JPH0436824Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of the Alcon type articulator.

(Prior art) The archon slot type articulator has a fixed condylar bulb, and therefore the condylar path is provided in the maxillary part, and in order to move this condylar path and the maxillary part along the condylar bulb, It has a structure that prevents left and right deviations when fixing the upper jaw (centrilock) (see Utility Model Publication No. 54-6314 and Publication No. 57-50008).

(Technical issue) The device described in the former publication has a complicated structure in which the hook locks the engagement pin on the maxillary side, and the engagement claw on the maxillary side locks the base on the mandibular side. It was not easy to put on and take off, and because the condylar bulb was attached to the upper and lower shafts, it had the disadvantage that the upper jaw could not be opened wide. The latter design uses the condylar axis as a horizontal axis, so the maxilla can be opened wide, but it is necessary to provide a spring plate on the condylar road plate to press the condylar bulb, and the maxillary part can be removed using a spring plate. This can only be done after the pressure from the plate is released by operating a lever. Furthermore, there was a risk that the elastic effect of the spring plate would weaken and the holding force would be insufficient, or that the spring plate would be deformed or damaged if it was repeatedly attached and detached.

The present invention was developed to solve the above-mentioned drawbacks and problems.The purpose of this invention is to have an extremely simplified structure, which allows the upper jaw to be attached and detached with a single touch operation, and which also allows the upper jaw to be opened wide. An object of the present invention is to provide an archon type articulator that does not cause erroneous operation.

(Technical Means) The purpose is to include a lower jaw part 10 and an upper jaw part 20 disposed thereon, and the left and right supports 1 of the lower jaw part 10.
The condylar balls 13 and 14 provided on the upper part of the maxillary parts 1 and 12 pivotally support the condyle channels 21 and 22 provided on the left and right sides of the maxillary part 20, thereby allowing the front part of the maxillary part 20 to move up and down. The upper jaw part 20 is provided with a latch shaft 23 that is combined with the mandibular part 10 and extends in the left and right condylar tract directions, while the surface 15 on which this latch shaft 23 is supported is
Install the holding bracket 16 between the left and right columns,
The latch arm 18, which is provided with an engaging means on the front upper part for engaging the latch shaft 23, is attached to the bracket 1.
6 can be achieved by a rotatably pivoted configuration.

(Example) A description will be given below with reference to the drawings. The lower jaw part 10 of the illustrated articulator has a pair of pillars 11 and 12 that rise upward rearward and leftward, and a frame member 19 that connects these pillars at their upper ends, and projects upwardly from the left and right pillars. Condylar shafts 13a, 14a are provided inside the provided posts 11a, 12a, respectively, and project toward the other, and condylar balls 13, 14 are attached to the tips thereof, respectively.

A bracket 16 is attached to the center of the frame 19, and the upper surface 15 of this bracket 16 corresponds to the lower surface of the latch shaft 23 when the maxillary portion 20 is pivotally supported on the condylar balls 13, 14 through the condylar channels 21, 22. is set to a height that matches the The condyle tracts 21 and 22 are the maxillary part 20
Condyle tract member 2 with a substantially U-shaped side surface attached to the left and right sides of the
5,26. Both members 25, 26
A latch shaft 23 extending in the direction of the left and right condylar tracts is provided in the space 24 between them.

A latch arm 18 having a size to fit into the space 24 is pivotally supported on the bracket 16 by a pivot 27, so that it can be pivoted rearward from an upwardly standing position. The latch arm 18 has a substantially U-shaped cross section and is made of phosphor bronze or other material having a certain degree of tenacity and springiness. The arm 18 includes means for engaging with the latch shaft 23.
Arc-shaped notches 31 and 32 open to the front are formed,
The arc is offset forward from the arm pivot 27 by a distance d, so that the latch shaft 2
The engagement force is also set to increase as the engagement with 3 progresses (Fig. 5). Note that the dimension d is exaggerated. 31a and 32a indicate engaging edges with the latch shaft 23. Note that 30 is an operating lever for the latch arm 18.

(Function) In the above configuration, the maxillary part 20 has its condylar path 2.
1 and 22 are engaged with the condylar bulbs 13 and 14 of the mandibular portion 10, they are combined into the state shown in FIGS. 1 and 2. At this time, the latch arm 18 of the lower jaw part 10 is in the state shown in FIG. Moreover, since the latch shaft 23 is supported in contact with the upper surface 15 of the bracket, various moving operations can be performed stably without anxiety.

Next, when the operating lever 30 is turned upward, the notches 31 and 32 of the latch arm 18, which is the engaging means, intersect with the latch shaft 23, and the engaging edges 31a and 32a engage with the latch shaft 23 (Fig. 4). Since the engagement force increases in proportion to the force pushing the latch arm 23, the latch shaft, that is, the upper jaw part 20 is fixed to the lower jaw part 10, and there is no possibility of displacement, and a strong central locking state is completed.

To release the lock according to operational needs, all you have to do is push down the operating lever 30.
The state shown in the figure can be returned to the state shown in the figure, and during this time the latch shaft 23 is supported by the upper surface 15 of the bracket, so it is stable, and the notches 31 and 32 are arranged in circular arcs so that the engagement force with the latch shaft 23 gradually weakens. Therefore, the latch shaft 23 will not move when the lock is released. Moreover, the upper jaw part 20 can be opened very widely.

(Effects) Therefore, the present invention has an extremely simplified structure, which allows the center to be locked and unlocked with a one-touch operation, and the lock state is ideal, and there is a sense of stability before and after operation. A remarkable practical effect is exhibited, such as there being no room for erroneous operation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an exploded perspective view, FIG. 2 is an assembled perspective view, and FIGS. 3 and 4.
The figure is a side sectional view of the main part, and FIG. 5 is a mechanism explanatory diagram. 10... lower jaw, 11, 12... strut, 13,
14... Condylar bulb, 15... Supporting surface, 16... Bracket, 20... Upper jaw, 21, 22... Condylar tract,
23...Latch axis.

Claims (1)

[Scope of utility model registration request] The maxillary part 20 is equipped with a lower jaw part 10 and an upper jaw part 20 arranged thereon, and the upper jaw part 20 is
A latch shaft 23 which pivotally supports the condylar passages 21 and 22 provided on the left and right sides of the condylar passage, thereby combining the maxillary part 20 with the mandibular part 10 so that the front part can move up and down, and extending in the direction of the left and right condylar passages. is provided on the upper jaw part 20, while a bracket 16 having a surface 15 on which the latch shaft 23 is supported is installed between the left and right supports, and the latch shaft 23 is
3. An archon type articulator comprising a latch arm 18, which is provided on the front upper part and is rotatably supported on the bracket 16.