CN216269568U - Two-stage extension carriage - Google Patents
Two-stage extension carriage Download PDFInfo
- Publication number
- CN216269568U CN216269568U CN202121823067.7U CN202121823067U CN216269568U CN 216269568 U CN216269568 U CN 216269568U CN 202121823067 U CN202121823067 U CN 202121823067U CN 216269568 U CN216269568 U CN 216269568U
- Authority
- CN
- China
- Prior art keywords
- assembly
- bottom plate
- level
- power source
- expansion
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a two-stage expansion carriage body which comprises a fixed bottom plate, a top frame assembly and an expansion device, wherein the bottom surface of the fixed bottom plate is fixedly connected with a wheel assembly; the top frame component is arranged in parallel with the fixed bottom plate. The expansion device comprises a top expansion assembly, a side wall assembly and a movable bottom plate assembly; the inner side edge of the top unfolding component is connected with the edge of the top frame component; the movable bottom plate component can stretch out and draw back, and the lower end of the side wall component is hinged with the outer side edge of the movable bottom plate component. The two groups of driving devices are oppositely arranged on the lower end surface of the fixed bottom plate, and each driving device comprises a primary telescopic power source, a secondary telescopic power source and a bipolar guide mechanism; the power output shaft of the primary telescopic power source is connected with the middle part of the movable bottom plate assembly, and the power output shaft of the secondary telescopic power source is connected with the side wall assembly; the tail end of the bipolar guide mechanism is connected with the side wall assembly, and the two-stage extension carriage body can be used for two-stage extension, so that the aim of flexible use is fulfilled.
Description
Technical Field
The utility model relates to the field of automobiles, in particular to a two-stage extension compartment body.
Background
In modern life, with the improvement of living standard of people, the demand is continuously changing and increasing, especially the demand for vehicles. Whether going out or carrying goods, it is desirable that the space in the vehicle compartment is large. Thus, the cabin of many vehicles is an expandable cabin. However, most of the existing expandable carriages can only be expanded at one stage, and due to the adoption of the carriage, the carriage can be expanded once and is expanded in place in the using process, so that more expansion is easily formed in the using process, unnecessary space waste is caused, and meanwhile, more external space is occupied, and the action of the vehicle is not changed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a two-stage expansion carriage body which can be expanded in two stages so as to achieve the purpose of flexible use.
In order to achieve the purpose, the utility model is realized by the following technical scheme: a two-stage extension carriage, comprising:
the bottom surface of the fixed bottom plate is fixedly connected with the wheel assembly;
the top frame assembly is arranged in parallel with the fixed bottom plate;
the expansion devices are arranged in two groups and are oppositely positioned on the left side and the right side of the fixed bottom plate, and each expansion device comprises a top expansion assembly, a side wall assembly and a movable bottom plate assembly; the top unfolding component can stretch out and draw back, and the inner side edge of the top unfolding component is connected with the edge of the top frame component; the movable bottom plate assembly can stretch out and draw back, and the inner side edge of the movable bottom plate assembly is hinged with the edge of the fixed bottom plate; the upper end of the side wall component is connected with the outer side edge of the top unfolding component, and the lower end of the side wall component is hinged with the outer side edge of the movable bottom plate component; and
the two groups of driving devices are oppositely arranged on the lower end face of the fixed bottom plate, and each group of driving devices comprises a primary telescopic power source, a secondary telescopic power source and a bipolar guide mechanism; the primary telescopic power source and the secondary telescopic power source are both connected to the lower end face of the fixed bottom plate, a power output shaft of the primary telescopic power source is connected with the middle part of the movable bottom plate assembly, and a power output shaft of the secondary telescopic power source is connected with the side wall assembly; the bipolar guide mechanism is arranged on the lower end face of the fixed base plate and extends along the width direction of the fixed base plate, the tail end of the bipolar guide mechanism is connected with the side wall assembly, and the bipolar guide mechanism can conduct bipolar guide.
Further, the roof deployment assembly comprises a primary roof extension panel and a secondary roof extension panel; one end of the secondary expansion top plate is fixedly connected with the side wall assembly, and the other end of one end of the secondary expansion top plate is provided with a second baffle; the bottom surface of the edge of the top frame assembly is provided with a first guide groove; be provided with first slider on the top surface of one-level extension roof, the card that first slider can slide is established in the first guide way, one end that the roof-rack subassembly was kept away from to one-level extension roof is provided with first baffle, works as one-level extension roof with when second grade extension roof moves furthest along the direction of carrying on the back mutually, first baffle with the second baffle can block each other.
Furthermore, the movable bottom plate assembly comprises four movable plates which are flexibly hinged with each other, the movable bottom plate assembly can be folded in an M shape, and the movable plates positioned on two sides are respectively connected with the fixed bottom plate and the bottom of the side wall assembly hinged side wall assembly on the same side.
Furthermore, the bipolar guide mechanism comprises two primary roller mounting plates, two groups of primary rollers, two primary slide rails, two groups of secondary rollers and one secondary slide rail; two the one-level gyro wheel mounting panel is relative install PMKD is last, and along PMKD's width direction extends, and is two sets of the one-level gyro wheel sets up respectively two on the opposite face on the one-level gyro wheel mounting panel, two the one-level slide rail sets up relatively, two towards the homonymy the one-level spout has been seted up along its length direction on the terminal surface of one-level gyro wheel, the card that the one-level slide rail can roll is established at the homonymy in the one-level spout, two sets of the second grade gyro wheel sets up respectively two the one-level slide rail is kept away from the terminal surface of one-level gyro wheel, the second grade spout has been seted up to the both sides of second grade slide rail, and is two sets of the card that the one-level gyro wheel can roll respectively is established at the homonymy in the second grade spout, just the end of second grade slide rail with lateral wall subassembly links to each other.
Furthermore, the two-stage extension carriage body also comprises two support legs which are oppositely arranged, the bottoms of the support legs can be supported on the ground, and the tops of the support legs can be supported on the bottom surface of the movable bottom plate assembly.
The utility model has the beneficial effects that:
the two-stage expansion carriage body comprises a fixed bottom plate, a top frame assembly and an expansion device, wherein the bottom surface of the fixed bottom plate is fixedly connected with a wheel assembly; the top frame assembly is arranged in parallel with the fixed bottom plate; the expansion device comprises two groups and is oppositely positioned on the left side and the right side of the fixed bottom plate, and the expansion device comprises a top expansion assembly, a side wall assembly and a movable bottom plate assembly. The top unfolding component can stretch out and draw back, and the inner side edge of the top unfolding component is connected with the edge of the top frame component. The movable bottom plate component can stretch out and draw back, and the inner side edge of the movable bottom plate component is hinged with the edge of the fixed bottom plate. The upper end of the side wall component is connected with the outer side edge of the top unfolding component, and the lower end of the side wall component is hinged with the outer side edge of the movable bottom plate component.
Two groups of driving devices are oppositely arranged on the lower end surface of the fixed bottom plate, and each group of driving devices comprises a primary telescopic power source, a secondary telescopic power source and a bipolar guide mechanism; the primary telescopic power source and the secondary telescopic power source are both connected to the lower end face of the fixed bottom plate, a power output shaft of the primary telescopic power source is connected with the middle part of the movable bottom plate assembly, and a power output shaft of the secondary telescopic power source is connected with the side wall assembly; the bipolar guide mechanism is arranged on the lower end face of the fixed base plate and extends along the width direction of the fixed base plate, the tail end of the bipolar guide mechanism is connected with the side wall assembly, and the bipolar guide mechanism can conduct bipolar guide.
When the carriage body needs to be expanded, a primary telescopic power source is started firstly, the primary telescopic power source drives the top expansion assemblies and the movable bottom plate assemblies on two sides to perform primary expansion, and the two side wall assemblies move towards two sides for the first time respectively to complete primary expansion; after still needing to increase the width of the railway carriage or compartment body, then need start the flexible power supply of second grade, the flexible power supply of second grade drives the top expansion subassembly and the activity bottom plate subassembly of both sides once more and carries out the second grade extension, and two lateral wall subassemblies carry out the second removal to both sides respectively, accomplish the second grade extension.
By adopting the mode, the two-stage expansion can be respectively carried out, in the using process, the phenomenon that more expansion is formed and unnecessary space waste is caused is avoided, and meanwhile, the external space of the carriage is reduced, and convenience is brought to the movement of the vehicle.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
Fig. 1 is a rear view of a two-stage extended car in a deployed state according to an embodiment of the present invention;
figure 2 is a top view of the two-stage expansion car of figure 1 with the car in an expanded state;
figure 3 is a schematic view of the two-stage extension car of figure 1 with the car in a retracted state;
figure 4 is a schematic view of a bi-polar guidance mechanism in a two-stage extension car shown in figure 1;
figure 5 is a cross-sectional view of the bi-polar guidance mechanism of a two-stage extension carriage shown in figure 1;
reference numerals:
100. fixing the bottom plate;
200. a top frame assembly;
300. an expansion device; 310. a top deployment assembly; 311. a primary expanded roof; 312. a secondary expanded roof; 313. a first baffle plate; 314. a second baffle; 320. a sidewall assembly; 330. a movable floor assembly; 331-a movable plate;
400. a drive device; 410. a primary telescopic power source; 420. a secondary telescopic power source; 430. a bipolar guide mechanism; 431. a primary roller mounting plate; 432. a first-stage roller; 433. a first-stage slide rail; 434. a secondary roller; 435. a secondary slide rail;
500. and (5) supporting legs.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1 to 5, the present invention provides a two-stage extension carriage, which includes a fixed base plate 100, a top frame assembly 200, an extension device 300 and a driving device 400. The carriage body capable of carrying out two-pole extension is formed.
Specifically, the bottom surface of the fixed base plate 100 is fixedly connected to the wheel assembly. The top chassis assembly 200 is disposed in parallel with the fixed base plate 100. The expansion devices 300 are provided in two sets and are located at the left and right sides of the fixed base plate 100. The expansion device 300 includes a top deployment assembly 310, a sidewall assembly 320, and a movable floor assembly 330. The top deployment element 310 is capable of telescoping, and the inside edge of the top deployment element 310 is connected to the edge of the top frame element 200. The movable floor assembly 330 is retractable. The inner side edge of the movable floor member 330 is hinged to the edge of the fixed floor 100. The upper ends of the side wall members 320 are connected to the outer sides of the roof deployment assembly 310 and the lower ends of the side wall members 320 are hinged to the outer sides of the movable floor member 330. Thus, the fixed floor 100, the roof rack assembly 200, the roof deployment assembly 310, the sidewall assembly 320, and the movable floor assembly 330 may form a compartment of a car.
The driving device 400 is used for driving the two groups of expansion devices 300 to respectively perform two-stage expansion towards two sides. There are two sets of drive devices 400. Two sets of driving devices 400 are oppositely disposed on the lower end surface of the fixed base plate 100. Each set of drives 400 includes a primary telescoping power source 410, a secondary telescoping power source 420, and a bipolar steering mechanism 430. The primary telescopic power source 410 and the secondary telescopic power source 420 are both connected to the lower end surface of the fixed base plate 100. The power output shaft of the primary telescopic power source 410 is connected with the middle part of the movable bottom plate assembly 330. The power output shaft of the secondary telescoping power source 420 is connected to the sidewall assembly 320. In specific implementation, the primary telescopic power source 410 and the secondary telescopic power source 420 may be used as a common telescopic cylinder or a telescopic link mechanism or other mechanisms capable of providing a telescopic source.
The bipolar guide 430 is disposed on the lower end surface of the fixed base plate 100 and extends along the width direction of the fixed base plate 100, the tail end of the bipolar guide 430 is connected to the side wall assembly 320, and the bipolar guide 430 can perform bipolar guiding and support the side wall assembly 320 and the top frame assembly 200.
When the carriage needs to be expanded, the first-stage telescopic power source 410 is started, the first-stage telescopic power source 410 drives the top expansion assemblies 310 and the movable bottom plate assembly 330 on two sides to perform first-stage expansion, and the two side wall assemblies 320 move towards two sides for the first time respectively to complete the first-stage expansion; when the width of the carriage body needs to be increased, the secondary telescopic power source 420 needs to be started, the secondary telescopic power source 420 drives the top unfolding assemblies 310 and the movable bottom plate assembly 330 on the two sides again to perform secondary expansion, and the two side wall assemblies 320 move towards the two sides for the second time respectively to complete secondary expansion.
By adopting the mode, the two-stage expansion can be respectively carried out, in the using process, the phenomena that more expansion is caused and unnecessary space is wasted are avoided, and meanwhile, the external space of the carriage is reduced, and convenience is brought to the movement of the vehicle.
In this embodiment, the roof deployment assembly 310 includes a primary expanded roof 311 and a secondary expanded roof 312. One end of the secondary expanded top plate 312 is fixedly connected with the sidewall assembly 320, and the other end of one end of the secondary expanded top plate 312 is provided with a second baffle 314. The bottom surface of the edge of the top frame assembly 200 is provided with a first guide groove; the top surface of the first-stage extension top plate 311 is provided with a first sliding block, and the first sliding block can be slidably clamped in the first guide groove. The end of the primary expanded top plate 311 away from the top frame assembly 200 is provided with a first blocking plate 313, and when the primary expanded top plate 311 and the secondary expanded top plate 312 move furthest along opposite directions, the first blocking plate 313 and the second blocking plate 314 can block each other.
The movable bottom plate assembly 330 includes four movable plates 331 flexibly hinged to each other, the movable bottom plate assembly 330 can be folded in an M shape, and the movable plates 331 located at both sides are respectively connected to the bottoms of the hinged side wall assemblies 320 of the same-side fixed bottom plate 100 and the side wall assemblies 320.
The bipolar guide mechanism 430 comprises two primary roller mounting plates 431, two groups of primary rollers 432, two primary slide rails 433, two groups of secondary rollers 434 and one secondary slide rail 435; two relative installations on PMKD 100 of one-level gyro wheel mounting panel 431, and extend along PMKD 100's width direction, two sets of one-level gyro wheels 432 set up respectively on the opposite face on two one-level gyro wheel mounting panels 431, two one-level slide rails 433 set up relatively, two one-level slide rails 433 have seted up the one-level spout towards its length direction on the terminal surface of the one-level gyro wheel 432 of homonymy, the one-level spout at the homonymy is established to the card that one-level slide rails 433 can roll, two sets of second grade gyro wheels 434 set up the terminal surface of keeping away from one-level gyro wheel 432 at two one-level slide rails 433 respectively, the second grade spout has been seted up to the both sides of second grade slide rail 435, two sets of one-level gyro wheels 432 can rolling card respectively establish in the second grade spout of homonymy, and the end of second grade slide rail 435 links to each other with lateral wall subassembly 320.
At ordinary times, the carriage body is in a retraction state, at this moment, the second-stage extension top plate 312 and the first-stage extension top plate 311 are retracted under the roof rack assembly 200, the four movable plates 331 are M-shaped and folded, when the first-stage extension is needed, the first-stage telescopic power source 410 is started, the power output shaft of the first-stage telescopic power source 410 extends outwards, the left two movable plates 331 and the right two movable plates 331 close to the fixed bottom plate 100 can be pushed to extend slowly, meanwhile, the first-stage extension top plate 311 slides to the left and the right along the first guide groove, the first-stage sliding rails 433 move to the left and the right, and when the power output shaft of the first-stage telescopic power source 410 is at the maximum extension, the first-stage extension is completed.
When the secondary expansion is needed, the secondary expansion power source 420 is started, the power output shaft of the secondary expansion power source 420 extends outwards, the side wall assemblies 320 on the two sides can be pushed to move towards the left side and the right side respectively, the left two movable plates 331 and the right two movable plates 331 which are far away from the fixed bottom plate 100 are driven, the secondary slide rails 435 move towards the left side and the right side of the whole vehicle body, the secondary expansion top plate 312 moves along with the side wall assemblies 320, when the power output shaft of the secondary expansion power source 420 is at the maximum extension, the first baffle 313 abuts against the second baffle 314, the four movable plates 331 are in a completely expanded state, and the secondary expansion is completed.
In this embodiment, it is preferable that the two-stage extension carriage further includes a support leg 500. The support legs 500 are provided in two and are oppositely disposed. The bottom of the support leg 500 can be supported on the ground and the top of the support leg 500 can be supported on the bottom surface of the movable floor assembly 330. When the carriage is not expanded, the supporting legs 500 are placed in the carriage, and after the carriage is expanded, the supporting legs 500 can be taken out and supported below the carriage, so that the carriage is supported in an auxiliary manner.
In the use process of the two-stage extension carriage body, the whole carriage body is in a retraction state, when the first-stage extension is needed, the first-stage extension power source 410 is started, the first-stage extension can be carried out, and the carriage body is properly widened; after the primary expansion is carried out and the width needs to be expanded, the secondary telescopic power source 420 is started, the secondary expansion can be carried out, the carriage body is expanded to the maximum, and therefore the use requirement is met. This two-stage extension railway carriage or compartment body can carry out both sides extension respectively, and the two-stage extension avoids the extension more in the use, causes unnecessary space waste, simultaneously, can reduce the exterior space in carriage, brings the convenience for the vehicle action.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (5)
1. A two-stage extension compartment, comprising:
the bottom surface of the fixed bottom plate is fixedly connected with the wheel assembly;
the top frame assembly is arranged in parallel with the fixed bottom plate;
the expansion devices are arranged in two groups and are oppositely positioned on the left side and the right side of the fixed bottom plate, and each expansion device comprises a top expansion assembly, a side wall assembly and a movable bottom plate assembly; the top unfolding component can stretch out and draw back, and the inner side edge of the top unfolding component is connected with the edge of the top frame component; the movable bottom plate assembly can stretch out and draw back, and the inner side edge of the movable bottom plate assembly is hinged with the edge of the fixed bottom plate; the upper end of the side wall component is connected with the outer side edge of the top unfolding component, and the lower end of the side wall component is hinged with the outer side edge of the movable bottom plate component; and
the two groups of driving devices are oppositely arranged on the lower end face of the fixed bottom plate, and each group of driving devices comprises a primary telescopic power source, a secondary telescopic power source and a bipolar guide mechanism; the primary telescopic power source and the secondary telescopic power source are both connected to the lower end face of the fixed bottom plate, a power output shaft of the primary telescopic power source is connected with the middle part of the movable bottom plate assembly, and a power output shaft of the secondary telescopic power source is connected with the side wall assembly; the bipolar guide mechanism is arranged on the lower end face of the fixed base plate and extends along the width direction of the fixed base plate, the tail end of the bipolar guide mechanism is connected with the side wall assembly, and the bipolar guide mechanism can conduct bipolar guide.
2. The two-stage extension carriage of claim 1, wherein the roof deployment assembly includes a primary extension roof and a secondary extension roof; one end of the secondary expansion top plate is fixedly connected with the side wall assembly, and the other end of one end of the secondary expansion top plate is provided with a second baffle; the bottom surface of the edge of the top frame assembly is provided with a first guide groove; be provided with first slider on the top surface of one-level extension roof, the card that first slider can slide is established in the first guide way, one end that the roof-rack subassembly was kept away from to one-level extension roof is provided with first baffle, works as one-level extension roof with when second grade extension roof moves furthest along the direction of carrying on the back mutually, first baffle with the second baffle can block each other.
3. The two-stage extension carriage as claimed in claim 1, wherein the movable floor assembly comprises four movable panels flexibly hinged to each other, and the movable floor assembly can be folded in an M-shape, and the movable panels on both sides are respectively connected to the fixed floor and the bottom of the hinged sidewall assembly on the same side.
4. The two-stage extension carriage according to claim 1, wherein the bi-polar guidance mechanism comprises two primary roller mounting plates, two sets of primary rollers, two primary slide rails, two sets of secondary rollers, and one secondary slide rail; two the one-level gyro wheel mounting panel is relative install PMKD is last, and along PMKD's width direction extends, and is two sets of the one-level gyro wheel sets up respectively two on the opposite face on the one-level gyro wheel mounting panel, two the one-level slide rail sets up relatively, two towards the homonymy the one-level spout has been seted up along its length direction on the terminal surface of one-level gyro wheel, the card that the one-level slide rail can roll is established at the homonymy in the one-level spout, two sets of the second grade gyro wheel sets up respectively two the one-level slide rail is kept away from the terminal surface of one-level gyro wheel, the second grade spout has been seted up to the both sides of second grade slide rail, and is two sets of the card that the one-level gyro wheel can roll respectively is established at the homonymy in the second grade spout, just the end of second grade slide rail with lateral wall subassembly links to each other.
5. The two-stage expansion compartment of claim 1, further comprising two support legs, wherein the two support legs are disposed opposite to each other, wherein the bottom of each support leg can be supported on the ground, and the top of each support leg can be supported on the bottom surface of the movable floor assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121823067.7U CN216269568U (en) | 2021-08-05 | 2021-08-05 | Two-stage extension carriage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121823067.7U CN216269568U (en) | 2021-08-05 | 2021-08-05 | Two-stage extension carriage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216269568U true CN216269568U (en) | 2022-04-12 |
Family
ID=81060297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121823067.7U Active CN216269568U (en) | 2021-08-05 | 2021-08-05 | Two-stage extension carriage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216269568U (en) |
-
2021
- 2021-08-05 CN CN202121823067.7U patent/CN216269568U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11059423B1 (en) | Extendable bed for pickup truck | |
| CN107938848B (en) | Electric expansion device for shelter and electric expansion shelter | |
| CN201553077U (en) | Transfiguration type movable stage car | |
| CN105565209A (en) | Multifunctional lifting device for vehicle and usage method | |
| CN107097715A (en) | A kind of police mobile office shelter | |
| CN216269568U (en) | Two-stage extension carriage | |
| CN202378767U (en) | Mobile stage truck with body-capacity changeable dressing room | |
| CN209890197U (en) | Front bumper maintenance support | |
| CN204801608U (en) | Rear -mounted removal car maintenance servicer | |
| CN206765898U (en) | A kind of police mobile office shelter | |
| CN104999954A (en) | Multifunctional expanding and retracting compartment used on passenger car, goods van or trailer | |
| CN103600681A (en) | Full-automatic camping vehicle | |
| CN2456964Y (en) | Horizontal open and folding changeable room type automatic carriage | |
| DE102011051891A1 (en) | Roof box for motor vehicles for forming usable inner space, has base element, cover element, rear wall and two side walls, where rear wall and two side walls are connected with cover element by upper hinge | |
| CN212667418U (en) | Shallow | |
| CN209903195U (en) | AGV with extension platform | |
| CN203920550U (en) | Paulin prevents dust in auto spring roller shutter type compartment | |
| CN103144699A (en) | Body sling righting device and body sling | |
| CN219883776U (en) | Telescopic roof luggage rack and automobile | |
| CN202754044U (en) | Bilaterally expandable vehicle | |
| CN111169365A (en) | Novel field operations of on-vehicle equipment is salvageed device | |
| CN217623284U (en) | Vehicle bearing landing structure and vehicle | |
| KR101495032B1 (en) | Vehicle with length and space extending function | |
| CN218949027U (en) | Carriage lifting structure of airplane food vehicle | |
| CN218616183U (en) | Folding tarpaulin supporting device for vehicle tarpaulin system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |