CN201788349U - Angle regulating device of miniature projector - Google Patents

Angle regulating device of miniature projector Download PDF

Info

Publication number
CN201788349U
CN201788349U CN2010202880060U CN201020288006U CN201788349U CN 201788349 U CN201788349 U CN 201788349U CN 2010202880060 U CN2010202880060 U CN 2010202880060U CN 201020288006 U CN201020288006 U CN 201020288006U CN 201788349 U CN201788349 U CN 201788349U
Authority
CN
China
Prior art keywords
eccentric wheel
guide pillar
crane
projecting subassembly
rotary components
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 - Lifetime
Application number
CN2010202880060U
Other languages
Chinese (zh)
Inventor
金香云
高续赟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FOUNDER TECHNOLOGY GROUP Corp SUZHOU PRODUCT Co Ltd
Original Assignee
FOUNDER TECHNOLOGY GROUP Corp SUZHOU PRODUCT Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FOUNDER TECHNOLOGY GROUP Corp SUZHOU PRODUCT Co Ltd filed Critical FOUNDER TECHNOLOGY GROUP Corp SUZHOU PRODUCT Co Ltd
Priority to CN2010202880060U priority Critical patent/CN201788349U/en
Application granted granted Critical
Publication of CN201788349U publication Critical patent/CN201788349U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Commercial Cooking Devices (AREA)

Abstract

The utility model discloses an angle regulating device of a miniature projector, comprising a shell, a projection component, a lifting-connecting sheet and a rotating component, wherein the projection component comprises a projection module and a projection module support which are connected rotatably; the rotating component comprises an eccentric wheel fixing frame and an eccentric wheel, wherein the eccentric wheel fixing frame is provided with a through hole adapting to an inner cylinder of the eccentric wheel, the inner cylinder of the eccentric wheel extends out of the eccentric wheel fixing frame, and the eccentric wheel fixing frame is fixed in the shell; the projection component, the lifting-connecting sheet and the rotating component are arranged in the shell; the lifting-connecting sheet is arranged between the projection component and the rotating component; the upper end of the lifting-connecting sheet is contacted with the projection component; and the lower end of the lifting-connecting sheet is contacted with an outer wheel of the eccentric wheel. The rotating component is provided with the eccentric wheel, and the inner cylinder of the eccentric wheel can be rotated to drive the outer wheel to rotate and further drive the projection component to lift up and down, thus achieving the effect of regulating the projection angle.

Description

A kind of angular adjustment apparatus of micro projector
Technical field
The utility model relates to a kind of angular adjustment apparatus of micro projector.
Background technology
Because existing projection computer projection lens is fixed on the projection computer, the projection angle governor motion that does not have projection lens, need use projection computer on projection screen during projection the user, the position or the angle that just need to adjust whole projection computer adapt to projection screen, submit a written statement to a higher authority or pad as between projection computer and supporting desktop, filling up, perhaps change supporting desktop, however, owing to be limited by books, the thickness of pad and desktop or height, for some tiny angular adjustment, with regard to difficult realizing, thereby cause not reaching suitable imaging angle and influence the user and watch projected image.
Summary of the invention
Technical matters to be solved by this invention is: at the shortcoming that above prior art exists, propose a kind of angular adjustment apparatus of micro projector, can solve the problem that existing micro projector can not be regulated projection angle.
The technical scheme that the utility model solves above technical matters is: a kind of angular adjustment apparatus of micro projector comprises shell, projecting subassembly, lifting brace, rotary components;
Projecting subassembly comprises the projection module and the projection module props up, between projective module pack support and the projection module for being rotationally connected;
Rotary components comprises eccentric wheel fixed mount and eccentric wheel, on the eccentric wheel fixed mount, be provided with eccentric in the through hole that adapts of cylinder, the interior cylinder of eccentric wheel stretches out from the eccentric wheel fixed mount, the eccentric wheel fixed mount is fixed in the shell;
Projecting subassembly, lifting brace and rotary components place in the shell, and the lifting brace is arranged between projecting subassembly and the rotary components, and the upper end of lifting brace contacts with projecting subassembly, and the lower end that lifting connects contacts with eccentric foreign steamer.
Owing to be provided with eccentric wheel on the rotary components, by rotating eccentric interior cylinder, thereby can drive foreign steamer rotates, because interior cylinder and foreign steamer are eccentric structure, and lifting brace lower end contacts with eccentric foreign steamer, the upper end contacts with projecting subassembly, therefore the rotation of cylinder can cause the oscilaltion of lifting brace in, thereby drive projecting subassembly, with the place of being rotationally connected between projective module pack support and the projection module is that rotate in the center of circle, and the rotation of projecting subassembly has just reached the effect of adjusting projection angle.
As another technical scheme of the utility model, its technical scheme is as follows:
A kind of angular adjustment apparatus of micro projector comprises: shell, projecting subassembly, lifting assembly and rotary components;
Projecting subassembly comprises projection module and projective module pack support, between projective module pack support and the projection module for being rotationally connected;
Rotary components comprises eccentric wheel fixed mount and eccentric wheel, on the eccentric wheel fixed mount, be provided with eccentric in the through hole that adapts of cylinder, eccentric interior cylinder stretches out from the eccentric wheel fixed mount, the eccentric wheel fixed mount is fixed in the shell;
Lifting assembly comprises crane, universal wheel base, universal wheel, universal wheel cap, and the universal wheel base is arranged between crane and universal wheel, and universal wheel cap is arranged at the universal wheel outside, and universal wheel cap inside is set to the shape that adapts with the universal wheel outside;
Projecting subassembly, lifting assembly, rotary components are arranged in the shell, the crane inwall contacts with the foreign steamer of rotary components, projecting subassembly bottom is set to the shape that adapts with universal wheel, and the universal wheel upper part of lifting assembly is positioned at the die cavity of projecting subassembly bottom.
Same, owing to be provided with eccentric wheel on the rotary components, by rotating eccentric interior cylinder, thereby can drive foreign steamer rotates, because interior cylinder foreign steamer eccentric structure, and the crane inwall contacts with the foreign steamer of rotary components, the rotation of interior cylinder will make crane move up and down, crane move up and down by with the contacted universal wheel structure of projecting subassembly, driving projecting subassembly synchronously is that rotate in the center of circle with the place of being rotationally connected between projective module pack support and the projection module, and the rotation of projecting subassembly has just reached the effect of adjusting projection angle.
As to the further improved technical scheme of the utility model, being rotationally connected between projective module pack support and the projection module can be by realizing as lower device:
In projective module pack support two sides groove is set all, and at groove stator under the module is set, at the projection module 1 or 2 rotating shafts are set, rotating shaft is inserted in the groove of projective module pack support, will go up stator and following stator contraposition assembling.
Also comprise the guide pillar support, for being slidingly connected, the guide pillar support is fixed in the shell between guide pillar support and the crane.By the guide pillar support being set, easier remaining on the vertical direction when crane moves up and down.
Being slidingly connected in the crane both sides guide pillar through hole being set all between guide pillar support and the crane is provided with the guide pillar fixed orifice at guide pillar support correspondence position, and guide pillar passes the guide pillar through hole and is installed on the guide pillar support.
Knob can also be set on rotary components, and knob is passed in the eccentric wheel fixed mount and is connected with eccentric interior cylinder.
Buckle and die cavity can also be set on described knob, and in die cavity, pack into spring and steel ball, corresponding draw-in groove is set on the cylinder in eccentric.
Can also towards eccentric one side U type groove be set at described knob, the gear bar be set at interior cylinder and knob one side in opposite directions.
Can also ball be set in the both sides up and down that crane contacts with foreign steamer, crane up and down relative position place, both sides is set to the shape that adapts with the ball outer wall.
Description of drawings
Fig. 1 is the synoptic diagram of a kind of embodiment of the utility model;
Fig. 2 is the synoptic diagram of the another kind of embodiment of the utility model;
Fig. 3 is the projecting subassembly explosive view among Fig. 1 and Fig. 2;
Fig. 4 is the explosive view of the lifting assembly among Fig. 2;
Fig. 5 is the rotary components explosive view among Fig. 1 and Fig. 2 among Fig. 2;
Fig. 6 is the reverse direction synoptic diagram of Fig. 5;
Embodiment
In order to understand essence of the present utility model better, following examples are described in detail the utility model in conjunction with the accompanying drawings.
Fig. 1 is a kind of synoptic diagram of first kind of embodiment of angular adjustment apparatus of micro projector, has comprised among the figure: shell 2, projecting subassembly 3, lifting brace 4, rotary components 5; In addition in conjunction with Fig. 3 as can be seen: projecting subassembly 3 comprises projection module 301, projective module pack support 302, between projective module pack support 302 and the projection module 301 for being rotationally connected, the mode of being rotationally connected that Fig. 3 provides is: in projective module pack support 302 two sides groove 303 is set all, and stator 304 under the module is being set on the groove 303, at projection module 301 rotating shaft 305 is set, pass the groove 303 of projective module pack support 302 in rotating shaft 305 after, to go up stator 306 and following stator 304 contrapositions assembling, thus, projection module 301 can be by rotating in the space of rotating shaft 305 between last stator 306 and following stator 304, and the center of circle of its rotation is rotating shaft 305.Rotating shaft 305 can be set to one or 2, a rotating shaft is set directly passes projection module 301 for this rotating shaft, 2 rotating shafts is set at groove 303 places of both sides a rotating shaft to be set respectively.
Fig. 1 is in conjunction with Fig. 5 as can be seen: rotary components 5 comprises eccentric wheel fixed mount 501 and eccentric wheel 502, the through hole that the interior cylinder 503 of setting and eccentric wheel 502 adapts on eccentric wheel fixed mount 501, the interior cylinder 503 of eccentric wheel 502 stretches out from eccentric wheel fixed mount 501, and eccentric wheel fixed mount 501 is fixed in the shell 2;
In conjunction with Fig. 1, Fig. 3 and Fig. 5, projecting subassembly 3, lifting brace 4, rotary components 5 are arranged in the shell 2, lifting brace 4 is arranged between projecting subassembly 3 and the rotary components 5, the upper end of lifting brace 4 contacts with projecting subassembly 3, and the lower end of lifting brace 4 contacts with the foreign steamer 504 of eccentric wheel 502.
Owing to be provided with eccentric wheel 502 on the rotary components 5, by rotating the interior cylinder 503 of eccentric wheel 502, thereby can drive foreign steamer 504 rotates, because interior cylinder 503 and foreign steamer 504 are eccentric structure, and lifting brace 4 lower ends contact with the foreign steamer 504 of eccentric wheel 502, the upper end contacts with projecting subassembly, therefore the rotation of cylinder 503 can cause 4 oscilaltions of lifting brace in, thereby driving projecting subassembly 3 is that rotate in the center of circle with the place of being rotationally connected between projective module pack support (302) and the projection module 301, and the rotation of projecting subassembly 3 has just reached the effect of adjusting projection angle.
The technical scheme of another that the utility model provides comprises in Fig. 2 as shown in Figure 2: shell 2, projecting subassembly 3, lifting assembly 7, rotary components 5.
Fig. 2 is in conjunction with Fig. 3 as can be seen: projecting subassembly 3 comprises between projection module 301, projective module pack support (302), projective module pack support 302 and the projection module 301 for being rotationally connected.Its mode that is rotationally connected is identical with embodiment one.
Fig. 2 is in conjunction with Fig. 4 as can be seen: rotary components 5 comprises eccentric wheel fixed mount 501 and eccentric wheel 502, the through hole that the interior cylinder 503 of setting and eccentric wheel 502 adapts on eccentric wheel fixed mount 501, the interior cylinder 503 of eccentric wheel 502 stretches out from eccentric wheel fixed mount 501, and eccentric wheel fixed mount 501 is fixed in the shell 2.
Fig. 2 is in conjunction with Fig. 5 as can be seen: lifting assembly 7 comprises crane 701, universal wheel base 702, universal wheel 703, universal wheel cap 704, universal wheel base 702 is arranged between crane 701 and the universal wheel 703, universal wheel cap 704 is arranged at universal wheel 703 outsides, and universal wheel cap 704 inside are set to the shape that adapts with universal wheel 703 outsides.
Fig. 2 is in conjunction with Fig. 3, Fig. 4, Fig. 5, projecting subassembly 3, lifting assembly 7, rotary components 5 are arranged in the shell 2, foreign steamer 504 tangent planes of crane 701 inwalls and rotary components 5 intersect, projecting subassembly 3 bottoms are set to the shape that adapts with universal wheel, and universal wheel 703 upper parts of lifting assembly 7 are positioned at the die cavity 307 of projecting subassembly 3 bottoms.
Same, owing to be provided with eccentric wheel 502 on the rotary components 5, by rotating the interior cylinder 503 of eccentric wheel 502, thereby can drive foreign steamer 504 rotates, because interior cylinder 503 and foreign steamer 504 are eccentric structure, and foreign steamer 504 tangent planes of crane 701 inwalls and rotary components 5 intersect, the rotation of interior cylinder 503 will make crane 701 move up and down, crane 701 move up and down by with projecting subassembly 3 contacted universal wheel structures, driving projecting subassembly 3 synchronously is that rotate in the center of circle with the place of being rotationally connected between projective module pack support 302 and the projection module 301, and the rotation of projecting subassembly 3 has just reached the effect of adjusting projection angle.
In order better to guarantee crane 701 energy in the vertical direction oscilaltions, guide pillar support 8 (see figure 4)s can also be set, for being slidingly connected, the guide pillar support is fixed in the shell 2 between guide pillar support 8 and the crane 701.By guide pillar support 8 being set, easier remaining on the vertical direction when crane moves up and down.
Slidely connecting between guide pillar support 8 and the crane 701 is multiple, connected mode among Fig. 4 is for all being provided with guide pillar through hole 706 in crane 701 both sides, correspondence position is provided with the guide pillar fixed orifice on guide pillar support 8, and guide pillar 705 passes guide pillar through hole 706 and is installed on the guide pillar support 8.Otherwise, guide pillar is set on crane, setting causes through hole also passable on the guide pillar support.
For the user's rotation of being more convenient for, as shown in Figure 5, knob 506 can also be set on rotary components 5, knob 506 is passed in eccentric wheel fixed mount 501 and is connected with the interior cylinder 503 of eccentric wheel 502, connected mode has multiple, can connect by screw, also can adopt following mode to connect.
Fig. 5 is in conjunction with Fig. 6, buckle 507 and die cavity 509 can also be set on knob 506, and in die cavity 509, pack into spring 510 and steel ball 511, corresponding draw-in groove 508 is set on the interior cylinder 503 of eccentric wheel 502, in the draw-in groove 508 in buckle 507 snaps on the cylinder 503, after pressing knob 506, spring 510 pressurizeds shorten, in the process of knob 506 rotations, rely on the power between buckle 507 sides and draw-in groove 508 sides to drive eccentric wheel 502 rotations synchronously, thereby realized the height of projection module 3 is regulated.
Rotation for the eccentric wheel 502 of being more convenient for, can also towards the one side of eccentric wheel 502 U type groove 512 be set at knob 506, cylinder 503 is provided with gear bar 513 with knob 506 one side in opposite directions in described, gear bar 513 just in time snaps in the U type groove 512, after pressing knob 506 and rotation, need be by the power between buckle 507 and the draw-in groove 508, but utilize screens between gear bar 513 and the U type groove 512 to realize the rotation of eccentric wheel 502.
For linking up and precision smooth and easy and that projection module 301 rises of the rotation that guarantees foreign steamer 504, can also can also ball 707 be set in the both sides up and down 708,709 that crane 701 contacts with foreign steamer 504, crane is set to the shape that adapts with ball 707 outer walls in relative position place in both sides about in the of 701, and ball 707 contacts with foreign steamer 504.
The utility model is not limited to the foregoing description, with the identical or akin technical scheme of the technical characterictic of the foregoing description, also belongs to the protection domain of the utility model requirement.

Claims (9)

1. the angular adjustment apparatus of a micro projector is characterized in that: comprise shell (2), projecting subassembly (3), lifting brace (4) and rotary components (5);
Described projecting subassembly (3) comprises projection module (301) and projective module pack support (302), between described projective module pack support (302) and the projection module (301) for being rotationally connected;
Described rotary components (5) comprises eccentric wheel fixed mount (501) and eccentric wheel (502), the through hole that the interior cylinder (503) of setting and eccentric wheel (502) adapts on eccentric wheel fixed mount (501), the interior cylinder (503) of eccentric wheel (502) stretches out from eccentric wheel fixed mount (501), and eccentric wheel fixed mount (501) is fixed in the shell (2);
Described projecting subassembly (3), lifting brace (4) and rotary components (5) are arranged in the shell (2), lifting brace (4) is arranged between projecting subassembly (3) and the rotary components (5), the upper end of lifting brace (4) contacts with projecting subassembly (3), and the lower end of lifting brace (4) contacts with the foreign steamer (504) of eccentric wheel (502).
2. the angular adjustment apparatus of a micro projector is characterized in that: comprise shell (2), projecting subassembly (3), lifting assembly (7) and rotary components (5);
Described projecting subassembly (3) comprises projection module (301) and projective module pack support (302), between described projective module pack support (302) and the projection module (301) for being rotationally connected;
Described rotary components (5) comprises eccentric wheel fixed mount (501) and eccentric wheel (502), the through hole that the interior cylinder (503) of setting and eccentric wheel (502) adapts on eccentric wheel fixed mount (501), the interior cylinder (503) of eccentric wheel (502) stretches out the eccentric wheel fixed mount from eccentric wheel fixed mount (501)
(501) be fixed in the shell (2);
Described lifting assembly (7) comprises crane (701), universal wheel base (702), universal wheel (703) and universal wheel cap (704), universal wheel base (702) is arranged between crane (701) and the universal wheel (703), universal wheel cap (704) is arranged at universal wheel (703) outside, the shape that universal wheel cap (704) inside is set to and universal wheel (703) outside adapts;
Described projecting subassembly (3), lifting assembly (7) and rotary components (5) are arranged in the shell (2), crane (701) inwall contacts with the foreign steamer (504) of rotary components (5), projecting subassembly (3) bottom is set to the shape that adapts with universal wheel, and universal wheel (703) upper part of lifting assembly (7) is positioned at the die cavity (307) of projecting subassembly (3) bottom.
3. the angular adjustment apparatus of micro projector according to claim 1 and 2 is characterized in that: being rotationally connected by realizing as lower device between described projective module pack support (302) and the projection module (301):
In projective module pack support (302) two sides groove (303) is set all, and stator under the module (304) is set on groove (303), at projection module (301) 1 or 2 rotating shafts (305) are set, rotating shaft (305) is inserted in the groove (303) of projective module pack support (302), will go up stator (306) and following stator (304) contraposition assembling.
4. the angular adjustment apparatus of micro projector according to claim 1 and 2, it is characterized in that: knob (506) is set on rotary components (5), knob (506) passes eccentric wheel fixed mount (501), is connected with the interior cylinder (503) of eccentric wheel (502).
5. the angular adjustment apparatus of micro projector according to claim 4, it is characterized in that: buckle (507) and die cavity (509) are set on described knob (506), and in die cavity (509), pack into spring (510) and steel ball (511), spring (510) and steel ball (511) are arranged in the die cavity (509), on the interior cylinder (503) of eccentric wheel (502) corresponding draw-in groove (508) are set.
6. the angular adjustment apparatus of micro projector according to claim 5, it is characterized in that: towards the one side of eccentric wheel (502) U type groove (512) is set at described knob (506), cylinder in described (503) is provided with gear bar (513) with knob (506) one side in opposite directions.
7. the angular adjustment apparatus of micro projector according to claim 2, it is characterized in that: also comprise guide pillar support (8), for being slidingly connected, guide pillar support (8) is fixed in the shell (2) between guide pillar support (8) and the crane (701).
8. the angular adjustment apparatus of micro projector according to claim 7, it is characterized in that: being slidingly connected between described guide pillar support (8) and the crane (701) to guide pillar through hole (706) all being set in crane (701) both sides, go up correspondence position at guide pillar support (8) the guide pillar fixed orifice is set, guide pillar (705) passes guide pillar through hole (706) and is installed on the guide pillar support (8).
9. the angular adjustment apparatus of micro projector according to claim 8, it is characterized in that: also comprise ball (707), described ball (707) is arranged at the both sides up and down (708,709) that crane (701) contacts with foreign steamer (504), described crane (701) shape that relative position place in both sides is set to and ball (707) outer wall adapts up and down.
CN2010202880060U 2010-08-11 2010-08-11 Angle regulating device of miniature projector Expired - Lifetime CN201788349U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010202880060U CN201788349U (en) 2010-08-11 2010-08-11 Angle regulating device of miniature projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010202880060U CN201788349U (en) 2010-08-11 2010-08-11 Angle regulating device of miniature projector

Publications (1)

Publication Number Publication Date
CN201788349U true CN201788349U (en) 2011-04-06

Family

ID=43820307

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010202880060U Expired - Lifetime CN201788349U (en) 2010-08-11 2010-08-11 Angle regulating device of miniature projector

Country Status (1)

Country Link
CN (1) CN201788349U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102830289A (en) * 2012-08-27 2012-12-19 北京无线电计量测试研究所 Novel system for quickly calibrating field uniformity of transient electromagnetic field
CN107479304A (en) * 2017-07-04 2017-12-15 芜湖迈特电子科技有限公司 Feature-rich micro projector
CN110427113A (en) * 2019-07-10 2019-11-08 深圳市恒怡多精彩科技有限公司 Keyboard with projecting function
CN110778879A (en) * 2019-11-28 2020-02-11 歌尔科技有限公司 Camera telescopic rotating mechanism and wearing type intelligent equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102830289A (en) * 2012-08-27 2012-12-19 北京无线电计量测试研究所 Novel system for quickly calibrating field uniformity of transient electromagnetic field
CN102830289B (en) * 2012-08-27 2014-09-17 北京无线电计量测试研究所 Novel system for quickly calibrating field uniformity of transient electromagnetic field
CN107479304A (en) * 2017-07-04 2017-12-15 芜湖迈特电子科技有限公司 Feature-rich micro projector
CN110427113A (en) * 2019-07-10 2019-11-08 深圳市恒怡多精彩科技有限公司 Keyboard with projecting function
CN110427113B (en) * 2019-07-10 2024-05-28 安庆市恒怡多精彩科技有限公司 Keyboard with projection function
CN110778879A (en) * 2019-11-28 2020-02-11 歌尔科技有限公司 Camera telescopic rotating mechanism and wearing type intelligent equipment

Similar Documents

Publication Publication Date Title
CN101943846B (en) Miniature projector with projection angle regulation device
CN201788349U (en) Angle regulating device of miniature projector
CN104251372A (en) Support device
CN208775766U (en) A kind of turnover mechanism of miniature detection machine
CN102135710A (en) Optical adjusting device for micro-projector
WO2021072823A1 (en) Photography apparatus, electronic device, and method for using electronic device
CN104380192B (en) Camera module
CN109191937A (en) Multimedia education system
CN101615056B (en) Computer with projecting device
CN109442157A (en) A kind of positioning device of computer hardware
CN211319654U (en) Visual transmission design display device capable of rotating in layered mode
CN210166686U (en) All-in-one with adjustable binocular camera
CN209041154U (en) Remote control type oscillating fan structure and fan
CN208388972U (en) Novel traction massage pillow
CN216742691U (en) Automatic centering device
CN201654424U (en) Optical adjusting device of miniature projector
CN206299965U (en) A kind of mounting bracket of 3D device for filming image
CN110469755A (en) A kind of display device
CN205516484U (en) Shoot balloon
CN201174024Y (en) Fresnel lens trapezium correcting electric regulating apparatus of projector
CN219623636U (en) Man-machine interaction equipment supporting device
CN220816250U (en) Biaxial hinge and folding terminal of flexible screen can be folded to water droplet shape
CN221348630U (en) Portable LED display screen installing frame
CN211821610U (en) Computer display screen linkage is used in teaching convenient to adjust
CN209961209U (en) Theodolite with rotating structure and convenient for adjusting visual angle

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20110406

Effective date of abandoning: 20120328