JPH0368699B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an arm for a surgical light that can automatically return to a standby position.

Conventionally, in treatment units used for dental treatment, the dental treatment chair has a structure that uses hydraulic cylinders etc. to raise, lower, raise and recline the backrest with a single switch operation, but the surgical light does not require a switch operation. Since there is no mechanism to activate the operating light, the operator (dentist) must first turn off the operating light when completing patient treatment, stand up and move the operating light away, and then turn on the reset switch to return to the backrest. It was necessary to wake him up and lower the chair. Therefore, if the operator forgot to move the surgical light far away and turned on the reset switch, there was a risk that the patient would collide with the surgical light.

As a result of various studies, the present inventors have found that by incorporating an air cylinder into the arm of a surgical light, the surgical light can automatically return to its standby position in conjunction with the chair reset immediately after dental treatment is completed, without colliding with the patient. The present invention was completed by discovering that it is possible to manufacture an arm for a surgical light that can be moved manually to a desired position in the same way as in the past.

That is, the present invention is an arm that supports a surgical light attached to a dental treatment unit, and includes an arm connecting member that is pivotally connected to the tip of a rotary arm that is rotatable in the horizontal direction, and an arm connecting member that is horizontally rotatable. an arm body whose one end is pivotally connected to the arm connecting member so as to be rotatable in the direction; and a lamp pivotally connected to the end of the arm body on the side opposite to the arm connecting member so as to be freely rotatable in the vertical direction. a connecting member; and a lamp body supporting member which is pivotally attached to the lamp connecting member so as to be freely rotatable in the horizontal direction, and which supports the lamp body at an end opposite to the pivoting portion thereof so as to be freely rotatable in the vertical direction. The arm body includes a connecting member whose one end is pivotally connected to the arm connecting member so as to be rotatable in the vertical direction, and a connecting member which is fixed to the arm body and comes into contact with the connecting member. A brake piece is wound around the connecting member between the brake piece and a stopper fixed to the connecting member, and is further compressed when the arm body is rotated downward. To provide an arm for a surgical light, characterized in that a compression coil spring is installed therein, and an air cylinder having a cylinder fixed to the arm body and whose piston rod moves the connecting member in a direction in which the compression coil spring is pulled. It is something to do.

EMBODIMENT OF THE INVENTION Hereinafter, the arm for a surgical light according to the present invention will be further explained based on the embodiment shown in the drawings.

FIG. 1 is a perspective view showing the appearance of one embodiment of a surgical light using an arm for a surgical light according to the present invention, and FIGS. 2A, B, and C are respective arms for a surgical light used in the surgical light shown in FIG. 1. A plan view, a front cross-sectional view, and a cross-sectional view showing a state in the middle of return of one embodiment of the invention, FIG. 2D is an enlarged cross-sectional view taken along line a-a in FIG. 2A, and FIGS. FIG. 4 is a sectional view of another embodiment corresponding to FIGS. 2B and D; FIG.
This figure is an electrical circuit diagram of one embodiment in which the solenoid valve shown in FIG. 4 is incorporated into the operation circuit of a dental treatment chair.

In the drawing, reference numeral 1 denotes a horizontally rotatable rotary arm attached to the dental treatment unit, and in the illustrated embodiment, it is horizontally attached to a pole 1a protruding from the dental treatment unit (not shown). has been done. In this structure, the rotary arm 1 is rotatably attached to the pole 1a, and the rotary arm 1 is fixed to the pole 1a and the pole 1a is rotatably attached to the dental treatment unit. There is. Reference numeral 2 denotes an arm connecting member which is pivotally attached to the tip of the rotary arm 1 so as to be horizontally rotatable; 3 is a rectangular tubular arm body whose one end is pivotally attached to the arm connecting member 2 so as to be freely rotatable in the vertical direction; Reference numeral 4 denotes a lamp connection member which is pivotally connected to the end of the arm body 3 on the side opposite to the arm connection member 2 side so as to be freely rotatable in the vertical direction; and 5 is a lamp connection member which is pivotally connected to the lamp connection member 4 so as to be freely rotatable in the horizontal direction. A lamp body 6 is supported rotatably in the vertical direction at the end of the lamp body support member 5 opposite to the pivoting part with the lamp connection member 4. This is a handle attached to the lamp body 6. Reference numeral 7 designates a connecting member whose one end is pivotally connected to the arm connecting member 2 in the arm body 3 so as to be rotatable in the vertical direction; in the illustrated embodiment, the connecting member 7 is not pivotally connected to the arm connecting member 2. The end portion is pivotally connected to the lamp connecting member 4 so as to be freely rotatable in the vertical direction. Reference numeral 8 designates a brake piece that is fixed within the arm body 3 and that comes into contact with the connecting member 7 to suppress movement of the connecting member 7. Reference numeral 9 represents a stopper that is fixed to the connecting member 7. As shown, if the pivoting position of the connecting member 7 to the arm connecting member 2 is lower than the pivoting position of the arm body 3 to the arm connecting member 2, the stopper 9 is closer to the arm connecting member 2 than the brake piece 8. As shown in FIG. 3A, if the pivoting position of the connecting member 7 to the arm connecting member 2 is above the pivoting position of the arm body 3 to the arm connecting member 2, the brake piece 8 It needs to be closer to the arm connecting member 2 than the stopper 9. A compression coil spring 10 is wound around the connecting member 7 between the brake piece 8 and the stopper 9, and is further compressed when the arm body 3 is rotated downward.
1, a cylinder 11a is fixed to the arm body 3, and a piston rod 11b is a compression coil spring 10.
This is an air cylinder that moves the connecting member 7 in the pulling direction of the cylinder 11.
In the case of a type that automatically returns to the initial position using a built-in spring, the piston rod 11
A certain distance is required between the tip of the piston rod 11b and the abutting portion of the piston rod 11b of the connecting member 7. The reason why the air cylinder 11 is used as the cylinder installed inside the arm body 3 is that there is no risk of contamination due to oil leaks like with an oil cylinder, and because compressed air is used for other equipment in dental clinics. This is because the compressed air can be used easily and the movement is smooth.

Next, the operation of the arm of the surgical light according to the present invention having the above structure will be explained.

First, to explain the case of manually moving the surgical light, if you grasp the handle 6a attached to the lamp body 6 and apply force, it will move to the arm body 3 via the lamp connection member 4 attached to the lamp body 6. If a force is applied to the connecting member 7 and the force is greater than the braking force exerted by the brake piece 8 on the connecting member 7, the connecting member 7 becomes movable relative to the arm body 3, and the arm body 3 is moved in the vertical direction relative to the arm connecting member 2. When the lamp body 6 is released, the weight of the lamp body 6 etc. is supported by the compression force of the compression coil spring 10 and the braking force of the brake piece 8, so that the lamp body remains balanced. At this time, if the air cylinder 11 is of a type in which the piston rod 11b returns to the initial position by a spring built into the cylinder 11a, the piston rod 1
The tip of 1b is the piston rod 11b of the connecting member 7
The arm body 3 can be moved vertically relative to the arm connecting member 2 without contacting the abutting portion of the air cylinder 11, and the air cylinder 11 is of a type that does not automatically return to the initial position. In this case, even if the tip of the piston rod 11b is connected to the connecting member 7, if the air flow path communicating with the air cylinder 11 is open to the atmosphere, the arm body 3 will not be affected by the air cylinder 11. It can be moved vertically with respect to the arm connecting member 2 without any movement. In addition, in order to automatically return the operating light to the standby position using compressed air, the compressed air supplied from the compressed air source (not shown) attached to the dental treatment unit can be turned on and off via an electric switch as shown in Figure 4. If this is done by operating the electromagnetic valve shown in FIG. 2C, the air cylinder 11 will operate as shown in FIG.
b, the connecting member 7 moves relative to the arm main body 3, and the arm main body 3 rotates upward relative to the arm connecting member 2, returning to the standby position. In this way, the surgical light can be moved far away to its initial standby position with a single switch operation, and the surgical light arm can also be connected to the electric circuit for operating the dental treatment chair, as shown in Figure 5. By incorporating an electromagnetic valve or the like to reset the dental treatment chair, the surgical light can be reset at the same time as the dental treatment chair without the operator having to stand up with a single reset switch operation, thereby ensuring patient safety.

In Fig. 5, 〓 is a push button switch, □R is a relay operating coil, 〓 is a normally open contact, 〓 is a normally closed relay contact, 〓 is a micro switch that regulates the chair's movable range, and SV _{1 to 4} are The SV 5 is a solenoid valve that controls the supply and discharge of oil to the oil cylinder that moves the chair, and the SV ₅ is a solenoid valve that controls the supply and discharge of air to the air cylinder that moves the operating light arm.
indicates a hydraulic pump, and up, down, up, and down indicate raising and lowering of the dental treatment chair, and raising and lowering the backrest, respectively.

As explained above, although the surgical light arm according to the present invention has a simple structure, it can ensure patient safety, simplify the operator's flow line, and reduce operator fatigue. , which has great value in dental treatment.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the appearance of one embodiment of a surgical light using an arm for a surgical light according to the present invention, and FIGS. 2A, B, and C each show an arm for a surgical light used in the surgical light shown in FIG. 1. A plan view, a front cross-sectional view, and a cross-sectional view showing a state in the middle of return of one embodiment of the invention, FIG. 2D is an enlarged cross-sectional view taken along line a-a in FIG. 2A, and FIGS. FIG. 4 is a sectional view of another embodiment corresponding to FIGS. 2B and D; FIG.
This figure is an electrical circuit diagram of one embodiment in which the solenoid valve shown in FIG. 4 is incorporated into the operation circuit of a dental treatment chair. DESCRIPTION OF SYMBOLS 1...Rotating arm, 1a...Pole, 2...Arm connection member, 3...Arm body, 4...Lamp connection member, 5...Lamp body support member, 6...Lamp body, 6a...Handle, 7... Connection member, 8...
... Brake piece, 9 ... Stopper, 10 ... Compression coil spring, 11 ... Air cylinder, 1
1a...Cylinder, 11b...Piston rod.

Claims (1)

[Scope of Claims] 1. An arm connecting member which is an arm that supports a surgical light attached to a dental treatment unit and is pivotally connected to the tip of a rotary arm 1 which is horizontally rotatable. 2, an arm body 3 whose one end is pivotally attached to the arm connecting member 2 so as to be freely rotatable in the vertical direction, and an arm body 3 having one end pivotally attached to the arm connecting member 2 so as to be rotatable in the vertical direction; The lamp connecting member 4 is pivotably attached to the lamp connecting member 4 so as to be freely rotatable in the horizontal direction, and the lamp body 6 is supported rotatably in the vertical direction at the end opposite to the pivoting portion. Lamp body support member 5
Inside the arm body 3, there is a connecting member 7 whose one end is pivotally attached to the arm connecting member 2 so as to be rotatable in the vertical direction, and a connecting member 7 which is fixed to the arm body 3 and abuts on the connecting member 7. A brake piece 8 that controls the movement of the connecting member 7, and a brake piece 8 that is wrapped around the connecting member 7 between a stopper 9 fixed to the connecting member 7 and the brake piece 8, and causes the arm body 3 to rotate downward. A compression coil spring 10 that is further compressed when the arm body 3 is compressed, and an air cylinder 11 that has a cylinder 11a fixed to the arm body 3 and whose piston rod 11b moves the connecting member 7 in the direction in which the compression coil spring 10 is pulled are installed inside. An arm for a surgical light that is characterized by: 2 The pivoting position of the connecting member 7 to the arm connecting member 2 is lower than the pivoting position of the arm body 3 to the arm connecting member 2, and the stopper 9 is connected to the brake piece 8.
An arm for a surgical light according to claim 1, which is located closer to the arm connecting member 2. 3 The position where the connecting member 7 is pivotally attached to the arm connecting member 2 is above the position where the arm main body 3 is pivotally attached to the arm connecting member 2, and the brake piece 8 is connected to the stopper 9.
An arm for a surgical light according to claim 1, which is located closer to the arm connecting member 2. 4 Air cylinder 11 is moved to piston rod 11b by the spring built into cylinder 11a.
An arm for a surgical light according to claim 2 or 3, which is an air cylinder of a type in which the arm automatically returns to its initial position. 5. The surgical light arm according to claim 2 or 3, wherein the air cylinder 11 is of a type that does not automatically return to its initial position.