Three-head pressing trainer

Abstract

The utility model provides a three-head down-pressing training device which comprises a machine frame, an adjusting pull rod, a seat plate installed on the machine frame and two swing arms hinged to the machine frame respectively, the two swing arms are located on the two sides of the seat plate respectively, a handle is arranged at the end, close to the seat plate, of each swing arm, the other end of each swing arm is hinged to an adjusting arm, and the adjusting pull rod is arranged on the adjusting arm. A barbell shaft is fixed to the adjusting arm, and the hinged point of the swing arm and the rack is located between the adjusting arm and the handle. One end of the adjusting pull rod is hinged to the rack, and the other end of the adjusting pull rod is hinged to the adjusting arm. The swing arm, the adjusting arm and the adjusting pull rod form a force arm adjusting mechanism, and the length of a force arm can be changed along with the action change of a trainer, so that the trainer can press down and start more easily, and meanwhile, the load is ensured to meet the training requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of fitness equipment, and particularly relates to a triceps press-down trainer. Background Art

[0002] A triceps press-down trainer is a fitness equipment mainly used for exercising the triceps of the upper limbs. Through targeted training with the triceps press-down trainer, it helps to improve muscle lines and enhance muscle strength. In the press-down training, at the initial stage of the press-down, the trainer's arm needs to be bent. The trainer gradually extends the arm to press down the equipment to perform the training action. It is most difficult to press down when the trainer's arm is bent. As the arm extends, the trainer will feel more and more relaxed. In order to start the press-down smoothly, a lighter load needs to be selected, but reducing the training load will cause the later training load not to meet the requirements, affecting the training effect. Therefore, a trainer that can change the load according to the training action is needed to facilitate the start of the press-down and not affect the later training effect. Content of the Utility Model

[0003] To solve the problems in the background art, the utility model provides a triceps press-down trainer, which includes a frame, an adjusting pull rod, a seat plate installed on the frame, and two swing arms respectively hinged to the frame. The two swing arms are respectively located on both sides of the seat plate. A handle is provided at one end of the swing arm close to the seat plate, and an adjusting arm is hinged to the other end of the swing arm. A barbell shaft is fixed on the adjusting arm. The hinge point between the swing arm and the frame is located between the adjusting arm and the handle. One end of the adjusting pull rod is hinged to the frame, and the other end of the adjusting pull rod is hinged to the adjusting arm.

[0004] Preferably, the bottom end of the adjusting arm is hinged to the swing arm, the barbell shaft is fixed at the top of the adjusting arm, the hinge point between the adjusting pull rod and the adjusting arm is located between the swing arm and the barbell shaft, and the hinge point between the adjusting pull rod and the frame is located above the hinge point between the swing arm and the frame.

[0005] Preferably, the seat plate is installed on the first support plate through a height adjusting mechanism, and the bottom end of the first support plate is connected to the frame through a horizontal displacement adjusting mechanism.

[0006] Preferably, the height adjusting mechanism includes at least one set of connecting rods, a first adjusting plate, and a first positioning pin. A fixing plate is fixed at the bottom of the seat plate. One set of connecting rods includes two connecting rods, which are arranged vertically. One end of the connecting rod is hinged to the fixing plate, and the other end of the connecting rod is hinged to the first support plate.

[0007] The first adjusting plate is fixed on the side of the first support plate close to the seat plate, and a plurality of first adjusting holes are arranged vertically on the first adjusting plate.

[0008] The first positioning pin includes a first dial plate, a first pull rod, and a first pin for plugging and cooperating with the first adjustment hole. One end of the first dial plate is respectively hinged to the fixed plate and the first pull rod. The hinge point between the first dial plate and the fixed plate and the hinge point between the first dial plate and the first pull rod are arranged vertically. The first dial plate is located at the end of the fixed plate away from the first support plate. The end of the first pull rod away from the first dial plate fixes the first pin. The first pull rod is slidably connected to the fixed plate.

[0009] Preferably, a first fixed shell is fixed at the end of the fixed plate close to the first support plate. A first sliding hole and a second sliding hole are provided in the first fixed shell and are communicated with each other. The first sliding hole is located at the end of the first fixed shell close to the first dial plate. The diameter of the first sliding hole is smaller than that of the second sliding hole. The end of the first pull rod away from the first dial plate sequentially passes through the first sliding hole and the second sliding hole and is slidably connected to the first fixed shell. A first pressing block is fixed on the outer wall of the first pull rod. The first pressing block is slidably located in the second sliding hole. The diameter of the first pressing block is larger than that of the first sliding hole. A first spring is sleeved on the outer wall of the first pull rod. The first spring is located in the second sliding hole between the first pressing block and the first sliding hole. One end of the first spring is connected to the first pressing block, and the other end of the first spring is connected to the inner wall of the first fixed shell. The outer diameter of the first spring is larger than that of the second sliding hole.

[0010] Preferably, there are two fixed plates. The two fixed plates are arranged in parallel and there is a distance between them. The first pull rod, the first dial plate, the first fixed shell, and the first pin are all located between the two fixed plates;

[0011] The height adjustment mechanism includes two groups of connecting rods. The two groups of connecting rods are respectively connected to the two fixed plates. The two groups of connecting rods are symmetrically arranged;

[0012] At least one side of the fixed plate is provided with a gas spring. One end of the gas spring is hinged to the fixed plate, and the other end of the gas spring is hinged to the first support plate.

[0013] Preferably, the horizontal displacement adjustment mechanism includes a second positioning pin, a slide rod, a second adjustment plate, and a slide plate. Both ends of the slide rod and the second adjustment plate are fixedly connected to the frame. The slide rod and the second adjustment plate are both arranged along the first direction. The slide plate is slidably arranged on the slide rod. The bottom end of the first support plate is fixedly connected to the slide plate;

[0014] The second adjusting plate is provided with a plurality of second adjusting holes along the first direction. The second positioning pin includes a second dial plate, a second pull rod, and a second pin used for plugging and cooperating with the second adjusting holes. One end of the second dial plate is respectively hinged to the first support plate and the top end of the second pull rod. The hinge point between the second dial plate and the first support plate and the hinge point between the second dial plate and the second pull rod are arranged in sequence along the first direction. The bottom end of the second pull rod is hinged to the second pin. An installation plate is fixed to the bottom of the first support plate, and the second pin is slidably connected to the installation plate.

[0015] Preferably, a second fixed shell is fixed to the installation plate. A third sliding hole and a fourth sliding hole which are communicated with each other are arranged in the second fixed shell. The third sliding hole is located at one end of the second fixed shell close to the second dial plate, and the diameter of the third sliding hole is smaller than that of the fourth sliding hole. A third pull rod is fixed to the top end of the second pin. The third pull rod sequentially passes through the fourth sliding hole and the third sliding hole and is slidably connected to the second fixed shell. A second pressing block is fixed to the outer wall of the third pull rod. The second pressing block is slidably located in the fourth sliding hole, and the diameter of the second pressing block is larger than that of the fourth sliding hole. A second spring is sleeved on the outer wall of the third pull rod. The second spring is located in the fourth sliding hole between the second pressing block and the third sliding hole. One end of the second spring is connected to the second pressing block, and the other end of the second spring is connected to the inner wall of the second fixed shell. The outer diameter of the second spring is larger than that of the third sliding hole.

[0016] Preferably, a second support plate is fixed to the side of the first support plate away from the seat plate. A leg pressing roller is telescopically arranged at the top of the second support plate. The second positioning pin is located on the side of the second support plate away from the first support plate, and the second dial plate is hinged to the first support plate through the second support plate.

[0017] Preferably, an adjusting groove is arranged vertically in the second support plate. The leg pressing roller is rotatably installed on a plug rod. The plug rod is slidably arranged in the adjusting groove. A plurality of third adjusting holes are arranged on the plug rod along the length direction of the plug rod.

[0018] An adjusting pin which is plugged and cooperated with the third adjusting holes is arranged on the second support plate.

[0019] The beneficial effects of the utility model are as follows:

[0020] 1. The swing arm, the adjusting arm, and the adjusting pull rod of the utility model constitute a force arm adjusting mechanism, which can change the force arm length along with the movement change of the trainer, so that the trainer can more easily start the downward pressure while ensuring that the load meets the training requirements. The change of the force arm during the movement can also change the degree of muscle stimulation of the human body during the training process, making the training effect better, more in line with the principle of sports fitness, and ensuring the safety of the human body at the same time.

[0021] 2. The horizontal position and height of the seat board of the present utility model can be adjusted. The trainer can adjust the position of the seat board according to his own body shape and habits, and the present utility model can meet the usage requirements of trainers with different body shapes, with high usage flexibility and better compliance with ergonomics. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0023] Figure 2 is a schematic diagram of the side structure of the present utility model;

[0024] Figure 3 is a schematic diagram of the overall structure of the present utility model after hiding the footrest and the mounting plate;

[0025] Figure 4 is a schematic diagram of the front structure of the present utility model;

[0026] Figure 5 is Figure 4 a sectional view taken along line A-A in

[0027] Figure 6 is Figure 5 an enlarged view of part A in

[0028] Figure 7 is Figure 5 an enlarged view of part B in

[0029] Figure 8 is Figure 5 an enlarged view of part C in

[0030] Reference numerals in the figures: 1, frame; 2, adjusting pull rod; 3, seat board; 4, swing arm; 5, handle; 6, adjusting arm; 7, barbell shaft; 8, first support plate; 9, connecting rod; 10, first adjusting plate; 11, display screen; 12, first adjusting hole; 13, fixing plate; 14, first shifting plate; 15, first pull rod; 16, first pin; 17, first fixing shell; 18, first sliding hole; 19, second sliding hole; 20, first pressing block; 21, first spring; 22, gas spring; 23, sliding rod; 24, second adjusting plate; 25, sliding plate; 26, second adjusting hole; 27, second shifting plate; 28, second pull rod; 29, second pin; 30, mounting plate; 31, second fixing shell; 32, third sliding hole; 33, fourth sliding hole; 34, third pull rod; 35, second pressing block; 36, second spring; 37, second support plate; 38, leg pressing roller; 39, adjusting groove; 40, inserting rod; 41, third adjusting hole; 42, third fixing shell; 43, sliding groove; 44, sliding hole; 45, third pin; 46, pulling block; 47, pulling rod; 48, third pressing block; 49, third spring; 50, buffer block; 51, footrest. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the present utility model clearer and more understandable, the following further elaborates on the technical solution of the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the given embodiments are only one of the implementation manners and do not represent all embodiments.

[0032] In this article, terms such as "inner, outer, upper, lower, horizontal, vertical" are established based on the positional relationship shown in the accompanying drawings. Depending on the different accompanying drawings, the corresponding positional relationship may also change accordingly. Therefore, it cannot be understood as an absolute limitation on the protection scope.

[0033] Combined with the attached Figure 1 - attached Figure 8 , a three - head pressing trainer, comprising a frame 1, an adjusting pull rod 2, a seat plate 3 installed on the frame 1, and two swing arms 4 respectively hinged to the frame 1. The two swing arms 4 are respectively located on both sides of the seat plate 3. One end of the swing arm 4 close to the seat plate 3 is provided with a handle 5. The other end of the swing arm 4 is hinged with an adjusting arm 6. The bottom end of the adjusting arm 6 is hinged to the swing arm 4. A barbell shaft 7 is fixed at the top of the adjusting arm 6. A barbell for applying load is placed on the barbell shaft 7. The hinge point between the swing arm 4 and the frame 1 is located between the adjusting arm 6 and the handle 5. One end of the adjusting pull rod 2 is hinged to the frame 1. The hinge point between the adjusting pull rod 2 and the frame 1 is above the hinge point between the swing arm 4 and the frame 1. The other end of the adjusting pull rod 2 is hinged to the adjusting arm 6. The hinge point between the adjusting pull rod 2 and the adjusting arm 6 is located between the swing arm 4 and the barbell shaft 7.

[0034] Specifically, a buffer block 50 is provided at the bottom of the end of the swing arm 4 where the adjusting arm 6 is provided. The buffer block 50 buffers the collision between the swing arm 4 and the frame 1 to prevent the swing arm 4 from being directly damaged by collision with the frame 1. The buffer block 50 can be made of rubber material;

[0035] A foot pedal 51 is fixed on the frame 1. The foot pedal 51 is located at one end of the frame 1 where the seat plate 3 is provided;

[0036] The handle 5 is rotatably connected to the swing arm 4;

[0037] A display screen 11 is fixed on the frame 1. The display screen 11 is located between the two swing arms 4.

[0038] Specifically, the seat plate 3 is installed on a first support plate 8 through a height - adjusting mechanism. The bottom end of the first support plate 8 is connected to the frame 1 through a horizontal - displacement adjusting mechanism.

[0039] Specifically, the height adjustment mechanism includes at least one set of connecting rods 9, a first adjustment plate 10, and a first positioning pin. A fixed plate 13 is fixed to the bottom of the seat plate 3. One set of connecting rods 9 includes two connecting rods 9, which are arranged vertically. One end of the connecting rod 9 is hinged to the fixed plate 13, and the other end of the connecting rod 9 is hinged to the first support plate 8;

[0040] The first adjustment plate 10 is fixed to one side of the first support plate 8 close to the seat plate 3. A plurality of first adjustment holes 12 are provided vertically on the first adjustment plate 10. Specifically, the first adjustment plate 10 is an arc-shaped member protruding away from the first support plate 8;

[0041] The first positioning pin includes a first dial plate 14, a first pull rod 15, and a first pin 16 for plugging and matching with the first adjustment hole 12. One end of the first dial plate 14 is respectively hinged to the fixed plate 13 and the first pull rod 15. The hinge point of the first dial plate 14 and the fixed plate 13 and the hinge point of the first dial plate 14 and the first pull rod 15 are arranged vertically. The first dial plate 14 is located at one end of the fixed plate 13 away from the first support plate 8. The end of the first pull rod 15 away from the first dial plate 14 fixes the first pin 16. A first fixed shell 17 is fixed to one end of the fixed plate 13 close to the first support plate 8. A first sliding hole 18 and a second sliding hole 19 are provided in the first fixed shell 17 and are communicated with each other. The first sliding hole 18 is located at one end of the first fixed shell 17 close to the first dial plate 14. The diameter of the first sliding hole 18 is smaller than the diameter of the second sliding hole 19. The end of the first pull rod 15 away from the first dial plate 14 sequentially passes through the first sliding hole 18 and the second sliding hole 19 and is slidably connected to the first fixed shell 17. A first pressing block 20 is fixed to the outer wall of the first pull rod 15. The first pressing block 20 is slidably located in the second sliding hole 19. The diameter of the first pressing block 20 is larger than the diameter of the first sliding hole 18. A first spring 21 is sleeved on the outer wall of the first pull rod 15. The first spring 21 is located in the second sliding hole 19 between the first pressing block 20 and the first sliding hole 18. One end of the first spring 21 is connected to the first pressing block 20, and the other end of the first spring 21 is connected to the inner wall of the first fixed shell 17. The outer diameter of the first spring 21 is larger than the diameter of the second sliding hole 19.

[0042] When the first spring 21 is in a natural state, the first latch 16 is located outside the first fixed shell 17, and the first latch 16 is inserted into a first adjusting hole 12. When the height of the seat plate 3 needs to be adjusted, the trainee shifts the first shift plate 14 away from one end of the fixed plate 13, and pulls the first pull rod 15 through the first shift plate 14. The first pull rod 15 drives the first pressure block 20 and the first latch 16 to move. As the movement progresses, the first latch 16 gradually moves out of the first adjusting hole 12, and the first pressure block 20 compresses the first spring 21. At this time, the seat plate 3 can move up and down; after the seat plate 3 is moved to the desired height, the first shift plate 14 is released. At this time, the first pressure block 20 loses its pulling force. The first pressure block 20 will move in the direction close to the first adjusting hole 12 under the elastic force of the first spring 21. The first pressure block 20 drives the first latch 16 to be inserted into the corresponding first adjusting hole 12, and the seat plate 3 is fixed, completing the height adjustment of the seat plate 3.

[0043] Specifically, there are two fixing plates 13, the two fixing plates 13 are arranged in parallel, and a distance is maintained between the two fixing plates 13, and the first pull rod 15, the first shift plate 14, the first fixing shell 17 and the first latch 16 are all located between the two fixing plates 13;

[0044] The height adjustment mechanism includes two groups of connecting rods 9, which are respectively connected to two fixing plates 13, and the two groups of connecting rods 9 are symmetrically arranged; the two groups of connecting rods 9 can make the seat plate 3 rise and fall more stably.

[0045] A gas spring 22 is provided on one side of at least one fixed plate 13, one end of the gas spring 22 is hinged to the fixed plate 13, and the other end of the gas spring 22 is hinged to the first support plate 8. The gas spring 22 is used to support the seat plate 3 and further ensure the stability of the seat plate 3 when the height is adjusted. The trainee can also adjust the height when sitting on the seat plate 3.

[0046] Specifically, the horizontal displacement adjustment mechanism includes a second positioning pin, a slide bar 23, a second adjustment plate 24 and a slide plate 25, both ends of the slide bar 23 and the second adjustment plate 24 are fixedly connected to the frame 1, the slide bar 23 and the second adjustment plate 24 are both arranged along the first direction, the slide plate 25 is slidably arranged on the slide bar 23, and the bottom end of the first support plate 8 is fixedly connected to the slide plate 25;

[0047] The second adjustment plate 24 is provided with a plurality of second adjustment holes 26 along the first direction, the second positioning pin includes a second dial plate 27, a second pull rod 28 and a second pin 29 for plugging and cooperating with the second adjustment hole 26, one end of the second dial plate 27 is hinged to the first support plate 8 and the top end of the second pull rod 28 respectively, the hinge points of the second dial plate 27 and the first support plate 8, and the hinge points of the second dial plate 27 and the second pull rod 28 are arranged in sequence along the first direction, the bottom end of the second pull rod 28 is hinged to the second pin 29, a mounting plate 30 is fixed to the bottom of the first support plate 8, a second fixed shell 31 is fixed to the mounting plate 30, a third sliding hole 32 and a fourth sliding hole 33 which are connected are provided in the second fixed shell 31, the third sliding hole 32 is located near the second fixed shell 31 Near one end of the second shift plate 27, the diameter of the third sliding hole 32 is smaller than the diameter of the fourth sliding hole 33, a third pull rod 34 is fixed to the top of the second latch 29, the third pull rod 34 passes through the fourth sliding hole 33 and the third sliding hole 32 in sequence and is slidably connected to the second fixed shell 31, a second pressure block 35 is fixed to the outer wall of the third pull rod 34, the second pressure block 35 is slidably located in the fourth sliding hole 33, the diameter of the second pressure block 35 is larger than the diameter of the fourth sliding hole 33, a second spring 36 is sleeved on the outer wall of the third pull rod 34, the second spring 36 is located in the fourth sliding hole 33 between the second pressure block 35 and the third sliding hole 32, one end of the second spring 36 is connected to the second pressure block 35, the other end of the second spring 36 is connected to the inner wall of the second fixed shell 31, and the outer diameter of the second spring 36 is larger than the diameter of the third sliding hole 32.

[0048] When the second spring 36 is in a natural state, the second pin 29 is located outside the second fixed shell 31, and the second pin 29 is inserted into a second adjustment hole 26. When the horizontal position of the seat plate 3 needs to be adjusted, the trainee shifts the second shift plate 27 away from one end of the mounting plate 30, and pulls the second pull rod 28 through the second shift plate 27. The second pull rod 28 drives the second pressure block 35 and the second pin 29 to move. As the movement progresses, the second pin 29 gradually moves out of the second adjustment hole 26, and the second pressure block 35 compresses the second spring 36. At this time, the seat plate 3 can move along the slide rail; after the seat plate 3 is moved to the desired position, the second shift plate 27 is released. At this time, the second pressure block 35 loses its pulling force, and the second pressure block 35 will move in the direction close to the second adjustment hole 26 under the elastic force of the second spring 36. The second pressure block 35 drives the second pin 29 to be inserted into the corresponding second adjustment hole 26, and the seat plate 3 is fixed, completing the adjustment of the horizontal position of the seat plate 3.

[0049] Specifically, there are two sliding rods 23, which are respectively located on both sides of the second adjustment plate 24. Linear bearings are slidably arranged on the outer walls of the sliding rods 23. The two ends of the sliding plate 25 are respectively fixed to the two linear bearings. A through hole is opened in the middle position of the sliding plate 25. The area of the through hole is larger than the cross-sectional area of the second adjustment plate 24, and the second adjustment plate 24 passes through the through hole.

[0050] Specifically, the first direction is the direction in which the swing arm 4 and the seat plate 3 are arranged on the frame 1, that is, Figure 2 In the left and right directions shown, the distance between the seat plate 3 and the swing arm 4 is adjusted by a horizontal adjustment mechanism.

[0051] Specifically, a second support plate 37 is fixed to the side of the first support plate 8 away from the seat plate 3. A leg-pressing roller 38 is retractably provided on the top of the second support plate 37. The trainee can warm up with the leg-pressing roller 38 before training to stretch the legs, waist, joint muscles and ligaments, help the body gradually enter a state of exercise, and help prevent sports injuries. The second positioning pin is located on the side of the second support plate 37 away from the first support plate 8, and the second shift plate 27 is hinged to the first support plate 8 through the second support plate 37.

[0052] Specifically, an adjustment groove 39 is vertically provided in the second support plate 37, the leg-pressing roller 38 is rotatably mounted on the insertion rod 40, the insertion rod 40 is slidably set in the adjustment groove 39, and a plurality of third adjustment holes 41 are provided on the insertion rod 40 along the length direction of the insertion rod 40; the second support plate 37 is provided with an adjustment pin that is plugged into and matched with the third adjustment hole 41.

[0053] Specifically, the adjusting pin includes a third fixed shell 42, a third latch 45 and a pulling rod 47. The third fixed shell 42 is provided with a sliding groove 43 that passes through one end of the third fixed shell 42. The third fixed shell 42 is provided with one end of the sliding groove 43 that is fixedly connected to the second support plate 37. The sliding groove 43 is connected to the adjusting groove 39. The other end of the third fixed shell 42 is provided with a sliding hole 44 that is connected to the sliding groove 43. The diameter of the sliding hole 44 is smaller than the diameter of the sliding groove 43. The third latch 45 is slidably arranged in the sliding groove 43. One end of the pulling rod 47 is fixedly connected to the third latch 45. Then, the other end of the pulling rod 47 passes through the sliding hole 44 and extends to the outside of the third fixed shell 42 and is fixed with a pulling block 46. The outer wall of the third latch 45 is fixed with a third pressing block 48. The third pressing block 48 is slidably set in the sliding groove 43, and the diameter of the third pressing block 48 is larger than the diameter of the sliding hole 44. The outer wall of the pulling rod 47 is sleeved with a third spring 49. The third spring 49 is located in the sliding groove 43, and the outer diameter of the third spring 49 is larger than the diameter of the sliding hole 44. One end of the third spring 49 is connected to the third pressing block 48, and the other end of the third spring 49 is connected to the inner wall of the third fixed shell 42. When the third spring 49 is in a natural state, the third latch 45 is inserted into the third adjustment hole 41. When the height of the leg press roller 38 needs to be adjusted, the third latch 45 is separated from / inserted into the third adjustment hole 41 by pulling / releasing the pulling block 46. The use principle of the adjustment pin is the same as that of the first and second positioning latches, which will not be repeated here.

[0054] Although embodiments of the present utility model have been shown and described, various changes, modifications, substitutions, and variations can be made to these embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. Triceps press-down trainer, characterized in that: It includes a frame (1), an adjusting pull rod (2), a seat plate (3) installed on the frame (1), and two swing arms (4) respectively hinged to the frame (1). The two swing arms (4) are respectively located on both sides of the seat plate (3). One end of the swing arm (4) close to the seat plate (3) is provided with a handle (5). The other end of the swing arm (4) is hinged with an adjusting arm (6). A barbell shaft (7) is fixed on the adjusting arm (6). The hinge point between the swing arm (4) and the frame (1) is located between the adjusting arm (6) and the handle (5). One end of the adjusting pull rod (2) is hinged to the frame (1), and the other end of the adjusting pull rod (2) is hinged to the adjusting arm (6).

2. The three-head pressing trainer according to claim 1, characterized in that: The bottom end of the adjusting arm (6) is hinged to the swing arm (4). The barbell shaft (7) is fixed at the top of the adjusting arm (6). The hinge point between the adjusting pull rod (2) and the adjusting arm (6) is located between the swing arm (4) and the barbell shaft (7). The hinge point between the adjusting pull rod (2) and the frame (1) is located above the hinge point between the swing arm (4) and the frame (1).

3. The three-head pressing trainer according to claim 1, wherein: The seat plate (3) is installed on the first support plate (8) through a height adjusting mechanism. The bottom end of the first support plate (8) is connected to the frame (1) through a horizontal displacement adjusting mechanism.

4. The three-head pressing trainer according to claim 3, characterized in that: The height adjusting mechanism includes at least one set of connecting rods (9), a first adjusting plate (10), and a first positioning pin. A fixed plate (13) is fixed at the bottom of the seat plate (3). One set of connecting rods (9) includes two connecting rods (9). The two connecting rods (9) are arranged vertically. One end of the connecting rod (9) is hinged to the fixed plate (13), and the other end of the connecting rod (9) is hinged to the first support plate (8). The first adjusting plate (10) is fixed on one side of the first support plate (8) close to the seat plate (3). A plurality of first adjusting holes (12) are arranged vertically on the first adjusting plate (10). The first positioning pin includes a first dial plate (14), a first pull rod (15), and a first pin (16) for plugging and matching with the first adjusting hole (12). One end of the first dial plate (14) is respectively hinged to the fixed plate (13) and the first pull rod (15). The hinge point between the first dial plate (14) and the fixed plate (13) and the hinge point between the first dial plate (14) and the first pull rod (15) are arranged vertically. The first dial plate (14) is located at one end of the fixed plate (13) away from the first support plate (8). The first pull rod (15) fixes the first pin (16) at the end away from the first dial plate (14). The first pull rod (15) is slidably connected to the fixed plate (13).

5. The three-head pressing trainer according to claim 4, wherein: One end of the fixed plate (13) close to the first support plate (8) is fixed with a first fixed shell (17). A first sliding hole (18) and a second sliding hole (19) which are communicated with each other are arranged in the first fixed shell (17). The first sliding hole (18) is located at one end of the first fixed shell (17) close to the first shifting plate (14). The diameter of the first sliding hole (18) is smaller than that of the second sliding hole (19). One end of the first pull rod (15) far from the first shifting plate (14) sequentially passes through the first sliding hole (18) and the second sliding hole (19) and is slidably connected with the first fixed shell (17). A first pressing block (20) is fixed on the outer wall of the first pull rod (15). The first pressing block (20) is slidably located in the second sliding hole (19). The diameter of the first pressing block (20) is larger than that of the first sliding hole (18). A first spring (21) is sleeved on the outer wall of the first pull rod (15). The first spring (21) is located in the second sliding hole (19) between the first pressing block (20) and the first sliding hole (18). One end of the first spring (21) is connected with the first pressing block (20), and the other end of the first spring (21) is connected with the inner wall of the first fixed shell (17). The outer diameter of the first spring (21) is larger than that of the second sliding hole (19).

6. The three-head pressing trainer according to claim 5, characterized in that: There are two fixed plates (13). The two fixed plates (13) are arranged in parallel and there is a space between the two fixed plates (13). The first pull rod (15), the first shifting plate (14), the first fixed shell (17) and the first insertion pin (16) are all located between the two fixed plates (13); The height adjusting mechanism includes two groups of connecting rods (9). The two groups of connecting rods (9) are respectively connected with the two fixed plates (13), and the two groups of connecting rods (9) are symmetrically arranged; A gas spring (22) is arranged on one side of at least one fixed plate (13). One end of the gas spring (22) is hinged with the fixed plate (13), and the other end of the gas spring (22) is hinged with the first support plate (8).

7. The three-head pressing trainer according to claim 3, wherein: The horizontal displacement adjusting mechanism includes a second positioning insertion pin, a sliding rod (23), a second adjusting plate (24) and a sliding plate (25). Both ends of the sliding rod (23) and the second adjusting plate (24) are fixedly connected with the frame (1). The sliding rod (23) and the second adjusting plate (24) are both arranged along the first direction. The sliding plate (25) is slidably arranged on the sliding rod (23). The bottom end of the first support plate (8) is fixedly connected with the sliding plate (25); The second adjusting plate (24) is provided with a plurality of second adjusting holes (26) along a first direction. The second positioning pin includes a second dial plate (27), a second pull rod (28), and a second pin (29) for plugging and cooperating with the second adjusting hole (26). One end of the second dial plate (27) is respectively hinged to the first support plate (8) and the top of the second pull rod (28). The hinge points of the second dial plate (27) with the first support plate (8) and the second pull rod (28) are arranged in sequence along the first direction. The bottom end of the second pull rod (28) is hinged to the second pin (29). A mounting plate (30) is fixed to the bottom of the first support plate (8). The second pin (29) is slidably connected to the mounting plate (30).

8. The three-head press-down trainer according to claim 7, wherein: A second fixed shell (31) is fixed to the mounting plate (30). A third sliding hole (32) and a fourth sliding hole (33) which are communicated with each other are arranged in the second fixed shell (31). The third sliding hole (32) is located at one end of the second fixed shell (31) close to the second dial plate (27). The diameter of the third sliding hole (32) is smaller than that of the fourth sliding hole (33). A third pull rod (34) is fixed to the top end of the second pin (29). The third pull rod (34) sequentially passes through the fourth sliding hole (33) and the third sliding hole (32) and is slidably connected to the second fixed shell (31). A second pressing block (35) is fixed to the outer wall of the third pull rod (34). The second pressing block (35) is slidably located in the fourth sliding hole (33). The diameter of the second pressing block (35) is larger than that of the fourth sliding hole (33). A second spring (36) is sleeved on the outer wall of the third pull rod (34). The second spring (36) is located in the fourth sliding hole (33) between the second pressing block (35) and the third sliding hole (32). One end of the second spring (36) is connected to the second pressing block (35), and the other end of the second spring (36) is connected to the inner wall of the second fixed shell (31). The outer diameter of the second spring (36) is larger than the diameter of the third sliding hole (32).

9. The three-head press-down trainer according to claim 7, characterized in that: A second support plate (37) is fixed to the side of the first support plate (8) away from the seat plate (3). A leg pressing roller (38) is telescopically arranged at the top of the second support plate (37). The second positioning pin is located on the side of the second support plate (37) away from the first support plate (8). The second dial plate (27) is hinged to the first support plate (8) through the second support plate (37).

10. The three-head pressing trainer according to claim 9, characterized in that: An adjusting groove (39) is arranged vertically in the second support plate (37). The leg pressing roller (38) is rotatably mounted on a plug rod (40). The plug rod (40) is slidably arranged in the adjusting groove (39). A plurality of third adjusting holes (41) are arranged on the plug rod (40) along the length direction of the plug rod (40). An adjusting pin for plugging and cooperating with the third adjusting hole (41) is arranged on the second support plate (37).

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