A sit-up assistive device

Abstract

A sit-up aid, characterized in that it includes a base, a support body arranged on the base, and two cross bars arranged on both sides of the support body. The cross bars can be rotatably arranged on the support body between a use state and a folded state. The cross bars in the use state are arranged to extend laterally, and the cross bars in the folded state are close to the support body. The cross bars can be rotatably arranged on the support body between the use state and the folded state, so that the sit-up aid can be folded and stored; a receiving groove for receiving the cross bars is arranged on the support body, so that the folded volume is more compact and small.

Description

Technical Field

[0001] The invention relates to a sit-up assisting device. Background Art

[0002] The existing sit-up assisting device mainly comprises a base, a supporting body vertically arranged on the base, and two horizontal bars arranged on both sides of the supporting body. The base can be adsorbed on the bottom surface by a vacuum suction cup, and the two horizontal bars are arranged to extend laterally. When performing sit-up training, the insteps of the trainee's feet are supported under the two horizontal bars, thereby assisting the trainee in performing sit-up training without the need for additional assistants to perform auxiliary training.

[0003] The two cross bars of the sit-up assisting device of the above structure cannot be folded and stored, occupying a large space and being easy to trip. In addition, the height adjustment of the cross bars is performed by providing a retractable and adjustable support body, which is very troublesome to operate. Summary of the invention

[0004] The purpose of the present invention is to provide a foldable sit-up aid to address the deficiencies in the prior art.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A sit-up assistive device, characterized in that it comprises a base, a support body arranged on the base, and two cross bars arranged on both sides of the support body, wherein the cross bars can be rotatably arranged on the support body between a use state and a folded state, the cross bars in the use state extending laterally, and the cross bars in the folded state close to the support body.

[0007] The support body is provided with a receiving groove for receiving the cross bar in the folded state.

[0008] One end of the cross bar is rotatably arranged on the support body through a pivot shaft, and the pivot shaft is arranged obliquely so that the cross bar in a folded state is inclined and close to the side of the support body.

[0009] The cross bar is provided with a first limiting portion, and the support body is provided with a second limiting portion. The first limiting portion cooperates with the second limiting portion to keep the cross bar in a use state.

[0010] The support body can be rotatably adjusted around a horizontally extending axis or can be locked on the base.

[0011] The base is provided with a laterally extending support shaft, the support body is rotatably arranged on the support shaft, a locking mechanism is provided between the support shaft and the support body, and the locking mechanism enables the support body to rotate or be locked and unable to rotate.

[0012] The locking mechanism includes a plurality of first positioning teeth arranged in an arc on the support shaft, a swing arm arranged on the support body and capable of swinging relative to the first positioning teeth, a pushing member slidably arranged on the support body, a first spring driving the swing arm to swing toward the first positioning teeth, and a second spring driving the pushing member away from the swing arm. The swing arm is provided with a second positioning tooth that can engage with the first positioning teeth, and the pushing member can be operated to slide toward the swing arm to drive the swing arm to swing.

[0013] The base is provided with two support arms extending upward, and the support shaft includes an inner shaft and a sleeve. The cross-section of the inner shaft is non-circular, and the sleeve has a center hole that matches the outer shape of the inner shaft. The second positioning tooth is arranged on the sleeve, and the two support arms are respectively formed with mounting holes for the inner shaft to pass through. The two ends of the inner shaft are installed in the mounting holes by a locking mechanism, and the sleeve is sleeved on the inner shaft between the two support arms.

[0014] The base is provided with a plurality of positioning grooves arranged in an arc shape, the support body is movably provided with a positioning piece which can be embedded in the positioning groove and a spring which drives the positioning piece to be embedded in the positioning groove, and when the support body rotates, the positioning piece can be embedded in the positioning groove and make a sound.

[0015] The base is provided with a vacuum suction cup.

[0016] The present invention has the following beneficial effects:

[0017] The cross bar can be rotatably arranged on the support body between the use state and the folded state, so that the sit-up aid can be folded and stored; a receiving groove for accommodating the cross bar is arranged on the support body, so that the folded volume is more compact and small; the cross bar in the folded state is inclined close to the side of the support body, making the overall structure more reasonable and avoiding vertical closeness to interfere with the arrangement of the base and the support body; the first limiting part cooperates with the second limiting part to ensure that the cross bar remains in the use state and cannot continue to rotate upward after being subjected to an upward force.

[0018] The support body can be rotated and adjusted around a horizontally extending axis or can be locked on the base. The height of the crossbar can be adjusted by adjusting the angle of the support body, so as to adapt to trainers with different foot shapes.

[0019] The locking mechanism is composed of a plurality of first positioning teeth, a swing arm, a pushing member, a first spring, and a second spring, and has the advantages of simple structure, convenient operation, etc.

[0020] The support shaft includes an inner shaft and a sleeve. The two support arms are respectively formed with mounting holes for the inner shaft to pass through. The two ends of the inner shaft are installed in the mounting holes through a locking mechanism. The sleeve is sleeved on the inner shaft between the two support arms. During assembly, the support body with the sleeve is placed between the two support arms. The inner shaft passes through the mounting hole from the outside of the support arm and enters the sleeve to complete the support of the support body. It is locked and fixed by the locking mechanism, thereby facilitating the rapid assembly of the product.

[0021] A plurality of positioning grooves are arranged on the base, and a positioning piece which can be embedded in the positioning groove and a spring which drives the positioning piece to be embedded in the positioning groove are movably arranged on the support body. When the support body rotates, the positioning piece can be embedded in the positioning groove and make a sound, thereby reminding the operator how much the support body has rotated. Multiple angles can be set as needed to facilitate operation and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a stereogram of the present invention.

[0024] Figure 2 It is an exploded view of the present invention.

[0025] Figure 3 It is the internal structure diagram of the present invention.

[0026] Figure 4 It is a cross-sectional view of the present invention.

[0027] Figure 5 for Figure 4 Enlarged view of part A in . DETAILED DESCRIPTION

[0028] Reference Figures 1 to 5 As shown, a sit-up aid comprises a base 1, a support body 3 and two cross bars 4.

[0029] A vacuum suction cup 21 that can be adsorbed on a plane is provided at the bottom of the base 1. The vacuum suction cup 21 is operated by an operating handle 22, a pull rod 23 and a spring 24. The specific structure and working method are well-known in the prior art and will not be described in detail here.

[0030] The base 1 is provided with two support arms 11 extending upward, and the two support arms 11 are arranged opposite to each other at a lateral interval. The support body 3 is supported between the two support arms 11 through a support shaft 5. The support shaft 5 includes an inner shaft 52 and a sleeve 51. The cross section of the inner shaft 52 is non-circular. The sleeve 51 has a middle hole adapted to the outer shape of the inner shaft 52. The two support arms 11 are respectively formed with mounting holes 12 for the inner shaft 52 to pass through. The mounting holes 12 are also adapted to the outer shape of the inner shaft 52. The two ends of the inner shaft 52 are fixed in the mounting holes 12 by a locking mechanism. The sleeve 51 is sleeved on the inner shaft 52 between the two support arms 11. The locking mechanism is provided on the inner shaft 52 between the two support arms 11. The tightening mechanism includes a retaining ring 521 and a screw 522. The screw 522 is locked on the inner shaft 52 after passing through the retaining ring 521. The retaining ring is larger than the aperture of the mounting hole 12, so that the inner shaft 52 is fixed in the mounting hole 12, and the operating hole connected to the mounting hole 12 is closed by the cover 523. The sleeve 51 is arranged in the support body 3. During assembly, the support body 3 with the sleeve 51 is placed between the two support arms 11. The inner shaft 52 passes through the mounting hole 12 from the outside of the support arm 11 and is inserted into the sleeve 51 to complete the support of the support body 11, and is locked and fixed by the locking mechanism, thereby facilitating the rapid assembly of the product.

[0031] Two crossbars 4 are symmetrically arranged on both sides of the upper part of the support body 3. The crossbar 4 can be rotatably arranged on the support body 3 between the use state and the folded state. The crossbar 4 in the use state is arranged to extend horizontally, and the crossbar 4 in the folded state is close to the support body 3. The support body 3 is provided with a receiving groove 31 for accommodating the crossbar 4 in the folded state. One end of the crossbar 4 is rotatably arranged on the support body 3 through a pivot shaft 41. The pivot shaft 41 is arranged obliquely so that the crossbar 4 in the folded state is inclined close to the side of the support body 3. A first limiting portion 42 is provided on the crossbar 4, and a second limiting portion 32 is provided on the support body 3. The first limiting portion 42 cooperates with the second limiting portion 32 to keep the crossbar 4 in the use state. In this way, during training, the crossbar 4 remains in the use state after being subjected to the upward force of the instep and cannot continue to rotate upward.

[0032] The support body 3 can be rotatable around the support shaft 5 and is arranged on the support shaft 5. A locking mechanism is arranged between the support shaft 5 and the support body 3. The locking mechanism allows the support body 3 to be rotatable or locked and unable to rotate. The locking mechanism includes a plurality of first positioning teeth 511 arranged in an arc on the sleeve 51, a swing arm 53 arranged on the support body 3 and can be swung relative to the first positioning teeth 511 through a pivot shaft 533, a pushing member 54 slidably arranged on the support body 3, a first spring 55 driving the swing arm 53 to swing toward the first positioning teeth 511, and a second spring 56 driving the pushing member 54 away from the swing arm 53. The swing arm 53 is provided with a second positioning tooth 532 that can mesh with the first positioning tooth 511. The pushing member 54 has an operating portion exposed outside the support body 3. Pressing the operating portion can drive the pushing member 54 to slide toward the swing arm 53 to push the swing arm 53 to swing. The pushing member 54 and the swing arm 53 are respectively provided with driving inclined surfaces 541 and 531 that contact each other.

[0033] The support arm 11 is provided with a plurality of positioning grooves 13 arranged in an arc shape, and the support body 3 is provided with a positioning ball 63 that can be embedded in the positioning groove 13 and a spring 62 that drives the positioning ball 63 to be embedded in the positioning groove 13. Specifically, the support body 3 is formed with a transversely extending through receiving hole 33, and the spring 62 is arranged in the receiving hole 33. One end of the receiving hole 33 is closed by a screw 61, and the other end is provided with the above-mentioned positioning ball 63. The positioning ball 63 presses against the inner side of the support arm 11 and is restricted in the receiving hole 33 and cannot escape. When the support body 3 rotates, the positioning ball 63 can be embedded in the positioning groove 13 and make a sound, and a certain resistance is generated to the rotation of the support body 3 to prevent the support body 3 from rotating too freely.

[0034] When the height of the cross bar 4 needs to be adjusted, the operating part is pressed to move the pushing member 54 inward, thereby driving the swing arm 53 to swing upward, so that the first positioning tooth 511 is separated from the second positioning tooth 532, and the support body 3 is in a rotatable state. The support body 3 is rotated to adjust to the height of the cross bar 4, and then the operating part is released. The pushing member 54 moves outward and resets under the action of the second spring 56, and the swing arm 53 swings downward under the action of the first spring 55 to engage the first positioning tooth 511 with the second positioning tooth 532, so that the support body 3 cannot rotate, thereby completing the height adjustment of the cross bar 4.

[0035] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. A sit-up aid, characterized in that: The invention comprises a base, a support body arranged on the base, and two cross bars arranged on both sides of the support body, wherein the cross bar can be rotatably arranged on the support body between a use state and a folded state, the cross bar in the use state is arranged to extend transversely, and the cross bar in the folded state is close to the support body, the support body is provided with a receiving groove for accommodating the cross bar in the folded state, one end of the cross bar is rotatably arranged on the support body through a pivot axis, the pivot axis is arranged to tilt so that the cross bar in the folded state is tilted and close to the side of the support body, a first limiting portion is arranged on the cross bar, and a second limiting portion is arranged on the support body, the first limiting portion cooperates with the second limiting portion to keep the cross bar in the use state, the support body can be rotatably adjusted around a horizontally extending axis or can be locked on the base, a transversely extending support shaft is arranged on the base, the support body can be rotatably arranged on the support shaft around the support shaft, a locking mechanism is arranged between the support shaft and the support body, the locking mechanism enables the support body to be rotatable or locked and cannot be rotated, and the locking mechanism includes a circular arc row arranged on the support shaft The invention relates to a plurality of first positioning teeth arranged in a row, a swing arm which can be swung relative to the first positioning teeth and is arranged on the support body, a pushing member which can be slidably arranged on the support body, a first spring which drives the swing arm to swing toward the first positioning teeth, and a second spring which drives the pushing member away from the swing arm. The swing arm is provided with a second positioning tooth which can mesh with the first positioning teeth. The pushing member can be operated to slide toward the swing arm to push the swing arm to swing. The base is provided with two support arms extending upward. The support shaft includes an inner shaft and a sleeve. The cross section of the inner shaft is non-circular. The sleeve has a middle hole which matches the outer shape of the inner shaft. The second positioning teeth are arranged on the sleeve. The two support arms are respectively formed with mounting holes for the inner shaft to pass through. The two ends of the inner shaft are installed in the mounting holes through a locking mechanism. The sleeve is sleeved on the inner shaft between the two support arms. The base is provided with a plurality of positioning grooves arranged in a circular arc. A positioning member which can be embedded in the positioning groove and a spring which drives the positioning member to be embedded in the positioning groove are movably arranged on the support body. When the support body rotates, the positioning member can be embedded in the positioning groove and make a sound. The base is provided with a vacuum suction cup.

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