CN209634549U - It is capable of the perambulator of automatic folding after a kind of unlock - Google Patents
It is capable of the perambulator of automatic folding after a kind of unlock Download PDFInfo
- Publication number
- CN209634549U CN209634549U CN201920160682.0U CN201920160682U CN209634549U CN 209634549 U CN209634549 U CN 209634549U CN 201920160682 U CN201920160682 U CN 201920160682U CN 209634549 U CN209634549 U CN 209634549U
- Authority
- CN
- China
- Prior art keywords
- perambulator
- back leg
- foreleg
- automatic folding
- sliding part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 210000001364 upper extremity Anatomy 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
- B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
- B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
- B62B7/068—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable by sliding a bushing along a rod, e.g. like folding means of an umbrella
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
- B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
- B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
- B62B7/062—Coupling unit between front wheels, rear wheels and handle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
- B62B2205/003—Hand-propelled vehicles or sledges being foldable or dismountable when not in use with actuation mechanisms which drive the folding or unfolding operation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)
Abstract
The utility model discloses the perambulator for capableing of automatic folding after a kind of unlock, back leg (2) and foreleg (1) are rotatablely connected；Front strut (3) lower end and back leg (2) upper end are rotatablely connected；Sliding part (4) is connected on back leg (2) and can slide up and down along back leg (2)；Front tension bar (5) one end and foreleg (1) are rotatablely connected, and the other end and sliding part (4) are rotatablely connected；Back stay (6) one end and front strut (3) are rotatablely connected, and the other end and sliding part (4) are rotatablely connected；Also, the elastic component (7) that can make perambulator automatic folding is equipped with after the locking device unlock of perambulator between the foreleg (1) and back leg (2) or between front strut (3) and back leg (2) or between front tension bar (5) and back stay (6).The utility model structure is simple, being capable of automatic folding after unlock.
Description
[technical field]
The utility model relates to be capable of the perambulator of automatic folding after a kind of unlock.
[background technique]
Perambulator is product indispensable in Carriage for baby developmental process.Current perambulator can generally fold, with
It is easy to carry.Perambulator currently on the market generally all first operates locking device when folding and unlocks locking device, then
Act vehicle frame connecting rod by pressing or racking, so that folding of baby.But such folding operation compares
Trouble, however it remains improved space.
Therefore, the utility model comes into being.
[utility model content]
The utility model aim is to overcome the deficiencies in the prior art, and it is simple to provide a kind of structure, can be automatic after unlock
The perambulator of folding.
The utility model is achieved through the following technical solutions:
It is capable of the perambulator of automatic folding after a kind of unlock, it is characterised in that: include:
Foreleg 1 is connected with front-wheel 1a on the foreleg 1；
Back leg 2 is connected with rear-wheel 2a on the back leg 2, and the back leg 2 and foreleg 1 are rotatablely connected；
Front strut 3,3 lower end of front strut and 2 upper end of back leg are rotatablely connected；
Sliding part 4, the sliding part 4 are connected on back leg 2 and can slide along about 2 back leg；
Front tension bar 5, described 5 one end of front tension bar and foreleg 1 are rotatablely connected, and the other end and sliding part 4 are rotatablely connected；
6 one end of back stay described in back stay 6 and front strut 3 are rotatablely connected, and the other end and sliding part 4 are rotatablely connected；
Also, between the foreleg 1 and back leg 2 or between front strut 3 and back leg 2 or between front tension bar 5 and back stay 6
Equipped with the elastic component 7 that can make perambulator automatic folding after the unlock of the locking device of perambulator.
It is capable of the perambulator of automatic folding after unlock as described above, it is characterised in that: the foreleg 1 is equipped with laterally
Seat support 8,8 front end of seat support is rotatably connected to leg pedal 9, the front tension bar 5, seat support
8 and 9 three of leg pedal rotate coaxially connection.
Be capable of the perambulator of automatic folding after unlock as described above, it is characterised in that: the elastic component 7 be tension spring or
Person's elastic band.
It is capable of the perambulator of automatic folding after unlock as described above, it is characterised in that: the back leg 2 includes T shape
Upper bracket 21, the upper bracket 21 has first connecting portion 21a, second connecting portion 21b and third interconnecting piece 21c, described
Foreleg 1 and first connecting portion 21a are rotatablely connected, and front strut 3 and second connecting portion 21b are rotatablely connected, the third interconnecting piece
It is connected with lower bracket 22 on 21c, the lower bracket 22 includes being spaced apart from each other and two parallel lower fulcrum bars 221, described in two
221 upper end of lower fulcrum bar be connected with upper bracket 21 by top connection 222,221 lower end of lower fulcrum bar described in two passes through lower contact
223 are connected with rear-wheel 2a, and the sliding part 4 is slidably connected with lower bracket 22.
It is capable of the perambulator of automatic folding after unlock as described above, it is characterised in that: the sliding part 4 is equipped with two
A through-hole is slidably connected with lower fulcrum bar 221 described in two respectively.
It is capable of the perambulator of automatic folding after unlock as described above, it is characterised in that: the sliding part 4 includes covering
Sliding block 41 on lower fulcrum bar 221 described in two, the sliding block 41 are equipped with the bending that simultaneously arc-shaped bend is integrally formed with it
Bar 42, the front tension bar 5 and back stay 6 are connected to the both ends of bent stick 42.
It is capable of the perambulator of automatic folding after unlock as described above, it is characterised in that: 2 upper end of back leg is equipped with suitable
The armrest seat 10 that upwardly extends of back leg 2, handrail 11 before being removably connected on the armrest seat 10.
It is capable of the perambulator of automatic folding after unlock as described above, it is characterised in that: also rotate on the front strut 3
It is connected with handspike 12.
Be capable of the perambulator of automatic folding after unlock as described above, it is characterised in that: the foreleg 1 and back leg 2 it
Between be mounted with pouch 13, the elastic component 7 is tension spring, and the tension spring is located in pouch 13.
It is capable of the perambulator of automatic folding after unlock as described above, it is characterised in that: the locking device setting exists
Between sliding part 4 and back leg 2.
Compared with prior art, the utility model has the following advantages:
1, between the foreleg and back leg of the utility model perhaps between front strut and back leg or front tension bar and back stay
Between be equipped with elastic component, when perambulator is in unfolded state, which is in the state of elongation strain, so working as perambulator
Locking device unlock after, elastic component reply, thus pull connect with elastic component two components relative rotation so that
Sliding part is mutually drawn close and is folded along back leg glide downwards, foreleg, back leg, front tension bar, back stay and front strut.Therefore, in baby
When youngster's vehicle folds, as long as soon as unlocking motion is completed, perambulator energy automatic folding not need pushing manually or pressing perambulator
The components such as front strut, operate very convenient quick.
2, the back leg of the utility model includes T shape upper bracket, and foreleg and front strut are rotatably connected on T shape upper bracket, T
Lower bracket is connected on shape upper bracket, lower bracket includes two lower fulcrum bars, and sliding part includes that there are two the sliding block of through-hole, sliding blocks for tool
It is covered on corresponding lower fulcrum bar by through-hole, so sliding part and lower bracket constitute the sliding structure of double guide rails, so that sliding part
Slide action up and down it is very smooth so that perambulator folding very it is smooth flexibly.
3, the back leg upper end of the utility model is equipped with the armrest seat upwardly extended along back leg, is detachably connected on armrest seat
There is preceding handrail.Therefore, preceding handrail is upwardly extended along the extending direction of back leg, is grasped convenient for infant, it is ensured that safety, Er Qie
When folding of baby, user can easily haul the perambulator walking of folding by preceding handrail, just as hauling luggage case,
It carries more convenient.
4, the utility model structure is simple, so that the folding of perambulator is more convenient, it is more labor-saving, it is suitble to promote and apply.
[Detailed description of the invention]
Fig. 1 is 1 perspective view of the utility model embodiment；
Fig. 2 is 1 unfolded state side view of the utility model embodiment；
Fig. 3 is one of the side view in 1 folding process of the utility model embodiment；
Fig. 4 is two of the side view in 1 folding process of the utility model embodiment；
Fig. 5 is three of the side view in 1 folding process of the utility model embodiment；
Fig. 6 is 1 folded state side view of the utility model embodiment；
Fig. 7 is the perspective view in 1 folding process of the utility model embodiment；
Fig. 8 is the side view of the utility model embodiment 2；
Fig. 9 is the side view of the utility model embodiment 3.
[specific embodiment]
The utility model is further described with reference to the accompanying drawing:
Embodiment 1:
As shown in Figures 1 to 7, the perambulator of automatic folding is capable of after a kind of unlock, comprising:
Foreleg 1 is connected with front-wheel 1a on the foreleg 1；
Back leg 2 is connected with rear-wheel 2a on the back leg 2, and the back leg 2 and foreleg 1 are rotatablely connected；
Front strut 3,3 lower end of front strut and 2 upper end of back leg are rotatablely connected；
Sliding part 4, the sliding part 4 are connected on back leg 2 and can slide along about 2 back leg；
Front tension bar 5, described 5 one end of front tension bar and foreleg 1 are rotatablely connected, and the other end and sliding part 4 are rotatablely connected；
6 one end of back stay described in back stay 6 and front strut 3 are rotatablely connected, and the other end and sliding part 4 are rotatablely connected；
Also, being equipped between the foreleg 1 and back leg 2 can make perambulator automatic after the locking device unlock of perambulator
The elastic component 7 of folding.
As shown in Figures 1 to 7, elastic component 7 is equipped between foreleg 1 and back leg 2, it, should when perambulator is in unfolded state
Elastic component 7 is in the state of elongation strain, so elastic component 7 is replied, thus to preceding after the locking device unlock of perambulator
The lower end of leg 1 and back leg 2 applies pulling force, so that foreleg 1 and back leg 2 relatively rotate, so that front tension bar 5 pushes sliding part 4
Pull front strut 3 with respect to the rotation of back leg 2 along 2 glide downwards of back leg, then by back stay 6, so that foreleg 1, back leg 2, preceding
Pull rod 5, back stay 6 and front strut 3 are mutually drawn close and are folded.Therefore, in folding of baby, as long as unlocking motion one is completed,
Perambulator energy automatic folding, not need to push manually or the equal components of the front strut 3 of pressing perambulator, operation are very convenient
Fast.In the present embodiment, the locking device is arranged between sliding part 4 and back leg 2, and locking device once unlocks, bullet
Property part 7 driving force just is applied to the relative rotation of foreleg 1 and back leg 2 so that each component successive relay trip of perambulator and complete
Automatic folding, folding process are very easy.Certainly, the locking device also can be set between foreleg 1 and back leg 2,
Or between front strut 3 and back leg 2, as long as locking device is arranged between two components with relative rotation relationship.
In the present embodiment, locking device is arranged between sliding part 4 and back leg 2, it can be ensured that and locking device simply easily assembles, and
So that perambulator locks more stable in unfolded state.
As shown in Figure 1, the foreleg 1 is equipped with lateral seat support 8,8 front end of seat support turns
Dynamic to be connected with leg pedal 9, the front tension bar 5, seat support 8 and 9 three of leg pedal rotate coaxially connection.Seat support
8 take for infant, and leg pedal 9 can then support the both legs of infant, and leg pedal 9 can be with relative thereto supporting element 8
Rotation, convenient for for freely adjusting.When leg pedal 9 is turned to it is concordant with seat support 8 when so that seat support 8 is prolonged
Long, infant can also lie in sleep in perambulator.Front tension bar 5, seat support 8 and 9 three of leg pedal rotate coaxially connection,
So that stroller configuration is simple and compact, fold flexibly.
As shown in figure 3, the elastic component 7 is elastic band, elastic band is flexible-belt, elastic in folding of baby to take out of
Existing flexible bending is avoided the occurrence of with other component interference and collisions, and low in cost.Certainly, the elastic component 7 may be
The tension spring between foreleg 1 and back leg 2 and being located in pouch 13 is set, and after perambulator unlock, tension spring pulls foreleg 1
It is rotated automatically with back leg 2, thus realize folding, and tension spring is arranged in pouch 13, it, can be to tension spring in perambulator walking
Play protection.
As shown in Figures 1 to 7, the back leg 2 includes the upper bracket 21 of T shape, and the upper bracket 21 has first to connect
Socket part 21a, second connecting portion 21b and third interconnecting piece 21c, the foreleg 1 and first connecting portion 21a are rotatablely connected, preceding support
Bar 3 and second connecting portion 21b are rotatablely connected, and are connected with lower bracket 22, the lower bracket on the third interconnecting piece 21c
22 include being spaced apart from each other and two parallel lower fulcrum bars 221,221 upper end of lower fulcrum bar described in two by top connection 222 with it is upper
Bracket 21 is connected, and 221 lower end of lower fulcrum bar described in two is connected by lower contact 223 with rear-wheel 2a, the sliding part 4 and
Lower bracket 22 is slidably connected.Foreleg 1 and front strut 3 are connected on the upper bracket 21 of T shape, when foreleg 1 and front strut 3 are equal
When drawing close to back leg 2, back leg 2 is located at middle, and the perambulator that can be avoided folding connects in back leg 2, foreleg 1 and front strut 3
Position is formed compared with point, is laid flat convenient for perambulator.
As shown in Fig. 2, set on the sliding part 4 there are two through-hole (not shown), respectively with described in two under
Strut 221 is slidably connected.Sliding part 4 is covered on corresponding lower fulcrum bar 221 by through-hole, so sliding part 4 and lower bracket
22 constitute the sliding structure of double guide rails, so that the slide action up and down of sliding part 4 is very smooth, so that the receipts of perambulator
Folding is very smooth flexible.
As shown in Fig. 2, the sliding part 4 includes the sliding block 41 covered on the lower fulcrum bar 221 described in two, the cunning
Block 41 is equipped with the bent stick 42 that simultaneously arc-shaped bend is integrally formed with it, and the front tension bar 5 and back stay 6 are connected to
The both ends of bent stick 42.Therefore, very flexibly smooth when folding of baby carriage.
As depicted in figs. 1 and 2,2 upper end of back leg is equipped with the armrest seat 10 upwardly extended along back leg 2, described
Handrail 11 before being removably connected on armrest seat 10.Therefore, preceding handrail 11 is upwardly extended along the extending direction of back leg 2, is convenient for
Infant grasps, it is ensured that safety, and in folding of baby, user can easily haul the baby of folding by preceding handrail 11
Youngster garage is walked, and just as hauling luggage case, carries more convenient.
As depicted in figs. 1 and 2, handspike 12 is also rotatably connected on the front strut 3.Handspike 12 makes front strut
3 length upwardly extends, convenient for for push perambulator walking.In folding of baby carriage, handspike 12 and front strut are first unlocked
3, the relatively preceding support 3 of handspike 12 is turned folding, the locking device between sliding part 4 and back leg 2 is then unlocked.Certainly,
Handspike 12 is also possible to be slidably connected in front strut 3.
Embodiment 2:
As shown in figure 8, embodiment 2 the difference from embodiment 1 is that:
The elastic component 7 is arranged between front strut 3 and back leg 2.When locking device once unlocking, elastic component 7 is just right
Front strut 3 and back leg 2 apply pulling force, so that front strut 3 and back leg 2 relatively rotate, so that back stay 6 pushes sliding part 4
Foreleg 1 is pulled to rotate relative to back leg 2 along 2 glide downwards of back leg, then by front tension bar 5, so that foreleg 1, back leg 2, preceding drawing
Bar 5, back stay 6 and front strut 3 are mutually drawn close and are folded.Therefore, in folding of baby, as long as unlocking motion one is completed, baby
Youngster's vehicle can automatic folding.
Embodiment 3:
As shown in figure 9, embodiment 3 the difference from embodiment 1 is that:
The elastic component 7 is arranged between front tension bar 5 and back stay 6.After locking device unlock, elastic component 7 is pulled
Front tension bar 5 and back stay 6 relatively rotate, and then 4 glide downwards of sliding part, foreleg 1 and front strut 3 are drawn close to back leg 2, realize
The automatic folding of perambulator.
Claims (10)
1. capableing of the perambulator of automatic folding after a kind of unlock, it is characterised in that: include:
Foreleg (1) is connected with front-wheel (1a) on the foreleg (1)；
Back leg (2) is connected with rear-wheel (2a) on the back leg (2), and the back leg (2) and foreleg (1) are rotatablely connected；
Front strut (3), the front strut (3) lower end and back leg (2) upper end are rotatablely connected；
Sliding part (4), the sliding part (4) are connected on back leg (2) and can slide up and down along back leg (2)；
Front tension bar (5), the front tension bar (5) one end and foreleg (1) are rotatablely connected, and the other end and sliding part (4) are rotatablely connected；
Back stay (6) one end described in back stay (6) and front strut (3) are rotatablely connected, and the other end and sliding part (4) rotation connect
It connects；
Also, between the foreleg (1) and back leg (2) or between front strut (3) and back leg (2) or front tension bar (5) and post-tensioning
The elastic component (7) that can make perambulator automatic folding is equipped with after the locking device unlock of perambulator between bar (6).
2. capableing of the perambulator of automatic folding after unlock according to claim 1, it is characterised in that: the foreleg (1)
It is equipped with lateral seat support (8), the seat support (8) front end is rotatably connected to leg pedal (9), before described
Pull rod (5), seat support (8) and leg pedal (9) three rotate coaxially connection.
3. capableing of the perambulator of automatic folding after unlock according to claim 1, it is characterised in that: the elastic component
It (7) is tension spring or elastic band.
4. capableing of the perambulator of automatic folding after unlock according to claim 1, it is characterised in that: the back leg (2)
Upper bracket (21) including T shape, the upper bracket (21) have first connecting portion (21a), second connecting portion (21b) and third
Interconnecting piece (21c), the foreleg (1) and first connecting portion (21a) are rotatablely connected, front strut (3) and second connecting portion (21b)
It is rotatablely connected, is connected with lower bracket (22) on the third interconnecting piece (21c), the lower bracket (22) includes being spaced apart from each other
And two parallel lower fulcrum bars (221), lower fulcrum bar (221) upper end described in two pass through top connection (222) and upper bracket (21)
Be connected, lower fulcrum bar (221) lower end described in two is connected by lower contact (223) with rear-wheel (2a), the sliding part (4) and
Lower bracket (22) is slidably connected.
5. capableing of the perambulator of automatic folding after unlock according to claim 4, it is characterised in that: the sliding part
(4) through-hole there are two setting on, is slidably connected with lower fulcrum bar (221) described in two respectively.
6. capableing of the perambulator of automatic folding after unlock according to claim 4, it is characterised in that: the sliding part
It (4) include the sliding block (41) covered on the lower fulcrum bar (221) described in two, the sliding block (41) is equipped with and is integrally formed with it
And the bent stick (42) of arc-shaped bend, the front tension bar (5) and back stay (6) are connected to the both ends of bent stick (42).
7. capableing of the perambulator of automatic folding after unlock according to claim 1, it is characterised in that: the back leg (2)
Upper end is equipped with the armrest seat (10) upwardly extended along back leg (2), and the armrest seat is removably connected with preceding handrail on (10)
(11)。
8. capableing of the perambulator of automatic folding after unlock according to claim 1, it is characterised in that: the front strut
(3) handspike (12) are also rotatably connected on.
9. capableing of the perambulator of automatic folding after unlock according to claim 1, it is characterised in that: the foreleg (1)
It is mounted between back leg (2) pouch (13), the elastic component (7) is tension spring, and the tension spring is located at pouch (13)
It is interior.
10. capableing of the perambulator of automatic folding after unlock according to claim 1, it is characterised in that: the locking dress
It installs between sliding part (4) and back leg (2).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920160682.0U CN209634549U (en) | 2019-01-30 | 2019-01-30 | It is capable of the perambulator of automatic folding after a kind of unlock |
| DE202019103466.1U DE202019103466U1 (en) | 2019-01-30 | 2019-06-21 | After unlocking automatically collapsible stroller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920160682.0U CN209634549U (en) | 2019-01-30 | 2019-01-30 | It is capable of the perambulator of automatic folding after a kind of unlock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209634549U true CN209634549U (en) | 2019-11-15 |
Family
ID=67308540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920160682.0U Active CN209634549U (en) | 2019-01-30 | 2019-01-30 | It is capable of the perambulator of automatic folding after a kind of unlock |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209634549U (en) |
| DE (1) | DE202019103466U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112009549A (en) * | 2020-08-04 | 2020-12-01 | 好孩子儿童用品有限公司 | a children's stroller |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111071331A (en) * | 2020-01-08 | 2020-04-28 | 绍兴上虞日星五金制品有限公司 | Automatic folding and standing-keeping baby stroller |
| CN113442990B (en) * | 2021-08-06 | 2024-11-05 | 山东传奇贝贝儿童用品有限公司 | Folding frame and baby carriage |
-
2019
- 2019-01-30 CN CN201920160682.0U patent/CN209634549U/en active Active
- 2019-06-21 DE DE202019103466.1U patent/DE202019103466U1/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112009549A (en) * | 2020-08-04 | 2020-12-01 | 好孩子儿童用品有限公司 | a children's stroller |
Also Published As
| Publication number | Publication date |
|---|---|
| DE202019103466U1 (en) | 2019-07-01 |
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Effective date of registration: 20240101 Address after: 528400, 2nd Floor, Building 1, No. 11 Gangbao Road, Tongmao Industrial Avenue (West), Baili Village, Xiaolan Town, Zhongshan City, Guangdong Province Patentee after: ZHONGSHAN ZETAI HOUSEHOLD PRODUCTS CO.,LTD. Address before: Jianli No.1 Middle School in Jianli County, Hubei Province Patentee before: Dai Fang |