JPS6247121Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a focal point moving device that is made by aligning the optical axes of each lamp in a sealed surgical lamp used primarily for medical purposes.

The present inventor combined a screw gear and a bevel gear as a device to move the focal point of a closed-type multi-lamp surgical light to an arbitrary position without scattering the focal state, and utilized the rotational force of the knob from outside the system. We have already proposed a device with a mechanism that transmits forward and backward movement to function as a ramp incline (Special Publication No. 54-5637).

This device can move the focal point created by aligning the optical axes of all lights to the desired focal depth position by simply rotating the knob, and has practical advantages such as being structurally easy to maintain and inspect. However, when changing the depth of focus position significantly, the knob must be rotated many times, making it difficult to operate quickly, and because a complicated gear mechanism is involved,
There were problems such as difficulty in correcting errors during manufacturing and assembly, and manufacturing costs were somewhat high.

This invention solves the above-mentioned problems and provides a focus moving device for a closed-type surgical light that is equipped with a simple mechanism that can move the focus position extremely quickly with a one-touch operation and easily correct errors. Something,
Four closed lamp houses each containing individual lamps and in which a focal point is created by aligning the optical axes of these lamps at a desired depth are connected by a pipe connected on the same circumference around the axis of movement of the focal point. In the focal point moving device for a closed surgical light, each of the lamps is pivotally mounted at both ends in the lamp house via a rotating shaft via a mounting piece, and the focal point moving axis direction of each lamp is A tilting arm extending in the direction of the optical axis of the lamp is fixed to one of the rotating shafts, and the connecting pipe is attached to the tilting arm. A connector provided at the other end of a universal joint that can be expanded and fixed is connected at one end to an operating rod that is movably provided inside the connecting pipe. The periphery of a flange in a connecting pipe, which can be rotated by an operating piece such as a rotary knob, is pivotally connected to each operating rod by a link, and the operating rod is moved forward and backward by rotation of the operating piece. It is characterized by:

Hereinafter, one embodiment of the focus moving device for a closed surgical light according to this invention will be described based on the drawings.

Figure 1 is an installation diagram of a sealed surgical light, in which 1 is a rotary arm rotatably attached to a ceiling wall 3 using a fixture 2, and 4 is a 4-lamp sealed type that stores one lamp each. It is a type lamp house.

Each lamp house 4 is arranged by connecting pipes 7a and 7b which are rotatably and tiltably provided via a hanging arm 5 rotatably provided at the tip of the rotary arm 1 and an automatic balancer 6. ,
As shown in FIGS. 1 and 2, each lamp house 4 has the same circumference c around the movement axis b of the focal point F, which is created by aligning the optical axes a of each lamp 11.
A branch connection pipe 7b is disposed above the connection pipe 7b.

The inside of each lamp house 4 is shown in Figures 3 and 4.
It has the structure shown in the figure. That is, each ring-shaped lamp holder 8 in the lamp house 4 is fixed at each end in a perpendicular direction to a radial line d connecting the focus movement axis b and the center of each lamp holder 8 in FIG. The lamp holder 8 is attached to the inner surface of the lamp house 4 via a mounting piece 10 so as to be tiltable in the direction of the focus movement axis b by the rotation shaft 9, and a lamp 11 is fixed to the center of each lamp holder 8.

The lower end of a tilting arm 12 for tilting the lamp holder 8 and the lamp 11 is fixed to one side of each pair of rotating shafts 9 fixed to each lamp holder 8, and the upper part 12a of the tilting arm 12 is fixed to one of the pair of rotating shafts 9 fixed to each lamp holder 8. 11 is formed parallel to the optical axis a.

A connecting tool 15 at the other end of the universal joint 14, whose one end is connected to the operating rod 13 loosely inserted from the branch connecting pipe 7b, is connected to the upper side 12a of the tilting arm 12 by loosening the screw 23. It is fixed by tightening so that it can be tilted and moved up and down.

As shown in FIG.
It is configured to be expandable and retractable by a fixing means such as 7.

The connection between the operating rod 13, the universal joint 14 and the tilting arm 12 can be applied not only to a bending connection as shown in the third figure but also to an orthogonal connection.

One end of the operating rod 13 is inserted into each lamp house 4, and the other end of the operating rod 13, to which a universal joint 14 etc. is connected, is used to drive these in conjunction with each other within the connecting pipes 7a and 7b. Connected to the forward/backward transmission mechanism.

FIG. 6 shows an example of a forward/backward transmission mechanism, which is rotatably inserted into a central connecting pipe 7a located at the center, and includes a rotation knob 19 screwed onto the outer end of the central connecting pipe 7a. Core axis 20
and the central connecting pipe 7a and each branch connecting pipe 7b.
It consists of a pair of flanges 18 fixed to the main shaft 20 within the intersection with the main shaft 20, and four links 21 each having one end pivoted around the periphery of each flange 18 by a pivot shaft 24. The other end of 21 is pivotally connected to each operating rod 13 by a pivot shaft 25 within the branch connecting pipe 7b communicating with each lamp house 4.

Next, a method for moving the focal point F, which is created by aligning the optical axes a of the lamps 11 according to this embodiment, along the focal point movement axis b will be explained together with the operation of each mechanical part.

Now, as shown in the sixth diagram, the opposing link 21
When the rotary knob 19 is rotated to the right or left while the rotation knobs 19 are positioned on a straight line, both flanges 18 fixed to the main shaft 20 also rotate in the same direction, and this rotation is transmitted through each crankshaft 21 to each operation. A movement is made to pull the rod 13.

When each actuating rod 13 is drawn, its stroke is applied to each tilting arm 12 via each universal joint 14 as a rotational force that opens the optical axis a of each lamp 11 outward about its respective rotation axis 9. communicated.

Therefore, the focal point F created by aligning the optical axes a of each lamp 11 moves down along the focal point movement axis b by an amount corresponding to the amount of rotation of the rotary knob 19, that is, the tilt angle of each lamp 11. I will do it. Also,
When the rotating nozzle 19 is returned to its original position with the focal point F being lowered in this way, that is, when the opposing links 21 are rotated in a direction in which they are positioned on a straight line, the focal point F will rise.

In addition, the forward and backward stroke of the operating rod 13 and the ramp 1
The relationship with the tilting angle of No. 1 can be determined by changing the fixing angle and fixing height of the connector 15 of the universal joint 14 with respect to the upper part 12a of the tilting arm 12, and by changing the length of the universal joint 14 itself. Adjustments will be made as appropriate.

Since this invention has the above-mentioned configuration and functions, it goes without saying that the focal point of the closed surgical light can be effectively moved by a simple one-touch operation using the rotary knob without moving the lamp house up or down. The drive mechanism is provided by flanges, links, universal joints, and tilting arms, so it can be manufactured at a lower cost than conventional gear mechanism structures, and it can be operated quickly and smoothly without any operational errors. I can do it.

Furthermore, the relationship between the forward/backward stroke applied to the operating rod and the ramp tilting angle can be determined by changing the fixed height and fixed angle of the universal joint connector with respect to the tilting arm, or by changing the length by expanding and contracting the shaft of the universal joint. In addition, error correction for aligning the optical axes of each lamp during manufacturing and assembly can be done by making the same adjustments as above not only before and after the installation of the closed surgical light. Unique practical effects are brought about, such as being able to be carried out effectively and ensuring highly accurate focus adjustment at all times.

[Brief explanation of the drawing]

The drawings show an embodiment of the focus moving device for a closed-type surgical light according to this invention. Figure 1 shows the installation state of the closed-type surgical light, and Figure 2 shows the arrangement of the connecting pipe and the lamp house. Explanatory drawings, Fig. 3 is a plan view showing the internal mechanism of each lamp house, Fig. 4 is a partial side view of Fig. 3, Fig. 5 is an enlarged explanatory view of the universal joint, and Fig. 6 is a forward/backward transmission. It is a sectional view showing a mechanism part. 4... Lamp house, 7a... Central connecting pipe (connecting pipe), 7b... Branch connecting pipe (connecting pipe), 8... Lamp holder, 9... Rotating shaft, 10...
Mounting piece, 11...Lamp, 12...Tilting arm, 13
...Operating rod, 14...Universal joint, 15
... Connector, 18... Flange, 19... Rotation knob (operation piece), 21... Link, a... Optical axis, b... Focus movement axis, c... Same circumference, F... Focus.

Claims (1)

[Scope of utility model registration request] Four closed lamp houses each containing individual lamps and in which a focal point is created by aligning the optical axes of these lamps at a desired depth are connected by a pipe connected on the same circumference around the axis of movement of the focal point. In the focus moving device for a closed surgical light, each of the lamps is pivotally mounted at both ends in the lamp house via a rotating shaft via a mounting piece, and the focal point moving axis direction of each lamp is A tilting arm extending in the direction of the optical axis of the lamp is fixed to one of the rotating shafts, and the connecting pipe is attached to the tilting arm. A connector provided at the other end of a telescopic universal joint is connected at one end to an operating rod movably provided inside the pipe, and a connecting tool provided at the other end of the universal joint is movably fixed. The periphery of a flange in a connecting pipe, which can be rotated by an operating piece such as a rotary knob, is pivotally connected to each operating rod by a link, and the operating rod is moved forward and backward by rotation of the operating piece. A focus moving device for a closed surgical light featuring: