Asymmetric transmission mechanism

Abstract

An asymmetric transmission mechanism belongs to the technical field of optical filter switching and comprises a base, a moving piece and a rocker, a sliding rail structure is arranged on the base and used for arranging the moving piece and guiding the moving piece to move, a center column is arranged on the base and used for arranging the rocker, the rocker can swing around the center column, and a limiting structure is arranged on the base and used for limiting the moving piece. The limiting structure is used for limiting the movement range of the moving piece and the rocker, the moving piece is provided with a strip-shaped hole, the rocker is provided with a transmission key, the transmission key penetrates through the strip-shaped hole, and the rocker drives the moving piece to move through the transmission key when swinging. The symmetry axis of the motion trail of the transmission key is not parallel to the approximate symmetry axis of the motion trail of the moving piece. According to the optical filter switcher, the static stability of the optical filter switcher under a certain switching gear can be improved, and the space utilization rate in the optical filter switcher is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of filter switching, and mainly relates to a transmission mechanism. BACKGROUND

[0002] The filter switcher is mainly composed of a shell, a moving piece carrying filters and a driving mechanism, the moving piece is driven by the driving mechanism to move, the filter switcher changes the spectral range of incident light and the imaging effect of a photosensitive chip. The filter switcher on a moving carrier is easily disturbed by external factors such as vibration or impact, and the filter switcher is required to have large static stability to avoid error switching.

[0003] Since the vibration or impact received by the moving carrier usually has asymmetry in the gravity direction, for the filter switcher with the moving piece moving in the gravity direction, the scheme of simultaneously increasing the same static stability for two switching positions of each moving piece wastes the space inside the filter switcher. SUMMARY

[0004] In view of the above problems in the prior art scheme, the utility model provides an asymmetric transmission mechanism.

[0005] The utility model discloses a technical scheme that solves its technical problems: provide an asymmetric transmission mechanism, including base, moving piece, rocker, the base is equipped with slide rail structure, the slide rail structure is used for setting moving piece and guiding moving piece moves, the base is equipped with center column, the center column is used for setting rocker, and the rocker can swing around center column, the base is equipped with limit structure, and the limit structure is used for limiting the movement range of moving piece and rocker, the moving piece is equipped with strip hole, the rocker is equipped with transmission key, and the transmission key is arranged in strip hole, when the rocker swings, the transmission key drives moving piece to move.

[0006] Further preferred scheme of the utility model is: the symmetry axis of the motion track of the transmission key is not parallel to the approximate symmetry axis of the motion track of the moving piece.

[0007] The utility model has the advantages of:

[0008] (1) under similar conditions, compared with the conventional transmission mechanism, the utility model can increase the static stability of the filter switcher at certain switching position.

[0009] (2) under similar conditions, compared with the symmetric transmission mechanism of increasing static stability, the utility model can improve the space utilization rate of the filter switcher. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1The utility model discloses a structure schematic view.

[0011] Figure 2 The utility model discloses an explosion structure schematic view.

[0012] Figure 3 The utility model discloses the movement locus schematic view of movable part.

[0013] The drawing mark explanation is explained: 10 - base, 11 - slide rail structure, 12 - center column, 13 - limit structure, 20 - moving piece, 21 - strip hole, 22 - the movement locus of moving piece, 30 - rocker, 31 - transmission key, 311 - the movement locus of transmission key. DETAILED DESCRIPTION

[0014] The utility model is further explained below with the attached drawing and embodiment. Unless otherwise defined, all technical and scientific terms used in this paper are same with the understanding of the person skilled in the art belonging to the technical field of this application. The term used in the specification of this application in this paper is only for the purpose of describing the specific embodiment, and is not intended to limit this application.

[0015] Please refer to Figure 1 、 Figure 2 、 Figure 3 The utility model relates to a kind of asymmetric transmission mechanism, including base 10, moving piece 20, rocker 30. Base is equipped with slide rail structure 11, and slide rail structure is used to set moving piece and guide moving piece to move;Base is equipped with center column 12, and center column is used to set rocker, and rocker can swing around center column;Base is equipped with limit structure 13, and limit structure is used to limit the movement range of moving piece and rocker. Moving piece is equipped with strip hole 21. Rocker is equipped with transmission key 31, and transmission key is worn in strip hole, and moving piece is moved by transmission key when rocker swings.

[0016] As a specific embodiment: the symmetry axis of the movement locus 311 of transmission key is not parallel with the approximate symmetry axis of the movement locus 22 of moving piece.

[0017] The utility model discloses a working principle: the drive mechanism of filter switcher has certain static stability, and the setting of strip hole is generally perpendicular to the movement track of moving piece. The utility model discloses through the increase of the included angle between strip hole and rocker when moving piece is in all switching gears, when filter switcher is interfered by external force factor under the switching gear, the distance of moving piece pressure to rocker to central column shortens, thereby reduces the interference moment that rocker received, in addition, the pressure angle between moving piece and rocker increases, thereby increases the activity resistance of transmission key in strip hole, above all, the utility model discloses can strengthen the static stability of filter switcher. The utility model makes the static stability of two switching gears of each moving piece be asymmetric setting, avoids the unnecessary increase of the static stability of certain switching gear, can reduce the space occupied by the structure for increasing static stability, and breaks the restriction that the layout of filter switcher internal parts receives, thereby improves the space utilization in filter switcher.

[0018] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to them; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An asymmetric transmission mechanism comprising a base, a moving piece, a rocker, characterized in that: a slide rail structure is arranged on the base, the slide rail structure is used for setting the moving piece and guiding the moving piece to move; a center column is arranged on the base, the center column is used for setting the rocker, and the rocker can swing around the center column; a limiting structure is arranged on the base, the limiting structure is used for limiting the movement range of the moving piece and the rocker; the moving piece is provided with a strip-shaped hole; the rocker is provided with a transmission key, and the transmission key is arranged in the strip-shaped hole; when the rocker swings, the moving piece is driven to move through the transmission key. The symmetric axis of the movement track of the transmission key is not parallel to the approximate symmetric axis of the movement track of the moving piece.

2. A non-symmetrical transmission mechanism according to claim 1, characterized in that: ​

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