CN108283777B

CN108283777B - Improved chest expander

Info

Publication number: CN108283777B
Application number: CN201810363918.0A
Authority: CN
Inventors: 郑学增; 王婕; 邱志祺; 刘昊馨; 霍美杰
Original assignee: North China University of Science and Technology
Current assignee: North China University of Science and Technology
Priority date: 2018-04-22
Filing date: 2018-04-22
Publication date: 2023-03-14
Anticipated expiration: 2038-04-22
Also published as: CN108283777A

Abstract

The invention discloses an improved chest expander which comprises two handles, wherein a plurality of tension springs are connected between the two handles, a rubber sleeve is sleeved on the outer side of each tension spring, any one end of each rubber sleeve is fixedly connected to the corresponding handle, a base is fixedly connected to the inner side of each rubber sleeve, two ratchet wheels are mounted on the base, the mounting directions of the two ratchet wheels are opposite, a plurality of rubber friction plates are connected to the outer sides of the ratchet wheels in a shaft connection mode, and the rubber friction plates are in selective contact with the tension springs. The chest expander can overcome the defects in the prior art and improve the use convenience of the chest expander.

Description

Improved chest developer

Technical Field

The invention relates to a body-building apparatus, in particular to an improved chest expander.

Background

The chest developer is a commonly used fitness equipment. The existing chest developer can not flexibly control the process of stretching and recovering the spring when in use, and is inconvenient to use.

Disclosure of Invention

The invention aims to provide an improved chest expander, which can solve the defects of the prior art and improve the use convenience of the chest expander.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

The utility model provides a modified chest expander, includes two handles, is connected with a plurality of tension spring between two handles, tension spring outside cover is equipped with the rubber sleeve, and the arbitrary one end fixed connection of rubber sleeve is on the handle, and two ratchets are installed to the inboard fixedly connected with base of rubber sleeve on the base, and the installation opposite direction of two ratchets, the outside hub connection of ratchet has a plurality of rubber friction piece, rubber friction piece and the contact of tension spring selectivity.

Preferably, the rubber friction plate is connected with the ratchet wheel through a first spring body.

Preferably, the outer side of the first spring body is sleeved with a plurality of hoops, and the inner diameter of each hoop is adjusted through a bolt.

Preferably, tooth-shaped parts are fixed on two sides of the surface of the rubber friction plate, a groove is formed in the middle of the rubber friction plate, an arc-shaped elastic sheet is fixed in the groove, and a rubber layer is fixed on the surface of the arc-shaped elastic sheet.

Preferably, the handle is axially connected with a support frame, a second spring body is connected between the handle and the support frame, the top of the support frame is movably sleeved with a bracket, and a third spring body is connected between the support frame and the bracket.

Preferably, the surface of the handle is provided with a limiting groove, and a rubber pad is fixed on the inner side of the limiting groove.

Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: the invention utilizes the characteristic of unidirectional rotation of the ratchet wheels, and realizes the limitation on the spring stretching process and the spring recovery process by arranging two ratchet wheels. When the spring is stretched, one ratchet wheel is locked, the other ratchet wheel freely rotates, and the rubber friction sheet on the locking ratchet wheel generates sliding friction with the inner wall of the rubber sleeve, so that the stretching process is limited. When the spring is recovered, the ratchet wheel which rotates freely originally is locked, and the rubber friction plate on the surface of the ratchet wheel and the inner wall of the rubber sleeve generate sliding friction, so that the recovery process is limited. Utilize the clamp to restrict first spring body, can realize the adjustment to rubber friction disc and rubber sleeve inner wall frictional force size. Through specially designing the surface of the rubber friction plate, the smoothness of the friction process between the rubber friction plate and the inner wall of the rubber sleeve can be improved. The bracket is used for supporting the arm or other parts of the body when the chest expander is used, so that the use comfort is improved. The limiting groove with the rubber pad can improve the holding feeling and the holding firmness of the handle.

Drawings

FIG. 1 is a block diagram of one embodiment of the present invention.

Fig. 2 is a structural view of a rubber boot according to an embodiment of the present invention.

Fig. 3 is a structural view of a first spring body in an embodiment of the present invention.

FIG. 4 is a structural view of a rubber friction plate in an embodiment of the present invention.

In the figure: 1. a handle; 2. a tension spring; 3. a rubber sleeve; 4. a base; 5. a ratchet wheel; 6. a rubber friction plate; 7. a first spring body; 8. clamping a hoop; 9. a bolt; 10. a tooth-shaped portion; 11. a groove; 12. an arc-shaped elastic sheet; 13. a rubber layer; 14. a support frame; 15. a second spring body; 16. a bracket; 17. a third spring body; 18. a limiting groove; 19. and (7) a rubber pad.

Detailed Description

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.

Referring to fig. 1-4, a specific embodiment of the invention comprises two handles 1, a plurality of tension springs 2 are connected between the two handles 1, a rubber sleeve 3 is sleeved outside the tension springs 2, any one end of the rubber sleeve 3 is fixedly connected to the handle 1, a base 4 is fixedly connected to the inner side of the rubber sleeve 3, two ratchet wheels 5 are mounted on the base 4, the mounting directions of the two ratchet wheels 5 are opposite, a plurality of rubber friction plates 6 are axially connected to the outer sides of the ratchet wheels 5, and the rubber friction plates 6 are selectively contacted with the tension springs 2. The rubber friction plate 6 is connected with the ratchet wheel 5 through a first spring body 7. The outside cover of first spring body 7 is equipped with a plurality of clamp 8, and its internal diameter is adjusted through bolt 9 to clamp 8. Tooth-shaped parts 10 are fixed on two sides of the surface of the rubber friction plate 6, a groove 11 is arranged in the middle of the rubber friction plate 6, an arc-shaped elastic sheet 12 is fixed in the groove 11, and a rubber layer 13 is fixed on the surface of the arc-shaped elastic sheet 12. A supporting frame 14 is connected on the handle 1, a second spring body 15 is connected between the handle 1 and the supporting frame 14, a bracket 16 is movably sleeved on the top of the supporting frame 14, and a third spring body 17 is connected between the supporting frame 14 and the bracket 16. The surface of the handle 1 is provided with a limit groove 18, and the inner side of the limit groove 18 is fixed with a rubber pad 19.

The tension device can effectively improve the use convenience and safety of the tension device, and a user can flexibly adjust the tension exercise intensity according to the self condition without frequently disassembling the tension spring.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a modified chest expander, includes two handles (1), is connected with a plurality of tension spring (2) between two handles (1), its characterized in that: the rubber sleeve (3) is sleeved on the outer side of the tension spring (2), any one end of the rubber sleeve (3) is fixedly connected to the handle (1), the inner side of the rubber sleeve (3) is fixedly connected with the base (4), the base (4) is provided with two ratchet wheels (5), the mounting directions of the two ratchet wheels (5) are opposite, the outer side of each ratchet wheel (5) is connected with a plurality of rubber friction plates (6) in a shaft connection mode, and the rubber friction plates (6) are in selective contact with the tension spring (2); the rubber friction plate (6) is connected with the ratchet wheel (5) through a first spring body (7); a plurality of hoops (8) are sleeved on the outer side of the first spring body (7), and the inner diameter of each hoop (8) is adjusted through a bolt (9); tooth-shaped parts (10) are fixed on two sides of the surface of the rubber friction plate (6), a groove (11) is formed in the middle of the rubber friction plate (6), an arc-shaped elastic sheet (12) is fixed in the groove (11), and a rubber layer (13) is fixed on the surface of the arc-shaped elastic sheet (12); the handle (1) is connected with a support frame (14) in an upper shaft mode.

2. The improved chest expander of claim 1, wherein: a second spring body (15) is connected between the handle (1) and the support frame (14), a bracket (16) is movably sleeved at the top of the support frame (14), and a third spring body (17) is connected between the support frame (14) and the bracket (16).

3. The improved chest expander of claim 1, wherein: the handle (1) surface is provided with a limiting groove (18), and the inner side of the limiting groove (18) is fixed with a rubber pad (19).