JPS62240054A - Dental treating chair - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention uses a seat, a backrest, and a push/pull/drive device arranged in the backrest to occupy different suitable positions of the patient's head to be supported. The present invention relates to a dental treatment chair comprising a headrest adjustable in a backrest, the headrest being supported in the backrest so as to be movable in the longitudinal axis of the backrest by means of a slide rail.

Prior Art A dental treatment tool of the type described above is disclosed in West German Patent Application No. 2
It is known from specification No. 541,506. In this known non-dental procedure, an intermediate piece is arranged between the upper end of the slide rail and the headrest, a cam plate of the intermediate piece is provided on the backrest and is guided by an id, and When viewed from the side, it is curved in the shape of a wave. It is therefore possible to tilt the headrest about a horizontal axis while moving the headrest into or out of the backrest. However, when the headrest is in a flat position, the headrest can be tilted rearwardly through approximately 45° relative to the backrest, and the headrest can be extended approximately parallel to the backrest for getting into or leaving the chair without dental procedures. Ideally, the headrest should extend into the backrest by approximately 60 degrees, for example, from a reference position protruding from the backrest, and the end on the backrest side would protrude more than in the reference position. It is not possible to assume a typical maxillary treatment position in known dental treatment chairs which have an intermediate piece with a cam plate.

Problem to be Solved by the Invention It is an object of the invention to improve a dental treatment chair of the type mentioned at the outset in such a way that it is possible to provide the headrest with the above-mentioned ideal maxillary treatment position. .

Means for Solving the Problems In order to solve the above-mentioned problems, in the means of the present invention, a push rod that is operatively connected to a push/pull/drive device within the headrest is pivotally connected to the slide V rod, and its length is adjustable. A support member is provided in the headrest, and a control mechanism is arranged in the backrest for producing different movements of the slide rail and the push rod.

ADVANTAGES OF THE INVENTION By the measures of the invention, a mechanical geriatric movement of the headrest into the backrest is ensured with simultaneous tilting movement about the horizontal axis of the headrest assuming an ideal maxillary treatment position, The desired headrest position can be quickly and simply assumed by the overlapping movements.

Advantageous embodiments of the invention are claimed! @It is described below in Section 2.

Embodiment A dental procedure chair 1 is adjustable and supported on the backrest 3 to occupy different suitable positions of the patient's head using a seat 2, a backrest 3 and a push/pull drive device 7 arranged on the backrest 3. The headrest consists of 4 parts. The headrest 4 is supported movably in the direction of the longitudinal axis 6 of the backrest using a slide rail 5 supported on the backrest 3.

Different headrest positions are shown in FIG. 2: a reference position 43, a maxillary treatment position 44 and an intermediate position 45.

The pusher 8, which is operatively connected to the push-pull drive device 7, is pivoted to a slider rod v9 arranged in the headrest 4, the slider rod pivoting with its free end to a stationary support part 10 in the headrest. The free end of the slide rail 5 is connected to an intermediate piece 11 present inside the headrest 4, and the shaft portion 1 is connected horizontally from the intermediate piece.
2 protrudes, and the headrest 4 is pivotable around the shaft portion for tilting motion.

Inside the headrest 4 is a vertically long support member 1 whose length is adjustable.
4 is provided, which is pivotally connected at one end to the support part 10 and at the other end to the intermediate piece 11 and is further connected to the slide rod 9 by means of a tension spring 13.

A control mechanism for causing mutually different movements of the slide rail 5 and the push rod 8 is arranged inside the backrest 3. For this purpose, the push rod 8 has a rotation shaft 15 extending transversely to the direction of movement of the push rod, and a toothed wheel 16, forcibly guided on the rotation shaft, is on the one hand rigidly connected to the slide rail 15 and slides. A rack 17 which produces a longitudinal movement of the rail 15 engages on the other hand a rack piece 18 which is supported for free movement in the longitudinal direction and is provided with teeth on both sides, on the other side of the rack piece. meshes with another gear 19, which is supported on a support member 22 which is rigidly connected to the slide rail 5 and which is connected to the slider 2.
It meshes with 00 rack 21.

The forcibly guided gear 16 has a radial elongated hole 23 passing through the rotating shaft 15, and the elongated hole extends from the center point of the gear almost to the vicinity of the outer edge, and further spans the diameter on one side. This continues as a recess 24 almost up to the outer edge, in which a driving slide 25 is arranged for longitudinal movement and is rotatably supported at one end on the rotary shaft 16 , in which the slide 20 a base rail 26 extending in the direction of the backrest longitudinal axis 6 which is immovably arranged in the backrest 3;
is slidably supported on.

A control mechanism composed of the aforementioned components controls the different movements of the slide rail 5 on the one hand and of the push rod 8 on the other hand.

The push/pull/drive device 1 provided in the backrest 3 is constituted by a piston-cylinder unit, and a piston rod 2T that can move in and out of the piston-cylinder unit is connected to a push rod 8.

The length-adjustable support member 14 is constructed as a transversely segmented hollow rod, with both rod sections 28
．． 29 are connected to each other by an elongated rod 30 which extends slidably into both rod sections.

The gearwheel 19 meshing with the longitudinally movable rack piece 18 is covered by a cover plate 31. The cover plate is replaced by a large gear wheel rotating together with the gear wheel 19, which provides meshing with the rack 21 of the slider 20.

Recess 24 extending the elongated hole 23 of the forcedly guided gear 16
is arranged on the opposite side of the gear 16 from the push rod 8.

A casing 32 of the headrest 4 rotatably supports a head support section 34 via a horizontal shaft 33, which is partially connected to the casing 32 by a bellows 35.

The forcedly guided gear 16 is abutted on the rear side by a support grate 36.

Slide potentiometer 46, 48 and entrainment lever 47
．． 49 forms a control member.

As shown in FIG. 10, the slider 20 is
Assigned to the slide 20 is an adjustment device 3γ which can be operated from the outside and can be moved together with the push rod 8 and the headrest 4 along the pace noll 26.

To form the adjustment device fi 37, a push-pull drive 38 is connected to a gear wheel 39, which on the one hand connects to a rack 40 fixed in the backrest 3 and, on the other hand, to the backrest longitudinal axis of the slider 20. It engages a rack 41 which extends parallel to axis 6 and racks 21 and 40.

The push/pull drive device 38 is constituted by a piston-cylinder unit, of which a piston rod 42 that can move in and out has a gear 39 rotatably supported at its free end.

The functional piston rod 2T is running! Starting from the reference position shown in FIG. 3, when the piston rod 27 is moved in, the push rod 8 is correspondingly entrained. This vertical movement
The rotating shaft 15 attached to the push rod 8 and thus also the force-guided gear 16 follow, and the gear 16 is rotated by a longitudinal movement. In this case, the freely longitudinally movable rack piece 18 rotates a small gear 19, which rolls on the rack 21 of the slider 20 and pushes the slide rail 5 through the plate-shaped support member 22. 8 at different speeds in the longitudinal direction.

The entraining slider 25, which is rotatably mounted on the end of the forcedly guided gear 160 and the rotating shaft 15, is in the position shown in FIGS. 3 and 8 when the lock shown in FIG.
2, it is possible to move longitudinally in the radial groove formed by the radial elongated hole 23 and the recess 24 (FIG. 8). The aforementioned longitudinal movement of the entraining slide 25 causes the push rod 8 to move against the slide rail 5.
In addition, for example, the 60th section can be moved in the longitudinal direction. Therefore, the piston rod 2T is moved in at the upper jaw treatment position shown in FIGS. 6 and 7, and is moved out at the lower jaw treatment position shown in FIGS. 8 and 9.

If it is desired to move the headrest 4 more vertically without a tilting movement in order to compensate for different sizes of the patient's head, the adjustment device 37 shown in FIG. 10 is activated.

The piston rod 42 is moved longitudinally, which causes the gearwheel 39 to roll on the stationary rack 40 and causes the slider 20, the slide rail 5 and the push rod 8 to move correspondingly in the longitudinal direction.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view without dental treatment, FIG. 2 is a perspective view showing three positions of the headrest without dental treatment, and FIG. 6 is a perspective view without dental treatment. Fig. 4 is a sectional view taken along the rV-JT line in Fig. 6, Fig. 5 is a sectional view taken along the line ■-■ in Fig. 3, and Fig. 6 is a plan view without treatment. FIG. 7 is a sectional view taken along the line ■-■ in FIG. 6; FIG. 8 is a plan view showing the lower jaw treatment position of the headrest without dental treatment; 9 is a sectional view taken along the line IX-M in FIG. 8, and FIG. 10 is a plan view with the adjustment device without dental treatment.

Claims (1)

[Claims] 1. The seat (2), the backrest (3), and the push/pull/drive device (7) disposed in the backrest (3) are used to support the patient's head in different ways. A headrest (
4), in which the headrest (4) is supported in the backrest (3) movably in the direction of the longitudinal axis of the backrest (6) by means of a slide rail (5); type, a push rod (8
) is pivotally connected to the slide rod (9), a length-adjustable support member (14) is provided in the headrest, a slide rail (5) and a push rod (8) are provided in the backrest (3). A dental treatment tool characterized in that a control mechanism is arranged to produce different movements of the teeth. 2. A slide rod (9) arranged in the headrest (4) is pivoted with its free end to the immovable support part (10) of the headrest (4), and the free end of the slide rail (5) Intermediate piece (1) present in the headrest (4)
1), and the intermediate piece is connected to the horizontal shaft part (1).
2), and the headrest (
4) is pivotable and has a length-adjustable support member (14) connected to the slide rod (9) by means of a tension spring (13) to the support part (10) at one end and to the intermediate piece at the other end. (11), and the push rod (8) is attached to the backrest (
3) Rotating shaft (15) of gear (16) forcibly guided within
, the forcibly guided gear has on the one hand a rack (17) which is rigidly connected to the slide rail (5) and produces a longitudinal movement of the slide rail (5), and on the other hand a rack (17) which is free in the longitudinal direction. It meshes with one side of a movably supported rack piece (18) with teeth on both sides, the other side of the rack piece meshes with another gear (19), which in turn engages with the slider (20). ), and is supported by a support member (22) firmly connected to the slide rail (5), and the forcibly guided gear (16) is connected to the rotating shaft (15). It has a radial elongated hole (23) passing through it, and the elongated hole extends from the center point of the gear to almost the vicinity of the outer edge, and further has a recess (24) extending across the diameter on one side almost to the vicinity of the outer edge. The entraining slide (25) is movable longitudinally in the recess and is connected at one end to the axis of rotation (1) of the gear (16).
5), wherein the slider (20) is slidably supported on a base rail (26) extending in the direction of the backrest longitudinal axis (6) and arranged in the backrest (3). A dental treatment tool according to item 1. 3. The push/pull/drive device (7) is composed of a piston-cylinder unit;
3. A dental treatment tool according to claim 2, wherein the piston rod (27), which the unit can move in and out of, is connected to the push rod (8). 4. The length-adjustable support member (14) is configured as a laterally split hollow rod, with both rod parts (28, 29) of the hollow rod being slidable into both rod parts. Dental treatment tools according to claim 2 or 3, which are connected to each other by elongated rods (30) projecting into the dental treatment tools. 5. Dental procedure according to any one of claims 1 to 4, in which the gear (19) meshing with the longitudinally movable rack piece (18) is covered by a cover plate (31). Used. 6. The recess (24) following the elongated hole (23) of the forcedly guided gear (16) is arranged on the opposite side of the gear (16) from the push rod (8). A dental treatment tool according to any one of Items 1 to 5. 7. Claim 1, wherein the headrest (4) has a casing (32), and the casing pivotally supports a head support (34) via a horizontal axis (33). to 6. 8. Dental treatment tool according to claim 7, wherein the head holder (34) is connected to the edge of the casing (32) by a bellows (35). 9. The dental treatment device according to any one of claims 1 to 8, wherein the forcibly guided gear (16) is abutted on the rear side by a support plate (36). . 10. The slider (20) supports the slide rail (5), and the slide rail supports the slide rod (9) according to any one of claims 1 to 9. Dental treatment chair. 11. An adjustment device (37) operable from the outside moves the slider (20) along the base rail (26) together with the slide rail (5) and the push rod (8) as well as the headrest (4). ) A dental treatment tool as claimed in any one of claims 1 to 10. 12. Push/pull/pull to form the adjusting device (37)
On the one hand, the gear (39) connected to the drive device (38)
a rack (40) fixed to the backrest (3) and, on the other hand,
12. Dental treatment chair according to claim 11, in which the slider (20) is engaged with a rack (41) extending parallel to the longitudinal axis (6) of the backrest. 13. The push/pull/drive device (38) is composed of a piston-cylinder unit, and the piston rod (4) that can move in and out of the piston-cylinder unit
13. The dental treatment tool according to claim 12, wherein 2) rotatably supports a gear (39) at its free end.