A mounting bracket for underwater acoustic equipment

Abstract

This utility model relates to the field of marine surveying technology and provides an underwater acoustic equipment mounting bracket, comprising: an assembly plate; an assembly mechanism fixedly connected to the bottom of the assembly plate, the assembly mechanism being used to assemble an acoustic detector; and an extension frame mechanism assembled to the top of the assembly plate, wherein a connecting rope mechanism is provided between the extension frame mechanism and the assembly plate, the connecting rope mechanism being used to connect the assembly plate and the extension frame mechanism. The underwater acoustic equipment mounting bracket provided by this solution uses the extension frame mechanism to allow the assembly plate and the acoustic detection equipment inside the assembly mechanism to enter the water. During continuous extension, the connecting rope mechanism connects to the assembly plate. During the rope release process by the winding mechanism, the device submerges to the corresponding depth in the water for detection. After detection is completed, the connecting rope mechanism retracts, causing the connecting rope mechanism to pull the assembly plate to the bottom of the extension frame mechanism, where a positioning mechanism positions the assembly plate.

Description

Technical Field

[0001] This utility model belongs to the field of marine surveying and mapping technology, and in particular relates to an underwater acoustic equipment mounting bracket. Background Technology

[0002] Underwater acoustic equipment is specialized equipment used for underwater detection, location, and communication using sound waves as the medium. It mainly includes sonar and related auxiliary devices. Its core function is to detect, locate, and communicate with underwater targets by utilizing the propagation characteristics of sound waves in water. Active equipment actively emits sound waves and receives reflected signals, and is commonly used in military anti-submarine warfare and marine exploration; passive equipment only receives the sound emitted by the target and is suitable for monitoring underwater activities.

[0003] Chinese patent CN222188389U discloses a dual-probe mounting bracket for shipborne underwater acoustic equipment. The document states that "the main body of the mounting bracket is made of stainless steel tubing, including a fixing unit, a connecting part, and a mounting part connected sequentially from top to bottom. The fixing unit has a split structure, including a fixing base mounted on the ship's side and a semi-circular cover plate bolted to it. A through hole is formed between the fixing base and the semi-circular cover plate, perpendicular to the bow direction. The connecting part has an L-shaped structure, with a vertical rod and a horizontal rod. The horizontal rod is movably inserted into the through hole, and a limiting block is provided at the end of the horizontal rod away from the vertical rod. Two symmetrical lifting lugs are provided at the bottom of the vertical rod. The mounting part has a short section connected to the vertical rod and a crossbeam connected to the short section. Below the crossbeam..." Two mounting flanges are fixed at the front and rear. A reinforcing rib is provided at the connection between the upright and the crossbar. The lifting lug has a U-shaped structure. The limiting block is welded to the crossbar. The reinforcing rib has a triangular structure. The advantages and technical effects of this utility model are: by providing two mounting flanges at the front and rear on the mounting part, the bracket can simultaneously mount two probes; by adopting a structure where the connecting part and the fixed unit are movably connected, and by providing lifting lugs on both sides of the connecting part, the lifting lugs are used to connect to a traction rope, and the bracket can be kept in a set state by traction. That is, when the underwater acoustic equipment is working, the bracket is centrally and stably positioned underwater; when the underwater acoustic equipment is not working, it is raised to the surface, reducing the number of times the underwater acoustic equipment is installed and disassembled, avoiding damage to the underwater acoustic equipment. This reduces workload, lowers work intensity, and improves construction efficiency while reducing the risk of damage to the underwater acoustic equipment.

[0004] However, the above-mentioned solution has a relatively fixed support height, which limits its detection capabilities when installing acoustic equipment that needs to be submerged at different depths underwater. Therefore, it is necessary to design an underwater acoustic equipment mounting bracket. Utility Model Content

[0005] This utility model provides an underwater acoustic equipment mounting bracket, which aims to solve the problem that the current bracket has a relatively fixed height, resulting in a large limitation in detection when installing acoustic equipment that needs to be submerged at different depths underwater.

[0006] This utility model is implemented as follows: an underwater acoustic equipment mounting bracket includes: an assembly plate; an assembly mechanism fixedly connected to the bottom of the assembly plate, the assembly mechanism being used to assemble acoustic detectors; an extension frame mechanism assembled on the top of the assembly plate, the extension frame mechanism being provided with a connecting rope mechanism between the extension frame mechanism and the assembly plate, the connecting rope mechanism being used to connect the assembly plate and the extension frame mechanism; a winding mechanism assembled on the top of the extension frame mechanism, the winding mechanism being used to automatically wind up the connecting rope mechanism; positioning mechanisms assembled on both sides of the connecting rope mechanism, the positioning mechanisms being used to position the connecting rope mechanism after the winding mechanism winds up the connecting rope mechanism; a propeller fixed on both sides of the assembly plate; and a steering mechanism fixed on the bottom of the assembly plate, the steering mechanism being used to steer the entire equipment; buoyancy adjusters fixed on both sides of the top of the assembly plate, the buoyancy adjusters being used to control the lifting height of the equipment; and a fixing mechanism provided on one side of the extension frame mechanism, the fixing mechanism being used to fix the equipment and the hull.

[0007] Preferably, the assembly mechanism includes: a fixing frame fixed to the bottom of the assembly plate, the interior of which is used for inserting and loading acoustic detection equipment; and a pneumatic telescopic rod fixed to the upper part of the interior of the fixing frame, the pneumatic telescopic rod being used to press and fix the acoustic detection equipment loaded inside the fixing frame.

[0008] Preferably, an elastic pressing ball is fixedly connected to the extension end of the pneumatic telescopic rod, the elastic pressing ball being made of anti-slip material, and the pneumatic telescopic rod is fixedly connected to both sides of the upper part of the fixed frame.

[0009] Preferably, the fixing frame is located inside the assembly plate below, and the bottom plate of the fixing frame is concave.

[0010] Preferably, the extension frame mechanism includes: a fixed cylinder fixed to one side of the hull, with a fixing mechanism provided between the fixed cylinder and the hull; and a second pneumatic telescopic rod fixed inside the fixed cylinder, with an extension rod fixedly connected to the extension end of the second pneumatic telescopic rod, the extension rod being inserted into the interior of the fixed cylinder.

[0011] Preferably, the connecting rope mechanism includes: a slot at the bottom of the extension rod, with a cross-shaped insert fixedly connected inside the slot; a fixing block one fixed at the top center of the assembly plate, with a cross-shaped slot inside the fixing block one, the cross-shaped insert being adapted to be inserted into the cross-shaped slot; a steel wire rope fixed to the top of the fixing block one, the top of the steel wire rope being inserted into the extension frame mechanism, the top of the steel wire rope being fixed to the winding mechanism; and a telescopic hole inside the extension rod, with telescopic holes on both sides inside the extension rod, and a steel wire rope being inserted through the telescopic holes on both sides.

[0012] Preferably, the positioning mechanism includes: a second fixing block fixed to both sides of the fixing cylinder, wherein an electric push rod is fixedly connected inside the second fixing block; and insertion holes opened on both sides inside the first fixing block, wherein the extension end of the electric push rod is adapted to be inserted into the inside of the insertion hole.

[0013] Preferably, the winding mechanism includes: a fixed frame fixed to the top of the fixed cylinder; a motor fixed to both sides of the fixed frame, the output end of the motor being fixedly connected to a winding shaft, and the outer side of the winding shaft being wound with steel wire rope.

[0014] Preferably, the steering mechanism includes: a second motor fixed to the bottom of the assembly plate, and a second propeller fixedly connected to the output end of the second motor.

[0015] Preferably, the fixing mechanism includes: a fixing piece one fixed to one side of the fixing frame; a sleeve sleeved on the bottom of the outer side of the fixing cylinder; and a fixing piece two fixed to one side of the sleeve.

[0016] Compared with related technologies, the underwater acoustic equipment mounting bracket provided by this utility model has the following advantages:

[0017] After the equipment is fixed to the hull, the extension frame mechanism is activated to allow the assembly plate and the acoustic detection equipment inside the assembly mechanism to enter the water. During the continuous extension process, the connecting rope mechanism connects to the assembly plate. During the rope release process of the winding mechanism, the equipment submerges to the corresponding height in the water for detection. After the detection is completed, the connecting rope mechanism is retracted to pull the assembly plate to the bottom of the extension frame mechanism. The positioning mechanism positions the assembly plate. The propeller and steering mechanism enable the automatic movement and steering of the equipment. The buoyancy regulator can assist the equipment in rising or submerging. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention from one side view;

[0019] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another side view;

[0020] Figure 3 This is a structural schematic diagram of the present invention viewed from below;

[0021] Figure 4 This is a front view of the internal structure of this utility model;

[0022] Figure 5 This utility model Figure 3 Enlarged structural diagram at point A;

[0023] Figure 6 This utility model Figure 4 A magnified structural diagram at point B in the middle.

[0024] In the diagram: 1. Assembly plate; 2. Assembly mechanism; 201. Fixing frame; 202. Pneumatic telescopic rod one; 203. Elastic pressing ball; 3. Extension frame mechanism; 301. Fixing cylinder; 302. Pneumatic telescopic rod two; 303. Extension rod; 4. Connecting rope mechanism; 401. Groove; 402. Telescopic hole; 403. Steel wire rope; 404. Cross-shaped insert; 405. Fixing block one; 406. Cross-shaped slot; 5. Positioning mechanism; 501, insertion hole; 502, fixing block two; 503, electric push rod; 6, winding mechanism; 601, fixing frame; 602, motor one; 603, winding shaft; 7, propeller one; 8, steering mechanism; 801, motor two; 802, propeller two; 9, buoyancy adjuster; 10, fixing mechanism; 1001, fixing plate one; 1002, sleeve; 1003, fixing plate two. Detailed Implementation

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] Example 1

[0028] A preferred embodiment of the underwater acoustic equipment mounting bracket provided by this utility model is as follows: Figures 1 to 6 As shown: An underwater acoustic equipment mounting bracket includes: an assembly plate 1; an assembly mechanism 2 fixedly connected to the bottom of the assembly plate 1, the assembly mechanism 2 being used to assemble acoustic detectors; an extension frame mechanism 3 mounted on the top of the assembly plate 1, a connecting rope mechanism 4 provided between the extension frame mechanism 3 and the assembly plate 1, the connecting rope mechanism 4 being used to connect the assembly plate 1 and the extension frame mechanism 3; a winding mechanism 6 mounted on the top of the extension frame mechanism 3, the winding mechanism 6 being used to automatically wind up the connecting rope mechanism 4; positioning mechanisms 5 mounted on both sides of the connecting rope mechanism 4, the positioning mechanisms 5 being used to position the connecting rope mechanism 4 after the winding mechanism 6 winds up the connecting rope mechanism 4; propellers 7 fixed on both sides of the assembly plate 1, and a steering mechanism 8 fixed on the bottom of the assembly plate 1, the steering mechanism 8 being used to steer the entire equipment; buoyancy adjusters 9 fixed on both sides of the top of the assembly plate 1, the buoyancy adjusters 9 being used to control the lifting height of the equipment; and a fixing mechanism 10 provided on one side of the extension frame mechanism 3, the fixing mechanism 10 being used to fix the equipment and the hull.

[0029] It should be noted that some existing underwater acoustic equipment mounting brackets still have certain shortcomings in actual use. In the comparison documents, due to the relatively fixed height of the brackets, the detection is limited when installing acoustic equipment that needs to be submerged at different depths underwater, resulting in inconvenience in use.

[0030] In this embodiment, after the equipment is fixed to the hull, the extension frame mechanism 3 is activated to allow the mounting plate 1 and the acoustic detection equipment inside the mounting mechanism 2 to enter the water. During the continuous extension process, the connecting rope mechanism 4 connects to the mounting plate 1. During the release of the rope by the winding mechanism 6, the equipment dives to the corresponding height in the water for detection. After the detection is completed, the connecting rope mechanism 4 is retracted to pull the mounting plate 1 to the bottom of the extension frame mechanism 3. The positioning mechanism 5 positions the mounting plate 1. The propeller 7 and the steering mechanism 8 can realize the automatic movement and steering of the equipment. The buoyancy regulator 9 can assist the equipment to float up or dive down.

[0031] In a further preferred embodiment of the present invention, the assembly mechanism 2 includes: a fixing frame 201 fixed to the bottom of the assembly plate 1, the interior of the fixing frame 201 being used for inserting and loading acoustic detection equipment; and a pneumatic telescopic rod 202 fixed to the upper part of the interior of the fixing frame 201, the pneumatic telescopic rod 202 being used for pressing and fixing the acoustic detection equipment loaded inside the fixing frame 201.

[0032] In this embodiment, the top of the acoustic detection device can be squeezed and fixed by the pneumatic telescopic rod 202.

[0033] In a further preferred embodiment of this utility model, an elastic pressing ball 203 is fixedly connected to the extension end of the pneumatic telescopic rod 202. The elastic pressing ball 203 is made of anti-slip material. The pneumatic telescopic rod 202 is fixedly connected to both sides of the upper part of the fixing frame 201.

[0034] In this embodiment, the elastic pressing ball 203 can squeeze the acoustic detection device fixed inside the fixing frame 201 from both sides.

[0035] In a further preferred embodiment of the present invention, the fixing frame 201 is distributed inside the assembly plate 1 below, and the bottom plate of the fixing frame 201 is concave.

[0036] In this embodiment, the mounting bracket 201 and its concave surface are adapted to accommodate different acoustic detection devices.

[0037] In a further preferred embodiment of the present invention, the extension frame mechanism 3 includes: a fixed cylinder 301 fixed to one side of the hull, a fixing mechanism 10 provided between the fixed cylinder 301 and the hull; a pneumatic telescopic rod 302 fixed inside the fixed cylinder 301, an extension rod 303 fixedly connected to the extension end of the pneumatic telescopic rod 302, and the extension rod 303 inserted into the interior of the fixed cylinder 301.

[0038] In this embodiment, the extension rod 303 can be extended and the assembly plate 1 can be extended by activating the pneumatic telescopic rod 302.

[0039] Example 2

[0040] Based on Embodiment 1, a preferred embodiment of the underwater acoustic equipment mounting bracket provided by this utility model is as follows: Figures 1 to 6 As shown: The connecting rope mechanism 4 includes: a slot 401 at the bottom of the extension rod 303, with a cross-shaped insert 404 fixedly connected inside the slot 401; a fixing block 405 fixed at the top center of the assembly plate 1, with a cross-shaped slot 406 inside the fixing block 405, and the cross-shaped insert 404 fitting into the cross-shaped slot 406; a steel wire rope 403 fixed at the top of the fixing block 405, with the top of the steel wire rope 403 passing through the extension frame mechanism 3, and the top of the steel wire rope 403 fixed to the winding mechanism 6; and a telescopic hole 402 inside the extension rod 303, with telescopic holes 402 on both sides inside the extension rod 303, and the steel wire rope 403 inserted through the telescopic holes 402 on both sides.

[0041] In this embodiment, the extension frame mechanism 3 and the assembly plate 1 can be connected by the wire rope 403. After the winding mechanism 6 winds up the wire rope 403, the cross-shaped insert 404 can be adapted to be inserted into the cross-shaped slot 406 to fix the extension frame mechanism 3 and the assembly plate 1.

[0042] In a further preferred embodiment of the present invention, the positioning mechanism 5 includes: a second fixing block 502 fixed to both sides of the fixing cylinder 301, and an electric push rod 503 fixedly connected inside the second fixing block 502; and insertion holes 501 opened on both sides inside the first fixing block 405, with the extended end of the electric push rod 503 adapted to be inserted into the inside of the insertion hole 501.

[0043] In this embodiment, activating the electric push rod 503 allows its extended end to be inserted into the insertion hole 501 to fix the fixing block 405 and the fixing cylinder 301.

[0044] In a further preferred embodiment of the present invention, the winding mechanism 6 includes: a fixed frame 601 fixed to the top of the fixed cylinder 301; a motor 602 fixed to both sides of the fixed frame 601, the output end of the motor 602 being fixedly connected to a winding shaft 603, and a steel wire rope 403 being wound around the outside of the winding shaft 603.

[0045] In this embodiment, starting the motor 602 can cause the wire rope 403 to pull the fixed block 405 upward.

[0046] In a further preferred embodiment of the present invention, the steering mechanism 8 includes: a second motor 801 fixed to the bottom of the assembly plate 1, and a second propeller 802 fixedly connected to the output end of the second motor 801.

[0047] In this embodiment, the starter motor 801 can steer the propeller 802 to adjust the direction of the equipment.

[0048] In a further preferred embodiment of the present invention, the fixing mechanism 10 includes: a fixing piece 1001 fixed to one side of the fixing frame 601; a sleeve 1002 sleeved on the bottom of the outer side of the fixing cylinder 301; and a fixing piece 1003 fixed to one side of the sleeve 1002.

[0049] In this embodiment, the device can be stably fixed to the hull by screws through the fixed plate 1001 and the fixed plate 1003.

[0050] In summary, after the equipment is fixed to the side of the hull, the extension frame mechanism 3 is activated to allow the acoustic detection equipment inside the assembly plate 1 and assembly mechanism 2 to enter the water. During the continuous extension process, the connecting rope mechanism 4 connects to the assembly plate 1. During the rope release process of the winding mechanism 6, the equipment submerges to the corresponding height in the water for detection. After the detection is completed, the connecting rope mechanism 4 is retracted to pull the assembly plate 1 to the bottom of the extension frame mechanism 3. The positioning mechanism 5 positions the assembly plate 1. The propeller 7 and the steering mechanism 8 can realize the automatic movement and steering of the equipment. The buoyancy regulator 9 can assist the equipment in rising or submerging.

[0051] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0052] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0053] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A mounting bracket for underwater acoustic equipment, characterized in that, include: Assembly plate (1); assembly mechanism (2) fixedly connected to the bottom of the assembly plate (1), the assembly mechanism (2) being used to assemble the acoustic detector; An extension frame mechanism (3) is mounted on the top of the assembly plate (1), and a connecting rope mechanism (4) is provided between the extension frame mechanism (3) and the assembly plate (1). The connecting rope mechanism (4) is used to connect the assembly plate (1) and the extension frame mechanism (3). A winding mechanism (6) is mounted on the top of the extension frame mechanism (3), and the winding mechanism (6) is used to automatically wind up the connecting rope mechanism (4). Positioning mechanisms (5) are mounted on both sides of the connecting rope mechanism (4), and the positioning mechanisms (5) are used to position the connecting rope mechanism (4) in the winding mechanism (6). 4) After winding, the positioning and connecting rope mechanism (4) is used; the propeller (7) is fixed on both sides of the assembly plate (1), and the steering mechanism (8) is fixed on the bottom of the assembly plate (1). The steering mechanism (8) is used to turn the whole equipment; the buoyancy adjuster (9) is fixed on both sides of the top of the assembly plate (1). The buoyancy adjuster (9) is used to control the lifting height of the equipment. The extension frame mechanism (3) is provided with a fixing mechanism (10) on one side. The fixing mechanism (10) is used to fix the equipment and the hull.

2. The underwater acoustic equipment mounting bracket as described in claim 1, characterized in that, The assembly mechanism (2) includes: a fixed frame (201) fixed to the bottom of the assembly plate (1), the interior of the fixed frame (201) being used to insert and load acoustic detection equipment; and a pneumatic telescopic rod (202) fixed to the upper part of the interior of the fixed frame (201), the pneumatic telescopic rod (202) being used to press and fix the acoustic detection equipment loaded inside the fixed frame (201).

3. The underwater acoustic equipment mounting bracket as described in claim 2, characterized in that, The extension end of the pneumatic telescopic rod (202) is fixedly connected to an elastic pressing ball (203), which is made of anti-slip material. The pneumatic telescopic rod (202) is fixedly connected to both sides of the upper part of the fixed frame (201).

4. The underwater acoustic equipment mounting bracket as described in claim 3, characterized in that, The fixing frame (201) is located inside the assembly plate (1) and the bottom plate of the fixing frame (201) is concave.

5. The underwater acoustic equipment mounting bracket as described in claim 4, characterized in that, The extension frame mechanism (3) includes: a fixed cylinder (301) fixed to one side of the hull, and a fixing mechanism (10) is provided between the fixed cylinder (301) and the hull; a pneumatic telescopic rod II (302) fixed inside the fixed cylinder (301), and an extension rod (303) is fixedly connected to the extension end of the pneumatic telescopic rod II (302), and the extension rod (303) is inserted into the inside of the fixed cylinder (301).

6. The underwater acoustic equipment mounting bracket as described in claim 5, characterized in that, The connecting rope mechanism (4) includes: a slot (401) at the bottom of the extension rod (303), with a cross-shaped insert (404) fixedly connected inside the slot (401); a fixing block (405) fixed at the middle position of the top of the assembly plate (1), with a cross-shaped slot (406) inside the fixing block (405), and the cross-shaped insert (404) fitting into the cross-shaped slot (406); a wire rope (403) fixed at the top of the fixing block (405), with the top of the wire rope (403) inserted into the extension frame mechanism (3), and the top of the wire rope (403) fixed to the winding mechanism (6); and a telescopic hole (402) inside the extension rod (303), with telescopic holes (402) on both sides inside the extension rod (303), and the wire rope (403) inserted through the telescopic holes (402) on both sides.

7. The underwater acoustic equipment mounting bracket as described in claim 6, characterized in that, The positioning mechanism (5) includes: a second fixing block (502) fixed on both sides of the fixing cylinder (301), and an electric push rod (503) fixedly connected inside the second fixing block (502); and insertion holes (501) opened on both sides inside the first fixing block (405), the extension end of the electric push rod (503) being adapted to be inserted into the inside of the insertion hole (501).

8. The underwater acoustic equipment mounting bracket as described in claim 7, characterized in that, The winding mechanism (6) includes: a fixed frame (601) fixed to the top of the fixed cylinder (301); a motor (602) fixed to both sides of the fixed frame (601), the output end of the motor (602) is fixedly connected to a winding shaft (603), and the outer side of the winding shaft (603) winds a steel wire rope (403).

9. The underwater acoustic equipment mounting bracket as described in claim 8, characterized in that, The steering mechanism (8) includes a second motor (801) fixed to the bottom of the assembly plate (1), and a second propeller (802) is fixedly connected to the output end of the second motor (801).

10. The underwater acoustic equipment mounting bracket as described in claim 9, characterized in that, The fixing mechanism (10) includes: a fixing piece one (1001) fixed to one side of the fixing frame (601); a sleeve (1002) sleeved on the bottom of the outside of the fixing cylinder (301); and a fixing piece two (1003) fixed to one side of the sleeve (1002).

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