Delayed surface marker buoy and buoyant object

Abstract

A delayed surface marker buoy is disclosed. The delayed surface marker buoy according to the present invention comprises a tube that rises by buoyancy when gas is injected into the water, an air inlet installed in the tube that provides a passage for injecting the gas, and a buoyancy body that causes the tube to stand upright in the water before gas is injected into the tube.

Description

Technology Field

[0001] The present invention relates to a delayed surface marker buoy and a buoyancy body, wherein a buoyancy body is placed at the upper end of a tube to cause the tube to stand upright underwater even before gas is injected into the tube. Background Technology

[0002] Divers use Surface Marker Buoys (SMBs) to signal their location and protect themselves from vessels on the surface. Among these, a Surface Marker Buoy deployed underwater before ascending to the surface is called a Delayed Surface Marker Buoy (DSMB).

[0003] The method for deploying a Delayed Surface Marker Buoy (DSMB) underwater involves injecting gas into the buoy through the air inlet. However, calmly injecting gas into a DSMB is very difficult for novice divers in situations involving underwater environments such as darkness and currents, the management of numerous pieces of equipment to handle underwater, and physical exhaustion from prolonged dives.

[0004] Figure 1 is a diagram illustrating the state of a conventional DSMB in water.

[0005] Conventional delayed surface marker buoys (DSMBs) have a similar density overall, so they have a very free shape underwater. Divers must deploy the delayed surface marker buoy and then locate the air inlet to inject gas, but as illustrated in Fig. 1, there is considerable difficulty in locating the air inlet and injecting gas after deploying the delayed surface marker buoy when it is fluttering underwater.

[0006] For example, in situations where a delayed surface marker buoy fluttered in front of the diver's eyes like aquatic plants, obstructing their vision, or where the buoy was tossed about by the current, the diver had to use both hands to tidy up the tube, locate the air inlet, bring it to their mouth, and inject gas. Due to the difficulty of these operations, problems arose where divers were unable to perform necessary actions or struggled to continuously monitor the depth gauge (computer) worn on their wrists; there were even frequent dangerous situations where the line between the reel (spool) and the DSMB became tangled. Consequently, novice divers found the use of delayed surface marker buoys difficult or even gave up on using them altogether. The problem to be solved

[0007] The present invention was devised to solve the aforementioned problems, and the objective of the present invention is to provide a delayed surface marker buoy and a buoyancy body that allow the tube to stand upright underwater even before gas is injected into the tube by placing a buoyancy body at the upper end of the tube. means of solving the problem

[0008] A delayed water level marker buoy according to the present invention comprises a tube that rises by buoyancy when gas is injected into the water, an air inlet installed in the tube that provides a passage for injecting the gas, and a buoyancy body that causes the tube to stand upright in the water before gas is injected into the tube.

[0009] In this case, the buoyancy body is positioned at the top of the tube, and the density of the buoyancy body may be lower than the density of the tube before the gas is injected.

[0010] In this case, the air inlet may be formed at a position closer to the lower end of the tube than to the upper end of the tube.

[0011] Meanwhile, the above-mentioned buoyancy body can maintain the same volume underwater.

[0012] Meanwhile, the tube is further included with a fixing band that wraps around the tube to maintain the roll-shaped structure while the tube is wound in a roll-shaped structure, and the tube wound in the roll-shaped structure can unfold upward as the buoyancy body rises when the fixing band is released.

[0013] In this case, the buoyancy body may have the shape of a cylinder or an elliptical cylinder and may be embedded in the upper part such that the longitudinal direction of the buoyancy body coincides with the width direction of the tube.

[0014] Meanwhile, the above buoyancy body may be a detachable buoyancy body connected to the upper part.

[0015] Meanwhile, the buoyancy body according to the present invention comprises a buoyancy body having a lower density than that of a delayed surface marker buoy before gas is injected, and a connecting structure that connects the buoyancy body to the upper end of the delayed surface marker buoy so that the delayed surface marker buoy stands upright underwater by the buoyancy body before gas is injected into the delayed surface marker buoy.

[0016] In this case, the above-mentioned connecting structure may include a groove formed along the longitudinal direction of the buoyancy body and into which the connecting part of the delayed water surface marker buoy is inserted.

[0017] Meanwhile, the above-mentioned connecting structure may include a loop through which a string connected to the buoyancy body and connected to the delayed surface marker buoy passes. Brief explanation of the drawing

[0018] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. Figure 1 is a drawing illustrating the underwater state of a conventional delayed surface marker buoy. FIG. 2 is a front view of a delayed water surface marker buoy according to the present invention. Figure 3 is an enlarged view of the upper part of the delayed water surface marker buoy. FIG. 4 is a drawing illustrating a delayed underwater marker buoy before unfolding according to the present invention. FIG. 5 is a diagram illustrating a structure in which a separable buoyancy body according to the first embodiment of the present invention is connected to a tube. FIG. 6 is a diagram illustrating a structure in which a separable buoyancy body according to a second embodiment of the present invention is connected to a tube. Figure 7 is a diagram illustrating the situation in which a delayed water surface marker buoy unfolds upward in sequence. Figure 8 is a diagram illustrating the situation where all delayed water surface marker buoys are deployed. Fig. 9 illustrates a situation where a diver is holding a tube with one hand. Specific details for implementing the invention

[0019] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings to clarify solutions to the technical problems of the present invention. However, in describing the present invention, if a description of related prior art would obscure the essence of the present invention, such description will be omitted. Furthermore, terms used in this specification are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of designers, manufacturers, etc. Therefore, the definitions of terms described below should be based on the content throughout this specification.

[0020] In the drawings, the size of each component or specific part constituting the component is exaggerated, omitted, or schematically depicted for the convenience and clarity of explanation. Accordingly, the size of each component does not entirely reflect its actual size. If it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the present invention, such description shall be omitted.

[0021] Meanwhile, terms such as 'combination,' 'connection,' 'mounting,' and 'fixing' as used in this specification include not only cases where one member is directly combined, connected, mounted, or fixed to another member, but also cases where one member is indirectly combined, connected, mounted, or fixed to another member through an intermediate member.

[0022] In addition, terms indicating directions such as front, back, left, right, up, and down described in this specification may vary depending on the observer's position or the arrangement of the object. However, for the sake of convenience of explanation, in this specification, the negative and positive directions in the X-axis direction of the drawings are designated as the front-back direction, the negative and positive directions in the Y-axis direction are designated as the left-right direction, and the positive and negative directions in the Z-axis direction are designated as the up-down direction, respectively, to indicate directions such as front, back, left, right, up, and down.

[0023] FIG. 2 is a front view of a delayed water level marker buoy according to the present invention, and FIG. 3 is an enlarged view of the upper part of the delayed water level marker buoy.

[0024] The delayed water level marker buoy (10) may include a tube (100). The tube (100) may have the shape of a flat rod (or long plate) when no gas is injected, and may swell up to have the shape of a cylinder or an elliptical cylinder when gas is injected.

[0025] The tube (100) can rise by buoyancy when gas is injected into it underwater.

[0026] Specifically, an internal space is formed inside the tube (100), and this internal space can be filled with gas. The density of the delayed surface marker buoy (10) is similar to that of water (including seawater), so it has neutral buoyancy before gas is injected, but when gas is injected into the internal space of the tube (100), the density of the delayed surface marker buoy (10) becomes lower than that of water, allowing it to rise to the surface.

[0027] The diver can deploy a delayed surface marker buoy underwater by injecting gas into the tube (100) before surfacing.

[0028] The delayed surface marker buoy (10) may include an air inlet (120). The air inlet (120) may be installed in the tube (100) to provide a passage through which gas is injected. Specifically, the air inlet (120) may be formed in the circumferential wall of the tube (100) (a wall formed along the circumference of a cylinder (or elliptical cylinder) that separates the outside from the inside space of the tube) to provide a passage connecting the inside space of the tube (100) to the outside.

[0029] The diver may inject gas into the tube (100) manually (i.e., by the diver biting the air inlet (120) with their mouth and blowing gas into it), but is not limited thereto, and gas may also be injected into the tube (100) by connecting the air inlet (120) to an air breathing apparatus or a separate gas cylinder. The term “gas” in this specification may include a mixed gas such as air or a single gas.

[0030] The air inlet (120) can be formed to protrude a certain length from the tube (100) so that the diver can inject gas directly into the mouth.

[0031] Meanwhile, in FIG. 2, the air inlet (120) is shown as being formed protruding from the circumferential wall of the tube (100), but is not limited thereto. As an example, the air inlet may be formed in the form of an opening at the bottom of the tube. When the air inlet is formed in the form of an opening, gas may be injected into the tube (100) by the bubble exhaled by the diver or by the free flow of the backup regulator.

[0032] In another embodiment, a plurality of air inlets may be formed in the tube. For example, the tube (100) may include a first air inlet protruding from the circumferential wall of the tube (100) and a second air inlet formed in the form of an opening at the bottom of the tube.

[0033] That is, the present invention can be applied to closed DSMBs, open DSMBs, and semi-closed DSMBs.

[0034] The delayed surface marker buoy (10) may include an air outlet (110). The air outlet (110) is formed on the circumferential wall of the tube (100) and can discharge gas filled in the internal space of the tube (100) to the outside.

[0035] A lower ring (130) may be connected to the lower end of the tube (100). A reel (300) may be connected to the lower ring (130). Once the delayed surface marker buoy (10) rises, the diver can rise to the surface by winding the line connected between the reel (300) and the tube (100).

[0036] Additionally, a fixing band (180 in FIG. 4) may be connected to the lower ring (130), and the delayed water level marker buoy (10) may maintain a wound (or folded) shape by the fixing band (180 in FIG. 4).

[0037] A marking line (150) to improve identification can be formed on the outer surface of the tube (100). Additionally, an upper ring (141) can be connected to the upper end of the tube (100).

[0038] The delayed surface marker buoy (10) may include a buoyancy body (200). The buoyancy body (200) may be placed on the upper part (140) of the tube (100). Here, the upper part (140) of the tube (100) is a part including the upper end of the tube (100), and may mean, for example, the upper part of the marking line (150), but is not limited thereto.

[0039] Additionally, the placement of the buoyancy body (200) on the upper portion (140) of the tube (100) may include the buoyancy body (200) being embedded in the upper portion (140) or the buoyancy body (200) being directly or indirectly connected to the upper portion (140). FIGS. 2 and 3 illustrate an embodiment in which the buoyancy body (200) is embedded in the upper portion (140).

[0040] In the upper part (140) of the tube (100), a separate internal space is formed that is separated from the internal space (space into which gas is injected), and a buoyancy body (200) may be embedded in the internal space. However, this is not limited thereto, and the internal space (space into which gas is injected) of the tube (100) described above may be extended to the upper part (140), and the buoyancy body (200) may be fixed to one area of ​​the internal space by a fixing means.

[0041] The buoyancy body (200) can cause the tube (100) to stand upright underwater before gas is injected into the tube (100).

[0042] Specifically, the density of the buoyancy body (200) may be lower than the density of the tube (100) before gas is injected (more specifically, the average density of the tube (100), the air outlet (110), and the air inlet (120). Additionally, as previously explained, the density of the tube (100) is similar to the density of water (including seawater), so the density of the buoyancy body (200) may be lower than the density of water (including seawater). Accordingly, positive buoyancy (a force that causes an object to float) acts on the upper part of the tube (100), while neutral buoyancy (a force that causes an object to neither float nor sink) acts on the remaining part of the tube (100).

[0043] Accordingly, the tube (100) can stand upright underwater. Specifically, the upper part of the tube (100) can face upward (toward the water surface) and the lower part of the tube (100) can face downward (toward the seabed). In this case, the tube (100) can be positioned vertically underwater.

[0044] Meanwhile, the density of the buoyancy body (200) is lower than the density of the tube (100), whereas the volume of the buoyancy body (200) may be smaller than the volume of the tube (100). Specifically, the length (L in FIG. 5) of the buoyancy body (200) is smaller than or equal to the width (W in FIG. 5) of the tube (100), and the diameter of the buoyancy body (200) may be smaller than the length of the buoyancy body (200). That is, while it is possible for the buoyancy body (200) to apply positive buoyancy to the upper part of the delayed surface marker buoy (100) to make the delayed surface marker buoy (10) stand upright, the positive buoyancy generated by the buoyancy body (200) is relatively insufficient to raise the entire delayed surface marker buoy (10), so the delayed surface marker buoy (10) does not rise to the surface despite the presence of the buoyancy body (200). That is, the surface marker buoy (10) delayed by the buoyancy body (200) stands upright underwater, but the surface marker buoy (10) delayed by the buoyancy body (20) does not rise to the surface (or rises to the surface very slowly to a negligible level), and can only rise to the surface when the diver injects air into the air inlet (120).

[0045] Meanwhile, the air inlet (120) may be formed at a position closer to the lower end of the tube (100) than to the upper end of the tube (100).

[0046] Specifically, as previously described, the buoyancy body (200) is positioned at the upper end (140) of the tube (100), and thus the buoyancy body (200) is closer to the upper end of the tube (100) than to the lower end of the tube (100). On the other hand, the air inlet (120) may be closer to the lower end of the tube (100) than to the upper end of the tube (100). That is, the air inlet (120) may be positioned in the opposite direction of the buoyancy body (200).

[0047] When a diver deploys a delayed surface marker buoy (10) around the chest or face, the positive buoyancy generated by the buoyancy body (200) is relatively insufficient to raise the entire delayed surface marker buoy (10), so the position of the lower end of the tube (100) does not change significantly, while the upper end of the tube (100) rises and the tube (100) is deployed. That is, when the tube (100) is deployed, the air inlet (120) (the air inlet (120) closer to the lower end of the tube (100)) is located close to the diver's face, so the diver can easily find the air inlet (120) and bring it to their mouth.

[0048] Additionally, assuming a situation where a diver holds the lower end (or lower ring (130)) of the tube (10) with their hand and unfolds the delayed surface marker buoy (10), the upper end of the tube (100) rises while the lower end of the tube (100) is held in the hand, causing the tube (100) to unfold. That is, since the lower end of the tube (100) is held in the diver's hand while the tube (100) is unfolded, the diver can easily bring the air inlet (120) located near the lower end of the tube (100) to their mouth.

[0049] Meanwhile, the buoyancy body (200) can maintain the same volume underwater. Here, underwater means the normal depth at which a human can dive with their body exposed.

[0050] Specifically, the depth at which a diver deploys the delayed surface marker buoy (10) may vary depending on the situation, and if the buoyancy changes according to the changing depth, problems may occur such as the tube (100) not standing upright or the speed at which it stands upright becoming very slow. Therefore, even when moving from outside the water to underwater, the buoyancy body (200) can maintain the same volume even if the depth is different. Accordingly, as the depth increases, the problem of the buoyancy body (200) becoming smaller and the buoyancy decreasing together can be prevented.

[0051] In order for the buoyancy body (200) to maintain the same volume underwater, a plastic material (specifically PVC plastic) may be used as the buoyancy body (200), and a material whose volume changes depending on the depth of water, such as styrofoam or sponge, may not be used as the buoyancy body (200).

[0052] FIG. 4 is a drawing illustrating a delayed underwater marker buoy before unfolding according to the present invention.

[0053] For ease of carrying, the tube (100) can be wound into a roll-type structure. Specifically, the diver can roll up the tube (100) from the upper end, and accordingly, the buoyancy body (200) can be positioned at the innermost part of the roll-type structure.

[0054] The buoyancy body (200) may have the shape of a cylinder or an elliptical cylinder. Accordingly, the side of the buoyancy body (200) may be formed as a curved surface. Additionally, the buoyancy body (200) may be embedded in the upper part (140) such that the longitudinal direction (L in FIG. 5) of the buoyancy body (200) aligns with the width direction (W in FIG. 5) of the tube (100). That is, as the side of the buoyancy body (200) is formed as a curved surface, the tube (100) can be easily wound into a roll-shaped structure while the buoyancy body (200) is placed inside, and the size of the roll-shaped structure can be reduced after the tube is fully wound.

[0055] The upper and lower surfaces of the buoyancy body (200) may be flat, but are not limited thereto, and may have rounded surfaces.

[0056] The delayed water level marker buoy (10) may further include a fixing band (180) that wraps around the tube (100) to maintain the roll-shaped structure while the tube (100) is wound in a roll-shaped structure.

[0057] Meanwhile, the fixed band (180) can be released. Specifically, a one-touch release device (e.g., the buckle (181) of FIG. 4) may be connected to the fixed band (180) so that a diver can easily release the fixed band (180) underwater. However, it is not limited to this, and the fixed band (180) may be made of rubber so that the fixed band (180) can be released by peeling the fixed band (180) sideways in a roll-shaped structure.

[0058] When the fixing band (180) is released, the tube (100) can stand upright underwater. Specifically, when the fixing band (180) is released, the tube (100), which is wound in a roll-like structure, can be unfolded upwards as the buoyancy body (200) rises. This will be explained with reference to FIGS. 7 and FIGS. 8.

[0059] FIG. 7 is a diagram illustrating the situation in which a delayed surface marker buoy is unfolded upward in sequence, and FIG. 8 is a diagram illustrating the situation in which the delayed surface marker buoy is fully unfolded. FIG. 9 illustrates the situation in which a diver is holding a tube with one hand.

[0060] FIG. 7a illustrates a situation in which a diver attempts to release the fixing band (180). When the fixing band (180) is released by the diver, the tube (100) unfolds upward as the buoyancy body (200) with positive buoyancy rises, and the sight of the tube (100) unfolding upward is illustrated in FIG. 7b, FIG. 7c, and FIG. 7d in order. While the rolled tube is unfolding, the force pulling the upper part (140) of the tube from below is small, so the rolled tube (100) can unfold smoothly as the upper part (140) rises. The upper part (140) can rise until the tube (100) is fully unfolded.

[0061] Finally, as illustrated in FIG. 8, the tube (100) stands upright underwater as it is fully unfolded. Also, when the tube (100) is fully unfolded, the upper part (140) (lower density part) is pulled from below by the remaining part (higher density part) excluding the upper part (140), so the delayed surface marker buoy (10) may not rise any further. Additionally, the air inlet (120), located close to the lower end of the tube (100), is positioned near the diver's face. Thus, the diver can easily inject gas into the tube (100).

[0062] When comparing the prior art of FIG. 1 with the present invention of FIG. 8 and FIG. 9, the effects of the present invention are more clearly evident.

[0063] In the prior art of FIG. 1, the diver must inject gas after unfolding the tube, but the tube flutters in front of the eyes, making it difficult to find where the end of the tube is and where the air inlet is. However, in the present invention, the tube (100) automatically unfolds vertically, thereby helping the diver secure a clear view.

[0064] In addition, in the prior art of FIG. 1, the diver must hold the tube with their hand to unfold it, but situations arise where it is difficult to hold the tube when it flutters due to the water current, and situations also frequently occur where the diver loses the reel (300) or the tube held in their hand while trying to hold both ends of the tube with two hands. However, referring to FIG. 9, in the present invention, the tube unfolds automatically when the diver holds the lower part or lower ring of the tube (100) with one hand. Therefore, the operation of the diver unfolding the delayed surface marker buoy can be made very easy.

[0065] In addition, the conventional technology of FIG. 1 had a problem in that it was very difficult for a diver to locate the air inlet and bring it to their mouth. However, according to the present invention, even after the delayed surface marker buoy (10) is deployed, the air inlet is located around the face, so that the diver can be made to locate the air inlet and bring it to their mouth very easily.

[0066] Meanwhile, it was previously explained that the buoyancy body (200) is embedded in the tube (100). However, it is not limited thereto, and the buoyancy body (200) may be a detachable buoyancy body connected to the upper part (140) of the tube (100). This will be explained with reference to FIGS. 5 and 6.

[0067] FIG. 5 is a diagram illustrating a structure in which a separable buoyancy body according to the first embodiment of the present invention is connected to a tube.

[0068] The buoyancy body (200') may be a buoyancy body separated from the delayed surface marker buoy. A diver may use the separated buoyancy body (200') by connecting it to the delayed surface marker buoy (100).

[0069] The buoyancy body (200') may include a buoyancy body body (210) and a connecting structure in the shape of a groove (220).

[0070] The preceding description of the buoyancy body (200) may be applied to the buoyancy body (210) to the extent that it is not contradictory. Thus, the buoyancy body (210) may have a lower density than the delayed surface marker buoy before gas is injected. Additionally, the buoyancy body (210), for example made of PVC plastic, may maintain the same volume underwater.

[0071] Additionally, the buoyancy body (210) can be connected to the upper part (140) such that the longitudinal direction (L) of the buoyancy body (210) matches the width direction (W) of the tube (100).

[0072] Specifically, a groove (220) may be formed along the longitudinal direction (L) of the buoyancy body (210) on the side of the buoyancy body (210).

[0073] Additionally, the tube (100) may include a connecting portion (170) including an upper end (510) of the tube (100), and the connecting portion (170) may be inserted into a groove (220) formed in the buoyancy body (210).

[0074] Additionally, the buoyancy body (200') may include a fastening part (221, 222) that secures the connecting part (170) of the tube (100) within the groove (220). For example, one or more bolts (221, 222) may be screwed into the buoyancy body (210) along the threads formed in the fastening holes (241, 242) of the buoyancy body (210). Accordingly, vertical pressure is applied to the groove (220), and the connecting part (170) can be firmly secured by receiving vertical pressure within the groove (220).

[0075] Additionally, the buoyancy body (210) may have the shape of a cylinder or an elliptical cylinder and may be connected to the upper end of the tube (100) such that the longitudinal direction (L) of the buoyancy body (210) aligns with the width direction (W) of the tube (100). Accordingly, even when the buoyancy body (210) is connected to the tube (100), the tube (100) can be easily wound into a roll-shaped structure, and the size of the roll-shaped structure can be reduced.

[0076] FIG. 6 is a diagram illustrating a structure in which a separable buoyancy body according to a second embodiment of the present invention is connected to a tube.

[0077] The buoyancy body (200') may be a buoyancy body separated from the delayed surface marker buoy. A diver may use the separated buoyancy body (200') by connecting it to the delayed surface marker buoy (100).

[0078] The above description of the buoyancy body (200) can be applied to the buoyancy body (210) to the extent that it is not contradictory.

[0079] The buoyancy body (200') may include a buoyancy body body (210) and a connecting structure in the shape of a ring (230). Specifically, a ring (230) may be connected to the lower part of the buoyancy body body (210), for example.

[0080] A string (600) connected to a delayed water surface marker buoy can pass through a loop (230). Specifically, the string (600) can be fastened by passing through the upper loop (141) of the upper end (510) of the tube (100) and the loop (230) of the buoyancy body (210). Accordingly, the upper part (140) of the tube (100) and the buoyancy body (200') can be indirectly connected.

[0081] The string (600) can be made of a flexible material. Accordingly, the length direction (L) of the buoyancy body (210) can be positioned to match the width direction (W) of the tube (100), and in this state, a diver or manufacturer can place the buoyancy body (210) inside and roll up the tube (100) to form a roll-shaped structure. Since the buoyancy body (210) can have the shape of a cylinder or an elliptical cylinder, the tube (100) can be easily rolled up into a roll-shaped structure, and the size of the roll-shaped structure can be reduced.

[0082] When the tube (100) is wound in a roll-shaped structure, the longitudinal direction (L) of the buoyancy body (210) coincides with the width direction (W) of the tube (100), but when the fixing band (180) is released and the tube (100) is unfolded, the buoyancy body (210) can stand upright in a vertical direction as shown in FIG. 6.

[0083] Meanwhile, the description of the detachable buoyancy body (200') in FIGS. 5 and FIGS. 6 is merely an example, and the detachable buoyancy body (200') can be connected directly or indirectly to the upper part of the delayed water surface marker buoy in various ways.

[0084] The detachable buoyancy body (200') can cause the tube (100) to stand upright underwater before gas is injected into the tube (100).

[0085] Specifically, the density of the separable buoyancy body (200') may be lower than the density of the tube (100) before gas is injected. Accordingly, positive buoyancy (a force that causes an object to float) acts on the upper part (140) connected to the separable buoyancy body (200'), while neutral buoyancy (a force that causes an object to neither float nor sink) acts on the remaining part of the tube (100).

[0086] Accordingly, the tube (100) can stand upright underwater. Specifically, the upper part of the tube (100) can face upward (toward the water surface) and the lower part of the tube (100) can face downward (toward the seabed). In this case, the tube (100) can be positioned vertically underwater.

[0087] Additionally, although it is possible to apply positive buoyancy to the upper part (140) of the delayed surface marker buoy (100) using a detachable buoyancy body (200') to raise the delayed surface marker buoy (10), the positive buoyancy generated by the buoyancy body (200) is relatively insufficient to raise the entire delayed surface marker buoy (10). Therefore, the delayed surface marker buoy (10) does not rise to the surface despite the presence of the buoyancy body (200). In other words, the diver can only rise to the surface by injecting air into the air inlet (120).

[0088] When using a detachable buoyancy body (200'), the effects of the present invention can be achieved by additionally connecting the detachable buoyancy body (200') while using the delayed surface marker buoy according to the prior art as is. Accordingly, there is an advantage in that compatibility and versatility with the conventional delayed surface marker buoy can be secured.

[0089] The embodiments disclosed above should be considered in an illustrative rather than a limiting sense. That is, the true scope of the technical concept of the invention is set forth in the claims, and all variations within the scope of equivalents should be interpreted as being included in the invention. Explanation of the symbols

[0091] 10: Delayed sleep marker buoy 100: Tube 110: Air outlet 120: Air inlet 130: Lower hook 140: Top part 141: Upper loop 150: Mark line 170: Connection part 180: Fixing band 181: Buckle 200: Buoyancy device 200': Separable buoyancy device 210: Buoyancy body main body 220: Home 221, 222: Fastening parts 241, 242: Fastening holes 230: Loop 300: Reel 600: String

Claims

Claim 1 A delayed surface marker buoy comprising: a tube that rises by buoyancy when gas is injected into it underwater; an air inlet installed in the tube to provide a passage for injecting the gas; and a buoyancy body built into or connected to the upper end of the tube to cause the tube to stand upright underwater before gas is injected into the tube. Claim 2 In claim 1, the buoyancy body is positioned at the upper end of the tube, and the density of the buoyancy body is a delayed surface marker buoy lower than the density of the tube before the gas is injected. Claim 3 In claim 2, the air inlet is a delayed water level marker buoy formed at a position closer to the lower end of the tube than to the upper end of the tube. Claim 4 In claim 1, the buoyancy body is a delayed surface marker buoy that maintains the same volume underwater. Claim 5 In claim 2, further comprising a fixing band that wraps around the tube while the tube is wound in a roll-shaped structure to maintain the roll-shaped structure; and the tube wound in the roll-shaped structure unfolds upward as the buoyancy body rises when the fixing band is released, a delayed surface marker buoy. Claim 6 In claim 5, the buoyancy body has the shape of a cylinder or an elliptical cylinder, and a delayed surface marker buoy is embedded in the upper part such that the longitudinal direction of the buoyancy body coincides with the width direction of the tube. Claim 7 In Clause 2, the buoyancy body is a detachable buoyancy body delayed surface marker buoy connected to the upper part. Claim 8 A buoyancy body comprising: a buoyancy body having a lower density than a delayed surface marker buoy before gas is injected; and a connecting structure connecting the buoyancy body to the upper end of the delayed surface marker buoy so that the delayed surface marker buoy stands upright underwater by the buoyancy body before gas is injected into the tube of the delayed surface marker buoy. Claim 9 In claim 8, the above-mentioned connecting structure comprises a groove formed along the longitudinal direction of the buoyancy body body and into which the connecting portion of the delayed surface marker buoy is inserted. Claim 10 In claim 8, the above connecting structure comprises a loop through which a string connected to the buoyancy body body and connected to the delayed surface marker buoy passes.

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