Lens interpupillary distance adjusting device

Abstract

The lens interpupillary distance adjusting device comprises a lens sliding female rod, a lens sliding male rod, interpupillary distance teeth and an interpupillary distance adjusting driving motor, the lens sliding female rod and the lens sliding male rod are in telescopic connection, and the lens sliding female rod and the lens sliding male rod are each provided with a lens installation element; the lens sliding female rod and the lens sliding male rod are in matched limiting connection with corresponding interpupillary distance teeth respectively, the number of the interpupillary distance teeth is two, the interpupillary distance teeth are in meshed connection with a driving gear arranged on a rotor of an interpupillary distance adjusting driving motor, the two interpupillary distance teeth synchronously and relatively move in the horizontal direction, and the distance between the two interpupillary distance teeth and the horizontal limit movement distance of the driving gear are the same; and an interpupillary distance adjusting trigger switch is arranged at the position of any interpupillary distance tooth horizontal limit moving distance. The beneficial effects of the utility model are that a structure capable of rotating around the shaft and translating along the shaft is utilized, and the turnover function of the red and blue lenses can be supported on the basis of the function of changing the interpupillary distance by translating the red and blue lenses. The problem of poor equipment accuracy caused by step loss accumulation of the stepping motor is solved.

Description

Technical Field

[0001] The utility model relates to the field of electromechanical control, and more specifically to a lens pupil distance adjustment device. Background Art

[0002] In the prior art, in order to realize the flipping of red and blue lenses and the adjustment of their pupil distance, there are currently some structures for lens flipping and pupil distance adjustment.

[0003] Among them, the lens flipping structure, such as the manual flipping of the sunshade of glasses, the flipping of the sunglasses lens superimposed on the glasses lens, the flipping of the car rearview mirror, etc.

[0004] Interpupillary distance adjustment structure, such as manually screwing a thread to adjust the interpupillary distance, adjusting the interpupillary distance by spirally rotating an iron ball on a spiral track, etc.

[0005] The above structure has the following problems:

[0006] 1. Some structures are relatively complex and the wear is relatively serious, which increases the use cost and maintenance cost and reduces the service life;

[0007] 2. Some structures only support manual adjustment. When red and blue lenses are needed, you even need to wear red and blue lens glasses yourself, which is very disadvantageous to the automation of the equipment;

[0008] 3. Some structures are driven to the target position only by stepper motors. Since stepper motors rely on alternating coils to generate magnetism and permanent magnets to generate magnetic force to drive rotation, there may be environmental factors that increase the resistance to the rotation of the rotor and cause it to be unable to rotate temporarily, or other devices or program factors may cause the stepper motor to lose steps. For the problem of accumulated lost steps of stepper motors, it is necessary to monitor the behavior of the stepper motor or use other methods to avoid accumulated lost steps. Since the pupil distance of the lens needs to be changed, the two lenses must be separated from each other. Two motors are used to drive the lens to flip. Due to the physical differences between the motor and the mounting structure, the synchronization of the two lenses will be lost.

[0009] 4. In the above structures, lens flipping and pupil distance adjustment are operated independently and cannot be coordinated.

[0010] To sum up, there is currently no effective structure that can simultaneously support the flipping of lenses, especially the red and blue lenses, and the adjustment of the pupil distance between lenses. In addition, the flipping of the red and blue lenses only has two states: lifting and falling. There are many points of pupil distance. At present, there is an urgent need for a structure that can simultaneously realize the motor-driven flipping of the red and blue lenses and the target position determination function, and the motor-driven red and blue lenses to reach the specified position and detection to change the pupil distance function. Utility Model Content

[0011] The utility model overcomes the shortcomings of the prior art and provides a lens pupil distance adjustment device.

[0012] The purpose of the utility model is achieved through the following technical solutions.

[0013] The lens pupil distance adjustment device comprises a lens sliding mother rod, a lens sliding male rod, pupil distance teeth and a pupil distance adjustment driving motor. The lens sliding mother rod and the lens sliding male rod are telescopically connected. A lens mounting element is respectively provided on the lens sliding mother rod and the lens sliding male rod. The lens sliding mother rod and the lens sliding male rod are respectively limitedly connected with corresponding pupil distance teeth. There are two pupil distance teeth. The pupil distance teeth are meshed and connected with a driving gear arranged on a rotor of the pupil distance adjustment driving motor. The two pupil distance teeth move synchronously relative to each other in a horizontal direction. The horizontal limit moving distance between the two pupil distance teeth and the driving gear is the same. A pupil distance adjustment trigger switch is provided at the position of the horizontal limit moving distance of any pupil distance tooth.

[0014] The lens pupil distance adjustment device is provided with a shell, a sliding cavity is provided inside the shell, a driving gear is provided in the sliding cavity, a pupil distance tooth is provided at the upper and lower positions of the driving gear respectively, the two pupil distance teeth move horizontally in the sliding cavity, and the pupil distance adjustment trigger switch is arranged on the shell at any position on both sides of the sliding cavity.

[0015] Eyepiece plate fixing plates are symmetrically arranged on the left and right sides of the shell.

[0016] The pupil distance adjustment trigger switch is a micro switch.

[0017] The pupil distance adjustment drive motor is a stepper motor.

[0018] The lens sliding female rod is nested and arranged outside the lens sliding male rod. The lens sliding female rod is provided with a limit sliding groove. The lens sliding male rod is provided with a limit sliding block. The limit sliding block is slidably arranged in the limit sliding groove.

[0019] The beneficial effects of the utility model are:

[0020] This solution provides an efficient, stable and easy-to-use lens pupil distance adjustment device, which uses a structure that can rotate around an axis and translate along an axis, and can support the flipping function of the red and blue lenses on the basis of realizing the function of changing the pupil distance by translating the red and blue lenses. It effectively solves the problems in the prior art such as the difficulty in maintenance due to the complex structure, the poor accuracy of the equipment due to the accumulation of lost steps of the stepping motor, the failure of automation to meet the equipment requirements, and the inability to simultaneously meet the requirements of lens flipping and pupil distance adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the utility model in cooperation with the lens flipping device;

[0023] Figure 3It is a structural schematic diagram of a lens sliding female rod and a lens sliding male rod;

[0024] In the figure: 11, lens mounting element; 21, pupil distance adjustment drive motor; 22, pupil distance gear; 23, eyepiece plate fixing plate; 24, pupil distance adjustment trigger switch; 31, lens sliding female rod; 32, lens sliding male rod; 33, gear inner screw hole. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further described below through specific embodiments.

[0026] Example

[0027] The lens pupil distance adjustment device comprises a lens sliding mother rod 31, a lens sliding male rod 32, pupil distance teeth 22 and a pupil distance adjustment driving motor 21. The lens sliding mother rod 31 and the lens sliding male rod 32 are telescopically connected. A lens mounting element 11 is respectively provided on the lens sliding mother rod 31 and the lens sliding male rod 32. The lens sliding mother rod 31 and the lens sliding male rod 32 are respectively matched with corresponding pupil distance teeth 22 for limiting connection. There are two pupil distance teeth 22. The pupil distance teeth 22 are meshed and connected with a driving gear provided on a rotor of the pupil distance adjustment driving motor 21. The two pupil distance teeth 22 move synchronously relative to each other in a horizontal direction. The horizontal limit moving distance between the two pupil distance teeth 22 and the driving gear is the same. A pupil distance adjustment trigger switch 24 is provided at the position of the horizontal limit moving distance of any pupil distance tooth 22.

[0028] The lens pupil distance adjustment device is provided with a shell, a sliding cavity is provided inside the shell, a driving gear is provided in the sliding cavity, a pupil distance tooth 22 is provided at the upper and lower positions of the driving gear respectively, the two pupil distance teeth 22 move horizontally in the sliding cavity, and the pupil distance adjustment trigger switch 24 is arranged on the shell at any position on both sides of the sliding cavity.

[0029] Eyepiece plate fixing plates 23 are symmetrically arranged on the left and right sides of the housing.

[0030] The pupil distance adjustment trigger switch 24 is a micro switch.

[0031] The pupil distance adjustment driving motor 21 is a stepping motor.

[0032] The lens sliding female rod 31 is nested outside the lens sliding male rod 32. The lens sliding female rod 31 is provided with a limit sliding groove. The lens sliding male rod 32 is provided with a limit sliding block. The limit sliding block is slidably arranged in the limit sliding groove.

[0033] like Figure 1-3As shown, the working principle of the utility model is as follows: the lens pupil distance adjustment device drives the driving gear to work through the rotor of the pupil distance adjustment driving motor 21, and first moves the two pupil distance teeth 22 to the left and right positions respectively until they reach the limit distance position of the corresponding end, thereby triggering the pupil distance adjustment trigger switch 24. When the pupil distance adjustment trigger switch 24 is triggered and closed, another pull-up input high-level pin of the main control board becomes a low potential, triggering an interrupt. Then the main control board sends an instruction to control the pupil distance adjustment driving motor 21 to reverse, drive the pupil distance teeth 22 to reach the specified position, and complete the lens pupil distance adjustment. The above steps eliminate the cumulative effect of the stepping motor's lost steps. The two pupil distance teeth 22 respectively drive the corresponding lens sliding mother rod 31 and the lens sliding male rod 32 to achieve the distance adjustment of the lens mounting element 11 in the horizontal direction.

[0034] Further, if Figure 3 As shown, the lens sliding mother rod 31 and the lens sliding male rod 32 are limited by setting a limit sliding groove and a limit sliding block. In this embodiment, the limit sliding block adopts a circular copper column structure and is fixed by the screw hole 33 in the gear. When the two axes rotate at the same time, the limit sliding block is used to limit the lens sliding mother rod 31 to rotate. When the lens sliding mother rod 31 and the lens sliding male rod 32 are extended and retracted, the limit sliding block slides in the limit sliding groove without affecting its retracting function.

[0035] Further, if Figure 1 and Figure 2 As shown, this embodiment discloses a method for setting a lens pupil distance adjustment device in conjunction with a lens flip device. By setting a rotating motor to control the lens sliding male rod 32 and the lens sliding female rod 31 to rotate, the lens flip device can be adapted to work in coordination with the lens pupil distance adjustment function, thereby solving the problem of not being able to work in coordination at the same time in the prior art.

[0036] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A lens pupil distance adjustment device, characterized in that: The invention comprises a lens sliding female rod, a lens sliding male rod, pupil distance teeth and a pupil distance adjustment driving motor. The lens sliding female rod and the lens sliding male rod are telescopically connected. A lens mounting element is respectively arranged on the lens sliding female rod and the lens sliding male rod. The lens sliding female rod and the lens sliding male rod are respectively matched with corresponding pupil distance teeth for limiting connection. There are two pupil distance teeth. The pupil distance teeth are meshed and connected with a driving gear arranged on a rotor of the pupil distance adjustment driving motor. The two pupil distance teeth move synchronously relative to each other in a horizontal direction. The horizontal limit moving distance between the two pupil distance teeth and the driving gear is the same. A pupil distance adjustment trigger switch is arranged at the position of the horizontal limit moving distance of any pupil distance tooth.

2. The lens pupil distance adjustment device according to claim 1, characterized in that: The lens pupil distance adjustment device is provided with a shell, a sliding cavity is provided inside the shell, a driving gear is provided in the sliding cavity, a pupil distance tooth is provided at the upper and lower positions of the driving gear respectively, the two pupil distance teeth move horizontally in the sliding cavity, and the pupil distance adjustment trigger switch is arranged on the shell at any position on both sides of the sliding cavity.

3. The lens pupil distance adjustment device according to claim 2, characterized in that: Eyepiece disc fixing plates are symmetrically arranged on the left and right sides of the shell.

4. The lens pupil distance adjustment device according to claim 1, characterized in that: The pupil distance adjustment trigger switch is a micro switch.

5. The lens pupil distance adjustment device according to claim 1, characterized in that: The pupil distance adjustment driving motor is a stepping motor.

6. The lens pupil distance adjustment device according to claim 1, characterized in that: The lens sliding female rod is nested and arranged outside the lens sliding male rod. The lens sliding female rod is provided with a limit sliding groove. The lens sliding male rod is provided with a limit sliding block. The limit sliding block is slidably arranged in the limit sliding groove.

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