JP3667579B2 - Jaw perturbation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a jaw perturbation device that can be used for a device for examining movements such as vocalization and mastication accompanied by jaw movement, a jaw movement training apparatus, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, devices that give mechanical perturbation to the lower jaw have been used to examine human vocalization and mastication. This conventional device has a structure in which a bar is pulled out from the end of the lips to the front from a jig for fixing teeth and pulled with a wire, and a structure for forcibly restraining the upward movement of the bar extending downward from the bar. Is adopted.
[0003]
[Problems to be solved by the invention]
However, in devices with these structures, there is a limitation that only perturbations that impede jaw closing movement or promote jaw opening movement (downward) can be given, and the lever that is put on the front of the tooth Since the tooth is pulled downward, unnecessary torque is applied to the tooth fixing portion due to the rotational moment about the tooth, which causes pain to the subject.
[0004]
Further, pulling the wire provided on the jig teeth motor or the like, intended to move in the opening direction, the wire can outer susceptible, only the opening direction only has a problem such as not perturbed.
[0005]
The present invention eliminates the above problems, enables perturbation in the jaw closing direction (upward), and reduces the load on the subject by reducing the moment load and jaw restraint force applied to the tooth fixing jig. It is an object of the present invention to provide a jaw perturbation device.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides
[1] In the jaw perturbation device, by comprising a lower jaw jig for fixing the lower jaw, and the teeth fixture connected to the lower jaw jig, a jaw perturbation mechanism for giving the jaw perturbations from the outside to the lower jaw jig It is characterized by.
[0007]
[2] In the jaw perturbation device described in [1], the jaw perturbation mechanism connects the shaft to the lower jaw jig from two directions with a wire, and applies external force in both directions of opening and closing of the lower jaw during mandibular movement or at rest. It is characterized by that.
[0008]
[3] In the jaw perturbation device described in [1] above, the jaw perturbation mechanism may connect a shaft that gives jaw perturbation from the outside to the lower jaw jig by a bearing that can rotate in an arbitrary direction, and It is driven by the manipulator to move the range of space freely, characterized in that an external force is applied to the lower jaw closing both during mandibular movement, or in a stationary.
[0009]
[4] The jaw perturbation device according to [1], wherein a nut that is screwed between the lower jaw jig and the tooth fixing jig is provided so that the fixing force of the lower jaw jig can be adjusted. And
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
FIG. 1 is a front view showing a state in which the jaw perturbation device according to the first embodiment of the present invention is attached to a subject, FIG. 2 is a side view of the state in which the jaw perturbation device is attached to the subject, and FIG. It is a block diagram of this tooth fixing jig.
[0012]
In these drawings, reference numeral 1 denotes a tooth fixing jig for fixing a tooth, which is manufactured according to the dental mold of the subject. The tooth fixing jig 1 includes a tooth holding member 1A, a connecting plate 1B extending horizontally from the center of the tooth holding member 1A, and a connecting rod 1D formed with a male screw 1C fixed to the connecting plate 1B and extending downward. .
[0013]
Reference numeral 2 denotes a lower jaw jig for holding the lower jaw from below. The lower jaw contact plate 2A, the first connection plate 2B extending upward from the lower jaw contact plate 2A, and the first connection plate 2B are fixed in the horizontal direction. The second connecting plate 2 </ b> C extends and the L-shaped holding plate 2 </ b> D that holds the wire 5 and the shaft 4. The second connecting plate 2C is provided with a hole into which the connecting rod 1D of the tooth fixing jig 1 is fitted.
[0014]
As for the tooth fixing jig 1 , as shown in FIG. 3 (a), the tooth fixing jig 1 is a first tooth fixing jig having a rounded tooth gripping member 1A, or as shown in FIG. 3 (b). It can be set as a 2nd tooth | gear fixing jig of a shape. In either case, select a size that fits the subject's teeth.
[0015]
Therefore, the connecting rod 1D of the tooth fixing jig 1 is fitted into the hole of the second connecting plate 2C of the lower jaw jig 2, and further the tooth fixing treatment is performed by the nut 3 screwed into the male screw 1C of the connecting rod 1D. The tool 1 and the lower jaw jig 2 are firmly connected.
[0016]
Further, by adjusting the nut 3, the positions of the lower jaw and the lower jaw jig 2 are fixed in accordance with the height of the subject's jaw.
[0017]
Thus, the lower jaw fixing part is constituted by the tooth fixing jig 1, the lower jaw jig 2, and the nut 3.
[0018]
Next, the jaw perturbation mechanism 8 will be described. The lower jaw jig 2 is connected to the shaft 4 by a wire 5 and transmits the rotational force of the motor 7 via the link 6. The direction in which the wire 5 is stretched matches the motor rotation tangential direction as much as possible, and the shaft 4 and the wire 5 are fixed in a small area so that the force of the motor 7 can be transmitted without loss and the movement in the other direction can be made minute. Can prevent a large restraining force from being generated.
[0019]
Thus, as the jaw perturbation mechanism 8 to provide a jaw perturbations from the outside, the shaft 4, by connecting the lower jaw fixing unit by wire from two directions to counter matches the jaw closing direction such as wires 5, the lower jaw from the shaft 4 By adopting a structure in which the force applied to the lower jaw jig 2 for fixing the wire is mainly only in the tension direction of the wire 5 and a structure in which an external force is applied from the lower jaw part along the jaw rotating direction, Reduce external force and reduce the moment load on the teeth. Further, by using such a simple structure, the chin fixing part can be reduced in weight, and the burden on the jaw moving part can be reduced.
[0020]
FIG. 4 is a front view showing a state in which the jaw perturbation device according to the second embodiment of the present invention is attached to a subject, and FIG. 5 is a side view of the state in which the jaw perturbation device is attached to the subject.
[0021]
In this embodiment, the jaw perturbation mechanism is constituted by a two-degree-of-freedom manipulator, and the coupling between the tooth fixing jig 1, the lower jaw fixing part composed of the lower jaw jig 2 and the nut 3 and the shaft 4 by the wire 5 is as follows: This is the same as in the first embodiment.
[0022]
Therefore, the jaw perturbation mechanism 17 of the second embodiment will be described.
[0023]
The shaft 4 is connected to the link 11 via a translation bearing 10 that allows rotation and translation with the links 12, 13, and 14, and the link 11 is linked via the links 12, 13, and 14 by the rotation of the two motors 15 and 16. The configuration is such that it can move in a two-dimensional plane of the median plane. The wire mechanism and translational bearing mechanism eliminate minute movements other than the opening and closing directions of the lower jaw and head, and suppress the generation of excessive restraining force. Small movements in the longitudinal direction of the head are missed by the movement of the manipulator link. Perturbation applied to the jaw allows perturbation in the opening and closing direction of the lower jaw via the links 11 to 14 by controlling the torque of the motors 15 and 16.
[0024]
FIG. 6 is a front view showing a state in which the jaw perturbation device according to the third embodiment of the present invention is attached to a subject, and FIG. 7 is a side view of the state in which the jaw perturbation device is attached to the subject.
[0025]
In this embodiment, the lower jaw fixing portion including the tooth fixing jig 1, the lower jaw jig 2, and the nut 3 is the same as the above-described embodiment.
[0026]
In this embodiment, the jaw perturbation mechanism 22 couples the lower jaw fixing portion and the link 11 with a ball bearing 18 and allows arbitrary rotation at the position of the ball bearing 18. The minute movement of the head and jaws in the translational direction of the three-dimensional space can be performed by rotating the positions of the first motor 19, the second motor 20, and the motors 19 and 20. A third motor 21 is provided. The manipulator link driven by these three motors 19, 20 and 21 escapes using the fact that it can move to any position in a limited three-dimensional space, and the tip of the manipulator link is applied only in the opening and closing direction of the lower jaw. To control.
[0027]
As described above, according to the third embodiment, the jaw perturbation mechanism 22 is provided with a mechanism that allows arbitrary rotation in the lower jaw by the ball bearing 18 or the like, and is externally connected at the connection point between the lower jaw fixing portion and the link that provides external force. Tooth fixing jig 1 that occurs when external force is applied in the opening and closing direction of the lower jaw by adopting a mechanism in which a rotational moment force is not applied to the lower jaw and a structure in which an external force is applied to the jig holding the lower jaw from the lower jaw. Rotational moment load on can be reduced.
[0028]
Further, the jaw is fixed from above and below with a screw, and the fixed state can be adjusted with a nut, so that it can be fitted to the subject.
[0029]
In addition, this invention is not limited to the said Example, A various deformation | transformation is possible based on the meaning of this invention, and they are not excluded from the scope of the present invention.
[0030]
【The invention's effect】
As described above in detail, according to the present invention, the following effects can be obtained.
(A) Jaw perturbation in the closing direction (upward) of the lower jaw, which has not been realized with conventional devices, is possible, and the burden on the subject is reduced by reducing the moment load and lower jaw restraint force applied to the tooth fixing jig. can do.
(B) Combining a single-degree-of-freedom motor and a gimbal structure, missing head movement in the direction other than the jaw opening and closing direction, reducing head restraint, and further placing the force acting point under the chin, Jaw perturbation can be applied without difficulty during opening and closing operations.
(C) Furthermore, the jaw is fixed from above and below with a screw, and the fixed state can be adjusted with a nut, so that it can be fitted to the subject.
(D) The jaw perturbation device of the present invention is an effective means for clarifying the human vocalization mechanism, and is expected to be applied in the medical and rehabilitation fields for jaw diseases in the future. it can.
[Brief description of the drawings]
FIG. 1 is a front view showing a state in which a jaw perturbation apparatus according to a first embodiment of the present invention is attached to a subject.
FIG. 2 is a side view showing a state where the jaw perturbation apparatus according to the first embodiment of the present invention is attached to a subject.
FIG. 3 is a configuration diagram of a tooth fixing jig of the jaw perturbation device according to the first embodiment of the present invention.
FIG. 4 is a front view showing a state in which a jaw perturbation apparatus according to a second embodiment of the present invention is attached to a subject.
FIG. 5 is a side view showing a state where the jaw perturbation device according to the second embodiment of the present invention is attached to a subject.
FIG. 6 is a front view showing a state in which a jaw perturbation apparatus according to a third embodiment of the present invention is attached to a subject.
FIG. 7 is a side view showing a state where the jaw perturbation device according to the third embodiment of the present invention is attached to a subject.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tooth fixing jig 1A Tooth gripping member 1B Connecting plate 1C Male screw 1D Connecting rod 2 Lower jaw jig 2A Lower jaw contact plate 2B First connecting plate 2C Second connecting plate 2D L-shaped holding plate 3 Nut 4 Shaft 5 Wire 6 Link 7 Motor 8, 17, 22 Jaw perturbation device 10 Translation bearing allowing rotation and translation 11, 12, 13, 14 Link 15, 16 Two motors 18 Ball bearing 19 First motor 20 Second motor 21 Third motor motor

Claims (4)

(A) a lower jaw jig for fixing the lower jaw;
(B) a tooth fixing jig connected to the lower jaw jig;
(C) a jaw perturbation device characterized by comprising a jaw perturbation mechanism for giving the jaw perturbations from the outside to the lower jaw fixture. 2. The jaw perturbation device according to claim 1, wherein the jaw perturbation mechanism is configured to connect a shaft to the lower jaw jig from two directions by a wire, and to apply an external force in both directions of opening and closing of the lower jaw during mandibular movement or at rest. Jaw perturbation device. 2. The jaw perturbation device according to claim 1, wherein the jaw perturbation mechanism connects a shaft that gives jaw perturbation from the outside to the lower jaw jig by a bearing that can rotate in an arbitrary direction, and the external shaft is within a certain range in a three-dimensional space. was driven by manipulators move freely, jaw perturbation device characterized by applying an external force to the lower jaw closing both during mandibular movement, or in a stationary.   The jaw perturbation device according to claim 1, wherein a nut that is screwed between the lower jaw jig and a tooth fixing jig is provided, and the fixing force of the lower jaw jig is adjustable. apparatus.

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