阅读说明：本技术 牙科技工用角度调整工作台装置 (Angle adjusting workbench device for dental technician ) 是由 射场信行 于 2019-03-28 设计创作，主要内容包括：内置有磁铁的基轴(4)以能够旋转的方式突出设置于基台(1)。摆动体(7)具有正方形的基板(8)、球(9)、能够绕通过基板的中心且相对于基板垂直的轴旋转的球架(10)、以及将球架固定于所希望的旋转位置的止动件。球架将球保持为能够固定于所希望的旋转位置。工作台经由支承杆(20)安装于球。球的下部从球架以及基板朝向下方突出,摆动体在球的下端与基轴磁耦合。升降体(21)嵌入基轴,且通过隔圈(22)被固定于所希望的高度位置。在升降体开设有收容球的下部的凹部。在升降体与摆动体的基板接触时,摆动体取得水平位置,但在升降体下降且基板的一边与升降体的上表面抵接时,摆动体取得倾斜位置。具备显示与升降体的高度相对应的摆动体的倾斜位置处的倾斜角度的角度显示机构(23)。(A base shaft (4) having a built-in magnet is provided so as to protrude from the base (1) in a rotatable manner. The swing body (7) has a square base plate (8), a ball (9), a ball rack (10) capable of rotating around an axis passing through the center of the base plate and being vertical to the base plate, and a stopper for fixing the ball rack at a desired rotation position. The ball holder holds the ball in a position where it can be fixed in a desired rotational position. The table is attached to the ball via a support rod (20). The lower portion of the ball protrudes downward from the ball frame and the base plate, and the oscillating body is magnetically coupled to the base shaft at the lower end of the ball. The lifting body (21) is fitted into the base shaft and fixed at a desired height position by a spacer (22). The lifting body is provided with a concave part for accommodating the lower part of the ball. The swinging body takes a horizontal position when the elevating body is in contact with the substrate of the swinging body, but takes an inclined position when the elevating body is lowered and one side of the substrate is in contact with the upper surface of the elevating body. The device is provided with an angle display mechanism (23) for displaying the inclination angle of the swing body at the inclination position corresponding to the height of the lifting body.)

1. An angle adjusting workbench device for dental technicians, which is characterized in that,

the dental technician angle adjustment table device includes:

a base station;

a table which is disposed above the base and to which a dental laboratory workpiece is fixed; and

a table support mechanism provided on the base and supporting the table so that an inclination angle of the table can be adjusted,

the table support mechanism includes:

a base shaft that protrudes from the base and has a magnet built therein; and

a swinging body magnetically coupled to the tip of the base shaft,

the oscillator has:

a square substrate;

a ball formed of a ferromagnetic material;

a ball rack disposed at the center of the base plate and rotatable about an axis passing through the center of the base plate and extending perpendicularly to the base plate; and

a first stopper capable of fixing the ball rack at a desired rotational position with respect to the base plate,

the ball holder holds the ball rotatably about the center of the ball on the vertically extending shaft and fixable at a desired rotational position,

the oscillating body further includes a support rod extending radially outward from the ball and connected at an upper end to a lower surface of the table,

a lower portion of the ball protrudes from a lower surface of the ball frame and a lower surface of the base plate, the oscillating body is magnetically coupled to a receiving portion provided at a tip end of the base shaft at a lower end of the ball,

the table support mechanism further includes:

a lifting body which is embedded in the outer side of the base shaft and can slide along the base shaft in the vertical direction; and

a second stopper provided on the elevating body and/or the base shaft and capable of fixing the elevating body at a desired height with respect to the base shaft,

an upper surface of the elevating body has a horizontal surface, a recess is formed in the upper surface to accommodate the lower portion of the ball, a through hole reaching a lower surface of the elevating body is formed in a bottom surface of the recess, the through hole has a diameter corresponding to a diameter of the base shaft, and the base shaft passes through the through hole,

the swinging body takes a horizontal position when the elevating body is located at the highest point and the upper surface of the elevating body is in contact with the lower surface of the base plate of the swinging body, but takes an inclined position when the elevating body descends from the highest point and the upper surface of the elevating body is separated from the lower surface of the base plate of the swinging body and any one of the four sides of the base plate is in contact with the upper surface of the elevating body,

the dental technician angle adjustment table device further includes an angle display unit that displays an inclination angle of the oscillating body at the inclined position according to the height of the elevating body.

2. The dental mechanic's angular adjustment table apparatus of claim 1, wherein,

a first circular recess is formed in the center of the lower surface of the substrate of the oscillator, a first circular opening having a diameter larger than that of the ball and reaching the upper surface of the substrate is formed in the center of the bottom surface of the first circular recess,

the rack of the swing body has a rack main body including: a large diameter portion having a diameter larger than a diameter of the first circular opening; and a small-diameter portion coaxially connected to a lower end surface of the large-diameter portion and having a thickness corresponding to a depth of the first circular opening and a diameter corresponding to the first circular opening,

a second circular recess having a diameter larger than that of the ball is formed in the center of the upper end surface of the large diameter portion, and a second circular opening reaching the lower end surface of the small diameter portion is formed in the center of the bottom surface of the second circular recess, the second circular opening having a diameter smaller than that of the ball,

the ball rack further having an annular member having a thickness less than the depth of the first circular recess, an outer diameter greater than the diameter of the first circular opening but less than the diameter of the first circular recess, and an inner diameter corresponding to the diameter of the second circular opening,

the annular member is concentrically coupled to a lower end surface of the small-diameter portion in a state where the small-diameter portion is fitted into the first circular opening of the base plate, and the ball cage main body is attached to the base plate so as to be rotatable about the vertically extending axis,

the ball holder further has an annular ball pressing member having an outer diameter equal to a diameter of the first circular opening and an inner diameter smaller than the diameter of the ball,

first screw holes penetrating through both end surfaces of the ball pressing member are formed at three or more positions of the ball pressing member spaced apart in the circumferential direction, while second screw holes corresponding to the first screw holes are formed in a bottom surface of the second circular recess of the ball holder body,

the ball rack is also provided with a fixing screw which is screwed with the first threaded hole and the second threaded hole,

the fixing screw is screwed with the first screw hole and the second screw hole from the outside of the ball pressing member in a state where the ball is held between the bottom surface of the second circular recess of the rack body and the ball pressing member.

3. The dental mechanic's angular adjustment table apparatus of claim 2, wherein,

a plurality of recesses are formed at equal angular intervals on the outer peripheral surface of the small-diameter portion of the ball cage body, at least one radial hole extending radially outward from the vertically extending shaft of the base plate is formed in the inner wall of the first circular opening of the base plate at a position corresponding to the recess of the small-diameter portion, and the first stopper is formed of a ball plug that is attached to the radial hole, is always elastically biased toward the outer peripheral surface of the small-diameter portion, and can be engaged with the recess of the small-diameter portion.

4. The dental mechanic's angular adjustment table apparatus of claim 1, wherein,

the base shaft is rotatable around a shaft, a flange portion is provided at a lower portion of the base shaft,

the angle display mechanism has a pair of sector plates connected to each other so as to be rotatable about the center,

a tip end portion of one radial side edge of one of the pair of sector plates or an extension portion extending outward from the one sector plate along the one radial side edge is attached to the flange portion of the base shaft so as to be rotatable about a horizontal axis,

a tip end portion of a radial side edge of the other of the pair of sector plates, the tip end portion being close to the radial side edge of the one of the sector plates, or an extension portion extending outward from the other sector plate along the radial side edge, is attached to a side wall of the vertically movable body and is rotatable about an axis parallel to the horizontal axis,

the pair of sector plates are rotated around the center in a vertical plane with each other in accordance with the elevation of the elevating body,

an angle scale corresponding to the tilt angle of the oscillating body is marked on a peripheral wall surface of one of the pair of sector plates, and a zero point scale is marked on a peripheral wall surface of the other of the pair of sector plates.

5. The dental mechanic's angular adjustment table apparatus of claim 1, wherein,

the base shaft is fixed on the base platform,

the angle display mechanism has a pair of sector plates connected to each other so as to be rotatable about the center,

a tip portion of one radial side edge of one of the pair of sector plates or an extension portion extending outward from the one sector plate along the one radial side edge is attached to the base and is rotatable about a horizontal axis,

a tip end portion of a radial side edge of the other of the pair of sector plates, the tip end portion being close to the radial side edge of the one of the sector plates, or an extension portion extending outward from the other sector plate along the radial side edge, is attached to a side wall of the vertically movable body and is rotatable about an axis parallel to the horizontal axis,

the pair of sector plates are rotated around the center in a vertical plane with each other in accordance with the elevation of the elevating body,

an angle scale corresponding to the tilt angle of the oscillating body is marked on a peripheral wall surface of one of the pair of sector plates, and a zero point scale is marked on a peripheral wall surface of the other of the pair of sector plates.

6. The dental mechanic's angular adjustment table apparatus of claim 1, wherein,

the dental technician angle adjustment table device further includes a marking unit provided on the base and configured to mark the dental technician workpiece fixed to the table for design,

the marking unit has:

a rod protruding from the base and extending vertically;

an arm attached to the rod, extending in a diameter direction of the rod, and rotatable around an axis of the rod on a surface orthogonal to the rod;

a pen holder provided at a front end of the arm; and

and a pen which is held by the pen holder and extends parallel to the rod from the pen holder downward.

Technical Field

The present invention relates to an angle adjustment table device for a dental technician, and more particularly to an angle adjustment table device used in designing a hook and a base of a removable partial denture replacing a defective tooth.

Background

Fig. 8 is a perspective view illustrating a state in which a removable partial denture is attached to a plaster cast.

As shown in fig. 8 (a) and (B), the removable partial denture 33 includes an artificial tooth 34 and a hook 36 detachably fitted to an abutment 35 adjacent to the removable partial denture 33.

In the process of manufacturing the removable partial denture 33, first, a plaster model 37 is manufactured by molding a target tooth and a mucous membrane from the oral cavity of a patient, then an abutment 35 for the removable partial denture 33 is selected from the remaining teeth in the plaster model 37, and then a hook 36 is designed and manufactured so as to fit the curved surface shape of the abutment 35.

The hook 36 includes a wire hook made by bending a metal wire material and a cast hook made by casting an alloy.

As shown in fig. 8 (B), the hook 36 includes: a hook foot portion 38 embedded in the removable partial denture 33 and integrated with the removable partial denture 33; a hook portion 39 connected to the hook foot portion 38 and contacting an adjacent surface of the abutment 35; and a hook arm portion 40 connected to the hook portion 39 and surrounding the abutment 35 in an undercut (undercut) region of the abutment 35 (a region below a maximum carina of the tooth). The hook arm portion 40 is constituted by an upper arm portion 40a, a middle arm portion 40b at the center, and a hook tip portion 40c at the tip end in order of approaching the hook body portion 39.

When the removable partial denture 33 is fitted to the missing portion of the tooth, the hook arm 40 extending from the removable partial denture 33 around the abutment 35 engages with the undercut region of the abutment 35, thereby preventing the removable partial denture 33 from coming off and wobbling.

In this case, since the amount of the hook arm portion 40 that is bent into the undercut region greatly affects the fitting feeling and aesthetic quality of the removable partial denture 33 and the load on the abutment at the time of fitting, setting of the bending state of the hook arm portion 40 is very important in designing and manufacturing the hook 36, and is one of the most important design items regarding the removable partial denture 33.

The inventors of the present application have proposed an IBA denture design method as a method of designing a wire hook.

According to this method, as shown in fig. 9 (a) and (B), the gypsum model M is set at the initial setting position (see fig. 9 (a)₁The vertical direction is shown. ) And drawing a base line (maximum hump line) L for the plaster model M₁Then, the plaster model M is rotated by a predetermined angle (usually 15 °) to the buccal side and the lingual side, respectively (see fig. 9 (B)₂The vertical direction is shown. ) And an inclined line (hook profile line) L is drawn on the side surface of the abutment 35₂. Then, the baseline and the hook outline are compared, and the balance of the lingual and buccal sides of these lines is observed, and when the balance is poor, the initial setting position of the plaster model M is changed (fine adjustment), and the hook outline is redrawn. In this design method, the entire hook arm portion (hook tip portion, middle arm portion, and upper arm portion) is designed to be located in the undercut region.

As described above, in the IBA denture design method, it is necessary to draw a line of the hook arm portion while inclining the plaster model from the initial setting position, and therefore, several angle adjustment table devices for supporting the hook design by this method have been proposed in the related art.

As such an angle adjustment table device, for example, there is an angle adjustment table device including: a third fixing mechanism for fixing the support rod at a desired inclined position by mounting the first rotating member rotatably about a horizontal axis with respect to a column provided on the base, housing the second rotating member in an internal space of the first rotating member and rotatably about an axis perpendicular to the horizontal axis, the first rotating member being fixable at a desired rotational position with respect to the column, and the second rotating member being fixable at a desired rotational position with respect to the first rotating member, and providing a universal joint mechanism in the second rotating member, positioning a rotational center of the universal joint mechanism on the perpendicular axis, coupling a lower end of the support rod to the second rotating member via the universal joint mechanism, and fixing the table to an upper end of the support rod; and a fourth fixing mechanism for rotating and fixing the support rod from the desired inclined position by a desired angle around an axis passing through a rotation center of the universal joint mechanism, out of a horizontal axis or an axis parallel to the horizontal axis (see patent document 1).

According to the angle adjustment table device, the number of the rotating part and the rotating position fixing part is reduced, so that simplification of the device structure, reduction of the manufacturing cost of the device, and improvement of the operability of the device can be achieved to some extent.

However, the angle adjustment table device is still expensive, difficult to maintain, and requires a long time to be used for the operation of the device.

That is, the angle adjusting device still has room for simplifying the device structure and improving the operability.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 6150093

Disclosure of Invention

Problems to be solved by the invention

Accordingly, an object of the present invention is to provide an angle adjustment table device having a simpler structure and excellent operability.

Means for solving the problems

In order to solve the above problem, according to the present invention, there is provided an angle adjustment table device for a dental technician, comprising: a base station; a table which is disposed above the base and to which a dental laboratory workpiece is fixed; and a table support mechanism that is provided on the base and supports the table so that an inclination angle of the table can be adjusted, the table support mechanism including: a base shaft that protrudes from the base and has a magnet built therein; and a swinging member magnetically coupled to a tip of the base shaft, the swinging member including: a square substrate; a ball formed of a ferromagnetic material; a ball rack disposed at the center of the base plate and rotatable about an axis passing through the center of the base plate and extending perpendicularly to the base plate; and a first stopper capable of fixing the rack at a desired rotational position with respect to the base plate, the rack holding the ball in an arrangement in which a center of the ball is positioned on the vertically extending shaft so as to be rotatable about the center and fixable at the desired rotational position, the swing body further including a support rod extending radially outward from the ball and connected at an upper end to a lower surface of the table, a lower portion of the ball protruding from a lower surface of the rack and a lower surface of the base plate, the swing body magnetically coupling at a lower end of the ball to a receiving portion provided at a front end of the base shaft, the table support mechanism further including: a lifting body which is embedded in the outer side of the base shaft and can slide along the base shaft in the vertical direction; and a second stopper provided on the elevating body and/or the base shaft and capable of fixing the elevating body at a desired height with respect to the base shaft, wherein an upper surface of the elevating body has a horizontal surface, a recess capable of accommodating the lower portion of the ball is formed in the upper surface, a through hole reaching a lower surface of the elevating body is formed in a bottom surface of the recess, the through hole has a diameter corresponding to a diameter of the base shaft, the base shaft passes through the through hole, the swinging body takes a horizontal position when the elevating body is located at a highest point and an upper surface of the elevating body comes into contact with a lower surface of the base plate of the swinging body, but when the elevating body is located from the highest point and the upper surface of the elevating body is separated from the lower surface of the base plate of the swinging body and any one of four sides of the base plate comes into contact with the upper surface of the elevating body, the dental technician angle adjustment table device further includes an angle display unit that displays an inclination angle of the swinging member at the inclined position corresponding to the height of the elevating member.

According to a preferred embodiment of the present invention, a first circular recess is formed in the center of the lower surface of the base plate of the swinging body, and a first circular opening having a diameter larger than the diameter of the ball and reaching the upper surface of the base plate is formed in the center of the bottom surface of the first circular recess, and the ball frame of the swinging body has a frame main body including: a large diameter portion having a diameter larger than a diameter of the first circular opening; and a small diameter portion coaxially connected to a lower end surface of the large diameter portion, and having a thickness corresponding to a depth of the first circular opening and a diameter corresponding to the first circular opening, a second circular recess having a diameter larger than that of the ball being formed at a center of an upper end surface of the large diameter portion, a second circular opening reaching a lower end surface of the small diameter portion being formed at a center of a bottom surface of the second circular recess, the second circular opening having a diameter smaller than that of the ball, the ball holder further having an annular member having a thickness smaller than a depth of the first circular recess, an outer diameter larger than that of the first circular opening but smaller than that of the first circular recess, and an inner diameter corresponding to that of the second circular opening, in a state where the small diameter portion is fitted into the first circular opening of the base plate, the annular member is concentrically coupled to a lower end surface of the small-diameter portion, the ball holder body is attached to the base plate so as to be rotatable about the vertically extending shaft, the ball holder further includes an annular ball pressing member having an outer diameter equal to a diameter of the first circular opening and an inner diameter smaller than a diameter of the ball, first screw holes penetrating both end surfaces of the ball pressing member are formed at three or more positions spaced apart in a circumferential direction of the ball pressing member, a second screw hole corresponding to the first screw hole is formed in a bottom surface of the second circular recess of the ball holder body, and a fixing screw is screwed into the first screw hole and the second screw hole, and the ball is held between the ball pressing member and the bottom surface of the second circular recess of the ball holder body, the fixing screw is screwed into the first and second screw holes from the outside of the ball pressing member.

According to another preferred embodiment of the present invention, a plurality of recesses are formed at equal angular intervals on the outer peripheral surface of the small-diameter portion of the ball cage body, at least one radial hole extending radially outward from the vertically extending shaft of the base plate is formed at a position corresponding to the recess of the small-diameter portion in the inner wall of the first circular opening of the base plate, and the first stopper is formed by a ball plug which is attached to the radial hole, is always elastically biased toward the outer peripheral surface of the small-diameter portion, and is engageable with the recess of the small-diameter portion.

According to another preferred embodiment of the present invention, the base shaft is rotatable about an axis, a flange portion is provided at a lower portion of the base shaft, the angle display mechanism has a pair of sector plates coupled to each other so as to be rotatable about a center, a front end portion of one radial side edge of one of the sector plates or an extension portion extending outward from the one sector plate along the one radial side edge is attached to the flange portion of the base shaft so as to be rotatable about a horizontal axis, a front end portion of a radial side edge of the other sector plate of the sector plates close to the one radial side edge of the one sector plate or an extension portion extending outward from the other sector plate along the one radial side edge is attached to a side wall of the vertically movable body so as to be rotatable about an axis parallel to the horizontal axis, the pair of sector plates are rotated about the center in a vertical plane in accordance with the up-down movement of the up-down body, and an angle scale corresponding to the tilt angle of the oscillating body is marked on a peripheral wall surface of one of the pair of sector plates, while a zero point scale is marked on a peripheral wall surface of the other of the pair of sector plates.

According to another preferred embodiment of the present invention, the base shaft is fixed to the base, the angle display mechanism includes a pair of sector plates rotatably coupled to each other about a center, a front end portion of one radial side edge of one of the pair of sector plates, or an extension portion extending outward from the one sector plate along one radial side edge, is attached to the base and is rotatable about a horizontal axis, a front end portion of a radial side edge of the other sector plate of the pair of sector plates, which is close to the one radial side edge of the one sector plate, or an extension portion extending outward from the other sector plate along the one radial side edge, is attached to a side wall of the vertically movable body and is rotatable about an axis parallel to the horizontal axis, and the pair of sector plates rotate about the center in a vertical plane in accordance with the vertical movement of the vertically movable body, an angle scale corresponding to the tilt angle of the oscillating body is marked on a peripheral wall surface of one of the pair of sector plates, and a zero point scale is marked on a peripheral wall surface of the other of the pair of sector plates.

According to another preferred embodiment of the present invention, the dental technician angle adjustment table device further includes a marking unit provided on the base and configured to mark the dental technician workpiece fixed to the table for design, the marking unit including: a rod protruding from the base and extending vertically; an arm attached to the rod, extending in a diameter direction of the rod, and rotatable around an axis of the rod on a surface orthogonal to the rod; a pen holder provided at a front end of the arm; and a pen held by the pen holder and extending downward from the pen holder in parallel with the rod.

Effects of the invention

According to the present invention, the number of components constituting the angle adjustment table device is reduced and the device structure is simplified as compared with the conventional example, so that the manufacturing cost of the device can be significantly reduced and the device can be miniaturized, and the maintenance of the device is also facilitated.

In addition, the number of parts to be operated for adjusting the angle of the table is reduced, and the method of the operation is simplified. Therefore, even a beginner can operate the device skillfully in a short time.

Drawings

Fig. 1 is a perspective view of an angle adjustment table apparatus for a dental technician according to an embodiment of the present invention.

Fig. 2 is a longitudinal sectional view of a table support mechanism of the angle adjustment table device of fig. 1.

Fig. 3 is an exploded perspective view of a swinging body of the angle adjustment table device of fig. 1.

Fig. 4 is a side view of the angle adjustment table device of fig. 1.

Fig. 5 is a perspective view illustrating a state in which a dental technician is fixed to a table of the angle adjustment table apparatus of fig. 1.

Fig. 6 is a longitudinal sectional view of a table support mechanism of an angle adjustment table apparatus for a dental technician according to another embodiment of the present invention.

Fig. 7 is a side view of the angle adjustment table device of fig. 6.

Fig. 8 is a perspective view illustrating a state in which a removable partial denture is attached to a plaster cast.

Fig. 9 is a diagram illustrating a method of designing a wire hook by the IBA denture design method, where (a) is a side view when the plaster model is viewed from the buccal side, and (B) is a view along D of (a)₁A cross-sectional view of the line, and (C) a plan view of the plaster model.

Detailed Description

Hereinafter, the structure of the present invention will be described based on preferred embodiments with reference to the drawings.

Fig. 1 is a perspective view of an angle adjustment table device for a dental technician according to an embodiment of the present invention, and fig. 2 is a longitudinal sectional view of a table support mechanism of the angle adjustment table device of fig. 1. Fig. 3 is an exploded perspective view of a swinging member of the angle adjustment table device of fig. 1, and fig. 4 is a side view of the angle adjustment table device of fig. 1.

Referring to fig. 1, the angle adjustment table device of the present invention includes: a base station 1; a table 2 disposed above the base 1, and to which a dental laboratory workpiece W is fixed on the table 2; and a table support mechanism 3 provided on the base 1 and supporting the table 2 so that an inclination angle of the table 2 can be adjusted.

In the present embodiment, the base 1 has a rectangular flat plate shape, and rubber legs 1a are attached to four corners of the lower surface of the base 1.

As shown in fig. 2, the table support mechanism 3 includes a base shaft 4, and the base shaft 4 is provided on the base 1 so as to protrude through a thrust bearing 5 and is rotatable around the axis.

The base shaft 4 incorporates a magnet 6, and an upper end surface of the magnet 6 is exposed to a bottom surface of a receiving portion 4a formed at a distal end of the base shaft 4 and receiving a ball 9 (described later).

Further, a flange portion 4b is provided at a lower portion of the base shaft 4.

The table support mechanism 3 further includes a swinging body 7 magnetically coupled to the distal end (receiving portion 4a) of the base shaft 4.

The oscillating body 7 has: a square substrate 8; a ball 9 formed of a ferromagnetic material; and a ball rack 10 disposed at the center of the base plate 8 and rotatable about an axis Z passing through the center of the base plate 8 and extending perpendicularly to the base plate 8.

Referring to fig. 2 and 3, a first circular recess 8b is formed in the center of the lower surface of the substrate 8, and a first circular opening 8a having a diameter larger than that of the ball 9 reaches the upper surface of the substrate 8 is formed in the center of the first circular recess 8 b.

In the present embodiment, the rack 10 has a rack body 13, and the rack body 13 includes: a large diameter portion 11 having a diameter larger than that of the first circular opening 8 a; and a small-diameter portion 12 coaxially connected to a lower end surface of the large-diameter portion 11 and having a thickness corresponding to the depth of the first circular opening 8a and a diameter corresponding to the first circular opening 8 a.

A second circular recess 11a having a diameter larger than that of the ball 9 is formed in the center of the upper end surface of the large diameter portion 11, and a second circular opening 12a reaching the lower end surface of the small diameter portion 12 is formed in the bottom surface of the second circular recess 11 a. The second circular opening 12a has a diameter smaller than the diameter of the ball 9.

The ball rack 10 also has an annular member 14, the annular member 14 having a thickness less than the depth of the first circular recess 8b, an outer diameter greater than the diameter of the first circular opening 8a but less than the diameter of the first circular recess 8b, and an inner diameter corresponding to the diameter of the second circular opening 12 a.

In a state where the small-diameter portion 12 of the ball holder body 13 is fitted into the first circular opening 8a of the base plate 8, the annular member 14 is concentrically screwed to the lower end surface of the small-diameter portion 12, and the ball holder body 13 is attached to the base plate 8 so as to be rotatable about the axis Z.

As is apparent from fig. 3, a plurality of (4 in the present embodiment) recesses 12b are formed at equal angular intervals on the outer peripheral surface of the small-diameter portion 12. Further, a hole (not shown) in the radial direction extending radially outward from the axis Z of the base plate 8 is formed in the inner wall of the first circular opening 8a of the base plate 8 at a position corresponding to the recess 12b of the small-diameter portion 12.

A ball plunger 15 is disposed in the hole in the radial direction so as to be elastically biased toward the outer peripheral surface of the small diameter portion 12 at all times.

The ball plunger 15 constitutes a first stopper capable of fixing the ball rack 10 at a desired rotational position with respect to the base plate 8 of the swing body 7.

Note that the structure of the first stopper is not limited to this embodiment.

In the present embodiment, the ball plunger 15 engages with the recess 12b of the small-diameter portion 12 at every 90-degree rotation, but the reference position of the dental technician workpiece W fixed to the table 2 is defined by one rotation position at which the ball plunger 15 engages with the recess 12b (which will be described later).

The ball holder 10 also has an annular ball pressing member 16, the ball pressing member 16 having an outer diameter corresponding to the diameter of the first circular opening 8a and an inner diameter smaller than the diameter of the ball 9.

First screw holes 17 penetrating both end surfaces of the ball pressing member 16 are formed at three or more positions spaced apart in the circumferential direction of the ball pressing member 16, and second screw holes 18 corresponding to the first screw holes 17 are formed in the bottom surface of the circular recess 11a of the rack body 13.

The ball rack 10 further has a fixing screw 19, and the fixing screw 19 is screwed into the first and second screw holes 17 and 18.

The ball 9 is sandwiched between the bottom surface of the circular recess 11a of the rack body 13 and the ball pressing member 16 in such a manner that the center of the ball 9 is positioned on the vertically extending axis Z, and the fixing screw 19 is screwed into the first and second screw holes 17 and 18 from the outside of the ball pressing member 16 in a state where the lower portion of the ball 9 protrudes from the lower surface of the rack 10 and the lower surface of the base plate 8.

The ball 9 is freely rotatable while magnetically coupled to the receiving portion 4a by the loose fixing screw 19, and the ball 9 is fixed between the bottom surface of the second circular recess 12a of the ball holder body 13 and the ball pressing member 16 by tightening the fixing screw 19.

The oscillating body 7 further includes a support rod 20, and the support rod 20 extends radially outward from the ball 9. The support rod 20 is connected at its distal end to the lower surface of the table 2.

The oscillating body 7 is magnetically coupled to the receiving portion 4a (magnet 6) at the distal end of the base shaft 4 at the lower end of the ball 9.

In this case, the magnet 6 has a magnetic force that generates a magnetic coupling force having a magnitude that can maintain the positional relationship of the ball 9 with respect to the receiving portion 4a unless an external force of a certain degree or more is applied.

The table support mechanism further includes an elevating body 21, and the elevating body 21 is fitted to the outside of the base shaft 4 and is capable of sliding in the vertical direction along the base shaft 4.

The lifting body 21 includes an upper portion 21c having a rectangular (or square) flat plate shape and a lower portion 21d having a cylindrical shape and concentrically connected to the center of the lower surface of the upper portion 21 c.

The upper surface of the upper portion 21c is a horizontal surface, and a recess 21a capable of accommodating a lower portion of the ball 9 (a portion protruding from the lower surface of the base plate 8 and the lower surface of the ball rack 10) is opened on the upper surface, and a through hole 21b reaching the lower surface of the vertically movable body 21 is formed in the bottom surface of the recess 21 a. The through hole 21b has a diameter corresponding to the diameter of the base shaft 4.

A spacer 22 having an inner diameter corresponding to the through hole 21b is attached to the lower surface of the vertically movable body 21, and the base shaft 4 penetrates the through hole 21b and the spacer 22.

The vertically movable body 21 is slidably movable along the base shaft 4 by loosening the fastening screw 22a of the spacer 22, and the vertically movable body 21 is fixed at a desired height with respect to the base shaft 4 by fastening the fastening screw 22 a.

The spacer 22 constitutes a second stopper capable of fixing the vertically movable body 21 to the base shaft 4 at a desired height.

Note that the structure of the second stopper is not limited to this embodiment.

In this way, when the lifting/lowering body 21 is located at the highest point and the upper surface of the lifting/lowering body 21 comes into contact with the lower surface of the substrate 8 of the swinging body 7, the swinging body 7 takes a horizontal position (see fig. 2), but when the lifting/lowering body 21 is lowered from the highest point and the upper surface of the lifting/lowering body 21 is separated from the lower surface of the substrate 8 of the swinging body 7 and any one of the four sides of the substrate 8 comes into contact with the upper surface of the lifting/lowering body 21, the swinging body 7 takes an inclined position (see fig. 4).

In this case, when the swinging body 7 is in the horizontal position, the axis Z coincides with the vertical axis (the axis perpendicular to the upper surface of the vertically movable body 21) (see fig. 2), and at this time, the table 2 (the support rod 20) can be freely tilted via the ball 9 by loosening the fixing screw 19, and the table 2 (the support rod 20) can be fixed at a desired tilted position by tightening the fixing screw 19.

When the oscillating body 7 is brought into an inclined position in a state where the table 2 (support rod 20) is fixed at a desired inclined position, the table 2 (support rod 20) rotates the inclination angle of the oscillating body 7 clockwise or counterclockwise about one of two horizontal axes (X-Y axes) passing through the center of the ball 9 and orthogonal to each other on the vertical axis.

The angle adjustment table device of the present invention further includes an angle display means 23, and the angle display means 23 displays the inclination angle of the oscillating body 7 at the inclined position according to the height of the elevating body 21.

As shown in fig. 2 and 4, in the present embodiment, the angle display mechanism 23 includes a pair of sector plates 24 and 25 connected to each other so as to be rotatable about the center.

One of the pair of sector plates 24, 25 has an extension portion 24b extending outward from the sector plate 24 along one radial side edge 24a, and the other of the pair of sector plates 24, 25 has an extension portion 25b extending outward from the sector plate 25 along one radial side edge 25a close to the one radial side edge 24a of the sector plate 24.

The tip of the extension portion 24b of the sector plate 24 is pivotally attached to an attachment shaft 26 extending horizontally in the radial direction from the peripheral wall of the flange portion 4b of the base shaft 4, and the tip of the extension portion 25b of the sector plate 25 is pivotally attached to an attachment shaft 27 extending in parallel with the attachment shaft 26 in the radial direction from the side wall of the lower portion 21d of the vertically movable body 21.

As a result, the pair of sector plates 24 and 25 rotate about the center (connecting point) of each other in the vertical plane as the vertically movable body 21 moves up and down.

In addition, an angle scale S corresponding to the inclination angle of the oscillating body 7 is marked on the peripheral wall surface of the sector plate 24₁On the other hand, a zero point scale S is marked on the circumferential wall surface of the sector plate 25₂。

Angle scale S₁The preparation is performed in the following manner.

First, the elevating body 21 is fixed at the highest point (the swinging body 7 takes a horizontal position) on the angle scale S₁Middle zero point scale S₂Consistent points are marked with a zero scale. Then, the height of the vertically movable body 21 is changed, and the tilt angle of the substrate 8 of the oscillating body 7 at the tilt position is measured every time, at the same time, on the angle scale S₁Middle zero point scale S₂The coincident points mark the measured angle.

Thus, the elevating body 21 is fixed to the zero point scale S₂The designated angle is set to a height of a desired angle, and then one of the four sides of the substrate 8 of the oscillating body 7 is brought into contact with the upper surface of the vertically movable body 21. Thereby, the table 2 (support rod 20) is rotated clockwise or counterclockwise by the desired angle about one of two horizontal axes (X-Y axes) passing through the center of the ball 9 and orthogonal to each other on the vertical axis.

In the present embodiment, the extension portions 24b and 25b are provided on the pair of sector plates 24 and 25, respectively, but the extension portions 24b and 25b may not be provided, and the pair of sector plates 24 and 25 may be pivotally attached to the associated attachment shafts 26 and 27 at the tip end portions of the one radial side edge 24a and the one radial side edge 25a, respectively.

Fig. 5 is a perspective view showing a state in which the dental technician workpiece W is fixed to the table 2.

As shown in fig. 5, the table 2 has a flat plate shape, and has holes 2a arranged at equal intervals in the longitudinal direction and the width direction, respectively, and a fastening pin 2c having a pair of receiving pins 2b and a fastening screw 2d is selectively fitted into any one of the holes 2 a.

The dental technician workpiece W is set on the table 2 by being fastened and fixed between the pair of receiving pins 2b and the fastening screw 2 d.

In the present embodiment, the marking unit 28 is further provided for marking the dental technician workpiece W fixed to the table 2 for design.

The marking unit 28 has: a rod 29 which is provided to protrude from the base 1 and extends in the vertical direction; an arm 30 attached to the rod 29, extending in the diameter direction of the rod 29, and rotatable about the axis of the rod 29 on a surface orthogonal to the rod 29; a pen holder 31 provided at the front end of the arm 30; and a pen 32 which is held by the pen holder 31 and extends downward from the pen holder 31 in parallel with the rod 29.

In the present embodiment, the marking means 28 for marking the measurement line on the plaster model is provided in order to use the angle adjustment table device for designing the hook and the artificial tooth bed, and thus the plaster model is assumed as the dental mechanic workpiece W. When the workpiece W for the dental technician is to be cut and polished, an appropriate cutting means or polishing means is provided instead of the marking means 28.

The angle adjustment table device of the present invention can also be used for installation of accessories, fabrication of a stent for an implant, and the like.

Next, a method of using the angle adjustment table device of the present invention will be described.

For example, when a measuring line is marked on a plaster model for removable partial denture preparation, the plaster model is fixed to the table 2 as a dental mechanic workpiece W. At this time, the ball plunger 15 of the base plate 8 of the swing body engages with the concave portion 12b of the ball rack 10, and the gypsum pattern W is disposed at the reference position (shown in fig. 9C).

Subsequently, the vertically movable body 21 is fixed to the zero point scale S of the angle display mechanism 23₂With angle scale S₁The zero point of (c) is the same height (highest point).

Then, in a state where the fixing screws 19 of the swinging body 7 are loosened, the table 2 (the plaster model W) is tilted to the initial setting position while observing the balance of the left and right teeth of the plaster model, and then the fixing screws 19 are tightened to fix the table 2 to the initial setting position.

At the initial setting position, while the table 2, the swinging body 7, the lifting body 21, and the base shaft 4 are rotated around the vertical axis as a unit, a base line (maximum camber line) is drawn on the plaster model W by the marking means 28 (pen 32) (L of fig. 9 a)₁)。

Then, the fastening screw 22a of the spacer 22 is loosened, and the vertically movable body 21 is lowered to the zero point scale S of the angle display mechanism 23₂With angle scale S₁And then the fastening screw 22a is tightened again to fix the vertically movable body 21 at the height.

Next, the swinging body 7 is tilted to the left and right of the plaster model W (rotated clockwise and counterclockwise about the X axis of fig. 9 (C)), and tilt lines (hook contour lines) are drawn on the lingual side and buccal side of the abutment 35 of the plaster model W by the pen 32 while the table 2, the swinging body 7, the elevating body 21, and the base shaft 4 are rotated around the vertical axis as a unit each time (L of fig. 9 (a))₂)。

Then, the base line L₁And the hook contour line L₂Controls were performed and the lingual and buccal side of the teeth of these lines were observed for balance. When the balance is good, the operation is completed, but when the balance is poor, the initial setting position of the table 2 needs to be changed (fine adjustment).

The method of changing (fine adjustment) the initial setting position is as follows.

(1) In the case of performing change (fine adjustment) around the X-axis or Y-axis of FIG. 9C

The fastening screw 22a of the spacer 22 is loosened, the vertically movable body 21 is lowered, and the fastening screw 22a is fastened at a desired angle while observing the angle display mechanism 23.

The set screw 19 is then loosened. Thereby, the fixing between the oscillating body 7 and the ball 9 is released, but the ball 9 supporting the table 2 is magnetically coupled with the magnet 6 of the base shaft 4, and therefore the inclination of the table 2 is not changed.

Then, the ball 9 is fixed to the oscillating body 7 by tightening the fixing screw 19 so that the one side of the base plate 8 of the oscillating body 7 in the free state abuts on the upper surface of the elevating body 21 and matches the desired inclination angle with respect to the X axis or the Y axis. Subsequently, the fastening screw 22a of the spacer 22 is loosened, the vertically movable body 21 is raised, and the scale of 0 of the angle display mechanism 23 is returned, whereby the change (fine adjustment) of the initial setting position of the table 2 is completed.

(2) In the case of performing change (fine adjustment) around the α axis of fig. 9 (C)

In a state where the table 2 is set at the initial setting position, the rack 10 is rotated until the α axis coincides with the X axis or the Y axis. Then, the change (fine adjustment) is completed by performing the same operation as (1) above.

After the initial setting position of the table 2 is changed (fine adjustment), the gypsum model W is set again at a predetermined angle with reference to the new initial setting position, and the hook outline L is drawn₂Thereby obtaining an ideal hook profile of the hook.

As described above, according to the present invention, the number of components constituting the angle adjustment table device is reduced and the device structure is simplified as compared with the conventional angle adjustment table device, whereby the manufacturing cost of the device can be significantly reduced and the device can be miniaturized, and the maintenance of the device is also facilitated.

In addition, the number of parts to be operated for adjusting the angle of the table 2 is reduced, and the method of the operation is also very simple. Therefore, even a beginner can operate the device skillfully in a short time.

Fig. 6 is a longitudinal sectional view of a table support mechanism of an angle adjustment table apparatus for a dental technician according to another embodiment of the present invention, and fig. 7 is a side view of the angle adjustment table apparatus of fig. 6.

In the embodiment shown in fig. 6 and 7, only the method of attaching the base shaft to the base and the attachment position of the angle display mechanism are different from those of the embodiment shown in fig. 1 to 5. Therefore, in fig. 6 and 7, the same components as those shown in fig. 1 to 5 are denoted by the same reference numerals, and detailed description thereof will be omitted below.

Referring to fig. 6 and 7, in the present embodiment, the base shaft 4' is fixed to the base 1, does not rotate around the axis, and does not have a flange portion.

The magnet 6 is incorporated in the base shaft 4 ', and the upper end surface of the magnet 6 is exposed to the bottom surface of the receiving portion 4a ' formed at the distal end of the base shaft 4 ' and receiving the ball 9.

The front end of the extension portion 25b of the sector plate 25 of the angle display mechanism 23 is pivotally attached to the attachment shaft 27 of the vertically movable body 21, and the front end of the extension portion 24b of the sector plate 24 is pivotally attached to an attachment shaft 26' that is fixed to a side surface of the base 1 and is parallel to the attachment shaft 27.

As a result, the pair of sector plates 24 and 25 rotate about the center (connecting point) of each other in the vertical plane as the vertically movable body 21 moves up and down.

In the present embodiment, the rotation around the vertical axis at the initial setting position of the table 2 is realized by integrally rotating the table 2 and the oscillating body 7 around the axis Z in a state where the lower surface of the base plate 8 of the oscillating body 7 is brought into contact with the upper surface of the elevating body 21.

The rotation about the vertical axis at the tilt position of the table 2 is realized by rotating the table 2 and the oscillating body 7 integrally about the receiving portion 4a 'of the base shaft 4' as a fulcrum in a state where the corresponding one side of the base plate 8 of the oscillating body 7 is brought into contact with the upper surface of the vertically movable body 21.

While the structure of the present invention has been described above based on the preferred embodiments, it is needless to say that the structure of the present invention is not limited to the above-described embodiments, and those skilled in the art can conceive various modifications within the scope of the structure described in the claims of the present application.

For example, the ball holder 10 may have any configuration as long as it is arranged at the center of the base plate 8, can rotate about an axis Z passing through the center of the base plate 8 and extending perpendicularly to the base plate 8, and can hold the ball 9 in an arrangement in which the center of the ball 9 is located on the axis Z so as to be rotatable about the center and fixable at a desired rotational position.

For example, the angle display means 23 may have any configuration as long as it can display the inclination angle of the swinging body 7 at the inclined position according to the height of the vertically movable body 21.

Description of the reference numerals

1: base, 1 a: rubber foot, 2: table, 2 a: hole, 2 b: receiving pin, 2 c: fastening pin, 3: table support mechanism, 4': base shaft, 4 a': receiving part, 4 b: flange portion, 5: thrust bearing, 6: magnet, 7: oscillating body, 8: substrate, 8 a: first circular opening, 8 b: first circular recess, 9: ball, 10: ball rack, 11: large diameter portion, 11 a: second circular recess, 12: minor-diameter portion, 12 a: second circular opening, 12 b: recess, 13: ball rack main body, 14: annular member, 15: ball plunger (first stopper), 16: ball pressing member, 17: first threaded hole, 18: second screw hole, 19: set screw, 20: support rod, 21: lifting body, 21 a: recess, 21 b: through-hole, 21 c: upper portion, 21 d: lower portion, 22: spacer (second stopper), 22 a: fastening screw, 23: angle display mechanism, 24: sector plate, 24 a: radial-direction one-side edge, 24 b: extension, 25: sector plate, 25 a: radial side edge, 25 b: extensions, 26', 27: mounting shaft, 28: marking unit, 29: rod, 30: arm, 31: pen rack, 32: pen, 33: removable partial denture, 34: artificial tooth, 35: abutment, 36: hook, 37: plaster model, 38: hook leg portion, 39: hook portion, 40: hook arm portion, 40 a: upper arm portion, 40 b: middle arm portion, 40 c: hook tip part, D₁: initial setting of direction, D₂: direction of inclination, L₁: base line (maximum bumper), L₂: inclined line, M: plaster model, S₁: angle scale S₂: zero point scale, W: dental technician work, Z: a vertically extending shaft.