CN217015227U

CN217015227U - Sit-up auxiliary device

Info

Publication number: CN217015227U
Application number: CN202220318284.9U
Authority: CN
Inventors: 徐剑
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-02-16
Filing date: 2022-02-16
Publication date: 2022-07-22
Anticipated expiration: 2032-02-16

Abstract

The utility model provides a sit up auxiliary device, includes base, stand, horizontal pole, and the vertical setting of stand is on the base, its characterized in that: the horizontal pole crosses the stand and can rotate around horizontal axis, and the both ends of horizontal pole are provided with annular location portion. When the exerciser takes exercise, the sole of the foot passes through the annular positioning part, the heel of the foot is supported on the ground, and the transverse rod can rotate around the horizontal axis, namely the annular positioning part can self-adapt to the characteristics of the foot of the exerciser to adjust the inclination angle, so that the foot of the exerciser is more comfortable.

Description

Sit-up auxiliary device

Technical Field

The present invention relates to a sit-up assist device.

Background

Chinese patent document CN213252822U discloses a sit-up apparatus, which comprises a base and a support column, wherein the support column is fixedly arranged on the base, a cross bar is arranged on the support column, a rack slidably connected with the support column is fixedly arranged on the cross bar, a gear is rotatably connected to the support column, and the gear is engaged with the rack; the gear is rotated to drive the rack to realize the lifting of the cross rod; the rack is fixedly provided with a shell cover, the shell cover is fixedly connected with an upright post, the cross rod is rotatably connected with the upright post, the rack also comprises a limiting post, a groove is arranged on the cross rod, the groove comprises an unfolding positioning groove, a containing positioning groove and a channel for connecting the two positioning grooves, the unfolding positioning groove and the containing positioning groove are vertically arranged, and when the limiting post is positioned in the unfolding positioning groove, the cross rod is in an unfolding state; when the limiting column is in the containing positioning groove, the cross rod is in a folded state, the cross rod is provided with an annular positioning portion for the sole to penetrate through, the cross rod can be folded and contained, the cross rod with the annular positioning portion cannot rotate around the horizontal axis to be adjusted, and the inclination angle of the annular positioning portion cannot be adjusted in a self-adaptive mode according to the foot characteristics of different exercisers.

Disclosure of Invention

The utility model aims to provide an auxiliary sit-up device capable of adaptively adjusting the inclination angle of an annular positioning part, aiming at the defects of the prior art.

The utility model provides a sit up auxiliary device, includes base, stand, horizontal pole, and the vertical setting of stand is on the base, its characterized in that: the horizontal pole crosses the stand and can rotate around horizontal axis, and the both ends of horizontal pole are provided with annular location portion. When the exerciser exercises, the sole penetrates through the annular positioning part, the heel is supported on the ground, and the transverse rod can rotate around the horizontal axis, namely the annular positioning part can self-adapt to the characteristics of the feet of the exerciser to adjust the inclination angle, so that the feet of the exerciser can be fixed more comfortably.

The stand includes outer tube and inner tube, and the outer tube is fixed to be set up on the base, and the inner tube sets up in the outer tube with adjustable rising, the horizontal pole crosses the inner tube and can rotate around horizontal axis, the outer tube both sides are formed with the hole of stepping down that supplies the horizontal pole to cross, and the outer tube lift adjustment relatively of inner tube, and the horizontal pole setting is on the inner tube, and the horizontal pole can carry out lift adjustment according to exerciser foot characteristics promptly to adapt to different exerciser's exercise demand.

Be provided with the telescopic setting element on the inner tube and order about the spring that the setting element stretches out, be formed with a plurality of locating holes of arranging along direction of height on the outer tube, the setting element can pass the locating hole in order to fix a position the position of inner tube, the regulation and the location of inner tube can be realized to setting element and spring cooperation, and specific when the horizontal pole height is adjusted to needs, press the setting element and make then upwards or the horizontal pole that moves down in the setting element indentation outer tube, make the setting element pass can realize the altitude mixture control of horizontal pole in other locating holes, operate very convenient and fast.

Be provided with the convex spacing portion of side direction on the annular location portion, be provided with the spacing hole that supplies spacing portion to pass on the inner tube, spacing hole is the elongated hole in order to restrict the horizontal pole is adjusted at certain angular range internal rotation, and the horizontal pole can only be at certain angular range internal rotation promptly, and the horizontal pole need not 360 degrees rotations under the normal condition and just can realize the self-adaptation regulation, sets up spacing portion and spacing hole and can block the horizontal pole excessive rotation to can provide the fixed resistance of exerciser foot.

The inner tube both sides are provided with smooth first terminal surface, annular location portion is provided with the smooth second terminal surface that leans on first terminal surface, and the cooperation of first terminal surface and second terminal surface can make the rotation of horizontal pole more reliable and more stable to prevent that the horizontal pole from rocking.

The limiting part protrudes from the first end face, and the limiting hole is formed in the second end face, so that the first end face and the second end face can be overlapped in a large area within the rotating range of the cross rod, the cross rod is more stable and reliable, and the cross rod is prevented from shaking.

The plane of the annular positioning part can rotate 10-20 degrees relative to the vertical direction, and the annular positioning part can be adaptive to exercisers with various foot characteristics within the angle range, so that the exercisers can obtain comfortable exercise experience.

The cross rod comprises two annular positioning parts and a rotating shaft connected between the two annular positioning parts, and the inner tube is provided with a shaft hole for supporting the rotating shaft to rotate, so that the cross rod can be rotatably supported on the inner tube.

The horizontal pole includes two annular location portion, pivot and two installation departments of setting at the pivot both ends, the installation department is formed with the throat slot, annular location portion be formed with the grafting portion of throat slot looks adaptation, annular location portion can dismantle the setting on the installation department through throat slot and grafting portion, the tank bottom of throat slot is formed with elastic bulge, annular location portion's grafting portion be formed with the positioning groove of elastic bulge looks adaptation, annular location portion can dismantle with the installation department through throat slot and grafting portion and be connected, can pull down two annular location portions when accomodating and packing, can be convenient for accomodate and pack of product, reduce the packing volume, convenient in the transportation of product.

The top of the upright post is provided with a counter and a sensor, the sensor is connected with the counter and can sense the action of a human body and feed back the action to the counter, and the counter can generate and display the exercise times according to signals fed back by the sensor.

The base comprises a sucker, a sucker pressing plate, a screw rod and a nut, the nut is rotatably connected with the bottom of the upright post, the lower end of the screw rod is fixedly connected with the top of the sucker, the upper end of the screw rod penetrates through the sucker pressing plate to be in threaded fit with the nut, the bottom of the nut is pressed on the top surface of the sucker pressing plate, the sucker pressing plate is provided with a pressing structure pressed on the peripheral top surface of the sucker, the screw rod can move up and down by rotating the nut to upwards pull the sucker to form negative pressure, when the base is used, the sit-up assisting device is firstly prevented on a smooth surface such as a ceramic tile, the bottom surface of the sucker is attached to the smooth surface and applies certain pressure to enable the sucker to be adsorbed on the smooth surface, then the nut is rotated to enable the screw rod to move upwards, the middle part of the sucker is pulled to move upwards to increase the negative pressure of the sucker, meanwhile, the nut applies downward force to the sucker pressing plate to the sucker, and finally acts on the periphery of the sucker to ensure the sealing performance between the sucker and the smooth surface, thereby improve the adsorption affinity of sucking disc, when needs pull down the sucking disc, then reverse rotation nut makes screw rod rebound release sucking disc, makes the sucking disc can easily pull down.

The nut upper end is formed with the convex connecting portion that makes progress, and the connecting portion peripheral face is formed with annular groove, the stand bottom is provided with the annular protruding edge of embedding in the annular groove, makes through annular groove and the cooperation of annular protruding edge the nut with stand bottom rotatable coupling.

The nut is characterized in that a connecting portion protruding upwards is formed at the upper end of the nut, the connecting portion is provided with a plurality of plug boards which are arranged circumferentially, hooks are formed at the upper ends of the plug boards, guide inclined planes are formed on the hooks, annular convex edges for supporting the hooks are arranged at the bottom of the upright column, and the nut is rotatably connected with the bottom of the upright column through the matching of the hooks and the annular convex edges. The connecting portion of the nut can be inserted from the lower port of the stand column in an extrusion mode, the hook is supported on the annular convex edge, and the guide inclined plane can enable the connecting portion to be inserted more smoothly, so that the nut is convenient to assemble on a product.

The sucking disc has elasticity, and the screw rod is rigid material, can pack the annular fixed part into the throat recess through the extrusion, is convenient in the equipment of product.

Annular location portion inner peripheral surface is provided with annular elastic pad, and annular elastic pad plays the cushioning effect, makes exerciser's foot more comfortable.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a perspective view of a first embodiment of the present invention.

Fig. 2 is an exploded view of the first embodiment of the present invention.

Fig. 3 is an exploded view of the cross bar and upright of the first embodiment of the present invention.

Fig. 4 is a rear view of the first embodiment of the present invention.

Fig. 5 is a sectional view taken along line B-B in fig. 4.

Fig. 6 is a sectional view taken along the line a-a in fig. 4.

Fig. 7 is an exploded view of the second embodiment of the present invention.

Fig. 8 is an exploded view of the cross bar and upright of the second embodiment of the present invention.

FIG. 9 is a perspective view of a second shaft and a mounting portion according to an embodiment of the present invention.

FIG. 10 is a perspective view of an annular positioning portion according to an embodiment of the present invention

FIG. 11 is a front view of a second cross bar of an embodiment of the present invention.

Fig. 12 is a cross-sectional view taken along line C-C in fig. 11.

FIG. 13 is an exploded view of the second base according to the embodiment of the present invention.

FIG. 14 is a perspective view of a second nut in accordance with an embodiment of the present invention.

Detailed Description

Embodiment one, as shown in fig. 1 to 6, a sit-up assisting device, including base 1, stand 2, horizontal pole 3, stand 2 is vertical to be set up on base 1, horizontal pole 3 crosses stand 2 and can rotate around horizontal axis, the both ends of horizontal pole 3 are provided with annular location portion 31, during the exercise, the sole passes annular location portion 31, the heel supports subaerial, because horizontal pole 3 can rotate around horizontal axis, but inclination is adjusted to annular location portion 31 self-adaptation exerciser foot characteristics to make the fixed of exerciser foot more comfortable.

The base 1 comprises a sucker 11, a sucker pressing plate 12, a screw 13 and a nut 14, the nut 14 is rotatably connected with the bottom of the upright post 2, the sucker pressing plate 12 is in a disc shape with a middle hole 121, the sucker pressing plate 12 is provided with an annular pressing edge 122 pressing on the top surface of the periphery of the sucker 11, an external thread is formed on the periphery of the upper section of the screw 13, the lower end of the screw 13 is fixedly connected with the top of the sucker 11, the upper end of the screw passes through the sucker pressing plate 12 and is in threaded fit with the nut 14, the bottom of the nut 14 is pressed on the top surface of the sucker pressing plate 12, the screw 14 can move up and down by rotating the nut 14 to pull the sucker 11 upwards to form a negative pressure or move downwards to release the sucker 11, when in use, the sit-up assisting device is firstly prevented on a smooth surface, such as a ceramic tile, the bottom surface of the sucker 11 is attached to the smooth surface and applies a certain pressure to enable the sucker 11 to be adsorbed on the smooth surface, then the screw 13 moves upwards by rotating the nut 14, in the process, the screw 13 pulls the middle of the sucker 11 to move upwards to increase the negative pressure of the sucker 11, meanwhile, the nut 14 applies a downward force to the sucker pressing plate 12 and finally acts on the periphery of the sucker 11 to ensure the sealing performance between the sucker 11 and the smooth surface, so that the adsorption force of the sucker 11 is improved, and when the sucker 11 needs to be detached, the nut 14 is rotated reversely to enable the screw 13 to move upwards to release the sucker 11, so that the sucker 11 can be detached easily. The lower end of the screw 13 is formed with an annular fixing part 131 protruding outwards, the top surface of the suction cup 11 is formed with a necking groove 111 matched with the annular fixing part 131, the screw 13 and the suction cup 11 can be fixedly connected through the annular fixing part 131 and the necking groove 111, and the screw 13 is made of rigid material, so that the annular fixing part 131 can be installed in the necking groove 111 through extrusion, and the assembly of a product is facilitated. In order to increase the connection strength between the suction cup 11 and the screw 13, glue may be applied between the annular fixing portion 131 and the reduced groove 111 to strengthen the connection.

The upright post 2 comprises an outer tube 21 and an inner tube 22, the outer tube 21 is fixedly arranged on the base 1, the inner tube 22 is arranged in the outer tube 21 in a lifting and adjusting manner, a connecting part 141 protruding upwards is formed at the upper end of the nut 14, an annular groove 1411 is formed on the outer peripheral surface of the connecting part 141, an annular convex edge 216 embedded in the annular groove 1411 is formed at the bottom of the outer tube 21, the nut 14 and the bottom of the outer tube 21 can be rotatably connected through the matching of the annular groove 1411 and the annular convex edge 216, the outer tube 21 is formed by oppositely buckling an outer tube front shell 21a and an outer tube rear shell 21b, the outer tube front shell 21a and the outer tube rear shell 21b are locked and fixed through bolts after being buckled, and an upper decoration ring 213 and a lower decoration ring 212 are respectively sleeved at the upper end and the lower end for decorating and reinforcing the connection of the outer tube front shell 21a and the outer tube rear shell 21 b; the inner tube 22 is also formed by relatively engaging an inner tube front housing 22a and an inner tube rear housing 22b, and the inner tube front housing 22a and the inner tube rear housing 22b are connected by bolt locking.

Horizontal pole 3 crosses inner tube 22 and can rotate around the horizontal axis, and outer tube 21 both sides are formed with the hole of stepping down 214 that supplies horizontal pole 3 to cross, and the hole of stepping down 214 is the elongated hole that extends from top to bottom, and inner tube 22 outer tube 21 lift adjustment relatively, and horizontal pole 3 sets up on inner tube 22, and horizontal pole 3 can go up and down to adjust according to exerciser's foot characteristics promptly to adapt to different exerciser's exercise demand. The horizontal pole 3 includes two annular location portions 31 and connects the pivot 32 between two annular location portions 31, and inner tube 22 is formed with the pivot pivoted shaft hole 225 of support pivot, can make horizontal pole 3 rotatable support on inner tube 22 like this, forms the convex rib 321 that extends along its length direction on the pivot 32, is formed with the space c that holds rib 321 in the inner tube 22, and rib 321 can improve the intensity of pivot 32, prevents that pivot 32 from warping or damaging.

The inner tube 22 is provided with a retractable positioning element 51 and a spring 52 for driving the positioning element 51 to extend, the positioning element 51 is a hollow cylinder, the inner tube front housing 22a is provided with a mounting hole 222 for the front section 511 of the positioning element 51 to pass through, the rear section 512 of the positioning element 51 has a diameter larger than that of the mounting hole 222 and can receive one end of the spring 52, the other end of the spring 52 is supported on the inner tube rear housing 22b, and the inner tube rear housing 22b is formed with a groove for receiving the end of the spring 52. Three positioning holes 211 arranged along the height direction are formed in the outer tube 21, the front section 511 of the positioning element 51 can pass through the positioning holes to position the positions of the inner tubes, the positioning element 51 and the spring 52 are matched to realize the adjustment and the positioning of the inner tubes 22, specifically, when the height of the cross rod 3 needs to be adjusted, the front section 511 of the positioning element 51 is pressed to enable the positioning element 51 to retract into the outer tube 21 and then move the cross rod 3 upwards or downwards, the front section 511 of the positioning element 51 can pass through other positioning holes 211 to realize the height adjustment of the cross rod 3, and the operation is very convenient and fast.

Be provided with the convex spacing portion 313 of side direction on annular location portion 31, this spacing portion 313 is cylindrical, is provided with the spacing hole 223 that supplies spacing portion to pass on the inner tube 22, and spacing hole 223 specifically makes annular location portion 31 place plane relative vertical direction rotate 15 degrees for elongated hole is adjusted in certain angle within range rotation in order to restrict horizontal pole 3, and annular location portion 31 can the exerciser of the various foot characteristics of self-adaptation in this angle within range, makes the exerciser obtain comfortable exercise and experiences. The two sides of the inner tube 22 are formed with positioning portions 221 protruding outwards, the positioning portions 221 are matched with the yielding holes 214, the positioning portions 221 are formed with flat first end faces 224, the annular positioning portions 31 are provided with flat second end faces 312 attached to the first end faces 224, the first end faces 224 and the second end faces 312 are matched to enable the rotation of the cross rods 3 to be stable and reliable, the cross rods are prevented from shaking, the limiting portions 313 protrude from the first end faces 224, and the limiting holes 223 are formed in the second end faces 312, so that the rotation range of the cross rods 3 can be guaranteed, the first end faces 224 and the second end faces 312 have large-area overlapping, the cross rods 3 are enabled to be stable and reliable, and the cross rods 3 are prevented from shaking.

The top of the outer tube 21 is provided with a counter and a sensor, the top of the outer tube 21 is provided with an installation shell 4 for installing the sensor and the counter, the peripheral surface of the top of the outer tube 21 is provided with a clamping groove 215, the clamping groove 215 is opened on the top surface of the outer tube 21 and extends along the peripheral surface of the outer tube 21, the inner wall of the installation shell 4 is provided with a clamping block 41 capable of being buckled into the clamping groove 215, and the installation shell 4 and the outer tube 21 are detachably connected through the clamping groove 215 and the clamping block 41. The sensor is connected with the counter, and the sensor can respond to human action and feed back to the counter, and the counter can be according to the signal generation of sensor feedback and take exercise number of times and show, and infrared ray sensor can be chooseed for use to specific sensor.

The inner peripheral surface of the annular positioning portion 31 is provided with an annular elastic pad 311, a buffer channel a extending along the length direction of the annular elastic pad 311 is formed on the inner side of the annular elastic pad 311, two annular clamping grooves b with opposite notches are formed on the outer side of the annular elastic pad 311, the annular positioning portion 31 is composed of a first shell 31a and a second shell 31b which are buckled oppositely, convex edges 314 embedded into the two annular clamping grooves b are formed on the inner sides of the first shell 31a and the second shell 31b respectively, during assembly, the annular elastic pad 311 is firstly installed between the first shell 31a and the second shell 31b, the convex edges 314 are embedded into the annular clamping grooves b, and then the first shell 31a and the second shell 31b are locked through bolts.

The annular elastic pad 311 is made of silica gel or other polymer with a certain spring, and can play a role in buffering, so that the feet of the exerciser are more comfortable.

Second embodiment, referring to fig. 7 to 14, the second embodiment is substantially the same as the first embodiment, and is mainly different from the specific structure of the cross bar 3 and the base 1, the specific cross bar 3 includes two annular positioning portions 31, a rotating shaft 32 and two mounting portions 33 disposed at two ends of the rotating shaft 32, the rotating shaft 32 and the two mounting portions 33 are integrally injection molded, the mounting portions 33 extend along the vertical direction, the mounting portions 33 form a flat first combining surface 335, the first combining surface 335 forms a necking slot 334 extending along the length direction thereof, the lower end of the necking slot 334 penetrates through the lower end of the mounting portion 33 to form an insertion opening, the cross section of the necking slot 334 is T-shaped, the annular positioning portion 31 forms a second combining surface 316 combined with the first combining surface 335, the second combining surface 316 forms an insertion portion 315 matched with the necking slot 334, the cross section of the insertion portion 315 is also T-shaped, the annular positioning part 31 is detachably arranged on the mounting part 33 through a necking slot 334 and an inserting part 315, an elastic protrusion 333 is formed at the bottom of the necking slot 334, a positioning groove 317 matched with the elastic protrusion 333 is formed at the inserting part 315 of the annular positioning part 31, an elastic plate 332 forming the bottom of the necking slot 334 is formed at the specific mounting part 33, one end of the elastic plate 332 is fixed and the other end is free, the elastic protrusion 333 is formed at the free end of the elastic plate 332, the specific elastic protrusion 333 is hemispherical, after the inserting part 315 is inserted into the necking slot 334 through the inserting hole of the annular positioning part 31, the elastic protrusion 333 is embedded into the positioning groove by the elastic drive of the elastic plate 332, so that the annular positioning part 31 is fixed on the mounting part 33, and because the elastic protrusion 333 is hemispherical, the elastic protrusion 333 can be separated from the positioning groove 317 after a certain downward force is applied to the inserting part 315, the annular positioning portion 31 can be detached, and in addition, since the mounting portion 33 is added compared with the second embodiment, a limiting portion 331 for limiting the position is arranged on the mounting portion 33, and the limiting portion 331 cooperates with the limiting hole 223 to limit the rotation angle of the cross bar 3. The annular positioning part 31 is detachably connected with the mounting part 33 through the necking slot 334 and the insertion part 315, the two annular positioning parts 31 can be detached when being stored and packaged, the storage and the packaging of products can be facilitated, the packaging volume is reduced, and the transportation of the products is facilitated.

The upper end of a nut 14 of the specific base is formed with a connecting part protruding upwards, the connecting part comprises a plurality of plug boards 142 arranged circumferentially and a board body 144 located between two adjacent plug boards 142, the board body 144 and the plug boards 142 enclose an annular connecting part, the upper end of the plug boards 142 is formed with a hook 143, the hook 143 is formed with a guide inclined surface 1431, the bottom of the outer tube 21 is provided with an annular convex edge 216 supporting the hook 143, the nut 14 and the bottom of the outer tube 21 can be rotatably connected through the cooperation of the hook 143 and the annular convex edge 216, the connecting part of the nut 14 can be inserted from the lower port of the outer tube 21 in an extrusion mode, the hook 143 is supported on the annular convex edge 216, and the guide inclined surface 1431 can enable the insertion of the connecting part to be smoother, compared with the first embodiment, the embodiment is more convenient for product assembly. In addition, the diameter of the sucker pressing plate 12 of the base of the embodiment is larger than that of the sucker 11, a plurality of pressing plates 123 matched with the peripheral top surface of the sucker 11 are formed at the bottom of the sucker pressing plate 12, the pressing plates 123 are arranged at intervals on the circumference, and the pressing plates 123 and the annular pressing edge 122 have the same effect and are pressing structures acting on the peripheral top surface of the sucker. In order to facilitate the operation of the nut 14, the outer peripheral surface of the nut 14 is formed with a plurality of operating portions 145 that project outward.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the utility model, which is defined by the appended claims and their equivalents and modifications within the scope of the description.

Claims

1. The utility model provides a sit up auxiliary device, includes base (1), stand (2), horizontal pole (3), and stand (2) vertical setting is on base (1), its characterized in that: the cross rod (3) transversely penetrates through the upright post (2) and can rotate around a horizontal axis, and the two ends of the cross rod (3) are provided with annular positioning parts (31).

2. A sit-up aid as claimed in claim 1, wherein: stand (2) include outer tube (21) and inner tube (22), and outer tube (21) are fixed to be set up on base (1), and inner tube (22) liftable ground sets up in outer tube (21), cross inner tube (22) and can rotate around the horizontal axis in horizontal axis is crossed in horizontal pole (3), outer tube (21) both sides are formed with the hole of stepping down (214) that supplies horizontal pole (3) to cross.

3. A sit-up assist device according to claim 2, wherein: the inner tube (22) is provided with a telescopic positioning piece (51) and a spring (52) for driving the positioning piece (51) to extend out, a plurality of positioning holes (211) arranged along the height direction are formed in the outer tube (21), and the positioning piece (51) can penetrate through the positioning holes (211) to position the position of the inner tube (22).

4. A sit-up assist device according to claim 2, wherein: the annular positioning part (31) is provided with a laterally convex limiting part (313), the inner tube (22) is provided with a limiting hole (223) for the limiting part (313) to pass through, and the limiting hole (223) is a long hole to limit the rotation and adjustment of the cross rod (3) within a certain angle range.

5. A sit-up aid according to claim 4, wherein: the two sides of the inner pipe (22) are provided with flat first end faces (224), and the annular positioning portion (31) is provided with flat second end faces (312) attached to the first end faces (224).

6. A sit-up aid according to claim 5, wherein: the limiting part (313) protrudes from the first end face (224), and the limiting hole (223) is formed in the second end face (312).

7. A sit-up aid according to claim 4, wherein: the plane of the annular positioning part (31) can rotate 10-20 degrees relative to the vertical direction.

8. An sit-up aid according to any one of claims 2 to 7, wherein: the cross bar (3) comprises two annular positioning parts (31) and a rotating shaft (32) connected between the two annular positioning parts (31), and a shaft hole (225) for supporting the rotating shaft (32) to rotate is formed in the inner pipe (22).

9. A sit-up aid according to any one of claims 2 to 7, wherein: horizontal pole (3) are including two annular location portion (31), pivot (32) and two installation department (33) of setting at the pivot both ends, and installation department (33) are formed with throat slot (334), and annular location portion (31) are formed with grafting portion (315) with throat slot (334) looks adaptation, and annular location portion (31) can be dismantled through throat slot (334) and grafting portion (315) and set up on installation department (33), the tank bottom of throat slot (334) is formed with elastic bulge (333), grafting portion (315) of annular location portion (31) are formed with positioning groove (317) with elastic bulge looks adaptation.

10. A sit-up aid according to any one of claims 1 to 7, wherein: the top of the upright post (2) is provided with a counter and a sensor, the sensor is connected with the counter, the sensor can sense the action of a human body and feed back the action to the counter, and the counter can generate and display the exercise times according to signals fed back by the sensor.

11. A sit-up aid according to any one of claims 1 to 7, wherein: base (1) includes sucking disc (11), sucking disc clamp plate (12), screw rod (13) and nut (14), nut (14) with stand (2) bottom rotatable coupling, screw rod (13) lower extreme and sucking disc (11) top fixed connection upper end pass sucking disc clamp plate (12) and nut (14) screw-thread fit, and nut (14) bottom is pressed at sucking disc clamp plate (12) top surface, and sucking disc clamp plate (12) have and press the compact structure at sucking disc (11) periphery top surface, can make screw rod (13) reciprocate through swivel nut (14).

12. A sit-up aid according to claim 11, wherein: the nut (14) upper end is formed with upwards protruding connecting portion (141), and connecting portion (141) peripheral face is formed with annular groove (1411), stand (2) bottom is provided with the annular protruding edge (216) of embedding in annular groove (1411), makes nut (14) with stand (2) bottom rotatable coupling through annular groove (1411) and annular protruding edge (216) cooperation.

13. A sit-up aid according to claim 11, wherein: the nut is characterized in that a connecting part (141) protruding upwards is formed at the upper end of the nut (14), the connecting part (141) is provided with a plurality of plug boards (142) arranged circumferentially, a hook (143) is formed at the upper end of each plug board, a guide inclined plane (1431) is formed on each hook (143), an annular convex edge (216) for supporting the hooks (143) is arranged at the bottom of the upright post (2), and the nut (14) and the bottom of the upright post (2) are rotatably connected through the matching of the hooks and the annular convex edges (216).

14. A sit-up aid according to claim 11, wherein: the lower end of the screw rod (13) is provided with an annular fixing part (131) protruding outwards, and the top surface of the sucker (11) is provided with a necking groove (111) matched with the annular fixing part (131).

15. A sit-up aid according to any one of claims 1 to 7, wherein: the inner circumferential surface of the annular positioning part (31) is provided with an annular elastic pad (311).