CN107551450A - A kind of multifunctional body-building chair - Google Patents
A kind of multifunctional body-building chair Download PDFInfo
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- CN107551450A CN107551450A CN201710868969.4A CN201710868969A CN107551450A CN 107551450 A CN107551450 A CN 107551450A CN 201710868969 A CN201710868969 A CN 201710868969A CN 107551450 A CN107551450 A CN 107551450A
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Abstract
A kind of multifunctional body-building chair, ab lounge includes seat, and is located at the support frame of seat bottom, is provided with back rest in the seat top edge, the side of back rest two symmetrically respectively sets an arm-rest frame, and the back rest back side is provided with counterweight elastomeric element;The arm-rest frame includes the fixation arm-rest frame being connected with the back rest and/or seat, movable hand rail frame is flexibly connected with fixed arm-rest frame, symmetrically arranged two movable hand rails are connected by the first connecting rope, first connecting rope is provided with the first keeper, and the first keeper is connected with the first loading component by the first connector;First angle pulley is located in seat lower support frame;Counterweight elastomeric element upper end is connected to the upper end at the back rest back side, lower end and is connected by the first conduction rope with switching part, and second conduction rope one end is connected with switching part to be connected with the second fixture on seat frontal plane of projection.It is an advantage of the invention that small volume, easy to use.
Description
Technical field
The present invention relates to body-building equipment, in particular to a kind of multifunctional body-building chair.
Background technology
Chair is the conventional furniture of family, and present body-building equipment volume is larger, and it is extremely inconvenient at home to place, if
Multiple exercise members are integrated on common chair, you can to play the effect of body-building, the space of occupancy can also be reduced.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of multifunctional body-building chair, small volume, multiple exercise members
Integrate, it is easy to use, original bulky balance weight iron substituted for using elastomeric element, alleviate the deadweight of the present invention.
The present invention is in order to solve the above technical problems, used technical scheme is:A kind of multifunctional body-building chair, ab lounge bag
Seat is included, and is located at the support frame of the seat bottom, back rest, the side of back rest two are provided with the seat top edge
Symmetrical respectively to set an arm-rest frame, the back rest back side is provided with counterweight elastomeric element;
The arm-rest frame includes the fixation arm-rest frame being connected with the back rest and/or seat, movable hand rail frame and fixed handrail
Frame is flexibly connected, and face of the movable hand rail frame along parallel seat moves back and forth, symmetrically arranged two movable hand rail framves
Connected by the first connecting rope, the first connecting rope is provided with the first keeper, the first keeper and the first loading component by the
A connection piece is connected, and first power-assisted elastomeric element one end is connected with the first connector, the on the other end and seat frontal plane of projection
One fixture connects;
First angle pulley is located in the seat lower support frame;
The counterweight elastomeric element upper end is connected to the upper end at the back rest back side, lower end and connected by the first conduction rope with switching part
Connect, one end is connected the second conduction rope with switching part, the other end is just thrown by the first angle pulley, the first loading component and seat
The second fixture connection on shadow face.
Further, symmetrical on the support frame of the side of back rest two respectively to set a steering handle, steering handle is lived
Dynamic to be connected on support frame, steering handle edge moves back and forth perpendicular to the face of seat;
Symmetrically arranged two steering handles are connected by the second connecting rope, and the second connecting rope is provided with the second keeper,
Second keeper is connected with the first loading component by the second fitting, and second power-assisted elastomeric element one end connects with the second connector
Connect, the 3rd fixture connection on the other end and seat frontal plane of projection;
Second angle pulley is located in seat lower support frame;
The switching part includes top sheave, lower sheave, and top sheave is connected with lower sheave by the 3rd connector, the first conduction rope
It is connected with top sheave, lower sheave, the second angle pulley, the second loading component and seat frontal plane of projection are passed through in second conduction rope one end
On the 4th fixture connection.
Further, first fixed pulley is located among the upper end at the back rest back side, and the second fixed pulley is located at back rest
The side of back side upper end;
Described first conduction rope one end is connected with counterweight elastomeric element lower end, the other end passes through top sheave and the first fixed pulley, the
Two fixed pulleys are connected with being located at the regulation handle of one of fixed handrail;
The first conduction rope can be tightened up or loosened to the regulation handle.
Further, the seat lower surface is provided with hinge joint motion bar;
Second fixture is the 3rd angle pulley, and second conduction rope one end is connected by the 3rd angle pulley with motion bar.
Further, the top of the back rest is provided with hand handle;
4th fixture is the 4th angle pulley;
Socket rope one end be connected with hand handle, the other end with by the 4th angle pulley with second conduct restrict connect.
Further, the side of support frame as described above two is arranged with electronic grip device.
Further, the front end of support frame as described above bottom is provided with foot's dynamometer, and the front end of support frame as described above bottom is provided with
Foot's dynamometer;
Foot's dynamometer includes U-type groove of the hinge joint in support frame bottom, is provided with the U-type groove upper surface and is connected to support
The elastic plate of frame bottom, elastic back are provided with pressure inductor, and drawstring is connected to U-type groove upper surface.
Further, also without positioning magnetic part in the 3rd connector connection, the back rest back side is provided with metal
Plate.
Further, the counterweight elastomeric element is provided with positioning magnetic part.
Further, it is described socket rope second conduction rope between by transfer rope connection, the back rest back side with
Relative another of second fixed pulley is then provided with the 3rd fixed pulley;
Described switching rope one end is fixed on the back rest back side, the other end by the 3rd fixed pulley, the first fixed pulley with socketing rope
Connection, transfer and movable pulley is additionally provided with restricting, the second conduction rope is connected with movable pulley.
Beneficial effects of the present invention:
1st, small volume, function are more, easy to use, conveniently moving.
2nd, counterweight elastomeric element(It is made up of elastomeric element)Substituted for original bulky balance weight iron, elastomeric element using spring as
Example, the weight of one can provide 5-35 times of the pulling force more than own wt typically between 0.1-0.3 kilograms, such as
When 50 kilograms of body-building power is provided, it is necessary to using 13 springs, or more than 11 pieces 4.5 kilograms of balance weight irons, it is another need to adjust be good for
During body power, spring(Elastomeric element)The prestretching force of elastomeric element is controlled by regulation handle, you can to adjust spring offer
Body-building power, counterweight iron rule need to realize by increasing or decreasing counterweight quantity or changing the balance weight iron of different weight.
3rd, apparatus of the present invention go for different crowds, it is only necessary to which counterweight elastomeric element prestretching force is adjusted
Section, you can.
4th, inventive point of the invention is, body-building power is provided by elastomeric element, can also be to by accurately controlling elasticity
The size that the pre-stretching of part provides it body-building power is accurately controlled, and makes device tighter additionally by cleverly design
Gather, the body-building power that elastomeric element provides can be used for neck, shoulder, four limbs, the back of the body, waist, chest, abdominal muscles group are carried out forging refining.
5th, electronic grip device, foot's dynamometer very easily can carry out strength measure to human upper limb, lower limb, not only side
Just using being all measured at any time, it can also facilitate and measure is tracked in the change of rehabilitation stage upper and lower limb strength to patient.
Brief description of the drawings
Fig. 1 is positive structure schematic of the present invention.
Fig. 2 is back structures schematic diagram of the present invention.
Fig. 3 is that the present invention swings modular construction schematic diagram.
Fig. 4 is that the present invention leans forward moving parts structural representation.
Fig. 5 is that the present invention swings up and down modular construction schematic diagram.
Fig. 6 is up-down stretch structural representation of the present invention.
Fig. 7 is foot's dynamometer structural representation of the present invention.
In figure, seat 1, support frame 2, back rest 3, arm-rest frame 4, the conduction of counterweight elastomeric element 5, first rope 6, switching part
7th, the second conduction rope 8, steering handle 9, the second fixture 10, the 4th fixture 11, motion bar 12, regulation handle 13, electronics are held
Power device 14, foot's dynamometer 15, switching rope 16, movable pulley 17, positioning magnetic part 18, fixed arm-rest frame 41, movable hand rail frame 42,
First connecting rope 43, the first keeper 44, the first loading component 45, the first connector 46, the first power-assisted elastomeric element 47, first
Angle pulley 48, the first fixed pulley 51, the second fixed pulley 52, the 3rd fixed pulley 53, top sheave 71, lower sheave the 72, the 3rd connect
Part 73, the second connecting rope 91, the second keeper 92, the second loading component 93, the second connector 94, the second power-assisted elastomeric element
95th, the second angle pulley 97, socket rope 131, hand handle 132, U-type groove 151, elastic plate 152, pressure inductor 153, drawstring 154.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As illustrated in fig. 1 and 2, a kind of multifunctional body-building chair, ab lounge includes seat 1, and is located at the support frame of the bottom of seat 1
2, back rest 3 is provided with the top edge of seat 1, the side of back rest 3 two symmetrically respectively sets an arm-rest frame 4, described to lean on
The back side of backrest 3 is provided with counterweight elastomeric element 5, it is preferred that and counterweight elastomeric element 5 respectively sets a fix bar including upper and lower two end, and two
More elastomeric elements are provided between the individual fix bar, can be according to the age of user, sex and health, elastomeric element
Tension spring, rubber spring, hair can be selected to adjust spring etc. both flexible passing power or motion can act on, have damping to make again
Part;
Arm-rest frame 4 includes the fixation arm-rest frame 41 being connected with back rest 3 and/or seat 1, movable hand rail frame 42 and fixed arm-rest frame
41 are flexibly connected(Preferably, movable hand rail frame 42 is connected with fixed arm-rest frame 41 by rotating shaft), movable hand rail frame 42 is along parallel
The face of seat is moved back and forth, and in Fig. 3, symmetrically arranged two movable hand rails 42 are connected by the first connecting rope 43, the
One connecting rope 43 is provided with the first keeper 44, and the first keeper 44 is connected with the first loading component 45 by the first connector 46
Connect, the one end of the first power-assisted elastomeric element 47 is connected with the first connector 46, first on the other end and the frontal plane of projection of seat 1 fixes
Part connects(Preferably, the first fixture can be located on support frame);
First angle pulley 48 is located in the lower support frame 2 of seat 1;
The upper end of counterweight elastomeric element 5 is connected to the upper end at the back side of back rest 3, the lower end of counterweight elastomeric element 5 and passes through the first conduction rope 6
It is connected with switching part 7, second 8 one end of conduction rope are connected with switching part 7, the other end adds by the first angle pulley 5, first
Carry part 45 to be connected with the second fixture 10 on the frontal plane of projection of seat 1, counterweight elastomeric element 5 passes through the first conduction rope 6, switching
Part 7 gives the tensile force of the second conduction rope 8, can, first loading unit spacing to the first loading component 5 after the tensioning of the second conduction rope 8
After part 5 is limited, it can not be moved up under being acted in non-outside;
When progress upper limbs swings, two movable hand rail framves 42 are simultaneously or one of movable hand rail frame 42 is by upper limbs drives edge
The face of parallel seat moves back and forth, and two or the movement of movable hand rail frame 42 can move up the tensioning of the first connecting rope 43,
First connecting rope 43 is moved up, the first keeper 44 thereon can also move up, and the first keeper 44 is moved up and led to
Cross the first connector 46 and upward power is conducted to the first loading component 45, the first loading component 45 is in the first power-assisted elastomeric element
47 and second conduction rope 8 it is spacing under, the first loading component 45 non-external force effect under it is immovable, when the first loading component 45 by
During upward power, the first power-assisted elastomeric element 47 and the second conduction rope 8 can apply down force to the first loading component 45(Downwards
Active force is the power that upper limbs movement movable hand rail frame 42 needs to overcome, while is also that the movable hand rail frame 42 that swings needs to pass through
The power that second conduction rope 8 does work to counterweight elastomeric element 5).
Preferably, it is symmetrical on the support frame 2 of the side of back rest 3 two that a steering handle 9, steering handle 9 are respectively set
It is movably connected on support frame 2, steering handle 9 moves back and forth along perpendicular to the face of seat 1;
In Fig. 4, symmetrically arranged two steering handles 9 are connected by the second connecting rope 91, are set in the second connecting rope 91
There is the second keeper 92, the second keeper 92 is connected with the first loading component 93 by the second connector 94, the second power-assisted elasticity
The one end of part 95 is connected with the second connector 94, the 3rd fixture on the other end and the frontal plane of projection of seat 1 connects;
Second angle pulley 97 is located in the lower support frame 2 of seat 1, it is preferred that the first angle pulley 48 and second turns to
Pulley 97 designs side by side;
Switching part 7 includes top sheave 71, lower sheave 72, and top sheave 71 is connected with lower sheave 72 by the 3rd connector 73, excellent
Choosing, also without positioning magnetic part 18 in the connection of the 3rd connector, the back rest back side is provided with metallic plate, the first conduction rope 6
It is connected with top sheave 71, second conduction 8 one end of rope are by lower sheave 72, the second angle pulley 97, the second loading component 93 with sitting
The 4th fixture 11 on plate frontal plane of projection connects.
When carrying out upper limbs swing, two steering handles 9 are simultaneously or one of steering handle 9 is hung down by upper limbs drives edge
Directly being moved back and forth in the face of seat, two or the movement of steering handle 9 can move up the tensioning of the second connecting rope 91, and second
Connecting rope 91 moves up, the second keeper 92 thereon can also move up, and the second keeper 92 moves up and by
Upward power is conducted to the second loading component 93 by two connectors 94, the second loading component 93 in the second power-assisted elastomeric element 95 and
Second conduction rope 8 it is spacing under, the second loading component 93 non-external force effect under it is immovable, when the second loading component 93 is by upward
During pulling force, the second power-assisted elastomeric element 95 and the second conduction rope 8 can apply down force to the second loading component 93(Make downwards
It is firmly the power that the movable steering handle 9 of upper limbs movement needs to overcome).
Preferably, the first fixed pulley 51 is located among the upper end at the back side of back rest 3, and the second fixed pulley 52 is located at back rest 3
The side of back side upper end;
First 6 one end of conduction rope are connected with the lower end of counterweight elastomeric element 5, the other end passes through the fixed pulley 51 of top sheave 71 and first,
Second fixed pulley 52 is connected with being located at the regulation handle 13 of one of fixed handrail 41;
The first conduction rope 6 can be tightened up or loosened to regulation handle 13, when regulation handle tightens up the first conduction rope 6, counterweight can be made elastic
Part 5 produces pretension, and the pretension of counterweight elastomeric element 5 can conduct rope 8 by the first conduction rope 6, switching part 7 to second
Conducted, when needing that the second conduction rope 8 is done work or applied when external force changes its position, it is necessary to first overcome counterweight bullet
The pretension of property part 5, is then done work to counterweight elastomeric element 5, you can to adjust counterweight by regulation handle 13 again
The pretension size of elastomeric element 5, so as to realize the regulation to the second conduction 8 applying powers of rope.
Preferably, as in Fig. 5, the lower surface of seat 1 is provided with hinge joint motion bar 12;
Second fixture 10 is the 3rd angle pulley, and second conduction 8 one end of rope are by the 3rd angle pulley and motion bar 12(It is preferred that
, fixing hole is additionally provided with motion bar 12, second conduction 8 one end of rope are connected through fixing hole with lower end handle 19, in use, can
To shake hands 19 pair second to conduct the application external force of rope 8 by lower end)Connection, the second conduction rope 8 conduct the strength of counterweight elastomeric element 5
To motion bar 12, when lower limb or when swinging up and down motion bar 12 with upper limbs, motion bar 12 is restricted by the second conduction 8 will be to counterweight
Elastomeric element 5 does work.
Preferably, as in Fig. 6, the top of back rest 3 is provided with hand handle 132;
4th fixture 11 is the 4th angle pulley;
Socket that 131 one end of rope are connected with hand handle 132, the other end conducts to restrict and 8 is connected by the 4th angle pulley with second.
Preferably, it is described socket rope 131 and second conduction rope 8 between by transfer rope 14 connection, carried on the back in the back rest 1
Another relative with the second fixed pulley 52 in face is then provided with the 3rd fixed pulley 53;
Described 16 one end of switching rope are fixed on the back side of back rest 1, the other end by the 3rd fixed pulley 53, the first fixed pulley 51 with
The connection of rope 131 is socketed, movable pulley 17 is additionally provided with switching rope 16, the second conduction rope 8 is connected with movable pulley 15.
When upper limbs pulls hand handle 132, socket rope 131 and be pulled together with hand handle 132, socket rope 131 when pulled, therewith
The switching rope 16 of connection is also pulled together, and power is conducted into the second conduction rope 8 by movable pulley 17 after the pulling of switching rope 16, the
Power is conducted to counterweight elastomeric element 5 by two conduction ropes 8, realizes the acting to counterweight elastomeric element 5.
In Fig. 1, the side of support frame 2 two is arranged with electronic grip device 14, can be to upper limbs power by electronic grip device 14
Amount is measured.
Preferably, the front end of the bottom of support frame 2 is provided with foot's dynamometer 15, and in Fig. 7, foot's dynamometer 15 includes
The U-type groove 151 in support frame bottom is linked, the elastic plate for being connected to support frame bottom is provided with the upper surface of U-type groove 151
152, the back side of elastic plate 152 is provided with pressure inductor 153, and drawstring 154 is connected to the upper surface of U-type groove 151, and pin, which stretches into, sockets rope
Between 154 and elastic plate 152, when pin is to when rising to the bait, U-type groove 151 can be driven to be rotated up, realize U-type groove 151 to elastic plate
The pressure inductor 153 at 152 back sides is oppressed, so as to measure the strength that pin is risen to the bait, i.e. pulling force, when pin downwards exert oneself compression elasticity
During plate 152, the deformation of elastic plate 152 makes pressure inductor 153 thereon oppress U-type groove 151, so as to measure underfooting pressure
Amount, i.e. stretch.
Preferably, counterweight elastomeric element 5, which is provided with, positions magnetic part 18, the positioning magnetic part 18 on counterweight elastomeric element 5
The relative positioning of counterweight elastomeric element 5 can be made on the back side of back rest 3.
Operation principle:
1)The operation principle of counterweight elastomeric element 5
The lower end of counterweight elastomeric element 5 is connected with the first conduction rope 6, the other end passes through switching part 7, the first fixed pulley 51, second
Fixed pulley 52 is connected with regulation handle 13, the tensioning of first conduction of the regulation of regulation handle 13 rope 6 or the degree loosened, if tensioning
(I.e. regulation handle 13 tightens up the first conduction rope 6)Pretension caused by the more big then counterweight elastomeric element 5 of degree is bigger, such as more puts
Pine(I.e. regulation handle 13 does not apply pulling force to the first conduction rope 6)Then pretension is smaller, pretension caused by counterweight elastomeric element 5
Bigger, then outwards output prestressing force is bigger for the first conduction rope 6;
2)The operation principle at other work work(positions
Second conduction rope 8 receives the prestressing force of the output of the first conduction rope 6 by switching part 7, and second conduction 8 one end of rope pass through the
One angle pulley the first angle pulley 48, the first loading component 45 are connected with motion bar 12, when 42 outside side-sway of movable hand rail frame
When dynamic, vertical change in displacement occurs for the first connecting rope 43, and second conduction 8 pair of first displacement of connecting rope 43 of rope applies resistance, when
When motion bar 12 is swung up, second conduction 8 pairs of motion bars 12 of rope produce pulling force;
Second conduction 8 other ends of rope pass through the second angle pulley 97, the second loading component 93, the 4th fixture 11(4th turns to
Pulley), the 3rd fixed pulley 53 131 be connected with socketing rope, when steering handle 9 moves forward, the second connecting rope 91 occurs vertically
Change in displacement, restrict 8 pair of second displacement of connecting rope 91 of the second conduction apply resistance, when being connected to the quilt of hand handle 132 that sockets rope 131
When being moved to bottom, second conduction 8 pairs of hand handles of rope produce pulling force;
I.e. movable hand rail frame 42 is swung out, motion bar 12 is swung up, steering handle 9 moves forward, hand handle 132 moves down
When, second conduction 8 pairs of counterweight elastomeric elements 5 of rope do work, and are deformed counterweight elastomeric element 5;
The inside swing of movable hand rail frame 42, motion bar 12 are to lower swing, steering handle 9 is moved rearwards, hand handle 132 moves up
When, counterweight elastomeric element 5 resets.
Regulation handle can use HSH-DCR(Manually Lever Chain Hoist).
The above embodiments are only the preferred technical solution of the present invention, and are not construed as the limitation for the present invention, this Shen
Please in embodiment and embodiment in feature in the case where not conflicting, can mutually be combined.The protection model of the present invention
Enclose the equivalent substitution side of technical characteristic in the technical scheme that should be recorded with claim, including the technical scheme of claim record
Case is protection domain.Equivalent substitution i.e. within this range is improved, also within protection scope of the present invention.
Claims (10)
1. a kind of multifunctional body-building chair, ab lounge includes seat, and is located at the support frame of seat bottom, in the seat upper edge
Edge is provided with back rest, and the side of back rest two symmetrically respectively sets an arm-rest frame, it is characterised in that:The back rest back side is provided with
Counterweight elastomeric element;
The arm-rest frame includes the fixation arm-rest frame being connected with the back rest and/or seat, movable hand rail frame and fixed handrail
Frame is flexibly connected, and face of the movable hand rail frame along parallel seat moves back and forth, and symmetrically arranged two movable hand rails lead to
The connection of the first connecting rope is crossed, the first connecting rope is provided with the first keeper, and the first keeper and the first loading component pass through first
Connector is connected, and first power-assisted elastomeric element one end is connected with the first connector, first on the other end and seat frontal plane of projection
Fixture connects;
First angle pulley is located in seat lower support frame;
The counterweight elastomeric element upper end is connected to the upper end at the back rest back side, lower end and connected by the first conduction rope with switching part
Connect, one end is connected the second conduction rope with switching part, the other end is just thrown by the first angle pulley, the first loading component and seat
The second fixture connection on shadow face.
A kind of 2. multifunctional body-building chair according to claim 1, it is characterised in that:Support frame in the side of back rest two
Upper symmetrical respectively one steering handle of setting, steering handle are movably connected on support frame, and steering handle is along perpendicular to the face of seat
Move back and forth;
Symmetrically arranged two steering handles are connected by the second connecting rope, and the second connecting rope is provided with the second keeper,
Second keeper is connected with the first loading component by the second fitting, and second power-assisted elastomeric element one end connects with the second connector
Connect, the 3rd fixture connection on the other end and seat frontal plane of projection;
Second angle pulley is located in seat lower support frame;
The switching part includes top sheave, lower sheave, and top sheave is connected with lower sheave by the 3rd connector, the first conduction rope
It is connected with top sheave, lower sheave, the second angle pulley, the second loading component and seat frontal plane of projection are passed through in second conduction rope one end
On the 4th fixture connection.
A kind of 3. multifunctional body-building chair according to claim 2, it is characterised in that:First fixed pulley is located at back rest
Among the upper end at the back side, the second fixed pulley is located at the side of back rest back side upper end;
Described first conduction rope one end is connected with counterweight elastomeric element lower end, the other end passes through top sheave and the first fixed pulley, the
Two fixed pulleys are connected with being located at the regulation handle of one of fixed handrail;
The first conduction rope can be tightened up or loosened to the regulation handle.
A kind of 4. multifunctional body-building chair according to claim 1, it is characterised in that:The seat lower surface is provided with hinge joint and lived
Lever;
Second fixture is the 3rd angle pulley, and second conduction rope one end is connected by the 3rd angle pulley with motion bar.
A kind of 5. multifunctional body-building chair according to claim 2, it is characterised in that:The top of the back rest is provided with hand
;
4th fixture is the 4th angle pulley;
Socket rope one end be connected with hand handle, the other end with by the 4th angle pulley with second conduct restrict connect.
A kind of 6. multifunctional body-building chair according to claim 1, it is characterised in that:The side of support frame as described above two is arranged with electricity
Sub- spring-grip.
A kind of 7. multifunctional body-building chair according to claim 1, it is characterised in that:The front end of support frame as described above bottom is provided with
Foot's dynamometer;
Foot's dynamometer includes U-type groove of the hinge joint in support frame bottom, is provided with the U-type groove upper surface and is connected to support
The elastic plate of frame bottom, elastic back are provided with pressure inductor, and drawstring is connected to U-type groove upper surface.
A kind of 8. multifunctional body-building chair according to claim 2, it is characterised in that:Do not have also in the 3rd connector connection
There is positioning magnetic part, the back rest back side is provided with metallic plate.
A kind of 9. multifunctional body-building chair according to claim 1, it is characterised in that:The counterweight elastomeric element is provided with fixed
Position magnetic part.
A kind of 10. multifunctional body-building chair according to claim 5, it is characterised in that:The rope that sockets is restricted with the second conduction
Between by rope connection of transferring, at the back rest back side, another relative with the second fixed pulley is then provided with the 3rd fixed pulley;
Described switching rope one end is fixed on the back rest back side, the other end by the 3rd fixed pulley, the first fixed pulley with socketing rope
Connection, transfer and movable pulley is additionally provided with restricting, the second conduction rope is connected with movable pulley.
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CN107551450B (en) | 2022-08-12 |
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