JP2001046337A - Ophthalmologic measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmologic measurement device provided with a stopper structure capable of keeping an unlocked state without using an unlocking keeping means when measuring optical characteristics. SOLUTION: A first through-hole 53 is formed at the bottom wall 51 of an ophthalmologic measurement device main body 50, an inner screw 54 is formed at the first through-hole 53 and a second through-hole 63 is formed at the upper wall 61 of a base 60. A stopper pin 70 is arranged vertically movably between a locking position and an unlocking position, an outer screw 75 to be screwed to the inner screw 54 of the first through-hole 53 at the time of locking is formed at the upper end part and a center blind hole 78 is formed from below at the pin center part. A stopper pin supporting means 80 is provided with a vertical insertion part 82 insertible from below to the center blind hole 78 of the stopper pin 70 and supports the stopper pin 70 at unlocking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic measuring device such as a keratometer, a refractometer, a refractor keratometer, or a fundus camera.
The present invention relates to an ophthalmologic measurement apparatus including a stopper structure that can lock an ophthalmic measurement main body with respect to a base.

[0002]

2. Description of the Related Art As shown in a front view of FIG. 1A, an ophthalmologic measuring apparatus of this kind has an ophthalmologic measuring main body 10 mounted on a base 20 and movable with respect to the base 20. Is configured. In order to prevent the ophthalmic measurement main body 10 from moving relative to the base 20 when moving or transporting the ophthalmic measurement device, a stopper as shown in an enlarged fragmentary sectional view of a main part of FIG. A stopper structure 30 using the pin 1 is provided between the ophthalmic measurement main body 10 and the base 20.

In FIGS. 1A and 1B, an ophthalmologic measurement main body 10 has built-in components necessary for ophthalmologic measurement, such as an optical measurement unit 31, a monitor 32, a joystick 33, and an arithmetic processing unit (not shown). , Bottom wall 11 facing base 20
Has a guide unit 12. Guide unit 12
Has a through hole for accommodating the stopper pin 1 and for inserting and removing the tip of the stopper pin 1 on the lower wall thereof.

As shown in a sectional view of a main part of the stopper structure 30 shown in FIG. 2, a nut portion 22 is fixed to a first through hole 23 formed in an upper wall 21 of a base 20. An inner screw 24 is formed on the inner surface of the nut 22.

[0005] As shown in FIG.
It has a stepped structure in which cylindrical bodies are stacked in multiple stages, and is mounted so as to be movable up and down in the guide portion 12 of the ophthalmic measurement main body 10. The stopper pin 1 includes, in order from the top, an operation knob 2 operated by a user,
A sliding portion 3 that moves up and down while sliding on the inner surface of the guide portion 12; a locking portion 8 for locking the biasing spring 7; and a stroke portion 4 that defines the amount of pushing of the stopper pin 1
And a screw protrusion 5 having an outer screw 6 formed on the outer surface. Then, the lock is released and the ophthalmic measurement main body 1 is released.
When moving 0 back and forth and left and right with respect to the base 20,
It is necessary to raise the stopper pin 1 so that the screw protrusion 5 does not hit the upper wall 21 of the base 20 and maintain that state. Therefore, between the bottom wall 11 of the ophthalmic measurement main body 10 and the sliding portion 3 of the stopper pin 1, the biasing coil spring 7 is provided.
Is provided.

Next, a method of locking the ophthalmic measurement main body 10 to the base 20 in the stopper structure 30 will be described with reference to FIG.

The screw protrusion 5 of the ophthalmic measurement main body 10 is
The ophthalmic measurement main body 10
Is positioned. When the user pushes down the operation knob 2 of the stopper pin 1 while resisting the spring force of the biasing coil spring 7, a screw projection 5 provided at the lower end of the stopper pin 1 is provided.
Abuts against the inner screw 24 of the nut portion 22. When the operation knob 2 is rotated while applying a downward force, the outer screw 6 of the screw protrusion 5 is screwed with the inner screw 24 of the nut portion 22, and the ophthalmologic measurement main body 10 is locked with respect to the base 20. Fixed. Conversely, when the user rotates the operation knob 2 in the direction opposite to that at the time of screwing, the screw protrusion 5 and the nut 2
2 is released. At this time, when the user releases the hand from the operation knob 2, the stopper pin 1 is lifted by the spring force of the urging coil spring 7, and the sliding portion 3 is locked by the stopper surface on the upper part of the guide portion 12. Thus, the unlocked state is maintained.

However, the stopper structure 30 has the following problems. That is, the urging coil spring 7 for holding the stopper pin 1 raised so that the screw protrusion 5 of the stopper pin 1 does not come down and come into contact with the upper wall 21 of the base 20 when the lock is released. It is necessary to provide lock release holding means such as Providing such a lock release holding means in the stopper structure 30 increases the number of parts and the number of assembling and adjusting steps. At the same time, the size of the stopper structure 30 is increased due to the necessity for the installation location of the lock release holding means. Therefore, there is a problem that the installation location of the stopper structure 30 is restricted, or it is difficult to reduce the size of the device. Was.

[0009]

Therefore, the technical problem to be solved by the present invention is to measure the optical characteristics when measuring the optical characteristics.
It is an object of the present invention to provide an ophthalmologic measuring apparatus provided with a stopper structure capable of holding an unlocked state without using unlocking means such as a biasing coil spring.

[0010]

In order to solve the above technical problems, an ophthalmologic measuring apparatus according to the present invention has the following features.

[0011] That is, there are provided a base, an ophthalmologic measurement main body movably mounted on the base, a stopper pin for locking the ophthalmic measurement main body to the base, and stopper pin support means for supporting the stopper pin. A first through hole is formed in a bottom wall of the ophthalmic measurement main body, an inner screw is formed in the first through hole, and a second through hole is formed in a top wall of the base at a position corresponding to the first through hole. A hole is formed, and the stopper pin is vertically movably disposed between a locked position inserted into both the first through hole and the second through hole and an unlocked position at which the upper end thereof comes out of the first through hole. And, at the upper end thereof, an external screw which is screwed to the internal screw of the first through hole at the time of locking is formed, and a central blind hole is formed at the center of the pin from below, and the stopper pin support means includes: stopper A vertical insertion portion which can be inserted into the central blind hole from the lower side of the emission, characterized by comprising from stopper pin receiving member for supporting the stopper pin when unlocked.

According to the above apparatus, when the external thread screwed to the internal thread of the first through hole is released at the time of locking, the stopper pin drops by its own weight, and the dropped stopper pin becomes the stopper pin receiving member. Supported by
Therefore, the unlocked state can be maintained without using unlocking means such as a biasing coil spring. Since the stopper structure is simplified by eliminating the need for an unlocking holding means such as a biasing coil spring, the number of parts and the number of assembling / adjustment steps can be reduced. The installation location is not restricted, and the size of the device can be reduced. In addition, the vertical insertion part is
Since it can also be used as a guide when passing through the through hole and the second through hole, the insertion operation is facilitated.

Preferably, the stopper pin receiving member is
The apparatus further includes a support portion which is L-shaped and extends from the base and supports the vertical insertion portion upright.

According to the above configuration, the support portion of the stopper pin receiving member functions as drop prevention means for receiving the stopper pin dropped by its own weight after being unlocked. Since the stopper pin is supported only by the support portion extending from the base in a bar shape, and the other portions are free, the range in which the stopper pin can be gripped is extremely wide. Therefore, the stopper pin is easily gripped, and the mounting property of the stopper pin is improved.

Preferably, the upper end of the stopper pin is
In the unlocked position, it is in the second through hole.

According to the above configuration, since the upper end and the lower end of the stopper pin are guided by the second through hole and the vertical insertion portion, respectively, the mounting of the stopper pin is further improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to FIGS.

FIG. 3A shows a stopper structure 90 provided in a refract keratometer as an ophthalmologic measuring apparatus.
FIG. The refract keratometer is an ophthalmic measurement main body 50 having a built-in ophthalmologic measurement function such as an optical measurement unit 91, a display 92, and a joystick 93, and a base for movably supporting the ophthalmic measurement main body 50. And a base 60 placed on a table such as a table. As shown in an enlarged partial cutaway view of the main part of FIG.
Is provided between the ophthalmic measurement main body 50 and the base 60.

FIG. 4 is a sectional view of a main part showing a stopper structure 90 provided in the ophthalmologic measuring apparatus. As shown in FIG. 4, the ophthalmologic measurement main body 50 has a built-in moving mechanism (not shown) that can move back and forth and left and right with respect to the base 60, and the examiner can use a joystick 93 provided on the ophthalmologic measurement main body 50.
Is operated, the optical measurement unit 91 is positioned so as to aim and focus on the subject's eye. A first through hole 53 is provided in the bottom wall 51 of the ophthalmic measurement main body 50. The first through hole 53 is a hole having a predetermined size, and has an inner screw 54 formed on an inner surface thereof.

On the upper wall 61 of the base 60, a guide portion 62 extending downward is provided at a position corresponding to the first through hole 53 of the ophthalmic measurement main body 50. The guide portion 62 is
It has a through hole 63 and a first receiving surface 6 at its lower end.
4 is provided. Bottom wall 51 and base 60 of ophthalmic measurement main body 50
A predetermined gap is provided between the upper wall 61 and the upper wall 61 so that they do not contact each other.

The base 60 has a mounting recess 94 having a lower portion recessed inward for mounting the stopper pin 70 to the stopper pin receiving member 80 on the side of the examiner. The stopper pin receiving member 80 is formed by bending a round wire into a substantially L-shape, and is fixed and supported by screws at the lower end of a support member 95 extending downward from the upper wall 61 of the base 60, and is horizontally supported. It comprises a supporting portion 83 extending and a columnar vertical insertion portion 82 extending vertically upward toward the first through hole 53 of the ophthalmic measurement main body 50.

Stopper pin 70 as locking means
Is a step structure in which cylindrical bodies are concentrically stacked in multiple stages such that the outer diameter increases as going downward. The stopper pin 70 having this step structure is arranged in order from the top.
Screw projections 7 each having an external thread 75 formed on the surface
4. At least a sliding portion 76 that slides up and down with respect to the inner surface of the guide portion 62 of the base 60 and a base portion 79 are provided.
The outer screw 75 of the screw protrusion 74 at the upper end is formed in the first through hole 53.
With the inner screw 54. The base portion 79 has a first
When the stopper pin 70 is lifted, the first stopper surface 71
The moving distance of the stopper pin 70 is defined by contacting the receiving surface 64. Further, the base portion 79 has a third stopper surface 73 on the bottom surface, and the third stopper surface 73 abuts on the second receiving portion 81 of the stopper pin receiving member 80.
It is accepted by. The stopper pin 70 has a central blind hole 78 at the center thereof. This central blind hole 78
Is a cylindrical cavity whose bottom surface 73 of the stopper pin 70 is open upward, and is dimensioned so as to be inserted into a cylindrical vertical insertion portion 82.

Next, a locking and unlocking method using the stopper structure 90 will be described with reference to FIG.

When measuring the optical characteristics of the subject's eye using a refract keratometer, as shown in FIG. 4B, the stopper structure 90 is unlocked and the ophthalmologic measurement main body 50 is moved forward and backward with respect to the base 60. , Move left and right. When not using the refract keratometer for a while after the measurement is completed, or when moving the refract keratometer, it is necessary to lock the ophthalmic measurement main body 50 so as not to move freely with respect to the base 60. Then, the user grasps the base portion 79 of the stopper pin 70, and
The stopper pin 70 is lifted up along the second and guide portions 62. After the screw protrusion 74 of the stopper pin 70 approaches the lower end of the first through hole 53, the stopper pin 70 is rotated until the second stopper surface 72 of the base portion 79 contacts the first receiving surface 64 of the guide portion 62. As a result, as shown in FIG.
The ophthalmic measurement main body 5 is screwed with the inner screw 54 of the first through hole 53.
0 is locked to the base 60 and fixed.

When the stopper pin 70 is rotated in a direction opposite to the above, the stopper pin 70 is lowered, and at a certain position, the screwing between the outer screw 75 of the screw projection 74 and the inner screw 54 of the first through hole 53 is established. It is released. After the screwing is released, when the user releases the hand holding the base 79,
The stopper pin 70 includes a vertical insertion portion 82 and a guide portion 62.
Fall by its own weight while being guided by. Thereafter, the third stopper surface 73 of the stopper pin 70 comes into contact with the second receiving portion 81 of the stopper pin receiving member 80, and the stopper pin 70 is received by the stopper pin receiving member 80 as shown in FIG. The ophthalmic measurement main body 50 is a base 60
Is unlocked. Thereafter, the user can freely move the ophthalmic measurement main body 50 relative to the base 60 without the stopper pin 70 coming into contact with the bottom wall 51 of the ophthalmic measurement main body 50.

The present invention is not limited to the above embodiment, but can be implemented in other various modes.
For example, the stopper pin receiving member 80 can be configured to fix and support the support portion 83 on the side wall of the base 60 with a screw. The stopper pin receiving member 80 has a vertical insertion portion 82 extending vertically toward the first through hole 53 of the ophthalmic measurement main body 50 and a flange-shaped support having an area capable of receiving the third stopper surface 73. The support portion 83 can be configured to be attached to a bottom wall provided in the attachment concave portion 94 of the base 60. Further, a bottom wall having a concave portion large enough to receive the bottom surface 73 of the base portion 79 of the stopper pin 70 is provided in the mounting concave portion 94 of the base 60, and the vertical insertion portion 82 is erected from the center of the concave portion. You can also.

[Brief description of the drawings]

1A and 1B show a conventional ophthalmologic measuring apparatus, wherein FIG. 1A is a front view showing the entire apparatus, and FIG.

FIG. 2 is a sectional view of a main part showing a stopper structure provided in the apparatus of FIG.

3A and 3B show an ophthalmologic measuring apparatus according to an embodiment of the present invention, wherein FIG. 3A is a front view showing the entire apparatus, and FIG.

FIG. 4 is a sectional view of a main part showing a stopper structure provided in the apparatus of FIG. 3; (A) shows a locked state, and (B) shows an unlocked state.

[Explanation of symbols]

Reference Signs List 50 ophthalmic measurement main body 51 bottom wall 53 first through hole 54 inner screw 60 base 61 upper wall 62 guide portion 63 second through hole 64 first receiving surface 70 stopper pin 71 first stopper surface 72 second stopper surface 73 third stopper Surface 74 Screw protrusion 75 External screw 76 Sliding part 78 Center blind hole 79 Base part 80 Stopper pin receiving member (stopper pin supporting means) 81 Second receiving part 82 Vertical insertion part 83 Support part 90 Stopper structure 91 Optical measuring part 92 Display 93 Joystick 94 Mounting recess 95 Supporting member

Claims (3)

[Claims] 1. A base (60) and an ophthalmic measurement main body (50) movably mounted on the base (60).
A stopper pin (70) for locking the ophthalmic measurement main body (50) to the base (60); and a stopper pin supporting means (8) for supporting the stopper pin (70).
0), a first through hole (53) is formed in the bottom wall (51) of the ophthalmic measurement main body (50), and the first through hole (53) is formed.
An inner screw (54) is formed in the first through hole (5) in the upper wall (61) of the base (60).
A second through hole (63) is formed at a position corresponding to (3), and the stopper pin (70) is formed between the first through hole (53) and the second through hole (63).
An upper end portion is vertically movably disposed between a lock position inserted into both of the through holes (63) and an unlock position at which the upper end portion comes out of the first through hole (53). Inner screw (54) of first through hole (53) when locked
An external thread (75) screwed into the pin is formed, and a central blind hole (78) is formed in the center of the pin from below. The stopper pin support means (80) is provided with a central blind hole (78) of the stopper pin (70). A stopper pin receiving member (80) having a vertical insertion portion (82) that can be inserted from below at 78) and supporting the stopper pin (70) when unlocked.
An ophthalmologic measurement device characterized by comprising: 2. The stopper pin receiving member (80) is substantially L-shaped and further includes a support portion (83) extending from the base (60) and supporting the vertical insertion portion (82) upright. The ophthalmologic measurement apparatus according to claim 1, wherein: 3. The ophthalmologic measuring device according to claim 2, wherein the upper end of the stopper pin is located in the second through hole at the unlock position.