JP7013022B2 - Holding mechanism of dental work model - Google Patents

Description

The present invention relates to a holding mechanism of a dental work model for attaching a dental work model used in dental treatment or the like to an articulator.

An articulator is used to make a dental prosthesis from a dental work model (see, for example, Patent Document 1). This articulator has a fixing plate on which a dental work model is placed, a one-sided holding wall provided at one end of the fixing plate, and another side holding provided at the other end of the fixing plate. It has a wall. An upper plate and a lower plate are movably arranged at the other end of the fixing plate, a fixing screw is screwed to the lower plate through the upper plate, and the other side holding wall is attached to the upper plate. There is. Further, the one-sided holding wall is provided with a one-sided locking convex portion protruding toward the other-side holding wall, and the other-side holding wall is provided with the other-side locking convex portion protruding toward the one-sided holding wall. ing.

In connection with this configuration on the articulator side, one end of the support base of the dental work model is provided with a one-sided locking recess corresponding to the one-sided locking protrusion on the articulator side, and the other end. The portion is provided with a locking recess on the other side corresponding to the locking protrusion on the other side on the articulator side.

When attaching the dental work model to this articulator, loosen the fixing screw on the articulator side to make the upper plate and lower plate movable, and in this state, lock one side of the support base on the dental work model side. The recess is attached to the one-sided locking convex part of the one-sided holding wall on the articulator side, and the upper plate and the lower plate are further moved via the fixing screw to fit the other-side holding wall into the other-side locking recess of this support base. After inserting the locking protrusion on the other side, this fixing screw is tightened to fix it. In such a mounting state, the one-sided locking recess is locked to the one-sided locking protrusion of the one-sided holding wall on the articulator side on one end side of the dental work model, and the other-side locking recess is locked on the other end side. Is locked to the other side locking protrusion of the other side holding wall on the articulator side, whereby the dental work model can be detachably fixed to the articulator.

Japanese Unexamined Patent Publication No. 2006-255391

However, the holding mechanism of the dental work model using the above-mentioned articulator has the following problems. That is, when attaching the dental work model to the articulator, loosen the fixing screw on the articulator side and place the one-sided locking recess on the base on the dental work model side on the one-sided locking protrusion on the one-sided holding wall on the articulator side. The upper plate and the lower plate are moved to insert the other side locking protrusion of the other side holding wall into the other side locking recess of this support base, and then tighten this fixing screw to fix it. It will be like. Therefore, in the mounting work of such a dental work model, it is necessary to perform the mounting work with both hands, and there are many mounting work steps for mounting the dental work model, and this mounting work is complicated.

An object of the present invention is to provide a holding mechanism for a dental work model that allows the dental work model to be attached with one touch with one hand.

The holding mechanism of the dental work model according to claim 1 of the present invention includes a dental work model provided with a fixing plate on which the tooth profile model is fixed and a support base for supporting the fixing plate, and the above. In the holding mechanism of the dental work model composed of the model holder provided on the articulator side for holding the dental work model.
The tooth model is a partial type, and in this regard, the support base has a base-side upper wall having a support area for supporting the fixing plate and an outer periphery of the base-side upper wall. The model holder has a base side peripheral side wall extending downward from the portion, and the model holder is downward from the outer peripheral portion of the holder side upper wall that supports the support base of the dental work model and the holder side upper wall. It has an extending holder side peripheral wall and
Further, on either the upper surface of the upper wall on the holder side or the inner wall of the upper wall on the base side, a pair of guide means for guiding the support base in a predetermined direction to the model holder is provided. At the same time, on the other side of them, a pair of guided ribs guided by the pair of guide means is provided.
Further, either one of the model holder and the support base is provided with a pair of receiving means for holding the support base at the support position of the model holder, and the other of them is provided with a pair of receiving means. A pair of protrusions that are accepted by the pair of receiving means are provided.
When the support base is moved in the predetermined direction and positioned at the support position of the model holder, the predetermined position of the support base with respect to the model holder is caused by the action of the pair of guide means and the pair of guided ribs. The movement in the direction perpendicular to the direction is prevented, and the movement of the support base with respect to the model holder in the predetermined direction and the movement in the upward direction by the action of the pair of receiving means and the pair of protrusions. Is characterized by being blocked.

Further, in the holding mechanism of the dental work model according to claim 2 of the present invention, the support area and the fixing plate of the support base are each formed horizontally, and the side circumference of the base in the support base is formed. The pair of protrusions are provided on the inner surfaces of both ends of the side wall, and the pair of receiving means are provided at both ends of the upper wall on the holder side of the model holder corresponding to the pair of protrusions. The receiving means has a contact wall portion extending upward from the upper surface of the holder-side upper wall and a horizontal wall portion extending horizontally from the upper end portion of the contact wall portion, and the support base is provided. When the model holder is moved in a predetermined direction and positioned at the support position of the model holder, the pair of protrusions on the support base side hits the corresponding contact wall portions of the pair of receiving means on the model holder side. It is characterized in that it is in contact with the pair and is positioned below the corresponding horizontal wall portion of the pair of receiving means.

Further, in the holding mechanism of the dental work model according to claim 3 of the present invention, the pair of guide means is provided on the upper surface of the holder-side upper wall of the model holder, and the pair of guided ribs support the model holder. The pair of guide means is provided on the inner surface of the base side upper wall of the base, and the pair of guide means is composed of a pair of guide members extending in a predetermined direction, and a guide groove is defined between the pair of guide members. The pair of guided ribs are provided corresponding to the guide grooves of the pair of guide means, and the pair of guided ribs can be moved in the predetermined direction in the guide grooves of the pair of guide means. It is characterized by being inserted.

Further, in the holding mechanism of the dental work model according to claim 4 of the present invention, the pair of guide means is provided on the upper surface of the upper wall on the holder side of the model holder, and is composed of a guide member extending in a predetermined direction. The pair of guided ribs are provided on the inner surface of the base-side upper wall of the support base corresponding to the pair of guide means on the model holder side, and the pair of guided ribs are provided. The rib is characterized in that it is movably positioned outside or inside the guide member of the pair of guide means.

Further, in the holding mechanism of the dental work model according to claim 5 of the present invention, a plurality of dowel pins are provided at intervals on the fixing plate, and the upper wall on the base side of the support base is provided with a plurality of dowel pins. A plurality of insertion holes are provided corresponding to the plurality of dowel pins, and a plurality of tubular wall portions for defining the plurality of insertion holes are provided on the inner surface of the base side upper wall, and further, the support. A plurality of reinforcing ribs connected to the plurality of tubular wall portions are provided on the base side peripheral side wall of the base, and a part of the plurality of reinforcing ribs is the pair of guided ribs. It is characterized by functioning as.

According to the holding mechanism of the dental work model according to claim 1 of the present invention, on the upper surface of the upper wall on the holder side of the model holder (or the inner surface of the upper wall on the base side of the support base) with respect to the model holder. A pair of guide means for guiding the support base in a predetermined direction is provided, and a pair of guide means is provided on the inner surface of the base side upper wall of the support base (or the upper surface of the holder side upper wall of the model holder). A pair of guided ribs are provided, and the model holder (or support base) is provided with a pair of receiving means for holding the support base at the support position of the model holder, and also supports the model holder. The base (or model holder) is provided with a pair of protrusions that are accepted by the pair of receiving means. Since it is configured in this way, when this support base is moved in a predetermined direction and positioned at the support position of the model holder, the support base with respect to the model holder is provided by the action of the pair of guide means and the pair of guided ribs. The movement in the direction perpendicular to the predetermined direction is prevented, and the movement of the support base with respect to the model holder in the predetermined direction and the upward movement are prevented by the action of the pair of receiving means and the pair of protrusions. Thus, the support base (that is, the dental work model) can be reliably held at the support position of the model holder by a simple operation of moving the support base in a predetermined direction.

Further, according to the holding mechanism of the dental work model according to claim 2 of the present invention, a pair of protrusions are provided on the inner surfaces of both ends of the peripheral side wall on the base side of the support base, and the holder side in the model holder. A pair of receiving means is provided at both ends of the upper wall, and the pair of receiving means includes a contact wall portion extending upward from the upper surface of the holder-side upper wall and a horizontal portion extending horizontally from the upper end portion of the contact wall portion. Since it has a wall portion, when the support base is moved in a predetermined direction and positioned at the support position of the model holder, the pair of protrusions on the support base side correspond to the pair of receiving means on the model holder side. It abuts on the abutment wall and is located below the corresponding horizontal wall of the pair of receiving means, which ensures that the support base is prevented from moving in a predetermined direction and moving upward. be able to.

Further, according to the holding mechanism of the dental work model according to claim 3 of the present invention, the pair of guide means is provided on the upper surface of the upper wall on the holder side of the model holder, and the pair of guided ribs is the support base. Since these guide means are provided on the inner surface of the upper wall on the base side and are composed of a pair of guide members extending in a predetermined direction, the pair of guided ribs on the support base side is a pair of guide means on the model holder side. It is movably inserted into the guide groove in a predetermined direction, so that the support base can be moved along the guide groove, and at the support position of the model holder, the support base is predetermined by such a pair of guide means. It is possible to surely prevent the movement in the direction perpendicular to the direction.

Further, according to the holding mechanism of the dental work model according to claim 4 of the present invention, the pair of guide means is provided on the upper surface of the upper wall on the holder side of the model holder, and is composed of a guide member extending in a predetermined direction. Further, the pair of guided ribs are provided on the inner surface of the base-side upper wall of the support base, and these guided ribs are movably mounted on the outside (or inside) of the guide member of the pair of guide means, so that the support is supported. The base can be moved in a predetermined direction along a pair of guide means (guide members), and at the support position of the model holder, the pair of guide means is perpendicular to the predetermined direction of the support base. It is possible to surely prevent the movement in the direction.

Further, according to the holding mechanism of the dental work model according to claim 5 of the present invention, a plurality of insertion holes corresponding to a plurality of dowel pins are provided on the base-side upper wall of the support base, and the support base is provided with a plurality of insertion holes. A plurality of tubular wall portions for defining a plurality of insertion holes are provided on the inner surface of the base side upper wall, and a plurality of reinforcing ribs connected to the plurality of tubular wall portions are provided to reinforce these. Since a part of the ribs functions as a pair of guided ribs, the reinforcing ribs can be used as guided ribs for moving them in a predetermined direction.

A side view showing an example of an articulator provided with an embodiment of a holding mechanism for a dental work model according to the present invention. A plan view showing a state in which a support base for a dental work model is attached to a model holder. FIG. 2 is a cross-sectional view taken along the line III-III. FIG. 2 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 2 is a perspective view of the support base of the dental work model in FIG. 2 as viewed from the upper surface side. A perspective view of the support base of FIG. 5 as viewed from the bottom surface side. The perspective view of the model holder in FIG. 2 as seen from the upper surface side. It is explanatory drawing which shows the positional relationship between the pair of guide means on the model holder side, and the pair of guided ribs on the support base side in the holding mechanism of the dental work model of FIG. 1. Explanatory drawing which shows the positional relationship in the deformed form of a pair of guide means on a model holder side and a pair of guided ribs on a support base side. Explanatory drawing which shows the positional relationship in the other deformation form of the pair of guide means on the model holder side and the pair of guided ribs on the support base side.

Hereinafter, various embodiments of the holding mechanism of the working model for dental technicians according to the present invention will be described with reference to the accompanying drawings. First, an example of an articulator provided with a holding mechanism for a dental work model of one embodiment will be described with reference to FIGS. 1 to 8.

In FIG. 1, the illustrated articulator 2 includes a lower mounting frame 4 and an upper mounting frame 6 that are rotatably mounted on each other, and a lower model holder mounting body 8 is mounted on the lower mounting frame 4. The upper model holder mounting body 10 is mounted on the upper mounting frame 6. Then, the lower model holder 12 is attached to the lower model holder mounting body 8, and the lower dental work model 14 is attached to the lower model holder 12 as described later. Further, the upper model holder 16 is attached to the upper model holder mounting body 10, and the upper dental work model 18 is attached to the upper model holder 16.

The lower model holder mounting body 8 and the lower model holder 12 and the upper model holder mounting body 10 and the upper model holder 16 may have substantially the same configuration, and the lower side to the lower model holder 12 The holding mechanism of the dental work model 14 and the holding mechanism of the upper dental work model 18 to the upper model holder 16 may have substantially the same configuration, and the configuration of the lower model holder 12 and the like will be described below. do. In this description, the "lower" component and the upper component are substantially the same, and therefore, the "model holder" and the like and the "lower" and "upper" are simply omitted.

In this embodiment, the lower model holder 12 is attached to the lower mounting frame 4 via the lower model holder mounting body 8, but the model holder mounting body 8 is omitted and the lower model holder is omitted. 12 may be directly attached to the lower mounting frame 4. Further, although the upper model holder 16 is attached to the upper mounting frame 6 via the upper model holder mounting body 10, the upper model holder mounting body 10 is omitted, and the upper model holder 16 is directly attached to the upper mounting frame 10. It may be attached to the target.

With reference to FIGS. 2 to 4, the illustrated dental work model 14 (18) has a support base 20 attached to the model holder 12 (16) and a fixing plate 22 supported by the support base 20. The tooth profile model 24 is fixed to the fixing plate 22 with, for example, an adhesive. In this embodiment, the tooth profile model 24 is applied to, for example, a partial type having five tooth profiles.

When the support base 20 is described with reference to FIGS. 5 and 6, the support base 20 shown in the figure includes a support base main body 26, and the support base main body 26 is made of, for example, a synthetic material such as polyethylene resin or polypropylene resin. Formed from resin. The support base main body 26 is elongated in the left-right direction in FIGS. 2 and 3 and in the direction perpendicular to the paper surface in FIG. 3, that is, the base side upper wall 28 formed horizontally, and the base side upper wall. It has a base side peripheral side wall 30 extending downward from the outer peripheral portion of 28. In this embodiment, the entire upper surface of the base side upper wall 28 (the portion defining the upper surface of the support base 20) is the support area 32 for supporting the fixing plate 22 as can be understood from FIG. Functions as.

The support area 32 (base side upper wall 28) of the support base main body 26 has a longitudinal direction thereof (left-right direction in FIGS. 2 and 3, direction perpendicular to the paper surface in FIG. 3, lower left in FIGS. 5 and 6). Five outer insertion holes 34 and five inner insertion holes 35 are provided at intervals from the upper right direction to the upper right, and these insertion holes 34 and 35 are in the width direction (direction perpendicular to the longitudinal direction). It is provided in two rows at intervals in the vertical direction in FIG. 2, the direction perpendicular to the paper surface in FIG. 3, the left-right direction in FIG. 4, and the direction from the lower right to the upper left in FIGS. 5 and 6. ..

In this embodiment, as shown in FIGS. 2 and 4, the two rows of insertion holes 34, 35 (outer insertion holes 34 and inner insertion holes 35) are located on one side of the center line S in the width direction of the support base 20. When the insertion holes 34 and 35 are arranged on one side in this way, the dental model 24 is cut from this one side (upper side in FIG. 2 and left side in FIG. 4).

Further, in the internal space 33 formed inside the peripheral side wall 30 on the base side, cylindrical wall portions 36, 37 extending downward from the inner surface of the upper wall 28 on the base side corresponding to the insertion holes 34, 35 are provided. The insertion holes 34, 35 are provided so as to penetrate the base side upper wall 28 and the tubular wall portions 36, 37, and in this form, the tubular wall portions 36, 38 are integrated. It is provided in a connected state (see FIGS. 3 and 4). The insertion holes 34 and 35 are formed in a tapered shape in which the inner diameter gradually decreases from the upper end portion to the lower end portion of the cylindrical wall portions 36 and 37.

In this form, reinforcing ribs 70 are provided corresponding to these tubular wall portions 36 and 37, and the reinforcing ribs 70 are the base side peripheral side walls 30 of the support base 20 (specifically, one side wall thereof). One side rib portion 70a connecting the portion) and the tubular wall portion 36, and the other side rib connecting the base side peripheral side wall 30 (specifically, the other side wall portion) and the other tubular wall portion 37. It has a portion 70b and extends downward from the inner surface of the base-side upper wall 8 of the support base 20 to the tips of the tubular wall portions 36 and 37.

In this embodiment, the spacing between the insertion holes 34 and 35 is small, and therefore the cylindrical wall portion 36 on one side and the cylindrical wall portion 37 on the other side are connected, but the spacing between the insertion holes 34 and 35 is small. When it is large, the cylindrical wall portion 36 on one side and the tubular wall portion 37 on the other side are provided so as to be separated from each other, and the tubular wall portion 36 on one side and the tubular wall portion 37 on the other side are separated by an intermediate rib portion. You may try to connect. Further, in addition to the reinforcing ribs 70 connected via the cylindrical wall portions 36 and 37, reinforcing ribs (not shown) for directly connecting the facing wall portions of the base side peripheral side wall 30 are provided. May be good.

Further, a pair of protrusions 72, 73 protruding inward are provided at both ends (end wall portions in the longitudinal direction thereof) of the base side peripheral side wall 30 of the support base 20. The pair of protrusions 72, 73 may have an appropriate shape, and are formed in a rectangular shape in this form. As will be described later, the support base 20 is placed at the support position of the model holder 12 (16) (in FIGS. 1 to 4). It is used when positioning and holding in the position shown).

One-sided engagement protruding upward with one-sided side portion (upper side portion in FIGS. 2 and 5 and left side portion in FIG. 4) on the upper surface (that is, the support region 32) of the base-side upper wall 28. The ridge 38 is provided, and the other side engaging ridge 40 projecting upward is provided on the other side (lower side in FIGS. 2 and 5 and right side in FIG. 4). Has been done. The one-side engaging ridge 38 and the other-side engaging ridge 40 are arranged so as to face each other, and are provided over substantially the entire length of the support base main body 26 in the longitudinal direction.

The one-sided engaging ridge 38 of the support base 20 (support base main body 26) is provided with a one-sided inclined protrusion 42 over almost the entire length thereof, and the one-sided inclined protrusion 42 is the one-sided engaging ridge 38. It extends inward from the inner side surface, and its upper surface is inclined downward toward the inside and extends to the upper surface of the base side upper wall 28 (see FIG. 4). Further, the other side engaging protrusion 40 of the support base 20 (support base main body 26) is provided with the other side inclined protrusion 44 over almost the entire length thereof, and the other side inclined protrusion 44 is provided with the other side inclined protrusion 44. It extends inward from the inner surface of the side engaging ridge 40, and its upper surface is inclined downward toward the inside and extends to the upper surface of the base side upper wall 28 (see FIG. 4).

In this embodiment, the one-sided inclined protrusion 42 is further provided with a plurality of one-sided engaging recesses 46 at intervals in the longitudinal direction thereof, and these one-sided engaging recesses 46 are the base-side upper walls of the support base main body 26. It extends to the top surface of 28. Further, in the other side inclined protrusion 44, a plurality of other side engaging recesses 48 are provided at intervals in the longitudinal direction thereof, and these other side engaging recesses 48 are support bases like the one side engaging recess 46. It extends to the upper surface of the base side upper wall 28 of the base body 26.

Further, on the outer peripheral surface of the peripheral side wall 30 on the base side of the support base main body 26, a positioning protrusion 50 is provided corresponding to the paired insertion holes 34 and 35. The positioning protrusions 50 are provided on both sides of the insertion holes 34 and 35 with the insertion holes 34 and 35 interposed therebetween. These positioning protrusions 50 have a positioning function for positioning a molding base frame (not shown) used when forming the fixing plate 22, and dowel pins 60 for cutting the dental model 24. It has a pin position display function indicating the arrangement position of 61 (see FIG. 4). In this form, positioning protrusions 51 are also provided on both end faces of the base side peripheral side wall 30.

Next, with reference to FIG. 4, the fixing plate 22 supported by the support region 32 of the support base 20 will be described. The illustrated fixing plate 22 includes a plate body 62 made of gypsum, which has a horizontally long shape corresponding to the shape of the upper wall 28 (that is, the support area 32) of the support base body 26. Have. Dowel pins 60, 61 are fixed to the fixing plate 22 corresponding to the insertion holes 34, 35 of the support base main body 26, and the tip end side of these dowel pins 60, 61 is inserted into the corresponding insertion holes 34, 35 (FIG. The tooth profile model 24 is fixed to the upper surface of the fixing plate main body 62 with an adhesive or the like (4 shows one set thereof). The dowel pins 60 and 61 are formed in a tapered shape in which the outer diameter gradually decreases from the base end portion to the tip end portion in correspondence with the insertion holes 34 and 35 being formed in a tapered shape.

On one side of the lower surface of the fixing plate 22 (that is, the plate body 62), a one-side engaging recess 64 is provided corresponding to the one-sided engaging ridge 38 on the support base 20 side, and the other side portion. The other side engaging ridge 66 is provided corresponding to the other side engaging ridge 40 on the support base 20 side, and the support base is provided on the lower surface of the fixing plate 22 (plate body 62). A one-sided inclined recess (not shown) is provided corresponding to the one-sided inclined protrusion 42 on the table 20 side, and the other-side inclined recess (not shown) is provided corresponding to the other side inclined protrusion 44.

Further, a plurality of one-sided engaging protrusions (not shown) are provided in the one-sided inclined recesses of the fixing plate 22 corresponding to the plurality of one-sided engaging recesses 46 provided in the one-sided inclined protrusions 42 on the support base 20 side. Is provided, and a plurality of other-side engaging protrusions (not shown) are provided in the other-side inclined recesses of the fixing plate 22 corresponding to the plurality of other-side engaging recesses 48 provided in the other-side inclined protrusions 44. Is provided.

Next, the model holder 12 (16) will be described with reference to FIGS. 2 to 4 and 7. The illustrated model holder 12 is a holder body 74 that is slightly larger than the support base 20 (support base body 26). The holder main body 74 is formed of a synthetic resin such as a polyethylene resin or a polypropylene resin, similarly to the support base main body 26. The holder body 74 has a holder-side upper wall 76 that is slightly larger than the outer shape of the base-side peripheral side wall 30 of the support base 20, and a holder-side peripheral side wall 78 that extends downward from the outer peripheral portion of the holder-side upper wall 76. Have.

In this embodiment, a pair of guide means 80 is provided on the holder-side upper wall 76 of the model holder 12 (holder body 74). Also referring to FIG. 8, the pair of guide means 80 is a pair of guide members arranged at intervals in the longitudinal direction of the holder body 74 (the direction from the lower left to the upper right in FIG. 7, and the left-right direction in FIG. 8). That is, it is composed of a guide member 82 arranged inside and a guide member 83 arranged outside. The pair of guide members 82 and 83 are moved in a predetermined direction (direction perpendicular to the longitudinal direction of the model holder 12 and in the direction from the lower right to the upper left in FIG. 7) when the support base 20 is mounted. A guide groove 84 extending in the vertical direction in FIG. 8) and extending in a predetermined direction between the guide members 82 and 83 is defined.

A specific reinforcing rib 70 (specifically, the other side rib portion 70b) is inserted into the guide groove 84 between the pair of guide members 82 and 83. In this embodiment, the other side rib portion 70b of the second of the five reinforcing ribs 70 from both outer sides (the second and fourth from the left side in FIG. 6) is the corresponding guide means 80. It is inserted into the guide groove 84 (see FIG. 8) and is moved along the guide groove 84. Therefore, in this embodiment, the specific reinforcing rib 70 constitutes a pair of guided ribs to be inserted into the pair of guide means 80.

It is preferable to provide the opening inclined surfaces 86, 87 that incline outward toward the tip at the portions of the tips of the pair of guide members 82, 83 that face each other, and by providing the opening inclined surfaces 86, 87. , The specific reinforcing rib 70 (guided rib) can be easily inserted into the guide groove 84. Instead of using a part of the plurality of reinforcing ribs as a pair of guided ribs, a dedicated guided rib may be provided on the inner surface of the base side upper wall 28 of the support base 20.

A pair of receiving means 88 are provided at both ends of the holder side upper wall 76 of the model holder 12 (holder body 74) corresponding to the pair of protrusions 72 on the support base 20 side, and these receiving means 88 are provided. Is composed of a receiving member 90 that receives the protrusion 72 on the corresponding support base 20 side. Each receiving member 90 has a main body portion 92 extending upward from the upper surface of the holder side upper wall 76, and a contact wall portion 94 projecting outward is provided on the side portion of the main body portion 92, and the contact wall portion 94 is provided. 94 also extends upward from the holder side upper wall 76. Further, a horizontal wall portion 96 is provided over the upper ends of the main body portion 92 and the contact wall portion 94, and the protrusion 72 on the support base 20 side is provided by the main body portion 92, the contact wall portion 94, and the horizontal wall portion 96. Specify the receiving recess to receive. As will be understood from the description below, when sufficient strength can be secured, the main body portion 92 may be omitted, and the receiving means 88 may be composed of the contact wall portion 94 and the horizontal wall portion 96.

Next, the attachment of the dental work model 14 (support base 20) to the model holder 12 in the above-mentioned articulator 2 will be described. To attach the dental work model 14, a specific reinforcing rib 70 (specifically) on the side of the dental work model 14 (support base 20) in the guide groove 84 of the pair of guide means 80 from above the model holder 12. Is placed on the holder side upper wall 76 of the model holder 12 so as to insert the other side rib portion 70b). When placed in this way, as can be seen from FIGS. 3, 4, and 8, the specific reinforcing rib 70 on the support base 20 side is placed in the guide groove 84 of the pair of guide means 80 on the base side upper wall 76. It is movably inserted in a predetermined direction, and the base side peripheral side wall 30 of the support base 20 is placed and supported on the holder side upper wall 76 of the model holder 12.

Then, in this mounted state, the dental work model 14 (support base 20) is slid and moved in a predetermined direction to support the holder main body 74 (specifically, the holder side upper wall 76) (FIGS. 1 to 1). Positioned at the position shown in 4). When moved in this way, the pair of protrusions 72 on the support base 20 side are received by the receiving recesses of the pair of receiving means 88 on the model holder 12 side, and the pair of protrusions 72 are the contact wall portions of the corresponding receiving means 88. It abuts on 94 and is positioned below the horizontal wall 96 of the corresponding receiving means 88.

In this receiving state (that is, in the state of being positioned at the support position), the movement of the pair of protrusions 72 on the support base 20 side in a predetermined direction is blocked by the contact wall portion 94 of the pair receiving member 88, and these protrusions are also blocked. The upward movement of the portion 72 is blocked by the horizontal wall portion 96 of the pair of receiving members 88. Further, the movement of the specific reinforcing rib 70 (the rib portion 70b on the other end side) on the support base 20 side in the direction perpendicular to the predetermined direction is blocked by the pair of guide means 80 (pair of guide members 82, 83). Therefore, the support base 20 (that is, the dental work model 14) can be reliably placed and supported at the support position of the model holder 12.

In this way, the dental work model 14 (support base 20) is inserted into the guide groove 84 of the pair of guide means 80 on the model holder 12 side so that the specific reinforcing rib 70 on the support base 20 side is inserted into the model holder. By placing the support base 20 on the model holder 12 and moving the support base 20 in a predetermined direction in the mounted state, the support base 20 can be securely attached to the model holder 12, and the attachment operation can be easily performed with one hand. The efficiency of mounting work on the holder 12 can be improved.

In addition, in order to make this mounting support more reliable, the inner surface (the surface in contact with the protrusion 72) of the horizontal wall portion 96 of the receiving member 90 is directed to the downstream side in a predetermined direction (in other words, the contact wall portion 94). It is configured to be inclined so as to be slightly close to the holder side upper wall 76 (toward the side), or the upper surface of the protrusion 72 (the surface in contact with the horizontal wall portion 96) is directed to the downstream side in a predetermined direction (in other words). Then, it is preferable to configure it so as to be slightly inclined upward (toward the contact wall portion 94 side), and by such a configuration, when it is moved to a predetermined support position, the pair of receiving members 90 are horizontal. The wall portion 96 elastically presses the pair of protrusions 72 to some extent, whereby the dental work model 14 (support base 20) can be reliably placed and supported by the model holder 12.

In the above-described embodiment, the pair of guide means 80 is composed of a pair of guide members 82 and 83, respectively, but these guide means can also be configured as shown in FIG. 9 or FIG. In FIG. 9, in this modified form, the pair of guide means 80A is composed of one guide member 82A (inner guide member 82 in the guide means 80 of the above-described embodiment). The other configurations in this variant are substantially identical to the embodiments described above.

In this configuration, when the dental work model 14 (support base 20) is placed on the model holder 12, a pair of specific reinforcing ribs 70 (the other side rib portions 70b) (guided ribs). Is located outside the guide member 82A of the pair of guide means 80A. Then, when moving to the support position, the pair of specific reinforcing ribs 70 are moved along the outer surface of the guide member 82A of the pair of guide means 80A, and the movement in the direction perpendicular to the predetermined direction is these guides. It is blocked by the member 82A, and even if it is configured in this way, the same action and effect as described above can be achieved.

Further, in FIG. 10, in another modification, the pair of guide means 80B is composed of one guide member 83B (the outer guide member 83 in the guide means 80 of the above-described embodiment). Other configurations in this other variant are substantially identical to the embodiments described above.

In this configuration, when the dental work model 14 (support base 20) is placed on the model holder 12, a pair of specific reinforcing ribs 70 (the other side rib portions 70b) (guided ribs). Is positioned inside the guide member 83B of the pair of guide means 80B. Then, when moving to the support position, the pair of specific reinforcing ribs 70 are moved along the inner surface of the guide member 83B of the pair of guide means 80B, and the movement in the direction perpendicular to the predetermined direction is these guides. It is blocked by the member 83B, and even if it is configured in this way, the same action and effect as described above can be achieved.

Although the embodiment of the holding mechanism of the dental work model according to the present invention has been described above, the present invention is not limited to such an embodiment, and various changes or modifications can be made without departing from the scope of the present invention. Is.

For example, in the above-described embodiment, it has been described by applying it to a dental work model 14 (support base 20) in which insertion holes 34 and 35 are provided in two rows (dowel pins 60 and 61 are provided in two rows). The present invention is not limited to such a form, and can be similarly applied to a dental work model (support base) in which these insertion holes are provided in one row (dowel pins are provided in one row).

Further, for example, in the above-described embodiment, a pair of guided ribs (specific reinforcing ribs 70) are provided on the support base 20 side, and a pair of guide means 80 (80A, 80B) are provided on the model holder 12 (16) side. On the contrary, a pair of guided ribs may be provided on the model holder 12 (16) side, and a pair of guide means 80 (80A, 80B) may be provided on the support base 20 side. ..

Further, in the above-described embodiment, the pair of protrusions 72 are provided on the support base 20 side, and the pair of receiving means 88 are provided on the model holder 12 side. On the contrary, the pair of protrusions 72 are provided. It may be provided on the model holder 12 side and a pair of receiving means 88 may be provided on the support base 20 side.

2 Articulator 12, 16 Model holder 14, 18 Dental work model 20 Support base 22 Fixing plate 28 Base side upper wall 30 Base side peripheral side wall 60, 61 Dowel pin 70 Reinforcing rib (guided rib)
72 Protrusion 76 Holder side upper wall 78 Holder side peripheral side wall 80 Guide means 82, 82A, 83, 83B Guide member 88 Receiving means 90 Receiving member 94 Abutment wall part 96 Horizontal wall part

Claims (5)

A dental work model provided with a fixing plate on which the tooth profile model is fixed and a support base for supporting the fixing plate, and a model holder provided on the articulator side for holding the dental work model. In the holding mechanism of the dental work model composed of
The tooth model is a partial type, and in this regard, the support base has a base-side upper wall having a support area for supporting the fixing plate and an outer periphery of the base-side upper wall. The model holder has a base side peripheral side wall extending downward from the portion, and the model holder is downward from the outer peripheral portion of the holder side upper wall that supports the support base of the dental work model and the holder side upper wall. It has an extending holder side peripheral wall and
Further, on either the upper surface of the upper wall on the holder side or the inner wall of the upper wall on the base side, a pair of guide means for guiding the support base in a predetermined direction to the model holder is provided. At the same time, on the other side of them, a pair of guided ribs guided by the pair of guide means is provided.
Further, either one of the model holder and the support base is provided with a pair of receiving means for holding the support base at the support position of the model holder, and the other of them is provided with a pair of receiving means. A pair of protrusions that are accepted by the pair of receiving means are provided.
When the support base is moved in the predetermined direction and positioned at the support position of the model holder, the predetermined position of the support base with respect to the model holder is caused by the action of the pair of guide means and the pair of guided ribs. The movement in the direction perpendicular to the direction is prevented, and the movement of the support base with respect to the model holder in the predetermined direction and the movement in the upward direction by the action of the pair of receiving means and the pair of protrusions. A holding mechanism for a dental work model characterized by being blocked. The support area and the fixing plate of the support base are formed horizontally, respectively, and the pair of protrusions are provided on the inner surfaces of both ends of the peripheral side wall on the base side of the support base, and the model holder. The pair of receiving means are provided at both ends of the holder-side upper wall corresponding to the pair of protrusions, and the pair of receiving means is a contact wall portion extending upward from the upper surface of the holder-side upper wall. And a horizontal wall portion extending in the horizontal direction from the upper end portion of the contact wall portion, and when the support base is moved in the predetermined direction and positioned at the support position of the model holder, the support The pair of protrusions on the base side abut on the corresponding contact wall portion of the pair of receiving means on the model holder side, and are positioned below the corresponding horizontal wall portion of the pair of receiving means. The holding mechanism for a dental work model according to claim 1, wherein the dental work model is held. The pair of guide means is provided on the upper surface of the holder-side upper wall of the model holder, and the pair of guided ribs are provided on the inner surface of the base-side upper wall of the support base, and the pair. The guide means is composed of a pair of guide members extending in a predetermined direction, a guide groove is defined between the pair of guide members, and the pair of guided ribs correspond to the guide groove of the pair of guide means. The dental work model according to claim 1 or 2, wherein the pair of guided ribs is provided and is movably inserted into the guide groove of the pair of guide means in the predetermined direction. Holding mechanism. The pair of guide means is provided on the upper surface of the upper wall on the holder side of the model holder and is composed of a guide member extending in a predetermined direction, and the pair of guided ribs is the base of the support base. The pair of guide means on the model holder side is provided on the inner surface of the side upper wall so as to be movable outside or inside the guide member of the pair of guide means. The holding mechanism for a dental work model according to claim 1 or 2, wherein the dental work model is held. The fixing plate is provided with a plurality of dowel pins at intervals, and the upper wall of the support base on the base side is provided with a plurality of insertion holes corresponding to the plurality of dowel pins, and the base is provided with a plurality of insertion holes. A plurality of tubular wall portions for defining the plurality of insertion holes are provided on the inner surface of the side upper wall, and further, the plurality of tubular wall portions on the base side peripheral side wall of the support base are provided. The dental work model according to claim 3 or 4, wherein a plurality of reinforcing ribs to be connected are provided, and a part of the plurality of reinforcing ribs functions as the pair of guided ribs. Holding mechanism.

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