CN113521652B - Restraint type pedal structure for exercise bicycle - Google Patents
Restraint type pedal structure for exercise bicycle Download PDFInfo
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- CN113521652B CN113521652B CN202110751956.5A CN202110751956A CN113521652B CN 113521652 B CN113521652 B CN 113521652B CN 202110751956 A CN202110751956 A CN 202110751956A CN 113521652 B CN113521652 B CN 113521652B
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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
- A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
- A63B22/0605—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing a circular movement, e.g. ergometers
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- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
The invention discloses a constraint pedal structure for an exercise bicycle, and aims to provide a constraint pedal structure for an exercise bicycle, which is convenient to operate. Including the footboard body, the footboard body is provided with the sleeve pipe of installation footboard axle and two holes of stepping down, the sleeve pipe is arranged in footboard body middle part and two holes of stepping down and is arranged the sleeve pipe both sides respectively, and one of them hole of stepping down is close to the middle part of sheathed tube side and is connected with the installation piece of rectangle, be connected with the locking bracket on the installation piece, a terminal surface and another downthehole wall connection of stepping down of locking bracket, the locking bracket articulates with the one end of stepping down downthehole wall connection has and moves the jam plate, the other end of locking bracket is connected with the locking plate, move and can dismantle between jam plate and the locking plate and be connected with the shoe buckle of being connected bottom the shoes. The invention has the beneficial effects that: the clamping is firm and stable; the operation is simple and convenient.
Description
Technical Field
The invention relates to the technical field of pedals, in particular to a constraint pedal structure for an exercise bicycle.
Background
Exercise bicycles are becoming more and more popular in everyday life, and the pedals are an important component of exercise bicycles. General exercise bicycle pedal is similar bicycle pedal, and the restrictive subassembly to shoes is the bandage, and when using, the installation need bow to tighten the bandage, and the operation is inconvenient, pedals the exercise bicycle at too fast speed simultaneously and causes shoes to drop from the pedal easily, causes the injury of shank or foot.
Disclosure of Invention
The invention provides a constraint pedal structure for an exercise bicycle, which is convenient to operate and aims to overcome the defect of inconvenient operation in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a restraint formula pedal structure for exercise bicycle, includes the footboard body, the footboard body is provided with the sleeve pipe and two holes of stepping down of installation footboard axle, the sleeve pipe is arranged in footboard body middle part and two holes of stepping down and is arranged in the sleeve pipe both sides respectively, and the middle part that one of them hole of stepping down is close to the sheathed tube side is connected with the installation piece of rectangle, be connected with the locking frame on the installation piece, a terminal surface and another downthehole wall connection of stepping down of locking frame, the locking frame articulates with the one end of downthehole wall connection of stepping down has and moves the jam plate, the other end of locking frame is connected with the locking plate, move and to dismantle between jam plate and the locking plate and be connected with the shoe buckle of being connected bottom the shoes.
The middle part of the pedal body is provided with a sleeve for installing the pedal shaft, and two sides of the sleeve are respectively provided with a yielding hole. One side of the sleeve is connected with an installation block, and a lock frame is connected above the installation block. One end of the lock frame is connected with the inner wall of one of the abdicating holes, so that the function of reinforcing and fixing the lock frame is achieved. The lock frame is articulated with the one end of stepping down jogged joint to have and moves the jam plate, and the jam plate is connected to the lock frame other end, and the jam plate is arranged in lock frame top. The shoe buckle is arranged between the fixed locking plate and the movable locking plate, the shoe buckle can be detachably connected between the fixed locking plate and the movable locking plate, and the shoe buckle can be fixedly connected to the bottom of the shoe. The movable lock catch can rotate around the lock frame, when the exercise bicycle is needed, the shoe catch at the bottom of the shoe is only needed to be clamped between the movable lock plate and the fixed lock plate, the connection between the shoe and the pedal body can be completed, and the operation is convenient.
As preferred, the shape of lock frame is T shape, the upper surface middle part of lock frame is provided with the spacing groove, the one end of lock frame is provided with lets a mouthful, the other end tip of lock frame is provided with the draw-in groove of vertical direction, it is provided with the connecting rod in the mouth to let, the both ends of connecting rod cup joint with the mouth both sides wall of stepping down respectively, the connecting rod is articulated with the movable locking plate. The limiting groove arranged in the middle of the lock frame is convenient for connecting the locking plates and plays a limiting role; let the position mouth provide the pivoted space that moves the jam plate, guarantee to move the jam plate and can realize rotating, be convenient for the spacing joint of shoe buckle and moving the jam plate.
Preferably, the two side faces of the lower end of the movable locking plate are provided with connecting plates, the connecting plates are provided with connecting holes, the connecting holes are sleeved with connecting rods, a clamping plate is arranged at the upper end of the movable locking plate, the clamping plate is V-shaped, an opening of the clamping plate faces the connecting rods, a first abdicating notch is arranged in the middle of the clamping plate, and the first abdicating notch is matched with the shoe buckle. Two connecting plates arranged at the lower end of the movable locking plate are perpendicular to the movable locking plate, and connecting holes formed in the connecting plates are sleeved with the connecting rods to realize the function of hinge rotation; the clamping plate is V-shaped, the opening of the clamping plate faces the connecting rod, namely the clamping plate faces downwards, and the clamping plate plays a role in limiting the displacement of the shoe buckle; the middle position of the clamping plate is provided with a position-yielding notch which is convenient for the shoe buckle to be clamped in, is easy to clamp and is convenient to operate.
Preferably, the side face of the lock frame connected with the abdicating hole is sleeved with a connecting bolt, the end part of the connecting bolt is connected with a spring pulling plate, the movable lock plate and the spring pulling plate are respectively arranged on two sides of the connecting rod, and the spring pulling plate is close to one side of the sleeve. The connecting bolt plays a role in fixing the spring pulling plate and can adjust the compression degree of the spring.
Preferably, the connecting rod is sleeved with a V-shaped spring, and two ends of the V-shaped spring are respectively connected with the movable lock plate and the spring pull plate. The V-shaped spring plays a role in supporting the movable locking plate and the spring pulling plate, and simultaneously the movable locking plate can rebound after rotation, so that the clamping effectiveness and stability are ensured.
As preferred, the shape of the locking plate is long strip, the middle part of the locking plate is embedded into the limiting groove, the two sides of the locking plate are provided with supporting plates, the supporting plates are matched with the shoe buckles, one end of the locking plate is arranged below the clamping plate, the other end of the locking plate is provided with a vertical plate, the vertical plate is arranged in the clamping groove, the top of the vertical plate is connected with a fixed plate, the shape of the fixed plate is U-shaped, the bottom surface of the fixed plate is provided with a yielding notch II, the opening end of the yielding notch II faces the yielding notch I, and the yielding notch II is matched with the shoe buckle. The locking plate is embedded into the limiting groove, so that the connection is stable when being fixed; the arrangement of the supporting plate can ensure the stability of the shoe buckle when being connected with the locking plate; the vertical plate arranged on the locking plate is embedded into the clamping groove, so that the installation stability of the locking plate is ensured, and meanwhile, the stable angle of the connected fixed plate is ensured; the fixing plate is U-shaped, so that the reliability of connection with the shoe buckle is ensured; the arrangement of the abdicating notch II can facilitate the clamping of the shoe buckle, and the clamping is easy and the operation is convenient.
Preferably, the shoe buckle is cross-shaped, the shoe buckle comprises a fixing ring, two opposite side surfaces of the fixing ring are connected with a first clamping block and a second clamping block respectively, the length of the first clamping block is larger than that of the second clamping block, the first clamping block is matched with the movable locking plate, and the second clamping block is matched with the fixed locking plate. After the shoe buckle is clamped between the precession locking plate and the fixed locking plate, the first clamping block is arranged below the clamping plate arranged on the movable locking plate, and the second clamping block is arranged below the fixed plate arranged on the fixed locking plate, so that the shoe buckle is fixed, and the operation is simple.
Preferably, the upper surface of the fixing ring is provided with a plurality of lugs which are uniformly distributed around the fixing ring. The arrangement of the convex block provides enough friction force, so that the shoe buckle is prevented from displacing with the bottom of the shoe when entering between the movable locking plate and the fixed locking plate, and the operation is simple and reliable.
Preferably, the first clamping block comprises a first transition block and a first support block, the first transition block is a rectangular block, a first transition inclined plane is arranged on one end face of the first transition block, the first support block is T-shaped, the first transition block is arranged below the first support block and fixedly connected with the first support block, the first transition inclined plane faces the movable locking plate, the inclined plane faces downwards, and the first support block corresponds to the first abdicating notch. The first transition vamp provides a guiding function when the shoe buckle is clamped in the precession locking plate, so that the first transition vamp is conveniently clamped in the precession locking plate; the supporting block is T-shaped, and after clamping is completed, the supporting block I is arranged in the abdicating notch I, so that a stable clamping effect is guaranteed.
Preferably, the second fixture block comprises a second transition block and a second support block, the second transition block is a triangular block, a second transition inclined plane is arranged at the end of the second transition block, the second support block is T-shaped, the second transition block is arranged below the second support block and is fixedly connected with the second support block, the second transition inclined plane faces the locking plate and faces downwards, and the second support block corresponds to the second abdicating notch. The second transition inclined plane provides a guiding function when the shoe buckle is clamped into the fixed locking plate, so that the shoe buckle can be conveniently clamped into the precession locking plate; the second supporting block is T-shaped, and after clamping is completed, the second supporting block is arranged in the second abdicating notch, so that a stable clamping effect is guaranteed.
The invention has the beneficial effects that: the V-shaped spring ensures the clamping effectiveness and stability of the movable locking plate to the shoe buckle, and the clamping is firm; the first abdicating notch and the second abdicating notch which are respectively arranged on the movable locking plate and the fixed locking plate can facilitate the clamping connection of the shoe buckle, and the operation is convenient; the supporting plate arranged on the locking plate plays a role of supporting the shoe buckle, so that the shoe buckle is stable when being contacted with the locking plate; the first transition inclined plane and the second transition inclined plane are respectively arranged on the first clamping block and the second clamping block which are arranged on the shoe buckle, so that a guiding effect can be provided and clamping is convenient during clamping, and the operation is simple and convenient.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the assembly of the lock frame, the movable lock plate and the fixed lock plate of the present invention;
FIG. 3 is a partial schematic view of the lock frame of the present invention;
FIG. 4 is a perspective view of the dynamic lock plate of the present invention;
FIG. 5 is a perspective view of the buckle of the present invention;
fig. 6 is an enlarged view at a in fig. 1.
In the drawings, there is shown in the drawings,
1. the pedal comprises a pedal body, 2 parts of a sleeve, 3 parts of an abdicating hole, 4 parts of a mounting block, 5 parts of a locking frame, 6 parts of a movable locking plate, 7 parts of a fixed locking plate, 8 parts of a shoe buckle, 50 parts of a limiting groove, 51 parts of an abdicating opening, 52 parts of a clamping groove, 53 parts of a connecting rod, 54 parts of a connecting bolt, 55 parts of a spring pulling plate, 56. V-shaped springs, 60 connecting plates, 61 parts of a connecting hole, 62 parts of a clamping plate, 70 parts of a supporting plate, 71 parts of a vertical plate, 72 parts of a fixing plate, 73 parts of an abdicating notch II, 80 parts of a fixing ring, 81 parts of a first clamping block, 82 parts of a second clamping block, 83 parts of a bump, 810 parts of a first transition block, 811 parts of a first supporting block, 812 parts of a transition inclined surface, 820 parts of a second transition block, 821 parts of a second supporting block, 822 parts of a transition inclined surface II.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 2, the lock frame 5 has a T-shape. The middle part of the upper surface of the lock frame 5 is provided with a limit groove 50. One end of the lock frame 5 is provided with a relief port 51. The other end of the lock frame 5 is provided with a vertical slot 52. A connecting rod 53 is arranged in the position-giving opening 51. Two ends of the connecting rod 53 are respectively sleeved with two side walls of the abdicating opening 51. The connecting rod 53 is hinged with the movable locking plate 6.
As shown in fig. 2, 3 and 4, the two side surfaces of the lower end of the movable locking plate 6 are provided with connecting plates 60. The connection plate 60 is provided with a connection hole 61. The connecting hole 61 is sleeved with the connecting rod 53. The upper end of the movable locking plate 6 is connected with a clamping plate 62. The catch plate 62 is V-shaped. The opening of the catch plate 62 faces the connecting rod 53. The middle of the clamping plate 62 is provided with a first abdicating notch 63. The abdication gap I63 is matched with the shoe buckle 8. The side surface of the lock frame 5 connected with the abdicating hole 3 is sleeved with a connecting bolt 54. The end of the connecting bolt 54 is connected with a spring pulling plate 55. The movable locking plate 6 and the spring pulling plate 55 are respectively arranged at two sides of the connecting rod 53. The spring pull plate 55 is close to one side of the sleeve 2. The connecting rod 53 is sleeved with a V-shaped spring 56. The two ends of the V-shaped spring 56 are respectively connected with the movable lock plate 6 and the spring pull plate 55. The locking plate 7 is shaped like a long strip. The middle part of the locking plate 7 is embedded in the limit groove 50. Supporting plates 70 are arranged on both sides of the locking plate 7. The supporting plate 70 is matched with the shoe buckle 8. One end of the locking plate 7 is arranged below the clamping plate 62. The other end of the locking plate 7 is provided with a vertical plate 71. The vertical plate 71 is arranged in the clamping groove 52. The top of the vertical plate is connected with a fixing plate 72. The fixing plate 72 is U-shaped. The bottom surface of the fixing plate 72 is provided with a second abdicating notch 73. The open end of the abdicating notch two 73 faces the abdicating notch one 63. The abdication gap II 73 is matched with the shoe buckle 8.
As shown in fig. 5, the shoe buckle 8 is in the shape of a cross. The shoe buckle 8 comprises a fixing ring 80. Two opposite side surfaces of the fixing ring 80 are connected with a first fixture block 81 and a second fixture block 82 respectively. The length of the first clamping block 81 is larger than that of the second clamping block 82. The first clamping block 81 is matched with the movable locking plate 6. The second latch 82 matches with the locking plate 7. The upper surface of the fixing ring 80 is provided with a plurality of projections 83, and the projections 83 are evenly arranged around the fixing ring 80.
As shown in fig. 5 and 6, the first latching block 81 includes a first transition block 810 and a first supporting block 811. Transition block one 810 is a rectangular block. The end face of the first transition block 810 is provided with a first transition inclined surface 812. The first support block 811 is T-shaped. The first transition block 810 is arranged below the first support block 811 and is fixedly connected with the first support block. Transition ramp one 812 faces the moving lock plate 6 and the ramp direction faces downward. The first supporting block 811 corresponds to the first abdicating notch 63. The second latch 82 includes a second transition block 820 and a second support block 821. The second transition block 820 is a triangular block. The end of the second transition block 820 is provided with a second transition inclined plane 822. The second support block 821 is T-shaped. The second transition block 820 is arranged below the second support block 821 and is fixedly connected with the second support block. The second transition bevel 822 faces the locking plate 7 and the bevel is directed downwards. The second support block 821 corresponds to the second abdicating notch 73.
The working principle of the invention is as follows: as shown in fig. 1-6, a sleeve 2 is arranged at the position of the middle part of the pedal body 1 where the pedal shaft is installed, abdicating holes 3 are arranged at two sides of the sleeve 2, one side of the sleeve 2 is connected with an installation block 4, and a lock frame 5 is connected on the installation block 4. One end of the lock frame 5 is hinged with a movable lock plate 6, and the other end of the lock frame 5 is connected with a fixed lock plate 7. The shoe buckle 8 can be fixedly installed at the bottom of a shoe, the shoe buckle 8 can be detachably connected between the movable locking plate 6 and the fixed locking plate 7, the movable locking plate 6 is connected with the V-shaped spring 56, the movable locking plate 6 can be restored to the original position after rotation, and clamping and fastening are stable. When the exercise bicycle is used, the shoe buckle 8 below the shoe is arranged above the movable locking plate 6 and the fixed locking plate 7, the shoe is pressed downwards, the shoe buckle 8 is clamped in the movable locking plate 6 and the fixed locking plate 7, the clamping plate 62 arranged on the movable locking plate 6 is contacted with the first clamping block 81, the fixed plate 72 arranged on the fixed locking plate 7 is contacted with the second clamping block 82, the shoe buckle 8 is clamped, and the connection of the shoe and the exercise bicycle pedal is completed. After the shoe buckle is used, the shoe moves forwards to push the shoe buckle forwards to move the movable locking plate 6, the heel is lifted, the shoe buckle 8 is driven to be separated from the fixed locking plate 7, and finally the shoe buckle 8 is separated from the space between the movable locking plate 6 and the fixed locking plate 7. In the process, the installation and the disassembly are simple, the clamping is firm, and the operation is convenient.
Claims (6)
1. A restraint type pedal structure for a body building vehicle is characterized by comprising a pedal body (1), wherein the pedal body (1) is provided with a sleeve (2) for installing a pedal shaft and two abdicating holes (3), the sleeve (2) is arranged in the middle of the pedal body (1), the two abdicating holes (3) are respectively arranged on two sides of the sleeve (2), the middle of one abdicating hole (3) close to the side surface of the sleeve (2) is connected with a rectangular installing block (4), the installing block (4) is connected with a lock frame (5), one end surface of the lock frame (5) is connected with the inner wall of the other abdicating hole (3), one end of the lock frame (5) connected with the inner wall of the abdicating hole (3) is hinged with a movable lock plate (6), the other end of the lock frame (5) is connected with a fixed lock plate (7), a shoe buckle (8) connected with the bottom of a shoe is detachably connected between the movable lock plate (6) and the fixed lock plate (7), the lock is characterized in that the lock frame (5) is T-shaped, a limiting groove (50) is formed in the middle of the upper surface of the lock frame (5), a yielding port (51) is formed in one end of the lock frame (5), a clamping groove (52) in the vertical direction is formed in the end portion of the other end of the lock frame (5), a connecting rod (53) is arranged in the yielding port (51), two ends of the connecting rod (53) are respectively sleeved with two side walls of the yielding port (51), the connecting rod (53) is hinged with a movable locking plate (6), connecting plates (60) are arranged on two side faces of the lower end of the movable locking plate (6), connecting holes (61) are formed in the connecting plates (60), the connecting holes (61) are sleeved with the connecting rod (53), a clamping plate (62) is connected to the upper end of the movable locking plate (6), the clamping plate (62) is V-shaped, and the opening of the clamping plate (62) faces the connecting rod (53), the middle of the clamping plate (62) is provided with a yielding notch I (63), the yielding notch I (63) is matched with the shoe buckle (8), the side face of the lock frame (5) connected with the yielding hole (3) is sleeved with a connecting bolt (54), the end part of the connecting bolt (54) is connected with a spring pulling plate (55), the movable locking plate (6) and the spring pulling plate (55) are respectively arranged at two sides of the connecting rod (53), the spring pulling plate (55) is close to one side of the sleeve (2), the fixed locking plate (7) is in a strip shape, the middle part of the fixed locking plate (7) is embedded into the limiting groove (50), two sides of the fixed locking plate (7) are respectively provided with a supporting plate (70), the supporting plate (70) is matched with the shoe buckle (8), one end of the fixed locking plate (7) is arranged below the clamping plate (62), the other end of the fixed locking plate (7) is provided with a vertical plate (71), and the vertical plate (71) is arranged in the clamping groove (52), the top of the vertical plate (71) is connected with a fixing plate (72), the fixing plate (72) is U-shaped, a second abdicating notch (73) is arranged on the bottom surface of the fixing plate (72), the opening end of the second abdicating notch (73) faces the first abdicating notch (63), and the second abdicating notch (73) is matched with the shoe buckle (8).
2. The structure of the bound pedal for exercise bicycle as claimed in claim 1, wherein the connecting rod (53) is sleeved with a V-shaped spring (56), and two ends of the V-shaped spring (56) are respectively connected with the movable locking plate (6) and the spring pulling plate (55).
3. The structure of the bound pedal for exercise bicycle as claimed in claim 1, wherein the shoe buckle (8) is cross-shaped, the shoe buckle (8) comprises a fixing ring (80), two opposite side surfaces of the fixing ring (80) are connected with a first clamping block (81) and a second clamping block (82), respectively, the length of the first clamping block (81) is greater than that of the second clamping block (82), the first clamping block (81) is matched with the movable locking plate (6), and the second clamping block (82) is matched with the fixed locking plate (7).
4. The structure of a tethered pedal for an exercise bicycle as in claim 3, wherein the top surface of the retainer ring (80) has a plurality of projections (83), the plurality of projections (83) being evenly disposed around the retainer ring (80).
5. The structure of the bound pedal for exercise bicycle as claimed in claim 3, wherein said first fastening block (81) comprises a first transition block (810) and a first supporting block (811), said first transition block (810) is a rectangular block, said first transition block (810) has a first transition inclined surface (812) on the end surface, said first supporting block (811) is T-shaped, said first transition block (810) is disposed under and fixedly connected to said first supporting block (811), said first transition inclined surface (812) faces the movable locking plate (6) and the inclined surface faces downward, and said first supporting block (811) corresponds to the first abdicating notch (63).
6. The restraining pedal structure for the exercise bicycle as claimed in claim 3, wherein the second clamping block (82) comprises a second transition block (820) and a second support block (821), the second transition block (820) is a triangular block, a second transition inclined surface (822) is arranged at the end of the second transition block (820), the second support block (821) is T-shaped, the second transition block (820) is arranged below the second support block (821) and fixedly connected with the second support block, the second transition inclined surface (822) faces the locking plate (7) and faces the inclined surface downwards, and the second support block (821) corresponds to the abdicating notch two (73).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110751956.5A CN113521652B (en) | 2021-07-02 | 2021-07-02 | Restraint type pedal structure for exercise bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110751956.5A CN113521652B (en) | 2021-07-02 | 2021-07-02 | Restraint type pedal structure for exercise bicycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113521652A CN113521652A (en) | 2021-10-22 |
| CN113521652B true CN113521652B (en) | 2022-09-20 |
Family
ID=78126616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110751956.5A Active CN113521652B (en) | 2021-07-02 | 2021-07-02 | Restraint type pedal structure for exercise bicycle |
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| Country | Link |
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| CN (1) | CN113521652B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010053759A (en) * | 1999-12-01 | 2001-07-02 | 윤영재 | Pedal of bicycle having instep cover |
| TWM530281U (en) * | 2016-07-12 | 2016-10-11 | Jin-Long Xie | Pedal of bicycle or exercise bike |
| CN208574168U (en) * | 2018-04-03 | 2019-03-05 | 湖南文理学院 | A spinning bike for fitness personnel |
| CN212548134U (en) * | 2020-06-17 | 2021-02-19 | 孔德红 | Adjustable foot rehabilitation device for postoperative care |
| CN215387334U (en) * | 2021-07-02 | 2022-01-04 | 杭州勇华车业有限公司 | Restraint type pedal for exercise bicycle |
-
2021
- 2021-07-02 CN CN202110751956.5A patent/CN113521652B/en active Active
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| CN113521652A (en) | 2021-10-22 |
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