CN216497245U - Comprehensive stretching heightening trainer - Google Patents

Abstract

The utility model relates to a stretching comprehensive heightening trainer which comprises a base, a left side frame, a right side frame, a front vertical frame, an upper top frame and a dumbbell frame, wherein the base, the left side frame, the right side frame, the front vertical frame, the upper top frame and the dumbbell frame are detachably connected with one another; the upper top frame is fixedly connected with the left side frame and the right side frame, and a pull handle is arranged on the upper top frame; the front vertical frame is provided with a first handle, a second handle and a base plate; the rear part of the upper top frame is fixedly connected with the front parts of the left side frame and the right side frame; the left side frame and the right side frame are both provided with massage wheel brackets, and the massage wheel brackets are provided with massage wheels; the back part of the base is provided with a sit-up foot-hooking handle. The technical scheme has the advantages of simple structure, easy disassembly and assembly, convenient movement and good stability, and can complete more than thirty exercises for limb exercises by taking the equipment frame body as a support.

Description

Comprehensive stretching heightening trainer

Technical Field

The utility model relates to the technical field of sports equipment, in particular to a stretching comprehensive heightening trainer.

Background

With the improvement of the social living standard, the body building activities become daily demands of people, and besides outdoor fitness equipment which is visible everywhere, various indoor fitness equipment also largely enters families and various fitness venues. These indoor fitness equipments have different shapes and different functions, some pay attention to the function of exercising certain parts of the body, some pay attention to the muscle group exercising certain parts of the body, and some exercise the muscle group, which are all the same, in short, are diversified. However, because of the diversity of the various parts and muscle groups of the body and their combinations, the current exercise machines still do not meet the expectations in terms of the diversity of functions, and therefore, there is a need for more products with combined functions to meet the market demands.

Disclosure of Invention

The utility model aims to solve the technical problem of making up the defects of the prior art and provides a comprehensive stretching heightening trainer which has multiple functions, simple structure, good stability and relatively small floor area.

To solve the technical problems, the technical scheme of the utility model is as follows:

a comprehensive stretching heightening trainer comprises a base, a left side frame, a right side frame, a front vertical frame, an upper top frame and 2N dumbbell frames, wherein N is 1 or 2;

the left side frame and the right side frame are oppositely arranged at a certain interval and are detachably fixed on the base, and grips are arranged on the left side frame and the right side frame;

the upper top frame is detachably and fixedly connected with the left side frame and the right side frame, and a pull-up handle is arranged on the upper top frame;

the front vertical frame comprises a 'the restriction' shaped upper rod, and the 'the restriction' shaped upper rod comprises a straight rod and a pair of inclined rods arranged on two sides of the straight rod; a pair of vertical rods is fixedly arranged at the front part of the 'sports' shaped upper rod, a lower rod is arranged below the rear part of the 'sports' shaped upper rod, and the vertical rods are fixedly connected with the lower rod through horizontal connecting rods; a first handle and a second handle are arranged between the inclined rod and the lower rod of the 'bottom' shaped upper rod; a backing plate support and a connecting bent pipe which are integrally connected and arranged in a V shape are fixedly arranged between the upper and lower square rods, the angle between the backing plate support and the ground is beta, the backing plate support is fixedly connected with the lower square rod, the connecting bent pipe is fixedly connected with a straight rod of the upper square rod, and a backing plate is fixedly arranged on the backing plate support; the rear part of the 'bottom' shaped upper rod is detachably and fixedly connected with the front parts of the left side frame and the right side frame, and the left end and the right end of the lower rod are respectively detachably and fixedly connected with the front parts of the left side frame and the right side frame;

the 2N dumbbell racks are divided into two groups, namely a left dumbbell rack group and a right dumbbell rack group, two ends of the dumbbell racks of the left dumbbell rack group are detachably and fixedly connected with the left side frame and the corresponding vertical rod respectively, and two ends of the dumbbell racks of the right dumbbell rack group are detachably and fixedly connected with the right side frame and the corresponding vertical rod respectively;

the left side frame and the right side frame are both provided with massage wheel brackets, and the massage wheel brackets are provided with massage wheels; the back part of the base is provided with a sit-up foot-hooking handle.

Furthermore, a slope plate is fixedly arranged on the backing plate.

Furthermore, a hook foot ring is arranged on the front vertical frame.

Furthermore, a pair of '7' -shaped handles which are symmetrically arranged left and right is arranged between the 'comfort' shaped upper rod of the upper top frame and the front vertical frame, each '7' -shaped handle comprises a cross rod and a longitudinal rod which are integrally connected, the hanging end of the longitudinal rod of each '7' -shaped handle is detachably and fixedly connected with the 'comfort' shaped upper rod, the hanging end of the cross rod of the '7' -shaped handle on the left side is detachably and fixedly connected with the left side frame, and the hanging end of the cross rod of the '7' -shaped handle on the right side is detachably and fixedly connected with the right side frame.

Furthermore, the cross rod of the 7-shaped grip is connected with the inclined rod of the 'knitting combining' shaped upper rod through a lower support rod, and the cross rod of the 7-shaped grip is connected with the upper top frame through an upper support rod.

Furthermore, a display bracket is fixedly arranged between the longitudinal rods of the pair of 7-shaped grips and used for fixing a display.

Furthermore, a hook is fixedly arranged at the front end of the display support.

Furthermore, the top surface of base is "︺" shape, and is equipped with environmental protection rubber slab on the top surface.

Further, sit up colludes foot handle and is "U" shape setting, and sit up colludes the both ends of foot handle and all fixes and be equipped with the stopper, and sit up colludes connection structure between foot handle and the base and does: the sit-up foot hook comprises a threaded column and a threaded fixing block, wherein the threaded column is fixedly connected with a base, the threaded fixing block is sleeved at the end part of a sit-up foot hook handle and is in clearance fit with the end part of the sit-up foot hook handle, and the internal thread of the threaded fixing block is matched and screwed with the external thread of the threaded column; the bottom of the internal thread hole of the thread fixing block is provided with a limiting table, and the limiting block is clamped between the limiting table on the thread fixing block and the end part of the thread column.

Furthermore, the bottom of a vertical rod of the front vertical frame is provided with a front caster, the base is provided with a pair of rear lifting caster sets, each rear lifting caster set comprises a wheel frame and a rear caster arranged on the wheel frame, the wheel frames are fixed on eccentric blocks, the eccentric blocks are provided with eccentric holes, the eccentric holes are fixedly connected with rotating shafts, the front parts and the rear parts of the rotating shafts are respectively in rotatable connection with bearings, the bearings are fixed on the U-shaped frame, the rear ends of the rotating shafts are connected with caster lifting handles, the eccentric blocks are driven to rotate by rotating the caster lifting handles, and then the rear casters are driven to ascend or descend; a positioning disc is fixedly arranged on the rotating shaft, a through hole is formed in the positioning disc, and a first positioning hole and a second positioning hole are formed in the U-shaped frame; when the fixing screws sequentially penetrate through the through holes and the first positioning holes in the positioning plate, the rear caster is kept in the highest position state, and when the fixing screws sequentially penetrate through the through holes and the second positioning holes in the positioning plate, the rear caster is kept in the lowest position state.

The utility model can achieve the following beneficial effects: simple structure, easy operation of dismouting, it is convenient to remove, and stability is good to the equipment support body is for relying on, can accomplish thirty multinomial movements that the limbs were taken exercise.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a front view of an embodiment of the present invention;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is a top view of FIG. 2;

FIG. 6 is a bottom view of FIG. 2;

FIG. 7 is an exploded view of an embodiment of the present invention;

FIG. 8 is a sectional view of a connection structure between the sit-up hitching foot handle and the base in the embodiment of the utility model;

FIG. 9 is a perspective view of a rear lift caster assembly in an embodiment of the present invention;

FIG. 10 is a front view of a rear lift caster assembly in an embodiment of the present invention;

FIG. 11 is a top view of FIG. 10;

FIG. 12 is a left side view of FIG. 10;

FIG. 13 is a sectional view A-A of FIG. 11;

FIG. 14 is a perspective view of a front stand in an embodiment of the present invention;

FIG. 15 is a side view of a front stand in an embodiment of the present invention;

in the figure: 1-rear caster, 2-base, 3-sit-up hitching foot handle, 4-slope board, 5-right side frame, 6-massage wheel bracket, 7-massage wheel, 8-display bracket, 801-hook, 9-display, 10-upper top frame, 11-chin handle, 12-left side frame, 1201-grip, 13-front stand, 1301- "" shaped upper rod, 1302-vertical rod, 1303-first handle, 1304-second handle, 1305-lower rod, 1306-horizontal connecting rod, 1307-pad, 1308-pad bracket, 1309-connecting pipe, 1310-hook foot ring, 14-dumbbell rack, 15-environmental protection rubber plate, 16-front caster, 17-caster lifting handle, 18-dumbbell, 19-upper stay bar, 20-L-shaped handle, 21-lower stay bar, 22-threaded column, 23-limiting block, 24-threaded fixing block, 25-bearing, 26-positioning screw, 27-U-shaped frame, 2701-first positioning hole, 2702-second positioning hole, 28-wheel frame, 29-eccentric block, 30-rotating shaft, 31-positioning disc and 32-fixing screw.

Detailed Description

The utility model is described in further detail below with reference to the drawings and the detailed description.

Examples

A comprehensive stretching heightening trainer comprises a base 2, a left side frame 12, a right side frame 5, a front vertical frame 13, an upper top frame 10 and 4 dumbbell racks 14.

The base 2 is a training bearing body and is also a platform for the body builder to exercise, and the body building actions of more than thirty limbs are completed on the platform. Base 2 is steel sheet steel pipe seam piece, is "︺" shape with base 2's top surface design in order to satisfy different users ' motion demand, and the slope of both sides is formed with timber processing, compares and to guarantee better human travelling comfort in the metal, bonds on the top surface of seat 2 has environmental protection rubber slab 15, and is soft comfortable, has greatly promoted user's comfort in use.

The left side frame 12 and the right side frame 5 are oppositely arranged at a certain interval and are detachably fixed on the base 2 through screws, and the left side frame 12 and the right side frame 5 are respectively provided with a handle 1201.

The upper top frame 10 is detachably and fixedly connected with the left side frame 12 and the right side frame 5 through screws, a pull-up handle 11 is welded on the upper top frame 10, and arm stretching movement can be carried out by grabbing the pull-up handle 11 by hands.

The front vertical frame 13 comprises a 'the knitting combining' shaped upper rod 1301, and the 'the knitting combining' shaped upper rod 1301 comprises a straight rod and a pair of inclined rods arranged on two sides of the straight rod; a pair of vertical rods 1302 are welded at the front part of the 'bottom' shaped upper rod 1301, a lower rod 1305 is arranged below the 'bottom' shaped upper rod 1301, the vertical rods 1302 are fixedly connected with the lower rod 1305 through horizontal connecting rods 1306, and the horizontal connecting rods 1306 are in a welding relation; a first handle 1303 and a second handle 1304 are welded between the diagonal rod and the lower rod 1305 of the "key" shaped upper rod 1301; a cushion plate support 1308 and a connecting bent pipe 1309 which are integrally connected and arranged in a V shape are fixedly arranged between the 'bottom' shaped upper rod 1301 and the lower rod 1305, the angle between the cushion plate support 1308 and the ground is beta and beta =30 degrees, the cushion plate support 1308 is welded with the lower rod 1305, the connecting bent pipe 1309 is welded with a straight rod of the 'bottom' shaped upper rod 1301, a cushion plate 1307 is fixedly arranged on the cushion plate support 1308, and a slope plate 4 is fixedly arranged on the cushion plate 1307; the rear part of the 'bottom' shaped upper rod 1301 is detachably and fixedly connected with the front parts of the left side frame 12 and the right side frame 5 through screws, and the left end and the right end of the lower rod 1305 are respectively and fixedly connected with the front parts of the left side frame 12 and the right side frame 5 through screws; a pair of '7' -shaped handles 20 which are arranged in bilateral symmetry are arranged between the 'comfort' shaped upper rod 1301 of the upper top frame 10 and the front vertical frame 13, each '7' -shaped handle 20 comprises a cross rod and a longitudinal rod which are connected integrally, the overhanging ends of the longitudinal rods of the '7' -shaped handles 20 are detachably and fixedly connected with the 'comfort' shaped upper rod 1301 through screws, the overhanging ends of the cross rods of the '7' -shaped handles 20 on the left side are detachably and fixedly connected with the left side frame 12 through screws, and the overhanging ends of the cross rods of the '7' -shaped handles 20 on the right side are detachably and fixedly connected with the right side frame 5 through screws; the cross bar of the ' 7 ' -shaped grip 20 is connected with the inclined bar of the ' Chinese style upper bar 1301 through a lower stay 21, and the cross bar of the ' 7 ' -shaped grip 20 is connected with the upper top frame 10 through an upper stay 19; a hook foot ring 1310 is arranged on the front vertical frame 13; a display bracket 8 is fixedly arranged between the longitudinal rods of the pair of 7-shaped grips 20, and the display bracket 8 is used for fixing a display 9; the front end of the display support 8 is fixedly provided with a hook 801. The display screen 9 is a touch display screen, and 9 kinds of functional modules containing all fitness sports items on the display screen can come from the item to be fitness selected through the touch functional module, and after entering a selected sports function interface, the display screen can present the regular sports demonstration of the sports in a real person version or an animation version, and meanwhile, the voice function can play the sports attention items synchronously, so that the aim of guiding a user to achieve an ideal fitness effect is achieved.

The dumbbell racks 14 are used for accommodating dumbbells 18, and 4 dumbbell racks 14 are divided into two groups, wherein each group comprises 2 dumbbell racks 14 which are arranged up and down and are respectively a left dumbbell rack group and a right dumbbell rack group; two ends of the dumbbell rack 14 of the left dumbbell rack group are respectively fixedly connected with the left side rack 12 and the corresponding vertical rod 1302 in a detachable mode through screws and U-shaped sheaths, and two ends of the dumbbell rack 14 of the right dumbbell rack group are respectively fixedly connected with the right side rack 5 and the corresponding vertical rod 1302 in a detachable mode through screws and U-shaped sheaths.

The left side frame 12 and the right side frame 5 are both provided with massage wheel brackets 6, and the massage wheel brackets 6 are provided with massage wheels 7.

The back part of the base 2 is provided with a sit-up foot-hooking handle 3; the mat laid on the ground is laid on the back and the handle 3 is hooked by feet to carry out the rising and sitting movement. Sit up colludes foot handle 3 and is "U" shape setting, and sit up colludes the both ends of foot handle 3 and all fixes and be equipped with stopper 23, and sit up colludes the connection structure between foot handle 3 and the base 2 and does: the sit-up hook foot handle comprises a threaded column 22 and a threaded fixing block 24, wherein the threaded column 22 is fixedly connected with a base 2, the threaded fixing block 24 is sleeved on the end part of the sit-up hook foot handle 3 and is in clearance fit with the end part of the sit-up hook foot handle 3, and the internal thread of the threaded fixing block 24 is matched and screwed with the external thread of the threaded column 22; the bottom of the internal thread hole of the thread fixing block 24 is provided with a limiting table, and the limiting block 23 is clamped between the limiting table on the thread fixing block 24 and the end part of the thread column 22. When the sit-up needs not to be exercised, the threaded fixing block 24 can be unscrewed to separate the threaded fixing block from the threaded column 22, and the sit-up foot hooking handle 3 is taken down and placed below the display bracket 8, so that other forms of exercises are hindered.

In order to move the trainer, a front caster 16 is arranged at the bottom of a vertical rod 1302 of a front vertical frame 13, a pair of rear lifting caster sets are arranged on a base 2, each rear lifting caster set comprises a wheel frame 28 and a rear caster 1 arranged on the wheel frame 28, the wheel frame 28 is fixed on an eccentric block 29, an eccentric hole is formed in the eccentric block 29, the eccentric hole is fixedly connected with a rotating shaft 30 through a positioning screw 26, the front part and the rear part of the rotating shaft 30 are respectively and rotatably connected with a bearing 25, the bearing 25 is selected as a self-lubricating bearing in consideration of the fact that the trainer is not frequently used for replacing fields, the bearing 25 is fixed on a U-shaped frame 27, the rear end of the rotating shaft 30 is connected with a caster lifting handle 17, and the caster lifting handle 17 is rotated to drive the eccentric block 29 to rotate so as to drive the rear caster 1 to ascend or descend; a positioning disc 31 is fixedly arranged on the rotating shaft 30, a through hole is formed in the positioning disc 31, and a first positioning hole 2701 and a second positioning hole 2702 are formed in the U-shaped frame 27; when the fixing screw 32 passes through the through hole of the positioning plate 31 and the first positioning hole 2701 in sequence, the rear caster 1 is kept at the highest position, and when the fixing screw 32 passes through the through hole of the positioning plate 31 and the second positioning hole 2702 in sequence, the rear caster 1 is kept at the lowest position.

In this embodiment, left side frame 12, right side frame 5, preceding grudging post 13, go up roof-rack 10, dumbbell rack 14, grinding wheel support 6 and display support 8 form by the circular steel tube welding, and reuse screwed connection is fixed to become a whole, has guaranteed the outward appearance uniformity, like this, both can conveniently transport, dismantlement and equipment when can conveniently removing on a large scale again.

The left side frame 12, the right side frame 5, the front vertical frame 13 and the upper top frame 10 are not only support members of the equipment, but also functional members for realizing the functions of the equipment, and the frame bodies (and the slope plate 4) are used as supports, so that almost thirty kinds of body-building exercises can be performed on human body parts such as hands, arms, legs, feet, shoulders, waist and the like.

The advantages of this embodiment: simple structure, the dismouting is easily operated, and it is convenient to remove, and stability is good, has multiple functions such as back massage, dumbbell exercise, sit up, straight arm are tensile to simultaneously, for relying on to the equipment support body, can accomplish thirty more movements that the limbs were taken exercise, and these thirty more exercise movements all can show motion tutorial and notice through the display screen.

In the description of the present invention, words such as "inner", "outer", "upper", "lower", "front", "rear", etc., indicating orientations or positional relationships, are used for convenience in describing the present invention, and do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The above description is only one embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the spirit of the present invention.

Claims (10)

1. The utility model provides a tensile comprehensive heightening trainer, which is characterized in that: comprises a base (2), a left side frame (12), a right side frame (5), a front vertical frame (13), an upper top frame (10) and 2N dumbbell racks (14), wherein N is 1 or 2;

the left side frame (12) and the right side frame (5) are oppositely arranged at a certain interval and are detachably fixed on the base (2), and grips (1201) are arranged on the left side frame (12) and the right side frame (5);

the upper top frame (10) is detachably and fixedly connected with the left side frame (12) and the right side frame (5), and a pull handle (11) is arranged on the upper top frame (10);

the front vertical frame (13) comprises a 'knitting combining' shaped upper rod (1301), and the 'knitting combining' shaped upper rod (1301) comprises a straight rod and a pair of inclined rods arranged on two sides of the straight rod; a pair of vertical rods (1302) is fixedly arranged at the front part of the 'bottom' shaped upper rod (1301), a lower rod (1305) is arranged below the 'bottom' shaped upper rod (1301), and the vertical rods (1302) are fixedly connected with the lower rod (1305) through horizontal connecting rods (1306); a first handle (1303) and a second handle (1304) are arranged between the inclined rod and the lower rod (1305) of the 'bottom' shaped upper rod (1301); a cushion plate bracket (1308) and a connecting bent pipe (1309) which are integrally connected and arranged in a V shape are fixedly arranged between the upper and lower square rods (1301) and (1305), the angle between the cushion plate bracket (1308) and the ground is beta, the cushion plate bracket (1308) is fixedly connected with the lower square rod (1305), the connecting bent pipe (1309) is fixedly connected with the straight rod of the upper square rod (1301), and a cushion plate (1307) is fixedly arranged on the cushion plate bracket (1308); the rear part of the 'bottom' -shaped upper rod (1301) is detachably and fixedly connected with the front parts of the left side frame (12) and the right side frame (5), and the left end and the right end of the lower rod (1305) are respectively detachably and fixedly connected with the front parts of the left side frame (12) and the right side frame (5);

the 2N dumbbell racks (14) are divided into two groups, namely a left dumbbell rack group and a right dumbbell rack group, two ends of the dumbbell rack (14) of the left dumbbell rack group are respectively and fixedly connected with the left side frame (12) and the corresponding vertical rod (1302) in a detachable mode, and two ends of the dumbbell rack (14) of the right dumbbell rack group are respectively and fixedly connected with the right side frame (5) and the corresponding vertical rod (1302) in a detachable mode;

the left side frame (12) and the right side frame (5) are both provided with a massage wheel bracket (6), and the massage wheel bracket (6) is provided with a massage wheel (7); the back part of the base (2) is provided with a sit-up foot-hooking handle (3).

2. The stretch building trainer as claimed in claim 1, wherein: a slope plate (4) is fixedly arranged on the backing plate (1307).

3. The stretch building trainer as claimed in claim 1, wherein: the front vertical frame (13) is provided with a hook foot ring (1310).

4. The stretch building trainer as claimed in claim 1, wherein: the combination type combined input and output combined type combined operation device is characterized in that a pair of ' 7 ' -shaped grips (20) which are arranged in bilateral symmetry is arranged between the ' upper top frame (10) and the ' upper rod (1301) of the front vertical frame (13), each ' 7 ' -shaped grip (20) comprises a cross rod and a longitudinal rod which are integrally connected, the overhanging end of the longitudinal rod of each ' 7 ' -shaped grip (20) is detachably and fixedly connected with the ' upper rod (1301), the overhanging end of the cross rod of the ' 7 ' -shaped grip (20) on the left side is detachably and fixedly connected with the left side frame (12), and the overhanging end of the cross rod of the ' 7 ' -shaped grip (20) on the right side is detachably and fixedly connected with the right side frame (5).

5. The stretch building trainer as claimed in claim 4, wherein: the cross bar of the '7' -shaped grip (20) is connected with the inclined bar of the 'Chinese' shaped upper bar (1301) through a lower support bar (21), and the cross bar of the '7' -shaped grip (20) is connected with the upper top frame (10) through an upper support bar (19).

6. The stretch building trainer as claimed in claim 4, wherein: a display bracket (8) is fixedly arranged between the longitudinal rods of the pair of 7-shaped grips (20), and the display bracket (8) is used for fixing a display (9).

7. The stretch building trainer as claimed in claim 6, wherein: and a hook (801) is fixedly arranged at the front end of the display support (8).

8. The stretching combination heightening training device according to claim 1, wherein: the top surface of the base (2) is ︺ -shaped, and an environment-friendly rubber plate (15) is arranged on the top surface.

9. The stretch building trainer as claimed in claim 1, wherein: sit up colludes foot handle (3) and is "U" shape setting, and sit up colludes the both ends of foot handle (3) and all fixes and be equipped with stopper (23), and sit up colludes connection structure between foot handle (3) and base (2) and is: the sit-up foot hook comprises a threaded column (22) and a threaded fixing block (24), wherein the threaded column (22) is fixedly connected with a base (2), the threaded fixing block (24) is sleeved at the end part of a sit-up foot hook handle (3) and is in clearance fit with the end part of the sit-up foot hook handle (3), and the internal thread of the threaded fixing block (24) is matched and screwed with the external thread of the threaded column (22); the bottom of the internal thread hole of the thread fixing block (24) is provided with a limiting table, and the limiting block (23) is clamped between the limiting table on the thread fixing block (24) and the end part of the thread column (22).

10. The stretching combination heightening training device according to claim 1, wherein: the bottom of a vertical rod (1302) of the front vertical frame (13) is provided with a front caster (16), a base (2) is provided with a pair of rear lifting caster sets, each rear lifting caster set comprises a wheel carrier (28) and a rear caster (1) arranged on the wheel carrier (28), the wheel carrier (28) is fixed on an eccentric block (29), the eccentric block (29) is provided with an eccentric hole, the eccentric hole is fixedly connected with a rotating shaft (30), the front part and the rear part of the rotating shaft (30) are respectively and rotatably connected with a bearing (25), the bearing (25) is fixed on a U-shaped frame (27), the rear end of the rotating shaft (30) is connected with a caster lifting handle (17), the eccentric block (29) is driven to rotate by rotating the caster lifting handle (17), and then the rear caster (1) is driven to ascend or descend; a positioning disc (31) is fixedly arranged on the rotating shaft (30), a through hole is formed in the positioning disc (31), and a first positioning hole (2701) and a second positioning hole (2702) are formed in the U-shaped frame (27); when the fixing screws (32) sequentially pass through the through holes and the first positioning holes (2701) in the positioning plate (31), the rear caster (1) is kept at the highest position, and when the fixing screws (32) sequentially pass through the through holes and the second positioning holes (2702) in the positioning plate (31), the rear caster (1) is kept at the lowest position.

Images