CN109752812A - Lens removal mechanism and optical equipment - Google Patents

Abstract

The present invention provides a kind of camera lens removing mechanism and the optical device using the camera lens removing mechanism, and external force suffered by the transmission component is transmitted to the connection frame by changing the angle between the first connecting rod and the second connecting rod by camera lens removing mechanism.The invention is convenient reliable, and transmission is laborsaving and relatively simple for structure, easy to assembly, cost is relatively low, practical.

Description

Lens removal mechanism and optical equipment

technical field

The present invention relates to the field of optics, in particular to a lens removal mechanism and an optical device using the lens removal mechanism.

Background technique

Most of the engineering projector lenses are interchangeable lenses, which need to be replaced frequently to achieve different picture effects. The convenience and stability of the disassembly of the transmission device are particularly important. During the lens disassembly process, the lens removal mechanism of the prior art usually requires that the action direction of the external force is consistent with the disassembly direction of the lens, which is inconvenient to use and cannot guarantee reliability.

Therefore, it is necessary to provide a new lens removal mechanism and optical device to solve the above problems.

SUMMARY OF THE INVENTION

The main technical problem to be solved by the present invention is to provide a novel lens removal mechanism to solve the problems of inconvenient disassembly and low reliability in the prior art.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a lens removal mechanism, which includes a connecting frame and a transmission assembly that are detachably connected to the lens, the connecting frame is provided with a lens connecting portion, and the transmission The assembly at least partially passes through the connecting portion, and the transmission assembly includes a first connecting rod and a second connecting rod that are connected to each other and whose included angle is variable, and the transmission assembly can change the first connecting rod and the second connecting rod by changing the first connecting rod and the second connecting rod. The angle between the rods transmits the external force on the transmission assembly to the connecting frame.

Preferably, the first link and the second link are connected by a hinge.

Preferably, the transmission assembly includes a bracket for accommodating the first link and the second link, and a slider provided on the bracket and slidable along the optical axis of the lens, the first link The end away from the second link abuts against the slider and drives the slider to slide.

Preferably, the lens removal mechanism exerts an external force at the hinge connecting the first link and the second link, which is converted into a pushing force along the optical axis through the transmission assembly.

Preferably, 5. the transmission device further comprises an elastic restoring member connected with the first link and/or the second link, and the torsion spring drives the transmission device to restore the initial angle.

Preferably, one end of the second link away from the first link is movably fixed on the bracket through a screw.

Preferably, the second connecting rod is provided with a limiting portion for avoiding excessive force, and the bracket is provided with a limiting groove matching the limiting portion.

Preferably, the torsion spring is provided at the fixed end of the second connecting rod.

Preferably, the connecting frame is a connecting plate provided with a through hole, and the sliding block is disposed at least partially through the through hole.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide an optical device, including a lens, and the above-mentioned lens removal mechanism detachably connected to the lens.

The beneficial effects of the present invention are: different from the prior art, the present invention provides a lens removal mechanism, which removes the transmission assembly by changing the angle between the first link and the second link. The external force received is transmitted to the connecting frame. The invention is convenient and reliable, the transmission is labor-saving, the structure is relatively simple, the assembly is convenient, the cost is low, and the practicability is strong.

Description of drawings

1 is a schematic structural diagram of an optical device lens of the present invention;

Fig. 2 is an enlarged view of part A described in Fig. 1;

FIG. 3 is a schematic diagram of an exploded structure of the lens removal mechanism of the present invention.

Detailed ways

It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

The present invention provides a lens removal mechanism and an optical device using the lens removal mechanism to solve the problems of inconvenient disassembly and low reliability in the prior art. As shown in FIG. 1 and FIG. 2 , which are schematic structural diagrams of the lens portion of the optical device of the present invention, the optical device includes a housing 300 , a lens 200 fixed on the housing 300 , and a lens removal mechanism 100 . The lens removal mechanism 100 is located at the disassembly interface part of the lens of the optical device, and includes a connecting frame and a transmission assembly that is detachably connected to the lens 200, wherein the hook included in the lens 200 is matched with the connecting end to be hooked. When the transmission assembly receives an external force The connecting frame will generate a thrust in the direction of the lens, push the lens to unlock the shrapnel, and then realize the disassembly of the lens with the cooperation of the relevant auxiliary structures.

As shown in FIG. 3 , the connecting frame of the lens removal mechanism 100 is provided with a connecting frame 1. Further, the connecting frame 1 can be detachably connected with the transmission component or the fixing buckle on the lens 200. When the transmission component is stressed, the The connecting frame 1 will be pushed to move along the optical axis direction of the lens, thereby driving the transmission components or the fixing buckle of the lens 200 to generate displacement.

The lens removal mechanism 100 further includes a bracket 2 for accommodating the transmission assembly. The transmission assembly includes a first link 3 and a second link 4. One ends of the first link 3 and the second link 4 are connected together by a hinge, so that the angle between the first link 3 and the second link 4 is It can change with the action of external force. Specifically, during use, an external force is applied to the hinge where the first link 3 and the second link 4 are connected. Preferably, a force-receiving part for receiving external force is provided at the hinge, and the transmission component converts the external force borne by the force-receiving part into a pushing force along the optical axis direction. Further, one end of the second connecting rod 4 away from the hinge is movably fixed on the bracket 2 through a screw 5 . In this way, when the transmission assembly is stressed, since the fixed end of the second connecting rod 4 is fixed on the bracket 2, the external force is transmitted to the first connecting rod through the change of the angle between the first connecting rod 3 and the second connecting rod 4 3. The end away from the hinge forms a driving force along the optical axis.

It should be noted that the fixing method of the second connecting rod 4 is not limited to this, and other fixing methods such as buckles can also be used, as long as one end of the second connecting rod 4 is fixed and can be transmitted to the first connecting rod 3 through the hinge, It is feasible to realize the conversion of force; in addition, the so-called first link and second link do not specifically limit the structure of the components, in fact, they are not necessarily rod-shaped, plate-shaped, sheet-shaped, Even the block shape can be implemented as long as it has a corresponding structure, which can achieve the purpose of the present invention.

Further, the transmission assembly also includes an elastic restoring member 6 that provides a torsional elastic force for restoring the first connecting rod 3 and the second connecting rod 4 under force, and the first connecting rod 3 and the second connecting rod 4 are clamped after being stressed. The angle becomes larger. At this time, the external force resists the elastic force generated by the elastic reset member 6 to do work. The greater the tension between the first connecting rod 3 and the second connecting rod 4, the greater the elastic force provided by the elastic reset member 6. If the external force After disappearing, the transmission device of the elastic reset member 6 returns to the initial angle between the first connecting rod and the second connecting rod, that is, the angle between the first connecting rod and the second connecting rod when they face the direction of the bracket under no force, The automatic reset of the lens removal mechanism is realized. The elastic restoring member 6 can be connected with the first connecting rod 3 or the second connecting rod 4. Specifically, in this embodiment, the elastic restoring member 6 is arranged on the fixed end of the second connecting rod 4, and is connected to the second connecting rod 4 through the elastic restoring member 6. The screw 5 is assembled to the bracket 2 and connected to the second link 4 . In this embodiment, the elastic reset member 6 is a torsion spring. In other optional embodiments, other structures can also be used, such as a spring connecting the first link and the second link, as long as it can provide reset for the transmission assembly The elastic force used can be implemented.

Further, on the side close to the connecting frame, the transmission assembly of the present invention is further provided with a sliding block 7 for matching with the connecting frame 1. In this embodiment, the connecting frame 1 is a connecting plate provided with a through hole, The slider 7 is disposed at least partially through the through hole, and the slider can exert a force on the lens hook hooked with the through hole, so that the lens is disconnected from the connecting lever. One end of the slider 7 away from the connecting plate is in contact with the first connecting rod 3 , and can slide along the optical axis direction of the lens under the driving of the first connecting rod 3 . Thus, the force on the first link 3 is transmitted to the connecting frame 1 and then to the lens 200 . Specifically, the slider 7 is provided with a fixing groove 71 which is recessed in the direction away from the first connecting rod 3 near the first connecting rod 3. The side of the first connecting rod 3 away from the hinge is inserted into the fixing groove 71, and further passes through a The latch 8 is fixed to further increase the linkage between the first link 4 and the slider 7 .

Further, the second connecting rod 4 is also provided with a limiting portion 41 for avoiding excessive force. Correspondingly, the bracket 2 is provided with a limiting groove matching the limiting portion 41 . When the external force is too large and the angle between the first connecting rod 3 and the second connecting rod 4 is large to a certain extent, the limiting portion 41 increases with the included angle, and the movement of the second connecting rod 4 will contact the bracket 2 There are limit grooves on the upper part, so as to avoid the failure of the torsion spring due to excessive displacement and improve the reliability of the product.

The present invention also provides an optical device including the above-mentioned lens removal mechanism, the optical device includes a projection device such as a projector, a shooting device such as a video camera, a camera, etc., and the lens removal mechanism 100 is located at the lens of the optical device. The dismounting interface part includes a connecting frame and a transmission assembly that are detachably connected to the lens 200, wherein the hook included in the lens 200 is matched with the connecting end to be hooked, and when the transmission assembly receives an external force, the connecting frame will generate a thrust in the direction of the lens , push the lens to unlock the shrapnel, and then realize the disassembly of the lens with the cooperation of the relevant auxiliary structures.

The beneficial effects of the present invention are: different from the prior art, the present invention provides a lens removal mechanism, which removes the transmission assembly by changing the angle between the first link and the second link. The external force received is transmitted to the connecting frame. The invention is convenient and reliable, the transmission is labor-saving, the structure is relatively simple, the assembly is convenient, the cost is low, and the practicability is strong.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A lens removal mechanism, characterized in that it comprises a connecting frame detachably connected to the lens and a transmission assembly, the connecting frame is provided with a lens connecting part, and the transmission assembly at least partially passes through the connecting part, so that the The transmission assembly includes a first connecting rod and a second connecting rod which are connected to each other and whose included angle can be changed. The external force on the assembly is transmitted to the connecting frame. 2 . The lens removal mechanism of claim 1 , wherein the first link and the second link are connected by a hinge. 3 . 3 . The lens removal mechanism according to claim 1 , wherein the transmission assembly comprises a bracket for accommodating the first link and the second link, and the bracket is arranged on the bracket and can move along the lens. 4 . The slider slides in the direction of the optical axis, the end of the first link away from the second link abuts the slider, and drives the slider to slide. 4 . The lens removal mechanism according to claim 3 , wherein the lens removal mechanism is provided with a force for receiving external force at the hinge where the first link and the second link are connected. 5 . part, the transmission component converts the external force borne by the force-receiving part into a pushing force along the optical axis direction. 5. The lens removal mechanism according to claim 3, wherein the transmission device further comprises an elastic restoring member connected with the first link and/or the second link, the torsion spring Drive the transmission device to restore the initial angle. 6 . The lens removal mechanism according to claim 5 , wherein one end of the second link away from the first link is movably fixed on the bracket by a screw. 7 . 7 . The lens removal mechanism according to claim 6 , wherein the torsion spring is provided at the fixed end of the second link. 8 . 8 . The lens removal mechanism according to claim 6 , wherein a limiting portion for avoiding excessive force is provided on the second link, and a limiting portion is provided on the bracket. 9 . matching limit slots. 9 . The lens removal mechanism according to claim 3 , wherein the connecting frame is a connecting plate provided with a through hole, and the slider is disposed at least partially through the through hole. 10 . 10. An optical device, comprising a lens and the lens removal mechanism according to any one of claims 1 to 9, which is detachably connected to the lens.