Cold screen and extinction plate positioning and bonding device and cold screen

Abstract

The utility model provides a cold shield and light extinction plate positioning bonding device, which comprises a matching base, a first positioning core and a second positioning core, the matching base is used for being matched and installed with the lower end of a cold shield, the first positioning core is fixedly arranged on the front surface of the matching base and used for installing a light extinction plate, and the second positioning core is fixedly arranged on the front surface of the matching base. The second positioning core is fixedly arranged on the front face of the matching base, and the second positioning core operably penetrates through a diaphragm hole in the cold shield and is used for enabling the matching base and the cold shield to be coaxially arranged. According to the cold screen and extinction plate positioning and bonding device, the extinction plate is positioned through the first positioning core, then the cold screen and the matching base are installed together, the second positioning core and the diaphragm hole in the cold screen are installed in a matched mode, the cold screen and the matching base are coaxially matched, and then the extinction plate can be accurately bonded in the cold screen. The mounting precision of the extinction plate is greatly improved, and the cold screen and the extinction plate are prevented from being scratched by sharp tools.

Description

TECHNICAL FIELD

[0001] The utility model relates to infrared detector technical field, in particular to a cold screen and extinction plate positioning bonding device and cold screen. BACKGROUND

[0002] Refrigeration type infrared detector is an important application direction in the development of infrared photoelectric technology, and is widely used in military, space detection and monitoring fields. This type of detector is favored because of its higher sensitivity and temperature resolution. As a key component in the refrigeration type infrared detector, the cold screen is an optical component of the micro-dewar of the refrigeration type infrared detector, located directly above the detector chip, and is composed of a cold screen main body and multiple extinction baffles. Its main function is to limit the light path and absorb the stray light generated inside, thereby effectively reducing the influence of background noise on the imaging quality of the detector.

[0003] The existing cold screen and extinction plate bonding method is as follows:

[0004] 1. Fix the cold screen main body circular hole downward on the measuring equipment;

[0005] 2. Apply adhesive at the bonding position of the cold screen main body;

[0006] 3. Place the extinction baffle on the bonding surface of the cold screen main body, measure the center of the cold screen main body aperture, and adjust the position of the extinction baffle aperture and the cold screen main body aperture with the assistance of the measuring equipment;

[0007] 4. Bond the extinction baffles one by one from small to large according to the number of layers;

[0008] 5. Pre-solidify on the measuring equipment to ensure that the extinction baffle position does not move, and then heat and solidify.

[0009] However, the current cold screen and extinction plate bonding method has the following problems: due to the light absorption characteristics of the cold screen blackening layer paint, the measuring equipment light source is absorbed, the clarity is reduced, and therefore the position of the cold screen main body aperture and the extinction baffle aperture cannot be accurately measured, the bonding precision is not high, and the light path is easily blocked; due to the small space of the cold screen main body, it is difficult to place and adjust the extinction baffle using tweezers in the limited space, and the inner surface of the cold screen baffle or the cold screen main body is easily scratched, causing the blackening layer to fall off and affecting the performance of the cold screen; due to the flowability of the adhesive, the bonded cold screen baffle main body cannot be moved, and heating and solidification can only be performed after pre-solidification. The bonding effect of the cold screen and the extinction plate is not good. UTILITY MODEL CONTENTS

[0010] The utility model provides a cold screen and extinction plate positioning bonding device and cold screen for solving at least one of the above technical problems.

[0011] The utility model provides a cold screen and extinction plate positioning bonding device, including,

[0012] The cooperation base is used for cooperating with the lower end of the cold screen.

[0013] The first positioning core is fixedly arranged on the front surface of the cooperation base and is used for installing the extinction plate.

[0014] The second positioning core is fixedly arranged on the front surface of the cooperation base and is operable to pass through the diaphragm hole on the cold screen and is used for coaxially arranging the cooperation base with the cold screen.

[0015] In an embodiment, the side surface of the cooperation base is provided with at least one first positioning surface for cooperating with the cold screen.

[0016] In an embodiment, the first positioning surface is a plane.

[0017] In an embodiment, the first positioning surface is provided with a scale.

[0018] In an embodiment, the positioning bonding device further comprises a third positioning core fixedly arranged on the first positioning core, and the third positioning core is used for cooperating with the diaphragm hole on the extinction plate.

[0019] In an embodiment, the positioning bonding device further comprises a positioning base provided with a positioning hole, and the positioning base is used for cooperating with the upper end of the cold screen, and the second positioning core is operable to be inserted into the positioning hole.

[0020] In an embodiment, the second positioning core is inserted into the positioning hole by a length range of one fourth to three fourths.

[0021] In an embodiment, the back surface of the cooperation base is fixedly provided with an adjusting rod.

[0022] The utility model further provides a cold screen comprising a cold screen main body, the cold screen main body is cooperatively installed with the positioning bonding device in any one of the above technical solutions, the diaphragm hole is coaxially arranged with the cold screen main body, and the second positioning core is operable to pass through the diaphragm hole.

[0023] In an embodiment, the lower end of the cold screen main body is provided with a second positioning surface, and when the cold screen main body is cooperatively installed with the cooperation base, the second positioning surface is matched with the first positioning surface.

[0024] Compared with the prior art, the cold screen and the matching base are installed together, the second positioning core is installed in cooperation with the diaphragm hole on the cold screen, the cold screen is coaxially matched with the matching base, and then the extinction plate can be accurately adhered inside the cold screen, the installation precision of the extinction plate is greatly improved, and the cold screen and the extinction plate are prevented from being scratched by sharp tools. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model will be described in more detail below based on the embodiments and with reference to the drawings.

[0026] Figure 1 is the structure schematic diagram of the matching base in the cold screen and extinction plate positioning and bonding device provided by the utility model;

[0027] Figure 2 is the structure schematic diagram of the positioning base in the cold screen and extinction plate positioning and bonding device provided by the utility model;

[0028] Figure 3 is the multiple model schematic diagram of the matching base in the cold screen and extinction plate positioning and bonding device provided by the utility model;

[0029] Figure 4 is the installation structure schematic diagram of the positioning base and the cold screen main body in the cold screen and extinction plate positioning and bonding device provided by the utility model;

[0030] Figure 5 is the cooperation state sectional view of the cold screen main body and the extinction plate positioning and bonding device in the utility model;

[0031] Figure 6 is the cooperation state schematic diagram of the first positioning surface and the second positioning surface in the utility model;

[0032] Figure 7 is the extinction plate complete bonding schematic diagram in the utility model;

[0033] Figure 8 is the structure schematic diagram of the cold screen main body in the utility model;

[0034] Figure 9 is the structure schematic diagram of the extinction plate in the utility model.

[0035] REFERENCE SIGNS:

[0036] 11-matching base;12-first positioning core;13-second positioning core;14-first positioning surface;15-third positioning core;16-positioning base;17-positioning hole;18-adjusting rod;

[0037] 20-cold screen main body;21-first diaphragm hole;22-second positioning surface;

[0038] 30 - light extinction plate; 31 - second diaphragm hole. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directionality indications also change accordingly.

[0041] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0042] The utility model will be further described below with reference to the drawings.

[0043] As Figures 1-9 shown, the utility model provides a cold screen and light extinction plate positioning bonding device, include: fit base 11, first positioning core 12 and second positioning core 13, fit base 11 is used for with the cold screen lower end fit installation, first positioning core 12 is fixedly arranged on the front of fit base 11, is used for installing light extinction plate 30, second positioning core 13 is fixedly arranged on the front of fit base 11, second positioning core 13 can be operated and passes through the first diaphragm hole 21 on the cold screen, is used for with the cold screen coaxial arrangement of fit base 11.

[0044] Through first positioning core 12 positioning light extinction plate 30, then install the cold screen with fit base 11 together, make second positioning core 13 with the first diaphragm hole 21 on the cold screen fit installation, make the cold screen with fit base 11 coaxial fit, further make light extinction plate 30 can be accurately bonded in the cold screen, greatly improve the installation precision of light extinction plate 30, and avoid sharp tool to cause the cold screen and light extinction plate 30 to scratch.

[0045] Preferably, as shown in Figure 1 , Figure 6 , at least one first positioning surface 14 is arranged on the side of the matching base 11, when the extinction plate 30 is pasted on the cold screen using the positioning and pasting device, the matching base 11 guarantees the horizontal position relationship between the extinction plate 30 and the cold screen, the first positioning surface 14 is aligned with the cold screen, and the alignment angle between the second diaphragm hole 31 of the extinction plate 30 and the first diaphragm hole 21 on the cold screen is guaranteed, thereby improving the installation accuracy of the extinction plate 30.

[0046] Specifically, the first positioning surface 14 is a plane, and the installation and positioning of the extinction plate 30 are completed by aligning and tangentially contacting the first positioning surface 14 with the plane on the cold screen, and then the next heating and curing can be performed.

[0047] Further, scales are arranged on the first positioning surface 14, and then scales are arranged on the plane on the cold screen, and when the cold screen is positioned with the matching base 11, the coaxiality of the second positioning core 13 and the axis of the cold screen can be found through the scales on the first positioning surface 14, thereby improving the installation accuracy of the cold screen and the matching base 11.

[0048] Preferably, as shown in Figure 1 , Figure 5 , a third positioning core 15 is further arranged on the first positioning core 12, the third positioning core 15 has the same shape as the second diaphragm hole 31 on the extinction plate 30, the second positioning core 13 and the third positioning core 15 are concentrically arranged, the extinction plate 30 can be placed on the first positioning core 12 through the third positioning core 15, and the second diaphragm hole 31 on the extinction plate 30 is matched and limited by the third positioning core 15, and at the same time, the first diaphragm hole 21 on the cold screen is matched with the second diaphragm hole 31 on the extinction plate 30 through the second positioning core 13, thereby improving the pasting accuracy and the consistency of the installation of the extinction plate 30.

[0049] Further, as shown in Figure 2 , Figure 4 , Figure 5 , the positioning and pasting device further comprises a positioning base 16, the positioning hole 17 is arranged on the positioning base 16, the positioning base 16 is operatively installed on the upper end of the cold screen, the positioning hole 17 is overlapped with the first diaphragm hole 21 on the cold screen, the second positioning core 13 is operatively inserted into the positioning hole 17, the first diaphragm hole 21 on the cold screen is concentric with the second positioning core 13, and then the first diaphragm hole 21 on the cold screen is concentric with the second diaphragm hole 31 on the extinction plate 30, thereby improving the installation accuracy.

[0050] Specifically, as shown in Figure 5As shown, the positioning base 16 has a certain thickness, so that after the positioning and bonding device is installed and matched with the cold screen, the second positioning core 13 is inserted into the positioning hole 17 by one quarter to three quarters of the length, so that the positioning effect of the positioning base 16 on the second positioning core 13 is enhanced, the coaxiality of the second positioning core 13 and the first diaphragm hole 21 on the cold screen is improved, and the relative position change between the second positioning core 13 and the positioning base 16 is prevented during the heating and fixing of the light extinction plate 30.

[0051] Preferably, as shown in the accompanying drawings, Figure 5 、 Figure 6 The adjusting rod 18 is fixedly arranged on the back of the matching base 11, and during the installation of the positioning and bonding device, the coaxiality of the second positioning core 13 and the first diaphragm hole 21 on the cold screen and the angle between the first diaphragm hole 21 on the cold screen and the second diaphragm hole 31 on the light extinction plate 30 are adjusted by operating the adjusting rod 18, so that the installation position of the light extinction plate 30 is more accurate.

[0052] As shown in the accompanying drawings, Figures 1-9 The utility model also provides a cold screen, including cold screen main part 20, cold screen main part 20 with the positioning and bonding device of any one in above-mentioned technical scheme cooperation and installation, the first diaphragm hole 21 is set up in the upper end of cold screen main part 20, and cold screen main part 20 is multilayer structure, and the structure of cold screen main part 20 is prior art, and here will not be repeated, and the first diaphragm hole 21 is coaxially arranged with the cold screen main part 20, and the second positioning core 13 is operable through the first diaphragm hole 21.

[0053] Further, as shown in the accompanying drawings, Figure 6 、 Figure 8 The lower end of the cold screen main part 20 is provided with a second positioning surface 22, which is matched with the first positioning surface 14 when the cold screen main part 20 is installed with the matching base 11. Specifically, the second positioning surface 22 is coplanar with the first positioning surface 14. When the first positioning surface 14 and the second positioning surface 22 are arranged as two or three groups, it is better to have two first positioning surfaces 14 perpendicular to each other. When the first positioning surface 14 and the second positioning surface 22 are adjusted, the second positioning core 13 is positioned in two directions at the same time, making it easier to adjust the coaxiality of the second positioning core 13 and the cold screen, and avoiding the assembly error between the second positioning core 13 and the cold screen.

[0054] During the installation of the cold screen and the light extinction plate 30, the cold screen has a multilayer structure, and multiple positioning and bonding devices of different models can be arranged;

[0055] a. First, place the cold screen main part 20 on the positioning base 16 so that the first diaphragm hole 21 coincides with the positioning hole 17;

[0056] b. Then the cold shield body 20 is inverted, and the adhesive is applied on the adhesive step of the inner surface of the cold shield body 20;

[0057] c. The corresponding size of the light extinction plate 30 is placed on the first positioning core 12, so that the second light barrier hole 31 matches the third positioning core 15;

[0058] d. In the state that the cold shield body 20 is inverted, the corresponding type of positioning and adhesive device is respectively installed and matched with the cold shield body 20 according to the order from bottom to top, so that the second positioning core 13 is positioned and matched with the positioning hole 17, when the matching base 11 is matched with the cold shield body 20, the light extinction plate 30 contacts the adhesive step of the inner surface of the cold shield body 20, and the second positioning core 13 is inserted into the positioning hole 17 by one quarter to three quarters of the length range position, the horizontal position of the light extinction plate 30 and the concentricity with the adhesive step of the inner surface of the cold shield body 20 are adjusted by adjusting the relative position of the first positioning surface 14 and the second positioning surface 22, so that the installation position of the light extinction plate 30 is more accurate, that is, the adhesive of one layer of light extinction plate 30 is completed, and heating and curing are performed;

[0059] e. Repeat step d to complete the adhesive of each layer of light extinction plate 30 one by one.

[0060] Although the present application has been described with reference to the preferred embodiments, various modifications and alterations can be made to the present application without departing from the scope of the present application. In particular, the technical features mentioned in each of the embodiments can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cold shield and light dump positioning and bonding apparatus, comprising: a cold shield; a light dump; a first bonding apparatus; a second bonding apparatus; and a third bonding apparatus. The utility model relates to a positioning and bonding device for cold shield and light extinction plate, comprising: a matching base for matching installation with the lower end of the cold shield; a first positioning core fixedly arranged on the front face of the matching base for installing the light extinction plate; a second positioning core fixedly arranged on the front face of the matching base, the second positioning core being operable to pass through the diaphragm hole on the cold shield for coaxially arranging the matching base with the cold shield.

2. The cold shield and light trap positioning and bonding apparatus of claim 1, wherein, At least one first positioning face is arranged on the side face of the matching base for matching positioning with the cold shield.

3. The cold shield and light trap positioning and bonding apparatus of claim 2, wherein, The first positioning face is a plane.

4. The cold shield and light trap positioning and bonding apparatus of claim 3, wherein, A scale is arranged on the first positioning face.

5. The cold shield and light trap positioning and bonding apparatus of any of claims 1-4, wherein, A third positioning core is further included, the third positioning core being fixedly arranged on the first positioning core, the third positioning core being used for matching installation with the diaphragm hole on the light extinction plate.

6. The cold shield and light trap positioning and bonding apparatus of any of claims 1-4, wherein, A positioning base is further included, the positioning base being provided with a positioning hole, the positioning base being used for matching installation with the upper end of the cold shield, the second positioning core being operable to be inserted into the positioning hole.

7. The cold shield and light trap positioning and bonding apparatus of claim 6, wherein, The second positioning core is inserted into the positioning hole within a length range of one fourth to three fourths.

8. The cold shield and light trap positioning and bonding apparatus of any of claims 1-4, wherein, An adjusting rod is fixedly arranged on the back face of the matching base.

9. A cold shield, characterized by The utility model relates to a cold shield main body, the cold shield main body is matched with the positioning and bonding device of any one of claims 1-8, the diaphragm hole is arranged on the upper end of the cold shield main body, the diaphragm hole is coaxially arranged with the cold shield main body, and the second positioning core is operable to pass through the diaphragm hole.

10. The cold shield of claim 9, wherein, The lower end of the cold shield main body is provided with a second positioning face, the second positioning face being matched with the first positioning face when the cold shield main body is matched with the matching base.

Images