JPH04176437A - Object device for dental magnifiction observer - Google Patents

Abstract

PURPOSE:To prevent cross infection more effectively by fitting an arm part into a fitting hole formed at the tip of an exchange unit while a reflection mirror is mounted on the exchange unit to allow versatile observation. CONSTITUTION:An exchange unit 3 is connected to an object device body 2 by screwing a thread part 15 of the exchange unit 3 to allow observation at various magnifying powers. A base end of a secondary optical fiber bundle 25 is so as exposed to be flush with a connection surface 28 of a cover material 22 as butted end face 30 corresponding to the butted end face 20 of a primary optical fiber bundle 10 and the fiber is divided into two bundles on the side of the other tip to let tips thereof serve as irradiation end faces 32 and 32 respectively. The irradiation end faces 32 and 32 are exposed to a front end face 29 of a lid member 23 on the tip side in such a manner as to sandwich a fitting hole 36. An arm part 33 of a reflection mirror 4 has a fitting part 35. The fitting part is fitted into a fitting hole 36 of the exchange unit 3 to connect the reflection mirror 4 to the exchange unit 3 thereby achieving a prevention of cross infection.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention consists of an observation device main body and an objective tool, and displays an enlarged image of an observation region taken by the objective tool facing into the oral cavity on a display of the observation device main body. The present invention relates to an objective tool for a dental magnifying observation device that displays images for observation.

[Conventional technology]

Examples of magnifying observation devices that display an image captured by an objective on the main body of the observation device for observation include Japanese Patent Application Laid-Open No. 1-308527, Japanese Patent Application No. 1-26462, and Japanese Patent Application No. 1-273419. There is something to be disclosed.

This magnifying observation device consists of an objective tool and an observation device main body, and the objective tool is brought to the side of the object to be observed, the image is taken, and this is displayed on the display of the observation device main body for observation. This allows anyone to easily perform observations at magnifications of 50x to several thousand times without requiring any skills or expertise.

[Problem to be solved by the invention]

However, the objective of this magnifying observation device is not necessarily suitable for special observations such as intraoral observation in dentistry.

Therefore, in order to apply such easy magnified observation to dental care, the present invention aims to provide an objective tool more suitable for dental care.

[Means to solve the problem]

Specifically, it consists of an objective main body, an exchange unit that can be brought into contact with and separated from the objective main body, and a reflector that can be brought into contact with and separated from the exchange unit. It has a built-in imaging unit and a primary optical fiber bundle whose butt end face faces the connection surface with the replacement unit for guiding the irradiation light from the external light source. It has a built-in optical unit for magnifying the image of the area to be observed, and receives the irradiation light from the primary optical fiber bundle through the secondary optical fiber bundle whose end face faces the connection surface with the objective body. It is built in to irradiate the light onto a reflecting mirror, and the reflecting mirror consists of an arm part and a mirror surface part inclined at a predetermined angle at the tip of the arm part, and a fitting hole formed in the tip part of the replacement unit. To provide an objective tool for a dental magnifying observation device, which is attached to a replacement unit by fitting an arm part into the objective tool.

[For production]

To observe teeth and gums using this objective, lightly touch the arm of the reflector against the teeth, ensuring stability in maintaining focus, and bring the mirror surface of the reflector close to the desired observation area. . Then, the irradiated light from the secondary optical fiber bundle reflected by the mirror surface illuminates the observation target region, and the irradiated image of the observation target region enters the optical unit via the mirror surface, and then exits from the optical unit. The image is captured by the imaging unit and displayed on the display of the observation device main body.

In addition, with this objective, the exchange unit can be attached to and detached from the objective body, and the reflector can be attached to and detached from the exchange unit, so a new reflector can be replaced for each patient. This allows for effective prevention of cross-infection, and allows observation at different magnifications by using interchangeable units with different magnifications as needed.

[1 case of real family] The present invention will be explained in detail below.

As shown in FIG. 1, the objective 1 includes an objective main body 2, an exchange unit 3, and a reflecting mirror 4.

The objective main body 2 has an imaging unit 9 and a -order optical fiber bundle 10 built into a protection tube 8 whose both ends are closed with lid members 6.7, and a cable 11 from the imaging unit 9 and a -
An externally extending portion of the second optical fiber bundle 10 is extended externally as a connecting cable 12. This objective tool main body 2
As shown in FIG. 5, the lid member 7 on the distal end side has a connecting portion 13 protruding from its front end surface in an eccentric position, and a threaded portion 14 formed on the outer surface of the connecting portion 13 has a threaded portion 14 which will be described later. The exchange unit 3 is connected to the objective tool main body 2 by screwing together the screw portion 15 of the exchange unit 3.

The imaging unit 9 is formed by unitizing a CCD element and other parts in advance for imaging, and its tip portion serves as a fitting portion 18 that fits into a holding cylinder 17 of an optical unit 16, which will be described later, and the aforementioned connecting portion 13. It is made to protrude from the front end surface, that is, the connection surface 19.

The image captured by this imaging unit 9 is transmitted to the cable 11
The data is sent to the main body of the observation device (not shown) via the camera, and displayed on the display there.

The primary optical fiber bundle 10 is for guiding irradiation light from an external light source (not shown), and one end thereof is connected to the front end.

The abutting end surface 20 is exposed so as to be flush with the connection surface 19 described above (FIGS. 3 and 5).

The replacement unit 3 includes an optical unit 16 and a secondary optical fiber bundle 25 in a protective tube 24 whose both ends are closed with lid members 22 and 23.
A screw member 26 is attached to the proximal end of the protective tube 24 so as to be rotatable with respect to the protective tube 24. Connect the threaded part 15 to the threaded part 14 of the connection part 13 of the objective main body 2.
It can be connected to the objective tool main body 2 by screwing it into the main body 2 (FIG. 5). Therefore, observations can be made at various magnifications by replacing and using replacement units 3 that incorporate optical units 16 with different magnifications, and if necessary, replacement units 3 that have been disinfected in advance can be used.
It is possible to replace and use it for each patient.

The optical unit 16 is a set of an objective lens 27 and other lenses (not shown) in a holding tube 17.
The holding tube 17 is assembled into the protection tube 24 so that its base end opens into the connection surface 28 of the lid 22 on the proximal side, and the tip of the holding tube 17 opens into the front end surface 29 of the lid 23 on the tip side.

The secondary optical fiber bundle 25 is for receiving the irradiation light from the -order optical fiber bundle 1O and irradiating it to the observation site via the reflecting mirror 4, and the base end side is a single bundle. The base end is exposed as an abutting end surface 30 corresponding to the abutting end surface 20 of the primary optical fiber bundle 10 so as to be flush with the connecting surface 28 of the lid member 22 (FIG. 5). On the other hand, the tip side is branched into squares, and the tip of each branch bundle 25d, 25d is an irradiation end surface 32.32, and each of the irradiation end surfaces 32
．． 32 is exposed on the front end surface 29 of the lid member 23 on the distal end side so as to sandwich a fitting hole 36 (described later) (FIGS. 2 and 4).

As shown in FIG. 6, the reflecting mirror 4 includes an arm portion 33 and a mirror surface portion 34. The arm portion 33 has a fitting portion 35
By fitting this fitting portion 35 into a fitting hole 36 formed in the lid 23 of the replacement unit 3, the reflecting mirror 4 can be connected to the replacement unit 3. Therefore, the reflector 4 can be replaced with a new one for each patient, and by making the reflector 4 disposable, disinfection work to prevent cross-infection can be omitted, and cross-infection can be prevented. Prevention can also be done more effectively. Further, the mirror surface part 34 is provided in an inclined state taking an angle α with respect to the arm part 33, so that it has an angle α with respect to the optical axis A of the optical unit 16 when attached to the replacement unit 3. .

It is also preferable that this α be around 120°.

In order to observe teeth, gums, etc. in the oral cavity using this objective tool 1, the arms 33 of the reflector 4 are lightly supported by the teeth, and the mirror surface part 34 of the reflector 4 is be brought close to the desired observation site.

Then, the secondary optical fiber bundle 25 reflected by the mirror surface part 34
The irradiation light from the irradiation end face 32.32 illuminates the observation target site, and the image of the irradiated observation target site enters the optical unit 16 via the mirror surface part 34, and the image from the optical unit 16 is captured. The image is captured by the unit 9, displayed on the display of the main body of the observation device, and provided for observation.

〔Effect of the invention〕

As explained above, the objective tool of the dental magnifying observation device according to the present invention is equipped with a reflector that can be easily viewed even in a narrow place such as the inside of the oral cavity. Because it allows you to clearly magnify and observe your gums,
It can greatly contribute to improving dental treatment. In addition, since the exchange unit can be attached to and detached from the objective main body, multifaceted observation is possible by using exchange units with different magnifications interchangeably, and the reflector can be attached to the exchange unit. Since the reflector can be attached and detached at will, and a new reflector can be replaced for each patient, cross-infection can be more effectively prevented.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the objective tool, Fig. 2 is a schematic cross-sectional view of the replacement unit along the arrow ■-■ line in Fig. 1, and Fig. 3 is a schematic cross-sectional view in the direction of the arrow ■ in Fig. 1. Figure 4 is a schematic side view of the tip of the objective tool body viewed from the direction of the arrow ■ in Figure 1. Figure 5 is a schematic side view of the tip of the objective tool body and the replacement unit. and FIG. 6 is a schematic perspective view of the reflecting mirror. 1 --- One objective tool 2 °゛° Objective tool main body 3 --- Replacement unit 4 --- One reflecting mirror 9 --- One imaging unit 10 ゛゛ --- Order optical fiber bundle 16--Optical unit 19--11--Connection surface 20--Abutting end surface 24--1Protection tube 25-1--Secondary optical fiber bundle 28-- - - Connecting surface 29 - - Front end face 30 - - Butt end face 32 - - Irradiation end face 33 - - Arm part 34 - - Mirror surface part Fig. 2

Claims (1)

[Scope of Claims] The objective main body includes a protective tube, a replacement unit that can be brought into contact with and separated from the replacement unit, and a reflector that can be brought into contact with and separated from the replacement unit. It houses an imaging unit and a primary optical fiber bundle whose butt end face faces the connection surface with the replacement unit for guiding the irradiation light from the external light source. It has a built-in optical unit for enlarging the image of the area to be observed, and receives the irradiation light from the primary optical fiber bundle through a secondary optical fiber bundle whose end face faces the connection surface with the objective body. The reflector is made up of an arm part and a mirror surface part tilted at a predetermined angle at the tip of the arm part, and a fitting part formed at the tip part of the replacement unit. An objective tool for a dental magnifying observation device, which is attached to a replacement unit by fitting an arm part into a hole.