Filter switching device with good stability

Abstract

The utility model relates to a filter switching device with good stability, which comprises an upper cover and a bottom cover, and the inner side walls of the upper cover and the bottom cover are respectively provided with a filter switching assembly and a light transmitting port which are opposite front and back; the filter switching assembly comprises a lens tray used for installing a lens, a guide column arranged in parallel with the lens tray side by side, and a driving unit used for driving the tray to move back and forth along the guide column. The lens tray is provided with a first extending part and a second extending part which face the guide column, the first extending part and the second extending part are provided with a first C-shaped section and a second C-shaped section respectively, the concave surface of the first C-shaped section abuts against the guide column on the side, away from the lens tray, of the guide column, and the concave surface of the second C-shaped section abuts against the guide column on the side, close to the lens tray, of the guide column; the tail end of the first C-shaped section is also provided with a horizontal extension section extending towards a square direction deviating from the lens tray; the concave surfaces of the first C-shaped section and the second C-shaped section abut against the guide column, so that the situation that the guide column shakes in the length direction of the first extending part due to the fact that the gap is too large can be prevented.

Description

Technical Field

[0001] The utility model relates to the field of camera technology, in particular to a filter switching device with good stability. Background Art

[0002] The IR CUT (dual filter) spring assembly is a component installed in the IR CUT. It is an auxiliary tool for switching the IR CUT (filter). It is suitable for security surveillance cameras with this type of IR-CUT. At present, this type of IR-CUT dual filter refers to a set of filters built into the camera lens group. When the infrared sensing point outside the lens detects the change in the intensity of the light, the built-in IR-CUT motor switches the filter to automatically switch according to the intensity of the external light, so that the image can achieve the best effect. In other words, the dual filter can automatically switch the filter during the day or at night, so that the best imaging effect can be obtained regardless of whether it is day or night.

[0003] However, in the current multi-filter assembly, such as the filter switcher [CN220137532U] previously applied by the patentee, when the lens tray switches back and forth in the spring on the motor, since the end of the lens tray close to the first guide member is not well guided and limited, it is only achieved by slightly clamping the first guide member through the first engaging member bent on the tray. This clamping and guiding method causes the tray to shake during the reciprocating motion switching process due to the large gap in the length square of the first engaging member, and the guiding effect is not ideal. Therefore, we further propose a filter switching device with good stability. Utility Model Content

[0004] The purpose of the utility model is to provide a filter switching device with good stability in view of the deficiencies in the prior art, and the filter switching device with good stability can well solve the above-mentioned problems.

[0005] In order to achieve the above requirements, the technical solution adopted by the utility model to solve its technical problems is:

[0006] A filter switching device with good stability is provided, comprising an upper cover and a bottom cover, wherein the inner side walls of the upper cover and the bottom cover are both provided with filter switching components and light transmission ports facing each other front and back; the filter switching component comprises a lens tray for mounting lenses, and a guide column arranged parallel to the lens tray, and a driving unit for driving the tray to reciprocate along the guide column; the lens tray is provided with a first extension portion and a second extension portion facing the guide column, the first extension portion and the second extension portion are respectively provided with a first C-shaped segment and a second C-shaped segment, the concave surface of the first C-shaped segment abuts against the guide column on the side of the guide column away from the lens tray, and the concave surface of the second C-shaped segment abuts against the guide column on the side of the guide column close to the lens tray; the end of the first C-shaped segment is also provided with a horizontal extension segment extending towards a square away from the lens tray.

[0007] The filter switching device with good stability described in the utility model, wherein the first extension part and the second extension part form a unit, and the unit is provided with two and arranged side by side in a square along the length of the guide column.

[0008] The filter switching device with good stability described in the utility model, wherein the first C-shaped section is located at the lower side of the first extension portion.

[0009] The filter switching device with good stability described in the utility model, wherein the concave surfaces of the first C-shaped section and the second C-shaped section are both provided with Teflon coatings.

[0010] The filter switching device with good stability described in the utility model, wherein the driving unit is a miniature motor, a spiral rib is coaxially fixed on the rotating shaft of the motor, a third extension portion facing the rotating shaft is provided on the lens tray, a positioning hole adapted to the rotating shaft is provided on the third extension portion, and the positioning hole passes through one end of the third extension portion away from the lens tray.

[0011] The filter switching device with good stability described in the utility model, wherein a positioning groove for positioning the lens is provided on one side surface of the lens tray, and two windows are arranged side by side on the bottom surface of the positioning groove.

[0012] The filter switching device with good stability described in the utility model, wherein a groove is further provided on the side wall of the lens tray on the same side as the positioning groove, the groove is directly connected to the positioning groove, and at least two grooves are connected on the two opposite side walls of the positioning groove.

[0013] The beneficial effect of the utility model is that when the lens tray reciprocates along the guide post under the driving action of the driving mechanism, the two concave surfaces on the first extension part and the second extension part are respectively fitted and pressed against the guide post on two opposite sides of the guide post, so that the guide post can form a pulling force and a supporting force on the lens tray, thereby preventing the guide post from shaking too much in the length direction of the first extension part, thereby greatly improving the stability of switching of the lenses on the lens tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0015] Figure 1 This is an explosion state diagram of the filter switching device of the utility model with good stability.

[0016] Figure 2 yes Figure 1 A magnified diagram of the filter switching component.

[0017] Figure 3 yes Figure 2 A magnified view of the local structure.

[0018] Figure 4 yes Figure 3 Specific structural diagram of the first extension part and the second extension part. DETAILED DESCRIPTION

[0019] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0022] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0024] The filter switching device with good stability in the preferred embodiment of the utility model is as follows Figure 1-4 As shown, it includes an upper cover 10 and a bottom cover 20 connected thereto, and the upper cover 10 and the bottom cover 20 enclose a mounting cavity. The inner side walls of the upper cover 10 and the bottom cover 20 are provided with a filter switching assembly 30 and a light transmission port 40 facing each other front and back. The filter switching assembly 30 includes a lens tray 31 for mounting a lens 50, a guide post 32 arranged side by side and parallel to the lens tray 31, and a driving unit 33 for driving the tray to reciprocate along the guide post 32. Among them, the lens tray 31 is made of metal. The driving unit 33 and the guide post 32 are respectively located on two opposite sides of the lens 50 bracket. The lens tray 31 is provided with a first extension portion 311 and a second extension portion 312 facing the guide post 32, and the first extension portion 311 and the second extension portion 312 are both punched and formed integrally with the lens tray 31.

[0025] Furthermore, the first extension portion 311 and the second extension portion 312 are respectively provided with a first C-shaped segment 11a and a second C-shaped segment 12a. The concave surface 200 of the first C-shaped segment 11a abuts against the guide post 32 at the side of the guide post 32 away from the lens tray 31, and the concave surface 200 of the second C-shaped segment 12a abuts against the guide post 32 at the side of the guide post 32 close to the lens tray 31. Specifically, the width of the opening of the first C-shaped segment 11a and the second C-shaped segment 12a is smaller than the diameter of the guide post 32, so as to facilitate the guide post 32 to be clamped in the cavity formed by the concave surface 200. The end of the first C-shaped segment 11a is also provided with a horizontal extension segment 60 extending toward the square away from the lens tray 31 to support the guide post 32. In addition, a bending portion 121 bent toward the bottom surface of the bottom cover 20 is provided on the second extension portion 312 at the side of the second C-shaped segment 12a facing the lens tray 31.

[0026] When the lens tray 31 moves back and forth along the guide post 32 under the driving action of the driving mechanism, the two concave surfaces 200 on the first extension part 311 and the second extension part 312 are respectively fitted and pressed against the guide post 32 on two opposite sides of the guide post 32, thereby avoiding the existence of a gap. The guide post 32 can form a pulling force and a supporting force on the lens tray 31, thereby preventing the guide post 32 from shaking too much in the length direction of the first extension part 311, thereby greatly improving the stability of switching of the lens 50 on the lens tray 31.

[0027] In this embodiment, the first extension portion 311 and the second extension portion 312 form a unit, and the unit is provided with two squares arranged side by side along the length of the guide column 32, which can further position and constrain the two ends of the lens tray 31 along the guide column 32, and can further improve the stability of the lens tray 31 during movement.

[0028] In this embodiment, the first C-shaped segment 11a is located at the lower side of the first extension portion 311 to support the guide post 32. Furthermore, the concave surfaces 200 of the first C-shaped segment 11a and the second C-shaped segment 12a are both provided with Teflon coatings (not shown) to reduce friction with the guide post 32 and further improve the stability of the movement of the lens tray 31.

[0029] In this embodiment, the driving unit 33 is a miniature motor, and a spiral rib 70 is coaxially fixed on the rotating shaft 331 of the motor. The lens tray 31 is provided with a third extension portion 313 facing the rotating shaft 331, and the third extension portion 313 is provided with a positioning hole 80 adapted to the rotating shaft 331. The positioning hole 80 passes through the end of the third extension portion 313 away from the lens tray 31 to facilitate the installation of the rotating shaft 331 into the positioning hole 80. When the rotating shaft 331 rotates, the spiral rib 70 is driven to rotate, and then the lens tray 31 can be pushed back and forth along the guide column 32 through the pushing action of the spiral rib 70 on the third extension portion 313.

[0030] In this embodiment, a positioning groove 310 for positioning the lens 50 is provided on one side surface of the lens tray 31, and two windows 101 are arranged side by side on the bottom surface of the positioning groove 310, so that the four lenses 50 on the two filter assemblies can be respectively opposite to each other to form four combinations. Furthermore, a lens 50 covering the light-transmitting opening 40 is also provided on the upper cover 10, and the above four combinations can form five spectrum switchings together, which has higher adaptability. Furthermore, a groove 90 is also provided on the side wall of the lens tray 31 on the same side as the positioning groove 310, and the groove 90 is directly connected to the positioning groove 310. At least two grooves 90 are connected on the two opposite side walls of the positioning groove 310. The provision of the groove 90 can facilitate dripping glue into the gap between the lens 50 and the bottom surface of the positioning groove 310 after the lens 50 is installed, so as to avoid the glue overflowing into the surface of the lens 50 and causing contamination.

[0031] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A filter switching device with good stability, characterized in that: It comprises an upper cover and a bottom cover, and the inner side walls of the upper cover and the bottom cover are provided with filter switching components and light transmission ports facing each other front and back; the filter switching component comprises a lens tray for mounting lenses, and a guide column arranged parallel to the lens tray, and a driving unit for driving the tray to reciprocate along the guide column; the lens tray is provided with a first extension portion and a second extension portion facing the guide column, and the first extension portion and the second extension portion are respectively provided with a first C-shaped segment and a second C-shaped segment, the concave surface of the first C-shaped segment abuts against the guide column on the side of the guide column away from the lens tray, and the concave surface of the second C-shaped segment abuts against the guide column on the side of the guide column close to the lens tray; the end of the first C-shaped segment is also provided with a horizontal extension segment extending towards a square away from the lens tray.

2. The filter switching device with good stability according to claim 1, characterized in that: The first extension part and the second extension part form a unit, and the unit is provided with two and arranged side by side in a square along the length of the guide column.

3. The filter switching device with good stability according to claim 2, characterized in that: The first C-shaped section is located at a lower side of the first extension portion.

4. The filter switching device with good stability according to any one of claims 1 to 3, characterized in that: The concave surfaces of the first C-shaped segment and the second C-shaped segment are both provided with Teflon coatings.

5. The filter switching device with good stability according to claim 1, characterized in that: The driving unit is a miniature motor, a spiral rib is coaxially fixed on the rotating shaft of the motor, a third extension portion facing the rotating shaft is provided on the lens tray, a positioning hole adapted to the rotating shaft is provided on the third extension portion, and the positioning hole passes through one end of the third extension portion away from the lens tray.

6. The filter switching device with good stability according to claim 1, characterized in that: A positioning groove for positioning the lens is arranged on one side surface of the lens tray, and two windows are arranged side by side on the bottom surface of the positioning groove.

7. The filter switching device with good stability according to claim 6, characterized in that: A groove is further provided on the side wall of the lens tray on the same side as the positioning groove, and the groove is directly connected to the positioning groove. At least two grooves are connected on two opposite side walls of the positioning groove.

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