JPH0431043Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measuring instrument called a "facebow" or facebow. As is well known to those skilled in the art, this measuring instrument measures the position of the mandible relative to the skull, temporomandibular joints, or external auditory canal.

The object of the invention is to provide an improved measuring instrument of the type described above, which is easy to use and simple in construction.

Hereinafter, a detailed description will be given with reference to the accompanying drawings.

Referring to FIG. 1, the measuring instrument shown here, ie, a face bow, has a bow part 2 consisting of a rod member 1 bent into a substantially U-shape, and a well-known condylar structure at the ends of both legs of the U-shaped rod member 1. It includes a head rod fixing means 3 and two clamps 4 attached to a bar portion 1A corresponding to a U-shaped horizontal bar.

Each of the condylar rod fixing means 3 includes an enlarged head 5, a through hole which is provided transversely to the axis of the enlarged head and receives the condylar rod 6, and a through hole which is provided in a direction transverse to the axis of the enlarged head and which receives a condylar rod 6, and a through hole which is provided in a direction transverse to the axis of the enlarged head and which receives a condylar rod 6. and a fixing screw 7 screwed into a screw hole (not shown) provided from the outer end surface of the enlarged head. As is well known, the condylar rod 6 has a drawing nail 8 at its inner end.
are provided, which can be covered with earplugs 9.

An example of the structure of the clamp 4 is shown in FIG. Although a clamp 4 for a bite fork device 10 is shown here, it should be understood that this can also be applied to an orbital pointer 11.

In FIG. 7, the clamp 4 has a fixed screw portion 1.
4, an intermediate portion 13 with the fixing screw portion 14 screwed onto the top, and a bottom portion 12 screwed with the bottom of the intermediate portion.
and includes. The intermediate portion 13 is provided in a direction perpendicular to the mounting hole 40 through which the bar portion 1A of the bar member 1 passes, and the mounting hole 40 as can be seen from FIG. 1, which is not visible in FIG. 1
It has a support hole through which the fork branch 21 of No. 0 passes. The intermediate portion 13 has a central inner diameter hole 41 with a circular cross section that opens at the bottom thereof, and this central inner diameter hole 41 has a longitudinal axis extending in a direction perpendicular to the axes of the support hole and the mounting hole 40. have Center inner diameter hole 4
1 is threaded at the bottom, into which the reduced diameter threaded portion 12A of the bottom portion 12 is screwed. The intermediate portion 13 includes two pairs of split sleeve pieces 42 housed within the central bore 41 , each split sleeve piece 42 having a circular shape when viewed in a direction perpendicular to the longitudinal axis of the central bore 41 . It has a cross-sectional shape with an outer diameter slightly smaller than the diameter of the central inner diameter hole 41, and a groove 43 with a semicircular cross section is formed on the mating surface, so that when each pair of split sleeve pieces 42 are mated, A circular hole is formed in which a rod or shaft (for example, the fork support rod 21 of the bite fork device 10) having a circular cross section is inserted. Such a split sleeve piece 42
are stacked in the central bore along its longitudinal axis. At this time, the split sleeve pieces 42 are arranged so that the axis of the circular hole formed by the groove 43 of one pair of split sleeve pieces 42 coincides with the axis of the corresponding support hole or attachment hole. The intermediate portion 13 has a screw hole 44 having a longitudinal axis that coincides with the longitudinal axis of the central inner diameter hole 41 on the end surface of the top thereof.
is formed, and the bottom end of this screw hole 44 opens into the central inner diameter hole 41. This screw hole 44 has
A screw shaft 45 protruding perpendicularly from the bottom surface 14A of the fixed screw portion 14 is threadedly engaged with the end surface of the upper split sleeve piece 42 of the upper pair of split sleeve pieces 42 as seen in FIG. When engaged, the two pairs of split sleeve pieces 42 can be pressed toward the bottom 12. Therefore, the fixing screw portion 14
The fork support rod 21 and the rod member 1 are tightened toward the intermediate portion 13 through the two pairs of split sleeve pieces 42 that are components of the intermediate portion 13.
The rod portion 1A of can be tightened and fixed.

The fastening screw part 14 is provided with a square head 15 on its end face, which head 15 is adapted to receive any suitable tightening tool. The shape of this head may be arbitrary. With this configuration, as shown in FIG. 5, the fixing screw portion 14 of the clamp 4 can be firmly tightened with the tool 16. In addition, the fixing screw part 14 may be provided with serrations on the side surface so that it can be tightened by hand. Conventionally, only this manual tightening means was provided.

The bite fork device 10 consists of a bite fork 20 held in the patient's mouth and a fork branch 21 connected to the bite fork 20, which is connected to the clamp 4.
supported by Patient is Baitfork 20
Fig. 4A shows the state in which it is held in its mouth. The bite fork 20 is burned on the outside of the occlusal ridge as shown in FIG. 4B, but according to the present invention, the bite fork 20 is burned on one side near the fork branch 21 as best seen in FIGS. A stopper 22 is provided to support the paraffin wax and prevent it from deforming.

In such a face bow, an extraoral writing set 30 is used, as shown in FIG. This set includes a gossic arch extraoral drawing board 31 and a supporting rod 32. This support rod 32 can also be supported by being attached to the clamp 4 as shown in FIGS. 4A and 5. The member 34 supporting the drawing pin 33 together with the extraoral drawing board 31 is also held in the patient's mouth. Its purpose is well known to those skilled in the art and will not be described in detail here. According to the present invention, a pair of tubes 35 are attached to the lower side of the extraoral drawing board 31 in parallel, and a pair of bar members 36 are attached to the support rod 32 in parallel at the same interval. By inserting these bar members 36 into the corresponding tubes 35, the extraoral drawing board 31
is connected to the support rod 32. Therefore, the extraoral drawing board 31 is securely attached to the support rod 32, and no relative displacement occurs during the measurement operation.

In the above description, the usage of the condylar rod, bite fork, and Gossick arch extraoral marking board has been briefly described, but it will be obvious to those skilled in the art that there are other usages and measurement methods.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a face bow related to the present invention. FIG. 2 is a plan view of the bite fork device used in the face bow of FIG. 1. FIG. 3 is a side view of the bite fork shown in FIG. 2. Fourth
Figure A shows a patient holding the bite fork in his/her mouth. FIG. 4B is a diagram illustrating how the bite fork is used. FIG. 5 is a diagram illustrating the tightening operation of the clamp of the face bow. FIG. 6 is an exploded perspective view showing an extraoral writing set that can be used with the face bow of FIG. FIG. 7 is a longitudinal sectional view of one clamp. DESCRIPTION OF SYMBOLS 1... Rod member, 2... Arch part, 3... Temporophthalmological rod fixing means, 4... Clamp, 10... Bite fork device, 14... Fixing screw part, 15... Tool engaging head, 20 ...Bite fork, 21...Shibashi, 2
2...stopper, 31...Gothic arch extraoral writing board, 32...branch, 35...tube, 36...
... Bar member, 40 ... Mounting hole, 42 ... Split sleeve piece, 43 ... Semicircular groove, 44 ... Screw hole, 4
5...Screw shaft.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An arch consisting of a rod member formed into a substantially U-shape, a condylar rod fixing means provided at the end of the leg of the U-shaped rod member, and a U-shaped horizontal rod. A measuring instrument including a clamping means attached to a corresponding rod portion and a measuring instrument attached to the clamping means,
the clamping means includes two clamps;
Each clamp has a bottom part, an intermediate part formed with a mounting hole that fits into the bar member of the bow part, and a support hole provided laterally to the mounting hole, and is screwed and tightened to the bottom part through this intermediate part. The fixing screw part has a head for engaging a tool on the end surface thereof, and the side surface of the fixing screw part is notched, so that the fixing screw can be connected with a tool or manually. A measuring instrument characterized in that it can be rotated. (2) Scope of Utility Model Registration The measuring instrument according to claim 1, wherein the measuring instrument includes a bite fork held in the patient's mouth and a fork branch connected to the bite fork, and the bite fork and the fork branch are connected to each other. A measuring instrument characterized in that a stopper is provided on one side of the bite fork near the connecting part. (3) In the measuring instrument according to claim 1 of the utility model registration claim, the measuring instrument includes a gossock arch extraoral drawing board held in the patient's mouth and an extraoral drawing board support rod connected to the gothic arch extraoral drawing board, and this connection is made on one side. 1. A measuring instrument characterized by a pair of tube members attached parallel to the elements and a bar member fixed to the other element so as to be inserted into the tubes.