Anti-breaking chest expander
By incorporating protrusions and a gradually changing diameter design at stress concentration points in the tensioner, the problem of easy breakage at the connection points and middle positions of the tensioner is solved, resulting in higher structural strength and service life.
Patent Information
- Application Number
- CN202422621536.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Existing elastic material tensioners are prone to breakage at joints and in the middle, resulting in a shortened service life.
Raised or discontinuous raised sections are provided at the connection between the pull ring and the elastic connector and in the middle part to increase the thickness of the stress concentration area and disperse the stress. A pull ring design with a gradually changing diameter is adopted to improve the structural strength.
It enhances the structural strength of the tensioner at stress concentration points, disperses stress, extends service life, prevents breakage, and improves durability.
Smart Images
Figure CN223504769U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to body -building equipment technical field especially, a kind of anti-breaking pulley. BACKGROUND
[0002] Modern people's life, usually due to busy work, and sit in front of computer for a long time, or lack of exercise, leading to physical discomfort. And the birth of pulley can well solve these problems, pulley can be well exercised to back, shoulder, arm and other different parts by stretching, which helps to relax body and mind.
[0003] The conventional elastic material pulley, due to the connection between the pull ring and the middle part, and the middle position of the pulley, stress is very concentrated, and then lead to the fracture of these parts. INVENTION CONTENTS
[0004] The utility model discloses to solve the problem that the existing elastic material pulley, pull ring and middle part connection and middle position of pulley lead to easy fracture, the technical scheme adopted is: a kind of anti-breaking pulley, comprising: elastic connecting piece and pull ring, the both ends of the elastic connecting piece are equipped with the pull ring, the connection between the pull ring and the elastic connecting piece and / or the elastic connecting piece between two the connection is equipped with continuous or discontinuous convex.
[0005] Further improvement is that the diameter of the annular part of the pull ring gradually increases as it approaches the connection.
[0006] Further improvement is that the pull ring is made of elastic material.
[0007] Further improvement is that each end of the elastic connecting piece is equipped with at least two pull rings.
[0008] Further improvement is that the distance between the outer end of each pull ring on the same end of the elastic connecting piece and the connection in the length direction of the elastic connecting piece is different.
[0009] Further improvement is that the diameter of the annular part of each pull ring on the same end of the elastic connecting piece is different.
[0010] Further improvement is that at least one handle is provided in the pull ring, and the two ends of the handle are connected to the inner side of the pull ring.
[0011] Further improvement is that the pull ring is provided with convex and / or concave.
[0012] The utility model has the beneficial effects that:
[0013] The anti-breaking tension device provided by the utility model increases the thickness of the stress concentration part by setting the convex part at the stress concentration part, improves the structural strength of the part, and disperses the stress at the middle position of the tension device by the setting of the convex part, so that the tension device is more durable and less likely to break, and the service life is greatly prolonged. BRIEF DESCRIPTION OF DRAWINGS
[0014] The utility model is further described below in combination with the drawings and examples.
[0015] Figure 1 is the anti-breaking tension device structure schematic diagram of the embodiment one of the utility model;
[0016] Figure 2 is the anti-breaking tension device structure schematic diagram of the embodiment two of the utility model;
[0017] Figure 3 is the anti-breaking tension device structure schematic diagram of the embodiment three of the utility model;
[0018] Figure 4 is the anti-breaking tension device structure schematic diagram of the embodiment four of the utility model;
[0019] Figure 5 is the anti-breaking tension device structure schematic diagram of the embodiment six of the utility model. DETAILED DESCRIPTION
[0020] The utility model will be further described in combination with the drawings. These drawings are all simplified schematic diagrams, and only the basic structure of the utility model is schematically shown, so they only show the structure related to the utility model.
[0021] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0022] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0023] In the utility model, unless there are explicit provisions and limitations, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements, the above-mentioned terms in the utility model can be understood according to the specific meaning according to the specific circumstances for the ordinary skilled in the art.
[0024] Embodiment one
[0025] As Figure 1 The utility model provides a kind of anti-breaking tensile force device, including: elastic connecting piece 1 and pull ring 2, the elastic connecting piece 1 is made of rubber or silica gel, the both ends of the elastic connecting piece 1 are equipped with the pull ring 2, and the two can be integrally formed design, if it is split design, the two can adopt the connecting mode of hook and hole, or button type connection and the like mode.In the connection of the pull ring 2 and the elastic connecting piece 1 3 (Y-shaped part) there is protrusion 4, the protrusion 4 is the protrusion relative to elastic connecting piece 1 part height (the height when being laid on plane) or the protrusion relative to pull ring 2 holding part height (the height when being laid on plane), the protrusion is block-like after spherical shape;Or is the protrusion in the center point of connection 3 (the center point of Y-shaped part and nearby) highest, then gradually lower height to periphery.Due to having the protrusion 4, the structural strength of connection 3 (Y-shaped part) is increased, and then the place is not easy to be torn in use.At the same time, the protrusion 4 at the position can be single protrusion, or the protrusion array formed by multiple small protrusions.
[0026] The anti-breaking tensile force device provided by the utility model increases the thickness of stress concentration part by setting protrusion at stress concentration part, improves the structural strength of the place, and then makes the tensile force device more durable, not easy to break, greatly prolongs service life.
[0027] Due to stress concentration, the part of pull ring close to connection is also easy to break, in order to avoid the occurrence of this problem, the further improvement of the technical scheme is that the annular part 21 of the pull ring 2 gradually increases in diameter close to the connection 3, that is, the closer to the stress concentration part, the larger the diameter of the pull ring, and the greater the tensile force that can be withstood, thereby improving the structural strength and prolonging the service life.
[0028] Further improvement is that the pull ring 2 is made of elastic material, preferably, the material is consistent with the elastic connecting piece 1, so that the tensile force device can be integrally formed, the structure is simplified, the production cost is reduced, and the production efficiency is improved.
[0029] A further improvement is that each end of the elastic connector 1 is provided with at least two pull rings 2. The pull rings are made of the same material as the elastic connector 1, and are both elastic, capable of being stretched to a certain extent.
[0030] To broaden the applicability of this puller and meet the needs of different users, a further improvement to this technical solution is that the distance between the outer end of each pull ring 2 at the same end of the elastic connector 1 and the connection point 3 along the length of the elastic connector 1 is different. When the distal pull ring and the proximal pull ring are pulled respectively, the puller generates different resistance forces when pulled the same distance due to the different overall lengths affected by the pulling force. This allows the puller to be adjusted to different tension levels during use to meet the needs of different users.
[0031] Example 2
[0032] like Figure 2 As shown, during the use of the tensioner, the middle part of the elastic connector 1 is prone to breakage due to the tension of the opposing force. To solve this problem, a continuous protrusion 4 is added to the elastic connector 1 along its length, and this protrusion at least covers the middle part of the elastic connector 1. This protrusion 4 can be a long, upward-protruding block-shaped protrusion, or it can be a plurality of parallel protrusions. Moreover, this protrusion 4 does not extend to one or both sides of the elastic connector 1.
[0033] Example 3
[0034] like Figure 3 As shown, the difference between this embodiment and Embodiment Two is that the elastic connector 1 has discontinuous protrusions 4. These protrusions can be integrally formed during the manufacturing of the tensioner. The protrusions 4 can be discontinuous block protrusions, with multiple protrusions arranged in a line along the length of the elastic connector 1 and evenly distributed on the elastic connector 1. Alternatively, multiple protrusions can be arranged in an array along the length of the elastic connector 1. The middle portion of the elastic connector 1 is covered by protrusions 4. In the above scheme, the stress in the middle portion of the elastic connector 1 is dispersed by multiple protrusions, thereby reducing the stress in the middle portion of the elastic connector 1 and preventing the middle portion of the elastic connector 1 from breaking.
[0035] Example 4
[0036] like Figure 4As shown, in order to solve the problem of easy breaking of the connection part 3 (Y-shaped part) between the pull ring 2 and the elastic connecting piece 1 and the middle part of the elastic connecting piece 1, the technical solution has a protrusion 4 at the connection part 3 (Y-shaped part) between the pull ring 2 and the elastic connecting piece 1. The protrusion 4 is a protrusion relative to the height of the part of the elastic connecting piece 1 (the height when placed on a plane) or a protrusion relative to the height of the holding part of the pull ring 2 (the height when placed on a plane). The protrusion is block-shaped or spherical. Alternatively, the protrusion is the highest at the center point of the connection part 3 (the center point of the Y-shaped part and the surrounding part) and gradually decreases in height towards the surrounding part. Due to the protrusion 4, the structural strength of the connection part 3 (Y-shaped part) is increased.
[0037] Meanwhile, a continuous or discontinuous protrusion 4 is arranged on the elastic connecting piece 1 along the length direction. The continuous protrusion can increase the overall structural strength of the elastic connecting piece 1. The discontinuous protrusion is arranged on the elastic connecting piece 1, but at least one protrusion is arranged at the middle part. Through the discontinuous protrusions, the stress of the middle part of the elastic connecting piece 1 is dispersed, and the middle part is prevented from being pulled apart.
[0038] Example Five
[0039] In this embodiment, a different design is adopted to realize the adjustment of different tension levels, which is as follows:
[0040] The diameters of the ring-shaped parts 21 of the pull rings 2 at the same end of the elastic connecting piece 1 are different. Due to the different diameters of the pull rings, different tensions are required when the pull rings are pulled by the same distance. The user can hold the pull rings at the two ends of the tensioner by the left and right hands to realize the adjustment of different tension levels.
[0041] Example Six
[0042] As shown, in this embodiment, a different design is adopted to realize the adjustment of different tension levels, which is as follows: Figure 5
[0043] The pull ring part of the tensioner has only one pull ring in this solution. Different handles are used to realize different resistance levels. Compared with the design of two pull rings, the structure is simpler and more beautiful, and it is convenient for production and manufacturing. When used, the user can hold the handles at the two ends of the tensioner by the left and right hands or hold the outer end of the pull ring. Due to the different overall lengths of the tensioner under the action of tension, different resistance levels are generated when the tensioner is pulled by the same distance, thereby realizing the multi-level adjustment of tension.
[0044] In order to avoid slipping at the holding position during use, the further improvement of the technical scheme is that the pull ring 2 is provided with protrusions and / or recesses, thereby increasing the friction force at the holding position and avoiding slipping. The protrusions can be dot array protrusions, or bumps, or strip-shaped protrusions, spherical protrusions, bamboo joint-shaped protrusions, etc. The recesses can be dot-shaped recesses, strip-shaped recesses, straight line-shaped recesses, curved line-shaped recesses, etc. At the same time, in order to further increase the friction force at the holding position of the pull ring or handle, a design of protrusions plus recesses can also be adopted.
[0045] Based on the above ideal embodiments of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.
Claims
1. A tension-resistant device to prevent breakage, characterized in that, include: The elastic connector and the pull ring are provided at both ends of the elastic connector. The elastic connector has continuous or discontinuous protrusions at the connection between the pull ring and the elastic connector and / or between the two connection points.
2. The anti-breakage tensioner according to claim 1, characterized in that, The diameter of the ring-shaped portion of the pull ring gradually increases as it approaches the connection point.
3. The anti-breakage tensioner according to claim 2, characterized in that, The pull ring is made of an elastic material.
4. The anti-breakage tensioner according to claim 3, characterized in that, Each end of the elastic connector is provided with at least two pull rings.
5. The anti-breakage tensioner according to claim 4, characterized in that, The distance between the outer end of each pull ring at the same end of the elastic connector and the connection point is different along the length direction of the elastic connector.
6. The anti-breakage tensioner according to claim 4, characterized in that, The diameter of the annular portion of each of the pull rings at the same end of the elastic connector is different.
7. The anti-breakage tensioner according to claim 1, characterized in that, The pull ring has at least one handle, and the two ends of the handle are connected to the inner side of the pull ring.
8. The anti-breakage tensioner according to claim 1, characterized in that, The pull ring has protrusions and / or recesses.