JPH0345683Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention prevents an optometric unit (for example, a non-contact tonometer, a refractometer, an ocular fundus camera, etc.) from coming into contact with the eye to be examined. This invention relates to an ophthalmological instrument equipped with a safety device.

[Prior Art] Examples of conventional devices of this kind include those shown in FIGS. 8 and 9, for example. A pair of guide rails 2 (one of which is omitted) with a U-shaped cross section extending in the front-rear direction are arranged substantially parallel on a mount base 1, while a mount 4 supporting an optometry unit 3 is provided with a pair of guide rails 2 extending in the left-right direction. A guide shaft 5 extending in the guide rail 2 is slidably passed through the guide rail 2, and wheels 6 fixed to both ends of the guide shaft 5 are rotatably disposed within the guide rail 2 as shown in FIG. In the drawing, reference numerals 7 and 8 are a chin rest and a forehead rest, respectively, and reference numeral 9 is a joystick as an operating section for moving the optometry unit 3.

Now, the optometry unit 3 moves in the front-rear direction (eighth direction) as the wheels 6 roll within the guide rail 2.
It is configured to be movable in the direction of the arrow y in the figure), and is also configured to move in the left-right direction (the direction of the arrow x in FIG. 8) by sliding the pedestal 4 on the guide shaft 5.

In order to examine the eyes of a subject positioned on the chinrest 7 and the forehead rest 8, the optometry unit 3 is used.
For example, in the case of a non-contact tonometer, the tip of the airflow emitting nozzle is brought close to the cornea of the subject's eye to measure the subject's eye.

However, if the pedestal 4 is advanced too far beyond the predetermined position, there is a risk that the tip of the nozzle will hit the cornea of the subject's eye, causing damage to the cornea.

Therefore, in order to prevent such a situation from occurring, there have conventionally been devices equipped with a safety device 10 as shown in FIG. 9. This device 10 has a slit 2b extending in the front-rear direction on the upper wall 2a of the guide rail 2.
On the other hand, a stopper plate 11 is disposed on the upper wall 2a so as to be movable in the front-rear direction, and a wheel contact portion 11a formed on the stopper plate 11 is inserted into the guide rail 2 through the slit 2b. It protrudes to engage with and disengage from the wheel 6. The stopper plate 11 also has a plurality of pin engagement holes 11b.
The stopper plates 11 are bored in parallel in the front-rear direction, and the stopper plates 11 are biased rearward (leftward in FIG. 9) by a tension spring 12. Further, a leaf spring 13 is fixed to the guide rail upper wall 2a with screws 14 so as to be located above the stopper plate 11. In addition, this leaf spring 13
A knob 15 is attached to the tip of the stopper plate 11, and an engagement pin 16 formed on the knob 15 is configured to be freely engageable and detachable from the pin engagement hole 11b of the stopper plate 11.

To adjust the safety device 10 as described above, first, the knob 15 is lifted upward against the biasing force of the plate spring 13, and the engagement pin 16 is pulled out from the pin engagement hole 11b. Then, the stopper plate 11 is slid rearward (leftward in FIG. 9) by the biasing force of the tension spring 12, and the wheel contact portion 11a comes into elastic contact with the wheel 6. In this state, when the frame 4 is moved back and forth, the stopper plate 11 will slide back and forth as the wheels 6 move. The pedestal 4 is then moved forward to bring the optometry unit 3 close to a position where the tip of the nozzle (not shown) is a predetermined distance away from the subject's eye (safety limit position). This position differs depending on the subject. When the knob 15 is released at this position, the engagement pin 16 engages with the pin engagement hole 11b of the stopper plate 11 due to the biasing force of the leaf spring 13, and the movement of the stopper plate 11 is stopped. Contact part 11
The position of a is determined. As a result, even if the optometry unit is mistakenly moved far forward during measurement, the wheel 6 will move forward from the wheel contact portion 11a of the stopper plate 11.
Since the lens does not move, the optometry unit 3 is prevented from coming into contact with the eye to be examined during the examination.

[Problems to be Solved by the Invention] However, with such conventional devices, if the examiner operates the safety device 10 appropriately for each subject, a safe distance can be secured; If the examiner does not readjust the safety device 10 even though the examinee has changed, the eyes of the subsequent examinee may be closer to the apparatus than the eyes of the previous examinee. , in the adjustment position configured for the previous subject, the optometric unit 3 is placed on the eye of the subsequent subject during the eye examination of this subject.
It is also possible that the two come in contact with each other.

[Means for Solving the Problems] This invention was made by focusing on the problems of the conventional methods, and it is designed to move the pedestal equipped with the optometry unit in the front and back or lateral directions on the pedestal base. In the ophthalmological instrument, the ophthalmological instrument is provided with a safety device that prevents the optometry unit from coming into contact with the eye to be examined by stopping the pedestal base at any position in the front-back direction, the safety device being attached to the pedestal base. A stopper member extending in the front-rear direction is disposed on the top so as to be movable back and forth, and the stopper member has an abutted part that comes into contact with the abutting part on the pedestal side and prevents the pedestal from moving forward. forming a locked part that is continuous along the front-rear direction on the stopper member, and providing a locking part on the pedestal base side that engages and disengages with the locked part of the stopper member;
After the eye examination is completed, the optometry measurement preparation operation is detected, the locking state between the stopper member and the locking portion is released, the stopper member is moved back to the initial position, and the stopper member and the locking portion are The ophthalmological instrument is characterized by being provided with a reset means for re-engaging.

[Operation] According to this means, when an eye to be examined is examined, the locked portion of the stopper member and the locking portion are locked at an arbitrary position. With this, the abutting portion of the pedestal comes into contact with the abutted portion of the stopper member, thereby stopping the gantry from moving forward, thereby preventing the optometry unit from coming into contact with the subject's eye during the examination.

Then, when the optometry of the subject is finished and the optometric measurement preparation operation is performed in order to perform the optometric measurement of the next subject, the reset means causes the stopper member to engage with the locked portion at the forward position. After the locking state with the stopper member is released, the stopper member is slid rearward to the initial position, and the locked portion and the locking portion are locked again.

After that, when attempting to examine the eyes of the next subject from this state, if you try to move the pedestal forward without operating the locking part, the stopper member will be locked at the initial position due to the locking state. , the abutting portion of the pedestal comes into contact with the abutting portion of the stopper member. Therefore, in this state, the eye test cannot be performed, and the patient realizes that the safety device is not operated and operates the safety device again as described above to perform the eye test, causing the eye test unit to come into contact with the eye to be examined. This prevents such occurrences and ensures safety during optometry.

[Example] This invention will be explained below based on each example. In this description, parts or members that are the same or equivalent to the conventional ones are given the same reference numerals and redundant description will be omitted.

1 to 4 are diagrams showing a first embodiment of this invention.

The safety device 21 of this embodiment is configured as follows.

That is, on the bottom surface 2c of the guide rail 2 having a U-shaped cross section, a rack 22 that meshes with the gear 6 serving as an abutting portion is disposed along the front-rear direction. By rolling the gear 6 on this rack 22, the frame 4 is configured to be moved back and forth. A protrusion 23 is provided on the guide shaft 5 on the outside of the gear 6.

On the other hand, a support member 25 is attached to the side surface 2d of the guide rail 2 with screws 24. A stopper member 26 extending in the front-rear direction is slidably guided by the support member 25 in the front-rear direction. Further, a plate spring 27 is fixed to the bottom surface of the support member 25 with screws 28 .

The stopper member 26 has the gear 6 at its front end.
A stopper piece 26a, which serves as an abutted part that abuts, is bent and formed, and a latched part 26b having an uneven shape along the front-rear direction is formed on the rear side. This stopper member 26 is biased rearward (rightward in FIGS. 1 and 2) by a tension spring 29.

On the other hand, a resin component 30 is disposed at the rear end portion of the leaf spring 27 (the right side portion in FIGS. 1 and 2).
This resin part 30 has a protrusion 23 on the gear 6 side.
The slope 31 that comes into contact with the stopper member 26
A locking portion 32 that locks on the locked portion 26b of
Nozzle pieces 33 protruding from e are respectively formed. The locking portion 32 is biased by the leaf spring 27 in a direction to lock onto the locked portion 26b.

By the way, the reset means of this embodiment is mainly composed of a leaf spring 27, a tension spring 29, a protrusion 23, a slope 31, etc., and is used to perform the operation of preparing for optometry measurement, in this embodiment, retracting the pedestal 4 to a predetermined position. When the protrusion 23 is
The locking portion 32 is disengaged from the locked portion 26b against the biasing force of the leaf spring 27, and the stopper member 26 is retreated to the initial position by the tension spring 29. part 26b and locking part 3
2 are engaged with each other.

Next, the operation of the safety device 21 having such a configuration will be explained.

When performing an eye examination, the examiner first examines the knob piece 33.
is lowered against the biasing force of the leaf spring 27 to separate the locking portion 32 from the locked portion 26b of the stopper member 26. Then, the stopper member 26 is guided by the support member 25 and slid rearward by the tension spring 29. And knob piece 3
3 is lowered (locking part 32 and locked part 2
6), gear 6 is set to 22.
Roll the top to move the pedestal 4 forward. At this time, the stopper piece 2 of the stopper member 26 is attached to the gear 6.
6a comes into contact with the stopper member 26, and as the gear 6 rotates, the stopper member 26 is moved forward against the biasing force of the tension spring 29. Then, with the optometry unit 3 brought close to the eye to be examined up to the safe limit position,
The movement of the frame 4 is stopped. At the same time, knob piece 3
Let go of 3. Then, the locking portion 32 engages the locked portion 26 of the stopper member 26 due to the biasing force of the leaf spring 27.
b, the movement of the stopper member 26 is stopped, and the stopper piece 26a is positioned. Therefore, as a result of the stopper piece 26a of the stopper member 26 preventing the gear 6 from moving forward, the eye examination unit 3 does not approach the eye to be examined abnormally during eye examination, and safe eye examination can be performed.

A case will be described in which the eye examination of the subject is completed and the eye examination of the next subject is started. When the pedestal 4 is moved backward to a predetermined position as an operation to prepare for optometry measurement, the protrusion 23 protruding from the gear 6 side retreats and slides on the slope 31, causing the leaf spring 27 to move downward. When bent, the locking portion 32 separates from the locked portion 26b of the stopper member 26. Then,
The stopper member 26 is moved rearward to the initial position by the urging force of the tension spring 29. Then, from this state, when the pedestal 4 is moved forward without holding the knob piece 33, that is, without operating the safety device 10, in order to perform an eye examination on the next subject, the protrusion 23 on the gear 6 side When the pin has moved to the front side of the slope 31, the leaf spring 27 returns and the locking portion 32 locks with the pin locked portion 26b of the stopper member 26, thereby locking the stopper member 26. Therefore, since the pedestal 4 does not move forward any further, the eye examination cannot be performed, and the examiner can sense that the safety device 31 has not been adjusted. As a result, it is possible to prevent the optometry unit 3 from accidentally coming into contact with the subject's eye as in the past, and safe optometry can be performed.

Further, FIG. 5 shows a second embodiment of this invention.

When compared with the first embodiment, this embodiment has the following:
The reset means in the above embodiment is composed of a foot 35, a tension spring 29, a leaf spring 27, and the like. When the gear 6 moves backward, the step piece 35 is pushed down by the gear 6, so the locking part 32 is disengaged from the locked part 26b of the stopper member 26, and the stopper member 26 is moved by the tension spring 29 to the first embodiment. Similarly, it is automatically returned to the initial position, and at this position, the locking portion 32 is once again locked to the plate spring 27 in the locked portion 26b.

In this way, there is no need to form the protrusion 23 on the gear 6 side as in the first embodiment, so that the number of parts can be reduced.

The other configurations and operations are the same as those in the first embodiment, so their explanations will be omitted.

6 and 7 show a third embodiment of this invention.

This embodiment is based on the slope 31 of the first embodiment.
In place of the protrusion 23, etc., the following configuration is provided. That is, a seesaw member 38 is disposed within the gantry base 1 so as to be swingable about a support shaft 39. This seesaw member 38 has an insertion hole 38a formed at the left end in the figure, and this hole 38a
The locking rod 4 is connected to the lower surface of the leaf spring 27.
0 is inserted through the locking rod 40, and a flange portion 40a formed at the lower end of the locking rod 40 is locked in the insertion hole 38a. Further, this seesaw member 38 is formed with an inclined surface portion 38b at the right end in the figure, and a balance weight 38c is disposed on this seesaw member 38, and this weight 3
The side on which 8c is arranged is set to be lowered during normal times. On the other hand, a protruding piece 4b is formed on the bottom surface 4a of the pedestal 4, and a sliding pin 41 is protruded substantially horizontally from the protruding piece 4b toward the rear.

In this embodiment, the reset means is composed of a leaf spring 27, a tension spring 29, a seesaw member 38, a locking rod 40, a sliding pin 41, and the like.

Normally, when performing an eye exam, the eye is examined sequentially from the right eye to the left eye. First, when performing optometry on the right eye,
As in the first embodiment, the stopper member 26 is set at a position corresponding to the safety limit position by operating the knob piece 33. When the examination of the right eye is completed, the pedestal 4 is moved backward, and the pedestal 4 is slid to the right in FIGS. 6 and 7 on the guide shaft 5. In this case, the sliding pin 41 on the pedestal 4 side is connected to the seesaw member 38.
slides on the upper surface side of the inclined surface portion 38b. Then,
Since the left side portion of the seesaw member 38 in FIG. 6 is raised, no external force acts on the leaf spring 27, and the engagement between the locked portion 26b of the stopper member 26 and the locking portion 32 on the leaf spring 27 side is prevented. The locked state is maintained.
Therefore, the stopper member 26 does not move from the position set by the right eye. In the same subject, the safety limits for the right eye and the left eye hardly change, so the safety of the left eye is also ensured.

On the other hand, when the optometry of the subject is completed, that is, the optometry of the left eye is completed, the pedestal 4 is moved backward in preparation for the optometry of the right eye of the next subject, and the mount 4 is moved to the left side in the figure via the guide shaft 5. and slide it. This operation is the eye measurement preparation operation in this embodiment. Then, this time, the sliding pin 4 provided on this pedestal 4
1 slides on the back side of the inclined surface portion 38b of the seesaw member 38, as shown by the two-dot chain line in FIG. As a result, the seesaw member 38 swings around the support shaft 39, and the right side in the figure, that is, the inclined surface portion 38b side rises, and the locking rod 40 side falls.
The leaf spring 27 is pulled downward via this locking rod 40. Now, the locking part 3 on the leaf spring 27 side
2 is released from the locked portion 26b of the stopper member 26, and the stopper member 26 is retreated by the biasing force of the tension spring 29 and returned to the initial position. When the backward movement is completed, the locking portion 32 locks with the locked portion 26b of the stopper member 26 due to the biasing force of the leaf spring 27, and the movement of the stopper member 26 is stopped, so the knob piece 33 is operated. If the adjustment is not made, the eye examination of the next patient cannot be performed, and as a result, the eye examination unit 3 is prevented from coming into contact with the eye of the patient to be examined, as in the first embodiment, without forgetting the adjustment. be able to.

The other configurations and operations are the same as those in the first embodiment, so their explanation will be omitted.

Further, in each of the embodiments described above, movement of the pedestal 4 toward the rear or to the left is detected as an operation to prepare for optometry measurement. Since the subject's forehead moves toward and away from the forehead rest part 8, this is detected and the locking part 32 on the plate spring 27 side is moved from the locked part 26b of the stopper member 26 using a solenoid or the like. The stopper member 26 may be returned to the initial position by detaching the stopper member 26, or the stopper member 26 may be returned by detecting a printing operation (not shown).

In each of the above embodiments, the gear 6 is used as the contact portion on the pedestal side, but the present invention is not limited to this, and it goes without saying that a protrusion or the like may be formed on the pedestal.

[Effect of the invention] As explained above, according to this invention,
When the examinee changes, the stopper member is automatically returned to the initial position and locked in this position when examining the next examinee's eyes, so that the examiner can adjust the position of the stopper member. Since the eyes of the next patient cannot be examined unless adjustments are made, there is no possibility of operator error and safety can be ensured, which is a practical benefit. do.

[Brief explanation of the drawing]

Figures 1 to 4 are views showing the first embodiment of the ophthalmological instrument of this invention. Figure 1 is a horizontal cross-sectional view of the safety device of the ophthalmological instrument, and Figure 2 is a cross-sectional view of the safety device of the ophthalmological instrument, and Figure 2 shows the safety device of the ophthalmological instrument. FIG. 3 is a sectional view taken along the line - in FIG. 1, FIG. 4 is a perspective view showing the stopper member, etc. of the device, and FIG. 5 is a second embodiment of this invention. A perspective view corresponding to FIG. 4 showing an example, and FIGS. 6 and 7 are views showing a third embodiment of this invention. FIG. FIGS. 8 and 9 are diagrams showing a conventional ophthalmological instrument, FIG. 8 is a perspective view showing the entire ophthalmic instrument, and FIG. 9 is a perspective view showing the safety device of the ophthalmic instrument. FIG. 3 is a sectional view along the front-rear direction. 1... Frame base, 3... Optometry unit, 4...
... Frame, 6... Gear (abutting part), 21... Safety device, 26... Stopper member, 26a... Stopper piece (abutted part), 26b... Locked part, 32...
Locking portion, reset means, 27... plate spring, 29...
...Tension spring, 23...Protrusion, 31...Slope.

Claims (1)

[Claims for Utility Model Registration] A pedestal equipped with an optometry unit is mounted on a pedestal base so as to be movable in the front and rear directions or in the lateral direction, and the pedestal base is stopped at any position in the front and back direction. In an ophthalmological instrument equipped with a safety device that prevents an optometry unit from coming into contact with the eye to be examined, the safety device includes a stopper member that extends in the front-rear direction on the pedestal base and is movable back and forth; The stopper member is formed with an abutted portion that comes into contact with the abutting portion on the pedestal side and prevents the pedestal from moving forward, and the stopper member has a latched portion that is continuous along the front-rear direction. On the other hand, a locking portion is provided on the pedestal base side to lock and release the locked portion of the stopper member, and further, after the eye examination is completed, an eye test preparation operation is detected and the stopper member and the locking portion are connected. 1. An ophthalmological instrument comprising reset means for releasing the locked state of the stopper member, retracting the stopper member to return to the initial position, and re-engaging the stopper member and the locking portion.