Light source self-adjusting mini LED detection structure

Abstract

The application discloses a light source self-adjusting Mini LED detection structure and belongs to the Mini LED detection field. The Mini LED detection structure comprises a detection unit and a clamping unit. The inner end face of each set of pressing blocks can be attached to the outer end face of the stretching vertical strip plate. At this time, the strengthening mechanism arranged between each set of pressing blocks is located at the interval between each set of stretching vertical strip plates. The outer end face of the air pipe is connected to the air hole through the external air pipe. The gas is transported into the inner cavity of the pressing block through the external air pipe. At this time, the inner end face of the air hole is attached to the outer end face of the stretching vertical strip plate. At this time, the gas cannot be discharged outward through the air hole. The gas enters the inner cavity of the pressing block at both ends. At this time, the gas penetrates through the multiple sets of arranged air holes and is discharged outward. The airflow flows to the disturbance through the multiple sets of arranged air holes. The airflow impacts the outer surface of the Mini LED from all around, so that the anti-impact capability of the outer surface of the Mini LED is detected, and whether the product safety requirement is met.

Description

Technical Field

[0001] This invention relates to the field of Mini LED detection, and more specifically, to a Mini LED detection structure with self-adjusting light source. Background Technology

[0002] With the rapid development of Mini LED display technology, Mini LED display products have begun to be applied to ultra-large screen high-definition displays, such as monitoring and command, high-definition broadcasting, high-end cinemas, medical diagnosis, advertising displays, conferences and exhibitions, office displays, virtual reality and other commercial fields.

[0003] Patent No. CN202111444639.5 discloses a method and related equipment for detecting defects in Mini LED products. The method involves acquiring images of Mini LED products and using these images as the detection images; selecting a template feature database corresponding to the Mini LED product and inputting the detection images into the database; obtaining a reference image using a function library; obtaining a ghost image based on the detection image and the reference image using the ET algorithm; and marking pixels with gray values ​​greater than a threshold in the ghost image as defect points and pixels with gray values ​​less than the threshold as non-defect points.

[0004] This patent solves the problem that existing defect detection methods have large errors and are prone to detecting false defects; however, it cannot detect the impact resistance of the outer surface of Mini LEDs. Summary of the Invention

[0005] Technical problems to be solved

[0006] The purpose of this invention is to provide a Mini LED detection structure with self-adjusting light source to solve the problems mentioned in the background art.

[0007] Technical solution

[0008] A self-adjusting Mini LED detection structure includes a detection unit and a clamping unit. The detection unit includes a hand gripping mechanism and an auxiliary mechanism sleeved on the lower end face of the hand gripping mechanism. The two ends of the hand gripping mechanism are movably connected to the top end of the clamping unit. The clamping unit includes an inner clamping mechanism and a clamping ring frame disposed on the lower end face of the inner clamping mechanism.

[0009] Preferably, the hand grip mechanism includes a series ring and a hand grip frame disposed at both ends of the series ring, and the side end face of the hand grip frame is provided with a through hole.

[0010] Preferably, the inner cavity of the serial ring is movably connected to an auxiliary mechanism, the auxiliary mechanism including a mating ring block and an elastic rod disposed on the lower end face of the mating ring block, the outer surface of the elastic rod is provided with an elastic tension fan plate in a ring array, and the other end of the elastic rod and the elastic tension fan plate are provided with an auxiliary ring.

[0011] Preferably, the mating ring block is inserted into the inner cavity of the series ring from bottom to top, and both the outer end face of the mating ring block and the inner cavity wall of the series ring are configured with a threaded structure, and the series ring and the mating ring block are threadedly engaged.

[0012] Preferably, the auxiliary ring includes a pressing plate disposed on the bottom end face of the elastic rod. The other end of the elastic rod is connected to a pressure block, the inner end face of which has a vent hole. Each group of pressure blocks is connected in series via a reinforcing mechanism. The operator removes the inner bent rod from the inner cavity of the handgrip, and the pressing plate is inserted through the inner cavity of the inner clamping ring. After the inner end face of the elastic tension fan plate contacts the outer end face of the inner clamping ring downwards, it unfolds outwards using the contact point between the elastic tension fan plate and the elastic rod as a fulcrum, ensuring that the inner end face of each group of pressure blocks fits against the tension... The outer end face of the vertical strip plate, at this time the reinforcing mechanism set between each group of pressure blocks is located at the interval between each group of tension vertical strip plates, is connected to the outer end face of the vent hole through the external air pipe, and the gas is transported into the inner cavity of the pressure block through the external air pipe. At this time, because the inner end face of the vent hole is in contact with the outer end face of the tension vertical strip plate, the gas cannot be discharged outward through the vent hole. The gas enters the inner cavity of the pressure block at both ends. At this time, the gas passes through the multiple sets of vent holes and is discharged outward. The airflow direction is disrupted by the multiple sets of vent holes. The airflow impacts the outer surface of the Mini LED from all sides, thereby testing the impact resistance of the outer surface of the Mini LED and whether it meets the product safety requirements.

[0013] Preferably, the reinforcing mechanism string includes a connecting block and an inner slot disposed in the inner cavity of the connecting block, and the inner end face of the connecting block is provided with a series of blocking rods.

[0014] Preferably, the inner groove penetrates the inner cavity of the pressure block, and the arranged blocking rod is a component made of synthetic rubber.

[0015] Preferably, the inner clamping mechanism includes an inner insertion bent rod and an inner clamping ring disposed at the other end of the inner insertion bent rod. A contact cover is installed on the lower end face of the inner clamping ring. After positioning is completed, an elastic ball is disposed on the upper end face of the inner clamping ring. The elastic ball can be directly inserted into the inner cavity of the inner clamping ring and clamped with its inner cavity wall. When the operator presses down on the entire detection unit, when the elastic ball presses down and contacts the auxiliary ring, the bottom end face of the pressing plate continuously presses the elastic ball, causing the elastic ball to pass through the inner cavity of the inner clamping ring and fall directly above the positioned Mini LED. The impact resistance of the Mini LED is tested by the gravity generated by the falling elastic ball.

[0016] Preferably, a clamping ring frame is installed on the lower end face of the contact cover. The clamping ring frame includes an assembly ring and a ring array of stretching vertical plates arranged on the outer end face of the assembly ring. An outer bonding block is installed on the other end of the stretching vertical plates. The inner end face of the outer bonding block is provided with a through hole. The operator holds both ends of the hand grip frame from the outside to the inside, adjusting the hand grip mechanism to be directly above the Mini LED to be tested. The lower end face of the clamping ring frame is then attached to the Mini LED to be tested, and the outer surface of the Mini LED is clamped by the inner end face of the outer bonding block. The assembly ring, stretching vertical plates, and outer bonding block are linked. When the diameter of the outer end face of the Mini LED is larger than the ring structure composed of multiple sets of outer bonding blocks, the outer bonding block can expand outward with the upper end face of the stretching vertical plates as a fulcrum until the inner end face of the outer bonding block can completely cover the outer surface of the Mini LED. The contact cover covers the upper end face of the Mini LED. The entire device can position the Mini LED and prevent the Mini LED from being damaged. The LED shifted due to shaking during the testing process.

[0017] Preferably, the inner insert rod is inserted into the inner cavity of the hand grip from bottom to top, so that the inner insert rod, the hand grip, the inner clamping ring and the inner cavity of the contact cover are connected.

[0018] Beneficial effects

[0019] Compared with the prior art, the advantages of this invention are:

[0020] 1. The operator grasps both ends of the handgrip from the outside in, adjusting the handgrip mechanism to be directly above the Mini LED to be tested. The lower end of the clamping ring is then placed against the Mini LED. The inner end of the outer bonding block clamps the outer surface of the Mini LED. The assembly ring, tension vertical plate, and outer bonding block linkage structure allow the outer bonding block to expand outward with the upper end of the tension vertical plate as a fulcrum when the diameter of the Mini LED's outer end face is larger than the annular structure composed of multiple sets of outer bonding blocks. This expansion continues until the inner end face of the outer bonding block completely covers the outer surface of the Mini LED. The contact cover then covers the upper end face of the Mini LED. The entire device positions the Mini LED, preventing it from shifting due to shaking during testing.

[0021] 2. After positioning is completed, an elastic ball is set on the upper end face of the inner clamping ring. The elastic ball can be directly inserted into the inner cavity of the inner clamping ring and clamped with its inner cavity wall. When the staff presses down on the entire detection unit, when the elastic ball presses down and contacts the auxiliary ring, the bottom end face of the pressing plate continuously presses the elastic ball, causing the elastic ball to pass through the inner cavity of the inner clamping ring and fall directly above the positioned Mini LED. The impact resistance of the Mini LED is tested by the gravity generated by the falling elastic ball.

[0022] 3. The operator removes the inner bent rod from the inner cavity of the hand-held frame, inserts the pressure plate through the inner cavity of the inner clamping ring, and after the inner end face of the elastic tension fan plate contacts the outer end face of the inner clamping ring, it unfolds outward with the contact point between the elastic tension fan plate and the elastic rod as the fulcrum, so that the inner end face of each group of pressure blocks can fit against the outer end face of the tension vertical strip. At this time, the reinforcing mechanism set between each group of pressure blocks is located at the interval between each group of tension vertical strips. It is connected to the outer end face of the vent through the external air pipe, and the gas is delivered into the inner cavity of the pressure block through the external air pipe. At this time, because the inner end face of the vent is in contact with the outer end face of the tension vertical strip, the gas cannot be discharged outward through the vent. The gas enters the inner cavity of the pressure block at both ends. At this time, the gas passes through the multiple sets of vents and is discharged outward. The multiple sets of vents disrupt the airflow direction, and the airflow impacts the outer surface of the Mini LED from all sides, thereby testing the impact resistance of the outer surface of the Mini LED and whether it meets the product safety requirements. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a self-adjusting Mini LED detection structure according to the present invention.

[0024] Figure 2 This is a schematic diagram of the detection unit structure of a Mini LED detection structure with self-adjusting light source according to the present invention;

[0025] Figure 3 This is an exploded view of the detection unit of a Mini LED detection structure with self-adjusting light source according to the present invention.

[0026] Figure 4 This is a schematic diagram of the auxiliary ring structure of a Mini LED detection structure with self-adjusting light source according to the present invention;

[0027] Figure 5 This is a schematic diagram of the reinforcing mechanism of a Mini LED detection structure with self-adjusting light source according to the present invention;

[0028] Figure 6 This is a schematic diagram of the internal clamping mechanism of a Mini LED detection structure with self-adjusting light source according to the present invention;

[0029] Figure 7 This is a schematic diagram of the clamping ring structure of a Mini LED detection structure with self-adjusting light source according to the present invention.

[0030] Reference numerals: 1. Detection unit; 11. Hand grip mechanism; 111. Series ring; 112. Hand grip frame; 113. Through hole; 12. Auxiliary mechanism; 121. Matching ring block; 122. Elastic rod; 123. Elastic tension fan plate; 124. Auxiliary ring; 1241. Pressing plate; 1242. Pressing block; 1243. Vent hole; 1244. Reinforcing mechanism; 12441. Connecting block; 12442. Internal slot; 12443. Arrangement blocking rod; 2. Clamping unit; 21. Internal clamping mechanism; 211. Internal inserted bent rod; 212. Internal clamping ring; 213. Contact cover; 22. Clamping ring frame; 221. Assembly ring; 222. Tension vertical strip plate; 223. External bonding block; 224. Through hole. Detailed Implementation

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Please see Figures 1-7 The present invention provides a technical solution:

[0035] Example 1

[0036] A self-adjusting Mini LED detection structure includes a detection unit 1 and a clamping unit 2. The detection unit 1 includes a gripping mechanism 11 and an auxiliary mechanism 12 sleeved on the lower end face of the gripping mechanism 11. The two ends of the gripping mechanism 11 are movably connected to the top end of the clamping unit 2. The clamping unit 2 includes an inner clamping mechanism 21 and a clamping ring frame 22 disposed on the lower end face of the inner clamping mechanism 21. The gripping mechanism 11 includes a series ring 111 and gripping frames 112 disposed at both ends of the series ring 111. A through hole 113 is opened on the side end face of the gripping frame 112. The auxiliary mechanism 12 is movably connected to the inner cavity of the series ring 111. The auxiliary mechanism 12 includes a mating ring block 121 and an elastic rod 122 disposed on the lower end face of the mating ring block 121. An elastic tension fan plate 123 is arranged in a ring array on the outer surface of the elastic rod 122. An auxiliary ring 124 is provided at the other end of both the elastic rod 122 and the elastic tension fan plate 123.

[0037] The mating ring block 121 is inserted into the inner cavity of the series ring 111 from bottom to top. The outer end face of the mating ring block 121 and the inner cavity wall of the series ring 111 are both set as threaded structures, and the series ring 111 and the mating ring block 121 are threadedly engaged.

[0038] The auxiliary ring 124 includes a pressing plate 1241, which is disposed on the bottom end face of the elastic rod 122. The other end of the elastic rod 122 is connected to a pressure block 1242. The inner end face of the pressure block 1242 is provided with a vent hole 1243. Each set of pressure blocks 1242 is connected in series by a reinforcing mechanism 1244. The operator removes the inner bent rod 211 from the inner cavity of the handgrip 112. The pressing plate 1241 is inserted through the inner cavity of the inner clamping ring 212. After the inner end face of the elastic tension fan plate 123 contacts the outer end face of the inner clamping ring 212 downwards, it unfolds outwards with the contact point between the elastic tension fan plate 123 and the elastic rod 122 as the fulcrum, so that the inner end face of each set of pressure blocks 1242 can be in contact with the inner end face of the inner clamping ring 212. The reinforcing mechanism 1244 between each group of pressure blocks 1242 is located at the interval between each group of pressure blocks 222, and is connected to the outer end face of the vent 1243 through an external air pipe. The gas is delivered into the inner cavity of the pressure block 1242 through the external air pipe. At this time, because the inner end face of the vent 1243 is in contact with the outer end face of the pressure block 222, the gas cannot be discharged outward through the vent 1243. The gas enters the inner cavity of the pressure block 1242 at both ends. At this time, the gas passes through the multiple sets of vents 1243 and is discharged outward. The airflow direction is disrupted by the multiple sets of vents 1243. The airflow impacts the outer surface of the Mini LED from all sides, thereby testing the impact resistance of the outer surface of the Mini LED and whether it meets the product safety requirements.

[0039] Example 2

[0040] The reinforcing mechanism 1244 includes a connecting block 12441 and an inner slot 12442 disposed in the inner cavity of the connecting block 12441. A series of blocking rods 12443 are arranged on the inner end face of the connecting block 12441. The inner slot 12442 penetrates the inner cavity of the pressure block 1242. The blocking rods 12443 are made of synthetic rubber. The inner clamping mechanism 21 includes an inner inserting bent rod 211 and an inner clamping ring 212 disposed at the other end of the inner inserting bent rod 211. A contact cover 213 is installed on the lower end face of the 12. After positioning is completed, an elastic ball is provided on the upper end face of the inner clamping ring 212. The elastic ball can be directly inserted into the inner cavity of the inner clamping ring 212 and clamped with its inner cavity wall. When the operator presses down on the entire detection unit 1, the elastic ball presses down and contacts the auxiliary ring 124. The bottom end face of the pressing plate 1241 continuously presses the elastic ball, causing the elastic ball to pass through the inner cavity of the inner clamping ring 212 and fall directly above the positioned Mini LED. The impact resistance of the Mini LED is tested by the gravity generated by the falling elastic ball.

[0041] Example 3

[0042] A clamping ring frame 22 is installed on the lower end face of the contact cover 213. The clamping ring frame 22 includes an assembly ring 221 and a ring array of stretching vertical strips 222 arranged on the outer end face of the assembly ring 221. An outer bonding block 223 is installed on the other end of the stretching vertical strip 222. The inner end face of the outer bonding block 223 is provided with a through hole 224. The operator holds the two ends of the hand grip 112 from the outside to the inside, so that the hand grip mechanism 11 is adjusted to be directly above the Mini LED to be tested. The lower end face of the clamping ring frame 22 is attached to the Mini LED to be tested, and the outer surface of the Mini LED is clamped by the inner end face of the outer bonding block 223. The assembly ring 221, stretching vertical strip 222 and outer bonding block 223 are connected in a linkage structure. When the Mini LED is in use, the clamping ring frame 222 is attached to the upper end face of the Mini LED to be tested. The outer surface of the Mini LED is clamped by the inner end face of the outer bonding block 223. When the diameter of the outer end face of the LED is larger than the annular structure composed of multiple sets of outer bonding blocks 223, the outer bonding block 223 can expand outward with the upper end face of the stretching vertical strip 222 as the fulcrum until the inner end face of the outer bonding block 223 can completely wrap the outer surface of the Mini LED. The contact cover 213 wraps the upper end face of the Mini LED, and the whole device can position the Mini LED to prevent the Mini LED from shifting due to shaking during the detection process. The inner insertion bent rod 211 is inserted into the inner cavity of the hand grip 112 from bottom to top, so that the inner insertion bent rod 211, the hand grip 112, the inner clamping ring 212 and the inner cavity of the contact cover 213 are connected.

[0043] In summary: A self-adjusting Mini LED detection structure includes a detection unit 1 and a clamping unit 2. The detection unit 1 includes a hand-holding mechanism 11 and an auxiliary mechanism 12 sleeved on the lower end face of the hand-holding mechanism 11. Both ends of the hand-holding mechanism 11 are movably connected to the top of the clamping unit 2. The clamping unit 2 includes an inner clamping mechanism 21 and a clamping ring frame 22 disposed on the lower end face of the inner clamping mechanism 21. The operator's hands grip both ends of the hand-holding frame 112 from the outside to the inside, adjusting the hand-holding mechanism 11 to be directly above the Mini LED to be detected. The lower end face of the clamping ring frame 22 is then attached to the Mini LED to be detected. The outer surface of the Mini LED is clamped by the inner end face of the outer bonding block 223. The assembly ring 221, the stretching vertical strip 222, and the outer bonding block 223 are linked in a structure that allows the Mini LED to be detected to move when the light source is adjusted. When the diameter of the outer end face of the LED is larger than the annular structure composed of multiple sets of outer bonding blocks 223, the outer bonding block 223 can expand outward with the upper end face of the stretching vertical strip 222 as the fulcrum until the inner end face of the outer bonding block 223 can completely wrap the outer surface of the Mini LED. The contact cover 213 wraps the upper end face of the Mini LED, and the whole device can position the Mini LED to prevent the Mini LED from shifting due to shaking during the detection process.

[0044] After positioning is completed, an elastic ball is provided on the upper end face of the inner clamping ring 212. The elastic ball can be directly inserted into the inner cavity of the inner clamping ring 212 and clamped with its inner cavity wall. When the staff presses down on the entire detection unit 1, when the elastic ball presses down and contacts the auxiliary ring 124, the bottom end face of the pressing plate 1241 continuously presses the elastic ball, causing the elastic ball to pass through the inner cavity of the inner clamping ring 212 and fall directly above the positioned Mini LED. The impact resistance of the Mini LED is tested by the gravity generated by the falling elastic ball.

[0045] The operator removes the inner bent rod 211 from the inner cavity of the handgrip 112, presses the pressure plate 1241 through the inner cavity of the inner clamping ring 212, and after the inner end face of the elastic tension fan plate 123 contacts the outer end face of the inner clamping ring 212 downwards, it unfolds outwards with the contact point between the elastic tension fan plate 123 and the elastic rod 122 as the fulcrum, so that the inner end face of each group of pressure blocks 1242 can fit against the outer end face of the tension vertical bar 222. At this time, the reinforcing mechanism 1244 set between each group of pressure blocks 1242 is positioned at the tension vertical bar 222. At the interval between them, an external air pipe is connected to the outer end face of the vent 1243 to deliver gas into the inner cavity of the pressure block 1242. At this time, because the inner end face of the vent 1243 is in contact with the outer end face of the stretching vertical strip 222, the gas cannot be discharged outward through the vent 1243. The gas enters the inner cavity of the pressure block 1242 at both ends. At this time, the gas passes through the multiple sets of vents 1243 and is discharged outward. The multiple sets of vents 1243 disrupt the airflow direction, and the airflow impacts the outer surface of the Mini LED from all sides, thereby testing the impact resistance of the outer surface of the Mini LED and whether it meets the product safety requirements.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Mini LED detection structure with self-adjusting light source, characterized in that, The device includes a detection unit (1) and a clamping unit (2). The detection unit (1) includes a hand gripping mechanism (11) and an auxiliary mechanism (12) sleeved on the lower end face of the hand gripping mechanism (11). The two ends of the hand gripping mechanism (11) are movably connected to the top end of the clamping unit (2). The clamping unit (2) includes an inner clamping mechanism (21) and a clamping ring frame (22) disposed on the lower end face of the inner clamping mechanism (21). The hand grip mechanism (11) includes a series ring (111) and a hand grip frame (112) disposed at both ends of the series ring (111). The side end face of the hand grip frame (112) is provided with a through hole (113). An auxiliary mechanism (12) is movably connected to the inner cavity of the series ring (111). The auxiliary mechanism (12) includes a mating ring block (121) and an elastic rod (122) disposed on the lower end face of the mating ring block (121). An elastic tension fan plate (123) is arranged in annular array on the outer surface of the elastic rod (122). An auxiliary ring (124) is provided at the other end of both the elastic rod (122) and the elastic tension fan plate (123). The auxiliary ring (124) includes a pressing plate (1241), which is disposed on the bottom end face of the elastic rod (122). The other end of the elastic rod (122) is connected to a pressure block (1242). The inner end face of the pressure block (1242) is provided with a vent hole (1243). Each set of pressure blocks (1242) is connected in series through a reinforcing mechanism (1244). The reinforcing mechanism (1244) includes a connecting block (12441) and an inner slot (12442) provided in the inner cavity of the connecting block (12441). The inner end face of the connecting block (12441) is provided with a series of blocking rods (12443). The inner slot (12442) passes through the inner cavity of the pressure block (1242), and the arrangement of the blocking rod (12443) is a component made of synthetic rubber. The inner clamping mechanism (21) includes an inner insertion bent rod (211) and an inner clamping ring (212) disposed at the other end of the inner insertion bent rod (211). A contact cover (213) is installed on the lower end face of the inner clamping ring (212). The lower end face of the contact cover (213) is equipped with a clamping ring frame (22). The clamping ring frame (22) includes an assembly ring (221) and a ring array of stretching vertical strips (222) arranged on the outer end face of the assembly ring (221). The other end of the stretching vertical strips (222) is equipped with an outer bonding block (223). The inner end face of the outer bonding block (223) is provided with a through hole (224).

2. The Mini LED detection structure with self-adjusting light source according to claim 1, characterized in that: The mating ring block (121) is inserted into the inner cavity of the series ring (111) from bottom to top. The outer end face of the mating ring block (121) and the inner cavity wall of the series ring (111) are both set as threaded structures, and the series ring (111) and the mating ring block (121) are threaded together.

3. The Mini LED detection structure with self-adjusting light source according to claim 1, characterized in that: The inner insertion rod (211) is inserted into the inner cavity of the hand grip (112) from bottom to top, so that the inner insertion rod (211), the hand grip (112), the inner clamping ring (212) and the inner cavity of the contact cover (213) are connected.

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