CN206478424U - Adjustable projector hanger bracket - Google Patents
Adjustable projector hanger bracket Download PDFInfo
- Publication number
- CN206478424U CN206478424U CN201720021018.9U CN201720021018U CN206478424U CN 206478424 U CN206478424 U CN 206478424U CN 201720021018 U CN201720021018 U CN 201720021018U CN 206478424 U CN206478424 U CN 206478424U
- Authority
- CN
- China
- Prior art keywords
- mounting bracket
- rotating disk
- projecting apparatus
- chute
- adjustable projector
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of adjustable projector hanger bracket, elevating mechanism including upper mounting bracket, both both sides of lower mounting bracket and connection, the servomotor rotated on upper mounting bracket provided with screw mandrel slide block mechanism and drive screw, the elevating mechanism of both sides is driven to complete symmetrical lifting by a motor, the micro machine for being provided with rotating disk and driving rotating disk rotation of lower mounting bracket lower rotatable, rotating disk bottom is provided with the projecting apparatus container for placing projecting apparatus.Using above structure, suspension to projecting apparatus is realized by simple structure, the lifting that projecting apparatus is symmetrically stablized is realized using simple elevating mechanism, while by controlling rotating disk by micro machine, realizing that the rotation to bottom projecting apparatus is controlled, the projecting direction of multiple-aspect control projecting apparatus, projecting apparatus using effect is improved, the achievement for improving projection teaching or projection displaying is helped, and it is simple in construction, easy to process to install, service life is more permanent.
Description
Technical field
The utility model belongs to projecting apparatus auxiliary installing device field, and in particular to a kind of adjustable projector hanger bracket.
Background technology
With the development of the society, various projecting apparatus widely enter in the life of people, most of quilts
Used in classroom, meeting exhibition room and company's meeting room etc. are imparted knowledge to students or demonstrated using projecting apparatus, can preferably be imparted knowledge to students and table
Up to the true intention of demonstrator.Current projecting apparatus is main by portable and fixed, and portable general utility functions are more single but victory exists
It is easy to carry, and be fixed on fixed projecting apparatus on the ceiling in place, most of fixations using straight tube constant height formula more
Mode, in use due to resolution ratio the problems such as, frequently result in drop shadow effect undesirable.And other can using height
The mode of tune is fixed, and how more complicated its structure is, and long-term use deviation ratio is larger, and using adjustable mode is lifted, it is thrown
Also fixation is compared in shadow direction, it is impossible to which projecting direction is changed, also can a certain degree of influence drop shadow effect.
Utility model content
To solve above technical problem, simplify the lifting device structure of projecting apparatus, while can be to projector projects
Horizontal rotation is done in direction, and different places are projected as needed, and the utility model is outstanding there is provided a kind of adjustable projector
Hanger.
To achieve the above object, the technical solution of the utility model is as follows：
A kind of adjustable projector hanger bracket, including upper mounting bracket, the elevating mechanism of lower mounting bracket and connection between the two,
It is characterized by：The elevating mechanism includes connecting upper mounting bracket and the fork-shaped retraction rack of lower mounting bracket both sides respectively, it is described on
Mounting bracket is in hollow structure, is provided with this in the middle part of mounting bracket along long axis direction in the first chute, first chute and is provided with screw mandrel, should
Screw mandrel is provided with two the first sliding blocks coordinated with its screw thread, and the thread rotary orientation of two first sliding blocks is on the contrary, described first
Runner rear end be provided with can drive screw rotate servomotor；
The upper mounting bracket both sides are arranged with the second chute, two first sliding blocks and are installed with connecting rod, the company
The end of bar is installed with the second sliding block mutually fitted with second chute, slidable embedded second chute of second sliding block
In；
The position of the second chute of the lower mounting bracket top both sides correspondence is provided with slideway, the upper end two of the forked type retraction rack
Collateral point is hinged with two second sliding blocks respectively, and lower end both sides fulcrum is movably arranged in the slideway, and can be along its axle
To slip；
It is connected with rotating disk, the mounting bracket is provided with the driving rotation disc spins the lower mounting bracket lower rotatable
Micro machine；
The rotating disk bottom is detachably connected with projecting apparatus container.
Using above structure, drive screw mandrel to rotate by a motor, the opposite sliding block of two thread rotary orientations is driven with this
Slide, so as to realize the symmetric shrinkage of fork-shaped retraction rack, reach the adjustable height regulation to projecting apparatus, relatively conventional drum-type
Shrink, structure is simpler, and without flexible piece, service life is longer, and drive rotating disk to rotate by micro machine, can easily realize
Horizontally rotating for projecting apparatus, adjusts its projecting direction again, obtains more preferable drop shadow effect.
As preferred：Two are provided with the middle part of first chute along axisymmetrical and the spacing block set of radial protrusion, two
The distance between described spacing block set is less than the width of first sliding block.Using above structure, two are limited by spacing block set
The stroke of individual first sliding block, effectively prevents from using for a long time, two the first sliding blocks is inclined to one end of the first chute, cause device
Centre-of gravity shift, influence service life.
As preferred：The rotating disk periphery is provided with engaging tooth, the power transmission shaft of the micro machine and is connected with and rotating disk
Meshed gears.Using above structure, micro machine drives rotating disk to rotate by gear, simple in construction, it is easy to installs and realizes.
As preferred：The rotating disk top has step, and the engaging tooth is arranged on the side of the step, the gear
Engage and be on step.Using above structure, gear is between the step of rotating disk and the bottom of lower mounting bracket,
Positioned at the environment of a relative closure, power transmission shaft can be preferably protected, is also prevented from gear and comes off to hurt sb.'s feelings.
As preferred：Rotated and connected by the bearing pin being vertically arranged between the lower mounting bracket and rotating disk, on the bearing pin
Portion has first shaft shoulder, and the bearing pin upper end end is provided with screw, and the lower mounting bracket is fixedly mounted on first shaft shoulder and pin
Between the end of axle upper end, and locked with clamping screw；
The rotating disk is arranged on the bottom of the bearing pin by bearing, and the bearing pin lower end correspondence bearing is provided with the second axle
Shoulder.Using above scheme, by setting shaft shoulder bearing fit, lower mounting bracket is set to connect and not be close to, rotating disk with rotating disk
During rotation will not by lower mounting bracket frictional force, rotate it is more smooth, it is necessary to kinetic energy it is smaller.
As preferred：The lower mounting bracket is surrounded by the extension extended downwardly for blocking rotating disk.More than
Structure, lower mounting bracket, which is extended downwardly, makes the surrounding of rotating disk all be within the scope of its parcel, it is to avoid the engagement of rotating disk periphery
Tooth is exposed, influences neat appearance.
As preferred：The projecting apparatus container is just installed to rotation tray bottom, is detachably connected by bolt.Use with
Upper structure：The stability for being provided with and ensureing device is co-axially mounted, different size of projecting apparatus can be changed as needed by bolt
Container, and without replacing with the structure in portion.
As preferred：The projecting apparatus container is in hollow structure, and front end is provided with optical port is penetrated, and rear end is hinged with bonnet, should
After cover provided with incoming line.Using above structure：It is more convenient picking and placeing and connection for projecting apparatus.
Compared with prior art, the beneficial effects of the utility model are：
The adjustable projector hanger bracket that the utility model is provided, the suspension to projecting apparatus is realized by simple structure,
And simple elevating mechanism realizes the lifting that projecting apparatus is symmetrically stablized, while by controlling rotating disk, realization pair by micro machine
The anglec of rotation control of bottom projecting apparatus, the projecting direction of multiple-aspect control projecting apparatus improves projecting apparatus using effect, structure letter
Single, it is easy to which that processing is installed, service life is more permanent.
Brief description of the drawings
Fig. 1 is the side view of the embodiment of the utility model one；
Fig. 2 is upper mounting bracket internal structure schematic diagram in Fig. 1；
Fig. 3 is lower mounting bracket and rotating disk attachment structure schematic diagram in Fig. 1；
Fig. 4 is rotating disk and gear engagement structure schematic diagram.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Adjustable projector hanger bracket with reference to shown in Fig. 1 and Fig. 2, in the middle part of upper mounting bracket 1 of hollow structure along major axis
Direction is provided with the first chute 11, and screw mandrel 111 is provided with it, is rotated in the rear end of the first chute 11 provided with drive screw 111
Servomotor 4, screw mandrel 111 is mutually fitted provided with two the first sliding blocks 112 coordinated with its screw thread, size with the first chute 11, and
The thread rotary orientation of two the first sliding blocks 112 is on the contrary, when i.e. screw mandrel 111 is rotated, two the first sliding blocks 112 are opposite or reverse fortune
It is dynamic, rather than motion in the same direction；
The both sides of the edge of upper mounting bracket 1 are symmetrically provided with the second chute 12, two the first sliding blocks 112 along long axis direction
Connecting rod 113 is installed with, connecting rod 113 is vertical with the direction of screw mandrel 111, the end of two connecting rods 113 is installed with and the second chute 12
In the second sliding block 121 mutually fitted, slidable embedded second chute 12 of four the second sliding blocks 121, in the second chute 12
Motion state and stroke are consistent with the first sliding block 112.
The centre of first chute 11 provided with two along axisymmetrical and radially projecting spacing block set 114, and two limits
The distance between position projection 114 is less than the width of two the first sliding blocks 112, and more than the external diameter of screw mandrel 111, spacing block set 114 will
First chute 11 is divided into two symmetrical parts, and two the first sliding blocks 112 are respectively in one of part, and cannot pass through
Gap between two spacing block sets 114, defines the movement travel of two the first sliding blocks 112, it is ensured that will not be because using for a long time
And cause two the first sliding blocks 112 to be all partial to the side of the first chute 11, make the center of gravity of device shift, so as to influence to make
Use the life-span.
Connected between upper mounting bracket 1 and lower mounting bracket 2 by elevating mechanism, elevating mechanism mainly includes two in the present embodiment
Individual fork-shaped retraction rack 3, two fork-shaped retraction racks 3 connect mounting bracket 1 and the corresponding both sides of lower mounting bracket 2 respectively, and fork-shaped shrinks
Frame 3 is hinged by more piece hinge bar and formed, and forms fork configuration up and down, and all has two separated fulcrums up and down, such as Fig. 1 institutes
Show, fork-shaped retraction rack 3 first on fulcrum (31) with being hinged in the second sliding block 121 of the front end of the second chute 12, propped up on second
Point 32 is hinged with the second sliding block 121 in the rear end of the second chute 12.
Slideway 21 is equipped with two sides of lower mounting bracket 2, the chute 12 of slideway 21 and second is in same perpendicular, really
Protecting lifting structure can connect vertically, and slideway 21 is concave, and the first lower fulcrum of lower end 33 of fork-shaped retraction rack 3 is slidably mounted on
The front end of slideway 21, the second lower fulcrum 34 is slidably mounted on the rear end of slideway 21, and the lifting of substructure so can be achieved,
When the drive screw 111 of servomotor 4 is rotated clockwise, and because the thread rotary orientation of two the first sliding blocks 112 is on the contrary, then two the
One sliding block 112 is away from sliding, while pulling on the first of fork-shaped retraction rack, fulcrum 32 deviates from motion, bottom on fulcrum 31 and second
Slide, then can realize and carry out substructure rise, conversely, screw mandrel 111 is rotated counterclockwise, then bottom lower, because fortune
When dynamic, the movement velocity and stroke limiting of two the first sliding blocks 112 so that in lifting process be all symmetrical action will not make
Beat phenomenon occurs for device, and stability is high.
With reference to Fig. 1, Fig. 3 and Fig. 4, the bottom that lower installation fills 2 has been rotatably coupled rotating disk 5, Liang Zhetong by bearing pin 7
Axle is connected, and the top of bearing pin 7 has first shaft shoulder 71, and lower mounting bracket 2 is then fixedly mounted on first shaft shoulder and 71 upper with bearing pin 7
Hold between end, the upper end end of bearing pin 7 is provided with screw, after mounting bracket 2 is fixedly mounted instantly, top is locked by clamping screw 72
Extremely, it is ensured that will not be relatively rotated between lower mounting bracket 2 and bearing pin 7；
The bottom of bearing pin 7 has second shaft shoulder 73, is provided with bearing 74 between second shaft shoulder 73 and first shaft shoulder 71, and the
Two shaft shoulders 73 are connected on the fixation inner ring of bearing 74, and rotating disk 5 is rotatably connected by bearing 74 with bearing pin 7, and rotation
Gap is left between the bottom wall of the roof of disk 5 and lower mounting bracket 2, so that lower mounting bracket 2 is by the load-bearing of first shaft shoulder 71, rotation
The frictional resistance that disk 5 would not be given when rotating by lower mounting bracket 2, substantially reduces the kinetic energy required for rotating.
The lower surrounding of mounting bracket 2 has the extension 24 extended downwardly, and the whole surrounding of rotating disk 5 is hidden and encased by extension 24,
Make device more closedization.
Rotating disk 5 is in cylindrical structure, and its top has the round platform of reduced radius, and forms step 51, step with bottom
51 side is provided with engaging tooth, lower mounting bracket 2 and is provided with micro machine 22, and the power transmission shaft of micro machine 22 is connected with gear 23, tooth
Wheel 23 is engaged with the engaging tooth of the side of step 51, under the driving of micro machine 22, rotating disk 5 can be driven to rotate, this implementation
Example middle gear 23 is horizontally placed on step 51, and such gear 23 is in step 51 and lower mounting bracket 2 and its shape of extension 24
Into a relative closure space in, be conducive to protecting transmission mechanism, and avoid gear 23 exposed, the safety of reduction device is steady
It is qualitative and attractive in appearance.
The bottom of rotating disk 5 is just to being provided with the projecting apparatus container 6 in space structure, and projecting apparatus container 6 passes through spiral shell
Bolt is detachably connected with it, and the upper lower wall and antetheca of projecting apparatus container 6 are all closed, and is provided with antetheca and supplies projector projects
Penetrate optical port 61, rear end is hinged with bonnet 63, and the bottom of bonnet 63 and the bottom wall of projecting apparatus container 6 are hinged, passed through with roof
Lock latch etc. is detachably connected, and the bottom of bonnet 63 is provided with the incoming line 62 for being available for circuit to pass in and out.
During installation, upper mounting bracket 1 is fixed on after the settling position on top, is installed and mutually fitted according to the size of projecting apparatus
The projecting apparatus container 6 answered, then by projecting apparatus after its rear wall is put into, then covers and completes.By controlling servomotor 4 to drive
Dynamic screw mandrel 11 is rotated, then can be achieved to complete the elevating control of elevating mechanism, adjust the launching position of projecting apparatus vertical direction, pass through
Control micro electric machine 22 can then control rotating disk to rotate, and projector projects light is adjusted circumferentially so as to realize.It is simple in construction,
Manufacture, which is installed, extremely to be facilitated, and financial cost is relatively low, using more longlasting.
Finally it should be noted that foregoing description is only preferred embodiment of the present utility model, the ordinary skill of this area
Personnel on the premise of without prejudice to the utility model objective and claim, can make a variety of under enlightenment of the present utility model
Similar expression, such conversion is each fallen within protection domain of the present utility model.
Claims (8)
1. a kind of adjustable projector hanger bracket, including upper mounting bracket (1), the lifting of lower mounting bracket (2) and connection between the two
Mechanism, it is characterised in that：The elevating mechanism includes connecting upper mounting bracket (1) respectively and the fork-shaped of lower mounting bracket (2) both sides is received
Contracting frame (3), the upper mounting bracket (1) is in hollow structure, and the first chute is provided with along long axis direction in the middle part of mounting bracket (1) on this
(11) screw mandrel (111), is provided with first chute (11), the screw mandrel (111) is slided provided with two and its screw thread coordinates first
Block (112), the thread rotary orientation of two first sliding blocks (112) is on the contrary, first chute (11) rear end is provided with and can driven
The servomotor (4) that screw mandrel (111) is rotated；
Upper mounting bracket (1) both sides are arranged with the second chute (12), two first sliding blocks (112) the company of being installed with
Bar (113), the end of the connecting rod (113) is installed with and second chute (12) mutually suitable the second sliding block (121), described the
Two sliding blocks (121) are slidably in embedded second chute (12)；
The position of lower mounting bracket (2) top both sides second chute of correspondence (12) is provided with slideway (21), the forked type retraction rack
(3) upper end both sides fulcrum is hinged with two second sliding blocks (121) respectively, and lower end both sides fulcrum is movably arranged on the cunning
In road (21), and it can be slid axially along it；
It is connected with rotating disk (5), the mounting bracket (2) is provided with the driving rotation lower mounting bracket (2) lower rotatable
The micro machine (22) of disk (5) rotation；
Rotating disk (5) bottom is detachably connected with projecting apparatus container (6).
2. adjustable projector hanger bracket according to claim 1, it is characterised in that：Set in the middle part of first chute (11)
There are two spacing block sets (114) along axisymmetrical and radial protrusion, the distance between two described spacing block sets (114) are less than
The width of first sliding block (112).
3. adjustable projector hanger bracket according to claim 1, it is characterised in that：Rotating disk (5) periphery is provided with
It is connected with engaging tooth, the power transmission shaft of the micro machine (22) and rotating disk (5) meshed gears (23).
4. adjustable projector hanger bracket according to claim 3, it is characterised in that：Rotating disk (5) top has
Step (51), the engaging tooth is arranged on the side of the step (51), and the gear (23) engages and in step (51)
On.
5. adjustable projector hanger bracket as claimed in any of claims 1 to 4, it is characterised in that：The lower peace
Shelve to rotate by the bearing pin (7) being vertically arranged between (2) and rotating disk (5) and be connected, bearing pin (7) top has first shaft shoulder
(71), bearing pin (7) the upper end end is provided with screw, and the lower mounting bracket (2) is fixedly mounted on first shaft shoulder (71) and pin
Between axle (7) upper end end, and locked with clamping screw (72)；
The rotating disk (5) is arranged on the bottom of the bearing pin (7), bearing pin (7) the lower end correspondence bearing by bearing (74)
(74) it is provided with second shaft shoulder (73).
6. adjustable projector hanger bracket as claimed in any of claims 1 to 4, it is characterised in that：The lower peace
Shelve (2) and be surrounded by the extension (24) extended downwardly for blocking rotating disk (5).
7. adjustable projector hanger bracket according to claim 6, it is characterised in that：The projecting apparatus container (6) is just
Rotating disk (5) bottom is installed, is detachably connected by bolt.
8. adjustable projector hanger bracket according to claim 7, it is characterised in that：The projecting apparatus container (6) is in
Hollow structure, front end is provided with optical port (61) is penetrated, and rear end is hinged with bonnet (63), and the bonnet (63) is provided with incoming line (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720021018.9U CN206478424U (en) | 2017-01-09 | 2017-01-09 | Adjustable projector hanger bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720021018.9U CN206478424U (en) | 2017-01-09 | 2017-01-09 | Adjustable projector hanger bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206478424U true CN206478424U (en) | 2017-09-08 |
Family
ID=59751140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720021018.9U Expired - Fee Related CN206478424U (en) | 2017-01-09 | 2017-01-09 | Adjustable projector hanger bracket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206478424U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514524A (en) * | 2017-09-21 | 2017-12-26 | 姚巧宁 | The control motion that a kind of projector position automatically adjusts |
| CN108386689A (en) * | 2018-03-30 | 2018-08-10 | 江西师范大学 | Wall-hanging study board |
| CN108468990A (en) * | 2018-03-12 | 2018-08-31 | 宁波中惠信息技术有限公司 | It is a kind of can automatic lifting lamp bracket |
| CN108644578A (en) * | 2018-06-18 | 2018-10-12 | 佛山市第七感文化传播有限公司 | A kind of light of stage mounting bracket |
| CN109707964A (en) * | 2019-02-26 | 2019-05-03 | 苏州盛迪通电子科技有限公司 | A kind of more projector suspension brackets |
| CN109798432A (en) * | 2019-02-26 | 2019-05-24 | 苏州盛迪通电子科技有限公司 | A kind of stealth projector suspension bracket |
| CN109882723A (en) * | 2019-04-02 | 2019-06-14 | 安徽理工大学 | An embedded wall-mounted installation device and wall-mounted device having the same |
| CN110230763A (en) * | 2019-07-23 | 2019-09-13 | 常州机电职业技术学院 | Formula TV set lift gallows system is watched to lying on back |
| CN110748765A (en) * | 2019-10-23 | 2020-02-04 | 浙江更土电子商务有限公司 | Dustproof height-adjustable's projecting apparatus |
| CN110848523A (en) * | 2019-12-05 | 2020-02-28 | 吉林师范大学 | Mobile geographic measurement mapping device |
| CN111193914A (en) * | 2020-01-10 | 2020-05-22 | 厦门卓旭智能科技有限公司 | Projector convenient to calibration projection position and good stability |
| CN111692493A (en) * | 2020-05-20 | 2020-09-22 | 广东华工工程建设监理有限公司 | Building construction supervision device based on BIM |
| CN112859493A (en) * | 2021-01-26 | 2021-05-28 | 徐州工程学院 | Household multifunctional projection device |
| CN114650403A (en) * | 2020-12-21 | 2022-06-21 | 广东博智林机器人有限公司 | Projection device and projection positioning equipment |
-
2017
- 2017-01-09 CN CN201720021018.9U patent/CN206478424U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514524A (en) * | 2017-09-21 | 2017-12-26 | 姚巧宁 | The control motion that a kind of projector position automatically adjusts |
| CN108468990B (en) * | 2018-03-12 | 2020-04-17 | 宁波中惠信息技术有限公司 | Lamp bracket capable of automatically lifting |
| CN108468990A (en) * | 2018-03-12 | 2018-08-31 | 宁波中惠信息技术有限公司 | It is a kind of can automatic lifting lamp bracket |
| CN108386689A (en) * | 2018-03-30 | 2018-08-10 | 江西师范大学 | Wall-hanging study board |
| CN108644578A (en) * | 2018-06-18 | 2018-10-12 | 佛山市第七感文化传播有限公司 | A kind of light of stage mounting bracket |
| CN109707964A (en) * | 2019-02-26 | 2019-05-03 | 苏州盛迪通电子科技有限公司 | A kind of more projector suspension brackets |
| CN109798432A (en) * | 2019-02-26 | 2019-05-24 | 苏州盛迪通电子科技有限公司 | A kind of stealth projector suspension bracket |
| CN109882723A (en) * | 2019-04-02 | 2019-06-14 | 安徽理工大学 | An embedded wall-mounted installation device and wall-mounted device having the same |
| CN109882723B (en) * | 2019-04-02 | 2024-02-23 | 安徽理工大学 | Embedded wall hanging installation device and wall hanging equipment with same |
| CN110230763A (en) * | 2019-07-23 | 2019-09-13 | 常州机电职业技术学院 | Formula TV set lift gallows system is watched to lying on back |
| CN110748765A (en) * | 2019-10-23 | 2020-02-04 | 浙江更土电子商务有限公司 | Dustproof height-adjustable's projecting apparatus |
| CN110748765B (en) * | 2019-10-23 | 2021-09-17 | 山东恒业似锦科技有限公司 | Dustproof height-adjustable's projecting apparatus |
| CN110848523A (en) * | 2019-12-05 | 2020-02-28 | 吉林师范大学 | Mobile geographic measurement mapping device |
| CN111193914A (en) * | 2020-01-10 | 2020-05-22 | 厦门卓旭智能科技有限公司 | Projector convenient to calibration projection position and good stability |
| CN111692493A (en) * | 2020-05-20 | 2020-09-22 | 广东华工工程建设监理有限公司 | Building construction supervision device based on BIM |
| CN114650403A (en) * | 2020-12-21 | 2022-06-21 | 广东博智林机器人有限公司 | Projection device and projection positioning equipment |
| CN112859493A (en) * | 2021-01-26 | 2021-05-28 | 徐州工程学院 | Household multifunctional projection device |
| CN112859493B (en) * | 2021-01-26 | 2022-05-13 | 徐州工程学院 | A home multifunctional projection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170908 Termination date: 20210109 |