Seated Leg Extension

Abstract

The present invention provides a seated leg curling trainer, which relates to the technical field of fitness equipment. The seated leg curling trainer includes a fixed base plate, the top rear end of the fixed base plate is fixedly connected to a connecting shell, the two sides of the interior of the connecting shell are respectively fixedly connected to a first limiting rod and a second limiting rod, a weight-bearing mechanism is slidably connected between the first limiting rod and the second limiting rod, one side of the top inner surface of the connecting shell is respectively fixedly connected to a first fixed pulley and a second fixed pulley, one side of the connecting shell is fixedly connected to a leg training mechanism, the top center of the fixed base plate is fixedly connected to a support mechanism, and the front and rear ends of the support mechanism are both fixedly connected to a back limiting mechanism. By designing the back limiting mechanism, the back of the human body is restricted by the straps during use, thereby greatly improving the effect of exercise, and making operation convenient without affecting the overall user experience.

Description

Technical Field

[0001] The invention relates to the technical field of fitness equipment, in particular to a sitting leg extension and bending trainer. Background Art

[0002] As people pay more and more attention to health issues, in addition to diet, they will also exercise to enhance their immunity and prevent various diseases. In order to improve people's exercise effects, various training devices have emerged to assist in training. Specific training can be performed on various parts of the human body. Among them, the seated leg extension and flexion trainer is specifically used to train the front thigh muscles. When using it, the buttocks and back need to be completely close to the training seat, and then the legs need to be lifted continuously to assist in training.

[0003] Existing seated leg extension and curling machines can easily cause the upper body to lean forward due to the force exerted by the legs during use, making it impossible for the back to fit into the seat. When the upper body is in a forward leaning position, it is difficult to straighten the legs, making it difficult to tighten the quadriceps, thereby greatly reducing the effect of the exercise.

[0004] For this reason, we have developed a new Seated Leg Extension. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the shortcomings of the existing technology, the present invention provides a seated leg extension and leg curling trainer, which solves the problem that the existing seated leg extension and leg curling trainer has no restrictions on the user's sitting posture.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: An embodiment of the present invention provides a seated leg extension and curling exerciser, comprising a fixed base plate, a top rear end of the fixed base plate being fixedly connected to a connecting shell, and two sides of the connecting shell being fixedly connected to a first limiting rod and a second limiting rod respectively;

[0009] A load-bearing mechanism is slidably connected between the first limiting rod and the second limiting rod, a first fixed pulley and a second fixed pulley are fixedly connected to one side of the inner surface of the top of the connecting shell, and a third fixed pulley and a fourth fixed pulley are fixedly connected to one side of the inner surface of the bottom of the connecting shell;

[0010] A roller is rotatably connected to one side of the front bottom of the connecting shell, a leg training mechanism is fixedly connected to one side of the connecting shell, a transmission wire is provided between the weight-bearing mechanism and the leg training mechanism, a support mechanism is fixedly connected to the top center of the fixed bottom plate, and the front and rear ends of the support mechanism are fixedly connected to the back limiting mechanism.

[0011] Preferably, the load-bearing mechanism includes a plurality of adjustment load-bearing blocks and a top load-bearing block slidably connected between the first limit rod and the second limit rod, the top and bottom centers of the top load-bearing block are respectively fixedly connected with a connecting block and a porous plate, and an adjustment rod is installed between the porous plate and the adjustment load-bearing block.

[0012] Through the above technical solution, when in use, the adjusting rod is inserted into the appropriate adjusting weight block, and the leg drives the leg training mechanism to drive the connecting block through the transmission wire, thereby driving the top weight block and the porous plate to move, and the corresponding number of adjusting weight blocks are driven to move through the porous plate and the adjusting rod.

[0013] Preferably, the plurality of adjustable weight blocks are respectively provided with rectangular through holes and circular through holes corresponding to the porous plates and the adjusting rods.

[0014] Through the above technical solution, it is ensured that the porous plate and the adjustment rod can be inserted into the interior of the adjustment weight block.

[0015] Preferably, the transmission steel wire is respectively in contact with outer walls of the first fixed pulley, the second fixed pulley, the third fixed pulley and the fourth fixed pulley.

[0016] Through the above technical solution, the direction of the transmission wire is continuously changed by the first fixed pulley, the second fixed pulley, the third fixed pulley and the fourth fixed pulley, thereby completing the connection between the weight-bearing mechanism and the leg training mechanism.

[0017] Preferably, the leg training mechanism includes a fixed plate fixedly connected to one side of the connecting shell, a fixed disk fixedly connected to the front of the fixed plate, a rotating shell rotatably connected to the center of the fixed disk, a connecting rod fixedly connected to the bottom of the rotating shell, a rotating sleeve rotatably connected to the front of the connecting rod, and a driving roller sleeve rotatably connected to the front end of the rotating sleeve.

[0018] Through the above technical solution, when the legs are lifted upward to drive the roller sleeve, the connecting rod and the rotating shell are driven to rotate on the fixed disk, and the transmission wire is driven by the rotating shell to complete the transmission.

[0019] Preferably, the support mechanism includes a first column and a second column fixedly connected to the top of the fixed base plate, the tops of the first column and the second column are fixedly connected to a seat plate, the two sides of the seat plate are respectively fixedly connected to a support plate and a back plate, and the front and rear surfaces of the bottom of the back plate are fixedly connected to elastic locking bands.

[0020] According to the above technical solution, when in use, the user sits on the seat plate, opens the two elastic locking belts, connects the two elastic locking belts after adjusting the sitting posture, and places the legs on the support plate.

[0021] Preferably, the two elastic locking bands are connected by a plastic buckle.

[0022] Through the above technical solution, the user's waist can be limited to a certain extent by the two elastic locking belts, so that the user can be subject to a certain constraint to ensure that the user is in a correct posture.

[0023] Preferably, the back limiting mechanism includes a fixed shell fixedly connected to the seat plate and one side of the back plate, one side of the fixed shell is fixedly connected to a fixed sleeve, the middle section of the inner wall of the fixed sleeve is fixedly connected to a multi-toothed clamping ring, the inner wall of the fixed shell is rotatably connected to a rotating column, the outer wall of the rotating column is provided with a connecting rope, one end of the connecting rope is fixedly connected to a shoulder strap between the back plate, the inner wall of the fixed sleeve is slidably connected to a sliding rod, one end of the sliding rod is fixedly connected to a gear, one side of the gear is fixedly connected to a connecting thin rod, and one end of the connecting thin rod is fixedly connected to a conical block.

[0024] Through the above technical solution, when in use, the user passes his two arms between the shoulder strap and the backboard, and then pushes the sliding rod backward, so that it pushes the conical block to insert into the interior of the rotating column, and the multi-tooth snap ring and the gear are engaged, and then the sliding rod is rotated, thereby driving the rotating column to wrap around the connecting rope, so that the shoulder strap continues to shrink until the user feels that the restraint force reaches the appropriate strength, and then the user holds the fixed sleeve tightly to start exercising. In this process, the engagement of the multi-tooth snap ring and the gear can prevent the sliding rod from rotating, and can achieve self-locking. At the same time, the teeth on one side of the gear are a bevel structure, which can be more conveniently inserted into the multi-tooth snap ring. After exercising, the sliding rod is pulled out and the shoulder strap is released from the limit.

[0025] Preferably, through holes corresponding to the shoulder straps and the connecting ropes are provided inside the front and rear sides of the backrest.

[0026] The above technical solution ensures that the shoulder strap can be driven to complete contraction through the connecting rope.

[0027] Preferably, a groove corresponding to the conical block is provided on one side of the rotating column, and the cross section of the groove is diamond-shaped.

[0028] Through the above technical solution, the conical structure can better facilitate the insertion of the conical clamping block, and at the same time, the diamond-shaped cross-section enables the inserted conical clamping block to drive the rotating column to rotate.

[0029] (3) Beneficial effects

[0030] The present invention provides a seated leg extension and bending training device. It has the following beneficial effects:

[0031] This seated leg extension and curling trainer is designed with a back limit mechanism. When in use, the back straps limit the back of the human body. During exercise, the body can be prevented from leaning forward due to leg force, so that the body is always in a standard posture, thereby greatly improving the effect of exercise. The overall structure is driven by a sliding rod inside the fixed sleeve. After the sitting posture is adjusted, the back straps are driven to impose restrictions on the human body. After the exercise is completed, the sliding rod is pulled out to release the back straps from the limit, which is convenient for operation and does not affect the overall user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0033] Figure 2 This is a schematic cross-sectional view of the load-bearing mechanism of the present invention;

[0034] Figure 3 This is a schematic diagram of the internal structure of the connecting shell of the present invention;

[0035] Figure 4 It is a side view of a schematic diagram of the three-dimensional structure of the present invention;

[0036] Figure 5 It is a schematic diagram of the three-dimensional structure of the support mechanism of the present invention;

[0037] Figure 6 This is a schematic cross-sectional view of the back limiting mechanism of the present invention;

[0038] Figure 7 This is an exploded structural diagram of the back limiting mechanism of the present invention;

[0039] Figure 8 This is a structural diagram of the multi-toothed clamping ring and the rotating column of the present invention;

[0040] Figure 9 This is a structural diagram of the multi-tooth snap ring and gear of the present invention.

[0041] Among them, 1. Fixed bottom plate; 2. Connecting shell; 3. First limiting rod; 4. Second limiting rod; 5. Weight-bearing mechanism; 501. Adjustable weight block; 502. Top weight block; 503. Connecting block; 504. Perforated plate; 505. Adjusting plug rod; 6. First fixed pulley; 7. Second fixed pulley; 8. Third fixed pulley; 9. Fourth fixed pulley; 10. Transmission wire; 11. Roller; 12. Leg training mechanism; 1201. Fixed plate; 1202. Fixed disk; 1203. Rotating shell; 1204. Connecting rod; 1205 , rotating sleeve; 1206, driving roller sleeve; 13, supporting mechanism; 1301, first column; 1302, second column; 1303, seat plate; 1304, support plate; 1305, back plate; 1306, elastic locking belt; 14, back limiting mechanism; 1401, fixed shell; 1402, fixed sleeve; 1403, multi-tooth clamp; 1404, rotating column; 1405, connecting rope; 1406, shoulder strap; 1407, sliding rod; 1408, gear; 1409, connecting thin rod; 1410, conical block. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a seated leg extension and curling trainer, comprising a fixed base plate 1, a connecting shell 2 being fixedly connected to the top rear end of the fixed base plate 1, and a first limiting rod 3 and a second limiting rod 4 being fixedly connected to both sides of the interior of the connecting shell 2;

[0044] like Figure 1-Figure 3As shown, a weight-bearing mechanism 5 is slidably connected between the first limiting rod 3 and the second limiting rod 4. The weight-bearing mechanism 5 includes a plurality of adjustable weight blocks 501 and a top weight block 502 slidably connected between the first limiting rod 3 and the second limiting rod 4. The top and bottom centers of the top weight block 502 are respectively fixedly connected with a connecting block 503 and a porous plate 504. An adjusting rod 505 is installed between the porous plate 504 and the adjusting weight block 501. When in use, the adjusting rod 505 is inserted into a suitable adjusting weight block 501, and the leg-driving leg training mechanism 12 drives the connecting block 503 through the transmission wire 10. , and then drive the top load block 502 and the porous plate 504 to move, and drive the corresponding number of adjustment load blocks 501 to move through the porous plate 504 and the adjustment plug rod 505, and the multiple adjustment load blocks 501 are respectively provided with rectangular through holes and circular through holes corresponding to the porous plate 504 and the adjustment plug rod 505, ensuring that the porous plate 504 and the adjustment plug rod 505 can be inserted into the interior of the adjustment load block 501, and the first fixed pulley 6 and the second fixed pulley 7 are fixedly connected to one side of the inner surface of the top of the connecting shell 2, and the third fixed pulley 8 and the fourth fixed pulley 9 are fixedly connected to one side of the inner surface of the bottom of the connecting shell 2;

[0045] like Figure 1-Figure 5As shown, a roller 11 is rotatably connected to one side of the bottom front of the connecting shell 2, and a leg training mechanism 12 is fixedly connected to one side of the connecting shell 2. The leg training mechanism 12 includes a fixed plate 1201 fixedly connected to one side of the connecting shell 2, a fixed disk 1202 is fixedly connected to the front of the fixed plate 1201, a rotating shell 1203 is rotatably connected to the center of the fixed disk 1202, a connecting rod 1204 is fixedly connected to the bottom of the rotating shell 1203, and a rotating sleeve 1205 is rotatably connected to the front of the connecting rod 1204. The rotating sleeve 120 The front end of the weight-bearing mechanism 5 is connected to the driving roller sleeve 1206, and when the leg lifts the driving roller sleeve 1206 upward, the connecting rod 1204 and the rotating shell 1203 are driven to rotate on the fixed plate 1202, and the rotating shell 1203 can drive the transmission wire 10 to complete the transmission. A transmission wire 10 is provided between the weight-bearing mechanism 5 and the leg training mechanism 12, and the transmission wire 10 is respectively fitted with the outer walls of the first fixed pulley 6, the second fixed pulley 7, the third fixed pulley 8 and the fourth fixed pulley 9. , the third fixed pulley 8 and the fourth fixed pulley 9 continuously change the direction of the transmission wire 10, thereby completing the connection between the weight-bearing mechanism 5 and the leg training mechanism 12, the top center of the fixed base plate 1 is fixedly connected to the support mechanism 13, the support mechanism 13 includes a first column 1301 and a second column 1302 fixedly connected to the top of the fixed base plate 1, the top of the first column 1301 and the second column 1302 are fixedly connected to the seat plate 1303, and the two sides of the seat plate 1303 are respectively fixedly connected to the support plate 1304 and the back plate 130 5. Elastic locking belts 1306 are fixedly connected to the front and back surfaces of the bottom of the backrest 1305. When in use, the user sits on the seat plate 1303, opens the two elastic locking belts 1306, adjusts the sitting posture, connects the two elastic locking belts 1306, and then places the legs on the support plate 1304. The two elastic locking belts 1306 are connected by plastic buckles. The two elastic locking belts 1306 can limit the user's waist to a certain extent, so that the user can be constrained to a certain extent to ensure that the user is in a correct posture;

[0046] like Figures 1-9As shown, the front and rear ends of the support mechanism 13 are fixedly connected to the back limiting mechanism 14, and the back limiting mechanism 14 includes a fixed shell 1401 fixedly connected to the seat plate 1303 and one side of the back plate 1305. One side of the fixed shell 1401 is fixedly connected to a fixed sleeve 1402, and the middle section of the inner wall of the fixed sleeve 1402 is fixedly connected to a multi-toothed snap ring 1403. The inner wall of the fixed shell 1401 is rotatably connected to a rotating column 1404, and the outer wall of the rotating column 1404 is provided with a connecting rope 1405. One end of the connecting rope 1405 is fixed between the back plate 1305. A shoulder strap 1406 is fixedly connected, and a sliding rod 1407 is slidably connected to the inner wall of the fixed sleeve 1402. One end of the sliding rod 1407 is fixedly connected to a gear 1408. A connecting rod 1409 is fixedly connected to one side of the gear 1408. One end of the connecting rod 1409 is fixedly connected to a conical block 1410. When in use, the user passes two arms between the shoulder strap 1406 and the back plate 1305, and then pushes the sliding rod 1407 backward to push the conical block 1410 into the interior of the rotating column 1404, and the multi-toothed snap ring 140 3 and gear 1408 are engaged, and then the sliding rod 1407 is rotated, which drives the rotating column 1404 to wrap around the connecting rope 1405, so that the shoulder strap 1406 is continuously contracted until the user feels that the restraint force reaches an appropriate strength. Then the user holds the fixing sleeve 1402 tightly and starts exercising. In this process, the engagement of the multi-toothed clasp 1403 and the gear 1408 can prevent the sliding rod 1407 from rotating and realize self-locking. At the same time, the teeth on one side of the gear 1408 are inclined, which can be more conveniently inserted into the multi-toothed clasp 1403. After exercising, Pull out the sliding rod 1407, and the shoulder strap 1406 is disengaged from the limit. The interior of the front and rear sides of the support plate 1305 are provided with through holes corresponding to the shoulder strap 1406 and the connecting rope 1405, ensuring that the shoulder strap 1406 can be driven to complete the contraction through the connecting rope 1405. A groove corresponding to the conical block 1410 is provided on one side of the rotating column 1404, and the cross-section of the groove is diamond-shaped. The conical structure can better facilitate the insertion of the conical block 1410. At the same time, the diamond-shaped cross-section enables the inserted conical block 1410 to drive the rotating column 1404 to rotate.

[0047] Working principle: by inserting the adjustment rod 505 into the appropriate adjustment weight block 501, the user sits on the seat plate 1303, opens the two elastic locking belts 1306, connects the two elastic locking belts 1306 after adjusting the sitting posture, and places the legs on the support plate 1304. Then, the two arms pass between the straps 1406 and the backrest 1305, and then push the sliding rod 1407 backward to push the conical block 1410 into the interior of the rotating column 1404, and make the multi-toothed clamping ring 1403 and the gear 1408 complete the engagement, and then rotate the sliding rod 1407, thereby driving the rotating column 1404 to wrap around the connecting rope 1405, so that the straps 1406 It continues to contract until the user feels that the restraint force has reached an appropriate level, and then the user can start exercising by holding the fixed sleeve 1402. When the leg is lifted upward to drive the roller sleeve 1206, the connecting rod 1204 and the rotating shell 1203 are driven to rotate on the fixed plate 1202. The rotating shell 1203 can drive the transmission wire 10 to complete the transmission, and the transmission wire 10 drives the connecting block 503, and then drives the top weight block 502 and the porous plate 504 to move. The corresponding number of adjustment weight blocks 501 are driven to move through the porous plate 504 and the adjustment rod 505. After the exercise, the sliding rod 1407 is pulled out and the shoulder strap 1406 is released from the limit.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A seated leg extension and flexion training device, comprising a fixed base plate (1), characterized in that: The top rear end of the fixed base plate (1) is fixedly connected to a connection shell (2), and the two sides inside the connection shell (2) are respectively fixedly connected to a first limiting rod (3) and a second limiting rod (4); A load-bearing mechanism (5) is slidably connected between the first limiting rod (3) and the second limiting rod (4); a first fixed pulley (6) and a second fixed pulley (7) are fixedly connected to one side of the top inner surface of the connecting shell (2); and a third fixed pulley (8) and a fourth fixed pulley (9) are fixedly connected to one side of the bottom inner surface of the connecting shell (2); A roller (11) is rotatably connected to one side of the bottom front of the connecting shell (2), a leg training mechanism (12) is fixedly connected to one side of the connecting shell (2), a transmission wire (10) is provided between the weight-bearing mechanism (5) and the leg training mechanism (12), a support mechanism (13) is fixedly connected to the top center of the fixed base plate (1), the support mechanism (13) comprises a first column (1301) and a second column (1302) fixedly connected to the top of the fixed base plate (1), the tops of the first column (1301) and the second column (1302) are fixedly connected to a seat plate (1303), the two sides of the seat plate (1303) are respectively fixedly connected to a support plate (1304) and a back plate (1305), the front and rear surfaces of the bottom of the back plate (1305) are fixedly connected to elastic locking belts (1306), the front and rear ends of the support mechanism (13) are fixedly connected to a back limiting mechanism (14), the back limiting mechanism (14) is fixedly connected to the front and rear ends of the support mechanism (13), The mechanism (14) includes a fixed shell (1401) fixedly connected to one side of the seat plate (1303) and the back plate (1305), a fixed sleeve (1402) fixedly connected to one side of the fixed shell (1401), a multi-toothed snap ring (1403) fixedly connected to the middle section of the inner wall of the fixed sleeve (1402), a rotating column (1404) rotatably connected to the inner wall of the fixed shell (1401), and a connecting rope (1405) provided on the outer wall of the rotating column (1404). ), a shoulder strap (1406) is fixedly connected between one end of the connecting rope (1405) and the back plate (1305), a sliding rod (1407) is slidably connected to the inner wall of the fixing sleeve (1402), one end of the sliding rod (1407) is fixedly connected to a gear (1408), one side of the gear (1408) is fixedly connected to a connecting thin rod (1409), and one end of the connecting thin rod (1409) is fixedly connected to a conical block (1410).

2. The seated leg extension and flexion training device according to claim 1, characterized in that: The load-bearing mechanism (5) comprises a plurality of adjustable load-bearing blocks (501) and a top load-bearing block (502) slidably connected between a first limiting rod (3) and a second limiting rod (4); a connecting block (503) and a porous plate (504) are fixedly connected to the top and bottom centers of the top load-bearing block (502), respectively; an adjustable insertion rod (505) is installed between the porous plate (504) and the adjustable load-bearing block (501).

3. The seated leg extension and flexion training device according to claim 2, characterized in that: The plurality of adjustable weight blocks (501) are respectively provided with rectangular through holes and circular through holes corresponding to the porous plates (504) and the adjustable insertion rods (505).

4. The seated leg extension and flexion training device according to claim 1, characterized in that: The transmission steel wire (10) is respectively fitted with the outer walls of the first fixed pulley (6), the second fixed pulley (7), the third fixed pulley (8) and the fourth fixed pulley (9).

5. The seated leg extension and flexion training device according to claim 1, characterized in that: The leg training mechanism (12) comprises a fixed plate (1201) fixedly connected to one side of the connecting shell (2); a fixed disc (1202) is fixedly connected to the front of the fixed plate (1201); the center of the fixed disc (1202) is rotatably connected to a rotating shell (1203); the bottom of the rotating shell (1203) is fixedly connected to a connecting rod (1204); the front of the connecting rod (1204) is rotatably connected to a rotating sleeve (1205); and the front end of the rotating sleeve (1205) is rotatably connected to a driving roller sleeve (1206).

6. The seated leg extension and flexion training device according to claim 1, characterized in that: The two elastic locking bands (1306) are connected via a plastic buckle.

7. The seated leg extension and curling machine according to claim 1, characterized in that: Through holes corresponding to the shoulder straps (1406) and the connecting ropes (1405) are provided inside the front and rear sides of the backrest (1305).

8. The seated leg extension and flexion training device according to claim 1, characterized in that: A groove corresponding to the conical block (1410) is provided on one side of the rotating column (1404), and the cross section of the groove is rhombus-shaped.

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