JP6118162B2 - Ophthalmic equipment - Google Patents

Description

The present invention relates to an ophthalmologic apparatus for examining a patient's eye.

  2. Description of the Related Art Conventionally, in an ophthalmologic apparatus, a method of performing alignment with respect to an eye to be examined by moving a measurement main body portion of the apparatus back and forth and right and left with respect to a base using a joystick or the like. Some of these apparatuses are provided with a lock mechanism that locks the measurement main body to the base so that the measurement main body does not move when the apparatus is not used for a long time or when the apparatus is moved.

For example, a stopper pin that is held by a spring at the bottom of the measurement main body and has a lower tip formed on an external screw is provided. In this case, the knob attached to the upper end of the stopper pin is lowered downward, the external screw at the lower end of the stopper pin is inserted into the nut portion provided with the internal screw inside the base, and the knob is turned to screw it. By locking, the measurement main body is locked to the base.

Further, in Patent Document 1, the above-described method requires a holding means using a spring for holding the stopper pin at the top in the state of use of the apparatus, and such a configuration causes an increase in the number of parts and assembly adjustment man-hours. In addition, the following configuration is disclosed on the assumption that the device itself is enlarged by the lock mechanism itself.

That is, it is configured to have a stopper pin for locking on the base, and when locking the measurement main body, insert the stopper pin from below (base) into the through hole provided in the measurement main body, and rotate the stopper pin. The measurement main body is locked to the base by screwing the external screw on the stopper pin and the internal screw provided in the through hole. By adopting such a configuration, a stopper pin holding means using a spring or the like is not necessary, and the number of parts and assembly adjustment man-hours are reduced, and the apparatus can be downsized.

JP 2001-46337 A

  However, any of the above-disclosed methods can be locked in a used state, that is, in a state where the spherical sliding surface on the lower surface of the joystick provided in the measurement main body is in contact with the upper surface of the base (used state). It is what is done. For this reason, even if the measurement main unit is locked to the base by the lock mechanism, the sliding surface such as the lower surface of the joystick or this sliding surface may come into contact with the surface due to excessive vibration during contact with people or objects or during transportation. There was a risk of damage to the top surface of the base. The sliding surface is provided for smooth alignment when the measurement main body is moved horizontally with respect to the base and alignment is performed on the eye to be inspected. If the upper surface of the base that touches it is damaged, scratched, partially broken, or deformed, the alignment operation becomes difficult or, in the worst case, the alignment operation cannot be performed. There was a problem that optometry and measurement could not be performed.

  The present invention includes a lock mechanism that locks the measurement main body to the base, and a retraction mechanism that pushes up a part or one end of the measurement main body to retreat to a position where the sliding surface such as the lower surface of the joystick does not contact the base. Is.

For this reason, even if an excessive impact is applied to the measurement main unit or base in the locked state, the bottom surface of the joystick, etc., and the top surface of the base that the sliding surface touches during use should not be damaged. It is characterized by.

  Further, the retracting mechanism is configured to be implemented simultaneously with or interlocking with the measurement main body portion locked to the base.

Therefore, when the measurement main body is locked to the base, the sliding surface such as the lower surface of the joystick of the measurement main body is surely separated from the upper surface of the base, and the effect of the present invention can be obtained.
In addition, since the retraction mechanism is provided inside the lock mechanism and a part of the parts is shared, the lock mechanism can be reduced in size, so that the lock mechanism of the present invention can be mounted without increasing the size of the apparatus.

According to the present invention, the lock mechanism that locks the measurement main body to the base includes a retraction mechanism that pushes up one end or a part of the measurement main body to retreat to a position where the sliding surface such as the lower surface of the joystick does not contact the base. By providing, an ophthalmic apparatus provided with a novel locking mechanism that prevents the sliding surface and the upper surface of the base with which the sliding surface is in contact with even when an excessive impact is applied can be provided.

It is side part sectional drawing (at the time of a measurement main-body part unlocking) of the ophthalmic apparatus of this invention. FIG. 2 is a detailed view of the locking mechanism according to the present invention in FIG. 1 (when the measurement main body is unlocked). It is side part sectional drawing (at the time of a measurement main-body part lock) of the ophthalmologic apparatus of this invention. FIG. 4 is a detailed view of the locking mechanism according to the present invention in FIG. 3 (when lifting one end of the measurement main body). FIG. 4 is a detailed view of the locking mechanism according to the present invention in FIG. 3 (when the measurement main body is locked). Detailed view of lock mechanism (perspective view) Action diagram of the locking mechanism (unlocked) Action diagram of the lock mechanism (lifts one end of the measurement main unit) Action diagram of the locking mechanism (lifts and locks one end of the measuring body)

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view of an ophthalmologic apparatus according to an embodiment of the present invention in a use state (when unlocked). The measurement main body 100 includes an optical measurement unit 101 in which an optical system of an optical instrument that performs examination, observation, measurement, etc. of a patient's eye such as an objective eye refractive power measurement device or an intraocular pressure measurement device, The monitor 102 for displaying the measurement result, the control unit 103 containing the control circuit for controlling the drive system in the optical measurement unit 101 and the image displayed on the monitor 102, and the whole are made of resin or the like. The measurement unit 150 covered with the covered cover 104 and the main body moving unit 160 provided with a moving mechanism for moving the measurement main unit 100 horizontally (including the measurement unit 150) while moving the measurement unit 150 up and down.

A base 170 is provided below the measurement main body 100, and the main body moving unit 160 can move the measurement main body 100 on the base 170 in the horizontal direction.

  The gantry 105 is provided to move the measurement unit 150 including the optical measurement unit 101, the monitor 102, and the control unit 103 up and down. When the knob 107 on the joystick 106 is rotated, the pulley 108 below the joystick 106 is moved. The rotation is transmitted to the pulley 110 at the back of the apparatus by the belt 109, and the pulley 110 rotates and the drive shaft 111 also rotates. Since the bearing 112 of the gantry 105 and the upper part of the drive shaft 111 are respectively screwed with an inner screw and an outer screw, the gantry 105 moves up and down as the drive shaft 111 rotates. That is, when the knob 107 on the joystick 106 is rotated, the measurement unit 150 moves up and down.

  The gantry 105 is supported by a gantry frame (not shown), and an urging force is applied upward by a gantry spring 114 that is passed through the spring guide shaft 113 so that the vertical movement of the gantry 105 can be smoothly moved.

An X-axis slide 115 for moving the measurement main body 100 in the X direction (left-right direction) on the base 170 is provided at the bottom of the base 105 and the base frame, and the measurement main body 100 is provided within the base 170 within the base 170. A Y-axis slide 116 for moving in the Y direction (front-rear direction) is provided, and the X-axis slide 115 and the Y-axis slide 116 allow the measurement main body 100 to move in the front-rear and left-right directions.

The examiner moves the measurement main body unit 100 back and forth and right and left with respect to the base 170 with the joystick 106 provided in front of the main body moving unit 160, and further rotates the knob 107 on the joystick 106 to move the measurement unit 150 up and down. Move and align the patient's eyes for observation, measurement, and examination.

In the main body moving unit 160, a lock mechanism 180 that locks the measurement main body unit 100 with respect to the base 170 is disposed between the measurement unit 150 and the joystick 106. In this embodiment, the lock mechanism 180 is disposed between the measurement unit 150 and the joystick 106. However, the lock mechanism 180 is not limited to this position, and may be in the left-right position with respect to the joystick 106 or in front of the joystick 106. That is, it may be arranged anywhere as long as it is in front of the X-axis slide 115 and the Y-axis slide 116 (in the direction of the joystick 106).

The configuration of the lock mechanism 180 will be described with reference to FIGS. 2, FIG. 6 and FIG. 7 are all views when the locking mechanism is in the unlocked state, and FIG. 2 is an enlarged view of a portion from the peripheral portion of the joystick 106 to the locking mechanism 180 in FIG. The lock mechanism 180 is divided into a main body moving part 160 and a base 170. The main body moving part 160 includes a lock knob 117, a lock shaft 118, a cam 119, a cam spring 120, a cam shaft 121, a cam presser. A pin 122, a lock pin 123, a guide for the lock shaft 118, and a guide plate 124 for restricting upward movement when the lock pin 123 is unlocked (during measurement operation) are provided. A through hole 125 through which the shaft 118 passes and an opening 126 into which the lock pin 123 is received when locked are provided.

  In FIG. 2, the cam 119 is rotatable about the cam shaft 121, and a biasing force is applied in the left rotation direction by the cam spring 120 inserted in the same cam shaft 121, so that the protruding portion of the cam 119 is A biasing force is applied upward to the cam pressing pin 122 of the locking shaft 118 by 127. Therefore, in the unlocked state, the locking shaft 118 is biased upward, and the lock pin 123 below the locking shaft 118 hits the guide plate 124 to restrict the upward movement of the locking shaft 118. ing. (See Figure 6)

  In this case, as shown in FIG. 2, since the distance from the cam shaft 121 to the lower end of the cam 119 is shorter than the distance from the cam shaft 121 to the upper surface 130 of the base 170, the lower end of the cam 119 is the upper surface of the base 170. 130 is not touching. Further, since the lower end of the locking shaft 118 is not in contact with the upper surface 130 of the base 170 in the unlocked state, the main body moving unit 160 is movable with respect to the base 170. At this time, the spherical sliding surface 128 below the joystick 106 and the upper surface of the sliding plate 129 on the upper surface 130 of the base 170 are in contact with each other, and the points on the sliding surface 128 and the upper surface of the sliding plate 129 are in contact with each other. The measurement main body 100 can be smoothly moved with respect to the base 170 in the horizontal direction (front-rear and left-right directions) using the joystick 106 due to the relationship between the surfaces. In this embodiment, the sliding plate 129 made of resin such as polyacetate is provided on the upper surface 130 with which the lower sliding surface 128 of the joystick 106 contacts. Therefore, the sliding surface 128 below the joystick 106 may be in direct contact with the upper surface 130 of the base 170 without using the sliding plate 129.

  6 and 7 are a perspective projection view and a perspective view showing in detail the configuration described above when the lock mechanism 180 in the main body moving unit 160 is unlocked. The shape and arrangement of each component are shown, and the state of the lock mechanism 180 when unlocked as described above can be grasped.

  Next, a locking method of the locking mechanism 180 in the present embodiment will be described based on FIGS. 4 and 5 are enlarged views of the portion from the peripheral portion of the joystick 106 to the lock mechanism 108. FIG. 4 is a view when the lock knob 117 is lowered, and FIG. 5 is a view when the lock knob 117 is rotated and the measurement main body 100 is locked to the base 170 thereafter.

  When locking the measurement main body 100 with respect to the base 170, the examiner first operates the joystick 106 to position the locking shaft 118 and the position of the through hole 125 (for the locking shaft 118) of the base 170. Adjust. In the case of the present embodiment, the position of the locking shaft 118 and the position of the through hole 125 of the base 170 are matched by setting the main body moving portion 160 and the base 170 to substantially the same position. To move the main body moving unit 160 and the base 170 together.

  When the position of the lock shaft 118 and the position of the through hole 125 of the base 170 are matched, the examiner lowers the lock knob 117 downward. At this time, the locking shaft 118 is lowered, and the protrusion 127 of the cam 119 is moved downward by the cam pressing pin 122. For this reason, the cam 119 rotates clockwise about the cam shaft 121. Then, the distal end of the locking shaft 118 and the lock pin 123 are inserted into the through hole 125 of the base 170, and the distal end of the cam 119 contacts the upper surface 130 of the main body moving unit 160. At this time, the distance from the cam shaft 121 to the tip of the cam 119 is larger than the distance from the cam shaft 121 to the upper surface 130 of the main body moving unit 160 at the time of unlocking, whereby the main body moving unit 160 (main body measuring unit 100). As shown in FIGS. 4 and 5, the lower sliding surface 128 of the joystick 106 also rises, and is positioned away from the upper surface of the sliding plate 129 on the base 170. That is, the sliding surface 128 below the joystick 106 is retracted to a position retracted from the upper surface of the sliding plate 129 on the base 170.

  In this state, when the examiner rotates the lock knob 117, the lock pin 123 below the lock shaft 118 also rotates, and the lock pin 123 fits into the opening 126 in the base 170, as shown in FIG. Further, the lock pin 123 is limited to the lower surface of the upper surface plate of the base 170, whereby the main body measuring unit 100 is locked with respect to the base 170. Since the upward biasing force from the cam spring 120 is always applied to the lock pin 123, the lock of the main body measuring unit 100 with respect to the base 170 becomes strong, the locked state is stabilized, and the cam 119 The sliding surface 128 below the joystick 106 is separated (retracted) from the upper surface of the sliding plate 129 on the base 170.

  FIG. 3 is a side sectional view of the ophthalmic apparatus of the present invention when locked. As can be seen from this figure, by locking the main body measuring unit 100 with the locking mechanism 180 of the present invention, the front part of the main body measuring unit 100 is raised, so that the lower sliding surface 128 of the joystick 106 becomes the base. The main body measuring unit 100 can be locked to the base 170 in a state of being separated from the upper surface of the sliding plate 129 on the 170.

  FIGS. 8 and 9 are perspective views showing in detail the configuration described above when the lock mechanism 180 in the main body moving unit 160 is locked. The shape and arrangement of each component are shown. When the locking knob 117 described above is lowered (FIG. 8), and then the locking knob 117 is rotated, the measurement main body 100 is mounted on the base 170. The state of the lock mechanism 180 when it is locked (FIG. 9) can be grasped.

  In the present embodiment, as described above, when the measurement main body 100 is locked with respect to the base 170 by the lock mechanism 180, the front of the measurement main body 100 is lifted, whereby the sliding surface 128 below the joystick 106 is lifted. It moves away (withdraws) from the upper surface of the sliding plate 129 on the base 170.

  The measurement body 100 is lifted forward using the positions of the X-axis slide 115 and the Y-axis slide 116 as fulcrums. This is because the X-axis slide 115 and the Y-axis slide 116 are provided with a certain gap in the slide portion in order to make the operation smooth. The front of the measurement main body 100 is lifted up using the provided gap. Therefore, in the configuration of the present embodiment, the lock mechanism 180 is disposed in front of the X-axis slide 115 and the Y-axis slide 116 (on the joystick 106 side). As described above, the arrangement of the lock mechanism is not limited to the position between the X-axis slide 115 and the Y-axis slide 116 and the joystick 106 as described in the present embodiment. It only needs to be ahead.

  In the present embodiment, the retraction of the sliding surface 128 below the joystick 106 by the cam 119 is simultaneously performed in conjunction with the locking operation, but, of course, it may be configured separately. In that case, the retracting operation and the locking operation of the sliding surface 128 below the joystick 106 by the retracting mechanism are performed separately.

  Further, in this embodiment, a cam 119 is employed as the retraction mechanism. This is used to reduce the downward force when lifting the front of the measurement main body 100, but this is not limited to the configuration using the cam, and is similar to the lock shaft 118. It is also possible to arrange such a shaft as a retracting shaft side by side with the locking shaft 118, and when the locking knob 117 is lowered, the retracting shaft is also lowered at the same time. In this case, there is a possibility that the force for lowering the locking knob 117 may be larger than the configuration using the cam as in this embodiment.

  In addition, in this embodiment, the lock pin 123 is used when the measurement main body 100 is locked to the base 170. However, the present invention is not limited to this. The lower end portion of the locking shaft 118 is processed into an external screw, and an inner screw is applied instead of the through hole 125 on the base 170 side, and the locking knob 117 is rotated. It is also possible to lock the external screw at the tip and the internal screw on the base 170 side by screwing. In this case, it is necessary to rotate the lock knob 117 many times, and the lock operation may be troublesome.

The embodiments of the present invention have been described in detail above. However, these are merely examples, and the present invention is not construed as being limited by specific descriptions in the embodiments. The present invention can be carried out in a mode in which various changes, modifications, improvements, etc. are added based on the knowledge, and such a mode is within the scope of the present invention as long as it does not depart from the gist of the present invention. It should be understood that it is included in.

As described above, according to the present embodiment, since the main body measurement unit locks against the base while the lower sliding surface of the joystick is separated from (retracted from) the upper surface of the base, Even when an excessive impact is applied, the sliding operation can be performed so that the sliding surface and the upper surface of the base with which the sliding surface contacts are not damaged.

100 ··· Measurement body portion 106 · · Joystick 117 · · Locking knob 118 · · Locking shaft 119 · · Cam 122 · · Cam holding pin 123 · · Lock pin 128 · · Slide surface 129 below the joystick · · Sliding plate 130 .. Upper surface 150 of main body moving part ..Measurement part 160 ..Main body moving part 170 ..Base 180 ..Lock mechanism

Claims (2)

An optical system storage unit for inspecting the eye to be examined is mounted, and a measurement main body unit that can move horizontally on the base,
In an ophthalmologic apparatus comprising a lock mechanism for locking the measurement main body with respect to the base,
The ophthalmic apparatus, wherein the lock mechanism includes a retraction mechanism that lifts one end or a part of the measurement main body and retracts to a position where a part or all of the moving sliding surface does not contact the base. . The ophthalmologic apparatus according to claim 1, wherein the retraction by the retraction mechanism is performed simultaneously with or in conjunction with the lock by the lock mechanism.