CN220323610U - Filter drawer - Google Patents

Abstract

The utility model relates to the technical field of astronomical photography, and provides a filter drawer, which comprises a shell and a drawer support, wherein the shell is detachably connected with the drawer support, the shell and the drawer support are both in annular arrangement, a notch is formed in the top of the shell, and the drawer support can pass through the notch of the shell and is embedded into the shell, so that the technical problems that the structure is unreasonable and cannot be compatible with various filter specifications in the prior art are solved.

Description

Filter drawer

Technical Field

The utility model relates to the technical field of astronomical photography, in particular to a filter drawer.

Background

In astronomical photography, the installation of a filter with a specific transmission band at the front end of a camera is an effective means for obtaining an enhanced image with special frequency band characteristics. In general, the filter is required to be replaced when shooting different celestial bodies. There are many ways to replace the filter and many disadvantages.

The conventional filter replacement device has 3 types:

the first is that the front end of the astronomical camera is reserved with a filter screw thread, the astronomical camera needs to be detached from the telescope, the rotary filter is unscrewed from the camera screw thread, a new filter is screwed to the front end of the camera, and finally the camera is installed back to the telescope. The method is complex in steps, and when the camera is disassembled and then is reloaded, accurate resetting cannot be performed strictly according to the rotation angle before the disassembly, so that a certain deviation exists in the view direction of the shot image.

The second is a porous filter frame, a plurality of filters are fixed in the hole positions of the filter frame, when the filters need to be replaced, the filters to be used are pushed to the center of a light path, and other filters are exposed outside the filter frame. Although this kind of mode has solved the loaded down with trivial details problem of change filter step, because structural design needs both sides opening, can not be totally airtight, the parasitic light can get into from both sides opening part, influences shooting effect. In addition, the filter exposed outside for a long time is easy to fall ash and stain, and the shooting effect is also affected when the filter is used next time.

The third is a single hole site filter drawer, typically compatible with 2 inch filters, screw gauge M48X0.75, which still suffers from the following 4 disadvantages:

1. there are also common 1.25 inch filters that are not compatible with a variety of filter specifications.

2. The filter is not fixed stably enough, and the problem of shaking possibly occurs in the shooting process, so that shooting definition is affected.

3. The special requirements of a dual sensor camera are not considered, which requires that the primary sensor use a filter and the secondary sensor not use a filter.

4. The rotation angle problem when connecting with other astronomical devices is not considered.

Disclosure of Invention

The utility model aims to provide a filter drawer which at least solves the technical problems that the structure is unreasonable and cannot be compatible with various filter specifications in the prior art. The preferred technical solutions of the technical solutions provided by the present utility model can produce a plurality of technical effects described below.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a filter drawer which comprises a shell and a drawer support, wherein the shell is detachably connected with the drawer support, the shell and the drawer support are all in annular arrangement, a notch is formed in the top of the shell, and the drawer support can penetrate through the notch of the shell and is embedded into the shell.

According to the filter drawer provided by some embodiments of the application, the drawer support comprises a first connecting portion and a second connecting portion, and a plurality of locking positioning holes are correspondingly formed in one end face of the shell and one end face of the first connecting portion.

According to the filter drawer provided by some embodiments of the application, three locking positioning holes are formed, and the three locking positioning holes are arranged at the middle part and the two ends of the end face of the first connecting part at intervals.

According to some embodiments of the present application, a filter drawer is provided, wherein the inner wall of the second connecting portion is provided with a filter fixing thread.

According to some embodiments of the application, a filter drawer is provided, filter fixed frame and vice sensor light trap have been seted up respectively to second connecting portion middle part, filter fixed mounting in filter fixed frame department.

According to the filter drawer provided by some embodiments of the application, filter fixing screw holes are formed in the periphery of the filter fixing frame.

According to some embodiments of the present application, a filter drawer further includes a baffle, the baffle is fixedly connected with the first connection portion, the baffle covers the outside of the first connection portion, and when the drawer support is inserted into the housing, the baffle can shield the notch.

According to some embodiments of the present application, a filter drawer further includes a hand screw disposed at a top of the drawer bracket.

According to the filter drawer provided by some embodiments of the application, a plurality of screw holes are formed in the end faces of two sides of the shell at intervals.

According to some embodiments of the application, the filter drawer further comprises a front connecting ring and a rear connecting ring, wherein threads are arranged on the inner walls of the two ends of the shell, and the front connecting ring and the rear connecting ring are connected with the shell through the threads.

One or more technical solutions in the embodiments of the present utility model have at least one of the following technical effects:

the shell is the main part of whole filter drawer, and the filter is fixed in the center of drawer support, and in the drawer support inserted the shell, conveniently install and change the filter, can compatible multiple filter specification, adopts the three-point type locking mode, makes the filter drawer can be stable fix in the shell through locking the glass bead screw in the locating hole and the downthehole, ensures that the filter can not produce rocking of any direction at shooting in-process, guarantees that the filter drawer of astronomical camera use this scheme can steadily shoot clear image.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a schematic illustration of the housing of the present utility model;

FIG. 3 is a schematic view of a drawer bracket of the present utility model;

FIG. 4 is a schematic view of the structure of the front and rear attachment rings of the present utility model;

FIG. 5 is a schematic view of a 2 inch filter holder of the present utility model;

FIG. 6 is a schematic view of a 1.25 inch filter holder of the present utility model;

fig. 7 is a schematic view of a dual sensor camera dedicated filter holder of the present utility model.

In the figure: 1-a housing; 2-drawer supports; 21-a first connection; 22-a second connection; 23-baffle; 24-a light hole of the auxiliary sensor; 25-filter fixing screw holes; 26-a filter fixing frame; 3-glass bead screws; 4, screwing the screw by hand; 5-front ring; 6-rear connecting rings and 7-locking positioning holes; 8-filter fixing threads; 9-screw holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

As shown in fig. 1-7, the filter drawer provided by the utility model comprises a shell 1 and a drawer support 2, wherein the shell 1 is detachably connected with the drawer support 2, the shell 1 and the drawer support 2 are all in annular arrangement, a notch is formed in the top of the shell 1, and the drawer support 2 can penetrate through the notch of the shell 1 and is embedded into the shell 1.

The drawer support 2 is connected with the shell 1 in a detachable mode, the original drawer support 2 is conveniently pulled out of the shell 1 according to shooting requirements and the drawer support 2 required by shooting is placed into the shell 1 through the notch, the shell 1 can be matched with filter drawer supports of different specifications, 2-inch filter supports are shown in fig. 5, 1.25-inch filter supports are shown in fig. 6, and the filter supports are special filter supports for a dual-sensor camera are shown in fig. 7, in the specific implementation, the specifications of the filter supports are not limited to the three specifications, more filter support specifications which are more in line with market trend can be made according to the development direction of the specifications of the filter, the design of the specifications of the multiple filter supports can be compatible with the filter of various specifications on the market, and a user can use all conventional filter specifications for astronomical photography; reducing the additional expense caused by the necessity of changing the filter specifications due to compatibility problems.

Wherein, for the special filter bracket of the dual-sensor camera shown in fig. 7, the special drawer bracket of the dual-sensor camera can ensure that the filter is used by the main sensor and the filter is not used by the auxiliary sensor. Because some filters can darken the image, if the auxiliary sensor uses the filter as the main sensor, the auxiliary sensor can not see enough bright stars to conduct star guiding, so the auxiliary sensor needs to independently open a light port, a filter fixing frame 26 is arranged in the middle of a drawer bracket 2, filter fixing screw holes 25 are arranged around the filter fixing frame 26, an auxiliary sensor light hole 24 is further arranged right above the filter fixing frame 26, an auxiliary sensor light hole is arranged on the bracket, a rectangular filter can be clamped into the filter fixing frame 26, and then screws and gaskets are arranged on the filter fixing screw holes 25 to press the filter.

During concrete implementation, as shown in fig. 3, the drawer bracket 2 comprises a first connecting portion 21 and a second connecting portion 22, the first connecting portion 21 is in a semi-annular arrangement, the second connecting portion 22 is in an annular arrangement, filter fixing threads 8 are arranged on the inner wall of the second connecting portion 22, a filter is fixed through the filter fixing threads 8, a plurality of locking positioning holes 7 are correspondingly formed in one of the end faces of the housing 1 and the first connecting portion 21, and the drawer bracket 2 and the housing 1 are fixed through bead screws 3 in the locking positioning holes 7.

Preferably, as shown in fig. 3, three locking positioning holes 7 are formed, the three locking positioning holes 7 are arranged at intervals at the middle part and two ends of the end face of the first connecting part 21, the glass bead screws 3 are arranged in the locking positioning holes 7 to fix the filter, a three-point locking mode is adopted to ensure that the filter cannot shake in any direction in the shooting process, and the filter drawer of the scheme is used for stably shooting clear images.

In some embodiments, when the casing 1 and the drawer bracket 2 are fixed, a magnet may be used for magnetic attraction fixation instead of screw fixation.

Preferably, the drawer bracket further comprises a baffle plate 23, the baffle plate 23 is fixedly connected with the first connecting portion 21, the baffle plate 23 covers the outer portion of the first connecting portion 21, the size of the baffle plate 23 is larger than a notch at the top of the shell 1, when the drawer bracket 2 is placed in the shell 1, the baffle plate 23 shields a gap at the top, so that the inner portion is sealed, and stray light is prevented from entering from the gap to influence the shooting effect.

Preferably, as shown in fig. 1-3, the drawer support 2 further comprises a hand-screwed screw 4, wherein the hand-screwed screw 4 is arranged at the top of the drawer support 2, so as to facilitate the user to pull out the drawer support 2.

In some embodiments, as shown in fig. 4, the telescope comprises a front connecting ring 5 and a rear connecting ring 6, wherein the inner walls of the two ends of the casing 1 are provided with threads, the front connecting ring 5 and the rear connecting ring 6 are connected with the casing 1 through the threads, the front connecting ring 5 can be connected with the telescope, the rear connecting ring 6 can be connected with the astronomical camera through the threads, and the telescope can be quickly fixed in a threaded mode or a clamping mode, so that the telescope is more convenient and efficient for users to use.

In some embodiments, as shown in fig. 2, a plurality of screw holes 9 are formed on the end surfaces of the front and back sides of the housing 1 at intervals, preferably, six screw holes 9 are formed, and when the front and back devices are connected by using screws, the angle between the front and back devices can be ensured to be consistent. For example, when the front end is connected with the off-axis star guiding device and the rear end is connected with the astronomical camera, the off-axis star guiding device needs to keep the same angle with the astronomical camera to avoid that the prism of the off-axis star guiding device shields the sensor corners of the astronomical camera as far as possible, and the number of screw holes 9 is not limited to 6 in the concrete implementation process, and can be set to be more than or less than 6 according to actual conditions.

In the description of the present utility model, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc., refer to an orientation or positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a filter drawer, its characterized in that includes shell and drawer support, the shell with drawer support can dismantle the connection, the shell with drawer support all is annular setting, the breach has been seted up at the top of shell, drawer support can be passed through the breach embedding in the shell.

2. The filter drawer according to claim 1, wherein the drawer support comprises a first connecting portion and a second connecting portion, and a plurality of locking positioning holes are correspondingly formed in one end face of the housing and one end face of the first connecting portion.

3. The filter drawer according to claim 2, wherein three locking and positioning holes are formed, and the three locking and positioning holes are formed in the middle and two ends of the end face of the first connecting portion at intervals.

4. The filter drawer of claim 2, wherein the inner wall of the second connection portion is provided with filter fixing threads.

5. The filter drawer according to claim 2, wherein a filter fixing frame and a sub sensor light hole are respectively formed in the middle of the second connecting portion, and a filter is fixedly mounted at the filter fixing frame.

6. The filter drawer according to claim 5, wherein filter fixing screw holes are formed around the filter fixing frame.

7. The filter drawer of claim 2, further comprising a baffle fixedly connected to the first connection portion, the baffle covering the exterior of the first connection portion, the baffle being adapted to block the gap when the drawer support is inserted into the housing.

8. The filter drawer of claim 1, further comprising a hand screw disposed on top of the drawer frame.

9. A filter drawer according to any one of claims 1 to 6, wherein the end surfaces of the two sides of the housing are provided with a plurality of screw holes at intervals.

10. The filter drawer of claim 1, further comprising a front connector and a rear connector, wherein the inner walls of the two ends of the housing are each provided with threads, and the front connector and the rear connector are connected to the housing by threads.