion at point B shown;

[0032] Figure 5 This is a schematic diagram of the bottom of the recessed shelf of a rotary intelligent parcel sorting and security inspection integrated device proposed in this utility model.

[0033] Figure 6 This is a schematic diagram of the support box of a rotary intelligent parcel sorting and security inspection integrated device proposed in this utility model.

[0034] In the attached diagram: 1-Annular rotating platform; 11-Internal gear ring; 12-Drive motor; 13-Gear set; 21-Support box; 3-Support frame; 41-X-ray dual-view scanning chamber; 42-Millimeter-wave scanning imaging plate; 431-Support frame; 432-Through-beam induction coil; 5-AI processing module; 61-Pneumatic push rod; 62-Height adjustment guide rail; 63-Slider; 71-High-risk goods chute; 72-Suspicious goods chute; 73-Safe goods chute; 81-Piezoelectric sensor; 82-Weight signal converter; 91-LED light tube; 92-Infrared supplementary light. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0036] Reference Figures 1 to 6 In a preferred embodiment, a rotary package intelligent sorting and security inspection integrated device includes: a ring-shaped rotating platform 1, the edge of which is provided with a drive mechanism for driving the ring-shaped rotating platform 1 to rotate around its own central axis.

[0037] Multiple parcel carrying units, each with a recessed storage board on top and connected to the support box body 21 on the annular rotating platform 1;

[0038] Support frame 3, coaxially sleeved outside the annular rotating platform 1;

[0039] Multi-module security inspection module group, arranged on the inner peripheral wall of the support frame 3, and its detection end facing the radial center of the annular rotating platform 1;

[0040] AI processing module 5, arranged on top of the support frame 3, and the input end of the AI processing module 5 is electrically connected to the multi-module security inspection module group;

[0041] Sorting execution mechanism, arranged on the downstream side of the annular rotating platform 1, the sorting execution mechanism includes a plurality of pneumatic push rods 61 arranged along the tangent direction of the annular rotating platform 1;

[0042] Sorting chute group, which includes at least three inclined chutes, and the chutes are arranged in one-to-one alignment with the pneumatic push rods 61.

[0043] As Figure 2 shown, in some embodiments, the driving mechanism includes an internal gear ring 11 and a gear set 13. The internal gear ring 11 is coaxially and fixedly connected to the annular rotating platform 1. The sun gear of the gear set 13 is connected to the output shaft of the driving motor 12. The planet gears of the gear set 13 are meshed with the internal gear ring 11 for transmission. By sharing the torque evenly through multiple planet gears, the platform torsional vibration caused by single-point driving is avoided. Combining with the radial constraint of the auxiliary guide rail, it is ensured that the parcel passes through the security inspection area without shaking in the recessed storage board, and the scanning image is ensured to be free of motion blur.

[0044] As Figure 1 shown, in some embodiments, LED light tubes 91 facing the multiple parcel carrying units and infrared supplementary lights 92 spaced between the LED light tubes 91 are arranged on top of the support frame 3. Specifically, the support frame 3 includes a horizontal closed ring and a three-dimensional support structure. The cross-section of the horizontal closed ring is a "day" - shaped reinforced structure. The three-dimensional support structure includes a top annular cross beam, vertical columns, and a bottom foundation ring beam. The bottom foundation ring beam is anchored to the concrete foundation. The vertical columns are equally spaced circumferentially and are used to fix the multi-module security inspection simulation group. The top annular cross beam is used to install the LED light tubes 91 and the infrared supplementary lights 92. The top cross beam integrates the LED light tubes 91 and the infrared supplementary lights 92, and irradiates the parcel carrying units downward at an angle of 45°, solving the problem of rotational shadows.

[0045] Refer to together Figure 3In some embodiments, the multi-module security inspection module group includes an X-ray dual-view scanning chamber 41, a millimeter-wave scanning imaging plate 42, and a metal detection structure. The X-ray dual-view scanning chamber 41 is disposed on the inner wall of the supporting frame 3, the millimeter-wave scanning imaging plate 42 is adjacent to the X-ray dual-view scanning chamber 41, and the metal detection structure is disposed downstream of the millimeter-wave scanning imaging plate 42. In some embodiments, the metal detection structure includes a support frame 431 spanning above the annular rotating platform 1, and a through-beam induction coil 432 embedded in the column of the support frame 431. The detection is always located in the cross-scanning area of ​​the dual X-ray sources of the X-ray dual-view scanning chamber 41; the main beam coverage area of ​​the millimeter-wave scanning imaging plate 42; and the effective sensing range of the through-beam induction coil 432 of the metal detection structure, eliminating detection blind spots. Specifically, the X-ray dual-view scanning chamber 41 is a rectangular metal shielded chamber with lead plates embedded in the chamber walls to prevent radiation leakage, and orthogonally arranged X-ray sources and detector arrays on the left and right sides. The vertical columns of the ring-shaped support frame 3 provide a rigid mounting surface, ensuring that the X-ray dual-view scanning chamber 41, the millimeter-wave scanning imaging plate 42, and the detection end of the metal detection structure are precisely oriented toward the radial center of the rotating platform 1, eliminating detection angle deviation.

[0046] Specifically, the annular rotating platform 1 has a horizontal annular closed structure. The difference between its outer and inner diameters is equal to the width of the installation area for multiple package-carrying units. Mounting holes are equidistantly spaced along the circumference of the outer edge of the annular rotating platform 1, and the support housing 21 is fixed in place by bolts, forming a radial distribution. The annular rotating platform 1 is connected to the base via a support frame of the bottom gear set 13. The center hole of the support frame is fitted and fixed to the vertical spindle, and the lower end of the vertical spindle is mounted to a concrete foundation via a flange. The base is equipped with leveling bolts to calibrate the platform's levelness using a laser level. An auxiliary guide rail (not shown) is installed below the outer edge of the annular rotating platform 1. Nylon rollers are embedded in the guide rail, contacting the lower surface of the annular rotating platform 1 to form rolling support and suppress vibration offset during high-speed rotation. The annular closed structure allows the package-carrying units to be continuously distributed along the circumference. During rotation, the packages sequentially pass through a multi-module security inspection module group (X-ray dual-view scanning chamber 41 / millimeter-wave scanning imaging plate 42 / metal detection structure) at fixed positions, achieving a highly efficient "fixed equipment, dynamic package inspection" mode and eliminating the backtracking waste of traditional linear layouts.

[0047] In some embodiments, the AI ​​processing module 5 includes an edge computing node, a multi-sensor fusion processor, and a real-time sorting decision module. The edge computing node is mounted on the top of the support frame 3, the multi-sensor fusion processor is connected to the edge computing node, the input end of the real-time sorting decision module is connected to the multi-sensor fusion processor, and the output end of the real-time sorting decision module is connected to the control end of the sorting execution mechanism.

[0048] like Figure 4As shown, in some embodiments, the sorting actuator further includes: a height adjustment guide rail 62 vertically fixed to the ground, and a pneumatic push rod 61 slidably connected to the height adjustment guide rail 62 via a slider 63.

[0049] like Figure 5 and Figure 6 As shown, in some embodiments, a piezoelectric sensor 81 embedded in the bottom of the recessed shelf is also included for real-time acquisition of changes in package weight, and a weight signal converter 82 located within the cavity of the support box 21. The piezoelectric sensor 81 and the weight signal converter 82 are electrically connected. Specifically, the groove of the recessed shelf has a U-shaped cross-section, effectively constraining the package from displacement during rotation, and the groove wall is inclined at 10° to prevent the package from slipping out. The support box 21 is a hollow rectangular steel tube, and the length direction of the support box 21 is perpendicular to the tangent of the annular rotating platform 1, so that the center point of the recessed shelf is located on the radial center line of the annular rotating platform 1, ensuring that the package is at the detection focus when passing through the security inspection module. By setting the support box 21, it is ensured that the recessed shelf does not vibrate during high-speed rotation.

[0050] In some embodiments, the sorting chute group includes: a high-risk goods chute 71 positioned opposite the first sorting station of the pneumatic push rod 61, a suspicious goods chute 72 positioned opposite the second sorting station of the pneumatic push rod 61, and a safe goods chute 73 positioned opposite the third sorting station of the pneumatic push rod 61.

[0051] The parcels flow as follows: the circular rotating platform 1 is driven by gear set 13 to rotate at a constant speed, causing multiple parcel-carrying units evenly distributed around the circumference to rotate synchronously. The parcels move in a circular motion with the platform within the recessed shelf. The parcels pass through the security inspection area in sequence. The multi-module security inspection module group, which is stationary on the support frame 3, scans and sorts the parcels in the circular motion. Its corresponding AI processing module 5 generates sorting instructions and a sorting execution area based on the security inspection data, and pushes the parcels downstream of the platform through the sorting execution mechanism. The sorting execution principle is as follows: When the package rotates with the platform to the sorting execution mechanism station, the pneumatic push rod 61 is raised and lowered along the height adjustment guide rail 62 according to the AI ​​command to match the center of gravity of the package; the pneumatic push rod 61 is pushed out instantaneously along the tangential direction of the annular rotating platform 1, and the package is accurately thrown into the corresponding sorting slide group by the combined force of the centrifugal force provided by the annular rotating platform 1 and the thrust provided by the pneumatic push rod 61. The package slides down to the collection area through the inclined high-risk goods slide 71, suspicious goods slide 72 or safe goods slide 73, and the sorting is completed.

[0052] The working principle is as follows:

[0053] Before operation: Start the drive motor 12, which drives the ring rotary platform 1 to idle at a low speed of 1-2 r / min through the meshing of the gear set 13 and the internal gear ring 11, and detect the platform's levelness and vibration value. The edge computing node loads the security inspection algorithm, the multi-sensor fusion processor establishes a data channel, and the real-time sorting decision module connects to the control terminal of the sorting execution mechanism. The X-ray dual-view scanning chamber 41 performs a blank reference scan to calibrate the energy of the orthogonal X-ray source; the millimeter-wave scanning imaging plate 42 emits a test beam to adjust the antenna phase consistency; the metal detection structure's through-beam induction coil 432 performs zero-point drift compensation. The pneumatic push rod 61 descends to the lowest position along the height adjustment guide rail 62; the collection container is placed below the safety goods slide 73 of the sorting slide group.

[0054] During operation: A manual or robotic arm places packages into the recessed shelf of the package carrying unit; a piezoelectric sensor 81 collects weight data in real time, which is then transmitted to the AI ​​module 5 via a weight signal converter 82. The circular rotating platform 1 rotates at a constant speed of 2-5 r / min, and packages pass through the following stages in sequence: an X-ray dual-view scanning chamber 41 generates an orthogonal projection image of the package's interior; a millimeter-wave scanning imaging plate 42 constructs a dielectric distribution map of non-metallic materials; and a metal detection structure locates and classifies metallic objects. LED tubes 91 and infrared supplementary lights 92 on the top of the support frame 3 automatically supplement illumination to ensure clear imaging. A multi-sensor fusion processor correlates weight, X-ray structural images, and millimeter-wave data. The real-time sorting decision module outputs instructions: for high-risk packages, the pneumatic pusher 61 corresponding to the high-risk goods chute 71 is triggered; for suspicious packages, the pneumatic pusher 61 corresponding to the suspicious goods chute 72 is triggered; and for safe packages, the pneumatic pusher 61 corresponding to the safe goods chute 73 is triggered. The target pneumatic pusher 61 is raised and lowered along the height adjustment guide rail 62 to match the height of the package's center of gravity; when the package rotates to the tangent point of the sorting station, the pneumatic pusher is instantly pushed out: the magnitude of the thrust is dynamically adjusted by the weight of the package; the pushing direction is strictly along the rotation tangent of the platform. The package flies into the corresponding chute under the combined action of centrifugal force and thrust; it is then tilted and guided to the collection area via the high-risk goods chute 71 / suspicious goods chute 72 / safe goods chute 73.

[0055] After operation: Stop feeding and turn off drive motor 12 after the last package sorting is completed; AI processing module 5 saves the operation log and then disconnects power. Empty the residue in the storage slot of the package carrying unit; wipe the through-beam induction coil 432 of the metal detection structure with a soft cloth. Add grease to gear set 13; reset pneumatic push rod 61 to the lowest position of the guide rail and depressurize; check whether the wire of piezoelectric sensor 81 is worn.

[0056] Any content not described in detail in this specification is prior art known to those skilled in the art.

[0057] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A rotating package intelligent sorting, security check integrated device, characterized in that, include: A ring-shaped rotating platform (1) is provided at its edge with a drive mechanism for driving the ring-shaped rotating platform (1) to rotate around its own central axis; Multiple package carrying units, each of which has a recessed shelf on top and is connected to the annular rotating platform (1) via a support box (21); The support frame (3) is coaxially sleeved on the outside of the annular rotating platform (1); A multi-module security inspection module group is set on the inner peripheral wall of the support frame (3), and its detection end faces the radial center of the annular rotating platform (1); The AI ​​processing module (5) is located on the top of the support frame (3), and the input end of the AI ​​processing module (5) is electrically connected to the multi-module security inspection module group. The sorting execution mechanism is located on the downstream side of the annular rotating platform (1). The sorting execution mechanism includes a plurality of pneumatic push rods (61) arranged along the tangential direction of the annular rotating platform (1). The sorting chute assembly includes at least three inclined chutes, and the chutes are aligned with the pneumatic push rod (61).

2. The rotary intelligent parcel sorting and security inspection integrated device according to claim 1, characterized in that, The multi-module security inspection module group includes an X-ray dual-view scanning chamber (41), a millimeter-wave scanning imaging plate (42), and a metal detection structure. The X-ray dual-view scanning chamber (41) is located on the inner wall of the supporting frame (3). The millimeter-wave scanning imaging plate (42) is adjacent to the X-ray dual-view scanning chamber (41). The metal detection structure is located downstream of the millimeter-wave scanning imaging plate (42).

3. The rotary intelligent parcel sorting and security inspection integrated device according to claim 1, characterized in that, The drive mechanism includes an internal gear ring (11) and a gear set (13). The internal gear ring (11) is coaxially and fixedly connected to the annular rotating platform (1). The sun gear of the gear set (13) is connected to the output shaft of the drive motor (12). The planet gears of the gear set (13) mesh with the internal gear ring (11).

4. The rotary intelligent parcel sorting and security inspection integrated device according to claim 1, characterized in that, The AI ​​processing module (5) includes an edge computing node, a multi-sensor fusion processor, and a real-time sorting decision module. The edge computing node is installed on the top of the support frame (3). The multi-sensor fusion processor is connected to the edge computing node. The input end of the real-time sorting decision module is connected to the multi-sensor fusion processor. The output end of the real-time sorting decision module is connected to the control end of the sorting execution mechanism.

5. The rotary intelligent parcel sorting and security inspection integrated device according to claim 1, characterized in that, The sorting execution mechanism further includes a height adjustment guide rail (62) that is vertically fixed to the ground, and the pneumatic push rod (61) is slidably connected to the height adjustment guide rail (62) via a slider (63).

6. The rotary intelligent parcel sorting and security inspection integrated device according to claim 1, characterized in that, It also includes a piezoelectric sensor (81) embedded in the bottom of the recessed shelf and a weight signal converter (82) disposed in the cavity of the support box (21), wherein the piezoelectric sensor (81) is electrically connected to the weight signal converter (82).

7. The rotary intelligent parcel sorting and security inspection integrated device according to claim 1, characterized in that, The top of the support frame (3) is provided with LED light tubes (91) facing the plurality of packaged carrier units and infrared supplementary lights (92) spaced between the LED light tubes (91).

8. The rotary intelligent parcel sorting and security inspection integrated device according to claim 1, characterized in that, The sorting chute group includes: a high-risk goods chute (71) set up at the first sorting station directly opposite the pneumatic push rod (61), a suspicious goods chute (72) set up at the second sorting station directly opposite the pneumatic push rod (61), and a safe goods chute (73) set up at the third sorting station directly opposite the pneumatic push rod (61).

9. The rotary intelligent parcel sorting and security inspection integrated device according to claim 2, characterized in that, The metal detection structure includes a support frame (431) spanning above the annular rotating platform (1), and a through-beam induction coil (432) embedded in the column of the support frame (431).

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