CN219695532U - Moving mechanism for compensating for ocular refractive error - Google Patents

Abstract

The utility model provides a moving mechanism for compensating for the refractive error of eyes, which comprises a linear moving component, wherein the linear moving component is connected with a vision compensating mirror and can drive the vision compensating mirror to move linearly; the adjustable potentiometer can move along with the linear movement assembly to generate corresponding resistance change and transmit the resistance change to the controller; because the volume of the potentiometer is smaller, the occupied space is small, the installation is convenient, the position of the vision compensating mirror can be recorded accurately, the potentiometer is used for replacing the conventional linear displacement sensor, and the internal structure of the ophthalmic optical detection device can be optimized, so that the volume of the ophthalmic optical detection device is reduced.

Description

Moving mechanism for compensating for ocular refractive error

Technical Field

The utility model relates to the technical field of ophthalmic equipment, in particular to a moving mechanism for compensating for ophthalmic ametropia.

Background

In ophthalmic optical inspection devices, such as fundus cameras, it is often necessary to compensate for refractive errors of different human eyes, often to move the position of the compensation lens, and to know precisely the position of the movement of the compensation lens in order to determine the refractive error compensation.

At present, when the refraction compensation of human eyes is realized, a linear movement mechanism is often selected to realize the movement of the vision compensating mirror, and a linear displacement sensor is adopted to record the movement position of the vision compensating mirror, so that the system has a complex structure, a large volume and poor reliability.

Disclosure of Invention

The utility model aims to solve the technical problems of complex system structure, large volume and poor reliability of a moving mechanism in the prior art.

To solve the above-mentioned technical problem, the present utility model provides a movement mechanism for compensating for refractive error of an eye, comprising: the linear moving assembly is connected with the vision compensating mirror and can drive the vision compensating mirror to move linearly; the adjustable potentiometer is connected with the linear movement assembly, can generate corresponding resistance change along with the movement of the linear movement assembly, and transmits the resistance change to the controller.

Further, the adjustable potentiometer is a sliding potentiometer arranged on one side of the linear moving assembly.

Further, the linear moving assembly comprises a guide part, a sliding block which is in sliding connection with the guide part, and the sliding block is connected with the adjustable potentiometer; and the driving device is connected with the sliding block and used for driving the sliding block to move.

Further, the guide mechanism is a linear guide rod.

Further, a linear bearing is fixedly arranged on the sliding block and is in sliding connection with the guide rod.

Further, the driving device comprises a driving motor and a rod-shaped component in driving connection with the driving motor, the rod-shaped component can rotate around the axis of the rod-shaped component, a spiral line acting surface is arranged on the rod-shaped rotating component, and along with the rotation of the rod-shaped component, the sliding block slides on the guiding component under the driving of the spiral line acting surface.

Further, the rod-shaped component is a screw rod in driving connection with the driving motor.

Further, the driving motor is a direct current gear motor.

Further, the device also comprises a bottom plate sliding potentiometer, a guide part, a sliding block and a driving device which are all arranged on the bottom plate.

Further, the device also comprises two mounting plates oppositely arranged on the bottom plate, and the sliding potentiometer, the guide part and the sliding block are arranged between the two mounting plates.

According to the technical scheme, the beneficial effects of the utility model are as follows: because the volume of the potentiometer is smaller, the occupied space is small, the installation is convenient, the position of the vision compensating mirror can be recorded accurately, the potentiometer is used for replacing the conventional linear displacement sensor, and the internal structure of the ophthalmic optical detection device can be optimized, so that the volume of the ophthalmic optical detection device is reduced.

Drawings

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a schematic perspective view of another angle provided by the present utility model.

The reference numerals are explained as follows: 1. a bottom plate; 11. a mounting plate; 111. a guide rod; 112. a screw; 12. sliding potentiometer; 121. an adjustment end; 2. a slide block; 21. a linear bearing; 3. a direct current gear motor.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model will be described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

For the purpose of further illustrating the principles and structure of the present utility model, preferred embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 2, the utility model provides a moving mechanism for compensating refractive error of eyes, which comprises a linear moving component and an adjustable potentiometer, wherein the linear moving component is connected with a vision compensating mirror, the adjustable potentiometer is connected with an external controller, the linear moving component can drive the vision compensating mirror to linearly move, the vision compensating mirror moves to adjust the diopter of a detector, and when the vision compensating mirror moves, the adjustable potentiometer can move along with the linear moving component to generate corresponding resistance change and transmit the resistance change to the controller, and the controller calculates the position of the vision compensating mirror according to the resistance of the adjustable potentiometer and records the position of the vision compensating mirror; because the volume of the potentiometer is smaller, the occupied space is small, the installation is convenient, the position of the vision compensating mirror can be recorded accurately, the potentiometer is used for replacing the conventional linear displacement sensor, and the internal structure of the ophthalmic optical detection device can be optimized, so that the volume of the ophthalmic optical detection device is reduced.

The linear moving assembly is provided with a movable part, the vision compensating mirror is connected with the movable part, the movable part of the linear moving assembly can drive the vision compensating mirror to linearly move, the adjustable potentiometer is connected with the linear moving assembly, the adjustable potentiometer is preferably a sliding potentiometer 12, the sliding potentiometer 12 is provided with an adjusting end 121 which is arranged in a sliding way, the adjusting end 121 slides on the sliding potentiometer 12, and the resistance value of the sliding potentiometer 12 can be changed; the sliding potentiometer 12 and the movable part of the linear movement assembly can be connected in a movable mode or in a fixed mode.

As an embodiment of the connection manner between the linear moving assembly and the sliding potentiometer 12, the sliding potentiometer 12 is fixedly disposed on a movable block (not shown in the figure), the movement of the movable block can drive the vision compensating mirror and the sliding potentiometer 12 to move together, the adjusting end 121 of the sliding potentiometer 12 is fixedly connected with an external fixed component (not shown in the figure), and when the sliding potentiometer 12 moves, the adjusting end 121 of the sliding potentiometer 12 cannot move along with the restriction of the external fixed component, so that the sliding potentiometer 12 and the adjusting end 121 slide relatively, and the sliding potentiometer 12 generates corresponding numerical change.

As another embodiment of the connection mode of the linear moving assembly and the sliding potentiometer 12, as shown in fig. 1-2, the sliding potentiometer 12 is fixedly arranged, the movable block is connected with the adjusting end 121 of the sliding potentiometer 12, the movable block is movably connected with the sliding potentiometer 12 through the adjusting end 121, and the adjusting end 121 can be driven to slide on the sliding potentiometer 12 when the movable block moves, so that the sliding potentiometer 12 generates corresponding resistance change, and the sliding potentiometer 12 in the connection mode is fixedly arranged and does not move along with the movable block, so that the space for the sliding potentiometer 12 to move does not need to be reserved, thereby reducing the space occupied by the mechanism during operation, and further reducing the volume of the ophthalmic optical detection device.

As the preferred embodiment, the ophthalmic optical detection device further comprises a bottom plate 1, wherein the linear moving assembly and the sliding potentiometer 12 are arranged on the bottom plate 1, the bottom plate 1 can integrate the linear moving assembly and the sliding potentiometer 12 together, during installation, only the bottom plate 1 is required to be installed into the detection device, the linear moving assembly and the sliding potentiometer 12 are not required to be installed into the detection device respectively, the linear moving assembly and the sliding potentiometer 12 can be prevented from being directly contacted with the detection device, and accordingly vibration transmitted to the shell of the detection device when the linear moving assembly and the sliding potentiometer 12 operate can be reduced, noise generated when the detection device operates can be reduced, installation of the whole moving mechanism is facilitated, interfaces corresponding to the linear moving assembly and the sliding potentiometer 12 inside the detection device can be reduced, and the internal structure of the ophthalmic optical detection device can be further optimized.

Further in this embodiment, the linear moving assembly includes a guide member fixedly disposed on the base plate 1, a slider 2 is slidably disposed on the guide member, the slider 2 is connected to the adjustment end 121 of the sliding potentiometer 12, and a visibility compensating mirror is disposed on the slider 2; the driving device is arranged on the bottom plate 1 and is connected with the sliding block 2 and used for driving the sliding block 2 to reciprocate along the guide part, and when diopter is adjusted, a user can drive the sliding block 2 to reciprocate along a straight line on the guide part through the driving device, and the sliding block 2 drives the diopter compensation mirror to reciprocate along the straight line to adjust diopter of a tester.

The specific components of the above-described linear motion assembly are not limited to being provided on the base plate 1, and the linear motion assembly may be directly installed inside the optical inspection apparatus when the embodiment of the base plate 1 is not adopted.

Further, the guide mechanism may be a linear guide groove provided on the base plate 1, the slider 2 is slidably provided on the base plate 1 through the guide groove, preferably, the guide mechanism is a guide rod 111 fixedly provided on the base plate 1, the slider 2 is slidably provided on the guide rod 111, and the guide rod 111 has an advantage of lower production cost compared with the guide groove.

Further, the linear bearing 21 is fixedly arranged on the sliding block 2, the sliding block 2 is in sliding connection with the guide rail through the linear bearing 21, and the resistance of the sliding block 2 sliding on the guide rod 111 is reduced due to the arrangement of the linear bearing 21, so that the sliding block 2 can slide more conveniently.

The driving device for driving the sliding block 2 to move comprises a driving motor and a rod-shaped component which is in driving connection with the driving motor, wherein the rod-shaped component can rotate around the axis of the driving motor, a spiral acting surface is arranged on the rod-shaped component, the sliding block 2 is in contact with the spiral acting surface, and the sliding block 2 slides on the guide rod 111 under the driving of the spiral acting surface along with the rotation of the rod-shaped component; the rod-shaped member may be a screw 112, the slider 2 is screwed to the screw 112, or may be a rotating rod, and the outer peripheral surface of the rotating rod is provided with a spiral piece extending spirally in the axial direction thereof, and the slider 2 is in contact with the spiral piece.

The driving motor is preferably a direct-current gear motor 3, and the direct-current gear motor 3 has the characteristic of small volume, is more suitable for being used in ophthalmic examination equipment with small volume, and can further reduce the volume of the ophthalmic optical examination equipment.

Further, two vertical mounting plates 11 are further arranged on the bottom plate 1 at intervals, the two mounting plates 11 are oppositely arranged, a guide rod 111, a sliding block 2 and a sliding potentiometer 12 are arranged between the two mounting plates 11, two ends of the guide rod 111 and a screw 112 are respectively connected with the two mounting plates 11, the guide rod 111 and the screw 112 are arranged on the bottom plate 1 through the mounting plates 11, the two mounting plates 11 have a protective effect, and the guide rod 111, the sliding block 2 and the sliding potentiometer 12 arranged between the two mounting plates can be prevented from being damaged due to the external force.

While the utility model has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the utility model may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. The moving mechanism for compensating the ametropia is characterized by comprising a linear moving assembly, wherein the linear moving assembly is connected with the vision compensating lens and can drive the vision compensating lens to move linearly; the adjustable potentiometer is connected with the linear movement assembly, can generate corresponding resistance change along with the movement of the linear movement assembly, and transmits the resistance change to the controller.

2. The movement mechanism for compensating for refractive error of an eye according to claim 1, wherein the adjustable potentiometer is a sliding potentiometer disposed on one side of the linear movement assembly.

3. A movement mechanism for compensating for refractive error of an eye according to claim 1 or 2, wherein the linear movement assembly comprises a guide member, a slider slidably coupled to the guide member, the slider being coupled to the adjustable potentiometer; and the driving device is connected with the sliding block and used for driving the sliding block to move.

4. A movement mechanism for compensating for refractive error of an eye according to claim 3, wherein the guide mechanism is a linear guide rod.

5. The moving mechanism for compensating for refractive error of an eye according to claim 4, wherein a linear bearing is fixedly provided on the slider, and the linear bearing is slidably connected to the guide rod.

6. A displacement mechanism for compensating for refractive error of an eye according to claim 3, wherein the driving means comprises a driving motor and a rod-shaped member drivingly connected to the driving motor, the rod-shaped member being rotatable about its own axis, the rod-rotating member being provided with a spiral active surface, the slider sliding on the guide member under the drive of the spiral active surface as the rod-shaped member rotates.

7. The movement mechanism for compensating for ophthalmic refractive error of claim 6 wherein the rod-like member is a lead screw drivingly connected to the drive motor.

8. The movement mechanism for compensating for ophthalmic refractive error of claim 6 wherein the drive motor is a direct current gear motor.

9. A movement mechanism for compensating for refractive error of an eye according to claim 3, further comprising a base plate sliding potentiometer, a guide member, a slider and a driving means are provided on the base plate.

10. The movement mechanism for compensating for ophthalmic refractive error of claim 9 further comprising two mounting plates disposed opposite the base plate, the sliding potentiometer, guide member and slider being disposed between the two mounting plates.