JPH09299328A - Dental ccd camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To project an image taken within the oral cavity onto a TV monitor while rotating the direction of the image and to enable reproduction of the image by detecting the angle by which it was rotated. SOLUTION: A dental CCD camera main body 1 and a side-view lens part 2 are integrated together, and an outer periphery rotating ring 17 is manually rotated so that an inner periphery rotating ring 16 is rotated by a gear 17a formed on the inner periphery of the outer periphery rotating ring 17, a needle gear 14 that meshes with the gear 17a, and a gear 16a formed on the outer periphery of the inner periphery rotating ring 16 which meshes the needle gear 14. Therefore, a CCD element locking plate 11 formed integrally with the inner periphery rotating ring 16 is rotated to rotate a CCD element 6 locked on the CCD element locking plate 11. Further, the angle of rotation is detected by means of an angle graduation 19 indicated on the open end of the outer periphery rotating ring 17.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention provides an image of the inside of the oral cavity for T
Dental CCD camera (hereinafter CCD) projected on V monitor
The present invention relates to a rotation mechanism for rotating an orientation of an observation image and displaying it on a TV monitor.

[0002]

2. Description of the Related Art A conventional CCD camera, as shown in FIG. 8, has a camera body 1 having a CCD element 6 incorporated therein, and a side view lens portion 2a having a prism 4 for guiding incident light and a fiber 5 incorporated therein. In general, the lens unit 2 such as the direct-view lens unit 2b shown in FIG. 9 is selected and connected according to the observation direction in the oral cavity, and the incident light of the observed image is displayed on the TV monitor 9 via the control unit 8. is there. In addition, there is also a type in which the lens unit 2 is integrated with the camera body 1 and the lens unit 2 cannot be replaced.

[0003]

The conventional CCD camera is of a type in which the lens portion 2 is detachable from the camera body 1 as well as the one in which the lens portion 2 is integrated with the camera body 1. Also in the case of the article, as shown in FIG. 10, the connecting portion is provided with the protruding portion 10, and the protruding portion 10 is locked so that the connecting portions are fixed so as not to rotate.

For this reason, for example, as shown in FIG. 11, when alternately observing both side surfaces of the upright image 7 with the side-view lens section 2a, the TV monitor 9 is displayed when the side-view lens section 2a is oriented rightward. If the projected image is an erect image 7a, the image when viewed with the side-view lens unit 2a facing left becomes an inverted image 7b, and the top and bottom are reversed. Also, the left and right are reversed in the images of the upper surface and the lower surface.

By the way, the teeth grow downward from the upper side or downward from the upper side, but when the image is taken with the lens portion of the camera lying sideways in the oral cavity, the image on the TV monitor will show the upper side due to the above phenomenon. The downwardly growing teeth are projected as if they were growing sideways. As a result, there is a problem that it is difficult for a patient who has no knowledge of the CCD camera to understand.

Therefore, the present invention has been made in view of the above problems, and when observing the inside of the oral cavity, in order to facilitate communication with the patient, the direction of the image photographed in the oral cavity is rotated so that the TV is rotated. An object of the present invention is to provide a CCD camera capable of reproducing an image by displaying the image on a monitor and detecting the rotated angle.

[0007]

In order to achieve the above object, a CCD camera of the present invention comprises a camera body having a CCD element and a side-view lens portion integrally formed and built in the camera body. CCD device rotation mechanism,
It is characterized in that a rotation angle detecting means for a CCD element is provided. The rotating mechanism includes a CCD element fixing plate for fixing the CCD element, an inner peripheral rotating ring having a gear formed on the outer peripheral surface of the cylinder and extending to the outer peripheral edge of the CCD element fixing plate, and a gear for the inner peripheral surface. An outer peripheral rotating ring that is formed and fits into the outer diameter of the housing of the camera body, one or more rectangular holes formed in the cylindrical portion of the housing, and a gear on the outer peripheral rotating ring side that is attached to the rectangular hole. And a needle gear that meshes with the gear on the inner peripheral rotation ring side, and a support means that axially supports the needle gear.

Further, the rotation angle detecting means is an angle scale display provided on one opening end of the outer peripheral rotation ring, and C.
It is characterized in that it is made up of the origin of rotation applied to the cylindrical surface of the housing of the D camera body, and the angle at which the CCD element is rotated can be read on the angle scale.

Then, in order to limit the play of the needle gear in the circumferential direction of the housing, the needle gear is fitted into the rectangular hole formed in the housing with the retainers provided on both side surfaces of the needle gear. It is configured to be supported by retainers from both side surfaces. Alternatively, it is characterized in that a shaft is provided at both ends of the needle gear, a bearing is formed in a housing portion corresponding to the shaft, and the needle gear is supported by the bearing.

According to the present invention, the CCD element incorporated in the CCD camera body can be rotated by manually rotating the outer peripheral rotation ring, and the rotation angle can be detected by the angle scale. Further, since the play in the circumferential direction of the housing is minimized by pivotally supporting the needle gear with the retainer or the bearing, the rotation angle can be detected with high accuracy, and the rotation operation can be performed smoothly.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. In each of the embodiments, common points are assigned the same reference numerals and correspond to each other to omit redundant description.

(First Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention. FIG. 1 is a sectional view of a CCD camera, FIG. 2 is a sectional view of a CCD element rotating mechanism, and FIG. 3 is a rotating mechanism. FIG. 4 is an enlarged cross-sectional view of the main part of FIG.

The CCD camera of the present invention, as shown in FIG. 1, has a camera body 1 incorporating a CCD element 6 and a prism 4.
And a lens section 2 having a built-in lens 5 are integrally formed. The photographing light incident from the prism 4 is projected onto the CCD element 6 through the lens 5 and photoelectrically converted there to obtain an electric signal thereof. CCD control circuit 10 via wiring 6a
Is transmitted to the TV monitor 9 from the CCD control circuit 10 via the code 10a and is displayed on the TV monitor 9 as an image.

In the CCD camera having this structure, the CCD
The element 6 is fixed to a disk-shaped CCD element fixing plate 11, and an inner peripheral rotating ring 16 having a gear 16a formed on the outer peripheral surface of the cylinder is extended on the outer peripheral edge of the CCD element fixing plate 11.

In addition, the housing 3 of the camera body 1 has three cylindrical parts.
The individual rectangular holes 13 are formed on the circumference at equal intervals, and on the other hand, the needle gear 14 and the retainer 15 which supports the gear surface from both sides are combined with each other and are inserted into the rectangular holes 13. As a result, the needle gear 14 meshes with the gear 16a of the inner peripheral rotation ring 16, and the play of the needle gear 14 in the circumferential direction of the housing can be minimized by the retainer 15.

The outer peripheral rotary ring 17 (FIG. 3) has a gear 17a formed on the inner peripheral surface thereof, and the gear 17a meshes with the needle gear 14 when fitted to the outer periphery of the housing 3 of the camera body 1. Is configured as follows. As shown in FIG. 4, a taper 18 is formed in the vicinity of one opening of the outer peripheral rotation ring 17, an angle scale 19 is provided on the surface of the taper 18, and a rotation origin display 20 is provided on the housing 3 side. The rotation angle of the CCD element 6 can be read by both of them.

Further, the inner peripheral rotating ring 16 (FIG. 1).
An S-shaped guide portion 21 that limits the rotatable angle of the inner peripheral rotation ring 16 is formed at the open end of the cylindrical portion. On the other hand, a stopper 23 that is pressed against the S-shaped guide portion 21 side by a spring 22 is fixed to the inner diameter of the housing 3, and the stopper 23 is guided by the S-shaped guide portion 21 as the inner peripheral rotation ring 16 rotates. While being moved, the rotation angle is limited within the range of 360 ° by the start point 23a and the end point 23b of the rotation. This prevents the wiring 6a from being excessively twisted.

In this case, the spring 22 has the S-shaped guide portion 21.
The pressing force for pressing is received by the thrust bearing 24 provided on the surface of the CCD fixing plate 11 to facilitate rotation. Further, a ring 25 is provided on the outer periphery of the inner peripheral rotation ring 16 near the open end, and the ring 25 is inserted between the ring 25 and the housing 3 to prevent foreign matter from entering the CCD element 6 side. To prevent.

In the CCD camera having this structure, when the inside of the oral cavity is photographed, the outer peripheral rotation ring 17 mounted on the outer periphery of the casing 3 of the CCD camera body 1 is manually rotated to the left or right, whereby the inner periphery of the outer peripheral rotation ring 17 is rotated. Gear 17a formed on
The CCD element 6 attached to the CCD element fixing plate 11 is rotated by rotating the needle gear 14 meshing with each other and further rotating the inner peripheral rotating ring 16 meshing with the needle gear 14. The CCD element 6
The direction of rotation of is opposite to the direction of rotation of the outer peripheral rotation ring 17.

During rotation of the inner peripheral rotating ring 16, the stopper 23 moves while being guided by the S-shaped guide portion 21 formed at the open end of the inner peripheral rotating ring 16 and comes into contact with the starting point 23a or the end point 23b. Orbiting ring 1
The rotation range of 6 is limited to the range of 360 °. Also,
The rotated angle can be read by the origin 0 provided on the housing side and the angle scale provided on the open end of the outer peripheral rotation ring 17.

According to the present embodiment, the outer peripheral rotating ring 1
It is possible to rotate the built-in CCD element in any direction simply by rotating 7 to the left or right by hand. Further, the rotation angle can be detected by the angle scale provided on the outer peripheral rotation ring 17 and the origin 0 provided on the housing side.

(Embodiment 2) FIGS. 5 to 7 show Embodiment 2 of the present invention, FIG. 5 is a front view of a needle gear having a shaft, and FIG. 6 is a view showing a state in which the shaft is supported by a bearing. FIG. 7 is a sectional view of the main part of the rotating mechanism.

In this embodiment, the retainer 15 for pivotally supporting the needle gear 14 in the first embodiment is used.
In place of the above, the shafts 31 and 32 are integrally extended at both ends of the needle gear 30 as shown in FIG.
Bearings 33a and 33b are formed at both ends of the rectangular hole 13 opened in the housing 3 shown in FIGS. 6 and 7, and the shafts 31 and 32 of the needle gear 30 are supported by the bearings 33a and 33b. The other configuration is the same as that of the first embodiment.

As shown in FIG. 6, the bearing portions 33a and 33b are arranged at equal positions on the circumference of the housing 3 at three locations, and at least the shaft 31 is provided.
And 32, and the shafts 31 and 32 are press-molded into a shape having a depth sufficient to support the length of the shafts 31 and 32, while the rectangular hole 13 into which the needle gear 30 is inserted has a width W (FIG. 5). Allows the diameter of the needle gear 30 to be loosely fitted, and the length thereof is opened to a shape having a gap such that the needle gear 30 can rotate.

Bearing portions 33a, 33 formed as described above
When the shafts 31 and 32 of the needle gear 30 are rotatably supported by b, as shown in the sectional view of FIG.
The axial position of the needle 3 is determined by the rectangular hole, and the circumferential position of the housing 3 is determined by the bearing portions 33a and 33b. The gears 16a and 17a are properly meshed with each other, and the gears 16a and 17a can rotate smoothly without shifting in the circumferential direction of the housing 3.

[0026]

According to the present invention, the built-in CCD element can be rotated with the body of the CCD camera and the lens portion integrally formed. As a result, the photographed image can be turned to an arbitrary angle and displayed on the TV monitor. Further, the image can be rotated in the forward and reverse directions, and the rotated angle can be detected by an angle scale. Further, since the needle gear is supported by the bearing on the housing side, the rotation angle can be detected with high accuracy. Further, the image can be reproduced by setting the CCD camera in advance at the detected angle and photographing. As described above, the image can be rotated to an easy-to-view angle so that it can be seen by the patient, which facilitates communication with the patient.

[Brief description of drawings]

FIG. 1 is a sectional view of a CCD camera showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a CCD element rotating mechanism.

FIG. 3 is an enlarged sectional view of a main part of a rotating mechanism.

FIG. 4 is a view showing an angle scale.

FIG. 5 is a front view of a needle gear having a shaft according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a state in which a shaft is supported by a bearing.

FIG. 7 is a sectional view of a main part of a rotating mechanism.

FIG. 8 is a schematic sectional view of a conventional CCD camera.

FIG. 9 is a cross-sectional view of a direct-view lens unit.

FIG. 10 is a view showing fixing of a connecting portion between the camera body and the side-view lens portion.

FIG. 11 is a diagram showing a relationship between an observation angle by a CCD camera and an image angle.

[Explanation of symbols]

 1 camera body 2 lens part 3 housing 4 prism 5 lens 6 CCD element 7 upright image 8 CCD control circuit 9 TV monitor 10 protrusion 11 CCD element fixing plate 12 thrust bearing 13 rectangular hole 14,30 needle gear 15 retainer 16 inside Circumferential rotation ring 17 Peripheral rotation ring 18 Taper 19 Angle scale 20 Origin indication 21 S-shaped guide part 22 Spring 23 Stopper 24 Thrust bearing 25 Ring 260 ring 31, 32 Shaft part 33 Bearing part

Claims (5)

[Claims] 1. A dentistry characterized in that a camera body containing a CCD element and a side-view lens section are integrally configured, and a CCD element rotation mechanism and a CCD element rotation angle detecting means are provided. CCD camera for. 2. The rotating mechanism comprises a fixed plate of a CCD element built into a camera body, an inner peripheral rotating ring that forms a gear on the outer peripheral surface of the cylinder and extends on the outer peripheral edge of the CCD element fixed plate, and an inner peripheral surface. A ring is formed on the surface and fits to the outer diameter of the housing of the camera body, one or more rectangular holes formed in the cylindrical portion of the housing of the camera body, and the rectangular hole. 2. The dental CCD camera according to claim 1, comprising a needle gear that meshes with a gear on the outer peripheral rotation ring side and a gear on the inner peripheral rotation ring side, and a support means for axially supporting the needle gear. 3. The rotation angle detecting means is an angle scale display provided on one opening end of the outer peripheral rotation ring, and a CCD.
2. The dental CCD camera according to claim 1, further comprising an origin display of rotation applied to the cylindrical surface of the housing of the camera body. 4. The dental CCD according to claim 2, wherein the means for supporting the needle gear in the rotating mechanism is a retainer for supporting the outer peripheral surface of the needle gear.
camera. 5. The dental CC according to claim 2, wherein the means for supporting the needle gear in the rotating mechanism is a bearing formed on the shaft of the needle gear and on the housing side.
D camera.