CN210691026U - DLP projector core variable focal length device - Google Patents
DLP projector core variable focal length device Download PDFInfo
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- CN210691026U CN210691026U CN201922028939.XU CN201922028939U CN210691026U CN 210691026 U CN210691026 U CN 210691026U CN 201922028939 U CN201922028939 U CN 201922028939U CN 210691026 U CN210691026 U CN 210691026U
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Abstract
The utility model relates to the field of focus adjustment of projectors, in particular to a DLP projector movement variable focus device, which comprises a projector body, a frame, a first linear driving mechanism, a speed reducing mechanism and a second linear driving mechanism; the projector comprises a projector body, a rack, a first linear driving mechanism, a speed reducing mechanism, a second linear driving mechanism and a second linear driving mechanism, wherein the rack is fixedly arranged on the projector body, the projector body is provided with a linearly moving zooming control rod for adjusting focal length, the first linear driving mechanism is fixedly arranged on the rack, a driving assembly is in sliding connection with the side wall of the rack, the output end of the first linear driving mechanism is in transmission connection with the input end of the speed reducing mechanism, one end of the speed reducing mechanism is fixedly arranged on the rack, the other end of the speed reducing mechanism is in transmission connection with the second linear driving mechanism; according to the technical scheme, the problem that the zooming cost of the traditional projector is high is solved, the mechanical efficiency is high, the labor is saved, the feedback is clear, and the control is accurate.
Description
Technical Field
The utility model relates to a focus adjustment field of projecting apparatus specifically is a device of zooming of DLP projection core is related to.
Background
The focus adjustment belongs to a micro-distance adjustment, namely, the focus is adjusted in a small range with high precision. In a precision projector, in order to ensure high-precision adjustment, the stroke of the focal length adjustment member is generally small, so that the requirement on related personnel is high, and further, the operation is inconvenient.
The prior art adjustment mechanisms are typically complex. For example, chinese patent application publication CN202815403U discloses a high-precision projector focal length adjustment device, wherein the high-precision projector focal length adjustment device includes a projector housing, an optical head housing is disposed in the projector housing, an optical lens is disposed in the optical head housing, a lens sleeve is disposed on the optical head housing, a guide groove is disposed in the lens sleeve, a guide rib is disposed on the optical lens and matched with the guide groove, optical ring support rings are disposed on the optical head housing and the lens sleeve, and the central lines of the two optical ring support rings are mutually overlapped, a threaded rod is sleeved in the two optical ring support rings and can rotate relatively, an adjustment knob is disposed at one end of the threaded rod close to the outer side of the projector housing, a positioning bolt is connected to the threaded rod by a thread, the positioning bolt is composed of a circular ring with an internal thread and a cylinder with an external thread, the circular ring is connected to the threaded rod, the cylinder is in threaded connection with a threaded hole formed in the optical lens. Although this mechanism can realize a high-precision focus adjustment of the focus adjustment device for a projector. However, such a device is too complicated to adjust, has too high production cost, is complex to assemble and debug, and has high process cost.
Therefore, the high-precision focal length adjusting mechanism which is simple in structure and convenient to operate has positive significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a DLP projector core device of zooming can be provided, this technical scheme has solved traditional projector and has zoomed problem with high costs, and mechanical efficiency is high, and is more laborsaving, and the feedback is more clear, and control is more accurate.
In order to solve the technical problem, the utility model provides a following technical scheme:
a DLP projector movement variable focal length device is characterized by comprising a projector body, a frame, a first linear driving mechanism, a speed reducing mechanism and a second linear driving mechanism;
the frame fixed mounting is on the projector body, be equipped with the linear motion's of adjusting focus control lever that zooms on the projector body, first linear drive mechanism fixed mounting in the frame and drive assembly and frame lateral wall sliding connection, first linear drive mechanism output is connected with reduction gears input transmission, reduction gears one end fixed mounting in the frame and the other end is connected with the transmission of second linear drive mechanism, the other end of second linear drive mechanism one end fixed mounting in the frame and the control lever fixed connection that zooms of projector body.
As a preferred scheme of a DLP projector movement variable focal length device, a first linear driving mechanism comprises a sliding chute, a driving cross rod, a first guiding sliding rail, a first rack and a holding handle; the sliding groove is formed in a side plate of the rack, the axis of the length direction of the side plate of the rack is parallel to the length direction of the side plate of the rack, the driving cross rod is connected with the sliding groove in a sliding mode and perpendicular to the sliding groove, the driving cross rod is fixedly connected with the first rack, the first guide sliding rail is fixedly installed on the bottom surface of the rack, the axis of the length direction of the first guide sliding rail is parallel to the length direction of the side plate of the rack, the first rack is connected with the first guide sliding rail in a sliding mode, and the holding handle and one end, far away from the first guide sliding rail, of.
As a preferred scheme of the DLP projector movement variable focal length device, the first linear driving mechanism is also provided with a locking assembly, and the locking assembly comprises a tooth socket, a supporting plate, a bolt, a spring, a pressing plate and a second rack; the tooth's socket is seted up at the grip handle end, tooth's socket length direction axis is parallel with drive horizontal pole direction of motion, backup pad fixed mounting is in the one side that projector body direction was kept away from to the frame curb plate, the bolt symmetry with backup pad clearance fit, clamp plate fixed connection is close to the one end of grip handle direction at the bolt, the spring cup joints on the bolt and between backup pad and clamp plate, second rack fixed mounting is parallel at one side and length direction axis of backup pad orientation grip handle direction with tooth's socket length direction axis, second rack and tooth's socket can mesh and extrude the clamp plate to the backup pad direction when the grip handle is rotatory.
As a preferred scheme of the variable focal length device of the DLP projector movement, the speed reducing mechanism comprises a first roller shaft, a first gear, a second roller shaft, a third gear and a fourth gear; the first gear is in transmission connection with the first linear driving mechanism, one ends of the first roller shaft and the second roller shaft are in clearance fit with one side of the rack side plate close to the projector body, the axis direction of the first gear is perpendicular to the rack side plate, the first gear and the second gear are fixedly sleeved on the first roller shaft, the third gear and the fourth gear are fixedly sleeved on the second roller shaft, the second gear is meshed with the third gear, the diameter of the second gear is smaller than that of the first gear, the diameter of the fourth gear is smaller than that of the third gear, the diameter of the second gear is smaller than that of the third gear, and the fourth gear is in transmission connection with the second linear driving mechanism.
As a preferable scheme of the DLP projector core variable focal length device, the speed reducing mechanism also comprises a damper and a fourth gear; the damper is fixedly installed on one side, close to the direction of the projector body, of the rack side plate, the axis of the damper is perpendicular to the rack side plate, the counter bores are evenly and circumferentially distributed on one side, close to the rack side plate, of the first gear, and the damper is in interference fit with the counter bores.
As a preferable scheme of the variable focal length device of the DLP projector core, the second linear driving mechanism comprises a second guide sliding rail and a third rack; the second guide slide rail is fixedly installed on the bottom plate of the rack, the axis of the second guide slide rail in the length direction is parallel to the movement direction of the zooming control rod of the projector body, the third rack is connected with the second guide slide rail in a sliding mode, and the third rack is connected with the output end of the speed reducing mechanism in a transmission mode and is fixedly connected with the zooming control rod of the projector body.
Compared with the prior art, the utility model beneficial effect who has is:
when the focal length of the projector body needs to be adjusted, a control assembly of the first linear driving mechanism is pushed and pulled manually, the other end of the first linear driving mechanism drives an input end of a speed reducing mechanism in transmission connection with the first linear driving mechanism to convert a linear square force into a rotary torque, the input end of the speed reducing mechanism transmits the torque to an output end, the displacement distance is reduced through mutual meshing and transmission of internal gears, so that the control is more accurate and labor-saving, the output end of the speed reducing mechanism transmits the torque to a second linear driving mechanism, so that the rotary torque is changed into a linear force again, the output end of the second linear driving mechanism pulls a zooming control rod of the projector body fixedly connected with the output end of the second linear driving mechanism to adjust the focal length, when the projector body does not need to be focused, a worker rotates a holding handle around a hinged part and pushes a pressing plate, the pressing plate approaches towards the direction of a supporting plate along the axial, receive the effect clamp plate oppression second rack of spring and tooth's socket to closely cooperate and make the handle of gripping lock dead in the horizontal direction, because be provided with the bolt, the horizontal direction's deflection can not take place for clamp plate self, has guaranteed stability, when first gear is rotatory, counter bore on the first gear takes place interference fit with the one end that the attenuator is close to projector body direction in proper order, and the power on the attenuator produces the change and feeds back control personnel with the motion state to further make things convenient for the accurate control of control personnel to zoom.
1. The mechanical efficiency is high, and the labor is saved;
2. the feedback is clearer, and the control is more accurate;
3. simple structure and low cost.
Drawings
Fig. 1 is a first perspective view of the present invention;
fig. 2 is a first perspective view of the projector body according to the present invention;
fig. 3 is a second perspective view of the projector body according to the present invention;
fig. 4 is a front view of the projector body of the present invention;
FIG. 5 is a left side view of the projector body of the present invention;
FIG. 6 is a right side view of the projector body of the present invention;
fig. 7 is a plan view of the projector body according to the present invention.
The reference numbers in the figures are:
1. a projector body;
2. a frame;
3. a first linear drive mechanism; 3a, a chute; 3b, driving the cross rod; 3c, a first guide rail; 3d, a first rack; 3e, holding a handle; 3f, a locking component; 3f1, gullets; 3f2, support plate; 3f3, bolt; 3f4, spring; 3f5, press plate; 3f6, second rack;
4. a speed reduction mechanism; 4a, a first roller shaft; 4b, a first gear; 4c, a second gear; 4d, a second roller shaft; 4e, a third gear; 4f, a fourth gear; 4g, a damper; 4h, counter bores;
5. a second linear drive mechanism; 5a, a second guide slide rail; 5b and a third rack.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 to 7, a DLP projector core variable focal length device includes a projector body 1, a frame 2, a first linear driving mechanism 3, a speed reducing mechanism 4 and a second linear driving mechanism 5;
When the focal length of the projector body 1 needs to be adjusted, the control assembly of the first linear driving mechanism 3 is pushed and pulled manually, the other end of the first linear driving mechanism 3 drives the input end of the speed reducing mechanism 4 in transmission connection with the first linear driving mechanism to convert the linear square force into the rotary torque, the input end of the speed reducing mechanism 4 transmits the torque to the output end and reduces the displacement distance through the mutual meshing and transmission of internal gears to enable the control to be more accurate, the output end of the speed reducing mechanism 4 transmits the torque to the second linear driving mechanism 5 to enable the rotary torque to be changed into the linear force again, and the output end of the second linear driving mechanism 5 pulls the zoom control rod of the projector body 1 fixedly connected with the second linear driving mechanism to achieve the adjustment of the focal length.
The first linear driving mechanism 3 comprises a chute 3a, a driving cross rod 3b, a first guiding slide rail 3c, a first rack 3d and a holding handle 3 e; the utility model discloses a frame, including frame 2 curb plate, drive horizontal pole 3a, drive horizontal pole 3b and 3a sliding connection of spout and perpendicular to spout 3a, drive horizontal pole 3b and first rack 3d fixed connection, first guide slide rail 3c fixed mounting is on 2 bottom surfaces of frame, first guide slide rail 3c length direction axis is parallel with 2 curb plate length direction of frame, first rack 3d and first guide slide rail 3c sliding connection, the surface of revolution that the articulated position of the articulated one end hinge of keeping away from first guide slide rail 3c of grip handle 3e and drive horizontal pole 3b is perpendicular with drive horizontal pole 3b direction of motion.
When the focal length of the projector body 1 is not required to be adjusted, the holding handle 3e is upwards rotated along the hinged position to save space, the projector body 1 is rotated to be in the collinear position of the axis direction and the driving cross rod 3b when the focal length is adjusted, then the driving cross rod 3b is driven to slide in the sliding groove 3a through the push-pull projector body 1, the other end of the driving cross rod 3b drives the first rack 3d to do linear motion along the first guiding sliding rail 3c, and the first rack 3d drives the input end of the speed reducing mechanism 4 to move together to convert the linear motion into rotary motion.
The first linear driving mechanism 3 is also provided with a locking assembly 3f, and the locking assembly 3f comprises a tooth groove 3f1, a supporting plate 3f2, a bolt 3f3, a spring 3f4, a pressure plate 3f5 and a second rack 3f 6; the tooth groove 3f1 is arranged at the tail end of the holding handle 3e, the longitudinal axis of the tooth groove 3f1 is parallel to the moving direction of the driving cross bar 3b, the supporting plate 3f2 is fixedly arranged at one side of the side plate of the machine frame 2 far away from the projector body 1, the bolt 3f3 is symmetrically in clearance fit with the supporting plate 3f2, the pressing plate 3f5 is fixedly connected to one end of the bolt 3f3 close to the holding handle 3e direction, the spring 3f4 is sleeved on the bolt 3f3 and is arranged between the supporting plate 3f2 and the pressing plate 3f5, the second rack 3f6 is fixedly arranged at one side of the supporting plate 3f2 facing the holding handle 3e direction, the longitudinal axis is parallel to the longitudinal axis of the tooth groove 3f1, and the second rack 3f6 can be meshed with the tooth groove 3f1 and can press the pressing plate 3f5 to the supporting plate 3.
When the projector body 1 does not need to be focused, a worker rotates the holding handle 3e around the hinge portion and pushes the pressing plate 3f5, the pressing plate 3f5 approaches to the supporting plate 3f2 along the axis direction of the bolt 3f3 to enable the second rack 3f6 to be clamped in the tooth groove 3f1 on the holding handle 3e, the pressing plate 3f5 is pressed by the spring 3f4 to enable the second rack 3f6 and the tooth groove 3f1 to be tightly matched to enable the holding handle 3e to be locked in the horizontal direction, and due to the arrangement of the bolt 3f3, the pressing plate 3f5 cannot deflect in the horizontal direction, and stability is guaranteed.
The speed reducing mechanism 4 comprises a first roller shaft 4a, a first gear 4b, a second gear 4c, a second roller shaft 4d, a third gear 4e and a fourth gear 4 f; the first gear 4b is in transmission connection with the first linear driving mechanism 3, one ends of the first roller shaft 4a and the second roller shaft 4d are in clearance fit with one side of the side plate of the rack 2 close to the direction of the projector body 1, the axis direction of the first roller shaft 4a and the axis direction of the second roller shaft 4d are perpendicular to the side plate of the rack 2, the first gear 4b and the second gear 4c are fixedly sleeved on the first roller shaft 4a, the third gear 4e and the fourth gear 4f are fixedly sleeved on the second roller shaft 4d, the second gear 4c is meshed with the third gear 4e, the diameter of the second gear 4c is smaller than that of the first gear 4b, the diameter of the fourth gear 4f is smaller than that of the third gear 4e, the diameter of the second gear 4c is smaller than that of the third gear 4e, and the fourth gear 4f is in transmission connection with the.
The first gear 4b converts the force in the linear direction of the first linear driving mechanism 3 into torque, and the torque is transmitted to the second linear driving mechanism 5 through the second gear 4c, the third gear 4e and the fourth gear 4f in sequence, the first gear 4b and the second gear 4c are fixed on the first roller shaft 4a to rotate together, so that the angular velocity is consistent, the third gear 4e and the fourth gear 4f are fixed on the second roller shaft 4d to rotate at the same angular velocity, and finally, the linear velocity of the first gear 4b is greater than that of the fourth gear 4f through the multi-stage matching of the large gear and the small gear, so that the deceleration effect from the first linear driving mechanism 3 to the second linear driving mechanism 5 is realized, and the accurate control of zooming is facilitated.
The speed reducing mechanism 4 also comprises a damper 4g and a fourth gear 4 f; the damper 4g is fixedly mounted on one side, close to the direction of the projector body 1, of the side plate of the frame 2, the axis of the side plate of the frame is perpendicular to the side plate of the frame 2, the counter bores 4h are uniformly and circumferentially distributed on one side, close to the side plate of the frame 2, of the first gear 4b, and the damper 4g is in interference fit with the counter bores 4 h.
When the first gear 4b rotates, the counter bores 4h on the first gear 4b are in interference fit with one end of the damper 4g in the direction close to the projector body 1 in sequence, and the force on the damper 4g changes and feeds the motion state back to a controller, so that the controller can control zooming accurately and conveniently.
The second linear driving mechanism 5 comprises a second guide slide rail 5a and a third rack 5 b; the second guide slide rail 5a is fixedly installed on a bottom plate of the frame 2, the axis of the second guide slide rail in the length direction is parallel to the movement direction of the zooming control rod of the projector body 1, the third rack 5b is connected with the second guide slide rail 5a in a sliding mode, and the third rack 5b is connected with the output end of the speed reducing mechanism 4 in a transmission mode and is fixedly connected with the zooming control rod of the projector body 1.
The third rack 5b converts the torque at the end of the speed reducing mechanism 4 into a force along the length direction of the second guide slide rail 5a, and then drives the zoom control rod of the projector body 1 to move along the linear direction to realize the focus adjustment of the projector body 1.
The utility model discloses a theory of operation:
when the focal length of the projector body 1 needs to be adjusted, a control component of the first linear driving mechanism 3 is pushed and pulled manually, the other end of the first linear driving mechanism 3 drives the input end of the speed reducing mechanism 4 in transmission connection with the first linear driving mechanism to convert a linear square force into a rotary torque, the input end of the speed reducing mechanism 4 transmits the torque to the output end and reduces the displacement distance through the mutual meshing and transmission of internal gears so as to enable the control to be more accurate and labor-saving, the output end of the speed reducing mechanism 4 transmits the torque to the second linear driving mechanism 5 so as to enable the rotary torque to be changed into a linear force again, the output end of the second linear driving mechanism 5 pulls the zooming control rod of the projector body 1 fixedly connected with the output end of the second linear driving mechanism 5 to realize the adjustment of the focal length, when the projector body 1 does not need to be focused, a worker rotates the holding handle 3, the pressing plate 3f5 is close to the supporting plate 3f2 along the axis direction of the bolt 3f3, so that the second rack 3f6 is clamped in the tooth groove 3f1 on the holding handle 3e, the pressing plate 3f5 is pressed by the action of the spring 3f4 to tightly match the second rack 3f6 with the tooth groove 3f1, so that the holding handle 3e is locked in the horizontal direction, because the bolt 3f3 is arranged, the pressing plate 3f5 cannot deflect in the horizontal direction, the stability is ensured, when the first gear 4b rotates, the counter bores 4h on the first gear 4b are in interference fit with one end of the damper 4g close to the projector body 1 in sequence, the force on the damper 4g changes and feeds the motion state back to a controller, and therefore the controller can further conveniently and accurately control the zooming.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A DLP projector movement variable focal length device is characterized by comprising a projector body (1), a frame (2), a first linear driving mechanism (3), a speed reducing mechanism (4) and a second linear driving mechanism (5); frame (2) fixed mounting is on projector body (1), be equipped with the linear motion's of focus regulation control lever that zooms on projector body (1), first linear drive mechanism (3) fixed mounting is on frame (2) and drive assembly and frame (2) lateral wall sliding connection, first linear drive mechanism (3) output is connected with reduction gears (4) input transmission, reduction gears (4) one end fixed mounting is in frame (2) and the other end is connected with second linear drive mechanism (5) transmission, second linear drive mechanism (5) one end fixed mounting is in the frame (2) the other end and projector body (1) zoom control lever fixed connection.
2. A DLP projector movement variable focal length device according to claim 1, wherein the first linear driving mechanism (3) comprises a sliding slot (3a), a driving cross bar (3b), a first guiding sliding rail (3c), a first rack (3d) and a holding handle (3 e); the sliding groove (3a) is formed in a side plate of the rack (2), the length direction of the axis of the sliding groove is parallel to the length direction of the side plate of the rack (2), the driving cross rod (3b) is connected with the sliding groove (3a) in a sliding mode and is perpendicular to the sliding groove (3a), the driving cross rod (3b) is fixedly connected with the first rack (3d), the first guiding sliding rail (3c) is fixedly installed on the bottom surface of the rack (2), the length direction of the first guiding sliding rail (3c) is parallel to the length direction of the side plate of the rack (2), the first rack (3d) is connected with the first guiding sliding rail (3c) in a sliding mode, the holding handle (3e) and the driving cross rod (3b) are far away from one end of the first guiding sliding rail (3c) in a hinged mode, and the rotating surface of the hinged.
3. A DLP projector movement variable focal length device according to claim 2, wherein the first linear driving mechanism (3) is further provided with a locking assembly (3f), and the locking assembly (3f) comprises a toothed slot (3f1), a supporting plate (3f2), a bolt (3f3), a spring (3f4), a pressing plate (3f5) and a second rack (3f 6); the tooth groove (3f1) is arranged at the tail end of the holding handle (3e), the axial line of the tooth groove (3f1) in the length direction is parallel to the moving direction of the driving cross rod (3b), the supporting plate (3f2) is fixedly arranged on one side of the side plate of the machine frame (2) far away from the direction of the projector body (1), the bolt (3f3) is symmetrically in clearance fit with the supporting plate (3f2), the pressing plate (3f5) is fixedly connected with one end of the bolt (3f3) close to the direction of the holding handle (3e), the spring (3f4) is sleeved on the bolt (3f3) and is arranged between the supporting plate (3f2) and the pressing plate (3f5), the second rack (3f6) is fixedly arranged on one side of the supporting plate (3f2) facing the direction of the holding handle (3e) and the axial line of the length direction is parallel to the, when the holding handle (3e) rotates, the second rack (3f6) can be meshed with the tooth groove (3f1) and press the pressure plate (3f5) towards the direction of the supporting plate (3f 2).
4. A DLP projector movement variable focal length device according to claim 1, wherein the speed reduction mechanism (4) comprises a first roller (4a), a first gear (4b), a second gear (4c), a second roller (4d), a third gear (4e) and a fourth gear (4 f); the first gear (4b) is in transmission connection with the first linear driving mechanism (3), one ends of the first roller shaft (4a) and the second roller shaft (4d) are in clearance fit with one side of a side plate of the frame (2) close to the direction of the projector body (1), the axis direction of the first roller shaft is perpendicular to the side plate of the frame (2), the first gear (4b) and the second gear (4c) are fixedly sleeved on the first roller shaft (4a), the third gear (4e) and the fourth gear (4f) are fixedly sleeved on the second roller shaft (4d), the second gear (4c) is meshed with the third gear (4e), the diameter of the second gear (4c) is smaller than that of the first gear (4b), the diameter of the fourth gear (4f) is smaller than that of the third gear (4e), the diameter of the second gear (4c) is smaller than that of the third gear (4e), and the fourth gear (4f) is in transmission connection with the second linear driving mechanism (5).
5. A DLP projector core variable focal length device as claimed in claim 4, wherein the speed reducing mechanism (4) further comprises a damper (4g) and a fourth gear (4 f); damper (4g) fixed mounting is in frame (2) curb plate and the axis is perpendicular with frame (2) curb plate near one side of projector body (1) direction, and counter bore (4h) evenly circumference distributes on one side that first gear (4b) is close to frame (2) curb plate, damper (4g) and counter bore (4h) interference fit.
6. A DLP projector movement variable focal length device according to claim 1, wherein the second linear drive mechanism (5) comprises a second guide rail (5a) and a third rack (5 b); the second guide sliding rail (5a) is fixedly installed on a bottom plate of the rack (2), the axis of the second guide sliding rail in the length direction is parallel to the movement direction of the zooming control rod of the projector body (1), the third rack (5b) is in sliding connection with the second guide sliding rail (5a), and the third rack (5b) is in transmission connection with the output end of the speed reducing mechanism (4) and is fixedly connected with the zooming control rod of the projector body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922028939.XU CN210691026U (en) | 2019-11-20 | 2019-11-20 | DLP projector core variable focal length device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922028939.XU CN210691026U (en) | 2019-11-20 | 2019-11-20 | DLP projector core variable focal length device |
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| Publication Number | Publication Date |
|---|---|
| CN210691026U true CN210691026U (en) | 2020-06-05 |
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| CN201922028939.XU Active CN210691026U (en) | 2019-11-20 | 2019-11-20 | DLP projector core variable focal length device |
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| CN (1) | CN210691026U (en) |
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- 2019-11-20 CN CN201922028939.XU patent/CN210691026U/en active Active
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