Miniature spiral focusing device special for small astronomical telescope
By designing a single helical focus structure in a small astronomical telescope and increasing the limitation of axial rotation freedom, the existing focus devices are solved in the difficult processing and assembly and poor focus accuracy, achieving higher focus accuracy and better user experience.
Patent Information
- Application Number
- CN202421777926.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-25
AI Technical Summary
The existing micro focus devices are difficult to process and assemble, poor focus accuracy, and cannot limit the axial rotation freedom of the eyepiece and the camera, resulting in target loss and winding problems.
A small astronomical telescope-specific micro-spiral focusing device is designed, adopting a single-spiral focusing structure, and through the axial rotation degree of freedom of the focus part, the threaded connection between the focus handwheel and the focus seat is used to limit the radial displacement and axial rotation of the focus seat, and only the axial forward and backward displacement movement is retained.
It achieves higher focus accuracy and better user experience, while reducing the difficulty of parts processing and assembly, and is suitable for optical focusing of small telescopes.
Smart Images
Figure CN222812995U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of astronomical telescopes, in particular to a special miniature spiral focuser for a small astronomical telescope. Background Art
[0002] At present, the existing micro focusers often use double-screw focusing structures and simple single-thread focusing structures. The double-screw structure uses the travel difference between the ultra-fine thread and the multi-start thread for focusing, but has the disadvantages of greater difficulty in parts processing, higher requirements for parts processing accuracy, and greater difficulty in assembly; the simple single-thread focusing structure has the disadvantages of poor focusing accuracy and the inability to limit the axial rotation freedom of the eyepiece and the camera, which easily leads to target loss and winding, due to its simple structure. Summary of the invention
[0003] In order to solve the above problems, the utility model provides a miniature spiral focuser specially used for a small astronomical telescope, comprising: a focusing barrel, a locking screw, a focusing hand wheel, a pressure ring, a cylindrical pin, a focusing screw and a focusing seat; at least one keyway is provided at the front of the focusing barrel, and a protrusion is provided at the outer side of the rear; at least one pin hole is provided at the rear of the focusing seat, and the focusing seat is arranged on the outside of the focusing barrel and connected through cylindrical matching; the cylindrical pin passes through the pin hole and is arranged in the keyway; a thread is provided at the outer side of the rear of the focusing seat, one end of the focusing hand wheel is arranged on the outer side of the focusing seat and is threadedly connected with the focusing seat, and the other end is provided with an inward protrusion, which is clamped by the protrusion on the outer side of the focusing barrel and the pressure ring, the pressure ring is arranged on the outer side of the focusing barrel, the pressure ring is connected to the focusing barrel through threads, and the locking screw passes through the pressure ring and is connected with the protrusion on the outer side of the focusing barrel. The focusing hand wheel and the focusing seat are threadedly connected to each other to limit the radial displacement of the focusing seat. The focusing seat and the focusing tube are connected by a cylindrical pin to limit the axial rotation between the focusing seat and the focusing tube. Therefore, only the axial forward and backward displacement movement is retained between the focusing tube and the focusing seat; the focusing hand wheel and the focusing tube are connected by cylindrical matching to limit the radial movement of the focusing hand wheel. The pressure ring and the focusing tube are threadedly connected and a screw is set to prevent loosening to limit the axial displacement movement of the focusing hand wheel. Therefore, only the axial rotation movement of the focusing hand wheel is retained; when focusing, the focusing hand wheel is turned, and the lifting force provided by the threaded pair movement between the focusing hand wheel and the focusing seat drives the focusing seat to move forward and backward, thereby achieving the purpose of optical focusing.
[0004] Furthermore, an eyepiece locking screw is provided at the front of the focus seat, and the eyepiece locking screw passes through the focus seat. The eyepiece locking screw is used to prevent the eyepiece from loosening, and an eyepiece socket and a camera interface are provided at the end of the focus seat for target observation.
[0005] Furthermore, a scale is provided on the outside of the focusing seat for focus indication.
[0006] Furthermore, an anti-skid rubber is provided on the outer side of the focusing hand wheel to prevent slipping during focusing.
[0007] The above technical solution of the utility model has the following beneficial technical effects: the utility model adopts a single-helix focusing structure and increases the axial rotation freedom limit of the key parts. Compared with the double-helix focusing structure, it has the advantages of lower cost, greatly reduced parts processing difficulty and product assembly difficulty; compared with the simple single-thread focusing structure, it also has the advantages of higher focusing accuracy and better user experience, but the cost is slightly higher, and the weight and volume are also increased compared with the single-thread focusing structure. It is mainly used to realize the optical focusing of small telescopes. Compared with the focusing system of large telescopes, it has the characteristics of small size, light weight, low cost, fast and stable focusing, etc., and is more suitable for use with entry-level astronomical telescopes. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is a schematic diagram of a miniature spiral focuser for small astronomical telescopes;
[0009] Figure 2 This is a cross-sectional structural diagram of a miniature spiral focuser for a small astronomical telescope.
[0010] Reference numerals:
[0011] 1: Focusing tube; 2: Locking screw; 3: Focusing hand wheel; 4: Pressing ring; 5: Anti-slip rubber; 6: Cylindrical pin; 7: Focusing screw; 8: Eyepiece locking screw; 9: Focusing seat. DETAILED DESCRIPTION
[0012] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0013] The utility model provides a miniature spiral focuser specially used for a small astronomical telescope, comprising: a focusing tube, a locking screw, a focusing hand wheel, a pressure ring, a cylindrical pin, a locking screw and a focusing seat; the front part of the focusing tube is provided with at least one keyway, and the outer side of the rear part is provided with a protrusion; the rear part of the focusing seat is provided with at least one pin hole, and the focusing seat is arranged on the outside of the focusing tube and connected through cylindrical matching; the cylindrical pin passes through the pin hole and is arranged in the keyway; the outer side of the rear part of the focusing seat is provided with a thread, one end of the focusing hand wheel is arranged on the outer side of the focusing seat and is threadedly connected with the focusing seat, and the other end is provided with an inwardly facing protrusion, the inwardly facing protrusion is clamped by the outer side protrusion of the focusing tube and the pressure ring, the pressure ring is arranged on the outer side of the focusing tube, the pressure ring is connected with the focusing tube through threads, and the locking screw passes through the pressure ring and is connected with the outer side protrusion of the focusing tube. The focusing hand wheel and the focusing seat are threadedly connected to each other to limit the radial displacement of the focusing seat. The focusing seat and the focusing tube are connected by a cylindrical pin to limit the axial rotation between the focusing seat and the focusing tube. Therefore, only the axial forward and backward displacement movement is retained between the focusing tube and the focusing seat; the focusing hand wheel and the focusing tube are connected by cylindrical matching to limit the radial movement of the focusing hand wheel. The pressure ring and the focusing tube are threadedly connected and a screw is set to prevent loosening to limit the axial displacement movement of the focusing hand wheel. Therefore, only the axial rotation movement of the focusing hand wheel is retained; when focusing, the focusing hand wheel is turned, and the lifting force provided by the threaded pair movement between the focusing hand wheel and the focusing seat drives the focusing seat to move forward and backward, thereby achieving the purpose of optical focusing.
[0014] Preferably, an eyepiece locking screw is provided at the front of the focusing seat, and the eyepiece locking screw passes through the focusing seat. The eyepiece locking screw is used to prevent the eyepiece from loosening, and an eyepiece socket and a camera interface are provided at the end of the focusing seat for target observation.
[0015] Preferably, a scale is provided on the outside of the focusing seat for focus indication.
[0016] Preferably, the outer side of the focusing hand wheel is provided with anti-skid rubber to prevent slipping during focusing.
[0017] In a specific embodiment, if Figure 1 and Figure 2As shown, a miniature spiral focuser specially used for a small astronomical telescope comprises: a focusing tube 1, a locking screw 2, a focusing hand wheel 3, a pressing ring 4, a cylindrical pin 6, a focusing screw 7 and a focusing seat 9; the front part of the focusing tube 1 is provided with at least three keyways, and the outer side of the rear part is provided with a protrusion; the rear part of the focusing seat 9 is provided with at least three pin holes, and the focusing seat 9 is arranged on the outside of the focusing tube 1 and connected through cylindrical matching; the cylindrical pin 6 passes through the pin hole and is arranged in the keyway; the outer side of the rear part of the focusing seat 9 is provided with a thread, one end of the focusing hand wheel 3 is arranged on the outer side of the focusing seat 9 and is threadedly connected with the focusing seat 9, and the other end is provided with an inward protrusion, which is clamped by the outer protrusion of the focusing tube 1 and the pressing ring 4, the pressing ring 4 is arranged on the outer side of the focusing tube 1, the pressing ring 4 is connected with the focusing tube 1 through threads, and the locking screw 2 passes through the pressing ring 4 and is connected with the outer protrusion of the focusing tube 1. The focusing hand wheel 3 and the focusing seat 9 are mutually matched through threaded connection to limit the radial displacement of the focusing seat 9. The focusing seat 9 and the focusing tube 1 are connected through a cylindrical pin 6 to limit the axial rotation between the focusing seat 9 and the focusing tube 1. Therefore, only the axial forward and backward displacement movement is retained between the focusing tube 1 and the focusing seat 9; the focusing hand wheel 3 and the focusing tube 1 are connected through cylindrical matching to limit the radial movement of the focusing hand wheel 3. The pressure ring 4 and the focusing tube 1 are connected through threads and a locking screw 2 is provided to prevent loosening to limit the axial displacement movement of the focusing hand wheel 3. Therefore, only the axial rotation movement of the focusing hand wheel 3 is retained; when focusing, the focusing hand wheel 3 is turned, and the lifting force provided by the threaded pair movement between the focusing hand wheel 3 and the focusing seat 9 drives the focusing seat 9 to move forward and backward, thereby achieving the purpose of optical focusing. An eyepiece locking screw 8 is provided at the front of the focusing seat 9, and the eyepiece locking screw 8 passes through the focusing seat 9. The eyepiece locking screw is used to prevent the eyepiece from loosening. The end of the focus seat is provided with an eyepiece socket and a camera interface for target observation. A scale is provided on the outside of the focus seat 9 for focus indication. An anti-skid rubber 5 is provided on the outside of the focus hand wheel 3 for anti-skid during focusing.
[0018] The utility model aims to protect a miniature spiral focuser for a small astronomical telescope, which has an original single spiral plus a weighted part axial rotation freedom restriction combined structure. A structure that can use 1 to 3 pins to restrict the axial rotation freedom of the focus seat. A structure that uses a pressure ring to restrict the axial displacement freedom of the focus hand wheel.
[0019] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.
Claims
1. A miniature spiral focuser for a small astronomical telescope, characterized in that: include: A focusing barrel, a locking screw, a focusing hand wheel, a pressure ring, a cylindrical pin, a focusing screw and a focusing seat; the front of the focusing barrel is provided with at least one keyway, and the outer side of the rear is provided with a protrusion; the rear of the focusing seat is provided with at least one pin hole, and the focusing seat is arranged on the outside of the focusing barrel and connected through cylindrical fitting; the cylindrical pin passes through the pin hole and is arranged in the keyway; a thread is arranged on the outer side of the rear of the focusing seat, one end of the focusing hand wheel is arranged on the outer side of the focusing seat and is threadedly connected to the focusing seat, and the other end is provided with an inward protrusion, and the inward protrusion is clamped by the protrusion on the outer side of the focusing barrel and the pressure ring, the pressure ring is arranged on the outer side of the focusing barrel, the pressure ring is connected to the focusing barrel through threads, and the locking screw passes through the pressure ring and is connected to the protrusion on the outer side of the focusing barrel.
2. The miniature spiral focuser for a small astronomical telescope according to claim 1, characterized in that: An eyepiece locking screw is arranged at the front of the focusing seat, and the eyepiece locking screw passes through the focusing seat.
3. The miniature spiral focuser for a small astronomical telescope according to claim 1, characterized in that: A scale ruler is arranged on the outer side of the focusing seat.
4. The miniature spiral focuser for a small astronomical telescope according to claim 1, characterized in that: The outer side of the focusing hand wheel is provided with anti-skid rubber.