Lower limb trainer

Abstract

The utility model discloses a lower limb trainer, and relates to the technical field of training instruments. The base is arranged on the bottom frame; the seat assembly is arranged on the base in a sliding manner; the adjusting assembly is arranged in the base, the adjusting assembly is connected with the seat assembly, and the position of the seat assembly on the base can be adjusted through the adjusting assembly; the pedal assembly is arranged on the base in a sliding mode, the pedal assembly is connected with the counterweight assembly, and the counterweight assembly is arranged on the base and can provide load for the pedal assembly; the blocking mechanism is arranged on the base, and the blocking mechanism can provide training resistance. The device can be suitable for people of different heights to use, training resistance can be provided, and the training effect is better.

Description

Technical Field

[0001] This application relates to the field of training equipment technology, specifically to a lower limb training device. Background Technology

[0002] Lower limb trainers are commonly used lower limb exercise devices, typically consisting of a seat and foot pedals. When using them, the user sits on the seat and presses the foot pedals with both feet, exercising the lower limbs through the movement of the pedals. However, existing lower limb trainers have a fixed seat position, which cannot be adjusted to suit users of different heights, thus affecting the training effect to some extent.

[0003] Therefore, it is necessary to improve existing lower limb training devices. Utility Model Content

[0004] In view of this, this application provides a lower limb training device to solve the technical problem in the prior art where the seat position is fixed, making it impossible for people of different heights to adjust it according to their actual situation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A lower limb training device, comprising:

[0007] A base, the lower end of which is fitted with a base frame;

[0008] A seat assembly, which is slidably disposed on the base;

[0009] An adjustment component is disposed within the base and connected to the seat assembly, allowing the position of the seat assembly on the base to be adjusted via the adjustment component.

[0010] A foot pedal assembly, which is slidably mounted on the base, is connected to a counterweight assembly, which is mounted on the base.

[0011] A blocking mechanism is provided at the left end of the base and at the left end of the foot pedal assembly. The blocking mechanism includes a mounting box, a baffle, a first resistance component, and a pair of second resistance components. The mounting box is mounted on the base. The baffle is slidably disposed on the mounting box and abuts against the first resistance component and the pair of second resistance components. The foot pedal assembly abuts against the baffle, causing the baffle to drive the first resistance component and the pair of second resistance components to move.

[0012] Furthermore, the adjustment component includes:

[0013] A rotating rod, which is rotatably mounted on the base of the base;

[0014] A screw, which is rotatably mounted in the housing, is connected to the rotating rod via a transmission assembly;

[0015] A movable seat, which is threadedly connected to the screw and slidably connected to the seat body;

[0016] Mounting bracket, which connects the movable seat and the seat plate of the seat assembly.

[0017] Furthermore, the adjustment assembly also includes a locking component, wherein a turntable is provided at the front end of the rotating rod, and the locking component can be connected between the turntable and the base to lock the rotating rod.

[0018] Furthermore, the locking assembly includes a pin that can pass through a hole on the turntable and be inserted into a slot in the base.

[0019] Further, the first resistance component includes:

[0020] A slide block is slidably engaged with a housing disposed within the mounting box. A first roller is provided on the inner side of the baffle, and the first roller abuts against the slide block.

[0021] A first compression spring is connected between the slide and the mounting box.

[0022] Furthermore, the second resistance component includes:

[0023] A slider is slidably disposed within the housing, and the first roller of the baffle abuts against the slider;

[0024] A connecting rod that extends into the housing and is connected to the slider;

[0025] A second compression spring is sleeved on the inner end of the connecting rod and abuts against the slider and the housing.

[0026] A swing block, which is pivotally connected to the mounting box, and the outer end of the connecting rod abuts against the swing block;

[0027] A push rod, which is slidably engaged with the mounting box and abuts against the swing block;

[0028] A third compression spring abuts against the top rod and the mounting box;

[0029] A tension spring is connected between the mounting box and the swing block.

[0030] Furthermore, the foot pedal assembly includes:

[0031] Mounting plate;

[0032] A pair of foot pedals are disposed opposite to each other on the mounting plate;

[0033] A pair of elastic bands are attached to the respective foot pedals.

[0034] Furthermore, the footrest includes a base plate and a pair of side plates, the base plate being disposed on the mounting plate, the pair of side plates being symmetrically disposed on the base plate, and the elastic band connecting the pair of side plates.

[0035] Furthermore, a support rod is provided at the bottom of the mounting plate, and a movable block is connected to the lower end of the support rod. The movable block can slide on the slide rail on the base and can abut against the baffle.

[0036] Furthermore, the counterweight assembly includes:

[0037] A container basket, the container basket being capable of holding a counterweight;

[0038] A pull rope connects the container basket to the movable block;

[0039] A guide wheel is mounted on the base of the base, and the pull rope passes around the guide wheel.

[0040] As can be seen from the above technical solution, the advantages of this utility model are:

[0041] 1. In this application, the seat assembly and the adjustment assembly are used together. The position of the seat assembly can be adjusted by the adjustment assembly, so that the user can adjust it according to their own height during training. The adjustment assembly is easy to operate.

[0042] 2. In this application, the foot pedal component is used in conjunction with the weight component, enabling different groups of people to carry different weights for lower limb training, thereby improving the training effect.

[0043] 3. This application also includes a blocking mechanism, which can provide resistance to improve training effect and prevent the foot pedal assembly from rigidly colliding with the base, making it safer to use. Attached Figure Description

[0044] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0045] Figure 1 This is a schematic diagram of the structure of this application.

[0046] Figure 2 for Figure 1 A magnified view of part A.

[0047] Figure 3 for Figure 1 A magnified view of section B.

[0048] Figure 4 This is a top view of the base of this application.

[0049] Figure 5 This is a partial cross-sectional view of the adjustment component of this application.

[0050] Figure 6 This is a schematic diagram of the foot pedal assembly of this application.

[0051] Figure 7 This is a state diagram used in this application.

[0052] Figure 8 for Figure 5 A partial structural diagram.

[0053] Figure 9 This is a top sectional view of the blocking mechanism of this application.

[0054] Figure 10 for Figure 9 A magnified view of a portion of point D.

[0055] Explanation of reference numerals in the attached drawings: 1-Base frame; 2-Base; 21-Seat body; 211-Mounting groove; 212-Slot; 22-Cover plate; 221-Moving groove; 3-Seat assembly; 31-Seat plate; 32-Backrest plate; 4-Adjustment assembly; 41-Turntable; 411-Socket; 42-Rotating rod; 43-First bevel gear; 44-Second bevel gear; 45-Screw; 46-Limiting rod; 47-Moving seat; 48-Mounting seat; 49-Pin; 5-Foot pedal assembly; 51-Mounting plate; 52-Foot pedal seat; 521-Side plate; 522-Base plate; 523-Limiting baffle; 524-Anti-slip block; 53-Elastic band; 54-Support rod; 6-Slide rail; 61-Limiting block; 7-Moving block; 8-Pull rope; 9-Housing basket; 10-Counterweight block ; 11-Bracket; 12-Guide wheel; 13-Buffer pad; 14-Blocking mechanism; 141-Mounting box; 1411-First sliding hole; 1412-Second sliding hole; 142-Baffle; 1421-Moving rod; 1422-First roller; 1423-Second guide rod; 143-Housing; 1431-First through hole; 1432-Second through hole; 144-Slider; 1441-Connecting rod; 1442-Second compression spring; 145-Swing block; 1451-Tension spring; 1452-Top rod; 1453-Second roller; 1454-Blocking pad; 1455-Third compression spring; 146-Mounting block; 147-Slide seat; 1471-First guide rod; 1472-Arc groove; 148-First compression spring. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0057] refer to Figures 1 to 10 ,like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9As shown, this embodiment provides a lower limb trainer, including: a base frame 1, a base 2, a seat assembly 3, an adjustment assembly 4, a foot pedal assembly 5, a counterweight assembly, and a blocking mechanism 14. The base frame 1 can be placed on the ground, the base 2 is installed on the upper end of the base frame 1, the seat assembly 3 is installed on the base 2 and can slide relative to the base 2, the adjustment assembly 4 is installed inside the base 2 and is connected to the seat assembly 3. By operating the adjustment assembly 4, the position of the seat assembly 3 on the base 2 can be adjusted. When the position of the seat assembly 3 on the base 2 is different, it can meet the needs of people of different heights to use the trainer for exercise. The foot pedal assembly 5 is slidably disposed on the base 2, and is disposed at the left end of the base 2 relative to the seat assembly 3. The seat assembly 3 is disposed at the right end of the base 2, and the counterweight assembly is disposed at the right end of the base 2. The foot pedal assembly 5 is connected to the counterweight assembly, and the counterweight assembly can provide adjustable load to the foot pedal assembly 5. Through weight training, the training intensity of the lower limbs can be increased, thereby accelerating the training process. By adjusting the counterweight, the intensity of lower limb training can be increased, thereby effectively improving the training effect and accelerating the training process. The weighted components allow trainees to flexibly adjust the training intensity according to their actual situation and needs, achieving better training results. The blocking mechanism 14 is mounted on the base 2 and located at the left end of the foot pedal assembly 5. The blocking mechanism 14 provides training resistance to the foot pedal assembly 5. Specifically, the blocking mechanism 14 includes: a mounting box 141, a baffle 142, a first resistance component, and a pair of second resistance components. The mounting box 141 is mounted on the base 2 and located to the left of the moving block 7. The baffle 142 is slidably connected to the mounting box 141 and abuts against the first resistance component and the pair of second resistance components. When the trainee's feet are on the foot pedal 52 for lower limb training, the moving block 7 moves to the left along with the foot pedal 52. When the moving block 7 moves to near its limit position, it squeezes the baffle 142, causing the baffle 142 to drive the first resistance component and the pair of second resistance components to move elastically. Therefore, the elastic effect increases the resistance during training, thereby improving the training effect.

[0058] like Figure 10 As shown, the first resistance assembly includes: a slide 147 and a first compression spring 148. A housing 143 is installed inside the mounting box 141. A first through hole 1431 and a second through hole 1432 are respectively opened at the left and right ends of the housing 143. The slide 147 is slidably engaged with the second through hole 1432. The inner side of the baffle 142 (i.e., Figure 10 A first roller 1422 is provided on the left side of the housing 143. The first roller 1422 can abut against the slide 147. A first through hole 1431 is used to allow the first roller 1422 to enter the housing 143. A first compression spring 148 is connected between the slide 147 and the left inner wall of the mounting box 141.

[0059] The inner side of the baffle 142 is provided with a moving rod 1421 and a pair of second guide rods 1423, with the pair of second guide rods 1423 spaced apart. The moving rod 1421 is located between the pair of second guide rods 1423. Correspondingly, a first sliding hole 1411 and a pair of second sliding holes 1412 are provided on the right side wall of the mounting box 141. The moving rod 1421 is adapted to the first sliding hole 1411, and the second guide rods 1423 are adapted to the corresponding second sliding holes 1412.

[0060] In addition, a plurality of first guide rods 1471 are installed on the inner left side of the mounting box 141. The first guide rods 1471 slide in cooperation with the slide block 147 to enhance the stability of the slide block 147's movement. An arc-shaped groove 1472 is provided at the right end of the slide block 147, and the first roller 1422 can be held in the arc-shaped groove 1472.

[0061] Preferably, a wear-resistant pad is provided in the arc-shaped groove 1472. By providing the wear-resistant pad, the wear between the first roller 1422 and the slide block 147 can be reduced, and the service life can be extended.

[0062] like Figure 10 As shown, the second resistance assembly includes: a slider 144, a connecting rod 1441, a second compression spring 1442, a swing block 145, a push rod 1452, a third compression spring 1455, and a tension spring 1451. The slider 144 is slidably disposed within the housing 143, and a pair of sliders 144 are symmetrically arranged front and rear. A first roller 1422 abuts against the pair of sliders 144. The connecting rod 1441 is connected to the end of the slider 144 away from the center of the housing 143. The second compression spring 1442 is sleeved on the connecting rod 1441, and the second compression spring 1452... 442 is held between slider 144 and housing 143; swing block 145 is pivotally connected inside mounting box 141, left end of swing block 145 is connected to tension spring 1451, connecting rod 1441 abuts against one side of right end of swing block 145, and the other side of right end of swing block 145 abuts against top rod 1452, top rod 1452 slides with mounting box 141; third compression spring 1455 is held between top rod 1452 and mounting box 141; tension spring 1451 is connected between mounting box 141 and left end of swing block 145.

[0063] Specifically, the mounting box 141 also includes a pair of symmetrically arranged blocking pads 1454 and a pair of mounting blocks 146. The pair of mounting blocks 146 are located between the pair of blocking pads 1454. A third compression spring 1455 is connected between the push rod 1452 and the blocking pads 1454. The push rod 1452 is slidably connected within the mounting blocks 146. Through the sliding engagement between the push rod 1452 and the mounting blocks 146, the movement of the push rod 1452 can be made more stable. A tension spring 1451 is connected between the left end of the swing block 145 and the mounting block 146.

[0064] Preferably, a second roller 1453 is installed on the end of the push rod 1452 away from the third compression spring 1455, and the second roller 1453 abuts against the right end of the swing block 145.

[0065] In this embodiment, the base 2 includes a seat 21 and a cover plate 22 mounted on the seat 21. The cover plate 22 is detachable, so that the adjustment component 4 can be easily installed inside the seat 21.

[0066] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8 As shown, the adjustment assembly 4 includes: a rotating rod 42, a screw 45, a movable seat 47, and a mounting seat 48. The rotating rod 42 is rotatably mounted on the seat body 21 via a pair of bearings. The front end of the rotating rod 42 extends out of the seat body 21, and a turntable 41 is mounted on the front end of the rotating rod 42. The screw 45 is mounted in the mounting groove 211 of the seat body 21 via two bearing seats. The movable seat 47 is located in the mounting groove 211 and is slidably connected to the seat body 21. The movable seat 47 is threadedly connected to the screw 45. The lower end of the mounting seat 48 is connected to the movable seat 47, and the upper end of the mounting seat 48 is connected to the seat plate 31 of the seat assembly 3.

[0067] Preferably, the cover plate 22 has a movable groove 221, and the upper end of the movable seat 47 passes through the movable groove 221 and is connected to the bottom of the mounting seat 48.

[0068] Preferably, two parallel limiting rods 46 are installed in the mounting groove 211. The limiting rods 46 are arranged parallel to the screw 45. The movable seat 47 slides with the two limiting rods 46, so that the movable seat 47 can move relatively smoothly and reliably.

[0069] In this embodiment of the application, the transmission assembly includes a first bevel gear 43 and a second bevel gear 44 that mesh with each other. The first bevel gear 43 is connected to the rear end of the rotating rod 42, and the second bevel gear 44 is connected to the screw 45.

[0070] like Figure 2 As shown, the adjustment component 4 also includes a locking component, which can be connected between the turntable 41 and the base 21 to lock the rotating rod 42.

[0071] Specifically, the locking component includes a pin 49, and the turntable 41 has a number of holes 411 arranged in a ring. The pin 49 can pass through the holes 411 and be inserted into the slot 212 of the seat body 21, so that the turntable 41 cannot rotate, thereby fixing the position of the seat component 3.

[0072] Preferably, the seat assembly 3 includes a seat plate 31 and a backrest plate 32 that are connected to each other. It is more comfortable and safer for the user to sit on the seat plate 31 and lean against the backrest plate 32 when exerting force.

[0073] In use, first pull out the pin 49, then rotate the turntable 41 so that the rotating rod 42 drives the screw 45 to rotate through the transmission component. Then, the moving seat 47 drives the seat plate 31 to move horizontally under the sliding limit of a pair of limit rods 46, thereby adjusting the position of the seat plate 31. After the seat plate 31 is properly adjusted, the pin 49 is inserted into the slot 212 after passing through the insertion hole 411, so that the seat assembly 3 and the seat body 21 can be fixed.

[0074] like Figure 1 and Figure 6 As shown, the pedal assembly 5 includes: a mounting plate 51, a pair of pedal seats 52 and a pair of elastic bands 53. The pair of pedal seats 52 are disposed opposite to each other on the mounting plate 51, and the elastic bands 53 are connected to the corresponding pedal seats 52.

[0075] like Figure 6 As shown, the foot pedal 52 includes a base plate 522 and a pair of side plates 521. The base plate 522 is mounted on the mounting plate 51, and the pair of side plates 521 are symmetrically mounted on the base plate 522. An elastic band 53 is connected between the pair of side plates 521.

[0076] Preferably, the base plate 522 is also provided with a limiting baffle 523 and several anti-slip blocks 524. The limiting baffle 523 can block the toe of the shoe, and the anti-slip blocks 524 can increase the anti-slip effect, thereby preventing the foot from falling off the footrest 52 when the lower limb exerts force, thus improving the safety of use and the effectiveness of training.

[0077] like Figure 3 As shown, a support rod 54 is provided at the bottom of the mounting plate 51, and a movable block 7 is connected to the lower end of the support rod 54. The movable block 7 is slidably connected to the slide rail 6 on the base 2, and when the movable block 7 moves to near its limit position, it can abut against the baffle 142. A limiting block 61 is provided at the end of the slide rail 6 to prevent the movable block 7 from disengaging.

[0078] like Figure 1 and Figure 2 As shown, the counterweight assembly includes a receiving basket 9 and guide wheels 12. The receiving basket 9 has an opening on its side, through which the counterweight block 10 can be placed and removed, allowing the receiving basket 9 to bear different weights. A pull rope 8 connects the moving block 7 and the receiving basket 9. The guide wheels 12 are mounted on the base 21 via a bracket 11. The pull rope 8 passes around the guide wheels 12, which guide the pull rope 8, making the movement of the receiving basket 9 and the moving block 7 smoother and safer. Additionally, a buffer pad 13 is provided on the base frame 1, which cushions the receiving basket 9.

[0079] like Figure 7 As shown, the user adjusts component 4 according to their height to position the seat component 3 appropriately. The user then sits on the seat 31, leans against the backrest 32, and places their feet on the two footrests 52. By pushing forward with their lower limbs, the user moves the footrests 52, causing the pull rope 8 to move forward and pull up the basket 9. Different training intensities are adjusted by placing different numbers of weights 10 inside the basket 9. When the lower limbs retract, the basket 9 moves downward under the weight, finally landing on the cushioning pad 13. This repetitive leg-pushing motion trains the lower limbs.

[0080] While the footrest 52 is facing forward (referring to the direction of vision, i.e.) Figure 1 When the pedal is pressed (on the left side), the foot pedal 52 drives the moving block 7 to move synchronously. When the moving block 7 moves to the extreme position near the left end, the moving block 7 will squeeze the baffle 142. The baffle 142 will drive the moving rod 1421 and a pair of second guide rods 1423 to move to the left. The second guide rods 1423 can make the movement of the baffle 142 more stable. The leftward movement of the moving rod 1421 will squeeze the slide 147 and a pair of sliders 144. The slide 147 will slide along the first guide rod 1471 and squeeze the first compression spring 148, so that the first compression spring 148 is compressed. The pair of sliders 144 will move away from each other, so the sliders 144 will drive the connecting rod 1441 to move, so that the second compression spring 1442 is compressed and pushes the swing block 145 to swing. The swing block 145 swings and stretches the tension spring 1451, while pushing the top rod 1452 to squeeze the third compression spring 1455. Thus, both the second compression spring 1442 and the third compression spring 1455 are compressed. Therefore, the blocking mechanism 14 increases resistance during movement, thereby improving training effectiveness. Additionally, the right end face of the limiting block 61 is slightly to the right of the mounting box 141. This ensures that when the first compression spring 148, the second compression spring 1442, and the third compression spring 1455 are compressed to near their limits, the moving block 7 will abut against the limiting block 61, preventing excessive compression and damage to the springs. Simultaneously, the blocking mechanism 14 also prevents the moving block 7 from rigidly colliding with the limiting block 61 on the base 2, ensuring safe and stable operation between the foot pedal assembly 5 and the base 2.

[0081] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lower limb training device, characterized in that, include: The base (2) has a base frame (1) installed at its lower end. Seat assembly (3), which is slidably disposed on the base (2); Adjustment component (4), the adjustment component (4) is disposed in the base (2), the adjustment component (4) is connected to the seat assembly (3), and the position of the seat assembly (3) on the base (2) can be adjusted by the adjustment component (4); Foot pedal assembly (5), the foot pedal assembly (5) is slidably disposed on the base (2), the foot pedal assembly (5) is connected to the counterweight assembly, the counterweight assembly is disposed on the base (2); A blocking mechanism (14) is disposed at the left end of the base (2) and located at the left end of the foot pedal assembly (5). The blocking mechanism (14) includes: a mounting box (141), a baffle (142), a first resistance assembly, and a pair of second resistance assemblies. The mounting box (141) is mounted on the base (2). The baffle (142) is slidably disposed on the mounting box (141) and abuts against the first resistance assembly and the pair of second resistance assemblies. The foot pedal assembly (5) can abut against the baffle (142), causing the baffle (142) to drive the first resistance assembly and the pair of second resistance assemblies to move.

2. The lower limb training device according to claim 1, characterized in that, The adjustment component (4) includes: Rotating rod (42), which is rotatably mounted on the base (21) of the base (2); A screw (45) is rotatably disposed within the base (21), and the screw (45) is connected to the rotating rod (42) via a transmission assembly; A movable seat (47) is threadedly connected to the screw (45), and the movable seat (47) is slidably connected inside the seat body (21); Mounting base (48) is connected between the movable seat (47) and the seat plate (31) of the seat assembly (3).

3. The lower limb training device according to claim 2, characterized in that, The adjustment component (4) also includes a locking component. A turntable (41) is provided at the front end of the rotating rod (42). The locking component can be connected between the turntable (41) and the seat (21) to lock the rotating rod (42).

4. The lower limb training device according to claim 3, characterized in that, The locking assembly includes a pin (49) that can pass through a hole (411) on the turntable (41) and be inserted into a slot (212) in the base (21).

5. The lower limb training device according to claim 1, characterized in that, The first resistance component includes: A slide (147) is slidably engaged with a housing (143) disposed in the mounting box (141). A first roller (1422) is provided on the inner side of the baffle (142), and the first roller (1422) abuts against the slide (147). A first compression spring (148) is connected between the slide (147) and the mounting box (141).

6. The lower limb training device according to claim 5, characterized in that, The second resistance component includes: A slider (144) is slidably disposed inside the housing (143), and the first roller (1422) of the baffle (142) abuts against the slider (144); A connecting rod (1441) extends into the housing (143) and is connected to the slider (144); The second compression spring (1442) is sleeved on the inner end of the connecting rod (1441) and abuts against the slider (144) and the housing (143); A swing block (145) is pivotally connected inside the mounting box (141), and the outer end of the connecting rod (1441) abuts against the swing block (145); A push rod (1452) is slidably engaged with the mounting box (141) and abuts against the swing block (145); A third compression spring (1455) abuts against the top rod (1452) and the mounting box (141); A tension spring (1451) is connected between the mounting box (141) and the swing block (145).

7. The lower limb training device according to claim 1, characterized in that, The foot pedal assembly (5) includes: Mounting plate (51); A pair of foot pedals (52) are disposed opposite to each other on the mounting plate (51); A pair of elastic bands (53) are connected to the corresponding foot pedals (52).

8. The lower limb training device according to claim 7, characterized in that, The footrest (52) includes a base plate (522) and a pair of side plates (521). The base plate (522) is disposed on the mounting plate (51), and the pair of side plates (521) are symmetrically disposed on the base plate (522). The elastic band (53) is connected between the pair of side plates (521).

9. The lower limb training device according to claim 7, characterized in that, The bottom of the mounting plate (51) is provided with a support rod (54), and the lower end of the support rod (54) is connected to a movable block (7). The movable block (7) can slide on the slide rail (6) on the base (2) and can abut against the baffle (142).

10. The lower limb training device according to claim 9, characterized in that, The counterweight assembly includes: A container (9) is provided, which is capable of holding a counterweight (10). A pull rope (8) connects the container (9) to the movable block (7); A guide wheel (12) is mounted on the seat (21) of the base (2), and the pull rope (8) passes around the guide wheel (12).

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