CN202471577U

CN202471577U - Light shield component

Info

Publication number: CN202471577U
Application number: CN2012200384188U
Authority: CN
Inventors: 滕军; 黄衍宏; 佟增亮; 王福山; 刘树哲; 赵来源
Original assignee: Kaimai (luoyang) Ltd Measuring Ring
Current assignee: Kaimai (luoyang) Ltd Measuring Ring
Priority date: 2011-11-30
Filing date: 2012-02-07
Publication date: 2012-10-03
Anticipated expiration: 2022-02-07

Abstract

The utility model discloses a light shield component which comprises a rotating shaft which is rotationally assembled on a base, wherein a light shield which extends along the axial direction and is used for cutting off a stray light path is fixedly inserted into the rotating shaft. During specific application, when rotating to the position where the stray light path is cut off, the light shield is in an operating state, so that lens pollution caused by stray light received by an optical receiver is prevented and when the light shield is not used, the light shield is rotated to other positions and is conveniently protected.

Description

A kind of shadow shield assembly

Technical field

The utility model relates to a kind of shadow shield assembly of visibility standards device, belongs to the meteorologic instrument field.

Background technology

Visibility is one of important elements of meteorological observation, refers to the critical distance that the normal eye can see, not only is used for meteorological observation department, and is widely used in fields such as aviation, navigation, highway, military affairs and environmental monitoring.At traffic and transport field, especially in the air transportation, visibility has directly reflected pilot's visual range size, is one of important meteorological element of flight safety; In the environmental monitoring field, visibility is people's first direct reactions to the atmospheric pollution situation, and as a characteristic quantity of atmospheric pollution level, its measurement has received widely and having paid attention to; In military field, accurately observing and predicting of visibility also is one of indispensable meteorological element in army's military operation, and in a word, visibility all has very big influence to each field.

Along with improving constantly of automaticity; The observation of visibility changes Instrument observation into by range estimation; Simultaneously along with the demand of transmittance meter is urgent further, the measuring accuracy of the transmittance meter important that also seems, existing transmittance meter mainly is made up of optical transmitting set and optical receiver; The light emission port of optical transmitting set and the light-receiving mouth of optical transmitting set are oppositely arranged; The light beam that receives of the light beam that sends of optical transmitting set and optical receiver intersects to form a sample region like this, but the edge line of light emission port and light-receiving mouth has formed the parasitic light path, and optical receiver can receive by the luminotron of optical transmitting set and the surperficial parasitic light of emission camera lens; This parasitic light is received the back by optical receiver and forms additional zero, and changes with the camera lens pollution of optical receiver.

The utility model content

The purpose of the utility model provides a kind of shadow shield assembly that can cut off the parasitic light that optical transmitting set sends.

The utility model adopts following technical scheme: a kind of shadow shield assembly, comprise being used to rotate the rotating shaft that is assemblied on the base, and fixedly be fitted with the shadow shield that is used to cut off the parasitic light path that extends along its axial direction in the rotating shaft.

Said rotating shaft is provided with at shadow shield and turns to when cutting off the parasitic light via positions detent mechanism to the shadow shield location; Said detent mechanism comprises endwisely slipping and is sleeved on the stop cover near the one of which end position in the rotating shaft, offers on the end end face of stop cover near shadow shield on the breach that cooperates with the shadow shield slide-and-guide, the other end end face and is fixed with the register pin that cooperates with the base inserting that overlaps axial direction extension along stop.

Being positioned at stop in the said rotating shaft is set with the stop cover is applied the stage clip that makes the acting force that register pin moves towards base.

Said rotating shaft is rotated through two axle beds that are rotatably assorted with it and is assemblied on the base, and said register pin cooperates with the base inserting through the axle bed corresponding with it.

Adopt the shadow shield assembly of said structure, fixedly be fitted with the shadow shield that extends along its axial direction in the rotating shaft of shadow shield assembly, when specifically working; Rotating shaft is rotated and to be assemblied on the base, and shadow shield is along with rotating shaft is rotated together, when shadow shield turn to be in when cutting off the parasitic light via positions in running order; Prevented that like this optical receiver from receiving parasitic light and causing camera lens to pollute; When shadow shield is not worked, turn to other position, be convenient to the protection of shadow shield.

Description of drawings

Fig. 1 is the example structure synoptic diagram of the utility model;

Fig. 2 is the working state schematic representation of the utility model;

Fig. 3 is the hidden state synoptic diagram of the utility model;

Fig. 4 is the fundamental diagram of the utility model.

Embodiment

The embodiment of the shadow shield assembly of the utility model: as shown in Figure 1, comprise rotating shaft 3, fixedly be fitted with the shadow shield 1 that extends along its axial direction in the rotating shaft 3.

Like Fig. 2, Fig. 3, shown in Figure 4; When specifically being applied on the visibility standards device; Rotating shaft 3 is installed in the groove of base 8, and whole shadow shield assembly is between optical transmitting set 7 and optical receiver 10, and the zone of light beam between two mount pads that light beam that optical transmitting set 7 sends and optical receiver 10 receive crosses and form sample region 9; The upper limb line of light emission port and light-receiving mouth and lower edge line form the path of parasitic light, and said shadow shield 1 is positioned at the below of the light beam that optical transmitting set 7 sends.Shadow shield 1 rotates with rotating shaft 3, when shadow shield 1 turns to vertically up the position, is duty, when shadow shield 1 turns in the groove, is stashed, and this groove is as the holding tank that holds shadow shield 1.

The two ends of said rotating shaft 3 are provided with the preceding axle bed 5 and back axle bed 2 that is rotatably assorted with rotating shaft 3, and preceding axle bed 5 is separately fixed on the groove cell wall of base 8 with back axle bed 2.

Can locate when making shading 3 plates in running order; Be positioned at front axle seat 5 inner shafts in the said rotating shaft 3 and a stop cover 4 be housed to slip cap; Offer on the end face near shadow shield 1 one ends of stop cover 4 on the end face of the breach that cooperates with shadow shield 1 slide-and-guide, the other end and be fixed with two along its axial direction extension register pin; This breach is joined shadow shield 1 and stop cover 4 cards when shadow shield 1 rotates; Therefore can drive stop cover 4 rotates together; Offer the pilot hole 6 that when shadow shield 1 is in running order, cooperates before said on the axle bed 5, rely on the card of breach and shadow shield 1 to be equipped with and the card of register pin and pilot hole 6 is joined and can be guaranteed that shadow shield 1 locatees when in running order with two register pin insertings, and stop overlap be arranged with in 4 to stop overlap 4 apply the acting force that moves towards preceding axle bed 5 stage clip.

The foregoing description when shadow shield 1 is in running order, has cut off the path of parasitic light in concrete application process; At this moment, the pilot hole 6 of axle bed 5 before register pin is positioned at is when quitting work; Overcoming stage clip acting force promotion stop cover 4 makes register pin break away from pilot hole 6; Shadow shield 1 can not be located, and rotates shadow shield 1 then it is stashed in holding tank, convenient installation, placement and transportation.

Claims

1. a shadow shield assembly is characterized in that: comprise being used to rotate the rotating shaft that is assemblied on the base, fixedly be fitted with the shadow shield that is used to cut off the parasitic light path that extends along its axial direction in the rotating shaft.

2. shadow shield assembly according to claim 1; It is characterized in that: said rotating shaft is provided with at shadow shield and turns to when cutting off the parasitic light via positions detent mechanism to the shadow shield location; Said detent mechanism comprises endwisely slipping and is sleeved on the stop cover near the one of which end position in the rotating shaft, offers on the end end face of stop cover near shadow shield on the breach that cooperates with the shadow shield slide-and-guide, the other end end face and is fixed with the register pin that cooperates with the base inserting that overlaps axial direction extension along stop.

3. shadow shield assembly according to claim 2 is characterized in that: be positioned at stop in the said rotating shaft and be set with the stop cover is applied the stage clip that makes the acting force that register pin moves towards base.

4. according to claim 2 or 3 described shadow shield assemblies, it is characterized in that: said rotating shaft is rotated through two axle beds that are rotatably assorted with it and is assemblied on the base, and said register pin cooperates with the base inserting through the axle bed corresponding with it.