Belt system for buoyancy aid and buoyancy aid with belt system

Abstract

A belt system (102) for a buoyancy aid (100) is proposed. The belt system (102) comprises a belt (104) designed to be worn around a person's torso, two side fastening elements (110) each designed to releasably fasten a buoyancy body (112), wherein the side fastening elements (110) are arranged at two side positions (114) on the belt (104) such that the side fastening elements (110) are located laterally on the back of the person wearing the belt when the belt (104) is worn, and a back fastening element (122) designed to releasably fasten a buoyancy body (112), wherein the back fastening element (122) is arranged at a central position on the belt (104) between the side fastening elements (110) such that the back fastening element (122) is located centrally on the back of the person wearing the belt when the belt (104) is worn.wherein the belt (104) is designed for selectively attaching two buoyancy bodies (112) to the side fastening elements (110) or one buoyancy body (112) to the back fastening element (122). Furthermore, a buoyancy aid (100) with a belt system (102) is proposed.

Description

Technical area

[0001] The present invention relates to a belt system for a swimming aid and a swimming aid with a belt system. Technical background

[0002] For people, especially children, a buoyancy aid is ideal for learning to swim. Models with the option to adjust buoyancy are also useful. This initially utilizes the overall buoyancy to provide a sense of security, to familiarize themselves with the water, and to practice swimming strokes. As the child progresses, the buoyancy can be reduced by reducing the volume of the buoyancy aid, thus transitioning to free swimming.

[0003] The buoyancy aids primarily used to attach to the body are those made of foil with air chambers. The widely used "water wings," worn on the upper arm, deserve a mention in this context. While these designs provide support in the water, they severely restrict unhindered movement.

[0004] Known swimming aids which are put on with belts only have buoyancy elements on the back and sides, as can be seen from DE 200 05 183 U1 and DE 32 399 29 C2.

[0005] DE 10 2004 014 891 B4 discloses a lightweight, flexible buoyancy aid with a buoyancy aid and shoulder strap system that can be precisely adjusted to the body across a range of sizes. In addition to a buoyancy aid on the back, a buoyancy aid can be attached to the chest. The chest buoyancy aid is attached to the shoulder strap closure in the chest area, thus further locking the shoulder strap as a complete system and preventing accidental opening.

[0006] Despite the numerous advantages of state-of-the-art buoyancy aids and harness systems, they still have room for improvement. For example, the aforementioned buoyancy aids have limited adjustability across different body sizes and can only provide appropriate buoyancy and comfort for each of these body sizes. Accordingly, more than one buoyancy aid is required to accommodate different age and height groups. Object of the invention

[0007] It would therefore be desirable to provide a harness system for a buoyancy aid and a buoyancy aid that at least largely avoids the disadvantages of known harness systems and buoyancy aids. In particular, a harness system and a buoyancy aid should be provided that can be converted and used for babies from approximately 10 months to children up to approximately 12 years of age. Accordingly, a single required buoyancy aid should be provided that "grows" across multiple ages and body sizes. General description of the invention

[0008] This problem is addressed by a belt system and a buoyancy aid having the features of the independent patent claims. Advantageous further developments, which can be implemented individually or in any combination, are presented in the dependent claims.

[0009] In the following, the terms "have", "have", "comprise", or "include", or any grammatical variations thereof, are used non-exclusively. Accordingly, these terms can refer both to situations in which, apart from the features introduced by these terms, no further features are present, or to situations in which one or more further features are present. For example, the expression "A has B", "A has B", "A comprises B", or "A includes B" can refer both to the situation in which, apart from B, no further element is present in A (i.e., a situation in which A consists exclusively of B), and to the situation in which, in addition to B, one or more further elements are present in A, for example, element C, elements C and D, or even further elements.

[0010] Furthermore, it should be noted that the terms "at least one" and "one or more," as well as grammatical variations of these terms, when used in connection with one or more elements or features and intended to express that the element or feature may be provided singly or multiple times, are generally used only once, for example, when the feature or element is first introduced. When the feature or element is subsequently mentioned again, the corresponding term "at least one" or "one or more" is generally no longer used, without limiting the possibility that the feature or element may be provided singly or multiple times.

[0011] Furthermore, the terms “preferably”, “in particular”, “for example” or similar terms are used hereinafter in connection with optional features, without limiting alternative embodiments. Thus, features introduced by these terms are optional features, and these features are not intended to limit the scope of the claims, and in particular the independent claims. Thus, as those skilled in the art will recognize, the invention can also be carried out using other embodiments. Similarly, features introduced by “in one embodiment of the invention” or by “in an embodiment of the invention” are understood as optional features, without limiting alternative embodiments or the scope of the independent claims.Furthermore, these introductory expressions are intended to leave untouched all possibilities of combining the features introduced thereby with other features, whether optional or non-optional.

[0012] In a first aspect of the present invention, a belt system for a swimming aid is proposed.

[0013] The term "harness system," as used herein, is a broad term that should be given its ordinary and common meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. The term may refer, without limitation, to a system including a belt, a buckle by means of which the belt can be locked, and fasteners for attaching buoyancy aids.

[0014] The term "flotation device," as used herein, is a broad term to be given its ordinary and customary meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. The term can refer, without limitation, to a device designed to assist in reducing the effort required for swimming. Floatation devices are used by swimmers or novice swimmers to stay afloat or to learn certain swimming techniques. In particular, floatation devices have buoyancy aids to assist swimming by providing buoyancy.

[0015] The harness system includes a belt designed to be worn around a person's torso. This allows the belt to be worn around the torso for swimming without hindering swimming movements. To prevent accidental release of the belt, it can have a closure, for example, a buckle or a buckle.

[0016] The harness system further comprises two side fastening elements, each designed for releasably attaching a buoyancy aid. The side fastening elements are arranged at two lateral positions on the harness such that, when the harness is worn, the side fastening elements are located on the side of the wearer's back.

[0017] The term "lateral attachment element," as used herein, is a broad term and should be given its ordinary and customary meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. The term may refer, without limitation, specifically to an attachment element that, when the harness or harness system is worn, is laterally offset from a center of the torso and adjacent to one side of the back. In other words, the side attachment element is located dorsolaterally when worn and is therefore referred to as such.

[0018] The arrangement of the side fastening elements is understood to be a fixed arrangement relative to the belt, particularly one specified by the manufacturer, and thus non-adjustable. The position of the side fastening element relative to the belt is therefore not changeable.

[0019] The term "buoyancy device" as used herein is a broad term, which should be given its ordinary and customary meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. The term can refer, without limitation, in particular to a body or object with a density lower than water at 20°C, which thus exerts a buoyancy force when floating.

[0020] The harness system further comprises a back fastening element designed for releasably attaching a buoyancy body. The back fastening element is arranged at a central position on the belt between the side fastening elements such that, when the belt is worn, the back fastening element is located centrally on the wearer's back.

[0021] The term "back attachment element," as used herein, is a broad term and should be given its ordinary and customary meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. The term may, without limitation, specifically refer to an attachment element that, when the harness or harness system is worn, overlaps a center of the torso and is adjacent to the center of the back. In other words, the side attachment element is located dorsomedial when worn and is therefore so designated.

[0022] The arrangement of the back fastening element is understood to be a fixed arrangement relative to the belt, particularly one specified by the manufacturer, and thus non-adjustable. The position of the back fastening element relative to the belt is therefore not changeable.

[0023] The harness is designed to optionally attach two buoyancy aids to the side attachment elements or one buoyancy aid to the back attachment element. In other words, the harness system is designed so that either two buoyancy aids can be attached to the side attachment elements or one buoyancy aid can be attached to the back attachment element.

[0024] The belt system according to the invention thus allows either two buoyancy aids to be attached at the sides or one buoyancy aid in a central position. The belt system can thus be flexibly adapted to the age of the wearer and their swimming ability. Only one product needs to be purchased for different age groups and swimming abilities, which improves sustainability. It also increases consistency for children. Confidence is important for children, which is increased when they are already familiar with their buoyancy aid. Furthermore, there is cost savings because only one product needs to be purchased up to the age of approximately 12. This increases simplicity, as there is no need to worry about buying a new buoyancy aid.

[0025] The strap can be elastic. This increases comfort, as the strap adapts better to the wearer's body shape than a rigid strap.

[0026] The side fastening elements and the back fastening element can be fixedly attached to the belt. In other words, the side fastening elements and the back fastening element are immobile relative to the belt. This ensures that the attachment positions for the buoyancy aids are firmly defined, preventing accidental displacement or adjustment of the buoyancy aids. The exact position for the fixed arrangement of the side fastening elements and the back fastening element is defined by the manufacturer and cannot be changed by the user.

[0027] The side fastening elements and / or the back fastening element can have a tab, a buckle, a tensioning device, and / or a clip for clamping and / or clipping in the buoyancy aids. This allows various types of buoyancy aids to be easily attached to the belt.

[0028] The side fastening elements and / or the back fastening element can have a strap section. The strap section can be designed to pass through an opening in the buoyancy aid for securing the buoyancy aid. The opening can, in particular, be a central or centered opening. This allows the buoyancy aids to be easily threaded through for securing. For example, swimming sleeves can be secured through their opening for the arms using the strap section.

[0029] The buoyancy aids can be designed as swim sleeves, allowing for the attachment of standard swim sleeves.

[0030] The side fastening elements and the back fastening element can each be designed for the releasable attachment of a two-chamber buoyancy aid. Such buoyancy aids have the advantage that their buoyancy force can be adjusted. For example, two-chamber buoyancy aids with a solid inner filling always provide buoyancy, even if an outer air chamber accidentally leaks air, for example, due to a defect. Such buoyancy aids are therefore particularly safe.

[0031] The term "dual-chamber buoyancy device" as used herein is a broad term that should be given its ordinary and common meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. The term may, without limitation, refer in particular to a buoyancy device having two separate or independent chambers configured to exert a buoyancy force.

[0032] The free length of the belt, which can be arranged around the person's torso, can be variable. The free length of the belt, which can be arranged around the person's torso, can, in particular, be continuously variable. This allows the belt and its length to be flexibly adjusted to different body sizes.

[0033] The term "free length of the belt," as used herein, is a broad term to be given its ordinary and customary meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. The term may, without limitation, refer in particular to a length of a portion of the belt that is looped around and fastened to the torso of the wearer. The free length thus essentially corresponds to a circumference of the torso of the wearer.

[0034] In a further aspect of the present invention, a swimming aid is proposed. The swimming aid comprises two buoyancy aids and a belt system according to one of the embodiments described above or below. This provides a buoyancy aid that "grows with the child," as it can be used in three positions or functional states. Depending on the child's age or swimming ability, the buoyancy aids can be used alone in the form of, for example, swimming sleeves, the buoyancy aid with two buoyancy aids in lateral positions, or the buoyancy aid with a single buoyancy aid in the middle or central position.

[0035] The buoyancy aids can be designed as swimming sleeves, allowing familiar swimming sleeves to be attached or used.

[0036] The buoyancy bodies can be designed as two-chamber buoyancy bodies. Such buoyancy bodies have the advantage that their buoyancy force can be adjusted. For example, two-chamber buoyancy bodies with an internal solid filling always provide buoyancy force, even if an outer air chamber accidentally leaks air, for example, due to a defect.

[0037] The dual-chamber buoyancy aids can have an inner chamber filled with a closed-cell foam and an outer chamber surrounding the inner chamber, which can be filled with a gas, especially air. Such buoyancy aids are therefore particularly safe.

[0038] The term "foam," as used here, is a broad term to which its usual and common meaning should be given, as understood by a person skilled in the art. The term is not limited to a specific or adapted meaning. The term can, without limitation, refer in particular to a man-made material with a cellular (or cellular) structure. The individual cells are hollow and usually filled with air, so foams are lightweight. They have a low density. Almost all plastics are suitable for their production (foaming). Foams can be compressed, i.e., their volume can be significantly reduced through pressure. Due to their internal structure, foam components are almost free of residual stress. Examples of foams are thermoplastic foams (e.g., PS-E, PP-E, and PVC-E), elastomer foams (e.g., flexible PUR foam, NBR), or thermosetting foams (e.g., rigid PUR foam, PF).

[0039] The term "closed-cell foam," as used herein, is a broad term that should be given its ordinary and customary meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. The term can refer, without limitation, in particular to a foam whose cell walls are closed and therefore have little or no ability to absorb water.

[0040] Closed-cell foam can be polyvinyl chloride, polystyrene, or polyethylene foam. These materials have a particularly low density and thus increase buoyancy.

[0041] The outer chamber may have a valve. The valve may be designed to selectively admit gas into or discharge gas from the outer chamber. This allows the buoyancy force to be flexibly adjusted.

[0042] Other important applications for the buoyancy aid according to the invention include rehabilitation and disability support. A buoyancy aid ensures a high level of comfort and does not impede natural movement, thus providing effective support for appropriate therapies.

[0043] In summary, without limiting further possible embodiments, the following embodiments are proposed: Embodiment 1: Belt system for a buoyancy aid, comprising a belt designed to be worn around a torso area of ​​a person, two side fastening elements each designed to releasably fasten a buoyancy body, wherein the side fastening elements are arranged at two lateral positions on the belt such that the side fastening elements are located laterally on the back of the person wearing the belt when the belt is worn, a back fastening element which is designed for the releasable fastening of a buoyancy body, wherein the back fastening element is arranged at a central position on the belt between the side fastening elements such that the back fastening element is located centrally on the back of the wearer when the belt is worn, wherein the belt is designed for the selective fastening of two buoyancy bodies to the side fastening elements or of one buoyancy body to the back fastening element. Embodiment 2: Belt system according to the preceding embodiment, wherein the belt is elastic. Embodiment 3: Belt system according to one of the preceding embodiments, wherein the side fastening elements and the back fastening element are fixedly attached to the belt. Embodiment 4: Belt system according to one of the preceding embodiments, wherein the side fastening elements and / or the back fastening element have a tab, a buckle, a tensioning device and / or a clip for clamping and / or clipping in the buoyancy bodies. Embodiment 5: Belt system according to the preceding embodiment, wherein the side fastening elements and / or the back fastening element have a belt portion, wherein the belt portion is designed to pass through an opening of the buoyancy body for fastening the buoyancy body. Embodiment 6: Belt system according to one of the preceding embodiments, The buoyancy bodies are designed as swimming sleeves. Embodiment 7: Belt system according to one of the preceding embodiments, wherein the side fastening elements and the back fastening element are each designed for releasably fastening a two-chamber buoyancy body. Embodiment 8: Belt system according to one of the preceding embodiments, wherein a free length of the belt, which can be arranged around the torso area of ​​the person, is variable. Embodiment 9: Belt system according to one of the preceding embodiments, whereby a free length of the belt, which can be arranged around the torso area of ​​the person, is continuously variable. Embodiment 10: Buoyancy aid comprising two buoyancy bodies and a belt system according to one of the preceding embodiments. Embodiment 11: Buoyancy aid according to the preceding embodiment, wherein the buoyancy bodies are designed as swimming sleeves. Embodiment 12: Buoyancy aid according to one of the two preceding embodiments, wherein the buoyancy bodies are designed as two-chamber buoyancy bodies. Embodiment 13: Buoyancy aid according to the preceding embodiment, wherein the two-chamber buoyancy bodies have an inner chamber filled with a closed-cell foam and an outer chamber surrounding the inner chamber, which can be filled with a gas, in particular air. Embodiment 14: Buoyancy aid according to the preceding embodiment, wherein the closed-cell foam is polyvinyl chloride, polystyrene or polyethylene foam. Embodiment 15: Buoyancy aid according to one of the two preceding embodiments, wherein the outer chamber has a valve, wherein the valve is designed to selectively admit gas into the outer chamber or to discharge gas from the outer chamber. Short description of the characters

[0044] Further details and features will become apparent from the following description of exemplary embodiments, particularly in conjunction with the subclaims. The respective features can be implemented individually or in combination with one another. The invention is not limited to the exemplary embodiments. The exemplary embodiments are illustrated schematically in the figures. Identical reference numerals in the individual figures designate identical or functionally identical elements, or elements that correspond to one another in terms of their functions.

[0045] In detail: Fig. 1 is a perspective view of a buoyancy aid according to an embodiment of the present invention in a first functional state; and Fig. 2 a perspective view of the buoyancy aid according to the embodiment of the present invention in a second functional state. Description of the embodiments

[0046] Fig. 1 shows a perspective view of a buoyancy aid 100 according to an embodiment of the present invention in a first functional state. The buoyancy aid 100 has a belt system 102. The belt system 102 has a belt 104. The belt 104 is designed to be worn around a person's torso. The belt 104 is elastic. The belt 104 has a belt closure 106 with which opposite or opposite ends of the belt 104 can be releasably closed to one another. For example, the belt closure 106 has a buckle 108, such as a snap-in or click buckle. A free length of the belt 104, which can be arranged around the person's torso, is continuously variable. For example, the belt 104 can be threaded through corresponding openings or slots in the belt closure 106 and moved. Such length adjustments for belts and the like are known, for example, from conventional swimming belts.The length adjustment is achieved by deflecting the strap, so that it is guided through two adjacent openings or slots in opposite directions and adjusted to the desired length. The free length can be adjusted accordingly to the circumference of the wearer's torso.

[0047] The belt system 102 further comprises two side fastening elements 110, each designed for releasably attaching a buoyancy body 112. The side fastening elements 110 are arranged at two side positions 114 on the belt 104 such that, when the belt 104 is worn, the side fastening elements 110 are located laterally on the back of the wearer. The side fastening elements 110 are fixedly attached to the belt 104. The side fastening elements 110 comprise, for example, strips or belt sections that are sewn, glued, or otherwise permanently attached to the belt 104. The side fastening elements 110 have a tab, a buckle, a tensioning device, and / or a clip for clamping and / or clipping in the buoyancy bodies 112. In the embodiment shown, the side fastening elements 110 each have a buckle 120, such as a plug-in or click buckle.The side fastening elements 110 have a strap portion 116. The strap portion 116 is designed to pass through an opening 118 of the buoyancy body 112 for securing the buoyancy body 112. The buckle 120 is located on the strap portion 116.

[0048] The belt system 102 further comprises a back fastening element 122 designed for releasably attaching a buoyancy body 112. The back fastening element 122 is arranged at a central position 124 on the belt 104 between the side fastening elements 110 such that, when the belt 104 is worn, the back fastening element 122 is located centrally on the back of the wearer. The back fastening element 122 is fixedly attached to the belt 104. The back fastening element 122 comprises, for example, strips or belt sections that are sewn, glued, or otherwise permanently fastened to the belt 104. The back fastening element 122 has a tab, a buckle, a tensioning device, and / or a clip for clamping and / or clipping in the buoyancy bodies 112. In the embodiment shown, the side fastening elements 110 each have a buckle 126, such as a snap or click buckle.The back fastening element 122 has a strap portion 128. The strap portion 128 is designed to pass through an opening 118 of the buoyancy body 112 for securing the buoyancy body 112. The buckle 126 is located on the strap portion 128.

[0049] The buoyancy aid 100 comprises two buoyancy bodies 112. The buoyancy bodies 112 are designed, in particular, as swimming sleeves 130. The buoyancy bodies 112 are preferably designed as two-chamber buoyancy bodies 132. The two-chamber buoyancy bodies 132 have an inner chamber 134 filled with a closed-cell foam, and an outer chamber 136 surrounding the inner chamber 134, which can be filled with a gas, in particular air. The closed-cell foam is polyvinyl chloride, polystyrene, or polyethylene foam. The outer chamber 136 has a valve 138. The valve 138 is designed to selectively admit gas into the outer chamber 136 or to discharge gas from the outer chamber. The valve 138 can be an elastic valve 138. The valve 138 is preferably made of plastic, such as polyvinyl chloride (PVC).Filling the outer chamber 134 with gas, such as air, can be accomplished by inflating it with a person's mouth. The valve 138 can, for example, include a check valve to prevent accidental release of air from the outer chamber 136. In this embodiment, gas is released from the outer chamber 136 by squeezing the valve 138 such that the check valve does not rest against the valve seat. Such valves 138 are known to those skilled in the art, for example, from armbands or floatation cushions.

[0050] The belt is designed to selectively attach two buoyancy bodies 112 to the side fastening elements 110 or one buoyancy body 112 to the back fastening element 122. In other words, either two buoyancy bodies 112 are attached to the side fastening elements 110 or one buoyancy body 112 is attached to the back fastening element 122. Accordingly, the side fastening elements 110 and the back fastening element 122 are each designed to releasably attach a two-chamber buoyancy body 132.

[0051] Fig. 1 shows a first functional state in which two buoyancy bodies 112 are attached to the side fastening elements 110. More precisely, one buoyancy body 112 is attached to each side fastening element 112.

[0052] Fig. 2 shows a perspective view of the buoyancy aid 100 according to the embodiment of the present invention in a second functional state. Only the differences to Fig. 1, and identical or comparable components and features are provided with the same reference numerals. In the second functional state, a buoyancy body 112 is attached to the back fastening element 122.

[0053] The functionality of the buoyancy aid 100 and the belt system 102 is described below. In this context, it is explicitly emphasized that the belt system 102 is manufactured and sold separately without the buoyancy aid 112, or the buoyancy aid 100 is sold as a set comprising the belt system 102 and two buoyancy aids 112.

[0054] In a basic state not shown in detail, babies from approximately 10 months or toddlers up to approximately 2.5 to 3 years wear only the buoyancy bodies 112 as swimming sleeves 130 on their arms.

[0055] From approximately 2.5 to 3 years of age, the buoyancy aids 112 or swimming sleeves 130 are tightened or clicked onto the elastic strap 104 into the two outer tabs of the side fastening elements 110. Thus, the strap section 116 of the side fastening elements 110 is inserted through the opening 118 of the buoyancy aids 112 and then locked by means of the closure or buckle 120. The strap 104 is then worn around the stomach or torso. This allows the buoyancy aid 100 to be used like a swimming cushion. When worn, the buoyancy aids 112 are located on the sides of the back. This state is Fig. 1 shown.

[0056] As soon as the person or children can swim better, the buoyancy bodies 112 are removed from the side fastening elements 110 by opening the closure of the belt section 116 or the buckle 120, and one of the two buoyancy bodies 112 is clamped or clicked into the middle buckle 126 of the back fastening element 122. Thus, the belt section 128 of the back fastening element 122 is pushed through the opening 118 of one buoyancy body 112 and then locked by means of the closure or buckle 126. The belt 104 continues to be worn around the stomach or torso. When worn, the buoyancy body 112 is thus located centrally on the back. This state is Fig.2. Adaptation of the free length of the belt 104 to the circumference of the person's torso is possible by extending the belt strap of the belt 104 by the belt fastener 106 or the buckle 108 of the belt system 102. List of reference symbols 100 buoyancy aids 102 Belt system 104 Belt 106 Belt buckle 108 Buckle 110 Side fastening element 112 buoyancy bodies 114 Page position 116 Belt section 118 Opening 120 buckle 122 Back fastening element 124 center position 126 Buckle 128 belt section 130 swim sleeves 132 two-chamber buoyancy bodies 134 inner chamber 136 outer chamber 138 Valve QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 200 05 183 U1

[0004] DE 32 399 29 C2

[0004] DE 10 2004 014 891 B4

[0005]

Claims

[1] Belt system (102) for a buoyancy aid (100), comprising a belt (104) adapted to be worn around a torso region of a person, two side fastening elements (110), each designed for releasably fastening a buoyancy body (112), wherein the side fastening elements (110) are arranged at two side positions (114) on the belt (104) such that the side fastening elements (110) are located laterally on the back of the person wearing the belt (104) when the belt (104) is worn, a back fastening element (122) which is designed for the releasable fastening of a buoyancy body (112), wherein the back fastening element (122) is arranged at a central position (124) on the belt (104) between the side fastening elements (110) such that the back fastening element (122) is located centrally on the back of the wearer when the belt (104) is worn, wherein the belt (104) is designed for the selective fastening of two buoyancy bodies (112) to the side fastening elements (110) or of one buoyancy body (112) to the back fastening element (122). [2] Belt system (102) according to the preceding claim, wherein the belt (104) is elastic. [3] Belt system (102) according to one of the preceding claims, wherein the side fastening elements (110) and the back fastening element (122) are fixedly attached to the belt (104). [4] Belt system (102) according to one of the preceding claims, wherein the side fastening elements (110) and / or the back fastening element (122) have a tab, a buckle (120, 126), a tensioning device and / or a clip for clamping and / or clipping in the buoyancy bodies (112). [5] Belt system (102) according to the preceding claim, wherein the side fastening elements (110) and / or the back fastening element (122) have a belt portion (116, 128), wherein the belt portion (116, 128) is designed to pass through an opening (118) of the buoyancy body (112) for fastening the buoyancy body (112). [6] Belt system (102) according to one of the preceding claims, wherein the buoyancy bodies (112) are designed as swimming sleeves (130). [7] Belt system (102) according to one of the preceding claims, wherein the side fastening elements (110) and the back fastening element (122) are each designed for releasably fastening a two-chamber buoyancy body (132). [8] Belt system (102) according to one of the preceding claims, wherein a free length of the belt (104) which can be arranged around the torso region of the person is variable. [9] Belt system (102) according to one of the preceding claims, wherein a free length of the belt (104) which can be arranged around the torso region of the person is continuously variable. [10] Swimming aid (100) comprising two buoyancy bodies (112) and a belt system (102) according to one of the preceding claims. [11] Swimming aid (100) according to the preceding claim, wherein the buoyancy bodies (112) are designed as swimming sleeves (130). [12] Swimming aid (100) according to one of the two preceding claims, wherein the buoyancy bodies (112) are designed as two-chamber buoyancy bodies (132). [13] Swimming aid (100) according to the preceding claim, wherein the two-chamber buoyancy bodies (132) have an inner chamber (134) filled with a closed-cell foam and an outer chamber (136) surrounding the inner chamber (134) which can be filled with a gas, in particular air. [14] Buoyancy aid (100) according to the preceding claim, wherein the closed-cell foam is polyvinyl chloride, polystyrene or polyethylene foam. [15] Buoyancy aid (100) according to one of the two preceding claims, wherein the outer chamber (136) has a valve (138), the valve (138) being designed to selectively admit gas into the outer chamber (136) or to discharge gas from the outer chamber (136).

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