An ophthalmic ultrasound detection device

Abstract

The present invention relates to the field of ultrasonic detection equipment, and particularly relates to an ophthalmic ultrasonic detection device. It includes a housing, and the housing includes an outer shell and a probe head; a cavity is formed inside the outer shell, and the probe head is axially movably arranged in the cavity; a through hole through which the probe head can pass is provided at the front end of the outer shell. When the front end of the probe head is flush with the front end of the outer shell, there is a gap between the rear end of the probe head and the rear wall of the cavity; under the action of its own gravity, the front end of the probe head can extend out of the through hole; after the probe head extends out of the through hole and contacts the eye cornea, it can rely on the elastic force of the eye cornea to retract itself into the outer shell. In the above technical solution, under its own gravity, the probe head can naturally drop and extend out from the end of the outer shell. When subjected to a certain external force, the probe head can automatically retract. During ophthalmic examinations, when the probe head contacts the eye, it can automatically retract under the elastic force of the cornea; the probe head is hardly affected by pressure during use, reducing detection errors.

Description

Technical Field

[0001] The present invention relates to the field of ultrasonic detection equipment, and particularly to an ophthalmic ultrasonic detection device. Background Art

[0002] A-scan is short for A-mode ultrasound. It detects the echo of sound waves based on the relationship between the time and amplitude of the sound waves, and has relatively high positioning accuracy. Ophthalmic A-scan places the probe in front of the eye, and the sound beam propagates forward. Each time it encounters an interface, a reflection occurs. The echoes are arranged in the form of wave peaks on the baseline according to the return time. The height of the wave peak represents the echo intensity. The stronger the echo, the higher the wave peak, forming a one-dimensional linear image, with relatively high tissue discrimination ability. It can display the anterior chamber depth, lens thickness, vitreous cavity length, and axial length, with an accuracy of 0.01 mm, and is used for measuring the living structure of the eye.

[0003] Since 1956, there has always been a human error during the measurement process of A-scan, that is, the force applied by the operator holding the A-scan probe. If the force is too large, an artificial error of 1 to 2 mm may occur. Most of them are mainly due to the shortening of the eye axis. A 1-mm eye axis is equivalent to 300 degrees of refractive error.

[0004] In the aspect of preventing and controlling myopia in teenagers, the measurement of the eye axis is a relatively important link in the clinical diagnosis of myopia in ophthalmology. With a slight force from the operator's hand, a teenager with 300 degrees of myopia can be turned into a normal eye axis or an eye axis with hyperopia reserve.

[0005] For cataract patients, the appropriate intraocular lens power can be calculated by adding the eye axis and corneal curvature. Measuring the eye axis shorter will affect the visual effect of the patient after surgery.

[0006] Currently, the A-scan in ophthalmic A / B-scans on the market is still an integrated fixed probe, which has extremely strict requirements for the operator's technique. Errors often restrict the final effect and may also lead to the phenomenon of masking the condition. Summary of the Invention

[0007] In order to solve the above problems, the purpose of the present invention is to provide an ophthalmic ultrasonic detection device, which can minimize the unintentional human error to the greatest extent during ophthalmic A-scan detection, and greatly ensure the accuracy of the examination.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions: including a housing, characterized in that:

[0009] The housing includes an outer shell and a probe head;

[0010] A cavity is formed inside the outer shell, and the probe head can be axially movably arranged inside the cavity;

[0011] The front end of the shell is provided with a through hole for the probe part to pass through, and when the front end of the probe part is flush with the front end of the shell, there is a gap between the rear end of the probe part and the rear wall of the cavity;

[0012] The front end of the probe part can extend out of the through hole under the action of its own gravity; after the probe part extends out of the through hole and contacts the cornea of the eyeball, it can retract itself into the shell by relying on the elastic force of the cornea of the eyeball.

[0013] In the above technical solution, the probe part is able to move axially in the shell and is retractable relative to the shell; under the weight of the probe part itself, it can naturally fall and extend from the end of the shell, and when subjected to a certain external force, the probe part can automatically retract. During ophthalmic examination, when the probe part contacts the eye, it can automatically retract due to the elastic force of the cornea; therefore, the probe part is almost not affected by pressure when in use, thereby achieving zero negative pressure detection and reducing detection errors. In addition, when the user holds the device, the pressure acting on the device is absorbed by the outer layer of the shell, which has little effect on the probe part and accurate detection results.

[0014] Preferably, a guide rail layer is fixedly provided on the inner wall of the housing, a slide groove is provided on the guide rail layer, and a slide bar matching the slide groove is provided on the probe part. In this technical solution, the slide groove and the slide bar cooperate to enable the probe part to naturally slide down in accordance with the inner wall of the guide rail layer, thereby preventing the probe part from shaking in the housing; in addition, a space is left between the guide rail layer and the probe part to absorb pressure, thereby preventing the probe part from being squeezed.

[0015] Preferably, the housing further comprises a front / rear end plate fixedly arranged at both ends of the housing, a through hole is arranged on the front end plate, a rubber pad is circumferentially arranged on the inner wall of the through hole, and the gravity of the probe part is greater than the friction between the probe part and the rubber pad. In this technical solution, the provision of the rubber pad can prevent the front end plate from being worn due to long-term contact with the probe part, and also effectively prevent the front end of the probe part from shaking.

[0016] Preferably, the thickness of the front end plate is greater than the width of the gap. In this technical solution, the thickness of the front end plate is greater than the width of the gap so that the probe part can be located in the through hole of the front end plate when retracted into the shell, and prevent the probe part from sliding into the space between the guide rail layer and the probe part when retracted into the shell, and thus failing to be used normally.

[0017] Preferably, the probe part includes an ultrasonic probe, a solidified layer, and a slide bar. The solidified layer circumferentially covers the ultrasonic probe and exposes a section of its front end. There are multiple slide bars, which are regularly and fixedly arranged on the rear side wall of the solidified layer. Correspondingly, there are multiple slide grooves, which are regularly and circumferentially opened on the inner wall of the guide rail layer. On the guide rail layer, a protrusion is provided between two adjacent slide grooves to prevent the slide bar from rotating. In this technical solution, the solidified layer protects the ultrasonic probe, and the slide bar is arranged on the rear side of the solidified layer and can slide a certain distance. The slide bar is inserted into the slide groove and slides, which also effectively prevents the probe part from rotating circumferentially.

[0018] Preferably, a tension spring is provided at the rear end of the probe part, one end of which is connected to the slide bar and the other end is connected to the rear end plate; the tension of the tension spring is less than the gravity of the probe part. In this technical solution, the provision of the tension spring can make the probe part fall slowly, avoiding the probe part from falling too fast and frequently hitting the front end plate, and also preventing the probe part from falling too fast and causing damage to the eyes of the subject when used occasionally; furthermore, the tension spring is in a stretched state after the probe part extends out of the housing, and retracts more smoothly under the force of the tension spring after the ultrasonic probe touches the eye.

[0019] Preferably, a sponge pad is provided around the inner wall of the front end plate, and when the front end of the probe part extends out of the through hole by its own gravity, the slide bar abuts against the sponge pad. In this technical solution, the sponge pad is provided so that when the probe part extends out of the housing, the slide bar thereon abuts against the front end plate to play a buffering role, thereby preventing the slide bar from suddenly contacting the front end plate, and also allowing the probe to slowly extend out at the end.

[0020] Preferably, the detection device further comprises a dustproof ring, the inner wall of which is provided with a plurality of T-shaped slide bars, and the outer wall of the shell is provided with a T-shaped slide groove that matches the T-shaped slide bar. In this technical solution, when the detection device is not in use, since the ultrasonic probe is exposed from the shell when normally placed, the dustproof ring is arranged on the periphery of the exposed part to prevent dust from touching the probe and affecting the sensitivity; when in use, the dustproof ring can slide along the shell wall to expose the probe, and the T-shaped slide bar cooperates with the T-shaped slide groove to effectively prevent the dustproof ring from detaching from the shell wall.

[0021] Preferably, the inner wall of the dust ring is provided with an internal thread, and the outer wall of the housing is provided with an external thread engaged with the internal thread. In this technical solution, after the dust ring slides along the outer wall of the housing until the probe is exposed, the internal thread and the external thread cooperate to engage and lock the dust ring relative to the housing.

[0022] Preferably, the outer wall of the dustproof ring is provided with a plurality of concave areas suitable for the human finger pressure points, and the maximum concave width of the concave area is less than the wall thickness of the dustproof ring. In summary, the concave area provides a pressure point for the user. When the user is afraid of falling the detection device due to the smooth surface, he will hold it with a little force, and the finger falling on the concave area can reduce the pressure inspection of the device by the user, so that the probe is in a zero negative pressure state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the transverse cross-sectional structure of an ophthalmic ultrasonic detection device.

[0024] Figure 2 The figure is a schematic diagram of the end cross-sectional structure of an ophthalmic ultrasonic detection device.

[0025] Figure 3 The figure is a schematic diagram of the exploded structure of an ophthalmic ultrasonic detection device. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0029] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly defined or limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] As Figures 1-3 shown, an ophthalmic ultrasonic detection device for ultrasonic detection in ophthalmology includes a housing, and the housing includes an outer shell 1 and a probe head 2; a cavity is formed inside the outer shell 1, and the probe head 2 is axially movable and arranged inside the cavity; a through hole 3 through which the probe head 2 can pass is provided at the front end of the outer shell 1. When the front end of the probe head 2 is flush with the front end of the outer shell 1, there is a gap between the rear end of the probe head 2 and the rear wall of the cavity; under the action of its own gravity, the front end of the probe head 2 can extend out of the through hole 3; after the probe head 2 extends out of the through hole 3 and contacts the eyeball cornea, it can rely on the elastic force of the eyeball cornea to retract itself into the outer shell 1. In the above technical solution, the probe head 2 can axially move inside the outer shell 1 and has scalability relative to the outer shell 1; under the action of its own gravity, it can naturally drop and extend out from the end of the outer shell 1. When subjected to a certain external force, the probe head 2 can automatically retract. During ophthalmic examination, when the probe head 2 contacts the eye, it can automatically retract under the elastic force of the cornea; therefore, the probe head 2 is hardly affected by pressure during use, thus realizing zero negative pressure detection and reducing detection errors. In addition, when the user holds the device, the pressure acting on the device is absorbed by the outer layer of the housing, and the influence on the probe head 2 is small, ensuring accurate detection results.

[0032] Furthermore, a guide rail layer 4 is fixedly attached to the inner wall of the outer shell 1, a sliding groove 5 is provided on the guide rail layer 4, and a sliding bar 6 matching with the sliding groove 5 is provided on the probe head 2. In this technical solution, the cooperation between the sliding groove 5 and the sliding bar 6 enables the probe head 2 to naturally slide along the inner wall of the guide rail layer 4, preventing the probe head 2 from shaking inside the outer shell 1; in addition, a space is left between the guide rail layer 4 and the probe head 2 to absorb pressure and prevent the probe head 2 from being squeezed.

[0033] Furthermore, the housing further comprises front / rear end plates fixedly arranged at both ends of the housing 1, the through hole 3 is arranged on the front end plate 7, a rubber pad 8 is circumferentially arranged on the inner wall of the through hole 3, and the gravity of the probe part 2 is greater than the friction between the probe part 2 and the rubber pad 8. In this technical solution, the provision of the rubber pad 8 can prevent the front end plate 7 from being worn due to long-term contact with the probe part 2, and in addition, it can also effectively prevent the front end of the probe part 2 from shaking.

[0034] Furthermore, the thickness of the front end plate 7 is greater than the width of the gap 21. In this technical solution, the thickness of the front end plate 7 is greater than the width of the gap 21 so that the probe part 2 can be located in the through hole 3 of the front end plate 7 when it is retracted into the housing 1, and prevents the probe part 2 from sliding into the space between the guide rail layer 4 and the probe part 2 when it is retracted into the housing 1, and cannot be used normally.

[0035] Furthermore, the probe part 2 includes an ultrasonic probe 9, a solidified layer 10, and a slide bar 6. The solidified layer 10 circumferentially covers the ultrasonic probe 9 and exposes a section of its front end. There are multiple slide bars 6, which are regularly and fixedly arranged on the rear side wall of the solidified layer 10. Correspondingly, there are multiple slide grooves 5, which are regularly and circumferentially opened on the inner wall of the guide rail layer 4. On the guide rail layer 4, a protrusion 11 is provided between two adjacent slide grooves 5 to prevent the slide bar 6 from rotating. In this technical solution, the solidified layer 10 protects the ultrasonic probe 9, and the slide bar 6 is arranged on the rear side of the solidified layer 10 and can slide a certain distance. The slide bar 6 is inserted into the slide groove 5 and slides, which also effectively prevents the probe part 2 from rotating circumferentially.

[0036] Furthermore, a tension spring 12 is connected to the rear end of the probe part 2, one end of the tension spring 12 is connected to the slide bar 6, and the other end is connected to the rear end plate 13; the tension of the tension spring 12 is less than the gravity of the probe part 2. In this technical solution, the provision of the tension spring 12 can make the probe part 2 fall slowly, avoid the probe part 2 falling too fast and frequently hitting the front end plate, and also prevent the probe part 2 from falling too fast and causing damage to the eyes of the subject when used occasionally; moreover, the tension spring 12 is in a stretched state after the probe part 2 extends out of the housing 1, and retracts more smoothly under the force of the tension spring 12 after the ultrasonic probe 9 touches the eye.

[0037] Furthermore, a sponge pad 14 is provided on the inner wall of the front end plate 7 in the circumferential direction. When the front end of the probe part 2 extends out of the through hole 3 by its own gravity, the slide bar 6 abuts against the sponge pad 14. In this technical solution, the sponge pad 14 is provided so that when the probe part 2 extends out of the housing 1, the slide bar 6 thereon abuts against the front end plate 7 to play a buffering role, thereby preventing the slide bar 6 from suddenly contacting the front end plate 7, and also allowing the probe to be slowly extended at the end.

[0038] Furthermore, the detection device further includes a dust ring 15, on the inner wall of which a plurality of T-shaped slides 16 are provided, and on the outer wall of the housing 1 a T-shaped slide groove 17 is provided to match the T-shaped slides 16. In this technical solution, when the detection device is not in use, since the ultrasonic probe 9 is exposed from the housing 1 when normally placed, the dust ring 15 is arranged on the periphery of the exposed part to prevent dust from touching the probe and affecting the sensitivity; when in use, the dust ring 15 can slide along the housing wall to expose the probe, and the T-shaped slides 16 cooperate with the T-shaped slide grooves 17 to effectively prevent the dust ring 15 from being detached from the housing wall.

[0039] Furthermore, the inner wall of the dust ring 15 is provided with an internal thread 18, and the outer wall of the housing 1 is provided with an external thread 19 engaged with the internal thread 18. In this technical solution, after the dust ring 15 slides along the outer wall of the housing 1 until the probe is exposed, the internal thread 18 and the external thread 19 cooperate to engage and lock the dust ring 15 relative to the housing 1.

[0040] Furthermore, the outer wall of the dust ring 15 is provided with a plurality of recessed areas 20 suitable for the human finger pressure points, and the maximum recessed width of the recessed area 20 is less than the wall thickness of the dust ring 15. In summary, the recessed area 20 is to provide a pressure point for the user, and when the user is afraid of falling the detection device due to the smooth surface, he will hold it with a little force, and the finger falling on the recessed area 20 can reduce the pressure inspection of the device by the user, so that the probe is in a zero negative pressure state.

[0041] In this specific embodiment, when not in use, the detection device is placed vertically on the equipment, the probe part 2 naturally hangs down and extends out of the housing 1, the dust ring 15 slides to the T-shaped slide bar 16 against the front end plate 7, and the protruding part of the probe part 2 is covered, and a data line 22 is provided at the rear end of the ultrasonic probe 9 to connect with the equipment. When using this detection device to perform A-ultrasound detection on the eyes, the sliding dust ring 15 moves up to the internal thread 18 to be clamped on the external thread 19, exposing the front end of the ultrasonic probe 9, and the user holds the concave area 20 of the dust ring 15 to detect the eyes.

[0042] The device realizes that the probe part can be extended and retracted freely under its own gravity, and the pressure unintentionally applied by humans is controlled within a minimum range, thereby realizing almost zero negative pressure detection.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. An ophthalmic ultrasonic detection device, comprising a housing, characterized in that: The housing comprises an outer shell (1) and a probe portion (2); A cavity is formed in the shell (1), and the probe part (2) is axially movable and arranged in the cavity; The front end of the shell (1) is provided with a through hole (3) through which the probe part (2) can pass; when the front end of the probe part (2) is flush with the front end of the shell (1), a gap exists between the rear end of the probe part (2) and the rear wall of the cavity; The front end of the probe part (2) can extend out of the through hole (3) under the action of its own weight; after the probe part (2) extends out of the through hole (3) and contacts the cornea of the eyeball, it can retract itself into the housing (1) by relying on the elastic force of the cornea of the eyeball; A guide rail layer (4) is fixedly arranged on the inner wall of the housing (1), a slide groove (5) is arranged on the guide rail layer (4), and a slide bar (6) matching with the slide groove (5) is arranged on the probe part (2); The housing further comprises front / rear end plates fixedly arranged at both ends of the shell (1), the through hole (3) being arranged on the front end plate (7), a rubber pad (8) being circumferentially arranged on the inner wall of the through hole (3), and the gravity of the probe part (2) being greater than the friction force between the probe part (2) and the rubber pad (8); The probe part (2) comprises an ultrasonic probe (9), a solidifying layer (10) and a slide bar (6); the solidifying layer (10) circumferentially covers the ultrasonic probe (9) and exposes a section of its front end; there are a plurality of slide bars (6) which are regularly and fixedly arranged on the rear side wall of the solidifying layer (10); accordingly, there are a plurality of slide grooves (5) which are regularly and circumferentially opened on the inner wall of the guide rail layer (4); on the guide rail layer (4), a protrusion (11) is provided between two adjacent slide grooves (5) to prevent the slide bar (6) from rotating; The detection device further comprises a dustproof ring (15), a plurality of T-shaped slide bars (16) are arranged on the inner wall of the dustproof ring (15), and a T-shaped slide groove (17) matching with the T-shaped slide bars (16) is arranged on the outer wall of the housing (1); The inner wall of the dustproof ring (15) is provided with an internal thread (18), and the outer wall of the housing (1) is provided with an external thread (19) engaged with the internal thread (18); the outer wall of the dustproof ring (15) is provided with a plurality of recessed areas (20) suitable for the points of force applied by human fingers, and the maximum recessed width of the recessed areas (20) is less than the wall thickness of the dustproof ring (15).

2. An ophthalmic ultrasound detection device according to claim 1, characterized in that: The thickness of the front end plate (7) is greater than the width of the gap.

3. An ophthalmic ultrasonic detection device according to claim 1, characterized in that: A tension spring (12) is connected to the rear end of the probe part (2), one end of the tension spring (12) is connected to the slide bar (6), and the other end is connected to the rear end plate (13); the tension of the tension spring (12) is smaller than the gravity of the probe part (2).

4. An ophthalmic ultrasound detection device according to claim 1, characterized in that: A sponge pad (14) is provided on the inner wall of the front end plate (7) in the circumferential direction. When the front end of the probe part (2) extends out of the through hole (3) by its own gravity, the slide bar (6) abuts against the sponge pad (14).

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