CN212250126U - Mining pedestrian walking aid - Google Patents
Mining pedestrian walking aid Download PDFInfo
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- CN212250126U CN212250126U CN202021311920.2U CN202021311920U CN212250126U CN 212250126 U CN212250126 U CN 212250126U CN 202021311920 U CN202021311920 U CN 202021311920U CN 212250126 U CN212250126 U CN 212250126U
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Abstract
A walking aid for mining pedestrians relates to the technical field of mining pedestrian equipment, and comprises a track, a transmission steel wire rope and a reciprocating driving device for driving the transmission steel wire rope to reciprocate; the rope body of the transmission steel wire rope longitudinally penetrates through the inside of the rail along the rail and winds back, double ropes with opposite transmission directions are formed in the rail, and each double rope comprises a rope A and a rope B; the mining pedestrian walking aid is characterized in that a preset number of manned platforms A and a preset number of manned platforms B are arranged on the track in a walking mode respectively, the manned platforms A are connected with the rope A, the manned platforms B are connected with the rope B, the mining pedestrian walking aid can simultaneously go upwards and downwards to reduce waiting time of a user, conveying efficiency is high, occupied space is small relatively, the mining pedestrian walking aid is convenient to install, labor-saving and convenient and safe to use.
Description
The technical field is as follows:
the utility model relates to a mining pedestrian equipment technical field especially relates to a mining pedestrian helps capable ware.
Background art:
in the underground coal mine, inclined roadways widely exist, and underground workers often have great labor when walking in the inclined roadways. At present, the underground inclined drift mainly adopts an overhead passenger device to transport personnel, however, the overhead passenger device often has the following disadvantages: firstly, the aerial passenger device occupies a large space and needs to operate on two sides of a roadway respectively, so that the underground roadway with limited space is more narrow; secondly, the aerial passenger device has complex structure, inconvenient installation and maintenance and higher cost; thirdly, the safety of the aerial passenger device is relatively low, and potential safety hazards such as insecure hanging of the monkey vehicle, falling of the monkey vehicle and the like exist; fourthly, the person is also very inconvenient in getting on or off the monkey car in service, especially when the person carries knapsack or instrument, inconvenient reuse both hands go to hang and take off the monkey car.
The utility model patent of the utility model discloses an authorized bulletin number is "CN 207740038U", the name is "mining capable of moving ware" discloses a mining capable of moving ware, and it includes: the device comprises a bearing table, a transmission device and a driving device; the bearing table is provided with a bearing surface for bearing personnel; the transmission device is connected with the bearing table and is used for driving the bearing table to move along the inclined roadway; the driving end of the driving device is connected with the transmission device and used for providing power for the transmission device. The utility model discloses a mining helps capable ware when personnel need pass through the slope tunnel, can stand or sit and stand on the loading end, realize automatic movement through drive arrangement, and need not to walk through the slope tunnel, can save time and personnel physical power.
However, the above utility model still has the following problems: firstly, the mining walking aid can only go upwards or downwards independently, namely, after the people who go upwards have to wait for the people who go upwards to finish taking, the bearing platform can be taken to go upwards after the bearing platform runs reversely to the taking point; people needing to go down also need to wait for the people going up to finish the whole uplink stroke and then can take the bearing platform to go down; even if no person is in line for taking the bearing platform, if the person is at the bottom of the slope and the bearing platform is at the top of the slope, the person must wait for the bearing platform to be unloaded for a complete stroke to take the bearing platform of the mining walking aid. Therefore, the utility model discloses a mining helps capable ware availability factor lower in the above-mentioned utility model patent, has caused the waste of user's time, uses comparatively inconveniently, and the practicality is relatively poor. The inclined roadway pedestrian walking aid equipment which can simultaneously go up and down to reduce the waiting time of a user, occupies relatively small space, is convenient to install, saves labor, is convenient to use and is safe is lacked in the prior art.
The utility model has the following contents:
in order to solve the technical problem, the utility model provides a mining pedestrian helps capable ware can go upward simultaneously and with down in order to reduce user's latency, occupation space is less relatively, easy to assemble, comparatively laborsaving, convenient to use, safety.
The utility model discloses a realize through following technical scheme:
a pedestrian walking aid for mining is characterized by comprising a track, a transmission steel wire rope and a reciprocating driving device for driving the transmission steel wire rope to reciprocate; the rope body of the transmission steel wire rope longitudinally penetrates through the inside of the rail along the rail and winds back, double ropes with opposite transmission directions are formed in the rail, and each double rope comprises a rope A and a rope B; the track is provided with a preset number of manned platforms A and a preset number of manned platforms B in a walking mode, the manned platforms A are connected with the ropes A, and the manned platforms B are connected with the ropes B.
The utility model discloses an in another aspect, the equidistance is arranged between each manned platform A, and the equidistance is arranged between each manned platform B, and the interval between the adjacent manned platform A is equal with the interval between the adjacent manned platform B, manned platform A with the crisscross setting of manned platform B.
The utility model discloses an in another aspect, the track is one section or the multistage that meets around, and each section track is including two channel-section steels that are parallel to each other and inboard relative setting, the plane of locating of the intermediate lamella of channel-section steel is vertical plane.
In another aspect of the present invention, the track slope is set such that a slope of the track slope is identical to a slope of the installation roadway floor.
The utility model discloses an in another aspect, manned platform A and manned platform B include the footboard respectively, the footboard bottom is fixed with the mounting bracket, rotationally install on the mounting bracket and be no less than two sets of walking wheels, the wheel body of every group walking wheel both sides is walked respectively on the lower part pterygoid lamina of both sides channel-section steel, the channel-section steel top is located to the footboard level, manned platform A's mounting bracket is connected fixedly with rope A's rope body, manned platform B's mounting bracket is connected fixedly with rope B's rope body.
In another aspect of the present invention, the rope pressing wheel is rotatably fixed to the lower end of the mounting bracket, the rope B passes through the rope pressing wheel on the manned platform a from below and is separated from the contact with the mounting bracket of the manned platform a, and the rope a passes through the rope pressing wheel on the manned platform B from below and is separated from the contact with the mounting bracket of the manned platform B.
In another aspect of the present invention, a guardrail is fixed to one side of the upper end of the pedal, a handrail is fixed to the upper end of the guardrail, and the handrail is a "C" shape with an inward opening.
In another aspect of the present invention, the device further comprises a wire rope tensioning device, wherein the wire rope tensioning device acts on the transmission wire rope.
In another aspect of the present invention, the device further comprises a supporting and pressing rope device disposed around the track and used for guiding the rope.
The utility model discloses an in another aspect, hold in the palm and press rope device to include the base, be fixed with the riser that is parallel to each other of two vertical settings on the base, be fixed with the horizontal rope guide of predetermineeing quantity between two risers, horizontal rope guide is including fixing fixed axle and two rope guide wheels of rotationally fixing respectively on the fixed axle between two risers, and it has a grooving to open around the wheel face on the wheel body of every rope guide wheel, rope A with rope B gets into two grooving of horizontal rope guide respectively in, the front end and the rear end of base are rotationally fixed with vertical rope guide roller respectively, rope A with rope B is located the both sides of every vertical rope guide roller respectively.
The utility model has the advantages that: the mining pedestrian walking aid can simultaneously go up and down to reduce the waiting time of a user, and is high in conveying efficiency, small in occupied space, convenient to install, labor-saving, convenient to use and safe.
Description of the drawings:
fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention.
Fig. 2 is a schematic view of the connection relationship between the transmission steel wire rope and the manned platform a and the manned platform B.
Fig. 3 is a schematic view of a partial structure of a track in an embodiment of the present invention.
Fig. 4 is a schematic side view of the manned platform a and the manned platform B in the embodiment of the present invention.
In the drawings: 1. endless rope winch, 2, transmission wire rope, 201, rope A, 202, rope B, 3, manned platform A, 4, track, 401, channel-section steel, 5, manned platform B, 6, diversion wheel, 7, handrail, 8, guardrail, 9, footboard, 10, mounting bracket, 11, rope pressing wheel, 12, walking wheel, 13, rope clamping device.
The specific implementation mode is as follows:
the following will further explain the embodiments of the present invention with reference to the drawings and examples:
in the description of the present invention, it should be understood that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
A pedestrian walking aid for mines comprises a track 4, a transmission steel wire rope 2 and a reciprocating driving device for driving the transmission steel wire rope 2 to reciprocate, wherein in the embodiment, the reciprocating driving device adopts an endless rope winch 1, and the endless rope winch 1 is arranged in front of the track 4; the rope body of the transmission steel wire rope 2 longitudinally penetrates through the inside of the track 4 along the track 4 and winds back, double ropes with opposite transmission directions are formed in the track 4, each double rope comprises a rope A201 and a rope B202, in the embodiment, a turning wheel 6 is arranged behind the track 4, and the rope body of the transmission steel wire rope 2 penetrates through the track 4 and then winds back through the turning wheel 6; the tracks 4 are respectively provided with a preset number of manned platforms A3 and a preset number of manned platforms B5 in a walking manner, the manned platforms A3 are fixedly connected with the ropes A201, and the manned platforms B5 are fixedly connected with the ropes B202. The manned platforms A3 are arranged at equal intervals, the manned platforms B5 are arranged at equal intervals, the distance between every two adjacent manned platforms A3 is equal to the distance between every two adjacent manned platforms B5, and the manned platforms A3 and the manned platforms B5 are arranged in a staggered mode. The track 4 is one section or the multistage that meets from beginning to end, and each section track 4 includes two channel-section steels 401 that are parallel to each other and inboard relative setting, the plane of locating of the intermediate lamella of channel-section steel is vertical plane. The track 4 inclines, and the slope of the track 4 slope is consistent with the slope of installation tunnel bottom plate. Manned platform A3 and manned platform B5 include footboard 9 respectively, footboard 9 bottom welded fastening has mounting bracket 10, rotationally install on mounting bracket 10 and be no less than two sets of walking wheels 12, the wheel body of every group walking wheel 12 both sides is walked respectively on the lower part pterygoid lamina of both sides channel-section steel, the channel-section steel top is located to footboard 9 level, manned platform A3's mounting bracket 10 is connected fixedly through the card rope ware 13 of welding on mounting bracket 10 with rope A201's the rope body, manned platform B5's mounting bracket 10 is connected fixedly through the card rope ware 13 of welding on mounting bracket 10 with rope B202's the rope body. The lower end of the mounting bracket 10 is rotatably fixed with a rope pressing wheel 11, the rope B202 passes through the rope pressing wheel 11 on the manned platform A3 from the lower part and is separated from the contact with the mounting bracket 10 of the manned platform A3 so as to avoid the direct friction between the rope B202 and the mounting bracket 10 of the manned platform A3, and the rope A201 passes through the rope pressing wheel 11 on the manned platform B5 from the lower part and is separated from the contact with the mounting bracket 10 of the manned platform B5 so as to avoid the direct friction between the rope A201 and the mounting bracket 10 of the manned platform B5. A guardrail 8 is fixed on one side of the upper end of the pedal 9, a handrail 7 is fixed on the upper end of the guardrail 8, and the handrail 7 is of a C shape with an inward opening. The C-shaped handrail 7 plays a role in protecting a person standing on the pedal 9 in a three-side surrounding mode, and meanwhile, the person can conveniently grab the handrail in ascending and descending processes.
When the mining pedestrian walking aid is used, the track 4 of the mining pedestrian walking aid is laid on one side in an underground inclined roadway, the track 4 longitudinally penetrates through the inclined roadway, the endless rope winch 1 is installed in a drift above the inclined roadway, the turning wheel 6 is installed in the drift below the inclined roadway, and the rope body of the transmission steel wire rope 2 longitudinally penetrates through the inside of the track 4 along the track 4 and winds back through the turning wheel 6. When the transmission steel wire rope 2 operates, the running directions of the rope A201 and the rope B202 are opposite, the manned platform A3 is connected with the rope A201, and the manned platform B5 is connected with the rope B202, so that the running directions of the manned platform A3 and the manned platform B5 are always opposite, and the reciprocating driving device drives the transmission steel wire rope 2 to reciprocate within a distance, namely the manned platform A3 and the manned platform B5 realize relay operation. The manned platforms A3 arranged at equal intervals and the manned platforms B5 arranged at equal intervals are arranged in a staggered mode, a plurality of sections of relays are formed on the track 4, the track 4 is laid on one side of the underground inclined roadway, and personnel can transfer among the sections of relays to take the whole inclined roadway. Taking a person who is located at the slope bottom of an inclined roadway and wants to go to the slope top as an example, the person firstly stands on a pedal 9 of a manned platform A3 at the slope bottom, a rope A201 drives the manned platform A3 to ascend, a rope B202 drives the manned platform B5 to descend, when the manned platform A3 carried by the person meets one manned platform B5, the transmission steel wire rope 2 stops running, the person comes from the manned platform A3 to stand on the pedal 9 of the encountered manned platform B5, the transmission steel wire rope 2 reversely runs under the driving of a reciprocating driving device, so that the manned platform B5 carried by the person ascends, the manned platform B5 carried by the person meets the next manned platform A3, the person is changed to the encountered manned platform A3, and the rest is done in turn until the slope top of the roadway is reached. In the process that the personnel board the walking aid for the mining pedestrian to go upward, other personnel can board the slope bottom from the top of the slope in an opposite mode, in addition, the manned platform A3 at the lowest end can transport the next personnel who want to go upward after only completing one round trip of the travel of the manned platform A3 at the lowest end, the travel of the whole inclined roadway length does not need to be operated, therefore, the transportation efficiency is greatly improved, the waiting time of the personnel is greatly reduced, and the dead time is reduced. The number and spacing of the people carriers a3 and B5 may be set according to the length of the inclined roadway.
The mining pedestrian walking aid is relatively simple in structure, easy to install and maintain and relatively low in cost. The device can be arranged on one side of the roadway to realize ascending and descending simultaneously, thereby greatly saving the space of the roadway. Manned platform A3 and manned platform B5 and track 4 cooperation compare with traditional aerial passenger device, need not to hang, take more convenient, safer.
Example 2
A pedestrian walking aid for mines comprises a track, a transmission steel wire rope and a reciprocating driving device for driving the transmission steel wire rope to reciprocate, wherein in the embodiment, the reciprocating driving device adopts an endless rope winch; the rope body of the transmission steel wire rope longitudinally penetrates through the inside of the rail along the rail and winds back, double ropes with opposite transmission directions are formed in the rail, and each double rope comprises a rope A and a rope B; the track is provided with a preset number of manned platforms A and a preset number of manned platforms B in a walking mode, the manned platforms A are fixedly connected with the ropes A, and the manned platforms B are fixedly connected with the ropes B. Equidistance is arranged between each manned platform A, and equidistance is arranged between each manned platform B, and the interval between adjacent manned platform A is equal with the interval between adjacent manned platform B, manned platform A with manned platform B sets up in the crisscross way. The track is one section or the multistage that meets from beginning to end, and each section track includes two channel-section steels that are parallel to each other and inboard relative setting, the plane of locating of the intermediate lamella of channel-section steel is vertical plane. The track is arranged in an inclined mode, and the inclined slope of the track is consistent with the inclined slope of the installation roadway bottom plate. Manned platform A and manned platform B include the footboard respectively, footboard bottom welded fastening has the mounting bracket, rotationally install on the mounting bracket and be no less than two sets of walking wheels, the wheel body of every group walking wheel both sides is walked respectively on the lower part pterygoid lamina of both sides channel-section steel, the channel-section steel top is located to the footboard level, manned platform A's mounting bracket is connected fixedly through the card rope ware of welding on the mounting bracket with rope A's rope body, manned platform B's mounting bracket is connected fixedly through the card rope ware of welding on the mounting bracket with rope B's rope body. The lower end of the mounting frame is rotatably fixed with a rope pressing wheel, the rope B penetrates through the rope pressing wheel on the manned platform A from the lower part and is separated from the mounting frame of the manned platform A, so that direct friction between the rope B and the mounting frame of the manned platform A is avoided, and the rope A penetrates through the rope pressing wheel on the manned platform B from the lower part and is separated from the mounting frame of the manned platform B, so that direct friction between the rope A and the mounting frame of the manned platform B is avoided. A guardrail is fixed on one side of the upper end of the pedal, a handrail is fixed on the upper end of the guardrail and is in a C shape with an inward opening. The C-shaped handrail plays a role in protecting a person standing on the pedal in a three-side surrounding mode, and meanwhile, the person can conveniently grab the handrail in ascending and descending processes. The steel wire rope tensioning device is used for tensioning the transmission steel wire rope. The device also comprises a supporting and pressing rope device which is arranged at the front and the back of the track and used for guiding the rope. The rope supporting and pressing device comprises a base, wherein two vertical plates are fixed on the base in a welding mode and are parallel to each other, a preset number of horizontal rope guides are fixed between the two vertical plates, each horizontal rope guide comprises a fixed shaft fixed between the two vertical plates in a welding mode and two rope guide wheels rotatably fixed on the fixed shaft through bearings respectively, a rope groove is formed in the wheel body of each rope guide wheel in a wheel winding mode, a rope A and a rope B enter the two rope grooves of the horizontal rope guide respectively, a vertical rope guide roller shaft is rotatably fixed at the front end and the rear end of the base respectively, and the rope A and the rope B are located on two sides of each vertical rope guide roller shaft respectively.
When the mine pedestrian walking aid is used, the track of the mine pedestrian walking aid is laid on one side in an underground inclined roadway, the track longitudinally penetrates through the inclined roadway, the endless rope winch is installed in a drift above the inclined roadway, the steel wire rope tensioning device is installed in the drift below the inclined roadway, and the rope body of the transmission steel wire rope longitudinally penetrates through the interior of the track along the track and is wound back through the steel wire rope tensioning device. When the transmission steel wire rope runs, the running directions of the rope A and the rope B are opposite, the manned platform A is connected with the rope A, and the manned platform B is connected with the rope B, so that the running directions of the manned platform A and the manned platform B are always opposite, the reciprocating driving device drives the transmission steel wire rope to run in a reciprocating mode within a certain distance, and the manned platform A and the manned platform B achieve relay running. The manned platforms A arranged at equal intervals and the manned platforms B arranged at equal intervals are arranged in a staggered mode, a plurality of sections of relays are formed on the tracks, the tracks are laid on one side of the underground inclined roadway, and personnel can transfer among the sections of relays to take the whole inclined roadway. Taking a person who is located at the slope bottom of an inclined roadway and wants to go to the slope top as an example, the person firstly stands on a pedal of a manned platform A at the slope bottom, a rope A drives the manned platform A to go upwards, a rope B drives the manned platform B to go downwards, when the manned platform A taken by the person meets one manned platform B, a transmission steel wire rope stops running, the person comes from the manned platform A to go downwards, stands on the pedal of the encountered manned platform B, the transmission steel wire rope runs reversely under the driving of a reciprocating driving device, so that the manned platform B taken by the person goes upwards, the manned platform B taken by the person meets the next manned platform A, the person is transferred to the encountered manned platform A again, and the rest is done in a similar manner until the slope top of the roadway is reached. In the process that the personnel take the walking aid for the mining pedestrian to go upward, other personnel can take the walking aid from the top of the slope to the bottom of the slope in an opposite mode, in addition, the manned platform A at the lowest end can transport the next personnel who want to go upward after only completing one round trip of the self stroke, the stroke of the whole inclined roadway length does not need to be operated, so that the transport efficiency is greatly improved, the waiting time of the personnel is greatly reduced, and the dead time is reduced. The number and spacing of the people carriers a and B can be set according to the length of the inclined roadway.
The mining pedestrian walking aid is relatively simple in structure, easy to install and maintain and relatively low in cost. The device can be arranged on one side of the roadway to realize ascending and descending simultaneously, thereby greatly saving the space of the roadway. Manned platform A and manned platform B and track cooperation compare with traditional aerial passenger device, need not to hang, take advantage of more conveniently, safer.
In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A pedestrian walking aid for mining is characterized by comprising a track, a transmission steel wire rope and a reciprocating driving device for driving the transmission steel wire rope to reciprocate; the rope body of the transmission steel wire rope longitudinally penetrates through the inside of the rail along the rail and winds back, double ropes with opposite transmission directions are formed in the rail, and each double rope comprises a rope A and a rope B; the track is provided with a preset number of manned platforms A and a preset number of manned platforms B in a walking mode, the manned platforms A are connected with the ropes A, and the manned platforms B are connected with the ropes B.
2. The mining pedestrian walker as claimed in claim 1, wherein the manned platforms A are arranged at equal intervals, the manned platforms B are arranged at equal intervals, the distance between every two adjacent manned platforms A is equal to the distance between every two adjacent manned platforms B, and the manned platforms A and the manned platforms B are arranged in a staggered mode.
3. A mining pedestrian walker according to claim 1 or 2, characterized in that the rails are one section or a plurality of sections connected in front and back, each section of rail comprises two steel channels which are parallel to each other and arranged oppositely at the inner sides, and the planes of the middle plates of the steel channels are vertical planes.
4. A mining pedestrian walker according to claim 3 wherein the track is inclined at a slope corresponding to the slope of the floor of the installation roadway.
5. The mining pedestrian walking aid of claim 4, wherein the manned platform A and the manned platform B respectively comprise pedals, a mounting frame is fixed to the bottom of each pedal, at least two sets of walking wheels are rotatably mounted on the mounting frame, wheels on two sides of each walking wheel respectively walk on wing plates on two sides of a channel steel, each pedal is horizontally arranged above the channel steel, the mounting frame of the manned platform A is fixedly connected with a rope body of the rope A, and the mounting frame of the manned platform B is fixedly connected with the rope body of the rope B.
6. The mining pedestrian walker as claimed in claim 5, wherein the lower end of the mounting bracket is rotatably fixed with a rope pressing wheel, the rope B passes through the rope pressing wheel on the manned platform A from below and is separated from contact with the mounting bracket of the manned platform A, and the rope A passes through the rope pressing wheel on the manned platform B from below and is separated from contact with the mounting bracket of the manned platform B.
7. A mining pedestrian walker according to claim 6 wherein a guardrail is secured to one side of the upper end of the footplate, and a handrail is secured to the upper end of the guardrail, the handrail being of a "C" shape with an inward opening.
8. A mining pedestrian walker according to claim 1 or claim 2 further including a cable tensioning device acting on the drive cable.
9. A mining pedestrian walker according to claim 1 or claim 2 further comprising a rope carrying and pressing device for guiding the rope, located in front of and behind the track.
10. The mining pedestrian walker as claimed in claim 9, wherein the rope supporting and pressing device includes a base, two vertical plates disposed vertically and parallel to each other are fixed on the base, a predetermined number of horizontal rope guides are fixed between the two vertical plates, each horizontal rope guide includes a fixed shaft fixed between the two vertical plates and two rope guide wheels rotatably fixed on the fixed shaft, a rope groove is formed on a wheel body of each rope guide wheel around a wheel surface, the rope a and the rope B enter the two rope grooves of the horizontal rope guide respectively, vertical rope guide rollers are rotatably fixed on front and rear ends of the base respectively, and the rope a and the rope B are located on two sides of each vertical rope guide roller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021311920.2U CN212250126U (en) | 2020-07-07 | 2020-07-07 | Mining pedestrian walking aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021311920.2U CN212250126U (en) | 2020-07-07 | 2020-07-07 | Mining pedestrian walking aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212250126U true CN212250126U (en) | 2020-12-29 |
Family
ID=73979438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021311920.2U Expired - Fee Related CN212250126U (en) | 2020-07-07 | 2020-07-07 | Mining pedestrian walking aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212250126U (en) |
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2020
- 2020-07-07 CN CN202021311920.2U patent/CN212250126U/en not_active Expired - Fee Related
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