Strong-impact-resistant damping structure of uncooled thermal infrared imager and thermal infrared imager

Abstract

The utility model relates to an uncooled infrared thermal imager strong impact resistant damping structure and an infrared thermal imager, the damping structure comprises an infrared detector assembly and a lens body of an objective lens barrel, the infrared detector assembly is connected with the lens body through an axially arranged lens body guide nail, an imaging damping spring and a transition plate; a connecting hole of the transition plate and the lens body is a clearance hole, and the distance from the target surface of the detector to the infrared objective lens group is controlled by compressing the length of the imaging damping spring; the detector assembly is installed on the transition plate through screws, and shock absorption of a detector is achieved when the detector assembly is subjected to impact force. The telescope body is mounted on the base through a base guide nail and a telescope body damping spring which are axially arranged; when the lens body and the base are subjected to impact force, the lens body and the base move relative to each other, the guide rail sliding block is connected between the base and the lens body, it is guaranteed that the base and the lens body are not in direct contact, and friction force is reduced in the relative movement process. According to the structure, two-stage damping is carried out on the infrared detector assembly and the whole machine, and the impact load of the infrared detector assembly is smaller.

Description

Technical Field

[0001] The utility model relates to a thermal imager with a sighting mirror, in particular to a non-cooling infrared thermal imager with a strong impact-resistant shock-absorbing structure and the infrared thermal imager. Background Art

[0002] The range of low-light-level night vision devices is severely limited in moonless and starless nights, and they are easily affected by bad weather and cannot detect camouflaged targets. Visible light at night is very weak, but infrared rays that are invisible to the human eye are very abundant. Infrared thermal imagers can detect and identify targets in smoke or thick fog and fog. Thermal imagers are complex high-tech devices. As night vision devices in the military, they have the following advantages: (1) Passive: Thermal imagers do not need to be equipped with radiation sources. They use their own infrared radiation to form images. They are not easily detected by the enemy in war and are not easily interfered with; (2) All-weather: Thermal imagers can perform tasks 24 hours a day, can also observe in foggy weather, and can perform observations in the dark of night; (3) Real-time: They can obtain visible images in real time.

[0003] As the power of various launchers increases, their recoil becomes excessive, leading to a decrease in the accuracy of various sights. The fundamental reason for this decrease in accuracy is that the sights are not functioning properly. Under the impact of high-intensity recoil, improving the survivability of various sights becomes particularly important. Utility Model Content

[0004] The main problem to be solved by the utility model is to improve the survivability of the aiming system as needed, and to design an infrared thermal imager with a shock-absorbing structure to reduce the impact of recoil on the infrared thermal imager during use.

[0005] The technical solutions adopted to achieve the purpose of this utility model are:

[0006] A shock-absorbing structure for an uncooled infrared thermal imager designed to withstand strong impacts includes an infrared detector assembly connected to the objective lens barrel via four guide pins, four imaging shock-absorbing springs (one spring inserted into each guide pin), and a transition plate. The connection hole between the transition plate and the objective lens barrel is a clearance hole. The distance between the detector target surface and the infrared objective lens assembly is controlled by compressing the length of the imaging shock-absorbing springs. The detector is mounted to the transition plate with screws. During adjustment, the detector can be fine-tuned to adjust the crosshair offset and field of view center offset. This provides shock absorption during impacts. The thermal imager structure utilizes an objective lens barrel mounted on a base via two base guide pins and four body shock-absorbing springs (two springs connected end-to-end for each guide pin). During impacts, the objective lens barrel and base move relative to each other. A guide rail and slider connect the base and objective lens barrel to ensure that the base and objective lens barrel do not come into direct contact, significantly reducing friction during this relative movement.

[0007] Furthermore, the shock-absorbing structure of the present invention includes a mirror body and a base, and the mirror body and the base are connected in series in the axial direction through two base guide pins, and a base elastic damping plate, a mirror body shock-absorbing spring, and a base gasket that reduces the direct hard contact between the mirror body shock-absorbing spring and the base and the mirror body are installed between the base and the mirror body; the mirror body is radially fastened to the base through a guide rail slider; a detector assembly is installed at the rear end of the mirror body, the detector assembly is installed on the transition plate by screws, and then installed to the rear end of the mirror body 1 through 4 mirror body guide pins, and an imaging shock-absorbing spring and a mirror body gasket that reduces the direct hard contact between the imaging shock-absorbing spring and the bracket are installed between the detector assembly and the mirror body 1.

[0008] The utility model also provides an infrared thermal imager comprising the non-cooling infrared thermal imager strong impact resistant shock absorbing structure of the utility model.

[0009] The beneficial technical effects of the utility model are:

[0010] 1) The entire device is basically assembled by cylindrical surface matching, and the processing accuracy is easy to ensure;

[0011] 2) Each group and component is connected in series through guide pins, so there will be no relative circumferential flipping between them and the positioning accuracy is guaranteed;

[0012] 3) The entire structure provides vibration reduction not only for the infrared detector assembly but also for the entire machine. After two levels of vibration reduction, the impact load on the infrared detector assembly is reduced. The structural design of each component of the entire system is closely linked to each other, achieving excellent vibration reduction performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a side view of the vibration reduction structure of the present utility model.

[0014] Figure 2 This is an exploded view of the base and the mirror body.

[0015] Figure 3 This is an exploded view of the detector assembly and the mirror body.

[0016] In the picture:

[0017] Mirror body 1, first mirror body hole 1-1, second mirror body hole 1-2;

[0018] Base 2, first opening 2-1, second opening 2-2, annular threaded hole 2-3, first threaded hole 2-4, fastening threaded hole 2-5;

[0019] Base gasket 3, base elastic damping plate 4, mirror body shock absorbing spring 5, tightening screw 6, detector assembly 7;

[0020] Mirror body guide pin 8, second annular protrusion 8-1, second annular thread 8-2;

[0021] Transition plate 9, first circular hole 9-1, second circular hole 9-2;

[0022] Linear bearing 10, imaging shock-absorbing spring 11, mirror body elastic damping plate 12, nut 13, guide rail slider 14, base guide pin 15, support plate 16, second threaded hole 16-1, circular hole 16-2; first annular thread 15-1, first annular protrusion 15-2;

[0023] Mirror body gasket 17. DETAILED DESCRIPTION

[0024] Example

[0025] Reference Figure 1 、 2 3. A shock-absorbing structure for a non-cooled infrared thermal imager that is resistant to strong impacts, comprising a lens body 1 and a base 2. The lens body 1 and the base 2 are connected in series in the axial direction through two base guide pins 15. A base elastic damping plate 4, a lens body shock-absorbing spring 5, and a base gasket 3 for reducing direct hard contact between the lens body shock-absorbing spring 5 and the base and the lens body 1 are installed between the base 2 and the lens body 1; the lens body 1 is radially fastened to the base 2 through a guide rail slider 14; a detector assembly 7 is installed at the rear end of the lens body 1, the detector assembly 7 is mounted on the transition plate 9 by screws, and then mounted to the rear end of the lens body 1 together through four lens body guide pins, and an imaging shock-absorbing spring 11 and a lens body elastic damping plate 12 for reducing direct hard contact between the imaging shock-absorbing spring 11 and the support plate 16 are installed between the detector assembly 7 and the lens body 1.

[0026] The base 2 is provided with a first opening 2-1, a second opening 2-2, an annular threaded hole 2-3, and a fastening threaded hole 2-5. A base guide pin 15 has a first annular protrusion 15-2 on one end, whose diameter is larger than the first opening 2-1 to prevent the first annular protrusion from passing through the first opening 2-1; a first annular thread 15-1 is formed on the other end. Each base guide pin 15 sequentially passes through the base's first opening 2-1, the base elastic damping plate 4, the first lens body hole 1-1, the base gasket 3, the lens body shock-absorbing spring 5, the base gasket 3, and then exits through the base's second opening 2-2, then passes through the base elastic damping plate 4, the second lens body hole 1-2, the base gasket 3, the lens body shock-absorbing spring 5, the base gasket 3, and finally exits through the base's threaded hole 2-4. The first annular thread 15-1 is used to cooperate with the annular threaded hole 2-3 of the base 2 to axially tighten the base guide pin 15 during installation. Finally, the fastening screw 6 is installed in the fastening threaded hole 2-5 to prevent the base guide pin 15 from loosening.

[0027] The base 2 is provided with threaded holes 2-4 for installing the guide rail slider 14, and the mirror body 1 is provided with a circular through hole 1-3, through which the mirror body 1 and the guide rail slider 14 can be fastened by screws, and then the mirror body 1 and the base 2 are connected into a whole.

[0028] The mirror body 1 is provided with a countersunk hole 1-4, and the support plate 16 is provided with a threaded hole 16-1, which is fixed to the mirror body by screws. The support plate is also provided with four round holes 16-2 for the four mirror body guide pins 8 to pass through.

[0029] The detector assembly 7 is secured to the transition plate 9 via the second circular hole 9-2. The transition plate 9 also features a first circular hole 9-1. Each scope guide pin 8 sequentially passes through the first circular hole 9-1, then through the linear bearing 10, scope gasket 17, imaging shock-absorbing spring 11, and scope elastic damping plate 12, ultimately exiting through the circular hole 16-2 in the support plate 16. The scope guide pin 8 has a second annular protrusion 8-1 on one end, larger in diameter than the first circular hole 9-1, to prevent it from passing through. The other end is machined with a second annular thread 8-2, which engages with a nut 13 to tighten the detector assembly 7.

[0030] The linear bearing 10 is used to limit the radial movement of the mirror body guide pin 8 and ensure the coaxial requirements of the detector group 7 during the axial movement.

[0031] It can be seen from the above embodiments that the present invention has the following features:

[0032] (1) The infrared detector is connected to the objective lens barrel through four lens guide pins and four imaging shock-absorbing springs. The connection hole with the objective lens barrel is a clearance hole. The distance from the detector target surface to the infrared objective lens group is controlled by the length of the lens guide pins.

[0033] (2) The lens body is installed on the base, and the base guide pins and the lens body shock-absorbing springs ensure that the lens body can only move forward and backward. The objective tube and the base can move relative to each other. A guide rail slider is connected between the base and the objective tube to ensure that the base and the objective tube do not directly contact each other, greatly reducing friction during the mutual movement;

[0034] (3) Through impact tests and actual test verification by the thermal imager user unit, this thermal imager has effectively improved the impact resistance of the infrared detector in the working state. The two-stage shock absorption structural system it adopts has achieved a good shock absorption effect.

Claims

1. A shock-absorbing structure for an uncooled infrared thermal imager that is resistant to strong impact, characterized in that: The invention relates to a lens body (1) comprising an infrared detector assembly (7) and an objective lens barrel, wherein the infrared detector assembly (7) is connected to the lens body (1) via an axially arranged lens body guide pin (8), an imaging shock-absorbing spring (11) and a transition plate (9), wherein the connection hole between the transition plate (9) and the lens body (1) is a clearance hole, and the distance between the detector target surface and the infrared objective lens group is controlled by compressing the length of the imaging shock-absorbing spring (11); the detector assembly (7) is mounted on the transition plate (9) via screws, and the detector is shock-absorbed when subjected to an impact force; the lens body (1) is mounted on the base (2) via an axially arranged base guide pin (15) and a lens body shock-absorbing spring (5); when subjected to an impact force, the lens body (1) and the base (2) move relative to each other, and a guide rail slider (14) is connected between the base (2) and the lens body (1) to ensure that the base (2) and the lens body (1) do not directly contact each other, thereby reducing friction during the relative movement.

2. The shock-absorbing structure for an uncooled infrared thermal imager capable of resisting strong impact according to claim 1, characterized in that: The mirror body guide nails (8) are provided with four, the imaging shock-absorbing springs (11) are provided with four, and each mirror body guide nail (8) is penetrated by one imaging shock-absorbing spring (11).

3. The shock-absorbing structure for an uncooled infrared thermal imager capable of resisting strong impact according to claim 1, characterized in that: The base guide pins (15) are provided with two, the mirror body shock-absorbing springs (5) are provided with four, and each base guide pin (15) is inserted into two mirror body shock-absorbing springs (5) connected end to end.

4. The shock-absorbing structure for an uncooled infrared thermal imager capable of resisting strong impact according to any one of claims 1 to 3, characterized in that: A base elastic damping sheet (4) and a base gasket (3) are installed between the base (2) and the mirror body (1); a mirror body elastic damping sheet (12) is installed between the detector assembly (7) and the mirror body (1), as well as between the imaging shock-absorbing spring (11) and the supporting plate (16).

5. The shock-absorbing structure for an uncooled infrared thermal imager capable of resisting strong impact according to claim 4, characterized in that: The base (2) is provided with a first opening (2-1), a second opening (2-2), an annular threaded hole (2-3), and a fastening threaded hole (2-5); a first annular protrusion (15-2) is provided at one end of the base guide pin (15), and its diameter is larger than the first opening (2-1) to ensure that the first annular protrusion cannot pass through the first opening (2-1); a first annular thread (15-1) is processed at the other end of the base guide pin (15); the base guide pin (15) passes through the first opening (2-1) of the base, the base elastic damping plate (4), the first lens body hole (1-1), the base gasket (3), the lens body shock absorbing spring (5), and the base gasket (3) in sequence, and then passes through the second opening (2-2) of the base, and then passes through the base elastic damping plate (4), the second lens body hole (1-2), the base gasket (3), the lens body shock absorbing spring (5), and the base gasket (3), and finally passes through the first threaded hole (2-4) of the base.

6. The shock-absorbing structure for an uncooled infrared thermal imager capable of resisting strong impact according to claim 5, characterized in that: The first annular thread (15-1) is used to cooperate with the annular threaded hole (2-3) of the base (2) to axially tighten the base guide pin (15) during installation, and finally a fastening screw (6) is installed in the fastening threaded hole (2-5) to prevent the base guide pin (15) from loosening.

7. The shock-absorbing structure for an uncooled infrared thermal imager capable of resisting strong impact according to claim 5, characterized in that: The base (2) is provided with a first threaded hole (2-4) for mounting the guide rail slider (14), and the mirror body (1) is provided with a circular through hole (1-3). The mirror body (1) and the guide rail slider (14) are fastened together by screws through the circular through hole (1-3), thereby connecting the mirror body (1) and the base (2) into a whole.

8. The shock-absorbing structure for an uncooled infrared thermal imager capable of resisting strong impact according to claim 4, characterized in that: The mirror body (1) is provided with a countersunk hole (1-4), and the support plate (16) is provided with a second threaded hole (16-1). The support plate (16) is fixed to the mirror body (1) by screws. The support plate (16) is also provided with four round holes (16-2) for the mirror body guide nails (8) to pass through.

9. The shock-absorbing structure for an uncooled infrared thermal imager capable of resisting strong impact according to claim 4, characterized in that: A second circular hole (9-2) is provided on the transition plate (9) for fixing the detector assembly (7) on the transition plate (9), and a first circular hole (9-1) is also provided on the transition plate (9); the mirror body guide pin (8) passes through the first circular hole (9-1) in sequence, and passes through the linear bearing (10), the mirror body gasket (17), the imaging shock-absorbing spring (11) and the mirror body elastic damping plate (12), and finally passes through the circular hole (16-2) on the support plate; the mirror body guide pin (8) is provided with a second annular protrusion (8-1) at one end and its diameter is larger than the first circular hole (9-1) of the transition plate to ensure that the second annular protrusion cannot pass through the first circular hole (9-1), and a second annular thread (8-2) is processed on the other end for cooperating with the nut (13) for tightening the detector assembly; The linear bearing (10) is used to limit the radial movement of the mirror body guide pin (8) and to ensure the coaxial requirement of the detector assembly (7) during the axial movement.

10. An infrared thermal imager, characterized in that: The invention comprises a shock-absorbing structure for an uncooled infrared thermal imager capable of resisting strong impact as described in any one of claims 1 to 9.

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