CN107441675B - A kind of multi-stage buffering structure of exercise treadmills plate - Google Patents
A kind of multi-stage buffering structure of exercise treadmills plate Download PDFInfo
- Publication number
- CN107441675B CN107441675B CN201710719590.7A CN201710719590A CN107441675B CN 107441675 B CN107441675 B CN 107441675B CN 201710719590 A CN201710719590 A CN 201710719590A CN 107441675 B CN107441675 B CN 107441675B
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- bull stick
- plate
- main body
- layer
- pedestal
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/02—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills
- A63B22/0207—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills having shock absorbing means
- A63B22/0214—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills having shock absorbing means between the belt supporting deck and the frame
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/02—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills
- A63B22/0207—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills having shock absorbing means
- A63B22/0221—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills having shock absorbing means on the frame supporting the rollers
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/02—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills
- A63B22/0285—Physical characteristics of the belt, e.g. material, surface, indicia
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- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Tools (AREA)
Abstract
The invention discloses a kind of multi-stage buffering structures of exercise treadmills plate, main body including treadmill, the main body is equipped with treadbelt and runs plate, the lower end of the main body is equipped with pedestal, the both ends of the pedestal are respectively equipped with shaft and slide bar, the slide bar is located at the outside of shaft, the both ends of the shaft are equipped with bull stick, the bull stick is equipped with bull stick buffer unit, the lower end of the bull stick is equipped with idler wheel, sleeve there are two being set on the slide bar, lateral buffer spring is connected between sleeve described in two, attachment base there are two being set in the main body, the lower end of attachment base described in two is hinged with connecting rod, the connecting rod and sleeve are hinged, the both ends of the pedestal are equipped with telescopic rod, the both ends of the main body are respectively arranged below with two telescopic holes, the outside of the telescopic rod is equipped with longitudinal buffer spring, by the way that multi-buffer is arranged, transverse and longitudinal is more Orientation bumper and absorbing shock, buffers seismaesthesia layer by layer, reduces treadmill to the anti-force of human body, alleviates the pressure of knee joint and lumbar vertebrae.
Description
Technical field
The present invention relates to treadmill field, specially a kind of multi-stage buffering structure of exercise treadmills plate.
Background technique
Treadmill is the standing fitness equipment of family and gymnasium, and is simplest one in current family fitness equipment
Kind, it is the optimal selection of Domestic health care exercising apparatus.Treadmill is divided into mechanical treadmill and electric treadmill, and mechanical treadmill is by race
The frictional force of step person's foot and treadmill belt drives to run, and briefly electric treadmill is that treadmill belt fortune is driven by motor
Row, electric treadmill is the equipment of gymnasium and family's higher gears, it by motor drive treadbelt make one at different rates by
It runs or walks about dynamicly.Due to passively formed run and walk, from movement shape from, almost with commonly run or walk one on the ground
Sample, but from exerting oneself from human body, it run in electric treadmill, walk and eliminate a leg extension than commonly running, walking.Exactly this
Putting, which makes each walk the people of race in electric treadmill, feels very free and relaxed, can make one than more races 1/3 or so of commonly running
Distance, energy consumption also than commonly walk, run be it is more.
In order to make treadmill reduce the impact to the person when in use, increase the comfort of running, general treadmill is all set
In respect of plate buffer unit is run, some treadmills use soft race plate shock-absorbing, run plate than relatively thin, the deformation by running version absorbs user
The kinetic energy generated when movement, achievees the effect that buffering.This buffering method cannot disperse to fall running board of running machine and close to knee well
The impact force generated is saved, and steps down in run and has a kind soft feeling above plate, foot is stepped on shaky, and a left side for body is be easy to cause to shake the right side
It shakes, safety can be poor, if the running board of running machine long period is in bending state, is easy to cause and runs plate deformation, service life is short.
Summary of the invention
The purpose of the present invention is to provide a kind of multi-stage buffering structures of exercise treadmills plate, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the invention provides the following technical scheme: a kind of multi-stage buffering structure of exercise treadmills plate,
Main body including treadmill, the main body are equipped with treadbelt and run plate, and plate is run in the treadbelt winding, and is not contacted between the two,
The treadbelt is equipped with buffer layer, and the top of the buffer layer is equipped with puigging, and the top of the puigging is equipped with wearing coat,
The rough surface of the wearing coat, the inner hollow for running plate form hollow layer, are equipped in the hollow layer and run plate buffering
The lower end of device, the main body is equipped with pedestal, and the both ends of the pedestal are respectively equipped with shaft and slide bar, and the slide bar is located at shaft
Outside, the both ends of the shaft are equipped with bull stick, and the bull stick is equipped with bull stick buffer unit, and the lower end of the bull stick is equipped with rolling
It takes turns, is set on the slide bar there are two sleeve, be connected with lateral buffer spring between sleeve described in two, the main body is equipped with
The lower end of two attachment bases, attachment base described in two is hinged with connecting rod by hinged seat, and the lower end of the connecting rod passes through hinged
The both ends of seat hinged sleeve, the pedestal are equipped with telescopic rod, and the both ends of the main body are respectively arranged below with two telescopic holes, described
The position of telescopic hole and the position of telescopic rod correspond, and in the telescopic rod insertion telescopic hole, and the top of telescopic rod is equipped with
Anti-drop block, the outside of the telescopic rod are equipped with longitudinal buffer spring, the upper and lower side of the longitudinal buffer spring respectively with main body and
Pedestal is fixedly connected.
As a preferred technical solution of the present invention, the buffer layer is made of silica gel material, and the puigging is adopted
It is made of deadening felt, the wearing coat is made of butadiene rubber.
As a preferred technical solution of the present invention, the race plate buffer unit includes rubber column, and the rubber column has
Several, the rubber column is uniformly distributed on hollow layer, and the upper and lower ends of the rubber column, which are separately connected, runs the upper and lower of plate
End, the upper end for running plate are made of rubber material.
As a preferred technical solution of the present invention, bearing is equipped between the shaft and main body.
As a preferred technical solution of the present invention, the surface of the idler wheel is equipped with elastic layer, the telescopic hole it is interior
Wall is equipped with wearing layer, and the surface of the wearing layer is smooth, and the elastic layer and wearing layer are all made of isoprene rubber support.
As a preferred technical solution of the present invention, the bull stick buffer unit includes bull stick inserted link and bull stick jack,
The bull stick inserted link is fixed on bull stick, and the lower end surface of main body, and the position of position and bull stick inserted link is arranged in the bull stick jack
Correspondence is set, the bull stick inserted link is inserted into bull stick jack.
As a preferred technical solution of the present invention, bull stick buffer spring, institute are nested on the outside of the bull stick inserted link
The upper and lower ends for stating bull stick buffer spring are separately connected pedestal and bull stick.
Compared with prior art, the beneficial effects of the present invention are: a kind of exercise treadmills plate provided by the present invention it is more
Grade buffer structure, can when so that user using treadmill by the way that buffer layer, puigging and wearing coat are arranged in treadbelt
The ability of damping, buffering is provided for user, and the noise generated when movement can be reduced, while can be improved the use of treadbelt
Service life；Buffering of the power generated when user movement Jing Guo treadbelt, which is transmitted to, runs on plate, by running setting race plate buffering dress in plate
It sets, further absorbs power, form second level buffering；When race plate is moved downward by gravity, by longitudinal buffer
The effect of spring, lateral buffer spring and bull stick buffer unit, ensure that the sense of equilibrium of treadmill, and can disperse to close knee
The impact force of section is significantly low to reduce kneed injury.In conclusion the present invention passes through setting multi-buffer, and it is arranged
The multi-faceted bumper and absorbing shock of transverse and longitudinal, buffers seismaesthesia layer by layer, reduces treadmill to the anti-force of human body, alleviates knee joint and waist
The pressure of vertebra, and can reduce the noise generated when movement, reduce the influence to environment, while will not influence making for treadmill
Use the service life.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the schematic enlarged-scale view of A of the present invention；
Fig. 3 is schematic side view of the present invention；
Fig. 4 is the wear-resisting schematic diagram of a layer structure of the present invention；
Fig. 5 is that the present invention runs plate and treadbelt structural schematic diagram.
In figure: 1- main body；2- treadbelt；3- runs plate；4- buffer layer；5- puigging；The wearing coat 6-；7- hollow layer；8- is run
Plate buffer unit；9- shaft；10- bull stick；11- idler wheel；12- pedestal；13- slide bar；14- sleeve；15- transverse direction buffer spring；16-
Attachment base；17- connecting rod；18- telescopic rod；19- telescopic hole；20- anti-drop block；21- longitudinal buffer spring；22- rubber column；23- axis
It holds；24- elastic layer；25- wearing layer；26- bull stick buffer unit；27- bull stick inserted link；28- bull stick jack；29- bull stick buffering elastic
Spring.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The explanation of following embodiment be with reference to attached drawing, can be to the specific embodiment implemented to the example present invention.
The direction and position term that the present invention is previously mentioned, for example, "upper", " in ", "lower", "front", "rear", "left", "right", "inner", "
Outside ", " side " etc. is only direction and position with reference to annexed drawings.Therefore, the direction and position term used is to illustrate
And understand the present invention, rather than to limit the present invention.
Embodiment:
As shown in Figure 1, a kind of multi-stage buffering structure of exercise treadmills plate provided by the invention, the main body including treadmill
1, the main body 1 is equipped with treadbelt 2 and runs plate 3, and plate 3 is run in the winding of treadbelt 2, and is not contacted between the two, in the treadbelt 2
Equipped with buffer layer 4, the top of the buffer layer 4 is equipped with puigging 5, and the top of the puigging 5 is equipped with wearing coat 6, described
The rough surface of wearing coat 6, the inner hollow for running plate 3 form hollow layer 7, are equipped in the hollow layer 7 and run plate buffering
The lower end of device 8, the main body 1 is equipped with pedestal 12, and the both ends of the pedestal 12 are respectively equipped with shaft 9 and slide bar 13, the cunning
Bar 13 is located at the outside of shaft 9, and the both ends of the shaft 9 are equipped with bull stick 10, and the bull stick 10 is equipped with bull stick buffer unit 26,
The lower end of the bull stick 10 is equipped with idler wheel 11, is set on the slide bar 13 there are two sleeve 14, is connected between sleeve 14 described in two
It is connected to lateral buffer spring 15, is set in the main body 1 there are two attachment base 16, the lower end of attachment base 16 described in two passes through hinge
Joint chair is hinged with connecting rod 17, and by hinged seat hinged sleeve 14, the both ends of the pedestal 12, which are equipped with, stretches for the lower end of the connecting rod 17
Contracting bar 19, the both ends of the main body 1 are respectively arranged below with two telescopic holes 19, position and the telescopic rod 18 of the telescopic hole 19
Position corresponds, and the telescopic rod 18 is inserted into telescopic hole 19, and the top of telescopic rod 18 is equipped with anti-drop block 20, described flexible
The outside of bar 18 is equipped with longitudinal buffer spring 21, and the upper and lower side of the longitudinal buffer spring 21 is solid with main body 1 and pedestal 12 respectively
Fixed connection.
Preferably, as shown in figure 5, the buffer layer 4 is made of silica gel material, the effect of vibration reduction and cushioning is provided for treadbelt 2
Fruit, puigging 5 are made of deadening felt, and noise when reducing using treadmill, the wearing coat 6 uses butadiene rubber system
At the service life of raising treadbelt 2
Preferably, as shown in Figure 3 and Figure 5, the race plate buffer unit 7 includes rubber column 23, if the rubber column 22 has
Dry, for the rubber column 22 uniformly on distribution hollow layer 7, the upper and lower ends of the rubber column 22, which are separately connected, runs plate 3
Upper and lower side, the upper end for running plate 3 are made of rubber material, run plate buffer unit 7 by setting, improve the slow of treadmill
Rush ability.
Preferably, as shown in figures 1 and 3, it is equipped with bearing 23 between the shaft 9 and main body 1, reduces shaft 9 and is moved through
Coefficient of friction in journey, and guarantee its rotating accuracy.
Preferably, as shown in figures 1 and 3, the surface of the idler wheel 11 is equipped with elastic layer 24, the inner wall of the telescopic hole 20
It is equipped with wearing layer 25, the surface of the wearing layer 25 is smooth, and the elastic layer 24 and wearing layer 25 are all made of isoprene rubber branch
Support increases buffering effect, by the way that wearing layer 25 is arranged, reduces rubbing in 19 motion process of telescopic rod by the way that elastic layer 24 is arranged
Coefficient is wiped, and protects telescopic rod 19 and telescopic hole 20, extends their service life.
Preferably, as shown in figures 1 and 3, the bull stick buffer unit 26 includes bull stick inserted link 27 and bull stick jack 28, institute
It states bull stick inserted link 27 to be fixed on bull stick, the lower end surface of main body, and position and bull stick inserted link 27 is arranged in the bull stick jack 28
Position it is corresponding, the bull stick inserted link 27 is inserted into bull stick jack 28, and the outside of the bull stick inserted link 27 is nested with bull stick buffering
The upper and lower ends of spring 29, the bull stick buffer spring 29 are separately connected pedestal 12 and bull stick 10.
The main characteristic of the invention lies in that a kind of multi-stage buffering structure of exercise treadmills plate provided by the present invention, leads to
It crosses and buffer layer 4, puigging 5 and wearing coat 6 is set in treadbelt 2, when so that user using treadmill, can be provided for user
The ability of damping, buffering, and the noise generated when movement can be reduced, while can be improved the service life of treadbelt；User's fortune
Buffering of the power generated when dynamic Jing Guo treadbelt 2, which is transmitted to, runs on plate 3, by running setting race plate buffer unit 7 in plate 3, into one
The absorption power of step forms second level buffering；When run plate 3 moved downward by gravity when, by longitudinal buffer spring 15,
The effect of lateral buffer spring 21 and bull stick buffer unit 26 plays the multi-faceted damping, buffering of transverse and longitudinal, ensure that treadmill
The sense of equilibrium, and can disperse to kneed impact force, it is significantly low to reduce kneed injury.In conclusion of the invention
By the way that multi-buffer is arranged, and the multi-faceted bumper and absorbing shock of transverse and longitudinal is set, buffers seismaesthesia layer by layer, reduces treadmill to human body
Anti-force, alleviate the pressure of knee joint and lumbar vertebrae, and can reduce the noise generated when movement, reduce the shadow to environment
It rings, while will not influence the service life of treadmill.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (7)
1. a kind of multi-stage buffering structure of exercise treadmills plate, it is characterised in that: the main body (1) including treadmill, the main body
(1) treadbelt (2) are equipped with and run plate (3), plate (3) are run in treadbelt (2) winding, and are not contacted between the two, the treadbelt (2)
It is equipped with buffer layer (4), the top of the buffer layer (4) is equipped with puigging (5), and the top of the puigging (5) is equipped with wear-resisting
Surface layer (6), the rough surface of the wearing coat (6), it is described run plate (3) inner hollow, formed hollow layer (7), it is described in
It is equipped in dead level (7) and runs plate buffer unit (8), the lower end of the main body (1) is equipped with pedestal (12), the both ends of the pedestal (12)
It is respectively equipped with shaft (9) and slide bar (13), the slide bar (13) is located at the outside of shaft (9), and the both ends of the shaft (9) are equipped with
Bull stick (10), the bull stick (10) are equipped with bull stick buffer unit (26), and the lower end of the bull stick (10) is equipped with idler wheel (11), institute
It states and is set on slide bar (13) there are two sleeve (14), be connected with lateral buffer spring (15), institute between sleeve (14) described in two
It states there are two being set on main body (1) attachment base (16), the lower end of attachment base (16) described in two is hinged with connecting rod by hinged seat
(17), the lower end of the connecting rod (17) is equipped with telescopic rod by hinged seat hinged sleeve (14), the both ends of the pedestal (12)
(18), the both ends of the main body (1) are respectively arranged below with two telescopic holes (19), the position of the telescopic hole (19) and telescopic rod
(18) position corresponds, and in telescopic rod (18) insertion telescopic hole (19), and the top of telescopic rod (18) is equipped with anticreep
The outside of block (20), the telescopic rod (18) is equipped with longitudinal buffer spring (21), the upper and lower side of the longitudinal buffer spring (21)
It is fixedly connected respectively with main body (1) and pedestal (12).
2. a kind of multi-stage buffering structure of exercise treadmills plate according to claim 1, it is characterised in that: the buffer layer
(4) it is made of silica gel material, the puigging (5) is made of deadening felt, and the wearing coat (6) uses butadiene rubber system
At.
3. a kind of multi-stage buffering structure of exercise treadmills plate according to claim 1, it is characterised in that: the race plate is slow
Flushing device (8) includes rubber column (22), and the rubber column (22) has several, and the rubber column (22) is uniformly distributed hollow
On layer (7), the upper and lower ends of the rubber column (22) are separately connected the upper and lower side for running plate (3), and the upper end for running plate (3) uses
Rubber material is made.
4. a kind of multi-stage buffering structure of exercise treadmills plate according to claim 1, it is characterised in that: the shaft
(9) bearing (23) are equipped between main body (1).
5. a kind of multi-stage buffering structure of exercise treadmills plate according to claim 1, it is characterised in that: the idler wheel
(11) surface is equipped with elastic layer (24), and the inner wall of the telescopic hole (19) is equipped with wearing layer (25), the wearing layer (25)
Surface it is smooth, the elastic layer (24) and wearing layer (25) are all made of isoprene rubber support.
6. a kind of multi-stage buffering structure of exercise treadmills plate according to claim 1, it is characterised in that: the bull stick is slow
Flushing device (26) includes bull stick inserted link (27) and bull stick jack (28), and the bull stick inserted link (27) is fixed on bull stick, and described turn
The lower end surface of main body is arranged in bar jack (28), and position is corresponding with the position of bull stick inserted link (27), the bull stick inserted link (27)
It is inserted into bull stick jack (28).
7. a kind of multi-stage buffering structure of exercise treadmills plate according to claim 6, it is characterised in that: the bull stick is inserted
It is nested on the outside of bar (27) bull stick buffer spring (29), the upper and lower ends of the bull stick buffer spring (29) are separately connected pedestal
(12) and bull stick (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710719590.7A CN107441675B (en) | 2017-08-21 | 2017-08-21 | A kind of multi-stage buffering structure of exercise treadmills plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710719590.7A CN107441675B (en) | 2017-08-21 | 2017-08-21 | A kind of multi-stage buffering structure of exercise treadmills plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107441675A CN107441675A (en) | 2017-12-08 |
| CN107441675B true CN107441675B (en) | 2019-04-19 |
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| CN201710719590.7A Active CN107441675B (en) | 2017-08-21 | 2017-08-21 | A kind of multi-stage buffering structure of exercise treadmills plate |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108237255A (en) * | 2018-01-16 | 2018-07-03 | 嘉兴洁阳电子科技有限公司 | A kind of aluminum-pinch automatic gauging cutter device |
| CN108381996B (en) * | 2018-03-15 | 2020-01-14 | 温州盛淼工业设计有限公司 | Packaging paperboard printing equipment |
| CN108579006A (en) * | 2018-06-14 | 2018-09-28 | 泰州职业技术学院 | A kind of lower limbs health care device with foot massages effect |
| CN111729326A (en) * | 2018-08-29 | 2020-10-02 | 范甬挺 | Protection pad with safety protection performance based on entertainment wind tunnel |
| CN110711349B (en) * | 2019-10-17 | 2021-04-23 | 盐城工业职业技术学院 | Indoor running training machine and using method thereof |
| CN112121353B (en) * | 2020-09-25 | 2021-11-12 | 浙江金拓机电有限公司 | Adaptive treadmill controlled through numerical control and using method thereof |
| CN114669006B (en) * | 2022-01-27 | 2023-03-28 | 浙江飞神车业有限公司 | Treadmill with safeguard function |
| CN114504766B (en) * | 2022-03-04 | 2022-12-16 | 中南大学湘雅医院 | Medical bedside walking machine |
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| CN2312049Y (en) * | 1997-10-13 | 1999-03-31 | 邱富涌 | Movable step of endless band of running exercising apparatus |
| KR20060029509A (en) * | 2004-10-01 | 2006-04-06 | 이광덕 | Running machine |
| CN201453942U (en) * | 2009-06-25 | 2010-05-12 | 黄加琛 | Running plate |
| CN202020840U (en) * | 2011-03-25 | 2011-11-02 | 东庚企业股份有限公司 | Running platform of treadmill |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2312049Y (en) * | 1997-10-13 | 1999-03-31 | 邱富涌 | Movable step of endless band of running exercising apparatus |
| KR20060029509A (en) * | 2004-10-01 | 2006-04-06 | 이광덕 | Running machine |
| CN201453942U (en) * | 2009-06-25 | 2010-05-12 | 黄加琛 | Running plate |
| CN202020840U (en) * | 2011-03-25 | 2011-11-02 | 东庚企业股份有限公司 | Running platform of treadmill |
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| CN107441675A (en) | 2017-12-08 |
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