JPH0311779B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dental light, and more particularly to a dental light in which the position and angle of depression of the light portion are controlled and adjusted.

(Prior Art and Problems to be Solved by the Invention) Conventional dental lights are configured with a light section supported at the tip of one to three stages of support arms, etc. (or vice versa), the actual situation is that the operator grasps the light part attached to the end of the arm with his hand and moves it up and down or left and right to adjust its position and direction. .

(Means for Solving the Problems) The present invention provides a dental light in which the position and angle of the light section can be automatically moved according to the amount of inclination of the back frame of the treatment table. , that is, a support stand, a freely extendable slide shaft held by the support stand,
A slide shaft support drive section provided with a freely adjustable angle, a light section provided at the tip of the slide shaft, a device for finely adjusting the angle of depression of the light section, and a slide shaft supporting drive section that is provided in a manner that allows the angle to be freely adjusted. , comprising a control mechanism for moving the light section back and forth by a distance corresponding to the distance of movement of the back frame when the back frame is raised and tilted, and a control mechanism for finely adjusting the depression angle direction of the light section. This is a dental light with special features.

(Embodiment) An embodiment of the present invention will be described in detail with reference to the accompanying drawings. In FIG. The direction and position of the slide shaft 3, which is fitted into the slide shaft 3, and the light section 4 attached to its tip are first determined based on the patient's body shape and other factors prior to the examination.

Since the angle between the pole 1 and the slide shaft 3 is generally fixed in advance, the position of the light section can be changed by changing the amount of extension of the slide shaft 3 (in the direction of the arrow in the figure). Further, the depression angle of the light section 4 is also adjusted, and as described below, the light section 4 may be connected to the slide shaft 3 by a ball joint 5, for example.

In this way, once the position of the light is set, the amount of backward movement of the oral cavity (indicated by the dotted line in the figure) can be detected and adjusted accordingly, even when changing from a standing position to a sitting position as shown in the figure. By moving the slide shaft forward by a corresponding amount, the distance between the oral cavity and the light section can be kept substantially constant. Note that the moving direction of the light section 4 as the slide shaft is extended is the extension line of movement of the oral cavity when the back frame is erected (or tilted) (considered to be a substantially straight line), as will be described later. It is preferable that the light part is always in front of the oral cavity.

By the way, when changing from a standing position to a seated position, the back frame 6 is tilted to the position shown by the reference numeral 6', and the switch 7 provided on the side of the back frame 6 is operated as shown in the figure. Let's do it. Therefore, the slide shaft driving section is driven in conjunction with the switch, and the slide shaft is advanced by an amount synchronized with the above-mentioned movement amount.

In the illustrated example, the maximum inclination L of the back frame is about 80 degrees, and the length is about 490 mm, so if the slide shaft is moved forward by the same distance, the light part and the oral cavity will be separated. The distance will be kept constant. Note that the time required for tilting at this time is generally about 7 seconds.

Therefore, if the moving speed of the back frame when tilting and the feeding speed of the slide shaft are set to be the same in advance, the feeding amount can be controlled over time. In other words, the slide shaft only needs to be driven for about 7 seconds.

FIG. 2 shows an example of a shaft feeding mechanism, in which a rack gear 8 is provided at the rear end of the slide shaft, and a pinion gear 10 connected to a forward/reverse motor 9 meshes with this rack gear. The forward/reverse motor is energized to advance the slide shaft by an amount responsive to the above-mentioned amount of inclination. For example, if you use a gear with a motor rotation speed of 1,400 RPM and a pitch of 3 mm, it will move 70 mm in 1 second, and therefore 490 mm in 7 seconds. In other words, in the case of adopting the above configuration, the aforementioned moving speed of the back frame and the feeding speed of the slide shaft when the back frame is raised and tilted are the same, so it is only necessary to use a common switch, and the response is improved. This is preferable because it also simplifies the configuration.

Since the detection of back frame movement amount, motor control, and other specific control mechanisms are already well known in the art, further explanation will be omitted for the sake of brevity.

FIG. 3 is an enlarged partial sectional view of the tip of the slide shaft 3, and shows a specific example equipped with a fine adjustment device that allows remote control of the left, right, top, and bottom directions (depression angle direction) of the light section using only a switch.

The drive cam 11 connected to the motor M is eccentric, and due to this eccentric movement, the ball joint 5
The light section 4 supported by the can change its direction vertically and horizontally over the range shown by the arrow in the figure (crossing between the positions shown by the broken lines).

The motor M may be controlled by the aforementioned switch 7, in which case the operator can adjust the position of the back arm and the position and direction (depression angle direction) of the light section simply by operating the switch 7.

(Effects of the Invention) As described above, according to the present invention, when the back frame is raised or tilted, the position of the light section is always automatically adjusted in response to the amount of movement thereof, and the direction of the depression angle of the light section is also finely adjusted. Since it is adjustable, the surgeon does not have to reach out and adjust the position and direction of the light section, which saves time and allows him to concentrate on treatment.

Furthermore, when a patient who comes to the hospital sits on or leaves the treatment table or gargles, there is no risk of the patient's head hitting the light section, and safety can be maintained.

[Brief explanation of drawings]

Figure 1 is a schematic inclined view of a dental treatment table explaining the mounting position of the dental light, Figure 2 is a simplified inclined view showing the drive mechanism of the slide shaft drive section, and Figure 3 is the depression angle adjustment of the slide shaft tip. A partial cross-sectional view showing a possible mounting state of the light part is shown. 1: Support stand, 2: Slide shaft support drive section, 3: Slide shaft, 4: Light section,
5: Ball joint, 6: Back frame,
7: Switch, 8: Rack gear, 9: Forward/reverse motor, 10: Pinion gear, 11: Drive cam.

Claims (1)

[Claims] 1. A support stand, a slide shaft held by the support stand that can be freely extended, a slide shaft support drive section that is provided so as to be able to adjust its angle, a light section provided at the tip of the slide shaft, and a direction of depression of the light section. a fine adjustment device, and a control mechanism for moving the light section back and forth by a distance corresponding to the distance of movement of the back frame when the back frame is raised and tilted in response to the amount of inclination of the back frame of the treatment table; A dental light comprising: a control mechanism for finely adjusting the direction of depression of the light section.