CN211698556U - Projection lens with double-layer linear focusing structure - Google Patents
Projection lens with double-layer linear focusing structure Download PDFInfo
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- CN211698556U CN211698556U CN202020288499.1U CN202020288499U CN211698556U CN 211698556 U CN211698556 U CN 211698556U CN 202020288499 U CN202020288499 U CN 202020288499U CN 211698556 U CN211698556 U CN 211698556U
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Abstract
The utility model relates to a projection lens technical field, in particular to projection lens of double-deck linear focusing structure. This camera lens includes lens mount, lens subassembly, swivel ring, focusing handle, guide bar, has seted up oblique long type hole, straight long type hole on the wall of lens mount, has seted up ring channel, locating hole on the lens subassembly, and the focusing handle is connected with the swivel ring, and the swivel ring is located in the ring channel and the focusing handle wears out oblique long type hole setting, and the focusing handle removes in oblique long type hole to promote the lens subassembly back-and-forth movement through the swivel ring, the guide bar is connected with the locating hole and is located straight long type downthehole, so that do not take place the axial rotation when making the lens subassembly back-and-forth movement. The overall volume of the equipment is reduced through the design of the focusing structure with a double-layer structure, so that the equipment is more portable and has low production cost; the lens assembly moves in the front-back direction in the focusing process, and does not rotate in the axial direction, so that the optical consistency of the projection system is ensured.
Description
Technical Field
The utility model relates to a projection lens technical field, in particular to projection lens of double-deck linear focusing structure.
Background
In the projection system, the lens group is an important component for eliminating aberration, improving projection image quality and realizing different focal lengths. The projection lens is provided with a focusing structure to adjust the focal length and ensure the definition of a projection picture. The existing common focusing structures on the market have the following two types: the focusing structure comprises three layers, wherein the inner layer is a lens assembly, the middle layer is a lens base, and the outer layer is a focusing ring; the focusing structure is divided into two layers, the inner layer is a lens assembly, the outer layer is a lens base, a focusing guide nail is arranged outside the lens assembly, the lens base is provided with a guide groove, and the focusing guide nail drives the lens assembly to move back and forth by rotating. In practical use, the lens structure of the three-layer focusing structure is bulkier, and the size and the mass are larger. The focusing structures of the middle layer and the two layers are simplified in structure, but the focusing structures rotate while moving the lens component back and forth, and if the lens component comprises an aspheric lens, the rotation can cause corresponding change of eccentricity of the aspheric lens, so that the optical consistency of the projection system is influenced.
SUMMERY OF THE UTILITY MODEL
For overcoming the deficiencies in the prior art, the utility model provides a frivolous, good projection lens of double-deck linear focusing structure of display effect.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a projection lens of double-deck linear focusing structure, includes the lens mount, inlays the lens subassembly of locating in the lens mount, its characterized in that: the lens assembly is characterized by further comprising a rotating ring, a focusing handle and a guide rod, wherein an inclined long hole and a straight long hole are formed in the wall surface of the lens base, the length direction of the inclined long hole and the axis angle of the lens base are arranged in a staggered mode, the length direction of the straight long hole and the axis of the lens base are arranged in parallel, an annular groove and a positioning hole are formed in the lens assembly, the annular groove corresponds to the inclined long hole, the positioning hole corresponds to the straight long hole, the focusing handle is connected with the rotating ring, the rotating ring is arranged in the annular groove, penetrates out of the inclined long hole, the focusing handle moves in the inclined long hole and pushes the lens assembly to move back and forth through the rotating ring, and the guide rod is connected with the positioning hole and located in the straight long hole so that the lens assembly does not axially rotate when moving.
Further, the focusing handle is including grabbing head and gag lever post, the diameter of grabbing the head is greater than the width in oblique long type hole, the gag lever post is worn to locate oblique long type hole, and one end fixed connection is grabbed head, other end threaded connection rotating ring.
Furthermore, the rotating ring is of a semicircular ring structure, the radian of the rotating ring is less than or equal to pi, and the arc length of the rotating ring is greater than the length of the oblique long hole, so that the rotating ring cannot penetrate through the oblique long hole to be taken out.
Furthermore, the guide rod is connected with the positioning hole through threads.
Furthermore, the diameter of the guide rod is matched with the width of the straight long hole.
Furthermore, the number of the straight long holes is two, the two straight long holes are symmetrically arranged around the axis of the lens base, the lens assembly is correspondingly provided with two positioning holes, and the two guide rods are respectively connected with the two positioning holes and correspondingly located in the two straight long holes.
As can be seen from the above description of the present invention, compared with the prior art, the projection lens with the double-layer linear focusing structure provided by the present invention reduces the overall volume of the device by the design of the double-layer focusing structure, so that the device is more portable; the equipment structure is simple, the number of parts is small, and the production cost is low; the lens assembly moves in the front-back direction in the focusing process, and does not rotate in the axial direction, so that the problem that the aspheric lens of the lens assembly rotates in the axial direction and is eccentric and changed is avoided, and the optical consistency of the projection system is ensured.
Drawings
Fig. 1 is the utility model relates to a projection lens decomposition structure diagram of double-deck linear focusing structure.
Fig. 2 is the utility model relates to a projection lens structure diagram of double-deck linear focusing structure.
Fig. 3 is a top view of the projection lens with a double-layer linear focusing structure of the present invention.
Fig. 4 is a cross-sectional view of a projection lens with a double-layer linear focusing structure according to the present invention.
The labels in the figure correspond to the following: 1. the lens comprises a lens base, 11 parts of an inclined long hole, 12 parts of a straight long hole, 2 parts of a lens assembly, 21 parts of an annular groove, 22 parts of a positioning hole, 3 parts of a rotating ring, 4 parts of a focusing handle, 41 parts of a grasping head, 42 parts of a limiting rod and 5 parts of a guide rod.
Detailed Description
The present invention will be further described with reference to the following detailed description.
Referring to fig. 1 to 4, a projection lens with a double-layer linear focusing structure includes a lens mount 1, a lens assembly 2, a rotating ring 3, a focusing handle 4, and a guide rod 5.
The lens component 2 is embedded in the lens base 1, an inclined long hole 11 and a straight long hole 12 are formed in the wall surface of the lens base 1, the length direction of the inclined long hole 11 and the axis angle of the lens base 1 are arranged in a staggered mode, the length direction of the straight long hole 12 and the axis of the lens base 1 are arranged in parallel, an annular groove 21 and a positioning hole 22 are formed in the lens component 2, the annular groove 21 corresponds to the inclined long hole 11, the positioning hole 22 corresponds to the straight long hole 12, the focusing handle 4 is connected with the rotating ring 3, the rotating ring 3 is arranged in the annular groove 21, the focusing handle 4 penetrates out of the inclined long hole 11, the focusing handle 4 moves in the inclined long hole 11 and pushes the lens component 2 to move back and forth through the rotating ring 3, the guide rod 5 is connected with the positioning hole 22 and located in the straight long hole 12, and axial rotation does not occur when the lens component.
The focusing handle 4 comprises a grasping head 41 and a limiting rod 42, the diameter of the grasping head 41 is larger than the width of the oblique long hole 11, the limiting rod 42 penetrates through the oblique long hole 11, one end of the limiting rod is fixedly connected with the grasping head 41, and the other end of the limiting rod is in threaded connection with the rotating ring 3. The rotating ring 3 is provided with a semicircular ring structure, the radian of the rotating ring 3 is less than or equal to pi, and the arc length of the rotating ring is greater than the length of the inclined long hole 11, so that the rotating ring 3 cannot penetrate through the inclined long hole 11 to be taken out. The guide rod 5 is connected with the positioning hole 22 through threads, and the diameter of the guide rod 5 is matched with the width of the straight long hole 12. The two straight long holes 12 are symmetrically arranged around the axis of the lens mount 1, the two lens assemblies 2 are correspondingly provided with two positioning holes 22, and the two guide rods 5 are respectively connected with the two positioning holes 22 and correspondingly positioned in the two straight long holes 12.
The working principle of the projection lens with the double-layer linear focusing structure is as follows:
when the focusing handle 4 is pulled, the limiting rod 42 moves along the direction of the inclined long hole 11, so that the rotating ring 3 can move forwards and backwards to a certain extent while rotating, and the rotating ring 3 is positioned in the annular groove 21 of the lens assembly 2, so that the rotating ring 3 can push the lens assembly 2 to move forwards and backwards; because lens subassembly 2 connects guide bar 5, guide bar 5 removes along the axis direction at straight long type hole 12 restriction, does not take place axial rotation when consequently lens subassembly 2 back-and-forth movement, has avoided lens subassembly 2 axial to rotate the eccentric problem that changes of its aspheric surface lens, and the process of zooming is linear motion, has guaranteed the uniformity of projection system optics. After zooming is finished, the focusing handle 4 is locked and fixed with the lens holder 1 by the locking screw thread because the focusing handle 4 is connected with the rotating ring 3 by the screw thread, so as to position the focused lens assembly 2.
The above-mentioned only be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and all utilize this design right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (6)
1. The utility model provides a projection lens of double-deck linear focusing structure, includes the lens mount, inlays the lens subassembly of locating in the lens mount, its characterized in that: the lens assembly is characterized by further comprising a rotating ring, a focusing handle and a guide rod, wherein an inclined long hole and a straight long hole are formed in the wall surface of the lens base, the length direction of the inclined long hole and the axis angle of the lens base are arranged in a staggered mode, the length direction of the straight long hole and the axis of the lens base are arranged in parallel, an annular groove and a positioning hole are formed in the lens assembly, the annular groove corresponds to the inclined long hole, the positioning hole corresponds to the straight long hole, the focusing handle is connected with the rotating ring, the rotating ring is arranged in the annular groove, penetrates out of the inclined long hole, the focusing handle moves in the inclined long hole and pushes the lens assembly to move back and forth through the rotating ring, and the guide rod is connected with the positioning hole and located in the straight long hole so that the lens assembly does not axially rotate when moving.
2. The projection lens with the double-layer linear focusing structure according to claim 1, wherein: the focusing handle is including grabbing head and gag lever post, the diameter of grabbing the head is greater than the width in oblique long type hole, the gag lever post is worn to locate oblique long type hole, and one end fixed connection is grabbed head, other end threaded connection swivel becket.
3. The projection lens with the double-layer linear focusing structure according to claim 1, wherein: the rotating ring is of a semicircular ring structure, the radian of the rotating ring is less than or equal to pi, and the arc length of the rotating ring is greater than the length of the oblique long hole, so that the rotating ring cannot penetrate through the oblique long hole to be taken out.
4. The projection lens with the double-layer linear focusing structure according to claim 1, wherein: the guide rod is connected with the positioning hole through threads.
5. The projection lens with the double-layer linear focusing structure according to claim 1, wherein: the diameter of the guide rod is matched with the width of the straight long hole.
6. The projection lens with the double-layer linear focusing structure according to claim 1, wherein: the lens component is provided with two positioning holes, and the two guide rods are connected with the two positioning holes respectively and are correspondingly located in the two straight long holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020288499.1U CN211698556U (en) | 2020-03-10 | 2020-03-10 | Projection lens with double-layer linear focusing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020288499.1U CN211698556U (en) | 2020-03-10 | 2020-03-10 | Projection lens with double-layer linear focusing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211698556U true CN211698556U (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020288499.1U Active CN211698556U (en) | 2020-03-10 | 2020-03-10 | Projection lens with double-layer linear focusing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211698556U (en) |
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2020
- 2020-03-10 CN CN202020288499.1U patent/CN211698556U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221115 Address after: 344799 Building B7, School Furniture Industrial Park, Nancheng County, Fuzhou City, Jiangxi Province Patentee after: Jiangxi Xingchi Electronic Technology Co.,Ltd. Address before: 362000 special vehicle base in Quanzhou Economic and Technological Development Zone, Fujian Province Patentee before: FUJIAN RUICHI INTELLIGENT TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |
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| TR01 | Transfer of patent right |