Light shielding plate, light source light shielding mechanism and electronic endoscope

Abstract

The invention relates to the field of medical instruments, in particular to a shading plate, a light source shading mechanism and an electronic endoscope. The light shielding plate comprises a light shielding plate body, a light shielding opening groove is formed in the light shielding plate body, an opening in the middle of the light shielding opening groove is the largest, and openings in the two opposite sides are gradually narrowed in the direction away from the middle. The purpose of adjusting the light receiving intensity can be achieved through reciprocating motion of the shading plate body, instability caused by electronic control is avoided, the production efficiency is improved, the production difficulty is lowered, the product consistency is improved, the part machining difficulty is lowered, and the shading plate is stable in structure and suitable for large-range popularization.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a light-shielding plate, a light source light-shielding mechanism and an electronic endoscope. Background Art

[0002] An electronic endoscope is a medical electronic optical instrument integrating high-precision technologies such as optics, mechanics, and electronics, which can be inserted into the body cavities and internal organs of the human body for direct observation, diagnosis, and treatment. During the endoscope surgery process, the doctor controls the endoscope body to image the cavity. Since the imaging environment changes in real time, it will affect the stability of imaging. Therefore, in order to obtain an ideal and appropriate brightness image, it is necessary to adjust the light source.

[0003] In the prior art, some endoscope products adopt the method of setting a light-shielding sheet on the output optical path of a constant light source to adjust the output luminous flux of the light source, so as to adjust the illumination intensity of the endoscope imaging environment. However, among these endoscope products, the position of some light-shielding sheets can only be switched in a limited number of gears, and the luminous flux cannot be accurately adjusted. Some light-shielding sheet position adjustment algorithms are strongly dependent on the constant power of the light source. When the light source is used for a long time and generates a certain attenuation, the adjustment algorithm becomes inaccurate and the adjustment effect is not good.

[0004] Therefore, those skilled in the art are committed to developing a light-shielding plate, a light source light-shielding mechanism and an electronic endoscope that can be adjusted in real time and have high stability and accuracy. Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a light-shielding plate, a light source light-shielding mechanism and an electronic endoscope.

[0006] To achieve the above object, the present invention provides a light-shielding plate, including a light-shielding plate body, on which a light-shielding opening groove is provided. The middle opening of the light-shielding opening groove is the largest, and the openings on the opposite sides gradually narrow along the direction away from the middle. The light-shielding opening groove adjusts the light flux by its shape with a large middle and small ends in cooperation with the left-right reciprocating sliding.

[0007] Preferably, the light-shielding opening groove includes a first connecting section, a second connecting section, a third connecting section, a fourth connecting section, a fifth connecting section, a sixth connecting section, a seventh connecting section and an eighth connecting section connected end to end; the second connecting section and the third connecting section, the fourth connecting section and the fifth connecting section, and the eighth connecting section and the first connecting section are all connected by arc-shaped edges for transition. This design can effectively enhance the structural strength of the light-shielding plate body, reduce stress concentration, facilitate processing, and is also very beautiful.

[0008] The present invention also provides a light source light-shielding mechanism, which includes a light-shielding plate as described above, and further includes a mounting substrate, on which a light-emitting source is provided; the light-shielding plate body can control the output luminous flux of the light-emitting source through reciprocating sliding.

[0009] Preferably, a vertical plate is provided on the mounting substrate, at least one sliding rod is provided on the vertical plate, a slider is slidably fitted on the sliding rod, and the slider is fixedly connected to the light-shielding plate body. On the one hand, the slider provides an installation basis for the light-shielding plate body, and on the other hand, it can also drive the light-shielding plate body to move synchronously.

[0010] Preferably, a reciprocating driving mechanism is provided on the mounting substrate, and the reciprocating driving mechanism is used to drive the slider to perform linear reciprocating motion.

[0011] Preferably, the reciprocating driving mechanism includes a rotating disk, a connecting rod is rotatably fitted on the rotating disk, and one end of the connecting rod away from the rotating disk is hinged to the slider. When the rotating disk rotates, the connecting rod can drive the slider to perform linear reciprocating motion.

[0012] Preferably, a connecting rod seat is provided on the rotating disk, and a limiting convex rib protrudes from one side of the connecting rod seat close to the rotating disk; a corresponding limiting groove is provided on the rotating disk, and the limiting convex rib is engaged with the limiting groove. The engagement of the limiting convex rib and the limiting groove enables the connecting rod seat to only slide along the limiting groove, which not only plays a guiding role but also effectively prevents the connecting rod seat from flipping.

[0013] Preferably, at least one fixing seat is provided on the rotating disk, a screw rod is rotatably fitted on the fixing seat, and the screw rod is in threaded cooperation with the connecting rod seat; the axis of the screw rod intersects with the axis of the rotating disk. The distance between the connecting rod seat and the center of the rotating disk can be adjusted by rotating the screw rod, thereby controlling the linear motion distance of the slider. Specifically, the farther the distance between the connecting rod seat and the center of the rotating disk is, the longer the linear motion distance of the slider is; the closer the distance between the connecting rod seat and the center of the rotating disk is, the shorter the linear motion distance of the slider is.

[0014] Preferably, a motor is provided on the mounting substrate, and the output shaft of the motor is fixedly connected to the rotating disk. The motor provides a power source to drive the rotating disk to rotate.

[0015] The present invention also provides an electronic endoscope, which includes a light-shielding plate as described above or a light source light-shielding mechanism as described above.

[0016] The beneficial effects of the present invention are as follows: By the reciprocating motion of the light-shielding plate body, the purpose of adjusting the light-receiving intensity can be achieved, avoiding the instability of using electronic control, improving production efficiency, reducing production difficulty, improving product consistency, reducing the machining difficulty of parts, and having a stable structure, which is suitable for large-scale promotion. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the light-shielding plate body in a specific embodiment of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the light source light-shielding mechanism in a specific embodiment of the present invention.

[0019] Figure 3 It is an exploded schematic diagram of the rotating disk and the connecting rod seat in a specific embodiment of the present invention. Specific Embodiment

[0020] The present invention will be further described below in conjunction with the drawings and embodiments. It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific manner, so it cannot be understood as a limitation of the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] As Figure 1 shown, a light-shielding plate includes a light-shielding plate body 1. A light-shielding opening groove 11 is provided on the light-shielding plate body 1. The opening in the middle of the light-shielding opening groove 11 is the largest, and the openings on the opposite sides gradually narrow along the direction away from the middle. The light-shielding opening groove 11 cooperates with the left-right reciprocating sliding of the light-shielding plate body 1 through its shape with a large middle and small ends to adjust the light flux.

[0022] In this embodiment, the light-shielding opening groove 11 includes a first connecting section 111, a second connecting section 112, a third connecting section 113, a fourth connecting section 114, a fifth connecting section 115, a sixth connecting section 116, a seventh connecting section 117, and an eighth connecting section 118 that are connected end to end. The second connecting section 112 and the third connecting section 113, the fourth connecting section 114 and the fifth connecting section 115, and the eighth connecting section 118 and the first connecting section 111 are all connected by arc-shaped edges. This design can effectively enhance the structural strength of the light-shielding plate body 1, reduce stress concentration, facilitate processing, and is also very aesthetically pleasing.

[0023] As Figures 2-3 shown, the present invention also provides a light source light-shielding mechanism, which includes the light-shielding plate described above, and further includes a mounting substrate 2, and the mounting substrate 2 provides a mounting foundation. A light-emitting source 21 is provided on the mounting substrate 2, and the light-shielding plate body 1 can adjust the output light flux of the light-emitting source 21 by reciprocating left and right sliding.

[0024] A vertical plate 22 is provided beside the light source 21, and at least one sliding rod 23 is provided on the vertical plate 22. In this embodiment, two sliding rods 23 are provided, and the two sliding rods 23 are arranged in parallel. In other embodiments, other numbers of sliding rods 23 can be provided as needed. A slider 24 is slidably engaged with the sliding rod 23. The top of the slider 24 is fixedly connected to the bottom of the light-shielding plate body 1. While providing an installation basis for the light-shielding plate body 1, the slider 24 can also drive the light-shielding plate body 1 to move synchronously.

[0025] A reciprocating driving mechanism is provided on the installation substrate 2, and the reciprocating driving mechanism can drive the slider 24 to perform linear reciprocating motion. In this embodiment, the reciprocating driving mechanism is a crank-slider 24 mechanism, including a rotating disk 26. The rotating disk 26 serves as an installation basis, and two fixed seats 262 are provided thereon. In other embodiments, the fixed seat 262 can also be provided as at least one. A screw rod 263 is rotatably engaged with the fixed seat 262. The fixed seat 262 provides an installation basis for the screw rod 263. A connecting rod seat 264 is threadedly engaged with the screw rod 263, and the connecting seat 264 can move up and down along the screw rod 263 to adjust its position.

[0026] A limiting convex rib 264a protrudes from one side of the connecting rod seat 264 close to the rotating disk 26, and a corresponding limiting groove 26a is provided on the rotating disk 26. The limiting convex rib 264a is slidably engaged in the limiting groove 26a. By the mutual engagement of the limiting convex rib 264a and the limiting groove 26a, the connecting rod seat 264 can only slide within the limiting groove 26a, which not only plays a guiding role but also effectively prevents the connecting rod seat 264 from flipping.

[0027] A connecting rod 261 is rotatably engaged with the connecting rod seat 264, and one end of the connecting rod 261 away from the rotating disk 26 is hinged to the slider 24. The axis of the screw rod 263 intersects with the axis of the rotating disk 26. When in use, the position of the connecting rod seat 264 can be adjusted by rotating the screw rod 263, thereby controlling the linear motion distance of the slider 24. Specifically, the farther the distance between the connecting rod seat 264 and the center of the rotating disk 26, the longer the linear motion distance of the slider 24; the closer the distance between the connecting rod seat 264 and the center of the rotating disk 26, the shorter the linear motion distance of the slider 24.

[0028] The present invention also provides an electronic endoscope, including the light-shielding plate as described in any one of the above or the light source light-shielding mechanism as described in any one of the above.

[0029] When in use, start the motor 25 to drive the rotating disk 26 to rotate. The rotating disk 26 drives the connecting rod seat 264 to move. The connecting rod 261 rotatably engaged with the connecting rod seat 264 drives the slider 24 to perform linear reciprocating motion, and the slider 24 drives the light-shielding plate body 1 to move synchronously. By moving the light-shielding plate body 1, the present invention can achieve the purpose of adjusting the light flux of the light source 21, avoiding the instability of electronic control, improving production efficiency, reducing production difficulty, improving product consistency, reducing the machining difficulty of parts, and having a stable structure, which is suitable for wide promotion.

[0030] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. A sunshade, characterized in that: It comprises a shading plate body (1), on which a shading opening groove (11) is arranged, wherein the shading opening groove (11) has the largest opening in the middle, and openings on both sides thereof gradually narrow in a direction away from the middle.

2. The sunshade according to claim 1, wherein: The light-shielding opening groove (11) comprises a first connecting segment (111), a second connecting segment (112), a third connecting segment (113), a fourth connecting segment (114), a fifth connecting segment (115), a sixth connecting segment (116), a seventh connecting segment (117) and an eighth connecting segment (118) which are connected end to end; The second connecting section (112) and the third connecting section (113), the fourth connecting section (114) and the fifth connecting section (115), and the eighth connecting section (118) and the first connecting section (111) are all connected by arc-shaped edge transition.

3. A light source shading mechanism, comprising the shading plate according to any one of claims 1 to 2, characterized in that: It also comprises a mounting substrate (2), on which a light source (21) is provided; the light shielding plate body (1) can control the output light flux of the light source (21) by reciprocating sliding.

4. The light source shading mechanism according to claim 3, characterized in that: The mounting base plate (2) is provided with a vertical plate (22), the vertical plate (22) is provided with at least one sliding rod (23), the sliding rod (23) is slidably matched with a sliding block (24), and the sliding block (24) is fixedly connected to the sunshade body (1).

5. The light source shading mechanism according to claim 4, characterized in that: A reciprocating drive mechanism is provided on the mounting base plate (2), and the reciprocating drive mechanism is used to drive the slider (24) to perform linear reciprocating motion.

6. The light source shading mechanism according to claim 5, characterized in that: The reciprocating drive mechanism comprises a rotating disk (26), on which a connecting rod (261) is rotatably engaged, and one end of the connecting rod (261) away from the rotating disk (26) is hingedly connected to the slider (24).

7. The light source shading mechanism according to claim 6, characterized in that: The rotating disk (26) is provided with a connecting rod seat (264), and a limiting ridge (264a) is convexly provided on the side of the connecting rod seat (264) close to the rotating disk (26); a corresponding limiting groove (26a) is provided on the rotating disk (26), and the limiting ridge (264a) and the limiting groove (26a) are mutually engaged.

8. The light source shading mechanism according to claim 7, characterized in that: At least one fixed seat (262) is provided on the rotating disk (26), a screw rod (263) is rotatably engaged with the fixed seat (262), and the screw rod (263) is threadably engaged with the connecting rod seat (264); The axis of the screw (263) intersects with the axis of the rotating disk (26).

9. The light source shading mechanism according to claim 6, characterized in that: A motor (25) is provided on the mounting substrate (2), and an output shaft of the motor (25) is fixedly connected to the rotating disk (25).

10. An electronic endoscope, characterized in that: It comprises the shading plate as described in any one of claims 1-2 or the light source shading mechanism as described in any one of claims 3-9.

Images