Pupil distance adjusting structure and multi-view observation equipment

Abstract

The utility model provides an interpupillary distance adjusting structure and multi-view observation equipment. The interpupillary distance adjusting structure comprises a bridge body. And the bridge connecting piece is used for rotatably connecting a lens cone assembly to the bridge body, and the bridge connecting piece is provided with an insertion part. The limiting adjusting assembly comprises a clamping plate connecting piece and a rotary adjusting piece, the bridge connecting piece is connected with the bridge body through the clamping plate connecting piece, a containing hole is formed in the clamping plate connecting piece, the rotary adjusting piece is rotatably arranged on the inserting part in a sleeving mode, and an assembling face between the rotary adjusting piece and the inserting part comprises an inclined face; the rotary adjusting part is rotatably arranged in the containing hole, a limiting structure is arranged between the inner circumferential face of the containing hole and the outer circumferential face of the rotary adjusting part, and the limiting structure is used for limiting the rotation limit range of the rotary adjusting part in the containing hole.

Description

Technical Field

[0001] The present application relates to the technical field of optical equipment, and in particular to a pupil distance adjustment structure and a multi-eye observation device. Background Art

[0002] With the continuous advancement of display, projection, and artificial intelligence technologies, the types and functions of various products that enhance user observation capabilities are constantly being innovated and enriched, such as portable optical devices, VR devices, and head-mounted optical devices. These products, which meet the needs of users for binocular observation, typically include single or dual lens barrels corresponding to each eye. For ease of description, they are collectively referred to as multi-ocular observation devices in this article. Since the interpupillary distance (IPD) of different users may vary, ensuring that binocular observation devices can effectively meet the needs of users with different interpupillary distances is a key factor in product design.

[0003] At present, the inventors have found in their research that the pupil distance adjustment technology of known multi-lens observation equipment mainly relies on structural limiters for adjustment. Taking head-mounted low-light-level night vision devices as an example, night vision devices, as a common night observation tool, can greatly help users improve the efficiency of night activities, target search and identification. Their working principle is to convert low-light light that cannot be recognized by the human eye into visible light, and amplify it through an optical system to improve brightness and clarity, so that the human eye can easily identify and monitor targets. However, the pupil distance adjustment of existing head-mounted low-light-level night vision device technology is simply adjusted by structural limiters, which have poor stability and require repeated operation to adjust the pupil distance each time it is used, causing inconvenience. Summary of the Invention

[0004] In order to solve the existing technical problems, the present application provides an interpupillary distance adjustment structure and a multi-eye observation device that are simple to operate, more convenient to adjust the interpupillary distance and highly stable.

[0005] In a first aspect, a pupil distance adjustment structure is provided, comprising:

[0006] Bridge body;

[0007] A bridge connector, used to rotatably connect the lens barrel assembly to the bridge body, and the bridge connector is provided with a plug-in portion;

[0008] The limit adjustment assembly includes a splint connector and a rotation adjustment member, the splint connector connects the bridge frame connector with the bridge frame body, the splint connector is provided with a receiving hole, the rotation adjustment member can be rotatably mounted on the plug-in part, the assembly surface between the rotation adjustment member and the plug-in part includes an inclined surface, the rotation adjustment member can be rotatably installed in the receiving hole, and a limit structure is provided between the inner circumference of the receiving hole and the outer circumference of the rotation adjustment member, the limit structure is used to limit the rotation limit range of the rotation adjustment member in the receiving hole.

[0009] In a second aspect, a multi-eye observation device is further provided, comprising a left lens barrel assembly, a right lens barrel assembly, and the pupil distance adjustment structure described in any embodiment of the present application;

[0010] The left lens barrel assembly and the right lens barrel assembly are respectively connected to the bridge body through the corresponding bridge connecting members.

[0011] The interpupillary distance adjustment structure provided in the above embodiment is provided with a bridge connector and a limit adjustment component. The limit adjustment component connects the bridge connector to the bridge body, thereby rotatably connecting the lens barrel assembly to the bridge body through the bridge connector. By utilizing the relative rotation between the rotation adjustment member and the plug-in portion and the inclined assembly surface, and the relative rotation between the rotation adjustment member and the splint connector and the limit structure to limit the rotation limit range, the bridge connector can be rotated relative to the bridge body to a certain extent under the action of different sizes of rotational external forces (such as directly holding the lens barrel and rotating it in a relatively away direction) based on the relative rotation between the rotation adjustment member and the splint connector. Adjustment of the pupil distance size within a certain range; based on the relative rotation between the rotary adjustment member and the plug-in portion, the rotation limit range can be changed to change the range of pupil distance adjustment; and after the adjustment is in place, the external force can be removed and the inclined surface between the rotary adjustment member and the plug-in portion can be used to provide axial friction and radial friction to maintain the required pupil distance size. In this way, not only is the operation simple and the pupil distance adjustment more convenient, the inclined surface is directly used to maintain the target pupil distance size, and the stability is high. In addition, the hidden limiting structure between the rotary adjustment member and the receiving hole supports the setting of the rotation limit range based on the pupil distance size of different users. After one person completes the adjustment, the person can easily and simply reach the pupil distance position in subsequent use.

[0012] In the above embodiments, the multi-eye observation device and the corresponding pupil distance adjustment structure embodiment belong to the same concept, and thus have the same technical effects as the pupil distance adjustment structure embodiment, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of a multi-viewing device in one embodiment.

[0014] Figure 2for Figure 1 Schematic diagram of the multi-eye observation device in a folded state.

[0015] Figure 3 for Figure 1 A partial schematic diagram of the assembly position of the limit adjustment component in the multi-eye observation device shown.

[0016] Figure 4 Taking the right splint connector as an example, this is a cross-sectional view of the limit adjustment assembly at its assembly position.

[0017] Figure 5 Taking the right splint connector as an example, this is a top view of the limit adjustment assembly at its assembly position.

[0018] Figure 6 This is a top view of the right splint connection.

[0019] Figure 7 It is a three-dimensional schematic diagram of the right splint connection.

[0020] Figure 8 A top view of the rotary adjustment member.

[0021] Figure 9 It is a three-dimensional schematic diagram of the rotary adjustment member.

[0022] Figure 10 Schematic diagram of an exploded view of a multi-viewing device in one embodiment.

[0023] Figure 11 Schematic diagram of another state of the multi-viewing device in one embodiment.

[0024] Component Symbol Description

[0025] Lens barrel assembly 11, left lens barrel assembly 111, right lens barrel assembly 112, bridge body 13, bridge connector 14, left bridge connector 141, right bridge connector 142, plug-in portion 143, fixing pin 17, fastening screw 18, gasket 19, limit adjustment assembly 20, splint connector 21, receiving hole 210, left splint connector 211, right splint connector 212, first limit structure 215, rotation adjustment member 23, mounting hole 230, second limit structure 231 DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the scope of protection of the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] In the following description, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate description and simplify the present invention. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0029] In the following description, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0030] In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments. It should be noted that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0031] In the following description, the terms "first, second, and third" are merely used to distinguish similar objects and do not represent a specific order or quantity of the objects. It can be understood that "first, second, and third" can be interchanged in order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0032] See also Figure 1 , is a multi-eye observation device provided in an embodiment of the present application, including a left lens barrel assembly 111, a right lens barrel assembly 112 and an pupil distance adjustment structure.

[0033] Among them, the left lens barrel assembly 111 and the right lens barrel assembly 112 correspond to the user's binocular eyes respectively, and the left lens barrel assembly 111 and the right lens barrel assembly 112 can each be a single lens barrel or a double lens barrel. That is, the multi-ocular observation device can refer to a binocular observation device in which the left lens barrel assembly 111 and the right lens barrel assembly 112 are each a single lens barrel, or a multi-ocular observation device in which the left lens barrel assembly 111 and the right lens barrel assembly 112 are each a double lens barrel or other multiple lens barrels.

[0034] Please refer to Figures 2 to 4 The interpupillary distance adjustment structure includes: a bridge body 13; a bridge connector 14 for rotatably connecting the lens barrel assembly 11 to the bridge body 13, and a plug-in portion 143 ( Figure 10 、 Figure 11 ) ; The limit adjustment component 20 includes a splint connector 21 and a rotation adjustment member 23. The splint connector 21 connects the bridge connector 14 to the bridge body 13. A receiving hole 210 is provided on the splint connector 21. The rotation adjustment member 23 can be rotatably mounted on the plug-in portion 143. The assembly surface between the rotation adjustment member 23 and the plug-in portion 143 includes an inclined surface. The rotation adjustment member 23 can be rotatably installed in the receiving hole 210. A limit structure is provided between the inner circumference of the receiving hole 210 and the outer circumference of the rotation adjustment member 23. The limit structure is used to limit the rotation limit range of the rotation adjustment member 23 in the receiving hole 210.

[0035] The bridge connector 14 rotatably connects the lens barrel assembly 11 and the bridge body 13. When the pupil distance adjustment structure adjusts the pupil distance, the bridge connector 14 and the corresponding lens barrel assembly 11 together form a combination that is rotatable relative to the bridge body 13. It should be noted that the bridge connector 14 can be formed as an independent structural member, fixedly connected to the corresponding lens barrel assembly 11 to form a combination, and then connected to the bridge body 13 in the state of the combination. In other optional embodiments, the bridge connector 14 and the lens barrel assembly 11 can also be set as an integral structure, and the lens barrel assembly 11 formed as an integral structure with the bridge connector 14 is rotatably connected to the bridge body 13 through the bridge connector 14; or, the bridge connector 14 and the bridge body 13 can also be set as an integral structure, and the bridge connector 14 is formed as a relatively rotatable structural member on the bridge body 13, and then connected to the lens barrel assembly 11.

[0036] The rotational external force refers to the force applied from the outside that can cause the bridge connector 14 to rotate relative to the bridge body 13. For example, the user can directly hold the lens barrel assembly 11 and flip it outward (in the direction where the two lens barrel assemblies 11 are relatively away from each other) or inward (in the direction where the two lens barrel assemblies 11 are close to each other) to apply the rotational external force.

[0037] The rotary adjustment member 23 is rotatably installed in the receiving hole 210 of the splint connector 21, and is rotatably connected relative to the plug-in portion 143 of the bridge connector 14. The splint connector 21 connects the bridge connector 14 to the bridge body 13. In this way, by utilizing the splint connector 21 and the rotary adjustment member 23, the bridge connector 14 can be relatively rotatably adjusted relative to the bridge body 13 based on different sizes of rotational external forces.

[0038] The axial direction refers to the direction along the rotation axis of the rotation adjusting member 23 and the plug-in portion 143, and the radial direction refers to the direction perpendicular to the rotation axis. The inclined surface refers to the direction inclined at a certain angle relative to the rotation axis of the rotation adjusting member 23 and the plug-in portion 143.

[0039] In the above embodiment, the rotation adjustment member 23 and the plug-in portion 143 are relatively rotatable and the assembly surface is an inclined surface, and the rotation adjustment member 23 and the splint connector 21 are relatively rotatable and the limit structure can limit the rotation limit range. Therefore, under the action of different sizes of rotational external forces (such as directly holding the lens barrel in a relatively away direction), the bridge connector 14 can be rotated relative to the bridge body 13 based on the relative rotation between the rotation adjustment member 23 and the splint connector 21, and the pupil distance can be adjusted within a certain range; based on the relative rotation between the rotation adjustment member 23 and the plug-in portion 143 , the rotation limit range can be changed, thereby changing the range of pupil distance adjustment; and after the adjustment is in place, the external force can be removed and the inclined surface between the rotation adjustment member 23 and the plug-in portion 143 can be used to provide axial friction and radial friction to maintain the required pupil distance size. In this way, not only is the operation simple and the pupil distance adjustment is more convenient, the inclined surface is directly used to maintain the target pupil distance size, and the stability is high. Moreover, the hidden limiting structure between the rotation adjustment member 23 and the receiving hole 210 supports the setting of the rotation limit range based on the pupil distance size of different users. After one person completes the adjustment, the person can easily and simply reach the pupil distance position in subsequent use.

[0040] Please refer to Figures 5 to 11 In some embodiments, the limiting structure includes a first limiting structure 215 provided on the inner circumference of the receiving hole 210, and a second limiting structure 231 provided on the outer circumference of the rotating adjustment member 23; during the rotation of the rotating adjustment member 23 in the receiving hole 210, the second limiting structure 231 abuts against one side of the first limiting structure 215 to form a first rotation limit position, and the second limiting structure 231 abuts against the other side of the first limiting structure 215 to form a second rotation limit position. In this way, the limiting structure is formed into a hidden limiting structure. Usually, when not in use, the lens barrel assembly 11 is in a retracted state ( Figure 2As shown), at this time, the second limiting structure 231 on the rotary adjustment member 23 may be in a position abutting against one side of the first limiting structure 215, or may be in a position between the two sides of the first limiting structure 215. During the process of adjusting the pupil distance, the user holds the lens barrel and applies a rotational external force. When the second limiting structure 231 is rotated to abut against the other side of the first limiting structure 215, it is considered that the adjustment is in place. The operation is simple and supports large-angle flip adjustment.

[0041] It should be noted that the first limiting structure 215 and the second limiting structure 231 are located on the same circular line at intervals from each other, and their respective shapes and sizes are not limited, as long as the rotation range of the rotating adjustment member 23 in the receiving hole 210 of the splint connector 21 can meet the range of relative rotation of the lens barrel assembly 11 relative to the bridge body 13.

[0042] In some embodiments, when a first rotational force is applied to the bridge connector 14, the rotary adjustment member 23 rotates relative to the receiving hole 210, and the second limiting structure 231 rotates between the first rotational limit position and the second rotational limit position to form a primary pupillary distance adjustment range. When the second limiting structure 231 is in the first rotational limit position and / or the second rotational limit position, a second rotational force greater than the first rotational force is applied to the bridge connector 14, the rotary adjustment member 23 rotates relative to the plug portion 143 to form a secondary pupillary distance adjustment range. At this time, the relative position between the second limiting structure 231 and the first limiting structure 215 changes. The pupillary distance adjustment range is related to the range of rotation of the lens barrel assembly 11 following the bridge connector 14 relative to the bridge body 13. By designing the spacing between the first limiting structure 215 and the second limiting structure 231, the rotation range of the second limiting structure 231 between the first rotational limit position and the second rotational limit position can correspond to the maximum travel range of the lens barrel assembly 11 following the bridge connector 14 outward rotation relative to the bridge body 13. It can be understood that the maximum pupil distance can be a value that is compatible with the differences in human pupil distance. For example, the human pupil distance range can be 50mm-80mm. It can be designed that when the bridge connector 14 rotates outward relative to the bridge body 13, the second limiting structure 231 abuts against the opposite sides of the first limiting structure 215 respectively, so that the corresponding maximum pupil distance can reach 90mm. In this way, the range of pupil distance support adjustment can be adapted to any user, and the target pupil distance can be any value greater than the minimum pupil distance and the maximum pupil distance.

[0043] In one example, the second limiting structure 231 can be set to abut against one side of the first limiting structure 215 as the starting position, and the bridge connector 14 can be set to be in a retracted state relative to the bridge body 13, and the lens barrel assembly 11 can be in a retracted state at this time; when a relatively small rotational external force (such as less than the friction force of the assembly surface between the rotating adjustment member 23 and the plug-in portion 143) is applied to the bridge connector 14, the range of travel of the bridge connector 14 relative to the bridge body 13 can be driven, that is, the range of rotation angle of the rotating adjustment member 23 in the receiving hole 210 corresponds to the range of rotation. At this time, the range of travel of the bridge connector 14 relative to the bridge body 13 is the first-level pupil distance adjustment range. Within the first-level pupil distance adjustment range, the second limiting structure 231 can be abutted against the other side of the first limiting structure 215 as the end position, and the lens barrel assembly 11 is in the expanded use state. If for a certain user, the size of his or her pupillary distance just corresponds to the rotation angle when the second limiting structure 231 rotates from abutting against one side of the first limiting structure 215 to abutting against the other side of the first limiting structure 215, then the user only needs to apply a relatively small rotational external force to the bridge connector 14 each time using the lens, and flip the lens barrel until the second limiting structure 231 feels the abutment force of the first limiting structure 215 to complete the pupillary distance adjustment.

[0044] If another user has a relatively small interpupillary distance, the second limiting structure 231 can be kept in contact with one side of the first limiting structure 215, applying a relatively larger rotational external force to the bridge connector 14 (e.g., greater than the friction force of the assembly surface between the rotation adjustment member 23 and the plug-in portion). At this time, the rotation adjustment member 23 rotates relative to the plug-in portion 143, and the range of rotation of the bridge connector 14 relative to the bridge body 13 is the secondary interpupillary distance adjustment range. Within the secondary interpupillary distance adjustment range, the relative position between the second limiting structure 231 of the rotation adjustment member 23 and the first limiting structure 215 in the receiving hole 210 is changed. After performing the secondary pupillary distance adjustment, the initial position of the rotary adjustment member 23 within the receiving hole 210 is changed when the lens barrel assembly 11 is in the stowed state. That is, the initial position of the rotary adjustment member 23 within the receiving hole 210 is adjusted so that the second limiting structure 231 is located at a certain intermediate position in the interval between the two sides of the first limiting structure 215 when the lens barrel assembly 11 is in the stowed state. Thereafter, the rotation angle range of the rotary adjustment member 23 within the receiving hole 210 is correspondingly associated with the rotation of the second limiting structure 231 from the intermediate position to the other side of the first limiting structure 215. For example, after the secondary pupillary distance adjustment, the initial position of the rotary adjustment member 23 within the receiving hole 210 can be changed so that when the lens barrel assembly 11 is in the stowed state, the second limiting structure 231 is located at a certain intermediate position in the interval between the two sides of the first limiting structure 215. The maximum pupillary distance corresponding to the rotation of the bridge connector 14 from the intermediate position to the other side of the first limiting structure 215 can reach 75 mm. Each time the user uses the lens barrel assembly 11 subsequently, he or she only needs to apply a relatively small rotational external force to the bridge connector 14 to flip the lens barrel assembly 11 from the folded state until the second limiting structure 231 feels the abutment of the first limiting structure 215 to complete the pupil distance adjustment.

[0045] In some embodiments, the outer contour of the plug-in portion 143 is conical, and the rotary adjustment member 23 is provided with a socket hole whose inner surface is a conical surface that matches the plug-in portion 143. Under the action of a first rotational external force, the rotary adjustment member 23 rotates within the receiving hole 210 to adjust the target interpupillary distance within the primary interpupillary distance adjustment range. When the first rotational external force is removed, the conical surface between the plug-in portion 143 and the rotary adjustment member 23 provides axial and radial friction to maintain the target interpupillary distance. Under the action of a second rotational external force, the rotary adjustment member 23 overcomes the axial and radial friction forces and rotates relative to the plug-in portion 143, changing the position of the first and / or second rotational limit positions, thereby correspondingly changing the primary interpupillary distance adjustment range. In an alternative embodiment, the rotary adjustment member 23 is a conical cap made of a metal material to ensure the required strength. The outer contour of the plug-in portion 143 is conical, and the inner surface of the mounting hole 230 of the conical cap is a conical surface that matches the outer contour of the plug-in portion 143. The target pupil distance may refer to the pupil distance corresponding to any position within the adjustment range of the bridge connector 14 relative to the bridge body 13. In the embodiment of the present application, the target pupil distance is the pupil distance corresponding to the first-level pupil distance adjustment range.

[0046] The side of the multi-eye observation device that is relatively close to the user's eyes when in use is the observation side, and the side that is relatively far from the user's eyes is the lens side. In this embodiment, the axial direction refers to the direction of the line connecting the observation side and the lens side. The size of the outer contour of the plug-in portion 143 gradually increases from the observation side to the lens side, and the diameter of the mounting hole 230 also gradually increases from the observation side to the lens side. The plug-in portion 143 can be installed in the mounting hole 230 of the conical cap with a tight fit. The assembly surface between the rotary adjustment member 23 and the plug-in portion 143 is formed as a conical surface, so that under the action of a rotational external force (such as directly holding the lens barrel and rotating it in a relatively away direction), the bridge connector 14 can be rotated relative to the bridge body 13 to adjust the pupil size, and after the adjustment is in place, the external force can be removed and the axial friction and radial friction provided by the conical surface can be used to maintain the required pupil size. In this way, the end face friction formed between the plug-in portion 143 of the bridge connector 14 and the rotary adjustment member 23 can be used to achieve stepless adjustment of the pupil size. Not only is the operation simple and the pupil distance adjustment more convenient, but in the absence of external force, the conical surface can simultaneously provide axial and radial components of force to maintain the target pupil size, and has high stability.

[0047] In some embodiments, the first limiting structure 215 includes a first limiting rib disposed on the inner circumference of the receiving hole 210, and the second limiting structure 231 includes a second limiting rib disposed on the outer circumference of the rotary adjustment member 23. The first limiting structure 215 and the second limiting structure 231 are formed as ribs located on the same annular surface and spaced apart from each other, making it convenient to adjust the maximum range of the pupillary distance by adjusting the shape and size of the ribs.

[0048] In one optional embodiment, the first limiting structure 215 includes two protrusions spaced apart along the circumference of the receiving hole 210; and / or the second limiting structure 231 includes an arc-shaped protrusion extending a predetermined length along the circumference of the rotational adjustment member 23. The protrusion abuts against one of the protrusions to achieve a first rotational limit position, and the protrusion abuts against the other protrusion to achieve a second rotational limit position. The first limiting structure 215 utilizes two protrusions spaced apart, and the two protrusions can be symmetrically arranged, which facilitates simplifying the assembly of the rotational adjustment member 23 into the receiving hole 210 of the splint connector 21 and reduces the assembly precision requirements for the rotational adjustment member 23. The second limiting structure 231 utilizes a continuous arc-shaped protrusion. The number of protrusions can be adjusted to achieve a desired length of the second limiting structure 231, thereby designing the maximum rotation angle of the rotational adjustment member 23 within the receiving hole 210. This correspondingly adjusts the range of rotation of the bridge connector 14 relative to the bridge body 13 to achieve a desired interpupillary distance.

[0049] In some embodiments, the splint connector 21 includes a first connection portion that connects to the bridge body 13. The first connection portion includes a first connection hole and a second connection hole located on different sides of the bridge body 13. A first fastener passes through the bridge body 13 and connects to the first connection hole. A second fastener passes through the second connection hole and connects to the bridge body 13, thereby connecting the splint connector 21 to the bridge body 13. The number of first connection holes and first fasteners can be one or more. In this embodiment, there are two first connection holes and two first fasteners, respectively. The first fastener is a fixing pin 17. The number of second connection holes and second fasteners can be one or more. In this embodiment, there are two first connection holes and two first fasteners, respectively. The second fastener is a fastening screw 18. The first fastener and the second fastener connect the splint connector 21 to the bridge body 13 from different sides of the bridge body 13, maintaining a stable connection. Optionally, a threaded sleeve or a heat-resistant nut is provided on the bridge body 13 at the location where the second fastener connects to ensure strength and further ensure connection stability.

[0050] Optionally, the splint connector 21 includes a second connection portion connected to the bridge connector 14; a receiving hole 210 is provided on the second connection portion, and a third fastener is inserted through the rotation adjustment member 23 and connected to the bridge connector 14, thereby connecting the splint connector 21 to the bridge connector 14. In this embodiment, the third fastener is also a fastening screw 18. The direction in which the third fastener connects the splint connector 21 to the bridge connector 14 is the same as the direction in which the second fastener connects the splint connector 21 to the bridge body 13. Optionally, a threaded sleeve or heat-capacitance nut is provided on the bridge connector 14 at the location where the third fastener connects to ensure strength and further connection stability. Optionally, a gasket 19 is provided between the end faces of the third fastener and the rotary adjusting member 23 against which they abut. The outer diameter of the gasket 19 is larger than the outer diameter of the end of the third fastener. The gasket 19 is made of metal material to ensure its strength. The outer diameter of the gasket 19 is set to be larger than the outer diameter of the end of the third fastener, which can increase the contact area between the third fastener and the rotary adjusting member 23, and can disperse the pressure applied by the third fastener to the rotary adjusting member 23 when connected, thereby protecting the rotary adjusting member 23 from wear.

[0051] In some embodiments, the bridge connector 14 includes a left bridge connector 141 and a right bridge connector 142 corresponding to the left lens barrel assembly 111 and the right lens barrel assembly 112, respectively. The splint connector 21 includes a left splint connector 211 and a right splint connector 212 corresponding to the left bridge connector 141 and the right bridge connector 142, respectively. The left splint connector 211 and the right splint connector 212 are each provided with a groove and a spring-loaded cushion disposed within the groove on the side that contacts the end surface of the bridge body 13. In this embodiment, the multi-eye observation device has a symmetrical structure, and the bridge connector 14 and the splint connector 21 are respectively arranged to correspond to the lens barrel assembly 11 one by one. During the pupil distance adjustment process, the adjustment of the left lens barrel assembly 111 relative to the bridge body 13 through the left bridge connector 141 and the adjustment of the right lens barrel assembly 112 relative to the bridge body 13 through the right bridge connector 142 can be independent of each other, that is, the first angle of the left lens barrel assembly 111 relative to the bridge body 13 through the left bridge connector 141 and the second angle of the right lens barrel assembly 112 relative to the bridge body 13 through the right bridge connector 142 can be the same or different.

[0052] In order to have a more holistic understanding of how the pupil distance adjustment structure provided in the embodiment of the present application can achieve pupil distance adjustment, the key structure and principle of pupil distance adjustment are explained below using the right eye as an example.

[0053] like Figure 4As shown, the rotary adjustment member 23 is installed in the receiving hole 210 of the right splint connector 212 and is sleeved around the plug-in portion 143 of the right bridge connector 142. The assembly surface between the rotary adjustment member 23 and the plug-in portion 143 is a tapered surface. The third fastener compresses the right bridge connector 142 and the rotary adjustment member 23, ensuring close contact between the plug-in portion 143 of the right bridge connector 142 and the rotary adjustment member 23 through the assembly surface. The locking force of the third fastener can adjust the contact area of ​​the assembly surface, thereby adjusting the axial and radial friction forces generated by the assembly surface to maintain the desired interpupillary distance. It also supports the relative rotation of the rotary adjustment member 23 relative to the plug-in portion 143 under a preset external force state, thereby facilitating the design and implementation of an interpupillary distance adjustment range. The provision of a hidden limit structure between the rotary adjustment member 23 and the inner circumference of the receiving hole 210 supports the relative rotation of the rotary adjustment member 23 within a certain range within the receiving hole 210, facilitating the design and implementation of another interpupillary distance adjustment range.

[0054] The interpupillary distance is adjusted as follows:

[0055] 1. When a first rotational external force is applied to rotate the right lens barrel assembly 112 and the right bridge connector 142, the friction between the assembly surfaces of the right bridge connector 142 and the rotary adjustment member 23 causes the right bridge connector 142 to drive the corresponding rotary adjustment member 23 to rotate within the receiving hole 210 until the second limiting structure 231 of the rotary adjustment member 23 abuts the first limiting structure 215 of the right splint connector 212, achieving a first-level pupillary distance adjustment range. During this period, the friction generated between the plug-in portion 143 of the right bridge connector 142 and the rotary adjustment member 23 is defined as a first-level frictional force. The right bridge connector 142 can hover at each position relative to the bridge body 13, achieving the desired pupillary distance.

[0056] 2. The assembly surface between the plug-in portion 143 of the right bridge connector 142 and the rotary adjustment member 23 is a conical contact. Under the first rotational external force, after reaching the physical limit position where the second limiting structure 231 and the first limiting structure 215 abut against each other, a larger rotational external force is applied to the combination of the right lens barrel assembly 112 and the right bridge connector 142, which is called the second rotational external force. At this time, the second rotational external force can overcome the primary friction force between the assembly surface of the rotary adjustment member 23 and the plug-in portion 143 to rotate it, and at the same time drive the combination of the right lens barrel assembly 112 and the right bridge connector 142 to rotate. This step can change the initial relative position between the second limiting structure 231 and the first limiting structure 215, so that when the second limiting structure 231 of the rotating adjustment member 23 abuts against the first limiting structure 215 of the right splint connector 212, the angle of the corresponding right bridge connecting member 142 relative to the bridge body 13 can be changed, so that the corresponding pupil distance size when the second limiting structure 231 and the first limiting structure 215 abut can be adjusted to be equal to the target pupil distance required by the individual user.

[0057] 3. For the same user, after a single second-level interpupillary distance adjustment, the first-level interpupillary distance adjustment range can be set to match the desired interpupillary distance for the user. The next time the user uses the lenses, they only need to apply a light, comfortable first rotational force to rotate the right lens barrel assembly 112 and right bridge connector 142. When they feel the second limiting structure 231 of the rotary adjustment member 23 abut against the first limiting structure 215 within the receiving hole 210, the interpupillary distance at this point is the ideal interpupillary distance for that user. This reduces the time required to adjust the interpupillary distance, simplifying the adjustment process.

[0058] If the user of the binocular observation device is changed, when adjusting the pupil distance, the adjustment can be made according to step 2, so that the conical surface of the plug-in portion 143 of the right bridge connector 142 overcomes the primary friction force between the assembly surface of the rotary adjustment member 23 and causes it to rotate, so that the second limiting structure 231 of the rotary adjustment member 23 can be readjusted to abut against the first limiting structure 215 in the receiving hole 210, and the angle of the right bridge connector 142 corresponding to the physical limit position relative to the bridge body 13 can be obtained.

[0059] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A pupil distance adjustment structure, characterized in that: include: Bridge body (13); A bridge connecting member (14) is used to rotatably connect the lens barrel assembly (11) to the bridge body (13), and the bridge connecting member (14) is provided with a plug-in portion (143); A limit adjustment assembly (20) includes a splint connector (21) and a rotation adjustment member (23), wherein the splint connector (21) connects the bridge connecting member (14) with the bridge body (13), a receiving hole (210) is provided on the splint connector (21), and the rotation adjustment member (23) is rotatably mounted on the plug-in portion (143), and an assembly surface between the rotation adjustment member (23) and the plug-in portion (143) includes an inclined surface, and the rotation adjustment member (23) is rotatably mounted in the receiving hole (210), and a limit structure is provided between the inner circumference of the receiving hole (210) and the outer circumference of the rotation adjustment member (23), and the limit structure is used to limit the rotation limit range of the rotation adjustment member (23) in the receiving hole (210).

2. The pupil distance adjustment structure according to claim 1, characterized in that: The limiting structure comprises a first limiting structure (215) provided on the inner circumference of the receiving hole (210), and a second limiting structure (231) provided on the outer circumference of the rotating adjustment member (23); During the rotation of the rotary adjustment member (23) in the receiving hole (210), the second limiting structure (231) abuts against one side of the first limiting structure (215) to form a first rotation limit position, and the second limiting structure (231) abuts against the other side of the first limiting structure (215) to form a second rotation limit position.

3. The pupil distance adjustment structure according to claim 2, characterized in that: When a first rotational external force is applied to the bridge connecting member (14), the rotation adjusting member (23) rotates relative to the receiving hole (210), and the second limiting structure (231) rotates between the first rotation limit position and the second rotation limit position to form a first-level pupil distance adjustment range; When the second limiting structure (231) is at the first rotational limit position and / or at the second rotational limit position, and a second rotational external force greater than the first rotational external force is applied to the bridge connecting member (14), the rotation adjustment member (23) rotates relative to the plug-in portion (143) to form a secondary pupil distance adjustment range, and at this time, the relative position between the second limiting structure (231) and the first limiting structure (215) changes.

4. The pupil distance adjustment structure according to claim 3, characterized in that: The outer contour of the plug-in portion (143) is conical, and a mounting hole (230) is provided in the rotary adjustment member (23), and the inner surface of the mounting hole (230) is a conical surface matching the plug-in portion (143); Under the action of the first rotational external force, the rotational adjustment member (23) rotates in the receiving hole (210) to adjust the target interpupillary distance within the first-level interpupillary distance adjustment range; when the action of the first rotational external force is canceled, the conical surface between the plug-in portion (143) and the rotational adjustment member (23) provides axial friction and radial friction to maintain the target interpupillary distance; Under the action of the second rotational external force, the rotation adjustment member (23) overcomes the axial friction force and the radial friction force and rotates relative to the plug-in portion (143), and the position of the first rotational limit position and / or the second rotational limit position changes, which correspondingly changes the first-level pupillary distance adjustment range.

5. The pupil distance adjustment structure according to claim 2, characterized in that: The first limiting structure (215) comprises a first limiting rib provided on the inner circumference of the receiving hole (210); and the second limiting structure (231) comprises a second limiting rib provided on the outer circumference of the rotary adjustment member (23).

6. The pupil distance adjustment structure according to claim 2, characterized in that: The first limiting structure (215) comprises two protrusions spaced apart along the circumference of the receiving hole (210); and / or the second limiting structure (231) comprises an arc-shaped protrusion extending a certain length along the circumference of the rotary adjustment member (23); The protrusion abuts against one of the convex parts to form a first rotation limit position, and the protrusion abuts against the other convex part to form a second rotation limit position.

7. The pupil distance adjustment structure according to claim 1, characterized in that: The splint connector (21) includes a first connection portion connected to the bridge body (13), and the first connection portion includes a first connection hole and a second connection hole provided on different sides; A first fastener is passed through the bridge body (13) and then connected to the first connection hole, and a second fastener is passed through the second connection hole and then connected to the bridge body (13), thereby connecting the splint connector (21) to the bridge body (13).

8. The pupil distance adjustment structure according to claim 7, characterized in that: The splint connector (21) includes a second connecting portion connected to the bridge connector (14); The receiving hole (210) is provided on the second connecting portion, and a third fastener is passed through the rotation adjusting member (23) and then connected to the bridge connecting member (14), thereby connecting the splint connecting member (21) to the bridge connecting member (14).

9. The pupil distance adjustment structure according to claim 1, wherein: The bridge connecting member (14) comprises a left bridge connecting member (141) and a right bridge connecting member (142) corresponding to the left lens barrel assembly (111) and the right lens barrel assembly (112), respectively; the splint connecting member (21) comprises a left splint connecting member (211) and a right splint connecting member (212) corresponding to the left bridge connecting member (141) and the right bridge connecting member (142), respectively; The sides of the left clamping plate connector (211) and the right clamping plate connector (212) that abut against the end surface of the bridge frame body (13) are respectively provided with a groove and an anti-top spring pad attached to the groove.

10. A multi-viewing device, characterized in that: It comprises a left lens barrel assembly (111), a right lens barrel assembly (112) and a pupil distance adjustment structure according to any one of claims 1 to 9; The left lens barrel assembly (111) and the right lens barrel assembly (112) are respectively connected to the bridge body (13) via corresponding bridge connectors (14).

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