Self-locking transmission mechanism

Abstract

A self-locking transmission mechanism belongs to the technical field of optical filter switching and comprises a base, a moving piece and a rocker, the base is provided with a sliding rail structure, a central column and a limiting structure, the moving piece is provided with a strip-shaped hole, the rocker is provided with a transmission key, the transmission key is arranged in the strip-shaped hole in a penetrating mode, and the rocker drives the moving piece to move through the transmission key when swinging. The strip-shaped hole is provided with a self-locking area, and in the process that the transmission key actively enters the self-locking area and subsequently moves in the self-locking area, the included angle between the wall face of the side, away from the center column, of the strip-shaped hole near the transmission key and the rocker is increased to be equal to or larger than a right angle. According to the utility model, the optical filter switcher has a self-locking capability, and a wrong switching phenomenon caused by external interference such as vibration or impact on the moving sheet under a non-driving condition can be avoided.

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 mobile piece carrying a filter, and a driving mechanism, the mobile piece is driven to move by the driving mechanism, 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 prone to vibration or impact, and the filter switcher is required to have self-locking ability after switching to avoid false switching of the filter switcher.

[0003] The existing technical solution mainly sets the strip-shaped hole of the mobile piece into a specific shape, but the solution only increases the activity resistance of the transmission key of the rocker in the retaining area of the strip-shaped hole, increases the margin of the static stability of the filter switcher, but the filter switcher may still have false switching when encountering external interference such as vibration or impact exceeding the static stability. INNOVATION CONTENT

[0004] In view of the above problems in the prior art, the utility model provides a self-locking transmission mechanism.

[0005] The utility model discloses a self-locking transmission mechanism, which comprises a base, a mobile piece and a rocker.

[0006] The further preferred solution of the utility model is that the strip-shaped hole is provided with a self-locking area, and the angle between the wall surface of the strip-shaped hole away from the center column side near the transmission key and the rocker is increased to equal or greater than a right angle during the process of the transmission key actively entering the self-locking area and subsequent movement in the self-locking area.

[0007] The technical innovation of the utility model and the good effect generated are that the utility model can make the filter switcher have self-locking ability, and can avoid the false switching phenomenon of the mobile piece under non-driving conditions due to external interference such as vibration or impact. DRAWING DESCRIPTION

[0008] Figure 1A structure schematic view of the utility model;

[0009] Figure 2 A structure schematic view of the utility model;

[0010] Figure 3 A partial schematic view of a self-locking area of an embodiment of the utility model;

[0011] Figure 4 A partial schematic view of a self-locking state of an embodiment of the utility model;

[0012] Figure 5 A partial schematic view of a self-locking state of an embodiment of the utility model;

[0013] Figure 6 A partial schematic view of a self-locking state of an embodiment of the utility model.

[0014] The figure mark explanation: 10 - base, 11 - slide rail structure, 12 - center column, 13 - limit structure, 20 - moving piece, 21 - strip hole, 211 - self-locking area, 212 - free area, 30 - rocker, 31 - transmission key. DETAILED DESCRIPTION

[0015] The specific embodiments of the utility model of the present application will be described in detail below with reference to the drawings. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0016]

Embodiment 1

[0017] Please refer to Figure 1 、 Figure 2 、 Figure 3 , the utility model relates to a kind of self-locking 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 arranged in strip hole, and rocker swings and moves moving piece by transmission key.

[0018] Strip hole is equipped with self-locking area 211, in the process that transmission key actively enters self-locking area and subsequently moves in self-locking area, the size of the included angle between the wall surface of strip hole far from center column side near transmission key and rocker is increased to equal right angle or greater than right angle.Strip hole non-self-locking area is part of free area 212.

[0019] The working principle of this utility model:

[0020] (1) When the transmission mechanism is subjected to impact under non-driving conditions, the moving plate may have a tendency to switch incorrectly. If, during the last switching, the transmission key actively entered the self-locking zone and during its subsequent movement within the self-locking zone, the angle between the wall of the strip hole near the transmission key on the side away from the central post and the rocker arm increased to a value greater than a right angle, then during the movement of the moving plate in the direction of incorrect switching, the moving plate presses the transmission key, causing the transmission key to tend to move deeper into the self-locking zone. The transmission key remains within the self-locking zone, and the transmission key restricts the movement of the moving plate, so the transmission mechanism will not switch incorrectly.

[0021] (2) When the transmission mechanism is subjected to impact under non-driving conditions, the moving plate may have a tendency to switch motion incorrectly. When the transmission key is initially in the self-locking zone or after movement, the pressure angle between the centroidal wall and the rocker increases to a right angle, the transmission key restricts the movement of the moving plate, and the transmission mechanism will not switch incorrectly.

[0022] (3) When the transmission mechanism is subjected to vibration under non-driving conditions, the moving plate may vibrate in the switching direction. If the transmission key is currently in the self-locking zone, the movement of the moving plate is restricted by the limiting structure or the transmission key in the last switching direction; in the wrong switching direction, the same principle (2) applies, the transmission key remains in the self-locking zone, and the transmission key restricts the movement of the moving plate. In summary, the transmission mechanism will not switch incorrectly.

[0023]

Example 2

[0024] like Figure 4 The diagram shows the self-locking state of a self-locking transmission mechanism, where the general orientation of the centroidal wall of the self-locking zone where the transmission key is located can be a straight line.

[0025]

Example 3

[0026] like Figure 5 The diagram shows the self-locking state of a self-locking transmission mechanism. The general orientation of the centroidal wall of the self-locking zone where the transmission key is located can be a broken line.

[0027]

Example 4

[0028] like Figure 6 The diagram shows the self-locking state of a self-locking transmission mechanism, where the general orientation of the distal wall of the self-locking zone where the transmission key is located can be an arc.

[0029] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the foregoing examples, it will be understood by those of ordinary skill in the art that modifications can be made to the technical solutions described in the foregoing examples, or some or all of the technical features thereof can be replaced equivalently. Such modifications or replacements do not cause the nature of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A self-locking transmission mechanism comprising a base, a moving piece, a rocker, characterized in that: a slide rail structure is arranged on the base, and is used for arranging and guiding the moving piece to move; a center column is arranged on the base, and is used for arranging the rocker, and the rocker can swing around the center column; a limiting structure is arranged on the base, and 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 by the transmission key; wherein the strip-shaped hole is provided with a self-locking area, and in the process that the transmission key is actively entered into the self-locking area and subsequently moves in the self-locking area, the included angle between the wall surface of the strip-shaped hole far away from the center column and the rocker is increased to equal or greater than a right angle. ​ ​ ​ ​ ​ ​ ​

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