Slit adjusting mechanism

Abstract

The utility model discloses a slit adjusting mechanism, and belongs to the technical field of slit-lamp microscopes. Comprising a fixed support, and a light hole is formed in the fixed support; the sliding adjusting mechanism is connected to one side of the fixed support in a sliding mode and comprises a first sliding seat, a second sliding seat and a driving assembly, and the driving assembly drives the first sliding seat and the second sliding seat to synchronously move in the direction away from or close to each other; and when the first sliding seat and the second sliding seat move from a direction far away from each other to a direction close to each other, the light hole is gradually shielded. The adjusting device is convenient to assemble and high in adjusting precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of slit lamp microscope, especially relates to a slit adjusting mechanism for slit lamp microscope. BACKGROUND

[0002] Slit lamp microscope is usually composed of an illumination system and a binocular microscope, which can adjust the focal point and the width of light source. The traditional slit lamp microscope forms an image of linear slit by using a projection lens group, and the conjugate image is located on the eye surface. The quality of linear light usually depends on the quality of slit and the complexity of projection lens group. Linear light can form an optical section similar to a section in the axial direction of its advance, so as to observe the internal structure of the object.

[0003] At present, the slit adjusting mechanism of slit lamp usually includes a support, a light transmission hole suitable for light passing through is arranged on the support, and a light knife embedded in the inner side of the support and movable relative to the support is arranged to change the size of the light transmission hole and realize slit adjustment. Since the light transmission hole is small, the assembly difficulty of the whole adjusting mechanism is large, and the adjustment accuracy is not easy to guarantee. SUMMARY

[0004] Therefore, the utility model provides a slit adjusting mechanism for slit lamp microscope which is easy to assemble and has high adjustment accuracy and a slit lamp optical path system.

[0005] In view of the above technical problems, the utility model provides the following technical scheme:

[0006] A slit adjusting mechanism comprises: a fixed support, the fixed support is provided with a light transmission hole; a sliding adjusting mechanism is slidably connected to one side of the fixed support, the sliding adjusting mechanism comprises a first sliding seat, a second sliding seat and a driving assembly for driving the first sliding seat and the second sliding seat to move in the direction away from or close to each other; when the first sliding seat and the second sliding seat move in the direction away from or close to each other, the light transmission hole is gradually shielded.

[0007] In some embodiments of the utility model, the fixed support is fixedly connected with a sliding rail extending in a first direction, and the first sliding seat and the second sliding seat are respectively provided with a sliding part matched with the sliding rail, and the sliding parts of the first sliding seat and the second sliding seat slide along the sliding rail under the driving action of the driving assembly.

[0008] In some embodiments of the utility model, the driving assembly comprises a driving motor, a driving seat connected to the output shaft of the driving motor and moving along a second direction, and a first connecting rod and a second connecting rod pivotally connected to the driving seat, one end of the first connecting rod is pivotally connected to the first sliding seat, and one end of the second connecting rod is pivotally connected to the second sliding seat, wherein the second direction is perpendicular to the first direction.

[0009] In some embodiments of the utility model, the driving seat comprises a first pivot, and the first end of the first connecting rod and the first end of the second connecting rod are sleeved on the first pivot; a second pivot is fixedly connected to the first sliding seat and the second sliding seat, and the second end of the first connecting rod and the second end of the second connecting rod are sleeved on the second pivot of the first sliding seat and the second pivot of the second sliding seat.

[0010] In some embodiments of the utility model, the distance between the first pivot and the second pivot of the first connecting rod is equal to the distance between the first pivot and the second pivot of the second connecting rod.

[0011] In some embodiments of the utility model, the driving motor is a rotary motor, the output shaft of the rotary motor is an externally threaded shaft, the driving seat comprises a threaded portion, and the threaded portion of the driving seat is threadedly connected to the output shaft of the rotary motor.

[0012] In some embodiments of the utility model, the opposite surfaces of the first sliding seat and the second sliding seat are respectively provided with at least one light shield plate, the opposite surfaces of the light shield plate of the first sliding seat and the light shield plate of the second sliding seat extend along the vertical direction, and when the first sliding seat and the second sliding seat move to the first position in the direction of approaching each other, the two light shield plates abut.

[0013] In some embodiments of the utility model, at least one light shield plate of the first sliding seat and at least one light shield plate of the second sliding seat abut the surface of the fixed support provided with the light transmission hole.

[0014] In some embodiments of the utility model, the position detection assembly for detecting the moving position of the first sliding seat or the second sliding seat comprises a position sensor mounted on the fixed support and a metal rod fixedly connected to the first sliding seat or the second sliding seat.

[0015] In some embodiments of the utility model, the position sensor is a potentiometer, and the metal rod abuts the resistor body of the potentiometer.

[0016] The technical scheme of the utility model has the following technical effects compared with the prior art:

[0017] The sliding adjustment mechanism for adjusting the width of the slit is located outside the fixed support, is convenient to install and fix, and has a large moving range, so that the position precision is easy to control. BRIEF DESCRIPTION OF DRAWINGS

[0018] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, which will help to understand the purpose and advantages of the utility model, wherein:

[0019] Figure 1 A schematic view of one specific embodiment of the slit adjustment mechanism provided by the utility model;

[0020] Figure 2 An exploded view of one specific embodiment of the slit adjustment mechanism provided by the utility model. DETAILED DESCRIPTION

[0021] The technical solutions of the utility model will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] In the description of the utility model, it should be noted that the directions or position relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are the directions or position relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the devices or elements indicated must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0025] For example, Figure 1、 Figure 2 The slit adjusting mechanism 100 provided by the utility model is suitable for slit lamp microscope, and is used for slit width adjustment of slit lamp microscope light source. The adjusting mechanism comprises a fixed support 10 and a sliding adjusting mechanism 20 which is slidingly connected to one side of the fixed support 10, wherein the fixed support 10 is provided with a light transmission hole 10a, the sliding adjusting mechanism 20 comprises a first sliding seat 21 and a second sliding seat 22 and a driving assembly which drives the first sliding seat 21 and the second sliding seat 22 to move synchronously; wherein the driving assembly can drive the first sliding seat 21 and the second sliding seat 22 to move synchronously in the direction of moving away from or approaching each other; when the first sliding seat 21 and the second sliding seat 22 move in the direction of approaching each other, the light transmission hole 10a is gradually shielded, so that the light transmission hole 10a forms a slit light transmission hole 10a area, and linear slit imaging of the slit lamp microscope is realized.

[0026] The sliding adjusting mechanism 20 is arranged outside the fixed support 10 in the slit adjusting mechanism 100, the width of the light transmission hole 10a is adjusted, the fixed support 10 is convenient to install and fix, and the moving range of the sliding adjusting mechanism 20 is large, so that the position precision is controlled.

[0027] Specifically, the fixed support 10 is integrally configured as a flat plate, the fixed support 10 is provided with the light transmission hole 10a which extends in the horizontal direction, in one specific embodiment, the slit adjusting mechanism 100 is installed on the light entrance side of the light transmission hole 10a.

[0028] Specifically, in an optional embodiment, in order to improve the sliding position precision of the first sliding seat 21 and the second sliding seat 22 relative to the fixed support 10, the fixed support 10 is fixedly connected with a sliding rail 11 which extends in the first direction (X direction in the figure). Figure 1 、 Figure 2 The first sliding seat 21 and the second sliding seat 22 are respectively provided with a sliding part which cooperates with the sliding rail 11, and the sliding parts of the first sliding seat 21 and the second sliding seat 22 slide along the sliding rail 11 under the driving action of the driving assembly. Figure 1 、 Figure 2 As shown in the figure, the first direction is the horizontal left-right direction, more specifically, the upper and lower sides of the fixed support 10 are respectively provided with a sliding rail 11 which extends in the horizontal direction, the sliding rail 11 is configured in the form of a sliding shaft, the upper and lower sides of the first sliding seat 21 and the second sliding seat 22 are respectively slidingly connected to the sliding rail 11 through a sliding bushing 23, and the sliding bushing 23 is interference-connected in the mounting hole of the first sliding seat 21 and the second sliding seat 22.

[0029] Specifically, in an alternative embodiment, the driving assembly comprises a driving motor 25, a driving base 26 connected to an output shaft of the driving motor 25 and moving along a second direction (Z direction in the figure), Figure 1 , Figure 2 , the first link 27 and the second link 28 are pivotally connected to the driving base 26, one end of the first link 27 is pivotally connected to the first sliding base 21, and one end of the second link 28 is pivotally connected to the second sliding base 22, wherein, as shown in the figure, Figure 1 , Figure 2 , the second direction is a vertical direction, the driving motor 25 drives the driving base 26 to move along the vertical direction, and the first link 27 and the second link 28 drive the first sliding base 21 and the second sliding base 22 to slide synchronously to realize the mutual approach or separation of the two.

[0030] Specifically, the driving base 26 further comprises a first pivot 261 extending along a third direction (Y direction in the figure), Figure 1 , Figure 2 , the first end of the first link 27 / the second link 28 is sleeved on the first pivot 261 respectively. The first sliding base 21 and the second sliding base 22 are fixedly connected with a second pivot 24, and the second end of the first link 27 / the second link 28 is sleeved on the second pivot 24 respectively. Wherein, the third direction is a horizontal front-back direction.

[0031] More specifically, the first sliding base 21 and the second sliding base 22 are respectively located on the left and right sides of the driving base 26, the distance between the two pivot parts of the first link 27 (between the first pivot 261 and the second pivot 24) is equal to the distance between the two pivot parts of the second link 28 (between the first pivot 261 and the second pivot 24), so that the sliding distance of the first sliding base 21 and the second sliding base 22 is equal, facilitating the adjustment control of the gap between the two.

[0032] Specifically, in an alternative embodiment, as shown in the figure, Figure 2 , the driving motor 25 is a rotary motor, the output shaft of the rotary motor is an external thread shaft 251, the driving base 26 comprises a screwing part 262, and the screwing part 262 of the driving base 26 is threadedly connected to the output shaft of the rotary motor. In another embodiment, the driving motor 25 is a linear motor, the output shaft of the linear motor extends along the vertical direction, and the driving base 26 is fixedly connected to the output shaft of the linear motor.

[0033] Specifically, in an optional embodiment, the opposite surfaces of the first sliding seat 21 and the second sliding seat 22 are respectively provided with at least one light shielding plate 211, 221, the opposite surfaces of the light shielding plate 211 of the first sliding seat 21 and the light shielding plate 221 of the second sliding seat 22 extend in the vertical direction, the area between the two light shielding plates 211, 221 cooperates with the light transmission hole 10a to form a light transmission gap, when the first sliding seat 21 and the second sliding seat 22 move to the first position in the direction of approaching each other, the two light shielding plates 211, 221 abut to completely shield the light transmission hole 10a, when the first sliding seat 21 and the second sliding seat 22 move in the direction of moving away from each other, the light transmission gap of the light transmission hole 10a gradually increases. The thickness of the light shielding plate 211, 221 is much smaller than the thickness of the first sliding seat 21 / the second sliding seat 22, which facilitates the precision control of the opposite surfaces of the light shielding plate 211, 221.

[0034] Specifically, in an optional embodiment, the first sliding seat 21 / the second sliding seat 22 is provided with two groups of light shielding plates 211, 221 in the third direction, the two groups of light shielding plates 211, 221 are arranged in parallel and spaced apart, and the light shielding plates 211, 221 close to the side of the light transmission hole 10a in the two groups of light shielding plates 211, 221 abut the surface of the fixed support 10.

[0035] The above-mentioned slit adjusting mechanism further comprises a position detection assembly 40 for detecting the moving position of the first sliding seat 21 or the second sliding seat 22, the position detection assembly 40 comprises a position sensor 41 mounted on the fixed support 10 and a metal rod 42 fixedly connected to the first sliding seat 21 or the second sliding seat 22. Specifically, as shown in Figure 1 、 Figure 2 The position sensor 41 is fixedly connected to the top of the fixed support 10, and its detection surface faces the top surface of the second sliding seat 22, and the position sensor is a potentiometer. The metal rod 42 fixedly connected to the top of the second sliding seat 22 abuts the resistance body of the potentiometer. When the metal rod 42 slides with the second sliding seat 22, it can slide to different positions of the resistance body of the potentiometer, thereby outputting different resistance values, and thereby reflecting the sliding position of the second sliding seat 22. The controller controls the action of the driving motor 25 according to the detection signal of the position sensor 41, so as to control the width between the two light shielding plates 211, 221, and realize stepless automatic adjustment of the width of the slit.

[0036] Obviously, the above embodiments are merely exemplary and not limiting. Based on the above description, one of ordinary skill in the art can make other different forms of changes or modifications. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A slit adjustment mechanism characterized by, The utility model relates to a kind of slit adjusting mechanism, including: Fixed support, the fixed support is equipped with light-transmitting hole; Sliding adjustment mechanism slidingly connected to one side of the fixed support, the sliding adjustment mechanism includes first sliding seat and second sliding seat and drive component that drives the first sliding seat and the second sliding seat synchronous to the direction of moving away from each other or close to each other; When the first sliding seat and the second sliding seat move from each other away to each other close direction, the light-transmitting hole is gradually shielded.

2. A slit adjustment mechanism according to claim 1, wherein The fixed support is fixedly connected with sliding rail extending along the first direction, the first sliding seat and the second sliding seat are respectively provided with sliding part matched with the sliding rail, and the sliding part of the first sliding seat and the second sliding seat slides along the sliding rail under the driving action of drive component.

3. A slit adjustment mechanism according to claim 2, wherein The drive component includes driving motor, drive seat connected to the output shaft of driving motor and moving along the second direction, and first connecting rod and second connecting rod pivotally connected to the drive seat, the other end of the first connecting rod is pivotally connected to the first sliding seat, and the other end of the second connecting rod is pivotally connected to the second sliding seat, wherein the second direction is perpendicular to the first direction.

4. A slit adjustment mechanism according to claim 3, wherein The drive seat includes first pivot, and the first end of the first connecting rod and the second connecting rod is respectively sleeved on the first pivot;The first sliding seat and the second sliding seat are fixedly connected with second pivot, and the second end of the first connecting rod and the second connecting rod is respectively sleeved on the second pivot of the first sliding seat and the second pivot of the second sliding seat.

5. A slit adjustment mechanism according to claim 4, wherein The distance between the first connecting rod and the second pivot is equal to the distance between the second connecting rod and the second pivot.

6. A slit adjustment mechanism according to claim 5, wherein The driving motor is a rotary motor, the output shaft of the rotary motor is an external thread shaft, the drive seat includes a threaded portion, and the threaded portion of the drive seat is threadedly connected to the output shaft of the rotary motor.

7. The slit adjustment mechanism of claim 1, wherein The opposite surfaces of the first sliding seat and the second sliding seat are respectively provided with at least one light shield plate, the opposite surfaces of the light shield plate of the first sliding seat and the light shield plate of the second sliding seat extend in the vertical direction, and the two light shield plates abut when the first sliding seat and the second sliding seat move to the first position in the direction close to each other.

8. A slit adjustment mechanism according to claim 7, wherein The at least one light shield plate of the first sliding seat and the at least one light shield plate of the second sliding seat abut the surface of the fixed support provided with the light-transmitting hole.

9. The slit adjustment mechanism of claim 1, wherein Further including position detection component for detecting the moving position of the first sliding seat or the second sliding seat, the position detection component includes position sensor installed on the fixed support and metal rod fixedly connected to the first sliding seat or the second sliding seat.

10. The slit adjusting mechanism according to claim 9, wherein The position sensor is a potentiometer, and the metal rod abuts on the resistance body of the potentiometer.

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