TWI862387B - Handheld non-contact tonometer - Google Patents

Abstract

The invention relates a handheld non-contact tonometer, comprising a housing unit, an eye support unit, an operation unit, and an eye pressure detection module. The housing unit defines a containment space and is designed for user grip and operation. The eye support unit is disposed on the surface of the housing unit and is capable of linear movement relative to the housing unit, providing a comfortable fit for the user's eye socket. The operation unit is disposed on the surface of the housing unit in a location conducive to user operation and generates an operational signal when manipulated. The eye pressure detection module is disposed within the containment space and is connected to the operation unit. The eye pressure detection module receives the operational signal and measures the intraocular pressure of the eye under examination.

Description

Handheld non-contact tonometer

The present invention relates to a non-contact tonometer, and in particular to a handheld non-contact tonometer that is convenient for users to use for self-care at home.

As the population ages, eye care has become common knowledge for modern people. According to the World Health Organization, glaucoma among ophthalmic diseases ranks second in the world in terms of blindness rate. In addition, glaucoma is also the leading cause of irreversible blindness.

The eye relies on the aqueous humor in the eye to regulate the eye pressure. The aqueous humor is secreted by the ciliary body, flows from the posterior chamber of the eyeball to the anterior chamber, and then drains out of the eye. When the aqueous humor cannot drain smoothly, it will cause the eyeball pressure to increase, which will then compress the optic nerve, causing the optic nerve to gradually atrophy and the optic nerve fibers to gradually thin, resulting in the field of vision gradually shrinking from the outside to the inside, causing glaucoma. Generally, the healthy eyeball pressure ranges from 10mmHg to 21mmHg, and the range of change throughout the day is 2mmHg to 6mmHg.

As mentioned above, measuring intraocular pressure is an important factor in controlling the progression of glaucoma. However, in the past, tonometers were usually installed in hospitals or clinics, and users had to travel a long way and register and wait for the doctor to know the intraocular pressure value. Therefore, if users can use it for self-care at home, measuring intraocular pressure every day will help clinically monitor early glaucoma and effectively prevent deterioration.

Among the tonometers currently in use, the most widely used is the non-contact tonometer using air pressure. Most of the current air pressure tonometers use a solenoid cylinder to instantly push the gas to generate an air flow pulse and guide the air flow to the cornea to deform the cornea. In the process of changing the cornea from a normal convex surface to a concave state, the detector detects that the cornea reaches a flat state during the deformation process, measures the air pressure in the pressure chamber of the cylinder at this time, and calculates the measured intraocular pressure.

Unfortunately, the previous non-contact tonometers used bulky pumps, making them difficult for users to use for self-care at home.

In addition, because previous non-contact tonometers used a large, complex positioning unit with many parts, it was also difficult for users to use during self-care at home.

Therefore, a handheld non-contact tonometer that is smaller in size, lighter in weight, and can be easily used by users for self-care at home is needed in the current market.

In view of the above problems, there is a need for a smaller, lighter, and handheld non-contact tonometer that can be easily used by users for self-care at home. It will help users measure intraocular pressure in a timely manner to meet the needs of timely control of the progression of early glaucoma.

Therefore, the present invention provides a handheld non-contact tonometer, comprising a housing unit, an eye-support unit, an operating unit and an ocular pressure detection module. The housing unit defines a housing space around which a user holds the housing unit for operation. The eye-support unit is disposed on the surface of the housing unit, and the eye-support unit can move relative to the housing unit in a linear direction, and the eye-support unit provides at least one eye socket of the user for contact. The operating unit is disposed on the surface of the housing unit, and is located at a relative position for the user to hold the housing unit for easy operation, and the operating unit generates an operating signal when operated. The intraocular pressure detection module is disposed in the accommodation space and connected to the operating unit. The intraocular pressure detection module receives the operating signal and measures the intraocular pressure value of an eye to be tested in at least one of the eye sockets.

In summary, the present invention simplifies the design of the intraocular pressure detection module to achieve a smaller size and lighter weight, which can be easily used by users for self-care at home, helping users to measure intraocular pressure in time to control the progression of early glaucoma.

100:Handheld non-contact tonometer

110: Shell unit

111: Storage space

112: PTZ hole

113:Handle strap

120: Eye support unit

121: Subject

122: Installation Department

123: Eyelid support

124: First thread

125: Second thread

130: Operation unit

131:Key

140: Intraocular pressure detection module

141:Jet unit

142: Linear position detection unit

143: Intraocular pressure detection unit

144: Processing unit

145: Prompt unit

146: Air jet

147: Pump

1470: Gas output terminal

1471: Shell

1472: Gas cylinders

1473: Coil set

1474: Iron Block

1475:Putter

1476: Piston

1477:Baffle

1478: Iron

1479: Spring

1480: Cavity

1481: Wire rack

1482: Coil

1483: Perforation

1484: Block iron perforation

1485: Air chamber

1486: Baffle perforation

149: Jet pipe

150: Plane position prompt unit

151: Focus pattern

152: Alignment position

160: Speaker

170: Diopter compensation unit

171:Diopter compensation lenses

180: Left/right eye detection unit

190: Display screen

191: Wireless unit

192: Power detection unit

193: Air pressure detection unit

194: Screen menu button

200: User

210: Eye to be tested

211: Cornea

S101 to S120: Process steps

Figure 1 is a three-dimensional schematic diagram of the appearance of the present invention; Figure 2 is a bottom view of the present invention; Figure 3 is a cross-sectional view of the present invention; Figure 4 is a cross-sectional schematic diagram of an eye support unit of the present invention; Figure 5 is a cross-sectional schematic diagram of a pump of the present invention; Figure 6 is a schematic diagram of a plane position prompt unit of an intraocular pressure detection module of the present invention; Figure 7 is a schematic diagram of a linear position detection unit of the intraocular pressure detection module of the present invention; Figure 8 is a schematic diagram of the plane position prompt unit of the present invention; Figure 9 is a schematic diagram of a diopter compensation unit of the present invention; Figure 10 is a schematic diagram of measuring intraocular pressure of the present invention; Figure 11 is a block schematic diagram of the present invention; Figure 12 is a flow diagram of the present invention; and Figure 13 is a three-dimensional schematic diagram of the appearance of other embodiments of the present invention.

The present invention is further described in detail below in conjunction with the drawings and embodiments. It is understood that the specific embodiments described here are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, the drawings only show the parts related to the present invention rather than the entire structure.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integrated connection; it can be mechanical connection, electrical connection, or signal connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For those with ordinary knowledge in this field, the specific meanings of the above terms in the present invention can be understood specifically and without ambiguity.

In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

Referring to FIG. 1 and FIG. 11 , in some embodiments, the present invention provides a handheld non-contact tonometer 100, comprising a housing unit 110, an eye support unit 120, an operation unit 130, and an ocular pressure detection module 140. The housing unit 110 defines a surrounding space 111, and the housing unit 110 is used for a user 200 to hold and operate. The eye support unit 120 is disposed on the surface of the housing unit 110, and the eye support unit 120 can move relative to the housing unit 110 in a linear direction, and the eye support unit 120 provides at least one eye socket of the user 200 for contact. The linear direction can be any axis of the rectangular coordinate system. In the present invention, the Z axis direction is used as the linear direction. The operating unit 130 is arranged on the surface of the housing unit 110, and is located at a relative position for the user 200 to hold the housing unit 110 for easy operation. The operating unit 130 is operated to generate an operating signal. The intraocular pressure detection module 140 is arranged in the accommodating space 111 and connected to the operating unit 130. The intraocular pressure detection module 140 receives the operating signal and measures the intraocular pressure value of a test eye 210 in at least one of the eye sockets.

As can be seen from the above, the effect of the present invention is that by simplifying the design of the intraocular pressure detection module 140, the effect of small size and light weight is achieved, and the appearance is light and easy to hold, so that the handheld non-contact tonometer 100 of the present invention can be easily used by the user 200 for self-care at home, helping the user to measure the intraocular pressure value in time to control the progression of early glaucoma.

Referring to FIG. 2 and FIG. 3 , in some embodiments, the eye support unit 120 includes a main body 121, a mounting portion 122 and an eye support portion 123. The mounting portion 122 is disposed on the shell unit 110. The main body 121 is adjustably disposed at a relative position of the shell unit 110 along a linear direction through the mounting portion 122. The eye support portion 123 is formed at one end of the main body 121, and the eye support portion 123 is used to support at least one eye socket of the user 200. To further explain, the eye support 123 is used to support the periorbital area of the left eye of the user 200 alone, or the eye support 123 is used to support the periorbital area of the right eye of the user 200 alone, or the eye support 123 is used to support the periorbital area of both eyes of the user 200 for measurement.

Referring to FIG. 4 , in some embodiments, the mounting portion 122 is a sleeve fixedly mounted on one end of the shell unit 110 and has a first thread 124. The main body 121 is a hollow tube and has a second thread 125 disposed at a position relative to the mounting portion 122. The first thread 124 and the second thread 125 are threadedly connected to each other. Thus, the displacement stroke of the eye support unit 120 is the displacement stroke of the first thread 124 and the second thread 125 being threadedly connected to each other. In this way, different users 200 can adjust the appropriate linear position of the main body 121 in the housing unit 110 according to the difference in their own eye socket depths, so that the eye 210 to be tested of the user 200 and the handheld non-contact tonometer 100 are located at the best measurement distance. In addition, since the second thread 125 is engaged with the first thread 124, the linear position of the eye support unit 120 extending out of the housing unit 110 can be changed by rotation, and when the eye support unit 120 is subjected to pressure during measurement, the linear position of the eye support unit 120 will not be affected by pressure and changed. It is worth mentioning that the connection between the main body 121 and the mounting portion 122 can also be a connection other than a threaded connection. Any connection method that can achieve linear displacement and does not change the linear position after the eye support portion 123 is attached to the eye socket is within the scope of the present invention.

3 and 5, in some embodiments, the intraocular pressure detection module 140 includes an air jet unit 141, a linear position detection unit 142, an intraocular pressure detection unit 143, a processing unit 144, and a prompt unit 145. The air jet unit 141 is disposed in the accommodating space 111, and the air jet unit 141 is provided with an air jet hole 146, and is connected to the eye support unit 120. Specifically, the axes of the main body 121, the mounting portion 122, and the air jet hole 146 are on the same axis in the linear direction. The air jet unit 141 receives an air jet signal to output gas from the air jet hole 146. The gas is jetted toward the eye support unit 120 to act on the cornea 211 of the eye to be tested 210 attached to the eye support unit 120. The linear position detection unit 142 is disposed in the accommodating space 111. The linear position detection unit 142 detects the position of the cornea 211 of the eye to be tested 210 to generate a linear direction detection signal. The intraocular pressure detection unit 143 is disposed in the accommodating space 111, and detects the squeezed state of the cornea 211 of the eye to be tested 210 formed by the squeezing of the gas, and generates an intraocular pressure signal according to the squeezed state.

Furthermore, the processing unit 144 is disposed in the housing unit 110 and is signal-connected to the air jet unit 141, the operating unit 130, the linear position detection unit 142 and the intraocular pressure detection unit 143. The processing unit 144 receives the linear direction detection signal and generates and outputs a prompt signal when the linear direction detection signal meets a detection condition. The processing unit 144 receives the operating signal to generate and output the air jet signal. The processing unit 144 receives the intraocular pressure signal and calculates the intraocular pressure value of the eye to be tested 210 according to the intraocular pressure signal. The prompt unit 145 is disposed in the housing unit 110 and is signal-connected to the processing unit 144 to receive the prompt signal and output a prompt output information according to the prompt signal.

From the above, it can be seen that the effect of the present invention is that the handheld non-contact tonometer 100 of the present invention can be easily used by the user 200 for self-care at home.

7 , in some embodiments, the detection condition is that the cornea 211 of the eye to be tested 210 is located at the linear detection position of the intraocular pressure detection unit 143. The linear position detection unit 142 includes a set of infrared light sources 1421 and a set of sensors 1422. The set of infrared light sources 1421 usually has two infrared light sources, and one infrared light source is set at each opposite position (e.g., left and right) relative to the cornea 211. The set of sensors 1422 may also have two sensors, which are set corresponding to the set of infrared light sources 1421. The set of infrared light edges 1421 and the set of sensors 1422 may also have other numbers of infrared light sources and sensors, such as three, four, etc., which can achieve the purpose of the present invention. The infrared light source 1421 emits infrared light to the cornea 211 of the eye 210 to be tested, and the sensor 1422 receives the reflected light and generates the linear direction detection signal. To be more specific, when the cornea 211 of the eye 210 to be tested is located within the correct linear position range, the infrared light will be reflected by the cornea 211 to the sensor 1422 in sufficient quantity. By measuring the magnitude of the reflected light by the sensor 1422, it can be confirmed whether the eye 210 to be tested is located at the correct linear detection position. It is worth mentioning that the linear position detection unit 142 can also use a Quad-cell aligner, a PSD (Position-sensitive Diode) aligner, etc. to determine the linear position of the eye to be tested. Other linear position detection methods are not described in detail. Those that can be reasonably inferred by a person with ordinary knowledge in the field based on the content disclosed in the present invention are all within the scope of the patent application of the present invention.

Referring to FIG. 3 , in some embodiments, the gas injection unit 141 includes a pump 147 and a gas injection pipe 149. The pump 147 is disposed in the accommodation space 111 and is used to generate the gas. One end of the gas injection pipe 149 is connected to a gas output end 1470 of the pump 147, and the other end of the gas injection pipe 149 is connected to the gas injection hole 146.

5 , in some embodiments, the pump 147 of the jet unit 141 is an electromagnetic pump, having a housing 1471, a gas cylinder 1472, a coil assembly 1473, a baffle 1474, a push rod 1475, a piston 1476, a baffle 1477, a stopper 1478, and a spring 1479. A cavity 1480 is provided between the two ends of the gas cylinder 1472, and the gas cylinder 1472 is provided with the gas output end 1470, and the cavity 1480 is communicated with the gas output end 1470. The coil assembly 1473 has a wire frame 1481 and a coil 1482. The coil 1482 is arranged around the wire frame 1481. The wire frame 1481 has a through hole 1483. The iron stop 1474 is arranged in the through hole 1483. The iron stop 1474 has an iron stop through hole 1484. The push rod 1475 is arranged in the through hole 1483, and one end of the push rod 1475 passes through the iron stop through hole 1484.

According to the above, the piston 1476 is plugged into a portion of the cavity 1480, so that another portion of the cavity 1480 forms an air chamber 1485, and one end of the piston 1476 is connected to another portion of the push rod 1475. The baffle 1477 is disposed at an end of the housing 1471 away from the piston 1476, and the baffle 1477 is provided with a baffle through hole 1486 at a position relative to the through hole 1483. The tie iron 1478 passes through the baffle through hole 1486 and is connected to one end of the push rod 1475. The spring 1479 is sleeved around the tab 1478, and one end of the spring 1479 abuts against one end of the tab 1478, and the other end of the spring 1479 abuts against the baffle 1477. The processing unit 144 is connected to the coil 1482, and the processing unit 144 controls the excitation of the coil 1482 to drive the tab 1478 to move toward the baffle 1474, so that the piston 1476 sprays the air in the air chamber 1485 to the cornea 211 of the eye 210 to be tested through the spray pipe 149.

In some embodiments, the number of turns of the coil 1482 ranges from 700 turns to 1000 turns. In some embodiments, the angle of the coupling between the strap 1478 and the baffle 1474 ranges from 60 degrees to 90 degrees. Through finite element simulation, the miniaturized pump 147 with optimal energy efficiency can be designed according to the angle of the strap 1478 and the number of turns of the coil 1482 to reduce the weight and size of the pump 147. In addition, in conjunction with the electronic drive circuit, a gas pressure curve that can be used to measure intraocular pressure is adjusted.

In some embodiments, the materials of the baffle 1474, the bracket 1478, and the outer shell 1471 are low-carbon steel, the wire frame 1481 and the push rod 1475 are non-magnetic conductive materials, the coil 1482 is copper, and the piston 1476 is plastic.

As can be seen from the above, due to the simple design of the pump 147, which replaces the large and heavy pump of the prior art, the handheld non-contact tonometer 100 of the present invention can be easily used by the user 200 for self-care at home. In particular, when the number of turns of the coil 1482 and the matching angles of the tie iron 1478 and the baffle iron 1474 are as described above, the air in the air chamber 1485 can be effectively ejected through the air pipe 149 in a small volume, thereby achieving the purpose of the present invention.

With reference to FIG. 6 and FIG. 8 , in some embodiments, the intraocular pressure detection module 140 further includes a plane position prompt unit 150, which is disposed in the accommodation space 111 of the housing unit 110. The plane position prompt unit 150 displays a focus pattern 151. When the focus pattern 151 is located at an alignment position 152 when the eye 210 to be tested observes the focus pattern 151 from the air jet 146, it indicates that the cornea 211 of the eye 210 to be tested is located at the correct plane position. The plane position can be a plane formed by any two axes of the rectangular coordinate system. In the present invention, the Z axis direction is taken as the linear direction. The plane in the plane position of the present invention is a plane formed by the X axis and the Y axis direction in the Z axis direction.

To further explain, the alignment position 152 is the alignment of the center position of the focusing pattern 151 with the center position of the air hole 146. The focusing pattern 151 can be a double concentric circle, and the handheld non-contact tonometer 100 moves up and down and left and right on the plane relative to the eye to be tested 210, so that the eye to be tested 210 observes that the focusing pattern 151 is aligned, and the relative position at this time is maintained.

It is worth mentioning that the focus pattern 151 can also be designed so that the user's eye to be tested observes the complete focus pattern 151 from the air hole 146 and the periphery of the focus pattern 151 overlaps with the hole edge of the air hole 146, which means that the cornea 211 of the eye to be tested 210 is located in the correct plane position. Furthermore, the linear direction referred to in the present invention is the axial direction of the air hole 146, and the plane position is the plane formed by two different linear directions orthogonal to the axial direction of the air hole 146. For example, when the linear direction is the Z-axis direction of the rectangular coordinate system, the plane position is the plane formed by the X-axis and Y-axis directions in the Z-axis direction.

In some embodiments, the prompt output information of the prompt unit 145 is a light signal. When the linear direction detection signal meets the detection condition, the prompt output information is a light signal displayed in front of the eye to be tested 210. When it is detected that the eye to be tested 210 is not located in the correct linear position range, the eye to be tested 210 sees a red light. When it is located in the correct linear position range, the eye to be tested 210 sees a green light. The color of the light signal can also be other colors or states, such as flashing twice quickly to indicate that the eye has reached the correct linear position range. Those that can be reasonably inferred by a person with ordinary knowledge in the art based on the contents disclosed in this specification are all within the scope of the patent application of the present invention. It is worth mentioning that the prompt output information may also include a sound signal. When the linear direction detection signal meets the detection condition, the prompt output information is a correct sound signal emitted through a speaker 160.

9, in some embodiments, the intraocular pressure detection module 140 further includes a diopter compensation unit 170, which is disposed in the accommodating space 111 between the air jet 146 and the plane position prompt unit 150, and the diopter compensation unit 170 moves along the same linear direction as the linear position detection unit 142. To be more specific, the diopter compensation unit 170 compensates for myopia, hyperopia, etc. of the eye to be tested 210 by linearly moving a diopter compensation lens 171. In FIG. 7 , from top to bottom, the diopter compensation unit 170 compensates for the hyperopia, normal vision, and myopia of the eye to be tested.

Referring to FIG. 1 , in some embodiments, the operation unit 130 is a button 131. When the eye to be tested 210 sees the prompt output information, that is, when the red light turns to green light, the user 200 can press the button 131 to measure the intraocular pressure. When the button 131 is pressed, the prompt output information can be a sound signal emitted through the speaker 160. It is worth mentioning that in addition to the aforementioned manual measurement mode, the present invention can also be set to an automatic measurement mode. When the linear direction detection signal meets the detection condition, the intraocular pressure is automatically measured, and when the automatic measurement starts, the prompt output information is a sound signal emitted through the speaker 160.

In some embodiments, a left/right eye detection unit 180 is further included, which is disposed at a position of the eye support unit 120 relative to the nose bridge of the user 200, and generates a left eye detection signal or a right eye detection signal to the processing unit 144. The processing unit 144 determines whether the eye support unit 120 is relative to the left eye socket or the right eye socket of the user 200 according to the left eye detection signal and the right eye detection signal.

In some embodiments, the left/right eye detection unit 180 includes a first capacitance detector and a second capacitance detector. The first capacitance detector is disposed at the eye support portion 123 of the eye support unit 120 on the left side relative to the nose bridge of the user 200, and is used to generate the left eye detection signal. The second capacitance detector is disposed at the eye support portion 123 of the eye support unit 120 on the right side relative to the nose bridge of the user 200, and is used to generate the right eye detection signal. When the capacitance sensed by the first capacitor is greater than the capacitance sensed by the second capacitance detector, it indicates that the eye support unit 120 is relative to the left eye socket or the right eye socket of the user 200. Conversely, when the capacitance sensed by the second capacitor is greater than the capacitance sensed by the first capacitance detector, it indicates that the eye support unit 120 is relative to the left eye socket or the right eye socket of the user 200. Thus, it can be determined whether the eye to be tested 210 is the left eye or the right eye.

It is worth mentioning that the left/right eye detection unit 180 may also include a distance detector, which is used to generate the left eye detection signal or the right eye detection signal. For example, time of flight (ToF) ranging, ultrasonic ranging, etc. When the eye support unit 120 is relative to the left eye socket of the user 200, it can be measured that the distance between the eye support unit 120 and the left side of the nose bridge of the user 200 is shorter. On the contrary, when the eye support unit 120 is relative to the right eye socket of the user 200, it can be measured that the distance between the eye support unit 120 and the right side of the nose bridge of the user 200 is shorter, thereby determining whether the eye to be tested 210 is the left eye or the right eye.

It is also explained that when the present invention is designed to measure the left eye or the right eye by flipping 180 degrees, the left/right eye detection unit 180 is a flip detector, which is used to generate the left eye detection signal or the right eye detection signal. The flip detector can be a three-axis accelerometer or a gyroscope, which is used to sense the flip direction of the housing unit 110 and determine whether the eye to be tested is the left eye or the right eye.

Referring to FIG. 10 , the processing unit 144 receives the intraocular pressure signal (dashed line in FIG. 10 ). The processing unit 144 receives the air pressure value of the air chamber 1485 in the air cylinder 1472 through an air pressure detection unit 193 . When the intraocular pressure signal reaches a peak, the air pressure value of the air chamber 1485 (solid line in FIG. 10 ) is in a certain relative relationship with the intraocular pressure value. This is a well-known concept in the field of non-contact tonometers and will not be elaborated here.

Referring to FIG. 2 , in some embodiments, the handheld non-contact tonometer 100 of the present invention further includes a pan/tilt hole 112 disposed on the surface of the housing unit 110 , so that the present invention can also be combined with a tripod and a support base to facilitate placement on a table for use, thereby increasing the stability of the present invention, and is particularly suitable for use by the elderly or users with poor hand muscle stability.

Referring to FIG. 1 , in some embodiments, the handheld non-contact tonometer 100 of the present invention further includes a hand strap 113 disposed on the surface of the housing unit 110 to increase the stability of the present invention on the hand of the user 200 when in use.

Referring to FIG. 2 , in some embodiments, the handheld non-contact tonometer 100 of the present invention may also include a display screen 190 for displaying the measured intraocular pressure, so that the user 200 can obtain the intraocular pressure value through the display screen 190 after measuring the intraocular pressure. The display screen 190 is equipped with a set of screen menu buttons 194 so that the user 200 can view the display screen 190 and set the function through the set of screen menu buttons 194 at the same time. In consideration of the fact that the user 200 may accidentally touch the set of screen menu buttons 194 with his fingers when measuring intraocular pressure by hand, the function of the set of screen menu buttons 194 being ineffective during intraocular pressure measurement is designed in the process.

It is worth mentioning that the present invention can also be connected to a mobile phone or computer through a wireless unit 191 via Bluetooth or other means to transmit the measured intraocular pressure to an external device such as a mobile phone or computer, so that the user can record the intraocular pressure value. In addition, the present invention can also be connected to a medical institution so that the medical team can grasp the user's intraocular pressure value in time, which helps the medical team to remind the user to return for a visit or receive treatment. In addition, the present invention can also include a power detection unit 192 for displaying the remaining power.

With reference to Figure 12, the process of the present invention is as follows:

1. After the user 200 presses the button 131, the intraocular pressure measurement preparation process (S101) is started.

2. After the preparation process starts, the plane position prompt unit 150 of the intraocular pressure detection module 140 projects the focus pattern 151, and the user 200 observes the focus pattern 151 through the air hole 146.

3. The user 200 can set the position of the diopter compensation lens 171 in the diopter compensation unit 170 according to his/her own diopter, so that when the user 200 is in the correct linear position range, the focus pattern 151 seen by the user 200 is the clearest.

4. The diopter compensation unit 170 can also provide the user 200 with different diopters with the same image size, so as to facilitate the confirmation that the focus pattern 151 is located at the alignment position 152.

5. When the user 200 sees the focusing pattern 151 in the air hole 146 and it is located in the center of the air hole 146, it is determined that the center of the eye to be tested 210 is in the correct position on the plane.

6. The infrared light source 1421 of the linear position detection unit 142 emits infrared light, and the sensor 1422 detects the reflected light from the cornea 211 of the eye to be tested 210 (S102), generating the linear direction detection signal. At this time, the linear direction detection signal is the light intensity of the reflected light. The processing unit 144 receives the linear direction detection signal (S103). When the light intensity reflected from the eye to be tested 210 meets the detection condition, the processing unit 144 determines that the eye to be tested 210 is located in the correct linear position range, so as to generate and output the prompt signal to the prompt unit 145. It should be noted that the light intensity reflected by the eye to be tested 210 meets the detection condition, which means that when the cornea 211 of the eye to be tested 210 is located at the linear detection position of the intraocular pressure detection unit 143, the light intensity reflected by the eye to be tested 210 meets the preset light intensity threshold.

7. The prompt unit 145 receives the prompt signal from the processing unit 144, and the prompt unit 145 outputs a prompt output information (S104), such as a green light, according to the prompt signal, to inform the user 200 that the eye to be tested 210 is already in the correct linear position range. The processing unit 144 determines whether the eye to be tested 210 of the user 200 is in the correct position (S105). For example, when the user 200 is not in the correct linear position range, the light signal may be a red light. When the user 200 linearly moves to the correct linear position range, the light signal is displayed as a green light, so that the user 200 can press the button 131 within the correct linear position range to measure the intraocular pressure. The present invention can also be set to an automatic measurement mode (S106), and when the automatic measurement starts, the processing unit 144 causes the prompt output information to be an audible signal through the speaker 160 (S107).

8. When the present invention is in manual measurement mode, the user 200 determines whether to press the button 131 (S108). After the user 200 presses the button 131, the operation signal is generated, and the intraocular pressure detection unit 143 starts the intraocular pressure measurement process.

9. When the intraocular pressure measurement process starts, the processing unit 144 receives the operation signal to generate and output the gas injection signal, turns on the electromagnetic valve switch of the pump, pushes the piston 1476 through the gas injection hole 146, and applies the gas pressure to the eye to be tested 210 (S109).

10. The intraocular pressure detection unit 143 detects the squeezed state of the cornea 211 of the eye to be tested 210 squeezed by the gas, and generates the intraocular pressure signal according to the squeezed state (S110). At this time, the processing unit 144 simultaneously records the intraocular pressure signal and the air pressure value in the air chamber 1485 of the gas cylinder 1472 (S111).

11. The processing unit 144 determines whether the intraocular pressure signal has a peak value (S112). When the processing unit 144 determines that the intraocular pressure signal has a peak value, the cornea 211 of the eye to be tested 210 is in a flattened state.

12. When the cornea 211 of the eye 210 to be tested is flattened, the air pressure value in the air chamber 1485 and the intraocular pressure value are in a certain relative relationship.

13. The processing unit 144 calculates the air pressure value in the air chamber 1485 to obtain the intraocular pressure value of the eye to be tested 210 (S113).

14. When the intraocular pressure measurement process is completed, the processing unit 144 notifies the user of the completion of the intraocular pressure measurement process through the light or sound signal of the prompt unit 145 (S114).

15. When the intraocular pressure measurement process is completed, the left/right eye detection unit 180 confirms that the eye to be tested 210 currently being measured is the left or right eye (S115).

16. If the left/right eye detection unit 180 cannot determine whether the measurement is for the left eye or the right eye, the user 200 is notified to input on the display screen 190 (S116).

17. When the entire measurement process is completed, the present invention displays the intraocular pressure value on the display screen 190 and saves the measurement value (S117).

18. The processing unit 144 determines whether it is connected to an external device (S118). If it is wirelessly connected to an external device through the wireless unit 191, the measured intraocular pressure value can be transmitted to the external device for recording (S119), and the measurement is terminated (S120). When the processing unit 144 determines that it is not connected to an external device, the measurement is also terminated (S120).

With reference to FIG. 13 , in other embodiments of the present invention, the handheld non-contact tonometer 100 can also be in the form shown in FIG. 13 , which is roughly the same as the embodiment shown in FIG. 1 , and the similarities are not repeated here. The changes, such as: placing the display screen 190 on the side of the housing unit 110 ; or using a light hand strap 113 , etc., can also achieve the purpose of the present invention.

The above is only an example to illustrate the preferred implementation of the present invention, and is not intended to limit the scope of implementation. All simple substitutions and equivalent changes made according to the scope of the patent application of the present invention and the content of the patent specification are within the scope of the patent application of the present invention.

100:Handheld non-contact tonometer

110: Shell unit

113:Handle strap

120: Eye support unit

121: Subject

122: Installation Department

123: Eyelid support

130: Operation unit

131:Key

Claims (20)

A handheld non-contact tonometer comprises: a housing unit, which surrounds and defines a containing space, and the housing unit is used for a user to hold and operate; an eye support unit, which is arranged on the surface of the housing unit and can move relative to the housing unit in a linear direction, and the eye support unit provides at least one eye socket of the user to abut against; an operating unit, which is arranged on the surface of the housing unit and is located at a relative position for the user to hold the housing unit for easy operation, and the operating unit generates an operating signal when operated; and an ocular pressure detection module, which is arranged in the containing space, and connected to the operating unit, the intraocular pressure detection module receives the operating signal and measures the intraocular pressure value of an eye to be tested in at least one of the eye sockets; wherein the intraocular pressure detection module includes a spray unit, which is arranged in the accommodating space, the spray unit is provided with a spray hole, and is connected to the eye support unit, the spray unit receives a spray signal to output gas from the spray hole, and the gas is sprayed toward the eye support unit to act on the cornea of the eye to be tested attached to the eye support unit; wherein the spray unit includes a pump, which is arranged in the accommodating space and is used to generate the gas; and wherein The pump of the jet unit is an electromagnetic pump, which has: an outer shell; a gas cylinder, a cavity is provided between the two ends of the gas cylinder, the gas cylinder has a gas output end, and the cavity is connected to the gas output end; a coil assembly, having a wire frame and a coil, the coil is arranged around the wire frame, and the wire frame has a through hole; a baffle, arranged in the through hole, and the baffle has a baffle through hole; a push rod, the push rod is arranged in the through hole, and one end of the push rod passes through the baffle through hole; a piston, plugged in a part of the cavity, so that the other part of the cavity forms a gas The invention relates to a housing having an air chamber, and one end of the piston is connected to another part of the push rod; a baffle is arranged at one end of the housing far from the piston, and the baffle is provided with a baffle through hole at a position relative to the through hole; a stopper passes through the stopper through the through hole and is connected to one end of the push rod; and a spring is sleeved around the stopper, and one end of the spring abuts against one end of the stopper, and the other end of the spring abuts against the baffle; wherein the processing unit is connected to the coil, and the processing unit controls the excitation of the coil to drive the stopper to move toward the baffle, so that the piston sprays the air in the air chamber to the cornea of the eye to be tested through the spray pipe. As described in claim 1, the handheld non-contact tonometer, the eye support unit includes a main body, a mounting portion and an eye support portion, the mounting portion is arranged on the shell unit, the main body is adjustably arranged at a relative position of the shell unit along a linear direction through the mounting portion, the eye support portion is formed at one end of the main body, and the eye support portion is used to support at least one eye socket of the user. As described in claim 2, the handheld non-contact tonometer, wherein the mounting portion has a first thread, the main body is provided with a second thread at a position relative to the mounting portion, the first thread and the second thread are threadedly connected to each other, and the displacement stroke of the eye support unit is the stroke of the first thread and the second thread being threadedly connected to each other. The handheld non-contact tonometer as described in claim 1, wherein the tonometer detection module comprises: a linear position detection unit, disposed in the accommodation space, the linear position detection unit detects the corneal position of the eye to be tested to generate a linear direction detection signal; an ocular pressure detection unit, disposed in the accommodation space, and detects the squeezed state of the cornea of the eye to be tested formed by the squeezing of the gas, and generates an ocular pressure signal according to the squeezed state; a processing unit, disposed in the housing unit, and connected to the air jet unit, the operating unit, and the linear position detection unit. The measuring unit is connected to the intraocular pressure detecting unit by signal, the processing unit receives the linear direction detecting signal, and when the linear direction detecting signal meets a detection condition, generates and outputs a prompt signal, the processing unit receives the operation signal to generate and output the air jet signal, the processing unit receives the intraocular pressure signal, and calculates the intraocular pressure value of the eye to be measured according to the intraocular pressure signal; and a prompt unit is arranged in the housing unit and connected to the processing unit by signal to receive the prompt signal, and outputs a prompt output information according to the prompt signal. A handheld non-contact tonometer as described in claim 4, wherein the detection condition is that the cornea of the eye to be tested is located at the linear detection position of the tonometer detection unit. As described in claim 1, the handheld non-contact tonometer, wherein the spray unit includes a spray tube, one end of which is connected to the gas output end of the pump, and the other end of which is connected to the eye support unit and is provided with the spray hole. A handheld non-contact tonometer as described in claim 1, wherein the number of turns of the coil ranges from 700 turns to 1000 turns. The handheld non-contact tonometer as described in claim 1, wherein the matching angle between the strap and the baffle is in the range of 60 degrees to 90 degrees. As described in claim 4, the handheld non-contact tonometer, wherein the tonometer detection module further includes a plane position prompt unit, which is arranged in the accommodation space of the housing unit, and the plane position prompt unit displays a focus pattern. When the focus pattern is located at an alignment position when the eye to be tested observes it from the air jet, it means that the cornea of the eye to be tested is located at the correct plane position. A handheld non-contact tonometer as described in claim 9, wherein the alignment position is the alignment of the center position of the focusing pattern with the center position of the air hole. As described in claim 4, the handheld non-contact tonometer, wherein the linear position detection unit includes a set of infrared light sources and a set of sensors, the infrared light source emits infrared light to the cornea of the eye to be tested, and the sensor receives reflected light and generates the linear direction detection signal. As described in claim 4, the handheld non-contact tonometer, wherein the prompt output information is a light signal, and when the linear direction detection signal meets the detection condition, the prompt output information is a light signal displayed in front of the eye to be tested. As described in claim 9, the handheld non-contact tonometer, the tonometer detection module further includes a diopter compensation unit, which is arranged in the accommodation space between the air jet and the plane position prompt unit, and the diopter compensation unit moves along the same linear direction as the linear position detection unit. A handheld non-contact tonometer as described in claim 1, wherein the operating unit is a button. The handheld non-contact tonometer as described in claim 4 further includes a left/right eye detection unit, which is arranged at the position of the eye support unit relative to the nose bridge of the user, and generates a left eye detection signal or a right eye detection signal to the processing unit. The processing unit determines whether the eye support unit is relative to the left eye socket or the right eye socket of the user according to the left eye detection signal and the right eye detection signal. As described in claim 15, the handheld non-contact tonometer, wherein the left/right eye detection unit includes a first capacitance detector and a second capacitance detector, the first capacitance detector is arranged at the left side of the eye support unit relative to the user's nose bridge, and is used to generate the left eye detection signal, and the second capacitance detector is arranged at the right side of the eye support unit relative to the user's nose bridge, and is used to generate the right eye detection signal. A handheld non-contact tonometer as described in claim 15, wherein the left/right eye detection unit includes a distance detector, and the distance detector is used to generate the left/right eye detection signal. A handheld non-contact tonometer as described in claim 15, wherein the left/right eye detection unit includes a flip detector, and the flip detector is used to generate the left eye detection signal or the right eye detection signal. The handheld non-contact tonometer as described in claim 1 also includes a pan/tilt hole disposed on the surface of the housing unit. The handheld non-contact tonometer as described in claim 1 further comprises a hand strap disposed on the surface of the housing unit.