Portable fitness scooter for lower limb rehabilitation

Abstract

The utility model discloses a portable fitness scooter for lower limb rehabilitation, and belongs to the technical field of fitness equipment, the portable fitness scooter comprises a front fork frame and a pedal, the pedal is provided with an adjusting mechanism, the adjusting mechanism comprises a balancing weight and multiple sets of positioning pieces, the pedal is provided with a mounting groove, and the balancing weight is located in the mounting groove; the balancing weight can be fixed to the balancing weight through the multiple sets of positioning pieces, and the two ends of the balancing weight are both fixedly connected with connecting blocks. The positioning piece comprises a positioning block and a positioning spring, a moving groove is formed in the inner wall of the mounting groove, the positioning block is in sliding connection with the inner wall of the moving groove, a positioning groove is formed in the connecting block, the positioning block is matched with the positioning groove in an inserted mode, one end of the positioning spring is fixedly connected to the positioning block, and the other end of the positioning spring is fixedly connected to the inner wall of the moving groove. The fitness effect of the portable fitness scooter for lower limb rehabilitation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of fitness equipment, and in particular to a portable fitness scooter for lower limb rehabilitation. Background Art

[0002] At present, scooters are a new product form of skateboarding after traditional skateboards.

[0003] Related technology can refer to the Chinese utility model patent with authorization announcement number CN2405620Y, which discloses a fitness scooter suitable for fitness and games, including a front fork frame device including a front walking wheel and a handlebar, a pedal, a rear walking wheel device fixedly connected to the pedal, and a folding locking device, and the front fork frame device is connected to the pedal through the folding locking device. The folding locking device is composed of a fan-shaped plate pair composed of two left and right fan-shaped plates, a fixed shaft, a locking shaft, an adjusting shaft, a lifting buckle, a reset spring and a diagonal support frame, etc., on the fan-shaped plates on the left and right sides of the fan-shaped plate pair fixed on the pedal, there are respectively provided with fan-shaped holes of equal diameter and symmetry, and at the two ends of the fan-shaped holes, there are respectively provided with long through holes along the radial direction, the locking shaft is arranged in the fan-shaped holes on the fan-shaped plates on the left and right sides and is in a dynamic fit, and at one end of the locking shaft An adjusting nut is provided on the outer side of the fan-shaped plate, and an eccentric locking wrench with a "+"-shaped shaft structure is provided at the other end of the locking shaft and on the outer side of the fan-shaped plate. The lifting buckle is mounted on the adjusting shaft with a key, and the hook part of the lifting buckle is configured to embrace the locking shaft. The fixed shaft is arranged in an axial hole provided in the fan-shaped pair, one end of the return spring is buckled on the fixed shaft, and the other end thereof is buckled on the locking shaft. The adjusting shaft is arranged in an axial hole of a diagonal support frame used to connect the front fork frame and the locking device and is movably matched. An adjusting wrench with a key match is provided at one end of the adjusting shaft and on the outer side of the diagonal support frame, and a torsion spring is provided between the adjusting wrench and the diagonal support frame. One end of the diagonal support frame is fixedly connected to the vertical pipe of the front fork frame device, and the other end thereof is movably connected to the folding locking device through the fixed shaft.

[0004] With regard to the above-mentioned related technologies, there are the following defects: in the process of using the fitness scooter, the force consumed is fixed, so the fitness effect is not very obvious. Utility Model Content

[0005] In order to improve the fitness effect of a portable fitness scooter for lower limb rehabilitation, the present application provides a portable fitness scooter for lower limb rehabilitation.

[0006] The portable lower limb rehabilitation fitness scooter provided in the present application adopts the following technical solution:

[0007] A portable lower limb rehabilitation fitness scooter, comprising a front fork frame and a pedal, the pedal is provided with an adjustment mechanism, the adjustment mechanism comprises a counterweight block and a plurality of positioning members, a mounting groove is provided on the pedal, the counterweight block is located in the mounting groove, the counterweight block can be fixed on the counterweight block by using the plurality of positioning members, and both ends of the counterweight block are fixedly connected with connecting blocks;

[0008] The positioning member includes a positioning block and a positioning spring. A movable groove is provided on the inner wall of the mounting groove. The positioning block is slidably connected to the inner wall of the movable groove. A positioning groove is provided on the connecting block. The positioning block is plugged into the positioning groove. One end of the positioning spring is fixedly connected to the positioning block, and the other end of the positioning spring is fixedly connected to the inner wall of the movable groove.

[0009] By adopting the above technical scheme, in order to improve the fitness effect of the portable lower limb rehabilitation fitness scooter, during the process of lower limb rehabilitation, the user selects a counterweight block of appropriate weight according to the user's lower limb strength, moves the counterweight block, inserts the counterweight block and the connecting block into the installation groove, and then the positioning spring pushes the positioning block to move to the side close to the connecting block so that the positioning block can be inserted into the positioning groove, thereby fixing the connecting block and the counterweight block on the pedal, thereby changing the weight of the pedal. When the user uses it, it takes more effort to pedal the portable lower limb rehabilitation fitness scooter. During use, the user's lower limb strength can be exercised, and heavier counterweight blocks can be replaced according to the user's lower limb strength, so as to achieve the purpose of enhancing lower limb strength exercise and facilitate lower limb rehabilitation of the user.

[0010] Preferably, a shift rod is fixedly connected to the positioning block, and one end of the shift rod is located outside the movable groove.

[0011] By adopting the above technical solution, when the positioning block needs to be moved, the lever is pushed, and the movement of the lever drives the positioning block to move, so that the positioning block is disengaged from the positioning groove, thereby facilitating the release of the limit of the connecting block and the counterweight block.

[0012] Preferably, a clamping assembly is provided on the lever, and the clamping assembly includes a clamping block, a tough sheet and a protrusion. The clamping block is fixedly connected to the lever, the tough sheet is fixedly connected to the inner wall of the movable groove, and the tough sheet can be deformed. The protrusion is fixedly connected to the tough sheet, and the protrusion is provided with an inclined surface. The inclined surface on the protrusion is inclined downward from an end away from the clamping block to an end close to the clamping block. The clamping block is provided with a connecting groove, and the protrusion is plugged into the connecting groove.

[0013] By adopting the above technical solution, since there are multiple groups of positioning parts, in order to facilitate the disassembly of the counterweight block, when disassembling the counterweight block, pull the lever to move the lever to the side close to the tough piece, and the movement of the lever drives the clamping block to move. When the clamping block contacts the protrusion, since the protrusion is provided with a slope and the tough piece can be deformed, the tough piece is deformed, and the lever is continued to be moved. When the protrusion is aligned with the connecting groove, the tough piece restores its deformation, so that the protrusion is inserted into the connecting groove, thereby reducing the possibility of movement of the lever and the positioning block, and then facilitating the release of the limit of the connecting block by the remaining positioning parts, and finally facilitating the release of the limit of the counterweight block.

[0014] Preferably, a protective cover is threadedly connected to the pedal, and the protective cover is used to shield the lever.

[0015] By adopting the above technical solution, after the counterweight block is replaced, the protective cover is threadedly connected to the pedal, thereby reducing the possibility of the lever being accidentally touched.

[0016] Preferably, the front fork frame is provided with a connecting mechanism, the connecting mechanism comprises a connecting piece 1, a connecting piece 2 and an insert block, the insert block is mounted on the pedal, the connecting piece 1 and the connecting piece 2 are both fixedly connected to the front fork frame, and the insert block is located between the connecting piece 1 and the connecting piece 2;

[0017] The connection mechanism also includes a limiting component for fixing the insertion block.

[0018] By adopting the above technical solution, in order to facilitate the carrying or logistics transportation of the portable lower limb rehabilitation fitness scooter, the limit of the insertion block by the limit component is released, and the movable pedal is separated from the front fork frame, thereby facilitating the carrying of the portable lower limb rehabilitation fitness scooter.

[0019] Preferably, the limit assembly comprises an insertion rod, a card, a push block and a push rod, the connecting piece 1 is provided with a through slot 1, the insert block is provided with a through slot 2, the connecting piece 2 is provided with a through slot 3, the insertion rod passes through the through slot 1 and the through slot 2 in sequence, and one end of the insertion rod is located in the through slot 3, the insertion rod is slidably connected to the inner wall of the through slot 1, the inner wall of the through slot 2 and the inner wall of the through slot 3;

[0020] The insertion rod is provided with a placement slot, one end of the card is fixedly connected to the inner wall of the placement slot, the inner wall of the through slot 1 is provided with a connecting slot, a connecting hole and a connecting slot, the other end of the card is in contact with the inner wall of the connecting slot, and the card can be deformed;

[0021] The pushing block is slidably connected to the inner wall of the abutting groove, and the pushing block can contact the card;

[0022] The push rod is fixedly connected to the push block, and the push rod passes through the connecting hole, and one end of the push rod is located in the connecting groove;

[0023] The connecting mechanism further comprises a pushing component for pushing the insertion rod to move.

[0024] By adopting the above technical solution, when removing the insertion rod, the push rod is pressed, and the movement of the push rod drives the push block to move. When the push block contacts the card, the card is pushed to move, and the card and the insertion rod are moved. The push rod is continued to be pressed to move the card into the placement slot. Then the pushing assembly pushes the insertion rod to move, so that one end of the insertion rod is located outside the slot to facilitate pulling out the insertion rod, thereby releasing the limit on the insertion block.

[0025] Preferably, the pushing assembly includes a moving block and a pushing spring, the moving block is slidably connected to the inner wall of the through slot three, the moving block is in contact with the insertion rod, one end of the pushing spring is fixedly connected to the moving block, and the other end of the pushing spring is fixedly connected to the inner wall of the through slot three.

[0026] By adopting the above technical solution, after the card is deformed into the placement slot, the push spring pushes the moving block to move, and the movement of the moving block drives the insertion rod to move, so that one end of the insertion rod is located outside the slot.

[0027] Preferably, the positioning block is provided with an inclined surface, and the inclined surface on the positioning block is arranged to be inclined downward from an end close to the counterweight block to an end away from the counterweight block.

[0028] By adopting the above technical solution, when the connecting block contacts the positioning block, the inclined surface provided on the positioning block pushes the positioning block to move to the side away from the connecting block, so that the positioning block moves into the moving groove, thereby facilitating the movement of the counterweight block into the installation groove.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. In order to improve the fitness effect of the portable lower limb rehabilitation fitness scooter, during the process of lower limb rehabilitation, the user selects a weight block of appropriate weight according to the user's lower limb strength, moves the weight block, inserts the weight block and the connecting block into the installation slot, and then the positioning spring pushes the positioning block to move to the side close to the connecting block, so that the positioning block can be inserted into the positioning slot, so that the connecting block and the weight block are fixed on the pedal, thereby changing the weight of the pedal. When the user uses it, it takes more effort to pedal the portable lower limb rehabilitation fitness scooter. During use, the user's lower limb strength can be exercised, and heavier weight blocks can be replaced according to the user's lower limb strength, so as to achieve the purpose of strengthening the lower limb strength exercise and facilitate the user's lower limb rehabilitation;

[0031] 2. In order to facilitate the carrying or logistics transportation of the portable lower limb rehabilitation fitness scooter, the limit of the insertion block by the limit assembly is released, and the moving pedal is separated from the front fork frame, thereby facilitating the carrying of the portable lower limb rehabilitation fitness scooter. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0033] Figure 2 It is a structural schematic diagram of the present application highlighting the regulating mechanism.

[0034] Figure 3 It is a structural schematic diagram of the present application highlighting the positioning member and the clamping member.

[0035] Figure 4 It is a structural schematic diagram of the present application highlighting the connection mechanism.

[0036] Reference numerals: 1, front fork frame; 2, pedal; 21, mounting slot; 22, moving slot; 3, adjusting mechanism; 31, counterweight block; 32, connecting block; 321, positioning slot; 33, positioning member; 34, positioning block; 35, positioning spring; 36, lever; 37, protective cover; 4, clamping assembly; 41, clamping block; 411, connecting slot; 42, toughness sheet; 43, protrusion; 5, connecting mechanism; 51, connecting sheet 1; 5 11. Through slot one; 512. Abutment slot; 513. Connecting hole; 514. Connecting slot; 52. Connecting plate two; 521. Through slot three; 53. Insertion block; 531. Through slot two; 54. Fan-shaped plate pair; 55. Diagonal support; 6. Limiting assembly; 61. Insertion rod; 611. Placement slot; 62. Card; 63. Push block; 64. Push rod; 65. Push assembly; 66. Moving block; 67. Push spring. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-4 This application is described in further detail.

[0038] The present application embodiment discloses a portable lower limb rehabilitation fitness scooter. Figure 1 A portable lower limb rehabilitation fitness scooter comprises a front fork frame 1 and a pedal 2, the pedal 2 is provided with an adjustment mechanism 3, the adjustment mechanism 3 is used to change the weight of the pedal 2 itself, and the front fork frame 1 is provided with a connecting mechanism 5 for connecting and fixing the pedal 2.

[0039] Reference Figure 2 and Figure 3 The adjustment mechanism 3 includes a counterweight block 31, two sets of positioning members 33 and a clamping assembly 4. A mounting groove 21 is provided at the bottom of the pedal 2. The counterweight block 31 is located in the mounting groove 21. Both ends of the counterweight block 31 are fixedly connected with connecting blocks 32. The positioning members 33 can be set as one or more groups. The positioning members 33 include positioning blocks 34 and positioning springs 35. A moving groove 22 is provided on the inner side wall of the mounting groove 21. The positioning block 34 slides on the inner side wall of the moving groove 22. A positioning groove 321 is provided on the connecting block 32. The positioning block 34 is plugged into the positioning groove 321. An inclined surface is provided on the positioning block 34. The inclined surface on the positioning block 34 The surface is inclined downward from one end close to the counterweight block 31 to the end away from the counterweight block 31. One end of the positioning spring 35 is fixedly connected to the positioning block 34, and the other end of the positioning spring 35 is fixedly connected to the inner wall of the movable groove 22. A lever 36 is fixedly connected to the positioning block 34, and one end of the lever 36 is located outside the movable groove 22. Moving the lever 36 can drive the positioning block 34 to move, thereby facilitating the pulling of the positioning block 34 to move. A protective cover 37 is threadedly connected to the bottom of the pedal 2. The protective cover 37 reduces the possibility of the lever 36 being accidentally touched during use, thereby improving the stability of the fixed counterweight block 31.

[0040] The clamping assembly 4 includes a clamping block 41, a tough sheet 42 and a protrusion 43. The clamping block 41 is fixedly connected to the lever 36, the tough sheet 42 is fixedly connected to the inner wall of the movable groove 22, the tough sheet 42 can be made of spring steel, the protrusion 43 is fixedly connected to the tough sheet 42, and a slope is provided on the protrusion 43. The slope on the protrusion 43 is inclined downward from the end away from the clamping block 41 to the end close to the clamping block 41. A connecting groove 411 is provided on the clamping block 41, and the protrusion 43 is plugged into the connecting groove 411.

[0041] In order to improve the fitness effect of the portable lower limb rehabilitation fitness pedal 2, during the user's lower limb rehabilitation, the user selects a counterweight block 31 of appropriate weight according to the user's lower limb strength, and inserts the selected counterweight block 31 into the mounting groove 21. When the connecting block 32 contacts the positioning block 34, since the positioning block 34 is provided with an inclined surface, the positioning block 34 is pushed to move to the side away from the connecting block 32, so that the counterweight block 31 can be inserted into the mounting groove 21, so that the weight of the pedal 2 is increased, and then the weight of the portable lower limb rehabilitation fitness pedal 2 is increased. When the user uses it, the user needs to increase the strength of pushing the ground to make the portable lower limb rehabilitation fitness pedal 2 move. Therefore, the user's lower limb strength can be well exercised, and the counterweight blocks 31 of different weights can be replaced according to the rehabilitation condition of the user's lower limbs, so as to achieve the purpose of enhancing the lower limb strength exercise and facilitate the lower limb rehabilitation of the user.

[0042] Reference Figure 4 The connecting mechanism 5 includes a connecting piece 1 51, a connecting piece 2 52, an insert block 53, a limit assembly 6 and a pushing assembly 65. A fan-shaped plate pair 54 is fixedly connected to the pedal 2, and a diagonal support frame 55 is installed on the fan-shaped plate pair 54. The insert block 53 is fixedly connected to the diagonal support frame 55. The connecting piece 1 51 and the connecting piece 2 52 are both fixedly connected to the front fork frame 1, and the insert block 53 is located between the connecting piece 1 51 and the connecting piece 2 52.

[0043] The limiting assembly 6 includes an insertion rod 61, a card 62, a push block 63 and a push rod 64. The connecting piece 1 51 is provided with a through groove 1 511, the insertion block 53 is provided with a through groove 2 531, and the connecting piece 2 52 is provided with a through groove 3 521. The insertion rod 61 passes through the through groove 1 511 and the through groove 2 531 in sequence, and one end of the insertion rod 61 is located in the through groove 3 521. The insertion rod 61 is in a rectangular parallelepiped shape. The insertion rod 61 is attached to the inner side wall of the through groove 1 511, the inner side wall of the through groove 2 531 and the inner side wall of the through groove 3 521 for sliding. The insertion rod 61 is provided with a placement groove 611, and one end of the card 62 is fixed. Connected to the inner wall of the placement groove 611, a connected abutment groove 512, a connecting hole 513 and a connecting groove 514 are opened on the inner wall of the groove 511, and the other end of the card 62 abuts on the inner wall of the abutment groove 512. The card 62 can be made of spring steel. The push block 63 slides on the inner wall of the abutment groove 512, and the push block 63 can contact the card 62. The push rod 64 is fixedly connected to the push block 63, and the push rod 64 passes through the connecting hole 513. One end of the push rod 64 is located in the connecting groove 514. Since the push rod 64 is located in the connecting groove 514, the possibility of the push rod 64 being accidentally touched is reduced.

[0044] Reference Figure 4The pushing assembly 65 includes a moving block 66 and a pushing spring 67. The moving block 66 slides against the inner wall of the through slot three 521. The moving block 66 contacts the insertion rod 61. One end of the pushing spring 67 is fixedly connected to the moving block 66, and the other end of the pushing spring 67 is fixedly connected to the inner wall of the through slot three 521.

[0045] In order to facilitate the carrying or logistics transportation of the portable lower limb rehabilitation fitness pedal 2, first press the push rod 64, the push rod 64 moves to drive the push block 63 to move, when the push block 63 contacts the card 62, the card 62 and the insertion rod 61 are pushed to move, so that the insertion rod 61 pushes the moving block 66, squeezes the push spring 67, after the card 62 is deformed into the placement groove 611, the push spring 67 pushes the moving block 66 to move, the moving block 66 moves and drives the insertion rod 61 to move, so that one end of the insertion rod 61 is located outside the through groove 511, so that the user can pull out the insertion rod 61, and then move the pedal 2 so that the pedal 2 is separated from the front fork frame 1, so as to facilitate the disassembly of the portable lower limb rehabilitation fitness pedal 2 into multiple parts, and then facilitate the carrying or logistics transportation of the portable lower limb rehabilitation fitness pedal 2.

[0046] The implementation principle of a portable lower limb rehabilitation fitness pedal vehicle in an embodiment of the present application is: using an adjustment mechanism 3 to adjust the weight of the portable lower limb rehabilitation fitness pedal vehicle 2, so as to adjust the force required for the user's lower limbs to push off the ground during use, thereby allowing the user's lower limbs to be exercised, and the portable lower limb rehabilitation fitness pedal vehicle 2 can be separated into a front fork frame 1 part and a pedal 2 part by using a connecting mechanism 5, so as to facilitate carrying or transporting the portable lower limb rehabilitation fitness pedal vehicle 2.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A portable lower limb rehabilitation fitness scooter, comprising a front fork frame (1) and a pedal (2), Features: The pedal (2) is provided with an adjustment mechanism (3), the adjustment mechanism (3) comprising a counterweight (31) and a plurality of positioning members (33); a mounting groove (21) is provided on the pedal (2), the counterweight (31) is located in the mounting groove (21), the counterweight (31) can be fixed to the counterweight (31) by using the plurality of positioning members (33), and both ends of the counterweight (31) are fixedly connected with connection blocks (32); The positioning member (33) comprises a positioning block (34) and a positioning spring (35); a movable groove (22) is provided on the inner wall of the mounting groove (21); the positioning block (34) is slidably connected to the inner wall of the movable groove (22); a positioning groove (321) is provided on the connecting block (32); the positioning block (34) is plugged into and matched with the positioning groove (321); one end of the positioning spring (35) is fixedly connected to the positioning block (34); and the other end of the positioning spring (35) is fixedly connected to the inner wall of the movable groove (22).

2. A portable lower limb rehabilitation fitness scooter according to claim 1, Features: A shifting rod (36) is fixedly connected to the positioning block (34), and one end of the shifting rod (36) is located outside the moving groove (22).

3. A portable lower limb rehabilitation fitness scooter according to claim 2, Features: The lever (36) is provided with a clamping assembly (4), and the clamping assembly (4) comprises a clamping block (41), a tough sheet (42) and a protrusion (43); the clamping block (41) is fixedly connected to the lever (36); the tough sheet (42) is fixedly connected to the inner wall of the movable groove (22), and the tough sheet (42) is deformable; the protrusion (43) is fixedly connected to the tough sheet (42); an inclined surface is provided on the protrusion (43); the inclined surface on the protrusion (43) is inclined downwardly arranged from an end away from the clamping block (41) to an end close to the clamping block (41); a connecting groove (411) is provided on the clamping block (41), and the protrusion (43) is plugged into and matched with the connecting groove (411).

4. A portable lower limb rehabilitation fitness scooter according to claim 2, Features: A protective cover (37) is threadedly connected to the pedal (2), and the protective cover (37) is used to shield the shifting rod (36).

5. A portable lower limb rehabilitation fitness scooter according to claim 1, Features: The front fork frame (1) is provided with a connecting mechanism (5), the connecting mechanism (5) comprising a connecting piece 1 (51), a connecting piece 2 (52) and an inserting block (53), the inserting block (53) being mounted on the pedal (2), the connecting piece 1 (51) and the connecting piece 2 (52) being both fixedly connected to the front fork frame (1), and the inserting block (53) being located between the connecting piece 1 (51) and the connecting piece 2 (52); The connecting mechanism (5) also includes a limiting component (6) for fixing the insertion block (53).

6. A portable lower limb rehabilitation exercise scooter according to claim 5, Features: The limiting assembly (6) comprises an insertion rod (61), a card (62), a pushing block (63) and a pushing rod (64); the connecting piece (51) is provided with a first through groove (511); the insertion block (53) is provided with a second through groove (531); the connecting piece (52) is provided with a third through groove (521); the insertion rod (61) sequentially passes through the first through groove (511) and the second through groove (531); one end of the insertion rod (61) is located in the third through groove (521); the insertion rod (61) is slidably connected to the inner wall of the first through groove (511), the inner wall of the second through groove (531) and the inner wall of the third through groove (521); The insertion rod (61) is provided with a placement groove (611), one end of the card (62) is fixedly connected to the inner wall of the placement groove (611), the inner wall of the through groove (511) is provided with a connecting groove (512), a connecting hole (513) and a connecting groove (514) which are connected to each other, the other end of the card (62) is in contact with the inner wall of the connecting groove (512), and the card (62) can be deformed; The pushing block (63) is slidably connected to the inner wall of the abutting groove (512), and the pushing block (63) can contact the card (62); The pushing rod (64) is fixedly connected to the pushing block (63), and the pushing rod (64) passes through the connecting hole (513), and one end of the pushing rod (64) is located in the connecting groove (514); The connecting mechanism (5) further comprises a pushing assembly (65) for pushing the insertion rod (61) to move.

7. A portable lower limb rehabilitation exercise scooter according to claim 6, Features: The pushing assembly (65) includes a moving block (66) and a pushing spring (67), wherein the moving block (66) is slidably connected to the inner wall of the through slot three (521), the moving block (66) is in contact with the insertion rod (61), one end of the pushing spring (67) is fixedly connected to the moving block (66), and the other end of the pushing spring (67) is fixedly connected to the inner wall of the through slot three (521).

8. A portable lower limb rehabilitation exercise scooter according to claim 1, Features: The positioning block (34) is provided with an inclined surface, and the inclined surface on the positioning block (34) is arranged to be inclined downward from an end close to the counterweight block (31) to an end away from the counterweight block (31).

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