Sitting type pectoral muscle pushing and lifting strength training device

Abstract

The invention relates to the field of fitness equipment, in particular to a sitting type pectoral muscle pushing and lifting strength training device. The sitting type pectoral muscle pushing and lifting strength training device comprises a supporting cross beam, the supporting cross beam is of a horizontally-extending structure, a backup plate supporting plate is fixedly installed at one end of the supporting cross beam in the length direction, a reinforcing plate is fixedly installed at the other end of the supporting cross beam, and a bent part extending in the direction of the backup plate supporting plate is integrally formed at the top of the reinforcing plate; and one end, far away from the reinforcing plate, of the bending part is fixedly connected with one side of the backup plate supporting plate. According to the sitting type pectoral muscle pushing and lifting strength training device, multi-stage adjustment is achieved through the resistance adjusting assembly, a threaded rod can be driven to rotate through a driving gear and a driven gear by rotating an adjusting knob, a toothed plate horizontally moves and is meshed with the driving gear to rotate, and then the abutting strength of a positioning wheel and a pull rope is adjusted; the tension degree of the tension rope is changed to achieve resistance grading change, the resistance requirements of different crowds such as novice and advancer can be met, and the application range is greatly widened.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fitness equipment, in particular to a sitting chest press strength training device. BACKGROUND

[0002] With the improvement of the whole people fitness consciousness, various types of strength training equipment are widely used in family, gymnasium and other scenes, among which the sitting chest press training device becomes one of the popular training equipment because it can specifically exercise chest muscles, shoulders and arm muscles. However, the existing sitting chest press training device still has many defects in actual use: firstly, the force transmission structure of part of the training device is not reasonably designed, and single guide wheel or simple rope transmission is mostly used, which leads to the problems of easy deviation and serious friction of the pulling rope in the movement process. Not only will it cause the rope to wear out quickly, but also the gravity of the counterweight cannot be stably transmitted to the pressing component, resulting in the situation of training resistance "stuck" or "large and small", which affects the training effect; secondly, the resistance adjustment function is limited, and most training devices can only adjust the resistance by increasing or decreasing the number of counterweights, which cannot be adjusted in multiple levels, and it is difficult to meet the needs of different training levels of users (such as beginners and advanced users) for resistance gradient, so the application range is narrow.

[0003] Therefore, it is necessary to provide a new sitting chest press strength training device to solve the above technical problems. SUMMARY

[0004] In order to overcome the defects of the prior art, a sitting chest press strength training device is provided to solve the above problems.

[0005] The sitting chest muscle push-up strength training device comprises a support beam, which is a horizontally extending structure, one end of the length direction of the support beam is fixedly installed with a backrest support plate, the other end is fixedly installed with a reinforcing plate, the top of the reinforcing plate is integrally formed with a bending part extending to the backrest support plate, and the end of the bending part away from the reinforcing plate is fixedly connected with one side of the backrest support plate; a counterweight box is installed on one side of the support beam, and the counterweight box is movably provided with stackable counterweight blocks inside, the top of the counterweight block is connected with a tension rope, the other end of the tension rope is connected with one side of the backrest support plate; a resistance adjusting assembly is installed on one side of the backrest support plate, and the resistance adjusting assembly is in abutment with the outside of the tension rope, the tension degree of the tension rope can be changed by operating the resistance adjusting assembly, thereby realizing multi-stage adjustment of the training resistance; a guide assembly is arranged on one side of the counterweight box, the tension rope is wound on the guide assembly to realize force transmission between the counterweight block and the resistance adjusting assembly; the backrest support plate and the reinforcing plate are jointly installed with a swing rod, the top of the swing rod is connected with a transmission rod on both sides, the ends of the two transmission rods away from the swing rod are respectively connected with push-up rods, and the top of the two push-up rods is rotatably connected with the top of the backrest support plate; the resistance adjusting assembly comprises a positioning plate installed on one side of the backrest support plate, the positioning plate is jointly installed with a threaded rod through mounting blocks on both ends of one side of the positioning plate, the outside of the threaded rod is threadedly connected with a toothed plate, the bottom of the toothed plate is engagedly connected with a gear, the same side of the two gears is connected with the positioning plate through a gear support, the opposite ends of the two gears are respectively installed with positioning racks, the same side of the two positioning racks is installed with a positioning wheel, and the outside of the two positioning wheels is in abutment with the outside of the tension rope.

[0006] Preferably, the resistance adjusting assembly further comprises a driven gear installed at one end of the outside of the threaded rod, one side of the driven gear is engagedly connected with a driving gear, and one end of the driving gear is connected with an adjusting knob through a connecting shaft penetrating the positioning plate.

[0007] Preferably, the two positioning wheels are arranged in an up-down distribution.

[0008] Preferably, one side of the toothed plate is slidably connected with the positioning plate.

[0009] Preferably, the guide assembly comprises a first guide wheel installed on the inner top wall of the counterweight box, a second guide wheel is installed on one side of the inner top wall of the counterweight box, a third guide wheel is installed below the outside bottom of the counterweight box, a fourth guide wheel is installed on one side of the support beam close to the third guide wheel, and a fifth guide wheel is installed on one side of the bottom of the swing rod.

[0010] Preferably, one end of the tension rope is fixedly connected to the counterweight block inside the counterweight box, and the other end is sequentially connected to the bottom of one side of the backrest support plate via the first guide wheel, the second guide wheel, the third guide wheel, the fourth guide wheel, one of the positioning wheels, the fifth guide wheel, and the other positioning wheel, so as to realize the continuous force transmission between the counterweight block, the guide assembly, the resistance adjustment assembly and the swing rod, and ensure that the tension rope synchronously drives the counterweight block to move when the lifting rod is operated.

[0011] Preferably, a backrest and a headrest are installed on the side of the backrest support plate away from the reinforcing plate.

[0012] Preferably, a seat support frame is installed at the bottom of the backrest support plate on the side away from the support beam, and a seat cushion is installed on the top of the seat support frame.

[0013] Compared with related technologies, the seated chest press strength training device provided by this invention has the following beneficial effects:

[0014] This invention achieves multi-level adjustment through a resistance adjustment component. Rotating the adjustment knob drives the threaded rod to rotate via the driving gear and driven gear, causing the toothed plate to move horizontally and mesh with the driving gear to rotate. This adjusts the contact force between the positioning wheel and the tension rope, changing the tension of the tension rope to achieve graded resistance changes. This can meet the resistance needs of different groups such as beginners and advanced users, greatly expanding the scope of application.

[0015] This invention uses a multi-guide wheel design to precisely guide the resistance rope, effectively avoiding problems such as rope deviation, friction, or slackness. This ensures that the weight of the counterweight is stably and losslessly transmitted to the swing arm and the lifting arm, achieving synchronous linkage between the "lifting action - resistance rope - counterweight". This completely solves the problem of resistance jamming in existing equipment, making training movements more fluid and improving training effectiveness. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the seated chest press strength training device provided by the present invention.

[0017] Figure 2 for Figure 1 The diagram shows the structure viewed from the left.

[0018] Figure 3 for Figure 1 The diagram shown is a front view of the structure.

[0019] Figure 4 for Figure 1 A schematic diagram of one of the resistance adjustment components shown;

[0020] Figure 5 for Figure 1Structure diagram of the second resistance adjusting assembly shown;

[0021] Figure 6 For Figure 1 Structure diagram of the guiding assembly shown.

[0022] Reference numerals in the drawing: 1, support beam; 11, backrest support plate; 12, reinforcing plate; 13, swing rod; 14, transmission rod; 15, push rod; 2, counterweight box; 21, counterweight; 3, positioning plate; 31, threaded rod; 32, toothed plate; 33, gear; 34, positioning frame; 35, positioning wheel; 36, driven gear; 37, driving gear; 4, first guide wheel; 41, second guide wheel; 42, third guide wheel; 43, fourth guide wheel; 44, fifth guide wheel. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are merely used to explain the present application and are not intended to limit the present application.

[0024] The specific implementation of the present application is described in detail below with reference to specific examples.

[0025] The embodiment of the present application provides a sitting chest muscle push-up strength training device, which comprises a support beam 1, the support beam 1 is horizontally extended, one end of the length direction of the support beam 1 is fixedly installed with a backrest support plate 11, the other end is fixedly installed with a reinforcing plate 12, the top of the reinforcing plate 12 is integrally formed with a bending part extending to the backrest support plate 11, and the end, away from the reinforcing plate 12, of the bending part is fixedly connected with one side of the backrest support plate 11; a counterweight box 2 is installed on one side of the support beam 1, and the counterweight box 2 is movably provided with stackable counterweight blocks 21 inside, the top of the counterweight block 21 is connected with a tension rope, the other end of the tension rope is connected with one side of the backrest support plate 11; a resistance adjusting assembly is installed on one side of the backrest support plate 11, and the resistance adjusting assembly is in abutment with the outside of the tension rope, the tension degree of the tension rope can be changed by operating the resistance adjusting assembly, so that multi-stage adjustment of training resistance is realized; a guide assembly is arranged on one side of the counterweight box 2, the tension rope is arranged on the guide assembly, so that force transmission between the counterweight block 21 and the resistance adjusting assembly is realized; the backrest support plate 11 and the reinforcing plate 12 are jointly installed with a swing rod 13, the top of the swing rod 13 is connected with a transmission rod 14 on both sides, the ends, away from the swing rod 13, of the two transmission rods 14 are respectively connected with push-up rods 15, and the top of the two push-up rods 15 is rotatably connected with the top of the backrest support plate 11; the resistance adjusting assembly comprises a positioning plate 3 installed on one side of the backrest support plate 11, the positioning plate 3 is jointly installed with screw rods 31 through mounting blocks on both ends of one side, the outside of the screw rod 31 is threadedly connected with a toothed plate 32, the bottom of the toothed plate 32 is engagedly connected with a gear 33, the same side of the two gears 33 is connected with the positioning plate 3 through a gear support, the opposite ends of the two gears 33 are respectively installed with positioning racks 34, the same side of the two positioning racks 34 is installed with positioning wheels 35, the outside of the two positioning wheels 35 is in abutment with the outside of the tension rope, the resistance adjusting assembly further comprises a driven gear 36 installed on the outside of one end of the screw rod 31, one side of the driven gear 36 is engagedly connected with a driving gear 37, one end of the driving gear 37 is connected with an adjusting knob through a connecting shaft penetrating the positioning plate 3, the two positioning wheels 35 are distributed in an up-down mode, and one side of the toothed plate 32 is slidingly connected with the positioning plate 3.

[0026] It needs to be explained that: first, the support beam 1 as the basic support structure of the whole trainer, in the form of horizontal extension, the length direction one end fixedly installed backrest support plate 11, both for installing subsequent resistance adjusting assembly, swing rod and other components, but also can provide the support basis for the user to rely on the back, the other end fixedly installed reinforcing plate 12 is through the bending part extending to the backrest support plate 11 direction of the top, with the backrest support plate 11 one side fixed connection, further enhance the stability of the support beam 1 and the backrest support plate 11 connection, avoid the structure to shake in the training process;The weight box 2 installed on one side of the support beam 1, the inside movable setting of the stackable weight block 21 is the core source of training resistance, the one end of the tension rope connected with the top of the weight block 21 is connected with one side of the backrest support plate 11, which is used to convert the gravity of the weight block 21 into resistance during training, and the guide assembly is arranged on one side of the weight box 2, and the tension rope is wound on the guide assembly, which can guide the transmission direction of the tension rope, ensure that the gravity of the weight block 21 can be stably and accurately transmitted to the resistance adjusting assembly, avoid the transmission effect of the influence of the deviation of the tension rope;The resistance adjusting assembly is the key to realize the multi-stage adjustment of the training resistance, and the positioning plate 3 installed on one side of the backrest support plate 11 provides an installation carrier for the whole adjusting assembly, the two ends of the screw rod 31 (arranged horizontally) installed on one side of the positioning plate 3 through the mounting block, can realize rotation under the meshing transmission of the driving gear 37 and the driven gear 36, when the user rotates the adjusting knob, the adjusting knob drives the driving gear 37 to rotate through the connecting shaft, the driving gear 37 drives the driven gear 36 to rotate, and then drives the horizontally arranged screw rod 31 to rotate;Since the tooth plate 32 is connected with the outer thread of the screw rod 31, and the tooth plate 32 is horizontally slidably connected with the positioning plate 3 on one side, when the screw rod 31 rotates, the tooth plate 32 will move horizontally along the positioning plate 3;During the horizontal movement of the tooth plate 32, the tooth plate 32 will be engaged with the top and bottom gears 33 (two gears 33 are connected with the positioning plate 3 through the gear bracket, to ensure the position stability during rotation) respectively, and then drive the two gears 33 to rotate synchronously;The positioning frame 34 installed on the relatively far end of the gear 33 will change the angle with the rotation of the gear 33, thereby driving the positioning wheel 35 (two positioning wheels 35 are arranged in an upper and lower distribution) installed on the same side of the positioning frame 34 to adjust the abutting force of the outer side of the tension rope, and the multi-stage adjustment of the training resistance is realized by changing the tension degree of the tension rope, to meet the needs of different users for training intensity;In addition, the swing rod 13 installed between the backrest support plate 11 and the reinforcing plate 12 is an intermediate transmission of force, the transmission rod 14 connected with the top of the swing rod 13 on both sides will transmit the pushing force to the swing rod 13 when the user pushes the push rod, and the push rod 15 connected with the transmission rod 14 on the far end of the swing rod 13, the top of which is rotatably connected with the top of the backrest support plate 11, the user holds the push rod 15 with both hands and pushes outward, which can drive the transmission rod 14, the swing rod 13 to move, and then drive the weight block 21 to move through the tension rope, complete the chest muscle push-up training action, realize the strength training of the chest muscle.

[0027] In the embodiment of the present application, the guide assembly comprises a first guide wheel 4 mounted on the inner top wall of the counterweight box 2, a second guide wheel 41 mounted on one side of the first guide wheel 4, a third guide wheel 42 mounted below the second guide wheel 41 on the outer bottom of the counterweight box 2, a fourth guide wheel 43 mounted on one side of the support beam 1 close to the third guide wheel 42, a fifth guide wheel 44 mounted on one side of the bottom of the swing rod 13, one end of the tension rope fixedly connected with the counterweight 21 in the counterweight box 2, and the other end sequentially passing through the first guide wheel 4, the second guide wheel 41, the third guide wheel 42, the fourth guide wheel 43, one of the positioning wheels 35, the fifth guide wheel 44 and the other positioning wheel 35, and fixedly connected with one side of the bottom of the backrest support plate 11, so as to realize the continuous force transmission of the counterweight 21, the guide assembly, the resistance adjusting assembly and the swing rod 13, and ensure that the tension rope synchronously drives the counterweight 21 to move when the operation lifting rod 15 is operated.

[0028] It should be noted that the first guide wheel 4 is directly installed on the inner top wall of the counterweight box 2 as the first "turning point" of the tension rope extending from the counterweight block, which can guide the tension rope to turn from the vertical direction to the horizontal direction to avoid friction between the tension rope and the inner wall of the counterweight box; the second guide wheel 41 is also installed on the inner top wall of the counterweight box 2 and located on one side of the first guide wheel 4, which further adjusts the horizontal transmission direction of the tension rope to accurately align the transmission path outside the counterweight box, preparing for the subsequent passage out of the counterweight box; the third guide wheel 42 is installed on the bottom of the outer side of the counterweight box 2 and directly below the second guide wheel 41, which can turn the tension rope from the horizontal direction to the vertical downward direction again and then guide it to the transmission path on one side of the support beam to realize smooth transition of the tension rope between "in the box and out of the box"; the fourth guide wheel 43 is installed on one side of the support beam 1 and close to the third guide wheel 42, which mainly functions to receive the tension rope transmitted by the third guide wheel 42 and adjust the transmission direction of the tension rope from the vertical downward direction to the horizontal direction towards one side of the backrest support plate 11 to provide direction guidance for the tension rope entering the resistance adjusting assembly; the fifth guide wheel 44 is installed on the bottom of one side of the swing rod 13 as the key node of the tension rope connecting the swing rod, which can turn the horizontally transmitted tension rope to make the tension rope stretch and contract synchronously with the movement of the swing rod to ensure effective force transmission between the swing rod and the tension rope. The transmission path of the tension rope is the core of realizing the coherent force transmission of "counterweight block 21-guide assembly-resistance adjusting assembly-swing rod 13": one end of the tension rope is fixedly connected with the counterweight block 21 in the counterweight box 2 and moves synchronously with the counterweight block 21; the other end first extends upwards to bypass the first guide wheel 4, completes the first turning, extends horizontally to the second guide wheel 41 and bypasses it, adjusts the direction, then passes out of the counterweight box 2 downward, bypasses the third guide wheel 42 on the bottom of the outer side of the counterweight box, extends along the direction of the support beam 1 after turning, moves towards the resistance adjusting assembly after turning through the fourth guide wheel 43, then successively bypasses one of the positioning wheels 35 in the resistance adjusting assembly, the fifth guide wheel 44 at the bottom of the swing rod 13 and the other positioning wheel 35, and finally is fixed on the bottom of one side of the backrest support plate 11. This multi-guide wheel coordinated transmission path design can effectively avoid deviation, friction or relaxation of the tension rope during transmission to ensure that the gravity of the counterweight block 21 can be stably and losslessly transmitted to the resistance adjusting assembly and the swing rod 13, thereby realizing the effect of "synchronously moving the counterweight block 21 when operating the lifting rod 15", when the user pushes the lifting rod 15, the force is transmitted to the swing rod 13 through the transmission rod 14, the swing rod 13 moves the fifth guide wheel 44, thereby pulling the tension rope, and the tension rope pulls the counterweight block 21 upwards through the guidance of each guide wheel. The whole process is coherent and has no jamming, which provides a key guarantee for the smoothness of the training action and the stability of the resistance.

[0029] In the embodiment of the present application, the backrest support plate 11 is respectively provided with a back cushion and a head cushion on the side away from the reinforcing plate 12, and is provided with a seat support frame on the bottom of the side away from the support beam 1, and the top of the seat support frame is provided with a seat cushion.

[0030] It should be noted that the backrest support plate 11 is respectively provided with a back cushion and a head cushion on the side away from the reinforcing plate 12, wherein the back cushion is attached to the back of the user, can provide uniform support for the back, relieve the pressure of the back muscles during training, and avoid discomfort caused by the back being suspended or insufficiently supported; the head cushion corresponds to the position of the user's head, can lift the head, prevent the head from leaning forward or shaking during training, help the user maintain the correct training posture, and at the same time reduce the burden of the neck muscles. In addition, the backrest support plate 11 is provided with a seat support frame on the bottom of the side away from the support beam 1, which serves as the installation basis of the seat cushion, provides firm support for the seat cushion through stable structural design, avoids the seat cushion from deviating or collapsing during use; and the seat cushion installed on the top of the seat support frame is directly in contact with the user's hips, and the soft and elastic material can disperse the pressure on the hips, reduce the feeling of oppression caused by long sitting, so that the user can maintain a comfortable state during the entire training period, focus more on the completion of the chest muscle lifting action, and further improve the training experience.

[0031] The working principle of the sitting chest muscle push-up strength training device provided by the application is as follows: first, the user adjusts the resistance according to the training needs, rotates the adjusting knob of the resistance adjusting assembly, the adjusting knob drives the driving gear 37 to rotate through the connecting shaft, the driving gear 37 meshes with the driven gear 36 to rotate, and then drives the horizontally arranged threaded rod 31 to rotate; since the toothed plate 32 is threadedly connected with the threaded rod 31 and is in horizontal sliding fit with the positioning plate 3, the threaded rod 31 drives the toothed plate 32 to move horizontally along the positioning plate 3 when rotating, and the toothed plate 32 meshes to drive the top and bottom gears 33 to rotate synchronously; when the gear 33 rotates, the positioning frame 34 at the end thereof adjusts the angle, so that the positioning wheel 35 on the positioning frame 34 changes the abutting force with the tension rope, the tension degree of the tension rope is adjusted to complete multi-stage adjustment of the resistance, and the required training resistance is reached. The user sits on the cushion on the top of the seat support frame, the back is attached to the back cushion on the backrest support plate 11, the head is attached to the head cushion to keep a stable posture, and the hands hold the push-up rods 15 on both sides; then, the user exerts force to push the push-up rods 15 outward, since the top of the push-up rod 15 is rotationally connected with the backrest support plate 11, the push-up rod 15 swings outward around the rotation point, and drives the swing rod 13 to move synchronously through the end transmission rod 14; when the swing rod 13 moves, the fifth guide wheel 44 at the bottom thereof moves, and then pulls the tension rope wound thereon; the tension rope is guided along the preset path by the guide wheels, and finally pulls the weight blocks 21 in the weight box 2 to vertically rise, at this time, the gravity of the weight blocks 21 is converted into reverse resistance through the tension rope, and the reverse resistance acts on the push-up rod 15, so that the user needs to overcome the resistance to complete the push-up action, and the chest muscle, shoulder and arm muscle are exercised. Reset and cycle training: after the user completes a push-up action, the user gradually relaxes the push force, the weight blocks 21 vertically descend under the action of the gravity, the guide wheels and transmission components are reset in the reverse direction through the tension rope, the tension rope drives the fifth guide wheel 44 to reset, so that the swing rod 13 returns to the initial position, the swing rod 13 drives the push-up rod 15 to swing inward around the rotation point through the transmission rod 14, and returns to the initial state; the user repeats the above “pushing-reset” action, and can perform cycle training until the preset training times are completed. In the whole process, the guide assembly ensures the transmission direction of the tension rope to be accurate, the resistance adjusting assembly maintains the resistance to be stable, the comfort component ensures the posture of the user to be correct, and the components are cooperated to realize efficient and safe chest muscle push-up training.

[0032] The above only describes the embodiments of the application, and does not limit the patent range of the application, and any equivalent structure or equivalent flow transformation obtained by using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the application.

Claims

1. A seated chest press strength trainer characterized by, The utility model relates to a training device for back muscles, which comprises a support beam (1), a counterweight box (2) and a resistance adjusting assembly. The support beam (1) is a horizontally extending structure, one end of which is fixedly provided with a backrest support plate (11), and the other end is fixedly provided with a reinforcing plate (12), the top of the reinforcing plate (12) is integrally provided with a bending part extending towards the backrest support plate (11), and the end of the bending part away from the reinforcing plate (12) is fixedly connected to one side of the backrest support plate (11). The counterweight box (2) is arranged on one side of the support beam (1), and the counterweight box (2) is movably provided with stackable counterweight blocks (21) inside, the top of the counterweight block (21) is connected to a tension rope, and the other end of the tension rope is connected to one side of the backrest support plate (11). The resistance adjusting assembly is arranged on one side of the backrest support plate (11), and the resistance adjusting assembly is in abutment with the outside of the tension rope, so that the tension degree of the tension rope can be changed by operating the resistance adjusting assembly, thereby realizing multi-stage adjustment of the training resistance. A guide assembly is arranged on one side of the counterweight box (2), and the tension rope is wound on the guide assembly to realize force transmission between the counterweight block (21) and the resistance adjusting assembly. The backrest support plate (11) and the reinforcing plate (12) are jointly provided with a swing rod (13), the top of the swing rod (13) is connected to a transmission rod (14) on both sides, the other end of the transmission rod (14) is connected to a lifting rod (15), and the top of the lifting rod (15) is rotatably connected to the top of the backrest support plate (11). The resistance adjusting assembly comprises a positioning plate (3) arranged on one side of the backrest support plate (11), the positioning plate (3) is provided with a threaded rod (31) at both ends on one side through a mounting block, the outside of the threaded rod (31) is threadedly connected to a toothed plate (32), the bottom of the toothed plate (32) is engagedly connected to a gear (33), the same side of the gear (33) is connected to the positioning plate (3) through a gear support, the opposite end of the gear (33) is provided with a positioning frame (34), the same side of the positioning frame (34) is provided with a positioning wheel (35), and the outside of the positioning wheel (35) is in abutment with the outside of the tension rope.

2. The seated chest press force trainer of claim 1, wherein, The resistance adjusting assembly further comprises a driven gear (36) arranged on one end of the outside of the threaded rod (31), one side of the driven gear (36) is engagedly connected to a driving gear (37), and one end of the driving gear (37) is connected to an adjusting knob through a connecting shaft penetrating the positioning plate (3).

3. The seated chest press force trainer of claim 1, wherein, The two positioning wheels (35) are arranged in an up-down distribution.

4. The seated chest press force trainer of claim 1, wherein, One side of the toothed plate (32) is slidably connected to the positioning plate (3).

5. The seated chest press force trainer of claim 1, wherein, The guide assembly comprises a first guide wheel (4) mounted on the inner top wall of the counterweight box (2), a second guide wheel (41) mounted on one side of the first guide wheel (4), a third guide wheel (42) mounted below the second guide wheel (41) on the outer side of the bottom of the counterweight box (2), a fourth guide wheel (43) mounted on one side of the support beam (1) close to the third guide wheel (42), and a fifth guide wheel (44) mounted on one side of the bottom of the swing rod (13).

6. The seated chest press force trainer of claim 1 or 5, wherein, One end of the tension rope is fixedly connected with the counterweight block (21) in the counterweight box (2), and the other end is sequentially connected with the first guide wheel (4), the second guide wheel (41), the third guide wheel (42), the fourth guide wheel (43), one of the positioning wheels (35), the fifth guide wheel (44), the other positioning wheel (35), and the bottom of one side of the backrest support plate (11) to realize the coherent force transmission of the counterweight block (21), the guide assembly, the resistance adjusting assembly, and the swing rod (13) and ensure that the tension rope moves synchronously with the counterweight block (21) when the operation lifting rod (15) is operated.

7. The seated chest press force trainer of claim 1, wherein, The backrest support plate (11) is provided with a back cushion and a head cushion on the side away from the reinforcing plate (12).

8. The seated chest press force trainer of claim 1, wherein, The backrest support plate (11) is provided with a seat support frame on the bottom of the side away from the support beam (1), and the seat support frame is provided with a seat cushion on the top.

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