Foldable portable arm strength training instrument

Abstract

The utility model discloses a foldable portable arm strength training apparatus, which relates to the technical field of sports equipment, and comprises a first training plate, a second training plate, a folding positioning component, an elastic resetting component and an arm strength frame, the folding positioning assembly has a rotating folding state and a positioning state which can be switched mutually, and rotation of the first training plate relative to the second training plate can be limited in the positioning state; symmetrical axial grooves are formed in the two sides of the first training plate, and the elastic reset assemblies are fixed in the axial grooves respectively; the arm strength frames are symmetrically fixed to the elastic reset assembly, and during training, the arm strength frames can move in the axial groove direction under stress. The arm strength training instrument can be folded and unfolded for use, is convenient to carry and small in occupied area, one set of human hands can be independently trained in an activity site, and the technical problems that an existing device is heavy in mass, cannot be moved, can only be used for training in a fixed site and cannot meet the training requirements of multiple persons at the same time are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sports equipment, and specifically relates to a foldable portable arm strength training instrument, which is especially suitable for teaching use. BACKGROUND

[0002] Physical fitness is to use sports to exercise the body, and sports take physical movement as the basic performance form, give each organ, system with a certain amount and intensity of stimulation through scientific combination of physical exercise, promote a series of adaptability response and optimization change in the development of body shape structure, and enhance the physique.

[0003] With the development of society, sports equipment is also diversified, especially arm strength training equipment is various, such as the patent literature with announcement number CN206660463U, CN218187705U discloses different arm strength training devices respectively, but careful analysis finds that the existing arm strength training device is heavy, and basically all fixed use, which leads to great occupation of training site, not only makes the training site accommodate limited equipment, but also makes people only train in fixed site.In addition, in the school, due to the site reason, the quantity of arm strength training device is also less, which makes only a few people carry out physical training at a time, which cannot train simultaneously like basketball and football, more people need to queue, which greatly influences the training efficiency, and cannot effectively meet the training requirements of students.

[0004] Therefore, it is necessary to develop a training equipment which can be folded and unfolded, and is convenient to carry and move, so as to meet the purpose of training of many people in different sites at the same time. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a foldable portable arm strength training instrument to overcome the above technical problems existing in the prior art, which can be folded and unfolded for use, is convenient to carry, has smaller floor area, and can be used for individual training with one set in the activity site, so as to solve the technical problems of heavy weight, immobility, fixed site training and the inability to meet the training requirements of many people at the same time of the existing arm strength training device.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The application discloses a foldable portable arm strength training device, which comprises a first training plate, a second training plate, a folding positioning assembly, an elastic reset assembly and an arm strength frame.

[0008] The folding positioning assembly comprises a connecting seat, a rotating frame and a pluggable positioning disc.

[0009] The rotating frame is annular, and symmetric through holes are formed in the rotating frame.

[0010] An insertion hole is formed in the rotating shaft and communicates with the accommodating groove.

[0011] The elastic reset assembly comprises a positioning block, a guide rod, a guide pipe, a reset spring and a sliding block for fixing the arm strength frame.

[0012] A plurality of force adjusting grooves are formed in the groove bottom of the axial groove.

[0013] The arm strength frame comprises a U-shaped frame and a holding rod.

[0014] The U-shaped frame is connected with the sliding block through a clamping structure, the clamping structure comprises a clamping piece fixed on the end of the U-shaped frame and a clamping groove opened on the side of the sliding block, the clamping piece comprises a clamping column, a pressing block, a clamping block, a connecting rod and an elastic piece, the length of the pressing block is greater than that of the clamping block, the pressing block and the clamping block are fixed into a linkage structure through the connecting rod, the linkage structure is symmetrically arranged on the clamping column, the axial lines of the pressing block and the clamping block are perpendicular to the axial line of the clamping column, the elastic piece is arranged between the pressing blocks, and the pressing block and the clamping block are telescopically arranged on the clamping column through the elastic piece; the U-shaped frame is fixed on the sliding block through the clamping block clamped into the clamping groove.

[0015] The clamping column comprises an integral connecting section and a clamping section, the connecting section is fixed on the U-shaped frame, the diameter of the clamping section is smaller than that of the connecting section, the pressing block is located on the connecting section, and the clamping block is located on the clamping section.

[0016] The upper end of the U-shaped frame is provided with an adjusting cavity for accommodating a holding rod, symmetrical guide grooves are opened on the two sides of the adjusting cavity, a plurality of limiting holes are opened on the upper portion of the adjusting cavity, the end of the holding rod is detachably fixed with a sleeve ring, the holding rod is fixedly connected with the sleeve ring through the guide grooves after being inserted into the adjusting cavity, a threaded hole matched with the limiting hole is arranged on the sleeve ring, and the threaded hole is matched with different limiting holes through bolts to control the telescopic movement of the holding rod on the U-shaped frame.

[0017] The arm strength training device has the advantages that:

[0018] 1. The arm strength training device is connected through the folding positioning assembly between the first training plate and the second training plate, so that the arm strength training device can be folded and positioned at a required angle, thereby being convenient to move, carry, stack and reducing space occupation, and enabling students to adjust the device to different angles for arm strength training according to requirements.

[0019] 2. The arm strength training device can be used for arm strength training by pulling the arm strength frame, and the arm strength frames on the two sides can be installed and dismounted, so that the arm strength frames can be conveniently replaced.

[0020] 3. The arm strength training device can adjust the position of the force adjusting block in the different force adjusting grooves according to requirements before training, so as to adjust the compression force of the reset spring, thereby adjusting the training intensity, being beneficial to meeting the training requirements of students with different physical conditions, and achieving better training effect.

[0021] 4、The utility model discloses when carrying out arm strength training can also adjust the length of holding pole, be favorable to satisfy the student of different age stage and carry out training, and can reach better training effect.

[0022] 5、The utility model discloses in addition to arm strength training, still can carry out other training through the angle between the first training board and the second training board, for example, still can carry out push -ups, sit -ups training on the training board. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the three -dimensional structure schematic diagram of the utility model's unfolded state;

[0024] Figure 2 It is the three -dimensional structure schematic diagram of the utility model's use state;

[0025] Figure 3 It is the three -dimensional structure schematic diagram of the utility model's folded state;

[0026] Figure 4 It is the three -dimensional structure schematic diagram of folding positioning assembly;

[0027] Figure 5 It is Figure 4 Explosive structure schematic diagram;

[0028] Figure 6 It is the three -dimensional assembly structure schematic diagram of arm strength frame and first training board;

[0029] Figure 7 It is the three -dimensional sectional view of elastic reset component;

[0030] Figure 8 It is the three -dimensional structure schematic diagram of arm strength frame;

[0031] Figure 9 It is the three -dimensional sectional view of clamping part.

[0032] Marked as in the drawing: 1, first training board, 11, second training board, 12, soft pad, 13, axial slot, 14, intensity adjustment groove, 2, folding positioning assembly, 21, positioning hole, 22, connecting seat, 23, pluggable positioning disc, 24, positioning rod, 25, insertion column, 26, rotating shaft, 27, rotating frame, 3, arm strength frame, 31, holding pole, 32, guide slot, 33, limit hole, 34, sleeve ring, 35, bolt, 36, clamping column, 361, pressing block, 362, elastic piece, 363, connecting rod, 364, clamping block, 4, guide rod, 41, sliding block, 42, positioning block, 43, guide pipe, 44, reset spring, 45, clamping groove, 46, intensity adjustment block. DETAILED DESCRIPTION

[0033] The utility model will be further described below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model, but not to limit the utility model.

[0034] As shown in Figures 1-3 The utility model provides a kind of foldable portable arm strength training instrument, including first training board 1, second training board 11, folding positioning assembly 2, elastic reset component and arm strength frame 3, first training board 1 and second training board 11 can be the square board of identical size, and the length of first training board 1 and second training board 11 is adapted to the height of training personnel with second training board 11.The first training board 1 and second training board 11 are connected by two sets of folding positioning assembly 2 of symmetrical arrangement between two ends between first training board 1 and second training board 11.Two sets of folding positioning assembly 2 are located between first training board 1 and second training board 11 respectively.Folding positioning assembly 2 has the rotating folding state and the positioning state of each other switching, first training board 1 can rotate in 360 ° range relative to second training board 11 in rotating folding state, so that the angle between first training board 1 and second training board 11 can be adjusted;Positioning state can limit first training board 1 relative to second training board 11 rotation, so that the angle of adjustment can be fixed to facilitate training.First training board 1 both sides side surface is equipped with symmetrical axial slot 13, and elastic reset component is two sets and is fixed in two axial slots 13 respectively.Arm strength frame 3 is two and is fixed on elastic reset component symmetrically.Training, arm strength frame 3 can compress elastic reset component and move to second training board 11 along the direction of axial slot 13 when being subjected to external force, and arm strength frame 3 can be automatically reset under the reset force of elastic reset component when losing external force, so reciprocating can realize arm strength training.

[0035] According to a preferred embodiment of the utility model, Figures 4-5As shown, the folding positioning assembly 2 comprises a connecting seat 22, a rotating frame 27 and a pluggable positioning disc 23, the connecting seat 22 comprises two seat bodies which are integrally formed by a half-rectangular part and a half-circular part, the middle part of each seat body is fixed with a rotating shaft 26, and the connecting seat 22 of the two sets of folding positioning assemblies 2 is respectively welded and fixed at the end of the first training plate 1 and the end of the second training plate 11 through the half-rectangular part. The two ends of the rotating frame 27 are movably sleeved on the rotating shaft 26 of the connecting seat 22, a plurality of positioning holes 21 are arranged on the outer side surface of the connecting seat 22 and the outer side surface (the surface facing the side surface of the training plate) of the rotating frame 27, a plurality of positioning rods 24 for being inserted into the positioning holes 21 are arranged on the pluggable positioning disc 23, and the pluggable positioning disc 23 can be fixed to the connecting seat 22 by being inserted into the positioning holes 21 through the positioning rods 24. The state switching of the folding positioning assembly 2 can be realized by inserting and pulling out the pluggable positioning disc 23 from the positioning holes 21. Specifically, the folding positioning assembly 2 can be switched to a positioning state after the positioning rods 24 are simultaneously inserted into the positioning holes 21 on the connecting seat 22 and the rotating frame 27, and the folding positioning assembly 2 can be switched to a rotating folding state after the positioning rods 24 are pulled out of the positioning holes 21.

[0036] Further, as shown in the drawings, Figures 4-5 The rotating frame 27 is annular, symmetrical through holes are formed in the rotating frame 27, the positioning holes 21 on the rotating frame 27 are arranged around the through holes, and the rotating frame 27 is movably sleeved on the rotating shaft 26 through the through holes. The outer side surface of the connecting seat 22 is provided with a receiving groove matched with the pluggable positioning disc 23, the positioning holes 21 on the connecting seat 22 are arranged around the groove bottom of the receiving groove, and the pluggable positioning disc 23 is installed in the receiving groove through the positioning rods 24 inserted into the positioning holes 21.

[0037] Further, as shown in the drawings, Figures 4-5 The rotating shaft 26 is further provided with a plug hole communicated with the receiving groove, the middle part of the pluggable positioning disc 23 is fixed with a plug column 25 inserted into the plug hole, and the plug column 25 is inserted into the plug hole after the pluggable positioning disc 23 is installed in the receiving groove. Through the cooperation of the plug column 25 and the plug hole, on the one hand, the stability of the pluggable positioning disc 23 installed in the receiving groove can be improved, and on the other hand, the positioning effect can also be improved.

[0038] According to an optional embodiment of the present application, the outer side surface of the connecting seat 22 is flush with the outer side surface of the training plate, and the outer side surface of the pluggable positioning disc 23 does not exceed the receiving groove, so that the overall structure of the equipment is more standard and beautiful. In addition, in order to facilitate the plugging control of the pluggable positioning disc 23, a protruding stress part can also be fixed on the outer side surface of the pluggable positioning disc 23.

[0039] Through the folding positioning assembly 2, the arm strength training device can be adjusted to different angles for training. For example, when the angle between the first training plate 1 and the second training plate 11 is adjusted to about 180°, the student can push and pull the arm strength frame 3 in the form of a push-up for training. When the angle between the first training plate 1 and the second training plate 11 is adjusted to about 90°-120°, the student can pull the arm strength frame 3 in the form of a sitting position for training. In order to improve the training intensity, the angle between the first training plate 1 and the second training plate 11 can also be adjusted to about 210°-270°, at this time, the student can pull the arm strength frame 3 on the inclined first training plate 1 in the form of a push-up for training. In addition to arm strength training, the first training plate 1 and the second training plate 11 can also be adjusted to realize the training of other sports, for example, push-ups, sit-ups and the like can also be performed on the training plate, the function is more comprehensive, and the practicability is stronger. In addition, since the folding positioning assembly 2 is adopted, the first training plate 1 and the second training plate 11 of the device can be folded together, which is convenient to carry and reduces the space occupation.

[0040] According to another preferred embodiment of the utility model, as shown in Figures 6-7 The elastic reset assembly includes a positioning block 42, a guide rod 4, a guide pipe 43, a reset spring 44 and a sliding block 41 for fixing the arm strength frame 3. The guide rod 4 and the guide pipe 43 are fixed on the sliding block 41 and the positioning block 42 respectively, the guide rod 4 is movably sleeved on the guide pipe 43, and the sliding block 41 can slide on the guide pipe 43 through the guide rod 4. The two ends of the reset spring 44 are located in the guide rod 4 and the guide pipe 43 respectively, the positioning block 42 is clamped in the axial groove 13 and located at one end close to the second training plate 11, and the sliding block 41 is movably arranged in the axial groove 13 and located at one end away from the second training plate 11. Since the arm strength frame 3 is fixed on the sliding block 41, when the arm strength frame 3 is moved towards the second training plate 11 by external force, the sliding block 41 will move towards the positioning block 42 and compress the reset block. When the arm strength frame 3 loses external force, the sliding block 41 and the arm strength frame 3 will automatically reset under the reset force of the reset spring 44, and the reciprocation can realize arm strength training.

[0041] According to another preferred embodiment of the utility model, as shown in Figures 6-7 The bottom of the axial groove 13 is provided with a plurality of force adjusting grooves 14 corresponding to one end of the positioning block 42, and the positioning block 42 is provided with a force adjusting block 46 for inserting into the force adjusting groove 14. The force adjusting block 46 can be inserted into different force adjusting grooves 14, and the force adjusting block 46 is matched with different force adjusting grooves 14 to adjust the elastic force of the reset spring 44 in the elastic reset assembly, so as to adjust the strength of arm strength training, so as to adapt to students of different ages and different physical conditions for training.

[0042] According to another preferred embodiment of the utility model, as shown inFigure 8 As shown in the figure, the arm strength frame 3 comprises a U-shaped frame and a holding rod 31, the lower end of the U-shaped frame is detachably fixed on the sliding block 41, and the upper end of the U-shaped frame is above the first training board 1 and is telescopically connected with the holding rod 31.

[0043] Further, as Figure 9 shown, the U-shaped frame is connected with the sliding block 41 through a clamping structure, the clamping structure comprises clamping pieces fixed on the end of the U-shaped frame, the clamping pieces comprise clamping columns 36, pressing blocks 361, clamping blocks 364, connecting rods 363 and elastic pieces 362, the clamping columns 36, the pressing blocks 361 and the clamping blocks 364 are all cylindrical structures, the clamping columns 36 are internally provided with limiting cavities, the length of the pressing blocks 361 is greater than the length of the clamping blocks 364, the pressing blocks 361 are fixed into a linkage structure with the clamping blocks 364 through the connecting rods 363, the number of the linkage structure is two sets, the two sets of linkage structures are symmetrically arranged on the clamping columns 36 through the limiting cavities, and the axial lines of the pressing blocks 361 and the axial lines of the clamping blocks 364 are all perpendicular to the axial line of the clamping columns 36. The elastic pieces 362 are springs and are arranged between the pressing blocks 361, under the action of the elastic pieces 362, the pressing blocks 361 and the clamping blocks 364 are telescopically arranged on the clamping columns 36, and the end portions of the pressing blocks 361 and the clamping blocks 364 all extend out of the clamping columns 36. When the pressing blocks 361 are pressed, the clamping blocks 364 fixed on the pressing blocks 361 through the connecting rods 363 will be retracted into the clamping columns 36, when the pressing blocks 361 are released, the clamping blocks 364 will automatically extend out of the clamping columns 36 under the action of the elastic pieces 362.

[0044] In addition, as Figure 7 shown, the clamping structure further comprises a clamping groove 45 opened in the side surface of the sliding block 41, a clamping hole compatible with the clamping column 36 is opened in the groove wall of the clamping groove 45, the inner diameter of the clamping groove 45 is compatible with the outer diameter of the end portion of the clamping column 36, and the inner diameter of the clamping hole is compatible with the outer diameter of the clamping block 364. In actual use, first, the pressing blocks 361 are pressed to make the clamping blocks 364 retract into the clamping columns 36, then the clamping columns 36 are inserted into the clamping groove 45, and then the pressing blocks 361 are released to make the clamping blocks 364 extend into the clamping hole, so that the U-shaped frame can be fixed to the sliding block 41. Conversely, the pressing blocks 361 are pressed to make the clamping blocks 364 retract into the clamping columns 36, and then the U-shaped frame is pulled out, so that the U-shaped frame and the sliding block 41 can be quickly disassembled.

[0045] Further, as Figure 8 shown, the clamping column 36 comprises an integrally formed connecting section and a clamping section, the connecting section is welded and fixed on the U-shaped frame, the diameter of the clamping section is smaller than the diameter of the connecting section, the pressing blocks 361 are located on the connecting section, and the clamping blocks 364 are located on the clamping section. The connection stability and reliability between the U-shaped frame and the sliding block 41 can be improved.

[0046] According to still another preferred embodiment of the utility model, as Figure 8As shown, the upper end of the U-shaped frame is provided with an adjusting cavity for accommodating the holding rod 31, symmetric guide grooves 32 are formed on both sides of the adjusting cavity, and a plurality of limiting holes 33 are formed on the upper portion of the adjusting cavity. The end portion of the holding rod 31 is detachably fixed with a sleeve ring 34, for example, the sleeve ring 34 and the holding rod 31 can be fixed through a bolt 35. The holding rod 31 is fixedly connected with the sleeve ring 34 through the guide grooves 32 after being inserted into the adjusting cavity, the sleeve ring 34 is provided with a threaded hole matched with the limiting hole 33, and the threaded hole is matched with different limiting holes 33 through the bolt 35 to control the extension and retraction of the holding rod 31 on the U-shaped frame, so that the length of the holding rod 31 on the U-shaped frame can be adjusted, thereby meeting the training of students of different age groups and achieving better training effect.

[0047] According to an optional embodiment of the utility model, as Figures 1-3 As shown, in order to improve the comfort of training, soft pads 12 can also be arranged on the first training plate 1 and the second training plate 11.

[0048] It should be noted that the main body structure of the utility model can be made of aluminum alloy, so that the instrument has high structural strength and light weight, is especially suitable for teaching one set of hands to carry out individual training in an activity field, and has better practicability.

[0049] The implementation principle of the utility model is:

[0050] As shown in the figure, Figure 1 When the arm strength training in the push-up mode is needed, the first training plate 1 and the second training plate 11 can be unfolded to 180°, at this time, the arm strength frame 3 can be pulled on the soft pad 12 in the push-up mode to carry out training.

[0051] As shown in the figure, Figure 2 When the arm strength training in the sitting position mode is needed, the second training plate 11 can be lifted upwards to drive one end of the rotating frame 27 to rotate along the rotating shaft 26, according to the required condition, the inclination angle of the second training plate 11 is adjusted to 90°-120° and a backrest is formed, and then the pluggable positioning disc 23 is inserted into the positioning hole 21 to realize the fixation of the second training plate 11.

[0052] As shown in the figure, Figure 3 When the use is finished and the storage is needed, the pluggable positioning disc 23 is pulled out first to release the limiting between the first training plate 1 and the second training plate 11, the first training plate 1 and the second training plate 11 are folded along the rotating frame 27 to reduce the occupied space, and the storage and carrying are facilitated.

[0053] As shown in the figure, Figures 1-3As shown in Figs. 6-7, during training, the arm strength frame 3 can be pulled along the axial slot 13 to drive the guide rod 4 to slide along the guide pipe 43, compress the internal reset spring 44, and pull back to achieve the training effect. When the training intensity needs to be adjusted, the strength adjustment block 46 can be pulled out of the strength adjustment slot 14 first, and then the position of the positioning block 42 is moved to the direction of the sliding block 41 to drive the guide pipe 43 to slide and compress the reset spring 44, thereby reducing the initial length of the reset spring 44 and increasing the compression strength. Then, the strength adjustment block 46 is inserted into the corresponding strength adjustment slot 14 to limit and fix the strength adjustment block 46, so as to realize the adjustment of the training intensity.

[0054] The above is only a specific implementation of the present application, and any feature disclosed in the specification can be replaced by other equivalent or similar purpose replacement features unless specifically described. All features disclosed or steps in all methods or processes can be combined in any way except for mutually exclusive features and / or steps.

Claims

1. A foldable portable arm strength training apparatus, characterized by: The utility model relates to a training device, including first training board (1), second training board (11), folding positioning assembly (2), elastic reset component and arm strength frame (3), first training board (1) with second training board (11) between through two sets of symmetrical folding positioning assembly (2) connection, folding positioning assembly (2) have each other switchable rotating folding state and positioning state, rotating folding state under first training board (1) relative second training board (11) can rotate in 360 range, positioning state under can limit first training board (1) relative second training board (11) rotate, the both sides of first training board (1) are set up with the symmetry axial slot (13), and elastic reset component is fixed in axial slot (13) respectively, arm strength frame (3) is fixed on elastic reset component symmetry, and arm strength frame (3) force can move along axial slot (13) direction when training.

2. A foldable portable arm strength training apparatus according to claim 1, characterized in that: The folding positioning assembly (2) includes a connecting seat (22), a rotating frame (27) and a pluggable positioning disc (23), the connecting seat (22) is fixed on the end of the first training board (1) and the end of the second training board (11) respectively, the both ends of the rotating frame (27) are movably sleeved on the connecting seat (22), a plurality of positioning holes (21) are arranged on the connecting seat (22) and the rotating frame (27), and a plurality of positioning rods (24) for being inserted into the positioning holes (21) are arranged on the pluggable positioning disc (23); the folding positioning assembly (2) is switched to the positioning state after the positioning rods (24) are simultaneously inserted into the positioning holes (21) on the connecting seat (22) and the rotating frame (27), and the folding positioning assembly (2) is switched to the rotating folding state after the positioning rods (24) are pulled out of the positioning holes (21).

3. A foldable portable arm strength training apparatus according to claim 2, characterized in that: The middle part of the connecting seat (22) is fixed with a rotating shaft (26), the rotating frame (27) is annular, a plurality of symmetrical through holes are arranged on the rotating frame (27), and the rotating frame (27) is movably sleeved on the rotating shaft (26) through the through holes; a containing groove matched with the pluggable positioning disc (23) is arranged on the outer side of the connecting seat (22), and the positioning holes (21) are arranged on the groove bottom of the containing groove and the outer side of the rotating frame (27) respectively; the pluggable positioning disc (23) is installed in the containing groove by being inserted into the positioning holes (21) through the positioning rods (24).

4. A foldable portable arm strength training apparatus according to claim 3, characterized in that: A plug hole communicated with the containing groove is arranged on the rotating shaft (26), and a plug column (25) for being inserted into the plug hole is fixed in the middle part of the pluggable positioning disc (23).

5. The foldable portable arm strength training apparatus according to claim 1, wherein: The elastic reset component includes a positioning block (42), a guide rod (4), a guide pipe (43), a reset spring (44) and a sliding block (41) for fixing the arm strength frame (3), the guide rod (4) and the guide pipe (43) are fixed on the sliding block (41) and the positioning block (42) respectively, the guide rod (4) is movably sleeved on the guide pipe (43), the both ends of the reset spring (44) are located in the guide rod (4) and the guide pipe (43) respectively, the positioning block (42) is clamped in the axial slot (13) and located at one end close to the second training board (11), and the sliding block (41) is movably arranged in the axial slot (13) and located at one end away from the second training board (11).

6. A foldable portable arm strength training apparatus according to claim 5, characterized in that: The bottom of the axial slot (13) is provided with a plurality of force adjusting slots (14), and the positioning block (42) is provided with a force adjusting block (46) for inserting into the force adjusting slot (14), and the force adjusting block (46) cooperates with different force adjusting slots (14) to adjust the elastic force of the elastic reset assembly.

7. A foldable portable arm strength training apparatus according to claim 6, characterized in that: The arm strength frame (3) comprises a U-shaped frame and a holding rod (31), the lower end of the U-shaped frame is detachably fixed on the sliding block (41), and the upper end is located above the first training plate (1) and is telescopically connected with the holding rod (31).

8. A foldable portable arm strength training apparatus according to claim 7, characterized in that: The U-shaped frame and the sliding block (41) are connected through a clamping structure, the clamping structure comprises clamping pieces fixed on the end of the U-shaped frame and clamping grooves (45) opened on the side surface of the sliding block (41), the clamping piece comprises a clamping column (36), a pressing block (361), a clamping block (364), a connecting rod (363) and an elastic piece (362), the length of the pressing block (361) is greater than the length of the clamping block (364), the pressing block (361) and the clamping block (364) are fixed into a linkage structure through the connecting rod (363), the linkage structure is symmetrically arranged on the clamping column (36), the axis lines of the pressing block (361) and the clamping block (364) are perpendicular to the axis line of the clamping column (36); the elastic piece (362) is arranged between the pressing blocks (361), and the pressing block (361) and the clamping block (364) are telescopically arranged on the clamping column (36) through the elastic piece (362); the U-shaped frame is clamped into the clamping groove (45) through the clamping block (364) and fixed on the sliding block (41).

9. A foldable portable arm strength training apparatus according to any one of claims 7-8, characterized in that: The upper end of the U-shaped frame is provided with an adjusting cavity for accommodating the holding rod (31), symmetric guide grooves (32) are opened on both sides of the adjusting cavity, and a plurality of limiting holes (33) are opened in the upper part of the adjusting cavity; the end of the holding rod (31) is detachably fixed with a sleeve ring (34), the holding rod (31) is fixedly connected with the sleeve ring (34) through the guide grooves (32) after being inserted into the adjusting cavity, the sleeve ring (34) is provided with a threaded hole matched with the limiting hole (33), and the threaded hole is matched with different limiting holes (33) through the bolt (35) to control the telescoping of the holding rod (31) on the U-shaped frame.

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