Lens with rear-mounted protective glass and camera

Abstract

The invention discloses a lens with rear-mounted protective glass and a camera, and relates to the technical field of camera shooting, and the lens with the rear-mounted protective glass comprises a protective glass seat, the protective glass, a lens barrel and an imaging assembly. Wherein the protective glass base is annularly arranged, and the inner side face of the protective glass base is arranged in a step mode so as to form a first section and a second section, and the inner diameters of the first section and the second section are sequentially increased from front to back; the protective glass is arranged in an inner hole of the protective glass seat and corresponds to the first section; the lens cone is located on the front side of the protective glass and is detachably connected to the second section in the front-back direction; the imaging assembly is arranged in the lens cone; through the arrangement, the whole lens does not need to be dismounted, and the time and cost for factory repair are saved through dismounting the protective glass seat.

Description

Technical Field

[0001] The invention relates to the field of camera technology, and in particular to a lens and a camera with a protective glass rear. Background Art

[0002] At present, camera technology has been widely used, from mobile phone cameras to security monitoring, which are inseparable from lenses. The quality of the lens directly affects the quality of the image. Most domestic lenses use a protective glass installed behind the last lens, which not only protects against scratches and prevents the last lens from getting dirty, but also filters out stray light that is not conducive to imaging by coating the protective glass, and also reduces reflection and increases transmittance.

[0003] When assembling the protective glass, the lens barrel is usually placed vertically before leaving the factory, and the protective glass is directly supported inside the lens barrel where the spherical lens is supported, and fixed by glue or locking with a pressure ring. In this case, if the protective glass is dirty or scratched during use, the entire lens must be removed and returned to the factory for replacement of the protective glass. Summary of the invention

[0004] The main purpose of the present invention is to provide a lens with a protective glass at the rear, so as to save the time and cost of returning to the factory for repair by disassembling the protective glass seat without disassembling the entire lens.

[0005] To achieve the above object, the lens with protective glass behind it proposed by the present invention comprises:

[0006] The protective glass seat is arranged in an annular shape, and the inner side surface of the protective glass seat is arranged in a stepped manner to form a first section and a second section whose inner diameters increase successively in the front-to-back direction;

[0007] A protective glass is disposed in the inner hole of the protective glass seat and is disposed corresponding to the first section;

[0008] a lens barrel, located in front of the protective glass and detachably connected to the second section along the front-to-back direction; and

[0009] The imaging component is arranged in the lens barrel.

[0010] In one embodiment, the second section of the protective glass seat is provided with an internal thread for threaded connection of the rear end of the lens barrel.

[0011] In one embodiment, a sealing groove is concavely formed on the peripheral side surface of the rear end of the lens barrel, and an O-ring is disposed in the sealing groove to seal with the protective glass seat.

[0012] In one embodiment, the protective glass is bonded and fixed to the protective glass seat; and / or,

[0013] The lens barrel and the protective glass seat are threadedly connected and bonded together.

[0014] In one embodiment, the imaging assembly includes a first lens, a spacer, and a second lens sequentially arranged along the front-to-back direction;

[0015] The spacer is arranged in a ring shape and abuts against the first lens and the second lens respectively.

[0016] In one embodiment, the front end of the inner side surface of the lens barrel is arranged in a stepped manner to form a rearwardly arranged abutting surface, and at least a portion of the front end of the imaging component abuts against the abutting surface;

[0017] The lens behind the protective glass also includes a pressing ring, which is arranged in the lens barrel and located at the rear end of the lens barrel, and the front end surface of the pressing ring abuts against the rear end of the imaging component to press the imaging component on the lens barrel.

[0018] In one embodiment, a step surface disposed forward is formed at the connection between the first section and the second section;

[0019] The lens behind the protective glass also includes:

[0020] The sealing ring is arranged in an annular shape and is fixed to the step surface to abut against the rear end surface of the lens barrel.

[0021] In one embodiment, the lens disposed behind the protective glass further includes an aperture, and the aperture is fixedly connected to the rear end surface of the protective glass seat.

[0022] In one embodiment, the aperture is connected to the protective glass seat by bolts.

[0023] The present invention further provides a camera, comprising a lens behind a protective glass, wherein the lens behind the protective glass comprises:

[0024] The protective glass seat is arranged in an annular shape, and the inner side surface of the protective glass seat is arranged in a stepped manner to form a first section and a second section whose inner diameters increase successively in the front-to-back direction;

[0025] A protective glass is disposed in the inner hole of the protective glass seat and is disposed corresponding to the first section;

[0026] a lens barrel, located in front of the protective glass and detachably connected to the second section along the front-to-back direction; and

[0027] The imaging component is arranged in the lens barrel.

[0028] In the technical solution of the present invention, by respectively providing a detachably connected protective glass seat and a lens barrel, and arranging the protective glass and the imaging assembly in the protective glass seat and the lens barrel respectively, the protective glass and the imaging assembly are arranged separately. When the protective glass becomes dirty or scratched, the time and cost of returning to the factory for repair can be saved by removing the protective glass seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of an embodiment of a lens with a protective glass rear provided by the present invention;

[0031] Description of Figure Numbers:

[0032] 100. Lens behind protective glass; 1. Protective glass seat; 11. First section; 12. Second section; 121. Internal thread; 2. Protective glass; 3. Lens barrel; 31. Abutment surface; 32. Sealing groove; 4. Imaging assembly; 41. First lens; 42. Spacer; 43. Second lens; 5. Pressure ring; 6. Sealing ring; 7. Aperture; 8. Bolt.

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The present invention provides a lens 100 with a protective glass 2 disposed behind it.

[0038] See also Figure 1 In one embodiment of the present invention, the lens 100 with the protective glass 2 disposed behind it comprises a protective glass seat 1, a protective glass 2, a lens barrel 3 and an imaging assembly 4; wherein the protective glass seat 1 is arranged in a ring shape, and the inner side surface of the protective glass seat 1 is arranged in a step shape to form a first section 11 and a second section 12 whose inner diameters increase successively in the front-to-back direction; the protective glass 2 is arranged in the inner hole of the protective glass seat 1 and is arranged corresponding to the first section 11; the lens barrel 3 is located at the front side of the protective glass 2 and is detachably connected to the second section 12 along the front-to-back direction; and the imaging assembly 4 is arranged in the lens barrel 3.

[0039] In the technical solution of the present invention, by respectively providing a detachably connected protective glass seat 1 and a lens barrel 3, and respectively arranging the protective glass 2 and the imaging component 4 in the protective glass seat 1 and the lens barrel 3, the protective glass 2 and the imaging component 4 are separately arranged. When the protective glass 2 becomes dirty or scratched, the time and cost of returning to the factory for repair can be saved by removing the protective glass seat 1.

[0040] Furthermore, in order to improve the connection reliability between the protective glass holder 1 and the lens barrel 3, in one embodiment of the present invention, the second section 12 of the protective glass holder 1 is provided with an internal thread 121 for the rear end of the lens barrel 3 to be threadedly connected. By threading the protective glass holder 1 and the lens barrel 3, the protective glass 2 can be replaced reliably and quickly. In addition, the external thread of the protective glass holder 1 is connected to the internal thread 121 at the rear end of the lens barrel 3, which can reduce the problem of dust generated during the screwing process falling into the lens barrel 3. It should be noted that for use scenarios that require more convenient disassembly and assembly, the threaded connection can also be adaptively replaced by a snap-on connection or a magnetic connection, and the present invention does not limit this.

[0041] It is understandable that, since the protective glass seat 1 is detachably connected to the lens barrel 3, and the protective glass 2 and the imaging assembly 4 in the lens barrel 3 are very sensitive to dust, particles and other contaminants, if the sealing is not good, these contaminants will adhere to the optical surface, affecting the imaging quality, causing the image to be blurred or spotted. For this reason, in one embodiment of the present invention, a sealing groove 32 is concavely provided on the peripheral side surface of the rear end of the lens barrel 3, and an O-ring is arranged in the sealing groove 32 to seal with the protective glass seat 1. Specifically, the depth and width of the sealing groove 32 should match the O-ring to ensure that the O-ring can be properly compressed after installation, so as to be interference-fitted in the sealing groove 32 to provide a good sealing effect. In addition, when the protective glass seat 1 is threadedly connected to the lens barrel 3, it is understandable that the sealing performance of the threaded connection is usually not enough to meet the strict sealing requirements. Similarly, a sealing groove 32 can be concavely provided at the external thread of the rear end of the lens barrel 3, and an O-ring can be arranged in the sealing groove 32 to improve the sealing.

[0042] On the other hand, it should be noted that the protective glass 2 is not frequently damaged or dirty and needs to be replaced, and the protective glass 2 is generally not subjected to external forces, and the requirements for connection strength are not high. In one embodiment of the present invention, the protective glass 2 is bonded and fixed to the protective glass holder 1, which not only meets certain fixing requirements, but also facilitates disassembly when replacement is required; specifically, the bonding method can be glue dispensing.

[0043] In addition, since there are inevitably certain errors in the production of the threads, which may lead to loose connections and shaking of the lens barrel 3, thereby affecting the imaging quality, in one embodiment of the present invention, when the lens barrel 3 and the protective glass holder 1 are threadedly connected, glue may also be applied to the threaded connection to provide a certain degree of sealing and enhance the connection reliability.

[0044] In one embodiment of the present invention, the imaging component 4 includes a first lens 41, a spacer 42, and a second lens 43 sequentially arranged along the front-to-back direction; wherein the spacer 42 is arranged in an annular shape, and is respectively in contact with the first lens 41 and the second lens 43. By setting the annular spacer 42, the spacing between two adjacent lenses can be controlled without affecting the propagation of light, thereby meeting the imaging requirements. It can be understood that the present invention does not limit the height of the spacer 42 along the front-to-back direction, and it can be changed according to actual imaging needs; in addition, the present invention does not limit the specific number, optical focal length, and surface shape of the lenses in the imaging component 4. The imaging component 4 can be provided with a combination of multiple spherical lenses and aspherical lenses, and the spacer 42 is provided between every two adjacent lenses, which can be changed according to actual imaging needs.

[0045] In order to better fix the imaging component 4, in one embodiment of the present invention, the front end of the inner side surface of the lens barrel 3 is stepped to form a rearwardly arranged abutting surface 31, and at least a part of the front end of the imaging component 4 abuts against the abutting surface 31; the lens 100 with the protective glass 2 disposed behind also includes a pressing ring 5, which is disposed in the lens barrel 3 and located at the rear end of the lens barrel 3, and the front end surface of the pressing ring 5 abuts against the rear end of the imaging component 4 to press the imaging component 4 on the lens barrel 3. By providing the abutting surface and the pressing ring 5, the imaging component 4 is pressed at the front and rear ends to prevent the imaging component 4 from shaking and affecting the imaging effect.

[0046] In one embodiment of the present invention, a step surface arranged forward is formed at the connection between the first section 11 and the second section 12; the lens 100 arranged behind the protective glass 2 also includes a sealing ring 6, which is arranged in an annular shape, and the sealing ring 6 is fixed to the step surface to abut against the rear end surface of the lens barrel 3; specifically, the sealing gasket is made of silicone rubber, which is cheap and easy to purchase, and can better prevent water vapor, dust, etc. generated by the lens in the application environment from entering the lens barrel 3, thereby improving the sealing effect.

[0047] It should be noted that the aperture 7 refers to a device used in an optical system to limit the diameter of a light beam or to define an imaging area. It is usually composed of an opaque plate with a central hole, and the size of the hole can be fixed or adjustable. The main function of the aperture 7 is to control the amount of light entering the optical system, thereby affecting the imaging effect.

[0048] In one embodiment of the present invention, the lens 100 disposed behind the protective glass 2 further includes an aperture 7, and the aperture 7 is fixedly connected to the rear end surface of the protective glass holder 1. After the protective glass holder 1 and the lens barrel 3 are arranged to be detachably connected, the aperture 7 can be arranged on the rear end surface of the protective glass holder 1 according to different requirements, and the size of the field of view of the system imaging can be changed by changing the window size of the aperture 7.

[0049] Furthermore, in an embodiment of the present invention, the diaphragm 7 is connected to the protective glass seat 1 by bolts 8. Specifically, the present invention does not limit the specific number and type of the bolts 8. In this embodiment, 4*M3×6 three-combination bolts are used for connection, and the bolts 8 are arranged at equal intervals around the diaphragm 7, so as to stably fix the diaphragm 7 to the rear end surface of the protective glass seat 1.

[0050] In one embodiment of the present invention, during assembly, the following steps may be performed in sequence:

[0051] First, rotate the lens barrel 3 180° and place it vertically, and then assemble the first lens 41, the spacer 42, and the second lens 43 into the lens barrel 3 in sequence. After adjustment, lock the rear end of the lens barrel 3 with the pressing ring 5 and fix it with glue.

[0052] Then, the protective glass 2 is placed in the vertically placed protective glass seat 1 and fixed with glue, the protective glass seat 1 is rotated 180°, the diaphragm 7 is placed on the protective glass seat 1, and the diaphragm 7 is fastened with bolts.

[0053] Put the assembled protective glass seat 1 into the lens barrel 3, apply glue to the threads of the protective glass seat 1, screw it into the lens barrel 3 using a threaded connection, and press and fix the protective glass seat 1.

[0054] When the terminal is assembled, the front end of the lens barrel 3 is locked and connected to the terminal marble platform by screws. If the protective glass 2 becomes dirty or scratched during use, the protective glass seat 1 can be directly removed to wipe or replace the protective glass 2.

[0055] The present invention further proposes a camera, which includes a lens behind a protective glass. The specific structure of the lens behind the protective glass refers to the above-mentioned embodiment. Since the lens behind the protective glass adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0056] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A lens with a protective glass rear, characterized in that: The lens behind the protective glass includes: The protective glass seat is arranged in an annular shape, and the inner side surface of the protective glass seat is arranged in a stepped manner to form a first section and a second section whose inner diameters increase successively in the front-to-back direction; A protective glass is disposed in the inner hole of the protective glass seat and is disposed corresponding to the first section; a lens barrel, located in front of the protective glass and detachably connected to the second section along the front-to-back direction; and The imaging component is arranged in the lens barrel.

2. The lens with protective glass behind it as claimed in claim 1, characterized in that: The second section of the protective glass seat is provided with an internal thread for threaded connection of the rear end of the lens barrel.

3. The lens with protective glass behind it as claimed in claim 1, characterized in that: A sealing groove is concavely arranged on the peripheral side surface of the rear end of the lens barrel, and an O-ring is arranged in the sealing groove to seal with the protective glass seat.

4. The lens with protective glass behind it as claimed in claim 1, characterized in that: The protective glass is bonded and fixed to the protective glass seat; and / or, The lens barrel and the protective glass seat are threadedly connected and bonded together.

5. The lens with protective glass behind it as claimed in claim 1, characterized in that: The imaging assembly comprises a first lens, a spacer and a second lens arranged in sequence along the front-to-back direction; The spacer is arranged in a ring shape and abuts against the first lens and the second lens respectively.

6. The lens with protective glass behind it as claimed in claim 1, characterized in that: The front end of the inner side surface of the lens barrel is arranged in a stepped manner to form a rearwardly arranged abutting surface, and at least a part of the front end of the imaging component abuts against the abutting surface; The lens behind the protective glass also includes a pressing ring, which is arranged in the lens barrel and located at the rear end of the lens barrel, and the front end surface of the pressing ring abuts against the rear end of the imaging component to press the imaging component on the lens barrel.

7. The lens with protective glass behind it as claimed in claim 1, characterized in that: A step surface arranged forward is formed at the connection between the first section and the second section; The lens behind the protective glass also includes: The sealing ring is arranged in an annular shape and is fixed to the step surface to abut against the rear end surface of the lens barrel.

8. The lens with protective glass behind it as claimed in claim 1, characterized in that: The lens disposed behind the protective glass further comprises an aperture, and the aperture is fixedly connected to the rear end surface of the protective glass seat.

9. The lens with protective glass behind it as claimed in claim 8, characterized in that: The aperture is connected to the protective glass seat via bolts.

10. A camera comprising a lens disposed behind the protective glass as claimed in any one of claims 1 to 9.

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