Optical focalizer of astronomical telescope

Abstract

An optical focusing device of an astronomical telescope belongs to the technical field of optics and comprises a focusing seat, a joint, a focusing cylinder, a focusing connecting seat, a focusing hand wheel, a focusing adjusting shaft, a focusing cylinder penetrating part and a focusing adjusting shaft penetrating part. Two sliding seats are arranged on the rear side of the central cavity of the focusing seat and the penetrating part of the focusing cylinder; two sliding plate seats A are longitudinally arranged on the rear side of the focusing cylinder, and each sliding plate seat A is provided with a sliding plate A; two pulleys are arranged between each sliding plate seat A and the sliding plate A, pulley shafts of the pulleys are fixedly arranged on the side walls of the sliding seats, and the inner sides of the pulleys are tightly matched with the outer side faces of the sliding plates A; a sliding plate seat B is arranged on the front side of the focusing cylinder, and a sliding plate B is arranged on the sliding plate seat B. The utility model has the benefits that the structure is simplified, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model discloses an optical focuser, in particular to an optical focuser for an astronomical telescope, belonging to the technical field of optics. Background Art

[0002] The optical focuser of an astronomical telescope often uses gear rack focusing and spiral focusing. For example, the utility model with authorization announcement number CN 211043802 U and application number 2019219607353 discloses an astronomical telescope focusing structure, including a focusing barrel, a side wall of the focusing barrel having a scale bar extending outward, and the scale bar having indicating scale lines; a focusing seat sleeved on the focusing barrel; a gear assembly for adjusting the relative position of the focusing seat and the focusing barrel; and a retractable eyepiece socket, which is movably connected to the end of the focusing barrel.

[0003] The application publication number is CN 110873959 A, and the application number is 2018110127789. The invention discloses an astronomical telescope and microscope dual-purpose popular science instrument, comprising an astronomical telescope and a microscope attachment lens, wherein the astronomical telescope consists of a lens barrel I, a spiral focusing group I connected to the lens barrel I, a light barrier group I with divided lines, a light shield I, a astronomical positive lens objective group I, and an eyepiece group I.

[0004] The above two technical solutions respectively use a gear rack focusing structure and a spiral focusing structure to achieve optical focusing of the astronomical telescope. Both of them have the defects of complex structure, low working efficiency and high manufacturing cost, and are in great need of improvement. Utility Model Content

[0005] The purpose of the utility model is to provide an optical focuser for an astronomical telescope with a novel focusing structure in view of the defects of the prior art of the optical focuser for the above-mentioned astronomical telescope, such as complex structure, low working efficiency and high manufacturing cost, so as to achieve the purpose of simplifying the structure and improving the working efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an optical focuser for an astronomical telescope, comprising a focus seat, a joint, a focus barrel, a focus connection seat, a focus hand wheel, and a focus adjustment shaft; the joint is arranged above the focus barrel, and the focus connection seat is arranged below the focus barrel;

[0007] The focus seat is an integrated structure, including a focus barrel penetration part at the rear side and a focus adjustment shaft penetration part at the front side; the center of the focus barrel penetration part is a focus seat central cavity arranged in a vertical direction, the focus barrel is movably penetrated in the focus seat central cavity up and down, and the center of the focus barrel is an eyepiece hole;

[0008] The focus adjustment shaft penetration portion is laterally provided with a focus adjustment shaft penetration hole, and a groove is provided on the focus adjustment shaft penetration portion; the focus adjustment shaft is horizontally rotatably arranged in the focus adjustment shaft penetration hole;

[0009] Two sliding seats are arranged on the rear side of the central cavity of the focusing seat and on the focusing tube penetration part;

[0010] Two slide seats A are longitudinally arranged at the rear side of the focusing barrel, and each of the two slide seats A is provided with a slide A, and the slide A is fixed to the slide seat A of the focusing barrel by adhesive bonding; two pulleys are arranged between each slide seat A and the slide A, and the pulley shafts of the pulleys are fixedly arranged on the side walls of the slide seat, and the inner sides of the pulleys are tightly matched with the outer sides of the slide A; when the focusing barrel is lifted up and down in the central cavity of the focusing seat, the pulleys rotate on the pulley shafts driven by the friction resistance between the inner sides of the pulleys and the outer sides of the slide A;

[0011] A slide plate seat B is provided at the front side of the focusing tube, a slide plate B is provided on the slide plate seat B, and the slide plate B is fixed to the slide plate seat B of the focusing tube by adhesive bonding; a pressing block is provided on the groove of the focus adjustment shaft penetration part, the inner side of the pressing block is tightly matched with the outer side of the focus adjustment shaft, and the outer side surface of the slide plate B is tightly pressed against the inner side of the focus adjustment shaft; a bolt through hole is provided at the front side of the focus adjustment shaft penetration part, an adjusting bolt is provided in the bolt through hole, and the front end of the adjusting bolt is tightly pressed against the middle part of the outer side of the pressing block;

[0012] When the adjusting bolt is turned forward, it can push the pressure block to press against the focus adjusting shaft. Conversely, when the adjusting bolt is withdrawn backward, the pressure block and the focus adjusting shaft are out of contact. When the adjusting bolt is turned forward and the pressure block is in press against the focus adjusting shaft, when the focus hand wheel is turned, the focus adjusting shaft rotates, and the focusing tube can slide on the slide B driven by the friction resistance between the focus adjusting shaft and the outer side of the slide B, so as to realize the up and down lifting movement of the focusing tube in the central cavity of the focusing seat. When the focus hand wheel is rotated forward, the focusing tube rises, and when the focus hand wheel is rotated reversely, the focusing tube falls, thereby achieving the purpose of focusing.

[0013] It also includes a joint fastening screw, which is arranged on one side of the joint. A spring piece is installed on the inner circle of the joint. The joint fastening screw passes through the joint and presses on the outside of the spring piece. When the joint fastening screw is tightened, the joint fastening screw presses the spring piece inward, so that the spring piece fixes the eyepiece.

[0014] A positioning bolt is arranged above the adjusting bolt, the front end of which is tightly against the slide plate B, and the positioning bolt is tightened inwardly to keep the focusing tube in a fixed position.

[0015] The focusing connection seat connects the optical focuser of the astronomical telescope to other types of telescopes.

[0016] The two pulleys are distributed up and down, and the center lines of the two pulleys are longitudinally on the same vertical line.

[0017] It also includes a connecting seat fixing screw, which is arranged from bottom to top, and the focusing connecting seat is fixed to the focusing tube through the connecting seat fixing screw.

[0018] The inner hole of the joint is aligned with the eyepiece hole, the inner wall of the focusing seat and the inner hole of the focusing connecting seat form a central channel, the focusing tube is arranged in the central channel, and the inner hole of the focusing connecting seat matches the outer diameter of the focusing tube.

[0019] The degree of forward twisting will produce different degrees of tightness between the block and the focus adjustment shaft. This adjusting bolt is used to adjust the lightness or heaviness of the feel when the focusing tube is raised or lowered, to meet the needs of different customers for lightness or heaviness.

[0020] The interference fit created by the tight fit between the inner side of the pulley and the outer side of the skateboard A, and the interference fit created by the tight fit between the outer side of the skateboard B and the inner side of the focusing adjustment shaft, press the focusing barrel against the pulley and the focusing adjustment shaft, thereby increasing the stability of the system, ensuring the relative fixation between the focusing seat and the focusing tube, and allowing the focusing tube to move up and down in the central cavity of the focusing seat under the adjustment of the focusing handwheel.

[0021] Compared with the prior art, the beneficial effect of the utility model is that it provides a unique structure of an optical focuser of an astronomical telescope with a novel focusing structure, which can replace the conventional gear rack focusing and spiral focusing structure, thereby achieving the purpose of simplifying the structure and improving work efficiency, thereby reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Yes: The front stereogram of the utility model;

[0023] Figure 2 Yes: Reverse stereogram of the utility model (without focusing seat);

[0024] Figure 3 Yes: rear view of the utility model (focusing tube is stored in the focusing seat);

[0025] Figure 4 yes: Figure 3 AA section view;

[0026] Figure 5 yes: Figure 3 BB cross-sectional view;

[0027] Figure 6 yes: Figure 5 A magnified view of part A;

[0028] Figure 7 yes: Figure 5 Enlarged view of part B.

[0029] Figure 8 1 is: the left view of the utility model.

[0030] Explanation of the accompanying drawings: focusing seat 1, joint 2, focusing tube 3, focusing connecting seat 4, focusing hand wheel 5, focusing adjustment shaft 6, focusing tube penetration part 7, focusing adjustment shaft penetration part 8, eyepiece hole 9, sliding seat 10, skateboard seat A11, skateboard A12, pulley 13, skateboard seat B14, skateboard B15, joint fastening screw 16, adjusting bolt 17, positioning bolt 18, connecting seat fixing screw 19, pressure block 20, spring piece 21. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The front, back, left and right directions described in the utility model are for the convenience of description and can actually be interchanged.

[0032] like Figures 1 to 8 As shown, an optical focuser of an astronomical telescope, such as Figures 1 to 4 As shown, it includes a focus seat 1, a joint 2, a focus tube 3, a focus connection seat 4, a focus hand wheel 5, and a focus adjustment shaft 6; the joint 2 is arranged above the focus tube 3, and the focus connection seat 4 is arranged below the focus tube 3;

[0033] like Figure 1 , Figure 4 and Figure 5 As shown, the focus seat 1 is an integrated structure, including a focus barrel penetration portion 7 at the rear side and a focus adjustment shaft penetration portion 8 at the front side; the center of the focus barrel penetration portion 7 is a central cavity of the focus seat 1 arranged in a vertical direction, the focus barrel 3 is movably penetrated in the central cavity of the focus seat 1 up and down, and the center of the focus barrel 3 is an eyepiece hole 9;

[0034] like Figure 5 , Figure 6 and Figure 7 As shown, the focus adjustment shaft penetration portion 8 is transversely provided with a focus adjustment shaft 6 penetration hole, and a groove is provided on the focus adjustment shaft penetration portion 8; the focus adjustment shaft 6 is horizontally rotatably arranged in the focus adjustment shaft 6 penetration hole;

[0035] Two sliding seats 10 are arranged on the rear side of the central cavity of the focusing seat 1 and on the focusing tube penetration portion 7;

[0036] like Figure 2 , Figure 5 and Figure 6 As shown, two slide seats A11 are longitudinally arranged at the rear side of the focusing barrel 3, and each of the two slide seats A11 is provided with a slide plate A12, and the slide plate A12 is fixed to the slide seat A11 of the focusing barrel 3 by adhesive bonding; two pulleys 13 are respectively arranged between each slide seat A11 and the slide plate A12, and the pulley shaft of the pulley 13 is fixedly arranged on the side wall of the sliding seat 10, and the inner side of the pulley is tightly matched with the outer side of the slide plate A12; when the focusing barrel 3 is lifted up and down in the central cavity of the focusing seat 1, the pulley rotates on the pulley shaft driven by the friction resistance between the inner side of the pulley and the outer side of the slide plate A12;

[0037] like Figure 4 , Figure 5 and Figure 7 As shown, a slide plate seat B14 is provided at the front side of the focusing tube 3, a slide plate B15 is provided on the slide plate seat B14, and the slide plate B15 is fixed to the slide plate seat B14 of the focusing tube 3 by adhesive bonding; a pressing block 20 is provided on the groove of the focus adjustment shaft penetration portion 8, the inner side of the pressing block is tightly matched with the outer side of the focus adjustment shaft 6, and the outer side surface of the slide plate B15 is tightly pressed against the inner side of the focus adjustment shaft 6; a bolt through hole is provided at the front side of the focus adjustment shaft penetration portion 8, an adjusting bolt 17 is provided in the bolt through hole, and the front end of the adjusting bolt 17 is tightly pressed against the middle part of the outer side of the pressing block;

[0038] When the adjusting bolt 17 is turned forward, it can push the pressure block to press against the focus adjusting shaft 6, and conversely, when the adjusting bolt 17 is withdrawn backward, the pressure block and the focus adjusting shaft 6 are out of contact; when the adjusting bolt 17 is turned forward and the pressure block is in press against the focus adjusting shaft 6, when the focus hand wheel 5 is turned, the focus adjusting shaft 6 rotates, and the focus tube 3 can slide on the slide plate B15 driven by the friction resistance between the focus adjusting shaft 6 and the outer side of the slide plate B15, so as to realize the up and down lifting movement of the focus tube 3 in the central cavity of the focus seat 1, and the focus tube 3 rises when the focus hand wheel 5 rotates forward, and falls when the focus hand wheel 5 rotates reversely, thereby achieving the purpose of focusing.

[0039] like Figure 1 , Figure 2 and Figure 4 As shown, it also includes a joint fastening screw 16, which is arranged on one side of the joint 2. A spring piece 21 is installed on the inner circle of the joint 2. The joint fastening screw 16 passes through the joint and is pressed against the outside of the spring piece 21. When the joint fastening screw 16 is tightened, the joint fastening screw 16 presses the spring piece 21 inward, so that the spring piece 21 fixes the eyepiece (not shown in the figure).

[0040] like Figure 1 , Figure 2 and Figure 4As shown, a positioning bolt 18 is arranged above the adjusting bolt 17, and the front end of the positioning bolt 18 is tightly against the slide plate B15. The positioning bolt 18 is tightened inward to keep the focusing tube 3 in a fixed position.

[0041] like Figures 1 to 4 As shown, the focusing connector 4 connects the optical focuser of the astronomical telescope to other types of telescopes.

[0042] like Figure 2 As shown, the two pulleys are distributed up and down, and the center lines of the two pulleys are longitudinally on the same vertical line.

[0043] like Figure 4 As shown, it also includes a connection seat fixing screw 19, and the connection seat fixing screw 19 is arranged from bottom to top, and the focusing connection seat 4 is fixed to the focusing tube 3 through the connection seat fixing screw 19.

[0044] like Figure 4 and Figure 5 As shown, the inner hole of the joint 2 is aligned with the eyepiece hole 9, the inner wall of the focusing seat 1 and the inner hole of the focusing connecting seat 4 form a central channel, the focusing tube 3 is arranged in the central channel, and the inner hole of the focusing connecting seat 4 matches the outer diameter of the focusing tube 3.

[0045] like Figure 4 , Figure 5 and Figure 7 As shown, different degrees of forward twisting produce different degrees of tight contact between the block and the focus adjustment shaft 6, so that the adjusting bolt 17 is used to adjust the lightness or heaviness of the focus tube 3 when it is raised or lowered, to meet the needs of different customers for the lightness or heaviness of the feel.

[0046] like Figure 5 , Figure 6 and Figure 7 As shown, the interference fit produced by the tight fit between the inner side of the pulley and the outer side surface of the slide plate A12, and the interference fit produced by the tight fit between the outer side surface of the slide plate B15 and the inner side of the focus adjustment shaft 6, make the focusing barrel press against the pulley and the focus adjustment shaft, increase the stability of the system, ensure the relative fixation between the focusing seat 1 and the focusing tube 3, and make the focusing tube 3 move up and down in the central cavity of the focusing seat 1 under the adjustment of the focusing hand wheel 5.

[0047] The embodiments described above are only preferred implementations of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical focuser for an astronomical telescope, comprising a focus seat, a joint, a focus barrel, a focus connection seat, a focus hand wheel, and a focus adjustment shaft; the joint is arranged above the focus barrel, and the focus connection seat is arranged below the focus barrel; the focus seat is an integrated structure, comprising a focus barrel penetration portion at the rear side and a focus adjustment shaft penetration portion at the front side; the center of the focus barrel penetration portion is a focus seat central cavity arranged in a vertical direction; the focus barrel is movably penetrated in the focus seat central cavity up and down, and the center of the focus barrel is an eyepiece hole; The focus adjustment shaft penetration portion is laterally provided with a focus adjustment shaft penetration hole, and a groove is provided on the focus adjustment shaft penetration portion; the focus adjustment shaft is horizontally rotatably arranged in the focus adjustment shaft penetration hole; the characteristics are: Two sliding seats are arranged on the rear side of the central cavity of the focusing seat and on the focusing tube penetration part; Two slide seats A are longitudinally arranged at the rear side of the focusing barrel, and each of the two slide seats A is provided with a slide A, and the slide A is fixed to the slide seat A of the focusing barrel by adhesive bonding; two pulleys are arranged between each slide seat A and the slide A, and the pulley shafts of the pulleys are fixedly arranged on the side walls of the slide seat, and the inner sides of the pulleys are tightly matched with the outer sides of the slide A; when the focusing barrel is lifted up and down in the central cavity of the focusing seat, the pulleys rotate on the pulley shafts driven by the friction resistance between the inner sides of the pulleys and the outer sides of the slide A; A slide plate seat B is arranged on the front side of the focusing tube, a slide plate B is arranged on the slide plate seat B, and the slide plate B is fixed to the slide plate seat B of the focusing tube by adhesive; a pressure block is arranged on the groove of the focus adjustment shaft penetration portion, the inner side of the pressure block is tightly matched with the outer side of the focus adjustment shaft, and the outer side surface of the slide plate B is tightly pressed against the inner side of the focus adjustment shaft; a bolt through hole is arranged on the front side of the focus adjustment shaft penetration portion, an adjusting bolt is arranged in the bolt through hole, and the front end of the adjusting bolt is tightly pressed against the middle part of the outer side of the pressure block.

2. The optical focuser of an astronomical telescope according to claim 1, characterized in that: It also includes a joint fastening screw, which is arranged on one side of the joint. A spring piece is installed on the inner circle of the joint. The joint fastening screw passes through the joint and presses on the outside of the spring piece. When the joint fastening screw is tightened, the joint fastening screw presses the spring piece inward, so that the spring piece fixes the eyepiece.

3. The optical focuser of an astronomical telescope according to claim 1, characterized in that: A positioning bolt is arranged above the adjusting bolt, the front end of which is tightly against the slide plate B, and the positioning bolt is tightened inwardly to keep the focusing tube in a fixed position.

4. The optical focuser of an astronomical telescope according to claim 1, characterized in that: The focusing connection seat connects the optical focuser of the astronomical telescope to other types of telescopes.

5. The optical focuser of an astronomical telescope according to claim 1, characterized in that: The two pulleys are distributed up and down, and the center lines of the two pulleys are longitudinally on the same vertical line.

6. The optical focuser of an astronomical telescope according to claim 1, characterized in that: It also includes a connecting seat fixing screw, which is arranged from bottom to top, and the focusing connecting seat is fixed to the focusing tube through the connecting seat fixing screw.

7. The optical focuser of an astronomical telescope according to claim 1, characterized in that: The inner hole of the joint is aligned with the eyepiece hole, the inner wall of the focusing seat and the inner hole of the focusing connecting seat form a central channel, the focusing tube is arranged in the central channel, and the inner hole of the focusing connecting seat matches the outer diameter of the focusing tube.

8. The optical focuser of an astronomical telescope according to claim 1, characterized in that: The degree of forward twisting will produce different degrees of tightness between the block and the focus adjustment shaft. This adjusting bolt is used to adjust the lightness or heaviness of the focus tube when it is raised or lowered.

9. The optical focuser of an astronomical telescope according to claim 1, characterized in that: The interference fit produced by the tight fit between the inner side of the pulley and the outer side of the slide A and the interference fit produced by the tight fit between the outer side of the slide B and the inner side of the focus adjustment shaft causes the focusing barrel to be pressed against the pulley and the focus adjustment shaft.

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