CN217484582U - Precision electric lens focusing device - Google Patents

Abstract

The utility model discloses an accurate electronic camera lens focusing device, including camera lens, box, focus adjustment mechanism and beam split mechanism, wherein: the lens is arranged in the box body; the box body comprises a box cover and a box base which are mutually connected, wherein a first through hole is formed in the box cover, and a second through hole is formed in the box base; the focusing adjusting mechanism is connected with the box body and used for driving the lens to move along the first through hole for focusing; the light splitting mechanism is connected with the box body and located on the image side of the lens and comprises a prism frame, a prism pressing plate and a prism, the prism is arranged in the prism and is abutted to limit through the prism pressing plate, a first window and a second window are further formed in the prism frame, the prism divides the light path of the lens into two parts and carries out image acquisition through image sensors of the first window and the second window respectively. The device can realize electric focusing, has high focusing precision, good stability, clear and stable imaging picture, can collect the picture effect of visible light wave band and infrared wave band, and has compact structure and wide application range.

Description

Precision electric lens focusing device

Technical Field

The utility model belongs to the technical field of the camera lens focus, concretely relates to accurate electronic camera lens focusing device.

Background

With the wider application of the image pickup picture auxiliary technology in medical operations, the applications of endoscope detection, minimally invasive surgery and the like are more mature, the requirements of medical equipment and surgery are more refined, and higher requirements are also put forward on medical lenses. The existing medical lens mainly adopts a fixed-focus lens, is difficult to realize automatic zooming, generally needs to be matched with a complex base structure, has large integral volume, can not be assembled by partial cameras, is inconvenient to use, and often has a shaking phenomenon in the focusing process for the common zoom lens, can not ensure the focusing stability, thereby influencing the definition of collected pictures, and in addition, the existing medical lens can not simultaneously meet the detection requirements of visible light wave bands and infrared wave bands. Therefore, an electric lens focusing device meeting the requirements of precise focusing, small volume and double spectrums is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned problem, provide an accurate electronic camera lens focusing device, the device can realize electronic focus, and the focusing precision is high, stability is good, and the image frame's is clear stable to can gather the picture effect of visible light wave band and infrared band, satisfy the detection demand of visible light wave band and infrared band, compact structure.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

the utility model provides a pair of accurate electronic camera lens focusing device, including camera lens, box, focus adjustment mechanism and beam split mechanism, wherein:

the lens is arranged in the box body;

the box body comprises a box cover and a box base which are connected with each other, wherein a first through hole is formed in the box cover, a second through hole is formed in the box base, and the first through hole and the second through hole are oppositely arranged and are vertical to the optical axis direction of the lens;

the focusing adjusting mechanism is connected with the box body and used for driving the lens to move along the first through hole for focusing;

the light splitting mechanism is connected with the box body and located on the image side of the lens and comprises a prism frame, a prism pressing plate and a prism, the prism is arranged in the prism and abutted to the limit position through the prism pressing plate, a first window and a second window are further formed in the prism frame, image sensors are arranged on the first window and the second window, and the prism divides the light path of the lens into two parts and respectively collects images through the image sensors of the first window and the second window.

Preferably, the camera lens includes lens cone, clamping ring, first mount pad and optical lens group, and the optical lens group is arranged in the lens cone and is supported to spacing through the clamping ring, and the lens cone is connected with first mount pad.

Preferably, the precision electric lens focusing device further comprises a guide mechanism for limiting the rotation of the lens, the guide mechanism comprises a plurality of first guide rods fixedly connected in the box body, the first mounting seat is provided with a plurality of guide holes, and the first guide rods are in one-to-one corresponding sliding fit with the guide holes.

Preferably, the focusing adjusting mechanism comprises a motor mounting bracket, a motor, a screw rod and a nut, the motor mounting bracket is fixedly connected to the box base, the motor is fixedly connected to the motor mounting bracket, the nut is connected with the first mounting base, and during focusing, the motor drives the screw rod to drive the nut to move, so that the lens is driven to move for focusing.

Preferably, the focusing adjustment mechanism further comprises a damping mechanism, the damping mechanism comprises a damping limiting seat and a spring, the damping limiting seat comprises a limiting boss and a second guide rod which are connected with each other, the second guide rod is connected with the first mounting seat in a sliding mode, the limiting boss is connected with a nut, the spring sleeve is arranged on the second guide rod, two ends of the spring sleeve respectively abut against the limiting boss and the first mounting seat, and the second guide rod is parallel to the moving direction of the lens.

Preferably, be equipped with first stopper on the spacing boss, be equipped with second stopper and two spacing seat mounting panels of shock attenuation that are parallel to each other on the first mount pad, the second stopper is located between two spacing seat mounting panels of shock attenuation, second guide arm and two spacing seat mounting panels sliding connection of shock attenuation, the both ends of spring support respectively and lean on spacing boss and the spacing seat mounting panel of one of them shock attenuation, first stopper is spacing between second stopper and another spacing seat mounting panel of shock attenuation.

Preferably, the focusing adjustment mechanism further comprises a limiting mechanism, the limiting mechanism comprises an induction baffle and an optical gate, the induction baffle is mounted on the lens, and the optical gate is mounted on the box base.

Preferably, the first window is opened at the bottom wall of the prism frame, and the second window is opened at the side wall of the prism frame.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the device drives the lens to move through the focusing adjusting mechanism to realize focusing, if a screw rod and nut mechanism is adopted to drive the lens to move, the device has high step pitch precision and less step loss, and the device performs moving guide through the guide mechanism, so that the focusing precision is high and the stability is good;

2) the prism light splitting is used for matching with different image sensors to correspondingly collect the image effects of the visible light wave band and the infrared wave band respectively, so that the detection requirements of the visible light wave band and the infrared wave band are met;

3) a damping mechanism is matched between the focusing adjusting mechanism and the lens, so that the problem of severe shaking of the image caused by shaking can be avoided during focusing, and the imaged image is clear and stable;

4) the first limiting block of the shock absorption limiting seat is limited between the second limiting block and the shock absorption limiting seat mounting plate, and when the nut drives the shock absorption limiting seat to move, the shock absorption limiting seat can be prevented from slipping, and the transmission stability of the screw rod nut mechanism is ensured;

5) the device has compact structure, is beneficial to miniaturization, and is suitable for installation and use in smaller space.

Drawings

Fig. 1 is a schematic view of the focusing device of the present invention;

fig. 2 is an exploded view of the precision electric lens focusing apparatus of the present invention;

FIG. 3 is a schematic view of the structure of the base of the present invention;

fig. 4 is a schematic view of the lens structure of the present invention;

fig. 5 is a schematic view of a partial structure of the focus adjustment mechanism of the present invention;

FIG. 6 is a schematic structural view of the shock-absorbing stop block and the nut of the present invention;

fig. 7 is a schematic view of the prism frame structure of the present invention.

Description of reference numerals: 10. a lens; 20. a box body; 30. a focus adjustment mechanism; 40. a light splitting mechanism; 11. a lens barrel; 12. pressing a ring; 13. a first mounting seat; 14. an optical lens group; 131. a guide hole; 132. an induction baffle; 133. a second limiting block; 134. a shock-absorbing limit seat mounting plate; 21. a box cover; 22. a box base; 23. a first guide bar; 211. a first through hole; 221. a second through hole; 222. a second mounting hole; 223. a third mounting hole; 224. a fourth mounting hole; 31. a motor mounting bracket; 32. a motor; 33. FPC cable arrangement; 34. a screw rod; 35. an optical shutter; 36. an optical shutter mounting plate; 37. a nut; 38. a shock-absorbing limit seat; 39. a spring; 311. a fifth mounting hole; 381. a first stopper; 382. a limiting boss; 383. a second guide bar; 41. a prism frame; 42. a prism pressing plate; 43. a prism; 411. a first window; 412. a second window; 413. a sixth mounting hole; 414. a prism groove.

Detailed Description

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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

As shown in fig. 1 to 7, a precision electric lens focusing apparatus includes a lens 10, a case 20, a focus adjusting mechanism 30, and a beam splitting mechanism 40, wherein:

a lens 10 built in the case 20;

the lens driving device comprises a box body 20 and a driving device, wherein the box body 20 comprises a box cover 21 and a box base 22 which are connected with each other, a first through hole 211 is formed in the box cover 21, a second through hole 221 is formed in the box base 22, and the first through hole 211 and the second through hole 221 are arranged oppositely and are vertical to the optical axis direction of the lens 10;

a focus adjustment mechanism 30 connected to the housing 20 for driving the lens 10 to move for focusing along the first through hole 211;

the light splitting mechanism 40 is connected with the box body 20 and located on the image side of the lens 10, and includes a prism frame 41, a prism pressing plate 42 and a prism 43, the prism 43 is arranged in the prism frame 41 and is abutted and limited by the prism pressing plate 42, the prism frame 41 is further provided with a first window 411 and a second window 412, the first window 411 and the second window 412 are both provided with image sensors, and the prism 43 divides the light path of the lens 10 into two parts and respectively performs image acquisition through the image sensors of the first window 411 and the second window 412.

For convenience of description, the orientation definitions in this application are specifically: taking the lens 10 with the object side up and the image side down, the cover 21 is above the base 22. For reference only, and the specific orientation is not limiting.

The lens 10 is disposed in the box 20, the box base 22 is provided with a plurality of second mounting holes 222, the box cover 21 is fixedly connected to the box base 22 through screws penetrating through the second mounting holes 222, the box 20 can limit a moving range of the lens 10, and prevent the lens 10 from slipping while providing a containing space for the lens 10, and the focusing mechanism 30 is a linear motion mechanism in the prior art, such as a lead screw nut mechanism, a synchronous belt pulley mechanism, a rack and pinion mechanism, and the like, and the focusing mechanism 30 is compact in structure, wherein the first through hole 211 on the box cover 21 is used for avoiding the lens 10, and the second through hole 221 on the box base 22 is located on an image side of the lens 10, so that light of the lens 10 is transmitted to the spectroscopic mechanism 40, and the lens 10 moves to focus along the first through hole 211 (i.e., in the optical axis direction) under the driving of the focusing adjustment mechanism 30. The light splitting mechanism 40 is connected to the outside of the bottom wall of the box base 22, a prism groove 414 for accommodating and limiting the prism 43 is arranged in the prism frame 41, a plurality of sixth mounting holes 413 and a third through hole for avoiding the light of the lens 10 are formed in the upper wall of the prism frame 41, and the prism frame 41 is fixedly connected with the bottom wall of the box base 22 through screws penetrating through the sixth mounting holes 413. The prism 43 splits the light of the lens 10 into different directions, the image sensors adapted and assembled on the first window 411 and the second window 412 can perform image acquisition, and the two image sensors can be different image sensors and respectively receive image effects of a visible light band and an infrared band correspondingly. The case cover 21, the case base 22, the prism frame 41, the prism pressing plate 42, and the prism 43 may have any structure.

The device realizes focusing by driving the lens 10 to move through the focusing adjusting mechanism 30, and has high focusing precision and good stability; the light splitting mechanism 40 is matched with different image sensors to correspondingly collect the image effects of the visible light wave band and the infrared wave band respectively, the detection requirements of the visible light wave band and the infrared wave band are met, the structure is more compact, the miniaturization is facilitated, and the application range is wide.

In an embodiment, the lens 10 includes a lens barrel 11, a pressing ring 12, a first mounting seat 13 and an optical lens group 14, the optical lens group 14 is disposed in the lens barrel 11 and is abutted and limited by the pressing ring 12, and the lens barrel 11 is connected with the first mounting seat 13.

The optical lens group 14 is arranged in the lens barrel 11 and is abutted and limited by the pressing ring 12, and the pressing ring 12 can also play a role in beautifying the appearance. The optical lens assembly 14 may be any optical structure in the prior art, such as one including at least one lens, and the lenses may be limited by spacers. It should be noted that the first mounting base 13 may have any structure, for example, the first mounting base 13 includes a first mounting bracket and a second mounting bracket, the first mounting bracket is disposed perpendicular to the optical axis and connected to the image side of the lens barrel 11, the second mounting bracket is disposed parallel to the optical axis and connected to the first mounting bracket, and the focus adjusting mechanism 30 is connected to the second mounting bracket to drive the lens 10 to move and focus.

In an embodiment, the precision electric lens focusing apparatus further includes a guiding mechanism for limiting rotation of the lens 10, the guiding mechanism includes a plurality of first guide rods 23 fixedly connected in the housing 20, the first mounting seat 13 is provided with a plurality of guiding holes 131, and the first guide rods 23 are in one-to-one sliding fit with the guiding holes 131.

The two ends of the first guide rod 23 are fixed in the case 20 and parallel to the optical axis of the lens 10, the number of the first guide rods can be determined according to actual requirements, and the lengths of the first guide rods can be the same or different. If the number of the first guide rods 23 is two, the bottom wall of the box base 22 is provided with two third mounting holes 223, the box cover 21 is provided with two seventh mounting holes, the first mounting base 13 is provided with two guide holes 131, if the two guide holes 131 are respectively arranged on the first mounting bracket and the second mounting bracket, two ends of the first guide rods 23 are fixedly connected to the corresponding third mounting holes 223 and the corresponding seventh mounting holes and penetrate through the corresponding guide holes 131, so that the lens 10 is limited in rotation, the lens 10 is guaranteed to move along the optical axis direction, and stable focusing is realized.

In an embodiment, the focus adjustment mechanism 30 includes a motor mounting bracket 31, a motor 32, a screw 34 and a nut 37, the motor mounting bracket 31 is fixedly connected to the case base 22, the motor 32 is fixedly connected to the motor mounting bracket 31, the nut 37 is connected to the first mounting base 13, and when focusing, the motor 32 drives the screw 34 to drive the nut 37 to move, thereby driving the lens 10 to move for focusing.

Wherein, a plurality of fifth mounting holes 311 have been seted up on motor installing support 31, if for four, a plurality of fourth mounting holes 224 have been seted up on the lateral wall of case seat 22, and motor installing support 31 and case seat 22 are connected fixedly through the screw that wears to establish fourth mounting hole 224 and fifth mounting hole 311. The motor 32 can be a stepping motor, and when the motor 32 rotates, the screw rod 34 is driven to rotate, so that the nut 37 is driven to move up and down, and the lens 10 is driven by the nut 37 to move and focus, and the stepping precision is high, the step loss is small, and the focusing precision is high. The focusing adjustment mechanism 30 can be in a modular design, if the nut 37 is an open nut, the motor mounting bracket 31, the motor 32 and the lead screw 34 are assembled into a whole, the motor mounting bracket 31 is a U-shaped sheet metal part, two ends of the lead screw 34 are rotatably connected with the motor mounting bracket 31, the motor 32 drives the lead screw 34 to rotate, and the lead screw 34 is clamped into the opening of the nut 37 during assembly, so that the matching can be completed, and the assembly is convenient.

In an embodiment, the focus adjustment mechanism 30 further includes a shock absorption mechanism, the shock absorption mechanism includes a shock absorption limiting seat 38 and a spring 39, the shock absorption limiting seat 38 includes a limiting boss 382 and a second guide rod 383, which are connected to each other, the second guide rod 383 is slidably connected to the first mounting seat 13, the limiting boss 382 is connected to the nut 37, the spring 39 is sleeved on the second guide rod 383, two ends of the spring respectively abut against the limiting boss 382 and the first mounting seat 13, and the second guide rod 383 is disposed parallel to the moving direction of the lens 10.

The spring 39 can absorb the vibration generated during the movement of the lens 10, so that the problem of severe shaking of the image caused by shaking can be avoided during focusing, and the imaged image is clear and stable.

In an embodiment, a first limit block 381 is arranged on the limit boss 382, a second limit block 133 and two shock-absorbing limit seat mounting plates 134 which are parallel to each other are arranged on the first mounting seat 13, the second limit block 133 is located between the two shock-absorbing limit seat mounting plates 134, the second guide rod 383 is slidably connected with the two shock-absorbing limit seat mounting plates 134, two ends of the spring 39 respectively abut against the limit boss 382 and one of the shock-absorbing limit seat mounting plates 134, and the first limit block 381 is limited between the second limit block and the other shock-absorbing limit seat mounting plate 134.

Wherein, the spacing seat mounting panel 134 of shock attenuation perpendicular to optical axis direction sets up, and the both ends of spring 39 support respectively to lean on spacing boss 382 and the spacing seat mounting panel 134 of shock attenuation that is close to case lid 21 place side, and first stopper limit 381 is located second stopper 133 and keeps away from between the spacing seat mounting panel 134 of shock attenuation of case lid 21 place side, when nut 37 drives the spacing seat 38 motion of shock attenuation, can avoid its slippage, guarantees the transmission stability of screw-nut mechanism.

In one embodiment, the focus adjustment mechanism 30 further includes a limiting mechanism, the limiting mechanism includes a sensing barrier 132 and a shutter 35, the sensing barrier 132 is mounted on the lens 10, and the shutter 35 is mounted on the box base 22.

Wherein, when the lens 10 moves, the sensing baffle 132 is driven to move, and the sensing between the sensing baffle 132 and the shutter 35 limits the limit position of the lens 10, such as the limit position for determining the lens 10 retracting into the box 20, the shutter 35 can also be connected to the box base 22 through the shutter mounting plate 36, or directly connected to the box base 22. It should be noted that the sensing stop 132 and the shutter 35 may be mounted at any position on the lens 10 or the box holder 22. In this embodiment, the connection ports of the motor 32 and the optical shutter 35 are collected together to the golden finger interface by the FPC cable 33, and the external device drives the motor 32 to move and cooperate with the optical shutter 35 by being butted with the golden finger interface.

In one embodiment, the first window 411 is opened at the bottom wall of the prism frame 41, and the second window 412 is opened at the side wall of the prism frame 41.

The prism frame 41 has two windows on the front and the side for adaptive assembly of the image sensor, the front represents the direction of the first window 411 facing the lens, the side represents the direction of the second window 412, and can be opened on any side wall of the prism frame 41, the prism 43 splits light and matches with different image sensors to collect the image effects of the visible light band and the infrared band, and the detection requirements of the visible light band and the infrared band can be met.

The working principle is as follows:

when focusing, the motor 32 of the focus adjustment mechanism 30 drives the screw rod 34 to drive the nut 37 to move up and down, thereby driving the lens 10 to move up and down for focusing. In the moving process of the lens 10, the guide mechanism guides the lens and the spring 39 absorbs the vibration generated in the moving process, so that the severe shaking of the picture caused by shaking can be avoided, and the focusing stability is good. And the device can acquire the image effects of the visible light wave band and the infrared wave band acquired by the lens 10 in real time through two different image sensors under the light splitting action of the prism 43, and can meet the detection requirements of the visible light wave band and the infrared wave band at the same time.

All possible combinations of the technical features of the embodiments described above may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express the more specific and detailed embodiments described in the present application, but not should be interpreted as limiting the scope of the claims of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.

Claims (8)

1. A precision electric lens focusing device is characterized in that: precision electric lens focusing device includes camera lens (10), box (20), focus adjustment mechanism (30) and beam split mechanism (40), wherein:

the lens (10) is arranged in the box body (20);

the box body (20) comprises a box cover (21) and a box base (22) which are connected with each other, a first through hole (211) is formed in the box cover (21), a second through hole (221) is formed in the box base (22), and the first through hole (211) and the second through hole (221) are arranged oppositely and are perpendicular to the optical axis direction of the lens (10);

the focus adjusting mechanism (30) is connected with the box body (20) and is used for driving the lens (10) to move and focus along the first through hole (211);

the light splitting mechanism (40) is connected with the box body (20) and located on the image side of the lens (10), and comprises a prism frame (41), a prism pressing plate (42) and a prism (43), the prism (43) is arranged in the prism frame (41) and is abutted and limited through the prism pressing plate (42), a first window (411) and a second window (412) are further formed in the prism frame (41), image sensors are arranged on the first window (411) and the second window (412), and the prism (43) divides the light path of the lens (10) into two parts and carries out picture acquisition through the image sensors of the first window (411) and the second window (412) respectively.

2. The precision electric lens focusing apparatus of claim 1, wherein: the lens (10) comprises a lens barrel (11), a pressing ring (12), a first mounting seat (13) and an optical lens group (14), the optical lens group (14) is arranged in the lens barrel (11) and is abutted and limited through the pressing ring (12), and the lens barrel (11) is connected with the first mounting seat (13).

3. The precision electric lens focusing apparatus of claim 2, wherein: the precision electric lens focusing device further comprises a guide mechanism used for limiting the rotation of the lens (10), the guide mechanism comprises a plurality of guide rods (23) fixedly connected in the box body (20), a plurality of guide holes (131) are formed in the first mounting seat (13), and the first guide rods (23) are in one-to-one corresponding sliding fit with the guide holes (131).

4. The precision electric lens focusing apparatus of claim 2, wherein: focus adjustment mechanism (30) include motor installing support (31), motor (32), lead screw (34) and nut (37), motor installing support (31) rigid coupling in on case seat (22), motor (32) rigid coupling in on motor installing support (31), nut (37) are connected with first mount pad (13), during the focusing, motor (32) drive lead screw (34) drive nut (37) motion, thereby drive camera lens (10) remove the focusing.

5. The precision electric lens focusing apparatus of claim 4, wherein: the focusing adjustment mechanism (30) further comprises a damping mechanism, the damping mechanism comprises a damping limiting seat (38) and a spring (39), the damping limiting seat (38) comprises a limiting boss (382) and a second guide rod (383) which are connected with each other, the second guide rod (383) is connected with the first mounting seat (13) in a sliding manner, the limiting boss (382) is connected with a nut (37), the spring (39) is sleeved on the second guide rod (383) and the two ends of the spring are respectively abutted against the limiting boss (382) and the first mounting seat (13), and the second guide rod (383) is parallel to the moving direction of the lens (10).

6. The precision electric lens focusing apparatus of claim 5, wherein: be equipped with first stopper (381) on spacing boss (382), be equipped with second stopper (133) and two spacing seat mounting panels of shock attenuation (134) that are parallel to each other on first mount pad (13), second stopper (133) are located two between spacing seat mounting panel of shock attenuation (134), second guide arm (383) and two spacing seat mounting panel of shock attenuation (134) sliding connection, the both ends of spring (39) support respectively and lean on spacing boss (382) and one the spacing seat mounting panel of shock attenuation (134), first stopper (381) spacing in second stopper and another between the spacing seat mounting panel of shock attenuation (134).

7. The precision electric lens focusing apparatus of claim 1, wherein: the focusing adjusting mechanism (30) further comprises a limiting mechanism, the limiting mechanism comprises an induction baffle (132) and an optical shutter (35), the induction baffle (132) is installed on the lens (10), and the optical shutter (35) is installed on the box base (22).

8. The precision electric lens focusing apparatus of claim 1, wherein: the first window (411) is opened at the bottom wall of the prism frame (41), and the second window (412) is opened at the side wall of the prism frame (41).

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