Chest expander

Abstract

The utility model discloses a chest expander. The chest expander comprises an elastic band, a grip and a lifting handle, an installation lantern ring is formed at one end of the elastic band, the grip is arranged in the installation lantern ring in a penetrating mode, and in the natural stretching state, the outer diameter of the grip is larger than or equal to the inner radial size of the installation lantern ring; the handle is provided with a mounting portion, the mounting portion and the mounting lantern ring are fixed in a bonding or sewing mode, and the mounting portion is located between the mounting lantern ring and the grip and located on the opposite side of the elastic band body. In the actual use process, the mounting lantern ring bears force towards the other end of the elastic belt, when the handle is used for stretching training, the mounting lantern ring presses the mounting portion of the handle against the grip, the handle is not prone to disengaging from the mounting lantern ring, and the service life of the pull belt is prolonged. Meanwhile, due to the fact that the thickness of the handle is increased by one layer in the radial direction of the installation lantern ring, the installation lantern ring can be arranged on the grip in a sleeving mode more firmly in cooperation with the resilience force of the installation lantern ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to body -building equipment technical field especially relates to a chest expander. BACKGROUND

[0002] The chest expander is a body -building equipment, mainly used for enhancing muscle strength and improving body shape. It can simulate different resistance, so that the user can carry out diversified exercise at home or gym. The patent document with the application number 2023226141918 discloses a chest expander, and one end of the chest expander is formed with a chest expander ring, the surface of the chest expander ring is symmetrically provided with a chest expander connecting hole, the two ends of the handle are symmetrically provided with connecting bolts, and the connecting bolts are matched with the chest expander connecting hole to fix the handle and the chest expander.

[0003] Because the chest expander with the structure needs to be provided with a through hole on the chest expander ring of the chest expander, when the handle is held to carry out stretching training, with the increase of stretching intensity, the through hole is enlarged due to the deformation of the chest expander at the through hole, which easily causes fastening failure, and affects the service life of the chest expander. UTILITY MODEL CONTENT

[0004] The utility model provides a chest expander for the above problems.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] The application provides a chest expander, which comprises an elastic band, a handle and a handle.

[0007] One end of the elastic band is formed with a mounting ring, the handle is arranged in the mounting ring, and the outer diameter of the handle is greater than or equal to the internal radial dimension of the mounting ring in a natural elongation state.

[0008] The handle has a mounting portion, the mounting portion is adhesively fixed or sewn fixed with the mounting ring, the mounting portion is located between the mounting ring and the handle, and the mounting portion is located on the opposite side of the body of the elastic band.

[0009] In actual use, the mounting ring is subjected to force towards the other end of the elastic band, when the handle is used for stretching training, the mounting ring presses the mounting portion of the handle against the handle, the handle is not easy to be pulled out of the mounting ring, the service life of the elastic band is prolonged, and the service life of the chest expander is also improved. At the same time, the mounting ring is wrapped and clamped more tightly on the handle (that is, the mounting ring is limited once by the handle) due to the thickness of the handle inside the mounting ring and the resilience of the mounting ring itself.

[0010] Further, the handle sleeve is arranged on the two ends of the mounting sleeve, and the handle sleeve is used to further limit the axial movement of the mounting sleeve along the handle.

[0011] The handle sleeve has elasticity, and the inner diameter of the handle sleeve is smaller than the outer diameter of the handle in the natural elongation state. When the handle sleeve is installed on the handle, the handle sleeve is in the stretched state and is positioned on the outside of the handle by the elastic force of the handle sleeve. In actual use, the hands are held outside the handle sleeve, and the greater the gripping force, the less likely the handle sleeve moves. At the same time, since the handle sleeve cannot move, the movement of the mounting sleeve is also ensured, and the mounting sleeve is limited to the position between the two handle sleeves.

[0012] Since the existing puller needs to make anti-skid grooves in the middle of the handle, the puller sleeve ring is not easy to install when the pull belt and the handle are assembled, and the overall manufacturing process of the handle is complex, which is not conducive to reducing production costs. In the present application, the handle sleeve is arranged on the two side ends of the mounting sleeve to further position the mounting sleeve, the overall structure is simple, the firmness is high, and the assembly is more convenient.

[0013] Further, the outer diameter of the handle is equal, and the handle sleeve is elastic foam.

[0014] Further, the side cover is arranged on the two ends of the handle, and the side cover is used to prevent the handle sleeve from falling off the handle.

[0015] Further, the side cover is a metal side cover, and the side cover has a mounting portion and a blocking portion arranged on the mounting portion, and the outer diameter of the blocking portion is greater than the outer diameter of the handle.

[0016] The two ends of the handle have axial mounting holes, and the mounting portion of the side cover is arranged in the axial mounting hole.

[0017] Further, the elastic belt is an elastic woven belt, and the handle is a flexible woven belt, and the mounting portion of the handle is sewn and fixed with the mounting sleeve.

[0018] Alternatively, the elastic belt is an elastic adhesive tape, and the mounting portion of the handle is adhesively fixed with the mounting sleeve.

[0019] Further, when the elastic belt is an elastic woven belt and the handle is a flexible woven belt, the puller further comprises a first reinforcing ring layer.

[0020] The end portion of the elastic woven belt is formed into the mounting sleeve by sewing, and the first reinforcing ring layer is used to cover the sewing position of the elastic woven belt and is sewn together with the elastic woven belt to enhance the firmness of the sewing.

[0021] Further, the elastic band is connected with a foot weaving belt away from one end of the mounting ring, and the foot weaving belt is used for stretching training in cooperation with the handle or the lifting handle.

[0022] In actual use, the connection between the foot weaving belt and the elastic band is under great stress, and the first reinforcing ring layer is beneficial to improve the sewing firmness of the foot weaving belt and the elastic band and prolong the service life of the stretching trainer.

[0023] Further, the foot weaving belt comprises two foot weaving belts, and the adjacent weaving legs of the two foot weaving belts are laminated and sewn on the elastic band; in the case that the width of the elastic band is unchanged, the laminated mode makes the ring formed by the foot weaving belt larger than that formed by the side-by-side mode, so that the stretching trainer can be applied to more people.

[0024] The adjacent weaving legs of the two foot weaving belts are further provided with a reinforcing sewing line, and the reinforcing sewing line has a distance from the elastic band, and the reinforcing sewing line is used for preventing the two feet from being excessively separated and the sewing line at the position of the first reinforcing ring layer from being damaged due to the excessive separation of the two feet.

[0025] Further, the second reinforcing ring layer is further included, and the second reinforcing ring layer is used for being sleeved on the sewing position of the elastic band and the foot weaving belt and being sewn together with the elastic band and the foot weaving belt to enhance the sewing firmness.

[0026] Further, the foot weaving belt is further provided with a protective layer, and the protective layer is used for preventing the foot weaving belt from being damaged by the foot.

[0027] The stretching trainer provided by the application has at least three use methods: stretching training is performed by holding the lifting handle and the foot weaving belt with two hands respectively, stretching training is performed by holding the handle with the hand and stepping on the foot weaving belt, and stretching training is performed by holding the handle with two hands and stepping on the foot weaving belt.

[0028] The stretching trainer provided by the application has at least three use methods: stretching training is performed by holding the lifting handle and the foot weaving belt with two hands respectively, stretching training is performed by holding the handle with the hand and stepping on the foot weaving belt, and stretching training is performed by holding the handle with two hands and stepping on the foot weaving belt.

[0029] (1) When the lifting handle is used for stretching training, the mounting ring is pressed against the handle, the lifting handle is not easy to be separated from the mounting ring, and the service life of the stretching belt is prolonged.

[0030] (2) The handle is arranged as a straight rod with equal outer diameters, the lifting handle is arranged between the mounting ring and the handle, the lifting handle can be positioned once on the mounting ring by the cooperation of the elastic force of the mounting ring and the handle, the elastic handle sleeve is arranged on the handle on the two sides of the mounting ring to position the mounting ring twice, and the mounting of the mounting ring on the handle is more firm and reliable.

[0031] (3) by the inner diameter of the elastic sleeve is less than the outer diameter of the handle, the sleeve is covered, positioned in the handle by its own elastic force, in actual use, the hands are held in the sleeve, the greater the grip, the sleeve is not easy to produce movement. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the shaft side structure schematic diagram of the tension device of the embodiment of the utility model (the installation sleeve ring is in the state of being stretched);

[0033] Figure 2 is Figure 1 the local enlarged structure schematic diagram of A in figure

[0034] Figure 3 is the local structure schematic diagram of the tension device foot weaving belt of the embodiment of the utility model.

[0035] The reference signs in the figures are as follows:

[0036] 10, elastic belt; 110, installation sleeve ring; 20, handle; 30, handle; 310, installation part; 40, sleeve; 50, side cover; 60, first reinforcing ring layer; 70, foot weaving belt; 710, weaving leg; 720, reinforcing sewing line; 80, second reinforcing ring layer; 90, protective layer. DETAILED DESCRIPTION

[0037] The utility model will be described in detail in combination with the drawings.

[0038] As Figures 1-3 shown, the present application provides a tension device, including elastic belt 10, handle 20 and handle 30;

[0039] The elastic belt 10 one end is formed with installation sleeve ring 110, handle 20 is arranged in installation sleeve ring 110, and the outer diameter of handle 20 is greater than or equal to the internal radial dimension of installation sleeve ring 110 in natural elongation state.

[0040] Handle 30 has installation part 310, and installation part 310 is adhesively fixed or sewn fixed with installation sleeve ring 110, and installation part 310 is located between installation sleeve ring 110 and handle 20, and is located at the opposite side of the body of elastic belt 10.

[0041] In actual use, the mounting sleeve 110 is subjected to a force towards the other end of the elastic band 10, and when the handle 30 is used for stretching training, the mounting sleeve 110 presses the mounting portion 310 of the handle 30 against the grip 20, so that the handle 30 is not easy to be pulled out of the mounting sleeve 110, thereby prolonging the service life of the elastic band and improving the service life of the said tensile device. At the same time, due to the fact that the inside of the mounting sleeve 110 is radially provided with one more thickness of the handle 30, and in combination with the resilience of the mounting sleeve 110 itself, the mounting sleeve 110 can be more tightly sleeved on the grip 20 in a wrapped clamping manner (i.e. the handle 30 limits the mounting sleeve 110 once).

[0042] In the embodiment, a sleeve 40 is further included, the grip 20 passes through the mounting sleeve 110, and the sleeve 40 is sleeved on the two end portions of the grip 20 passing through the mounting sleeve 110, respectively. The sleeve 40 is used to further limit the axial movement of the mounting sleeve 110 along the grip 20.

[0043] The sleeve 40 is elastic, and in a natural elongated state, the inner diameter of the sleeve 40 is smaller than the outer diameter of the grip 20. When the sleeve 40 is installed on the grip 20, the sleeve 40 is in a stretched state and is positioned on the outside of the grip 20 by relying on the resilience of the sleeve 40 itself. In actual use, both hands are held outside the sleeve 40, and the greater the gripping force, the more difficult it is for the sleeve 40 to move. At the same time, since the sleeve 40 cannot move, the movement of the mounting sleeve 110 is further ensured, so that the mounting sleeve 110 is limited to be positioned between the two sleeves 40.

[0044] Since the existing tensile device needs to make anti-skid grooves in the middle portion of the grip 20, and the elastic sleeve is not easy to be installed due to the fact that the outer diameters of the two ends of the grip 20 are greater than the outer diameter of the middle portion when the elastic band and the grip 20 are assembled, and the overall manufacturing process of the grip 20 is complex, which is not conducive to reducing the production cost. In the present application, the sleeve 40 is arranged at the two side ends of the mounting sleeve 110 to limit the mounting sleeve 110 twice, and the overall structure is simple and firm, and the assembly is more convenient.

[0045] In the embodiment, the outer diameters of the grip 20 are equal, and the sleeve 40 is elastic foam.

[0046] In the embodiment, a side cover 50 is further included, the side cover 50 is arranged on the two end portions of the grip 20, and the side cover 50 is used to prevent the sleeve 40 from falling off the grip 20.

[0047] In the embodiment, the side cover 50 is a metal side cover 50, and the side cover 50 has a mounting portion 310 and a blocking portion arranged on the mounting portion 310, and the outer diameter of the blocking portion is greater than the outer diameter of the grip 20.

[0048] The two ends of the grip 20 have axial mounting holes, and the mounting portion 310 of the side cover 50 is arranged in the axial mounting hole.

[0049] In other embodiments, the side cover 50 can also be a mounting sleeve, from the sleeve 40 side end set in the handle 20 both ends.

[0050] In this embodiment, the elastic band 10 is an elastic fabric belt, the handle 30 is a flexible fabric belt, the mounting portion 310 of the handle 30 is sewn and fixed with the mounting sleeve ring 110;

[0051] Alternatively, the elastic band 10 is an elastic tape, and the mounting portion 310 of the handle 30 is adhesively fixed with the mounting sleeve ring 110.

[0052] In this embodiment, when the elastic band 10 is an elastic fabric belt and the handle 30 is a flexible fabric belt, the tensioner further comprises a first reinforcing ring layer 60;

[0053] The end of the elastic fabric belt is formed by sewing a mounting sleeve ring 110, and the first reinforcing ring layer 60 is used to cover the sewing position of the elastic fabric belt and is sewn together with the elastic fabric belt to enhance the firmness of the sewing.

[0054] In this embodiment, the elastic band 10 is connected with a foot fabric belt 70 at the end away from the mounting sleeve ring 110, and the foot fabric belt 70 is used to cooperate with the handle 20 or the handle 30 to realize stretching training.

[0055] In this embodiment, the foot fabric belt 70 comprises two, and the adjacent fabric legs 710 of the two foot fabric belts 70 are laminated and sewn onto the elastic band 10; in the case where the width of the elastic band does not change, the laminated manner makes the loop formed by the foot fabric belt 70 larger than the side-by-side arrangement, so it can be applied to more people. That is, the adjacent fabric legs 710 of the foot fabric belt 70 are laminated and sewn onto the elastic band 10, which can improve the user population of the tensioner.

[0056] The adjacent fabric legs 710 of the two foot fabric belts 70 are further provided with a reinforcing sewing line 720, and the reinforcing sewing line 720 has a distance from the elastic band 10. The reinforcing sewing line is used to prevent the two feet from being excessively separated and to prevent the sewing line at the first reinforcing ring layer position of the foot fabric belt and the elastic fabric belt from being damaged due to the excessive separation of the two feet. That is, the reinforcing sewing line can effectively prolong the service life of the foot fabric belt and the tensioner.

[0057] In this embodiment, a second reinforcing ring layer 80 is further included, which is used to cover the sewing position of the elastic fabric belt and the foot fabric belt 70 and is sewn together with the elastic fabric belt and the foot fabric belt 70 to enhance the firmness of the sewing.

[0058] In actual use, multiple layers of fabric threads can be sewn on the first reinforcing ring layer 60 and the second reinforcing ring layer 80 to make the firmness more optimal.

[0059] In the embodiment, the foot-woven belt 70 is further provided with a protective layer 90, which is used to prevent the foot-woven belt 70 from being damaged by stepping.

[0060] The above merely describes the preferred embodiments of the present application, and does not limit the patent protection scope of the present application. Any equivalent structural transformation, direct or indirect application in other related technical fields, and the like are also included in the protection scope of the present application.

Claims

1. A rowing machine characterized by, The elastic band, the handle and the handle. One end of the elastic band is provided with a mounting ring, the handle is arranged in the mounting ring, and the outer diameter of the handle is greater than or equal to the inner diameter of the mounting ring in the natural elongation state. The handle has a mounting portion, which is adhesively fixed or sewn to the mounting ring, and is located between the mounting ring and the handle and on the opposite side of the body of the elastic band.

2. A tensile machine as claimed in claim 1, characterised in that The handle is arranged out of the mounting ring, and the sleeve is arranged on both ends of the handle out of the mounting ring to further limit the axial movement of the mounting ring along the handle. The sleeve has elasticity, and the inner diameter of the sleeve is smaller than the outer diameter of the handle in the natural elongation state.

3. A tensile machine as claimed in claim 2, wherein the pulley is mounted on a shaft which is rotatable about an axis which is parallel to the axis of rotation of the drum. The outer diameter of the handle is equal, and the sleeve is elastic foam.

4. A tensile machine as claimed in claim 2, wherein the pulley is mounted on a shaft which is rotatable about an axis which is parallel to the axis of rotation of the drum. The side cover is arranged on both ends of the handle to prevent the sleeve from falling off the handle.

5. A tensile machine as claimed in claim 1, wherein The elastic band is an elastic fabric belt, and the handle is a flexible fabric belt, and the mounting portion of the handle is sewn to the mounting ring. Alternatively, the elastic band is an elastic adhesive tape, and the mounting portion of the handle is adhesively fixed to the mounting ring.

6. A tensile machine as claimed in claim 5, characterised in that the pulley is mounted on a shaft which is rotatable about an axis which is parallel to the axis of the pulley. When the elastic band is an elastic fabric belt and the handle is a flexible fabric belt, the tensile device further comprises a first reinforcing ring layer. The end of the elastic fabric belt is sewn to form the mounting ring, and the first reinforcing ring layer is arranged outside the sewing position of the elastic fabric belt and is sewn together with the elastic fabric belt to enhance the sewing firmness.

7. A tensile machine as claimed in claim 5, wherein the pulley is mounted on a shaft which is rotatable about an axis which is parallel to the axis of rotation of the drum. The elastic band is connected with a foot fabric belt at the end away from the mounting ring, and the foot fabric belt is used to cooperate with the handle or the handle to realize stretching training.

8. A tensile machine as claimed in claim 7, characterised in that the pulley is mounted on a shaft which is rotatable about an axis which is parallel to the axis of the pulley. The foot fabric belt comprises two, and the adjacent fabric legs of the two foot fabric belts are laminated and sewn to the elastic band. A reinforcing sewing line is further arranged on the adjacent fabric legs of the two foot fabric belts, and the reinforcing sewing line has a distance from the elastic band.

9. A tensile machine as claimed in claim 7, wherein the pulley is a grooved pulley. A second reinforcing ring layer is further arranged, which is arranged outside the sewing position of the elastic fabric belt and the foot fabric belt and is sewn together with the elastic fabric belt and the foot fabric belt to enhance the sewing firmness.

10. A tensile machine as claimed in claim 7, wherein the pulley is a grooved pulley. A protective layer is further arranged on the foot fabric belt, which is used to prevent the foot fabric belt from being damaged by stepping.

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