JPH058988Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a chair for an operator (including an assistant), which is mainly placed on the side of a dental treatment table.

(Prior Art) In conventional dental treatment systems, a chair with casters is placed on the side of a dental treatment table, and an operator or the like sits on this chair while treating a patient lying on the treatment table. . In this case, since the chair can be moved freely on the floor using casters, it is convenient for the operator to move his body to an appropriate position for treatment while sitting on the chair. In addition, the seat plate of such a surgeon's chair is generally adjustable up and down according to the physique of the surgeon by operating a lock screw.

(Problem to be solved by the invention) However, since the above-mentioned surgeon's chair can be moved in principle, there are times when the surgeon is not in the designated position when performing treatment. This may impair the smoothness of treatment work, or may become an obstacle when patients get on and off the treatment table. In addition, it has been pointed out that in order to adjust the vertical position of the seat plate, it is necessary to loosen the lock screw and move the seat plate up and down by hand each time, which is cumbersome and difficult to adjust to the proper position. Ta.

This invention was made in view of the above circumstances,
It is an object of the present invention to provide a novel operator's chair that is always placed near a treatment table and that allows the user to move the operator's position, adjust the vertical position, and adjust the forward and backward movement while sitting.

(Means for Solving the Problems) The configuration of the present invention for achieving the above object will be explained based on the attached embodiment diagrams. Fig. 1 is an overall perspective view of a dental treatment device showing an application example of the present invention's operator's chair, Fig. 2 is a sectional view taken along the line shown in Fig. 1, and Fig. 3 is a portion showing the main mechanism of the same embodiment. Cutaway perspective view, 4th
6 through 6 are schematic diagrams showing other modifications of the locking mechanism of the forward and backward moving means. That is, the operator's chair of the present invention includes a horizontally rotating support arm 1 whose proximal end is pivotally connected to a base part 11, a column 2 erected at the tip of the arm 1, and an upper end of the column 2. The seat board 3 mounted on the
It includes an extensible means 4 for vertically extending and contracting the seat board 3, a back-and-forth moving means 5 for moving the seat board 3 back and forth with respect to the support column 2, and a foot pedal 6 for locking and unlocking the back-and-forth moving means 5. The support column 2 consists of an inner cylinder 21 that moves up and down and a fixed outer cylinder 22, and the telescopic means 4 and foot pedal 41, including a cylinder body 42, a cylinder rod 43, and a valve stem 44, are housed inside the inner cylinder 21. a damper-type cylinder 40 filled with gas; the foot pedal 41 attached to the circumferential body of the swing arm 1 to move the valve stem 44 up and down; and the inner cylinder 21 that moves up and down in conjunction with the cylinder 42. The longitudinal moving means 5 and the foot pedal 6 are constructed of a sliding plate 51 which is fixed to the upper end of the inner cylinder 21 and has pulleys 511 at both ends, and a sliding plate 51 that extends longitudinally along the lower surface of the seat plate 3. Guide members 52, 52 are fixedly installed to accommodate the pulleys 511 of the sliding plate 51 so as to be slidable back and forth, and the foot pedal 6 attached to the circumferential body of the fixed outer cylinder 22 can be operated. The present invention relates to a surgeon's chair which is configured with a stop pin 62 that moves up and down in conjunction with the stop pin 62 and elastically retracts into locking holes 31 that are spaced back and forth on the lower surface of the seat plate 3.

Preferably, the seat plate 3 is rotatable around the support column 2.

In addition, the means for locking and unlocking the longitudinal movement means 5 includes a working rod 61 that moves up and down by the operation of the foot pedal 6, and a working rod 61 that is connected to the working rod 61 and is spaced apart from the front and back on the lower surface of the seat board 3. A stop pin 62 that elastically protrudes and retracts into the locking hole 31 (second
and FIG. 3), The stop pin 62 and the foot pedal 6 are linked by a connecting wire 63 instead of the action rod 61 (FIG. 4), The stop pin 62 and the foot pedal 6 are connected to the action rod 61. Instead, the stop pin 62 is connected by a liquid-filled tube 64 and configured to move up and down due to the expansion and compression of the sealed liquid as the foot pedal 6 is operated (FIG. 5), and the stop pin 62 is an electromagnet. The foot pedal 6 is surrounded by a coil 65 so as to be movable up and down.
A structure in which the electromagnetic coil 65 is turned on and off by the operation of (FIG. 6) is preferably employed.

(Function) In the operator's chair configured as described above, when the operator moves his or her body from side to side while sitting on the seat plate 3, the support arm 1 pivots within a horizontal plane around its base and is positioned at the desired position. Can be moved. Furthermore, when the foot pedal 41 is stepped on, the expansion/contraction means 4 within the support column 2 expands and contracts, allowing the user to adjust the vertical position while seated. Furthermore, by operating the foot pedal 6 to unlock the forward/backward movement means 5 and moving the waist back and forth, the seat board 3 can be moved forward and backward relative to the support column 2, and by operating the foot pedal 6 again, When the back and forth moving means 5 is locked, the seat board 3 is stopped at the proper position.

(Example) Next, an example will be described.

(Embodiment 1) FIG. 1 shows an example of application in a dental treatment apparatus, in which an operator's chair C of the present invention is placed near the side of a bed-type dental treatment table 7. Various dental handpieces 71 are mounted on the shoulder of the treatment table 7.
The operator sits on a chair C, extends the handpiece 71, and performs dental treatment on a patient lying on the treatment table 7.

In the illustrated example, the base 11 of the chair C is fixed to the floor surface, but it is of course possible to use it also as the base plate 70 of the treatment table 7. The horizontally rotating support arm 1 is pivotally mounted on the base 11 at its base and is capable of horizontally rotating.
A stopper 12 is protruded from the top, while the arm 1
An arcuate notch 13 that engages with the stopper 12 is formed at the base of the support arm 1, thereby restricting the range of rotation of the support arm 1. This is because the proper seating position of the operator in dental treatment is almost limited (for example, from the so-called 9 o'clock position to the 12 o'clock position with respect to the patient's oral cavity position), so we wanted to prevent unnecessary positional movement in advance. be.

As shown in FIG. 2, the support column 2 consists of an inner cylinder 21 that moves up and down and a fixed outer cylinder 22, and a damper-type cylinder 40 filled with gas is housed in the inner cylinder 21 as a telescoping means 4. . The cylinder 40 consists of a main body 42 and a rod 43, a valve stem 44 protrudes from the lower end of the rod 43, and by operating the valve stem 44 with a petal 41, the balance of gas pressure within the main body 42 changes. The main body 42 moves up and down and stops at an arbitrary position. As the main body 42 moves up and down, the inner cylinder 21 moves up and down, thereby adjusting the up and down position of the seat plate 3 as appropriate.

At the upper end of the inner cylinder 21, there are pulleys 511 on both sides.
A sliding plate 51 having... is fixedly installed, and the sliding plate 5
1 is housed between a pair of left and right guide members 52, 52 having a hook-shaped cross section, which are fixed along the front and rear sides of the lower surface of the seat plate 3 so as to be slidable back and forth. The sliding plate 51 and the guide members 52, 52 constitute a back and forth moving means 5.

A plurality of locking holes 31 are provided at the center of the lower surface of the seat plate 3 along the front and rear sides, and a stop pin 62 concentrically provided at the upper end of the inner cylinder 21 is elastically biased upward by a compression spring 621. It is inserted.

An operating rod 61 is fixedly connected to the lower end of the stop pin 62, and the operating rod 61 is installed inside the outer cylinder 22 along its longitudinal direction, and is used to operate the foot pedal 6 attached to the circumferential body of the outer cylinder 22. It moves up and down. When the operating rod 61 moves downward, the stop pin 62 descends against the elasticity of the spring 621, and its upper end slips out of the locking hole 31, allowing the sliding plate 51 to slide relative to the guide members 52, 52. That is, the lock of the forward and backward moving means 5 is released. Therefore, when the operator on the seat plate 3 moves his or her hips back and forth in this state, the seat plate 3 moves relative to the support column 2. When the foot pedal 6 is no longer operated, the stop pin 62 is raised by the biasing force of the spring 621, and its tip is re-inserted into one of the locking holes 31, so that the forward and backward moving means 5 is locked and stationary.

In this case, since the working rod 61 follows the vertical movement of the inner cylinder 21, only the working rod 61 must be allowed to move up and down even when the foot pedal 6 is not operated. Therefore, as shown in FIG. 3, the foot pedal 6 is provided with a hole 60 into which the working rod 61 is loosely inserted, and the pedal 6 is normally maintained in a substantially horizontal state by a spring 600, and the working rod 61 is Vertical movement within the hole 60 is allowed. When the pedal 6 is operated by foot, the pedal 6 is tilted and the opening edge of the hole 60 is tightened with the working rod 61. When the pedal 6 is further operated downward, the working rod 61 is directed downward in this tightened state. It moves.

Further, as shown in FIG. 2, a shaft body 512 is coupled to the lower surface of the sliding plate 51 and is fitted into the inner cylinder 21 so as to be rotatable, and the stop pin 62 is concentrically fitted to the shaft body 512. It is elastically loosely inserted. An operation knob 513 screwed onto the circumference of the inner cylinder 21 is for locking the rotation of the shaft 512. When the knob 513 is loosened, the shaft 512 rotates around the axis of the inner cylinder 21. Therefore, the seat plate 3 can be rotated around the axis of the support column 2 while the stop pin 62 and the locking hole 31 are engaged with each other.

(Embodiment 2) FIG. 4 shows a wire 63 in place of the working rod 61.
This is an example using . That is, wire 6
3 is a wire guide 631 whose upper end is connected to the stop pin 62 and attached along the outer cylinder 22.
It is inserted inside. A pair of cam pieces 63 are arranged in a V-shape at the lower end of the wire guide 631.
2,632 are pivotally connected, and the cam pieces 632,632
The lower end of is elastically biased in the closing direction by a tension spring 633. The cam piece 632,6
The wire 63 is located between the wires 32 so as to hang down. On the other hand, the foot pedal 6 is connected to the outer cylinder 22.
A chevron-shaped cam member 634 located below between the cam pieces 632 and 632 is pivotally connected to the tip of the cam member 632 so as to be vertically swingable. When the pedal 6 is stepped on, the cam member 634 moves upward and acts against the elasticity of the spring 633 to open the lower ends of the cam pieces 632, 632. At this time, the cam piece 63
The upper end portion of 2,632 holds the wire 63,
Further, by pressing the pedal 6, the cam piece 632,
632 rotates as shown by the arrow, only the wire 63 is pulled down, and the lock of the stop pin 62 with respect to the back and forth moving means 5 is released. When the foot pedal operation of the pedal 6 is stopped, the lower ends of the cam pieces 632, 632 rotate in the closing direction due to the restoring elasticity of the spring 633, and the grip on the wire 63 is released. In this state, the wire 63 is free, so even if the seat plate 3 is moved up and down as described above, it can follow it regardless of the petal 6.

(Embodiment 3) FIG. 5 shows an example in which a liquid-filled tube 64 is used in place of the working rod 61. The upper end of the liquid-filled tube 64 is connected to the lower end of the stop pin 62 so that the sealed liquid 642 in the tube 64 directly contacts the stop pin 62, and the lower end of the tube 64 is connected to a valve means 640 operated by the foot pedal 6. is connected to. When the pedal 6 is stepped on, the valve body 641 in the valve means 640 is actuated, whereby the liquid 642 sealed in the tube 64 is expanded or compressed, and the stop pin 62 is moved up and down by this expansion or compression pressure. tube 64
If you attach it so that it is loose along the pillar 2,
This allows the seat plate 3 to move up and down.

(Example 4) Figure 6 shows how the magnetic force is turned on and off by operating the petal 6.
The purpose is to move the stop pin 62 up and down when the switch is turned off. That is, the lower end of the stop pin 62 is loosely inserted into an electromagnetic coil 65 fixedly installed in the inner cylinder 22, and the electromagnetic coil 65 is activated by turning on and off a micro switch 651 when the pedal 6 is depressed. is being done. The stop pin 62 is normally elastically biased upward by the compression spring 621, but when the electromagnetic coil 65 is turned on by stepping on the pedal 6, the stop pin 62 is pulled down by the electromagnetic force, and the stop pin 62 is pulled down by the electromagnetic force. The lock is released.

It goes without saying that the locking/unlocking mechanism of the fore-and-aft movement means 5 is not limited to the one shown in the illustration, but can be modified in other ways as long as it is implemented by the foot pedal 6.

(Effects of the invention) As mentioned above, the operator's chair of the present invention is supported by a rotating support arm that is pivotally connected to the base, so it does not move to an unnecessary position and always maintains the position of the treatment device. It is placed at a predetermined position nearby, so it does not impair the smoothness of the operator's treatment and does not interfere with the patient's getting on and off. Furthermore, the user can freely select a position within the rotation range of the support arm, and can adjust the vertical or longitudinal position by operating the foot pedal while seated, which is extremely convenient. Particularly in the case of dental treatment equipment, it is necessary for the operator to adopt a delicate orientation depending on the disease state of the patient, and in such cases, the chair of the present invention, which has the above-mentioned excellent functions, is extremely beneficial. .

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of a dental treatment device showing an application example of the present invention's operator's chair, Fig. 2 is a sectional view taken along the line shown in Fig. 1, and Fig. 3 is a portion showing the main mechanism of the same embodiment. The cutaway perspective views and FIGS. 4 to 6 are schematic mechanical diagrams showing other modifications of the locking mechanism of the forward and backward moving means. Explanation of symbols, 1...Horizontal rotation support arm, 11
...base, 2...post, 3...seat board, 31...
...Latching hole, 4...Extensible means, 41...Foot pedal, 5...Back and forth movement means, 6...Foot pedal, 6
1... Working rod, 62... Stop pin, 63...
Connection wire, 64...Liquid-filled tube, 65
...Electromagnetic coil.

Claims (1)

[Scope of utility model registration request] A horizontal swing support arm 1 whose proximal end is pivotally connected to a base part 11, a column 2 erected at the tip of the arm 1, and a seat plate 3 mounted on the upper end of the column 2.
, a telescoping means 4 for vertically extending and contracting the support column 2 with a foot pedal 41, a longitudinal movement means 5 for moving the seat board 3 back and forth with respect to the support column 2, and locking and unlocking of the longitudinal movement means 5. The support 2 includes an inner cylinder 2 that moves up and down.
1 and a fixed outer cylinder 22, the telescoping means 4 and foot pedal 41 include a cylinder body 42, a cylinder rod 43 and a valve stem 44, and the inner cylinder 2
a gas-filled damper-type cylinder 40 housed in the valve stem 1; the foot pedal 41 attached to the circumferential body of the swing arm 1 for vertically moving the valve stem 44;
It is composed of the inner cylinder 21 that moves up and down in conjunction with the cylinder 42, and the back and forth moving means 5 and foot pedal 6 are fixed to the upper end of the inner cylinder 21 and have pulleys 511 at both ends. a plate 51, guide members 52, 52 which are fixedly installed on the lower surface of the seat plate 3 along the front and back and accommodate the pulleys 511 of the sliding plate 51 so as to be slidable back and forth, and the fixed outer cylinder 22. A stop pin 6 moves up and down in conjunction with the operation of the foot pedal 6 attached to the surrounding body, and elastically retracts into and out of locking holes 31 provided longitudinally on the lower surface of the seat plate 3.
A surgeon's chair consisting of 2.