Sit-up assist device

Abstract

The utility model provides a sit-up assisting device. The sit-up assisting device comprises a base, a supporting cylinder and a lifting rod. A supporting cylinder is arranged at the top of the base, a suction cup piece is arranged at the bottom of the base, a transverse rod piece is arranged at the top end of the lifting rod, and the bottom end of the lifting rod is arranged in the supporting cylinder in a liftable mode. A bolt rod elastically arranged on the lifting rod can telescopically penetrate through one bolt hole in the cylinder wall of the supporting cylinder; and the soft rubber key covers each bolt hole. And the stress supporting area of the base on two feet is large. A user presses a corresponding point position on the soft rubber key to enable the bolt rod to retract backwards and be separated from one bolt hole in the wall of the supporting barrel, and the bottom end of the lifting rod moves upwards or downwards in the supporting barrel to enable the bolt rod to correspondingly extend forwards to penetrate through different bolt holes in the wall of the supporting barrel. Therefore, a user can freely adjust the cross rod piece at the top end of the lifting rod to be at different heights to adapt to two feet for use, and the bolt rod is stressed to retract in a mode of pressing the soft rubber key, so that the bolt rod is prevented from hurting hands.

Description

Technical Field

[0001] The utility model relates to the technical field of exercise equipment, in particular to a sit-up assistor. Background Art

[0002] A sit-up assistor is a fitness equipment, mainly used to help users complete sit-up movements more easily, and can train the abdomen and other muscle groups through different movements.

[0003] Currently, a sit-up assistor has a cross bar arranged at both the upper and lower parts. The user's feet are placed between the upper and lower cross bars and are pressed and fixed. During the user's sit-up process, the lower cross bar is prone to be broken due to the small stress area, so the firmness of supporting the feet is insufficient; and when the user presses the plug rod with the hand to make the plug rod located in different plug holes, so as to adjust the height of the upper cross bar, the user's hand directly contacts and presses the plug rod. Since the plug rod is made of a relatively hard material, it causes discomfort to the hand, resulting in low user comfort. Content of the Utility Model

[0004] The utility model aims to provide a sit-up assistor to solve the problems in the above background art that a sit-up assistor has a cross bar arranged at both the upper and lower parts. The user's feet are placed between the upper and lower cross bars and are pressed and fixed. During the user's sit-up process, the lower cross bar is prone to be broken due to the small stress area, so the firmness of supporting the feet is insufficient; and when the user presses the plug rod with the hand to make the plug rod located in different plug holes, so as to adjust the height of the upper cross bar, the user's hand directly contacts and presses the plug rod. Since the plug rod is made of a relatively hard material, it causes discomfort to the hand, resulting in low user comfort.

[0005] The technical solution adopted by the utility model to solve the technical problems is as follows: A sit-up assistor includes a base, a support cylinder and a lifting rod; a support cylinder is provided at the top of the base, a suction cup member is provided at the bottom of the base, a cross bar member is provided at the top end of the lifting rod, and the bottom end of the lifting rod is vertically and movably arranged inside the support cylinder; a plug rod is elastically arranged on the lifting rod, a plurality of plug holes are sequentially opened in the vertical direction on the cylinder wall of the support cylinder, and the plug rod elastically arranged on the lifting rod can telescopically penetrate through one of the plug holes on the cylinder wall of the support cylinder; a soft rubber button is provided on the outer surface of the support cylinder, and the soft rubber button covers each plug hole.

[0006] In some embodiments, a mounting box is fixed inside the lifting rod by screws, a spring piece is installed in the mounting box, the spring piece is connected to the plug rod, and the plug rod extends from the inside of the mounting box to the outside of the lifting rod to telescopically penetrate through the plug hole.

[0007] In some embodiments, the suction cup member includes two suction cups, and both of the two suction cups are respectively connected to two sides of the bottom of the base through compression springs; accommodation spaces are respectively provided on two sides inside the base, inner grooves are respectively provided on the bottom walls of the accommodation spaces on two sides inside the base, through holes for movement are respectively formed on two sides of the outer surface of the base, the through holes for movement on two sides of the outer surface of the base are respectively communicated with the accommodation spaces on two sides inside the base, handle assemblies are respectively provided in the accommodation spaces on two sides inside the base, the two handle assemblies are respectively located in the inner grooves of the accommodation spaces on two sides inside the base and respectively penetrate through the through holes for movement on two sides of the outer surface of the base to respectively extend to two sides outside the base, and the two handle assemblies are respectively in transmission connection with the two suction cups.

[0008] In some embodiments, the handle assembly includes a handle rod, a jacking shell, a lifting shell and a connecting rod. The jacking shell is located in the inner groove of the accommodation space inside the base. One end of the handle rod is integrally connected to the jacking shell, and the other end of the handle rod penetrates through the through hole for movement on one side of the outer surface of the base to extend to one side outside the base. The lifting shell is located inside the top of the jacking shell. A circumferential concave-convex top wall is provided at the top of the jacking shell, and a circumferential concave-convex bottom wall is provided on the outer surface of the lifting shell. The concave-convex top wall provided at the top of the jacking shell is fitted with the concave-convex bottom wall provided on the outer surface of the lifting shell. A plurality of concave arc grooves are annularly distributed on the concave-convex top wall, and arc protrusions with the same number as the concave arc grooves are annularly distributed on the concave-convex bottom wall. Each of the concave arc grooves on the concave-convex top wall is respectively fitted with each of the arc protrusions on the concave-convex bottom wall. The bottom of the lifting shell is connected with the connecting rod, and the lifting shell is connected to the suction cup through the connecting rod penetrating through the bottom walls of the jacking shell and the inner groove. Limiting blocks are respectively provided on two sides of the inner surface of the jacking shell, and limiting grooves are respectively formed on two sides of the outer surface of the lifting shell. The limiting blocks on two sides of the inner surface of the jacking shell are respectively located in the limiting grooves on two sides of the outer surface of the lifting shell.

[0009] In some embodiments, a metal disk is fixedly wrapped inside the suction cup, and the connecting rod is connected to the suction cup by being fixed to the metal disk; the compression spring abuts between the metal disk inside the suction cup and the bottom of the base.

[0010] In some embodiments, pulling strips are respectively provided on the sides of the two suction cups.

[0011] In some embodiments, the cross bar member includes a first cross bar and a second cross bar, and the first cross bar and the second cross bar are respectively provided on two sides of the top end of the lifting rod.

[0012] In some embodiments, a first oil groove is provided on the concave-convex top wall at the top end of the jacking shell, and a second oil groove is provided on the bottom end surface of the jacking shell; a flat gasket is provided in the inner groove, and the flat gasket abuts against the bottom end surface of the jacking shell.

[0013] In some embodiments, locking marks and unlocking marks are respectively printed at both ends of the base corresponding to each of the transfer holes on the outer surface of the base.

[0014] In some embodiments, the inside of the support cylinder communicates with the inside of the base. Limit hooks are provided on both outer sides of the bottom end of the lifting rod, and limit grooves are provided on both inner sides of the bottom end of the support cylinder. When the lifting rod rises to the limit inside the support cylinder, the limit hooks on both outer sides of the bottom end of the lifting rod are respectively hooked with the limit grooves on both inner sides of the bottom end of the support cylinder.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] In the present utility model, when using, the two feet are respectively placed on both sides of the top of the base and the two feet are hooked on the cross bar at the top of the lifting rod. The base has a large force-bearing support area for the two feet, so it can stably support the user's feet. The user presses the corresponding points on the soft rubber button to retract the plug rod from one of the plug holes on the barrel wall of the support cylinder, and moves the bottom end of the lifting rod up or down inside the support cylinder to make the plug rod extend forward correspondingly through different plug holes on the barrel wall of the support cylinder, so as to realize that the user can freely adjust the cross bar at the top of the lifting rod to be at different heights to adapt to the use of the feet, which has the advantages of high efficiency and convenience. And pressing the soft rubber button to make the plug rod retract under force avoids the user's hand directly contacting the plug rod, thus preventing the plug rod from pinching the hand. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the sit-up assistor from the front view angle;

[0018] Figure 2 It is a schematic structural diagram of the sit-up assistor from the rear view angle;

[0019] Figure 3 It is a schematic structural diagram of the soft rubber button of the sit-up assistor in a split state;

[0020] Figure 4 It is a schematic structural diagram of the lifting rod of the sit-up assistor;

[0021] Figure 5 It is a schematic structural diagram of the insertion rod installed in the installation box of the sit-up assistor;

[0022] Figure 6 It is a schematic structural diagram of the installation box of the sit-up assistor and the insertion rod in a split state;

[0023] Figure 7 This is a structural diagram of the sit-up assist device in which the lifting rod and the support tube are separated;

[0024] Figure 8 This is a schematic diagram of the structure of the sit-up assist device from the bottom end perspective;

[0025] Figure 9 This is a structural diagram of the sit-up assist device in its split state;

[0026] Figure 10 This is a structural diagram of the sit-up assist device in which the metal disc and the suction cup are separated;

[0027] Figure 11 This is a structural diagram of the sit-up assist device with the handle assembly connected to the suction cup;

[0028] Figure 12 This is a structural diagram of the handle assembly of the sit-up assist device in a separated state;

[0029] Figure 13 This is a structural diagram of the sit-up assist device from the bottom end view of the lifting shell.

[0030] Description of reference numerals:

[0031] 100. Sit-up assist device; 10. Base; 102. Shift hole; 103. Accommodation space; 1031. Inner groove; 10311. Flat pad; 1041. Lock mark; 1042. Unlock mark; 20. Support tube; 201. Soft rubber button; 202. Latch hole; 203. Limit groove; 30. Lifting rod; 301. Crossbar; 3011. First crossbar; 3012. Second crossbar; 302. Limit hook; 40. Suction cup; 401. Suction cup; 4011 , pull rod; 4012, metal plate; 4013, compression spring; 50, handle assembly; 501, handle rod; 502, lifting shell; 5021, concave and convex top wall; 50211, concave arc groove; 5022, limit block; 5023, first oil groove; 5024, second oil groove; 503, lifting shell; 5031, concave and convex bottom wall; 50311, arc protrusion; 5032, limit groove; 504, connecting rod; 601, installation box; 602, spring sheet; 603, latch rod. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] In addition, in the present utility model, the descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0034] Please refer to Figures 1 to 13 As shown, the present utility model provides the following technical solution: a sit-up assistor 100, including a base 10, a support cylinder 20 and a lifting rod 30; a support cylinder 20 is provided on the top of the base 10, a suction cup member 40 is provided on the bottom of the base 10, a cross bar member 301 is provided at the top end of the lifting rod 30, and the bottom end of the lifting rod 30 is vertically and movably arranged inside the support cylinder 20; a latch rod 603 is elastically arranged on the lifting rod 30, a plurality of latch holes 202 are sequentially formed in the cylinder wall of the support cylinder 20 from top to bottom, and the latch rod 603 elastically arranged on the lifting rod 30 can telescopically penetrate through one of the latch holes 202 in the cylinder wall of the support cylinder 20; a soft rubber button 201 is provided on the outer surface of the support cylinder 20, and the soft rubber button 201 covers each latch hole 202.

[0035] In the sit-up assisting device 100 provided in this embodiment, when the user uses the sit-up assisting device 100, the user first sucks the suction cup member 40 at the bottom of the base 10 to the ground, thereby fixing the sit-up assisting device 100 to the ground. Then, the user lies down and places both feet on the top sides of the base 10 respectively, and hooks both feet on the cross bar member 301 at the top of the lifting rod 30, so that the user's feet are limited and fixed. When the user does sit-ups, the feet will not be lifted up due to the cooperation and limitation of the cross bar member 301 and the base 10. When the user needs to disassemble the sit-up assisting device 100 from the ground, the user can release the pressure of the suction cup member 40 at the bottom of the base 10 to cancel the fixation to the ground. When the user needs to adjust the height of the crossbar 301 at the top of the lifting rod 30, the user can hold the lifting rod 30 with one hand and press the corresponding point on the soft rubber button 201 with the other hand to retract the latch rod 603 that passes through one of the latch holes 202 on the wall of the support tube 20 and disengage the latch hole 202. Then, the user can move the bottom end of the lifting rod 30 up or down linearly inside the support tube 20, so that the latch rod 603 on the lifting rod 30 moves up or down to correspond to the different latch holes 202 that extend forward through the wall of the support tube 20, thereby adjusting the height of the lifting rod 30 to different levels, and further adjusting the crossbar 301 at the top of the lifting rod 30 to different levels for the user's feet to use. In the present utility model, the user places the two feet on both sides of the top of the base 10 and hooks the two feet on the crossbar 301 at the top of the lifting rod 30 for use. The base 10 has a large force support area for the two feet, which can provide a stable support for the user's feet. The user presses the corresponding point on the soft rubber button 201 to retract the latch rod 603 from one of the latch holes 202 on the wall of the support tube 20, and moves the bottom end of the lifting rod 30 up or down inside the support tube 20 to make the latch rod 603 extend forward to correspond to different latch holes 202 on the wall of the support tube 20, thereby allowing the user to freely adjust the cross bar 301 at the top of the lifting rod 30 to different heights to adapt to the use of both feet. It has the advantages of efficiency and convenience, and pressing the soft rubber button 201 causes the latch rod 603 to retract under force, avoiding direct contact between the user's hand and the latch rod 603, thereby preventing the latch rod 603 from scratching the hand.

[0036] See also Figures 3 to 7 As shown, in some embodiments, the internal screws of the lifting rod 30 are fixed with a mounting box 601, a spring sheet 602 is installed in the mounting box 601, the spring sheet 602 is connected to a latch rod 603, and the latch rod 603 extends from the inside of the mounting box 601 to the outside of the lifting rod 30 and can be retracted to pass through the latch hole 202.

[0037] During specific implementation: A spring piece 602 is installed inside the mounting box 601 within the lifting rod 30. The interior of the mounting box 601 provides a space for the spring piece 602 to deform. The spring piece 602 is connected to the latch rod 603. When the user presses the soft rubber button 201 and the latch rod 603 retracts into the latch hole 202, the spring piece 602 is compressed and contracts to support the retraction of the latch rod 603. When the latch rod 603 extends forward to correspondingly penetrate through the latch hole 202, the spring piece 602 releases its stored energy and expands to support the latch rod 603 to extend forward and penetrate through the latch hole 202. Through such a setting, the spring piece 602 can effectively support the retraction and extension of the latch rod 603.

[0038] Please refer to Figure 2 , Figure 9 and Figure 10 As shown in

[0039] During specific implementation: When the user needs to use the sit-up assistor 100, the user places the two suction cups 401 at the bottom of the base 10 in contact with the ground, and then sequentially rotates the two handle assemblies 50 extending on both sides of the outside of the base 10 in one direction by hand, so that the two handle assemblies 50 respectively drive the two suction cups 401 to bulge to form internal pressure and suck to the ground, thus completing the fixation of the base 10 to the ground. Then the user can use the sit-up assistor 100 to do sit-up exercises. When the user needs to remove the fixation of the sit-up assistor 100 from the ground, the two handle assemblies 50 extending on both sides of the outside of the base 10 are rotated in the other direction by hand in sequence, so that the two handle assemblies 50 respectively drive the two suction cups 401 to press down to be completely flat against the ground to release the internal pressure, so that the two suction cups 401 are disengaged from the ground suction, thus completing the removal of the fixation of the base 10 to the ground. Then the user can put away the sit-up assistor 100. Through such a setting, the user can rotate the two handle assemblies 50 by hand respectively to drive the two suction cups 401 to suck or disengage from the ground respectively.

[0040] Please refer to Figure 2 、 Figure 9 、 Figure 11 and Figure 12 As shown, in some embodiments, the handle assembly 50 includes a handle rod 501, a jacking housing 502, a lifting housing 503, and a connecting rod 504. The jacking housing 502 is located in the inner groove 1031 of the inner accommodation space 103 of the base 10. One end of the handle rod 501 is integrally connected to the jacking housing 502, and the other end of the handle rod 501 extends outside the base 10 through the access hole 102 on one side of the outer surface of the base 10. The lifting housing 503 is located at the top inside the jacking housing 502. The top end of the jacking housing 502 is provided with a circumferential concave-convex top wall 5021, and the outer surface of the lifting housing 503 is provided with a circumferential concave-convex bottom wall 5031. The concave-convex top wall 5021 provided at the top end of the jacking housing 502 is fitted with the concave-convex bottom wall 5031 provided on the outer surface of the lifting housing 503. A number of concave arc grooves 50211 are circumferentially distributed on the concave-convex top wall 5021, and the same number of arc protrusions 50311 as the concave arc grooves 50211 are circumferentially distributed on the concave-convex bottom wall 5031. Each concave arc groove 50211 on the concave-convex top wall 5021 is respectively fitted with each arc protrusion 50311 on the concave-convex bottom wall 5031. The bottom of the lifting housing 503 is connected with a connecting rod 504, and the lifting housing 503 is connected to the suction cup 401 through the connecting rod 504 passing through the bottom wall of the jacking housing 502 and the inner groove 1031. Limiting blocks 5022 are respectively provided on both sides of the inner surface of the jacking housing 502, and limiting grooves 5032 are respectively opened on both sides of the outer surface of the lifting housing 503. The limiting blocks 5022 on both sides of the inner surface of the jacking housing 502 are respectively located in the limiting grooves 5032 on both sides of the outer surface of the lifting housing 503.

[0041] During specific implementation: When the user manually rotates the handle assembly 50 in one direction to drive the suction cup 401 to press down and disengage from the ground, the user can drive the lifting shell 502 to rotate in one direction by holding the handle rod 501. When the lifting shell 502 rotates in one direction, the concave structure of the concave and convex top wall 5021 engages with the convex structure of the concave and convex bottom wall 5031 on the lifting shell 503. Thus, when the convex structure of the concave and convex top wall 5021 on the lifting shell 502 contacts the convex structure of the concave and convex bottom wall 5031 on the lifting shell 503, the state where the lifting shell 502 lifts the lifting shell 503 changes to a state where the concave structure of the concave and convex top wall 5021 on the lifting shell 502 engages with the convex structure of the concave and convex bottom wall 5031 on the lifting shell 503. Moreover, each arc protrusion 50311 of the concave and convex bottom wall 5031 and each concave arc groove 50211 of the concave and convex top wall 5021 are respectively transposed and engaged in one direction, so that the lifting shell 502 and the lifting shell 503 are limited and will not disengage. In addition, the limiting blocks 5022 on both sides of the inner surface of the lifting shell 502 rotate in one direction within the limited space in the limiting grooves 5032 on both sides of the outer surface of the lifting shell 503. Thus, the lifting shell 503 limits the rotation range of the lifting shell 502. When the concave structure of the concave and convex top wall 5021 on the lifting shell 502 engages with the convex structure of the concave and convex bottom wall 5031 on the lifting shell 503, the lifting shell 503 will descend by a distance value. During the process of the lifting shell 503 descending by a distance value, the suction cup 401 is driven to press down and lie flat against the ground through the connecting rod 504 to release the internal pressure, so that the suction cup 401 disengages from the ground suction.When the user manually rotates the handle assembly 50 in another direction to drive the suction cup 401 to bulge to form internal pressure and suck to the ground, the user can drive the lifting shell 502 to rotate in another direction by holding the handle rod 501. When the lifting shell 502 rotates in another direction, the convex structure of the concave-convex top wall 5021 of the lifting shell 502 contacts the convex structure of the concave-convex bottom wall 5031 of the lifting shell 503, so that the lifting shell 502 jacks up the lifting shell 503. Thus, the state where the concave structure of the concave-convex top wall 5021 of the lifting shell 502 is engaged with the convex structure of the concave-convex bottom wall 5031 of the lifting shell 503 is changed to the state where the convex structure of the concave-convex top wall 5021 of the lifting shell 502 contacts the convex structure of the concave-convex bottom wall 5031 of the lifting shell 503 and the lifting shell 502 jacks up the lifting shell 503. And each arc protrusion 50311 of the concave-convex bottom wall 5031 of the lifting shell 503 and each concave arc groove 50211 of the concave-convex top wall 5021 of the lifting shell 502 are respectively transposed and engaged in another direction, so that the lifting shell 502 and the lifting shell 503 are limited and will not be separated from each other. And the limiting blocks 5022 on both sides of the inner surface of the lifting shell 502 rotate in the limited space in the limiting grooves 5032 on both sides of the outer surface of the lifting shell 503 in another direction. Thus, the lifting shell 503 limits the rotation range of the lifting shell 502. When the convex structure of the concave-convex top wall 5021 of the lifting shell 502 contacts the convex structure of the concave-convex bottom wall 5031 of the lifting shell 503 and the lifting shell 502 jacks up the lifting shell 503, the lifting shell 503 will rise by a distance value. During the process of the lifting shell 503 rising by a distance value, the suction cup 401 is driven to bulge to form internal pressure and suck to the ground through the connecting rod 504. Through such a setting, it enables the user to operate the handle assembly 50 to effectively drive the suction cup 401 to press down and separate from the ground and to effectively drive the suction cup 401 to bulge and suck to the ground.

[0042] Please refer to Figure 10 、 Figure 11 and Figure 12 As shown, in some embodiments, a metal disc 4012 is fixedly wrapped inside the suction cup 401, and the connecting rod 504 is connected to the suction cup 401 by being fixed to the metal disc 4012; the compression spring 4013 abuts between the metal disc 4012 inside the suction cup 401 and the bottom of the base 10.

[0043] During specific implementation: The connecting rod 504 is connected to the suction cup 401 by being fixed to the metal disc 4012, so that the connecting rod 504 and the suction cup 401 are more firmly connected. And when the handle assembly 50 drives the suction cup 401 to bulge to form internal pressure to suck on the ground through the connecting rod 504, the connecting rod 504 can evenly give an upward pulling force to the suction cup 401 through the metal disc 4012. The compression spring 4013 abuts between the metal disc 4012 of the suction cup 401 and the bottom of the base 10, so that when the handle assembly 50 is rotated, the suction cup 401 can be driven to slowly bulge under the restriction of the compression spring 4013 at the bottom of the base 10, preventing the suction cup 401 from being violently driven to rise away from the ground when the handle assembly 50 is rotated. Through such a setting, the connecting rod 504 can provide an even upward pulling force to the suction cup 401 through the metal disc 4012 to drive the suction cup 401 to bulge to form internal pressure and suck on the ground.

[0044] Please refer to Figure 1 As shown, in some embodiments, tension bars 4011 are provided on the sides of both suction cups 401.

[0045] During specific implementation: The tension bar 4011 on the side of the suction cup 401 is used for the user to manually pull up, so that the side of the suction cup 401 rises to release pressure, and the suction cup 401 can be disengaged from the ground suction. Through such a setting, the user can also pull the tension bar 4011 on the side of the suction cup 401 to release the pressure of the suction cup 401 and disengage it from the ground suction.

[0046] Please refer to Figure 1 As shown, in some embodiments, the cross bar member 301 includes a first cross bar 3011 and a second cross bar 3012, and the first cross bar 3011 and the second cross bar 3012 are respectively arranged on both sides of the top of the lifting rod 30.

[0047] During specific implementation: The first cross bar 3011 and the second cross bar 3012 included in the cross bar member 301 are respectively arranged on both sides of the top of the lifting rod 30. Thus, when the user's feet are respectively placed on both sides of the top of the base 10, the feet can respectively hook on the first cross bar 3011 and the second cross bar 3012. Then, the cooperation between the base 10 and the first cross bar 3011 and the second cross bar 3012 can limit and fix the user's feet, and the user can then do sit-up exercises. Through such a setting, the first cross bar 3011 and the second cross bar 3012 included in the cross bar member 301 are respectively arranged on both sides of the top of the lifting rod 30 for the user's feet to hook on respectively.

[0048] Please refer to Figure Figure 9 、 Figure 12 and Figure 13As shown, in some embodiments, a first oil groove 5023 is provided on the concave and convex top wall 5021 at the top end of the lifting shell 502, and a second oil groove 5024 is provided on the bottom end surface of the lifting shell 502; a flat gasket 10311 is provided in the inner groove 1031, and the flat gasket 10311 abuts against the bottom end surface of the lifting shell 502.

[0049] During specific implementation: The first oil groove 5023 is used to contain lubricating oil. When the lifting shell 502 rotates relative to the lifting shell 503, the concave and convex top wall 5021 at the top end of the lifting shell 502 can be in lubricated contact with the concave and convex bottom wall 5031 of the lifting shell 503 through the lubricating oil in the first oil groove 5023; when the lifting shell 502 rotates in the inner groove 1031, the inner groove 1031 abuts against the lifting shell 502 through the flat gasket 10311 to rotate, so as to prevent the bottom wall of the lifting shell 502 from wearing against the bottom wall of the inner groove 1031, and the second oil groove 5024 provided on the bottom end surface of the lifting shell 502 is used to contain lubricating oil, so that the lifting shell 502 can be in lubricated contact with the flat gasket 10311 in the inner groove 1031. Through such a setting, the rotation of the lifting shell 502 relative to the lifting shell 503 is smoother, and the rotation of the lifting shell 502 on the flat gasket 10311 in the inner groove 1031 is smoother.

[0050] Please refer to Figure 2 As shown, in some embodiments, locking marks 1041 and unlocking marks 1042 are respectively printed at both ends of each supply and transfer hole 102 on the outer surface of the base 10.

[0051] During specific implementation: The locking marks 1041 and unlocking marks 1042 respectively corresponding to both ends of each supply and transfer hole 102 on the outer surface of the base 10 are used to provide direction guidance for the user when rotating the handle assembly 50, so that the handle assembly 50 drives the suction cup 401 to press down and separate from the ground or drives the suction cup 401 to bulge and suck the ground through different directions of rotation of the user. Through such a setting, the locking marks 1041 and unlocking marks 1042 at both ends of the supply and transfer hole 102 effectively provide direction guidance for the user to rotate the handle assembly 50.

[0052] Please refer to Figure 7 and Figure 8 As shown, in some embodiments, the inside of the support cylinder 20 is communicated with the inside of the base 10. Limiting hooks 302 are provided on both outer sides of the bottom end of the lifting rod 30, and limiting grooves 203 are provided on both inner sides of the bottom end of the support cylinder 20. When the lifting rod 30 rises to the limit inside the support cylinder 20, the limiting hooks 302 on both outer sides of the bottom end of the lifting rod 30 are respectively hooked with the limiting grooves 203 on both inner sides of the bottom end of the support cylinder 20.

[0053] During specific implementation: when the height of the lifting rod 30 is lowered, the bottom end of the lifting rod 30 extends downward inside the support cylinder 20 and is located inside the base 10. When the height of the lifting rod 30 is adjusted to the highest limit, the limit hooks 302 provided on both outer sides of the bottom end of the lifting rod 30 just engage with the limit grooves 203 opened on both inner sides of the bottom end of the support cylinder 20, thereby realizing the upward limit of the support cylinder 20 on the lifting rod 30. Through such a setting, when the height of the lifting rod 30 is adjusted to the highest limit, it can be engaged with the limit groove 203 of the support cylinder 20 through the limit hook 302, thereby preventing the lifting rod 30 from detaching from the support cylinder 20.

[0054] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0055] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. The narrative way of this specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An abdominal crunch assistor, characterized in that, It includes a base, a support cylinder and a lifting rod; the support cylinder is provided at the top of the base, a suction cup member is provided at the bottom of the base, a cross bar member is provided at the top end of the lifting rod, and the bottom end of the lifting rod is vertically and movably arranged inside the support cylinder; a latch rod is elastically arranged on the lifting rod, a plurality of latch holes are successively formed in the cylinder wall of the support cylinder from top to bottom, and the latch rod elastically arranged on the lifting rod can telescopically penetrate through one of the latch holes in the cylinder wall of the support cylinder; a soft rubber button is provided on the outer surface of the support cylinder, and the soft rubber button covers each of the latch holes.

2. The sit-up assist device according to claim 1, characterized in that, An installation box is fixed by screws inside the lifting rod, a spring piece is installed in the installation box, the spring piece is connected to the latch rod, and the latch rod extends from the inside of the installation box to the outside of the lifting rod to telescopically penetrate through the latch hole.

3. The sit-up assist device according to claim 1, characterized in that, The suction cup member includes two suction cups, and both of the two suction cups are respectively connected to both sides of the bottom of the base through compression springs; accommodation spaces are respectively provided on both sides inside the base, inner grooves are respectively provided on the bottom walls of the accommodation spaces on both sides inside the base, through holes for movement are respectively formed on both sides of the outer surface of the base, the through holes for movement on both sides of the outer surface of the base are respectively communicated with the accommodation spaces on both sides inside the base, handle assemblies are respectively provided in the accommodation spaces on both sides inside the base, and the two handle assemblies are respectively located in the inner grooves of the accommodation spaces on both sides inside the base and respectively penetrate through the through holes for movement on both sides of the outer surface of the base to respectively extend to both sides of the outside of the base, and the two handle assemblies are respectively in transmission connection with the two suction cups.

4. The sit-up assist device according to claim 3, wherein The handle assembly includes a handle rod, a jacking shell, a lifting shell and a connecting rod. The jacking shell is located in the inner groove of the accommodation space inside the base. One end of the handle rod is integrally connected with the jacking shell, and the other end of the handle rod penetrates through the through hole for movement on one side of the outer surface of the base to extend to one side of the outside of the base. The lifting shell is located inside the top of the jacking shell. A circle of concave-convex top wall is provided at the top end of the jacking shell, and a circle of concave-convex bottom wall is provided on the outer surface of the lifting shell. The concave-convex top wall provided at the top end of the jacking shell is fitted with the concave-convex bottom wall provided on the outer surface of the lifting shell. A plurality of concave arc grooves are annularly distributed on the concave-convex top wall, and arc protrusions with the same number as the concave arc grooves are annularly distributed on the concave-convex bottom wall. Each of the concave arc grooves on the concave-convex top wall is respectively fitted with each of the arc protrusions on the concave-convex bottom wall. The bottom of the lifting shell is connected with the connecting rod, and the lifting shell passes through the jacking shell and the bottom wall of the inner groove through the connecting rod to be connected with the suction cup. Limit blocks are respectively provided on both sides of the inner surface of the jacking shell, and limit grooves are respectively formed on both sides of the outer surface of the lifting shell. The limit blocks on both sides of the inner surface of the jacking shell are respectively located in the limit grooves on both sides of the outer surface of the lifting shell.

5. The sit-up assist device according to claim 4, wherein, A metal disc is fixedly wrapped inside the suction cup, and the connecting rod is connected to the suction cup by being fixed to the metal disc; the compression spring abuts between the metal disc inside the suction cup and the bottom of the base.

6. The sit-up assist device according to claim 3, wherein Stretch bars are respectively provided on the sides of the two suction cups.

7. The sit-up assist device according to claim 1, characterized in that, The cross bar member includes a first cross bar and a second cross bar, and the first cross bar and the second cross bar are respectively arranged on both sides of the top end of the lifting rod.

8. The sit-up assist device according to claim 4, characterized in that, A first oil groove is provided on the concave-convex top wall at the top end of the jacking shell, and a second oil groove is provided on the bottom end surface of the jacking shell; a flat gasket is provided in the inner groove, and the flat gasket abuts against the bottom end surface of the jacking shell.

9. The sit-up assist device according to claim 3, wherein Locking marks and unlocking marks are respectively printed on both ends of the outer surface of the base corresponding to each of the movement holes.

10. The sit-up assist device according to claim 1, wherein, The inside of the support cylinder is communicated with the inside of the base, and limiting hooks are arranged on both outer sides of the bottom end of the lifting rod, and limiting grooves are opened on both inner sides of the bottom end of the support cylinder. When the lifting rod rises to the limit inside the support cylinder, the limiting hooks on both outer sides of the bottom end of the lifting rod are respectively hooked with the limiting grooves on both inner sides of the bottom end of the support cylinder.

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