Lens cover and infrared night vision device

Abstract

The utility model discloses a lens cover, and relates to the technical field of lens accessories, an objective lens cover can cover the end part of a lens in a buckling manner, the second end of a connecting band is connected to the objective lens cover, the connecting band passes through a buckle arranged on the lens cover, and a first expansion part and a second expansion part are sequentially expanded on the side wall of the connecting band along the length extension direction of the connecting band; the first expansion part and the second expansion part can generate elastic deformation, so that the first expansion part and the second expansion part generate elastic deformation to penetrate through the buckle when the stress exceeds a corresponding critical value; when the first expansion part is matched with the buckle to form blocking, the objective lens housing can cover the end portion of the lens in a buckled mode, and the anti-lost function is achieved through blocking of the first expansion part. When the second expansion part is matched with the buckle to form blocking, the objective lens housing is limited to the position close to the buckle, at the moment, the objective lens housing is attached to the side wall of the lens shell through blocking of the second expansion part, shaking of the objective lens housing is reduced, and normal use is not interfered.

Description

TECHNICAL FIELD

[0001] The utility model relates to lens accessory technical field, further relates to a lens cover and infrared night vision device. BACKGROUND

[0002] The infrared night vision device is a kind of equipment using infrared technology and photoelectric conversion technology to observe target in dark environment, can convert the infrared radiation that human eye cannot perceive into the image that can be seen by human eye, can provide high-quality image and video in dark environment, is an important technical equipment, and is widely applied.

[0003] The lens of infrared thermal imager is usually made of germanium glass, and the extraction of high-concentration germanium is very difficult, resulting in high production cost of germanium lens, and the market price is often higher than that of ordinary camera lens. Therefore, the infrared night vision device needs to be matched with a lens cover to protect the lens when not in use.

[0004] The lens cover of the existing infrared night vision device is independent of the whole machine or connected with the whole machine by a hanging rope. The completely independent lens cover is easy to lose. The lens cover hung on the whole machine is suspended below when in use, which interferes with the use.

[0005] For those skilled in the art, how to prevent the lens cover from being lost and not affect normal use is a technical problem to be solved at present. CONTENT OF THE UTILITY MODEL

[0006] The core of the utility model is to provide a lens cover, which can prevent loss and does not affect normal use when opened, and the specific scheme is as follows:

[0007] A lens cover, comprising:

[0008] An objective lens cover shell for buckling on the end of the lens;

[0009] A connecting belt, the second end of which is connected to the objective lens cover shell, and the connecting belt can pass through the buckle provided on the lens shell; a first expansion part and a second expansion part are arranged in sequence on the sidewall of the connecting belt along the length direction of the connecting belt; the first expansion part and the second expansion part are respectively used to form blocking limit with the buckle; the first expansion part and the second expansion part can be elastically deformed, so as to be elastically deformed to pass through the buckle when the stress exceeds the corresponding critical value;

[0010] Among them, the second expansion part is close to the objective lens cover shell, when the first expansion part cooperates with the buckle to form blocking, the objective lens cover shell can be buckled on the end of the lens; when the second expansion part cooperates with the buckle to form blocking, the objective lens cover shell is limited to the position close to the buckle.

[0011] Optionally, the second expansion portion is provided with a deformation gap for reducing the force required for the second expansion portion to elastically deform through the buckle.

[0012] Optionally, the edge of the objective lens cover is provided with a gap, and the connection position of the connection band and the objective lens cover is opposite to the gap.

[0013] Optionally, the objective lens cover is provided with a handle, and the connection position of the connection band and the objective lens cover is opposite to the handle.

[0014] Optionally, the connection band is a flat strip structure, and the first expansion portion and the second expansion portion are respectively formed as convex bulging portions in the width direction.

[0015] Alternatively, the connection band is a columnar structure, and the first expansion portion and the second expansion portion are respectively formed as convex bulging portions in the circumferential direction.

[0016] Optionally, the objective lens cover and the connection band are integrally processed and formed.

[0017] Optionally, the length extension direction of the connection band is perpendicular to the radial direction of the objective lens cover.

[0018] Optionally, there is a gap between the first end of the connection band and the first expansion portion, and the outer surface of the connection band is provided with a concave-convex undulating corrugated area.

[0019] The utility model also provides a kind of infrared night vision device, including the lens cover of any one of the above, including lens, the buckle of the shell of the lens is provided, and the buckle is used to supply the connection band to pass through.

[0020] Optionally, the buckle is located directly below the lens.

[0021] The utility model provides a kind of lens cover, objective lens cover can be buckled and cover in lens end part, the second end of connection band is connected to objective lens cover, connection band passes through the buckle of the lens shell being provided, and the sidewall of connection band is sequentially expanded and set first expansion portion and second expansion portion along the length extension direction of connection band;First expansion portion and second expansion portion can elastically deform, to elastically deform through buckle when stress exceeds corresponding critical value;When first expansion portion and buckle cooperate to form barrier, objective lens cover can be buckled and cover in lens end part, prevent losing function by the barrier of first expansion portion;When second expansion portion and buckle cooperate to form barrier, objective lens cover is limited to the position close to buckle, when second expansion portion barrier makes objective lens cover stick to the sidewall of lens shell, reduce overhanging length when opening objective lens cover, reduce the swing of objective lens cover, do not interfere with normal use. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 The first perspective view of the lens cover in the closed state of the present application;

[0024] Figure 2 The second perspective view of the lens cover in the closed state of the present application;

[0025] Figure 3 The first perspective view of the lens cover in the open state of the present application;

[0026] Figure 4 The second perspective view of the lens cover in the open state of the present application;

[0027] Figure 5 The perspective view of the connecting belt in another embodiment;

[0028] Figure 6 The perspective view of the infrared night vision device in the closed state of the lens cover of the present application;

[0029] Figure 7 The perspective view of the infrared night vision device in the open state of the lens cover of the present application.

[0030] The drawings include:

[0031] Objective lens cover shell 1, avoiding gap 11, handle 12, connecting belt 2, first expansion part 21, second expansion part 22, deformation gap 221, corrugated area 23, convex rib 24, lens 3, buckle 4. DETAILED DESCRIPTION

[0032] The core of the present application is to provide a lens cover which can prevent loss and does not affect normal use when opened.

[0033] In order to make those skilled in the art better understand the technical scheme of the present application, the lens cover of the present application will be described in detail in combination with the drawings and specific embodiments.

[0034] The present application provides a lens cover, which comprises an objective lens cover shell 1 and a connecting belt 2, and the objective lens cover shell 1 and the connecting belt 2 are connected with each other to form the entire lens cover structure.

[0035] The connecting band 2 is made of flexible material and can be flexibly deformed, for example, made of silica gel, rubber or other materials with certain elasticity. The second end of the connecting band 2 is connected to the objective lens cover 1, and the first end of the connecting band 2 is a free end. As shown in Figure 6 , Figure 7 The lens 3 is provided with a buckle 4, which is a ring-shaped channel structure. The connecting band 2 can pass through the buckle 4 provided on the lens 3, and the connecting band 2 can slide relative to the buckle 4.

[0036] The side wall of the connecting band 2 is provided with a first expansion part 21 and a second expansion part 22 in sequence along the length direction of the connecting band 2. The first expansion part 21 and the second expansion part 22 are both size expansion structures of the outer surface of the connecting band 2. The first expansion part 21 and the second expansion part 22 can have different shapes and sizes.

[0037] The cross-sectional size of the position where the first expansion part 21 and the second expansion part 22 are located should be larger than the channel size of the buckle 4. The first expansion part 21 and the second expansion part 22 are respectively used to cooperate with the buckle 4 to form a blocking limit. However, the first expansion part 21 and the second expansion part 22 are both made of elastic material, and the first expansion part 21 and the second expansion part 22 can be elastically deformed or the first expansion part 21 and the second expansion part 22 can be elastically deformed synchronously with the connecting band 2. The first expansion part 21 and the second expansion part 22 can pass through the buckle 4 by elastic deformation. When the connecting band 2 is subjected to tension at the first end or the second end, the connecting band 2 and the length increase, and the first expansion part 21 and the second expansion part 22 are extruded by the buckle 4, so that the cross-sectional area is reduced, and the first expansion part 21 or the second expansion part 22 can pass through the buckle 4.

[0038] The main part of the connecting band 2 (the area where the first expansion part 21 and the second expansion part 22 are not provided) can freely slide in the channel of the buckle 4, only a small force is needed to displace the connecting band 2, and at this time the connecting band 2 does not need to be deformed. The first expansion part 21 and the second expansion part 22 can be elastically deformed, so that when the force exceeds the corresponding critical value, the first expansion part 21 and the second expansion part 22 can be elastically deformed to pass through the buckle 4. When the first expansion part 21 or the second expansion part 22 passes through the buckle 4, a larger force needs to be applied, and the first expansion part 21 or the second expansion part 22 can pass through only after the deformation reaches a certain degree. According to the different shapes and sizes of the first expansion part 21 and the second expansion part 22, the critical values required for the first expansion part 21 and the second expansion part 22 to pass through the buckle 4 can be different.

[0039] The second expansion part 22 is close to the objective lens cover 1, that is, the second expansion part 22 is close to the second end of the connecting band 2, and the first expansion part 21 is close to the first end of the connecting band 2. As shown in Figure 6As shown, when the first expansion part 21 cooperates with the buckle 4 to form a block, the objective lens cover 1 can be buckled on the end of the lens 3, at this time the state of the whole lens cover is as shown in Figure 1 、 Figure 2 ; at this time the first expansion part 21 and the objective lens cover 1 are respectively located on both sides of the buckle 4, the first expansion part 21 can form a block, even if the objective lens cover 1 falls off, it will not be separated from the shell of the lens 3, thereby playing a function of preventing loss.

[0040] When the second expansion part 22 cooperates with the buckle 4 to form a block, the objective lens cover 1 is limited to a position close to the buckle 4, at this time the state of the whole lens cover is as shown in Figure 3 、 Figure 4 . The process from Figure 6 to Figure 7 is the process that the second expansion part 22 passes through the buckle 4, in the state of Figure 7 , the second expansion part 22 and the objective lens cover 1 are respectively located on both sides of the buckle 4, the distance between the second expansion part 22 and the objective lens cover 1 is smaller than the distance between the first expansion part 21 and the objective lens cover 1, at this time the objective lens cover 1 can be pulled back and the objective lens cover 1 is attached to the side wall of the shell of the lens 3, at this time the position of the objective lens cover 1 is limited and basically does not hang down, keeps the position of being attached to the side wall of the shell of the lens 3, when the lens 3 is moved relatively fast, the objective lens cover 1 will not be swung greatly, reducing the interference caused by the objective lens cover 1 in the open state to normal use.

[0041] The second expansion part 22 is provided with a deformation gap 221, which is used to reduce the force required for the elastic deformation of the second expansion part 22 to pass through the buckle 4. It should be noted that the deformation gap 221 is a blank area without entity, so that the volume of the entity part is reduced, thereby making the second expansion part 22 more easily deformed. As shown in Figure 1 、 Figure 3 , the deformation gap 221 is a closed channel structure, that is, the deformation gap 221 does not require an opening to be provided at the edge position of the second expansion part 22. Since the second expansion part 22 needs to pass through the buckle 4 more frequently, by providing the deformation gap 221, the force required for the elastic deformation of the second expansion part 22 to pass through the buckle 4 can be reduced, which is more convenient for operation and use. The first expansion part 21 only passes through the buckle 4 during assembly and does not need to pass through the buckle 4 during normal use, so the first expansion part 21 adopts a full entity structure and is not easily deformed, thereby ensuring that the whole lens cover is not easily separated and lost.

[0042] As shown in Figure 2 、 Figure 4As shown, the edge of the objective lens cover 1 is provided with an avoiding gap 11, the width of the avoiding gap 11 should be greater than the radius of the lens, no side wall is provided at the avoiding gap 11, and the connecting position of the connecting band 2 and the objective lens cover 1 is arranged opposite to the avoiding gap 11, when it is needed to open the objective lens cover 1, the first end of the connecting band 2 is directly pulled, and only one step operation is needed. The avoiding gap 11 is not needed, and when used, the objective lens cover 1 is first pushed away along the axial direction, and then the first end of the connecting band 2 is pulled.

[0043] Combination 1, Figure 3 As shown, the objective lens cover 1 is provided with a handle 12, the handle 12 is a radially outward convex structure, the connecting position of the connecting band 2 and the objective lens cover 1 is arranged opposite to the handle 12, and the finger is convenient for pulling down the objective lens cover 1. A circular ring can be arranged on the handle 12, which can facilitate force receiving during pulling.

[0044] The utility model provides two specific setting forms of connecting band 2 here: first, combination Figures 1 to 4 As shown, the connecting band 2 is a flat strip structure, the width of the connecting band 2 along the length direction is basically equal, the first expansion part 21 and the second expansion part 22 respectively form convex bulging parts in the width direction, the first expansion part 21 and the second expansion part 22 are respectively formed on the left and right sides of the connecting band 2 and outwardly convex, and the thickness of the first expansion part 21 and the second expansion part 22 is basically equal to the thickness of the main part of the connecting band 2. The strip structure is adopted, and the connecting band 2 is not easy to rotate during movement. In this structure, the channel opened on the buckle 4 should be a flat channel.

[0045] Second, combination Figure 5 As shown, the connecting band 2 is a columnar structure, which can be a cylinder or a prism, the first expansion part 21 and the second expansion part 22 respectively form convex bulging parts in the circumferential direction. A plurality of deformation gaps 221 are arranged in the radial direction of the second expansion part 22 to make the second expansion part 22 more easily deformed. The inside of the second expansion part 22 can adopt a hollow structure, and the first expansion part 21 can adopt a solid structure. In this structure, the channel provided by the buckle 4 should be adapted to the shape of the connecting band 2. A plurality of ribs 24 can be arranged on the outer surface of the connecting band 2, and a plurality of grooves are arranged on the buckle 4, so as to prevent the connecting band 2 from rotating.

[0046] In some embodiments, the objective lens cover 1 and the connecting band 2 are integrally processed and formed, the objective lens cover 1 and the connecting band 2 are made of elastic materials, such as silica gel or rubber, and the objective lens cover 1 will not damage the lens. In addition, the objective lens cover 1 and the connecting band 2 can also be assembled in a split manner, a hinge shaft is arranged between the objective lens cover 1 and the connecting band 2, and a torsional spring is arranged on the hinge shaft, and the objective lens cover 1 can also be attached to the side wall of the shell of the lens 3 when opened and used.

[0047] In combination Figure 1 、 Figure 2 As shown in Figs. 1 and 2, for the structure that the objective lens cover 1 and the connecting band 2 are integrally processed and formed, in the natural state without external force, the length extension direction of the connecting band 2 is perpendicular to the radial direction of the objective lens cover 1, that is, most of the connecting band 2 (the second expansion part 22 to the first end) is arranged along the optical axis direction, and the objective lens cover 1 can better fit on the outer side wall of the lens 3 when the second expansion part 22 passes the buckle 4.

[0048] In combination Figure 1 、 Figure 5 As shown in Figs. 1 and 2, there is a gap between the first end of the connecting band 2 and the first expansion part 21, and this area is used for the finger to pull. The outer surface of the connecting band 2 is provided with a concave-convex undulating corrugated area 23, the corrugated area 23 forms a concave-convex undulating line, which can increase the friction and not easy to slip when pulling.

[0049] The utility model further provides an infrared night vision device, including above-mentioned lens cover, including lens 3, the buckle 4 that is arranged on the shell of lens 3, the buckle 4 is used for the connecting band 2 to pass through, and the infrared night vision device can realize the technical effect described above.

[0050] Further, in combination Figure 6 、 Figure 7 As shown in Figs. 1 and 2, the buckle 4 is located directly below the lens 3, when the objective lens cover 1 is opened and the second expansion part 22 passes the buckle 4, the objective lens cover 1 is attached to the side wall lower surface of the lens 3, and does not affect the normal use of other functions.

[0051] The above description of disclosed embodiments enables those skilled in the art to carry out or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lens hood characterized by, The utility model relates to a lens cover, which comprises: an objective lens cover (1) for being buckled on the end of a lens (3); a connecting band (2) having a second end connected to the objective lens cover (1), the connecting band (2) being capable of passing through a buckle (4) provided on the shell of the lens (3); a first bulging part (21) and a second bulging part (22) are arranged in sequence along the length extension direction of the connecting band (2) on the sidewall of the connecting band (2); the first bulging part (21) and the second bulging part (22) are respectively used for cooperating with the buckle (4) to form a blocking limit; the first bulging part (21) and the second bulging part (22) can be elastically deformed, so as to be elastically deformed to pass through the buckle (4) when the force exceeds the corresponding critical value; wherein the second bulging part (22) is close to the objective lens cover (1), when the first bulging part (21) cooperates with the buckle (4) to form a blocking, the objective lens cover (1) can be buckled on the end of the lens (3); when the second bulging part (22) cooperates with the buckle (4) to form a blocking, the objective lens cover (1) is limited to the position close to the buckle (4).

2. The lens cover according to claim 1, characterized by The second bulging part (22) is provided with a deformation gap (221) for reducing the force required for the elastic deformation of the second bulging part (22) to pass through the buckle (4).

3. The lens cover according to claim 1, wherein The edge of the objective lens cover (1) is provided with an avoiding gap (11), and the connection position of the connecting band (2) and the objective lens cover (1) is arranged opposite to the avoiding gap (11).

4. The lens cover according to claim 1, wherein The objective lens cover (1) is provided with a handle (12), and the connection position of the connecting band (2) and the objective lens cover (1) is arranged opposite to the handle (12).

5. The lens cover according to claim 1, wherein The connecting band (2) is a flat band structure, and the first bulging part (21) and the second bulging part (22) respectively form convex bulging parts in the width direction; alternatively, the connecting band (2) is a columnar structure, and the first bulging part (21) and the second bulging part (22) respectively form convex bulging parts in the circumferential direction.

6. The lens cover according to claim 1, wherein The objective lens cover (1) and the connecting band (2) are integrally processed and formed.

7. The lens cover according to claim 6, characterized in that, The length extension direction of the connecting band (2) is perpendicular to the radial direction of the objective lens cover (1).

8. The lens cover according to claim 1, wherein There is a gap between the first end of the connecting band (2) and the first bulging part (21), and the outer surface of the connecting band (2) is provided with a corrugated area (23) with concave and convex fluctuations.

9. An infrared night vision device, characterized by The utility model relates to a lens cover, which comprises:

10. The infrared night vision device of claim 9, wherein, a lens (3); a buckle (4) provided on the shell of the lens (3) for the connecting band (2) to pass through. The buckle (4) is located directly below the lens (3).

Images