JP3032821B1 - Floor dilators in removable floor straighteners - Google Patents

Abstract

An object of the present invention is to solve the inconvenience of a floor expander in a removable floor straightening device. SOLUTION: At least one pair of piston rods 28, 28 integrated via a connecting arm 27 to at least a pair of cylinders 26, 26 integrated via a connecting arm 25, is used as an internal spring for expressing elasticity. 29
Through the cylinder 2
6. Each end of the piston rod 28 is buried in a resin to provide a resilient expansion device having elasticity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor expander in a so-called removable floor straightening device.

[0002]

2. Description of the Related Art A removable bed orthosis is a type of plastic called a plate-shaped resin which can remove (removably attach) teeth, dentitions, and jawbones instead of wires, instead of wires. ) Or determine the point of action (the mounting base for the reduction mechanism or the expansion mechanism). It is extremely easy to handle because a resin that can be easily installed in the mouth is used as a mounting base for the correction mechanism. This is not only a fear of tooth extraction, but also a variety of inconveniences (lost exercise control, disruption of occlusal balance, triggers and causes of temporomandibular disorders). It is also used for jawbone expansion devices.

[0003] More specifically, in the case of inter-dentition expansion, as shown in FIG. 6, two-part resin floors 1 and 1 ′ formed along the inner surface of the mouth are provided with molar teeth 3 a on both left and right sides of the dentition 2. , 3
b, clasp 5 as a maintenance device attached to 4a, 4b
a, 5b, 6a, and 6b, and a dilator 7 is installed between the resin floors 1 and 1 '.
a, 5b, 6a, 6b are attached and detached by attachment / detachment, and the expansion bias A in the tooth separation direction by the dilator 7 expands the interval between the two rows of teeth to enable correction without tooth extraction.

[0004] In the inter-molar expansion, as shown in FIG. 7, a resin floor 8 formed along the inner surface of the mouth is provided with
At 9 molars to be subjected to non-tooth extraction correction, the dividing portion 8a is cut and divided, and the clasps 10a attached to the front and rear teeth 9a, 9b of the floor 8 and the dividing portion 8a are respectively attached to the floor 8 and the dividing portion 8a.
10b, and clasps 11a and 11b as maintenance devices are also attached to the opposite side of the floor 8 of the main body, and the dilator 7 is bridged over the divided part of the molar 9 to form the retainer 9b. The movement in the chin back direction B is enabled.

As is apparent from the above description, since the resin floor 1, 1 'must be expanded and biased in the predetermined directions A and B by the expander 7, the expander 7 is moved through the action point. The resin 1, 1 'must be capable of giving an expansion bias in a predetermined direction A, B or the like. Such a dilator 7 is disclosed in, for example, Japanese Patent Publication No. Sho 62-5622, and includes two pressure transmitting nuts 12 and 13 as shown in FIGS. 14, a large-diameter operating portion 15 is provided at the center of the screw 14, and the nuts 12 and 13 are located on both sides of the operating portion 15. The left and right halves of the extending screw 14 are screwed in reverse. A pair of guide rods 16 and 16 are arranged in parallel with the screw 14 with the screw 14 interposed therebetween.
A collar-shaped stopper 17 is integrally provided at each end of the nuts 6 and 16.
When moving along, the screw 14 does not come off.

The nuts 12 and 13 are provided with a concave portion 18 which is open on the outer surface, and a stopper 17 is engaged with a shoulder of the concave portion 18. It is configured to protrude further outward in the axial direction by the depth. Plastic linings 19 are provided on the inner surface of the recess 18 and serve to prevent rattling, and in particular act as a frictional resistor against movement of the guide rod 16 in the recess 18 of the stopper 17. Thereby, rattling of the nuts 12 and 13 is eliminated. The nuts 12 and 13 have the resin 1 already described,
1 'is integrally attached. The left and right guide rods 16, 16 complement the imbalance at both ends of the nuts 12, 13 due to the transmission of the expanding urging force of the screw 14 to one central point of the nuts 12, 13.

[0007] In the device disclosed in Japanese Patent Application Laid-Open No. Sho 60-114249, as shown in FIG. 10, an expander 7 'is provided with an expansion screw 20 serving as a substantially turnbuckle and two guide post cylinders 21a. 21b, which are made of stainless steel chrome-nickel alloy and non-ferrous metal, so they are resistant to the acid in the mouth and the guide post cylinders 21a, 21b try to displace the two parts joined together The guide post cylinders 21a and 21b are provided with a resistance to force, and the guide post cylinders 21a and 21b are composed of a cylinder 22 and a piston 23 that can move coaxially with the cylinder 22, and the guide post cylinders 21a and 21b are held in alignment with each other by an alignment wire 24. Have been. As in the previous case, the left and right post cylinders 21a and 21b and the piston 23 complement the imbalance of the configuration of the extension screw 20 at the central point.

[0008]

First, the above-mentioned conventional dilators 7 and 7 'are extremely cumbersome in use.
This will be described below with reference to FIGS. That is,
A large-diameter operating portion 15 is provided at the center of the screw 14, and the adjustment of the interval S made by a pin bar or the like is freely adjustable. Usually, this adjustment is set before the mouth is attached. Is, of course, constrained within the limits of wearing,
Since it depends on the reaction force accumulated by forcible wearing, adjustment must be made according to the therapeutic effect (expansion). For example, the screw 14 is basically rotated by 1/4 turn 90
In the case of using the degree as a rule and opening it by 0.2 mm in 1/4 turn, the maximum limit is twice a week.

[0009] As described above, the mechanism of the development of the expansion force is a fixed interval, so that the expansion ability, that is, the therapeutic effect is limited, and repeated adjustment and management are required. Because of this lack of flexibility, if the patient discontinues use, the expansion may regress and the device may be difficult to enter or may not enter at all,
If rotation is forgotten, or if the screw is not mounted for a long time, the screw becomes incompatible and even if the screw is not rotated in the reverse direction, the screw cannot be mounted again.

[0010] Next, the mechanism in which the minute projections called screw threads of the screw 14 are exposed in the mouth must give an unpleasant feeling to the tongue. Furthermore, the point-like expansion force expressing force of the screw 14 (FIGS. 8 and 9) and the expansion screw 20 (FIG. 10) is evenly applied to the width-length pressure transmitting nuts 12 and 13 (FIGS. 8 and 9) (operation points). Guide rods 16 (FIGS. 8 and 9), post cylinders 21a and 21b, piston 2
The mechanism supplemented with a guide such as 3 (FIG. 10) has an irrationality that is inevitably complicated and inevitably large despite being limited in size, and makes it difficult to design and manufacture.

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances described above, and has as its object to prevent any re-attachment even if reversion occurs due to non-use, and to be extended in use. There is no need to adjust the force at all, and the expansion expression mechanism itself can also be provided with a uniform transmission guide function to increase the size,
It is an object of the present invention to provide a floor dilator in a removable floor straightening device which can avoid complication.

[0012]

In order to achieve the above object, a floor dilator of the present invention has at least a pair of cylinders integrated via a connecting arm and at least a pair of cylinders integrated via a connecting arm. A pair of piston rods are assembled together with a stopper to prevent them from falling off via an internal spring for expressing elasticity, and the respective ends of the cylinder and the piston rod are embedded in a resin.

A piston rod molded in the same cross-sectional shape is assembled to a cylinder molded in a flat cross section through an internal spring for producing a resilient force formed in a flat cross section with preventing the cylinder from falling off. Are to be buried in resin. A piston rod molded to the same cross-sectional shape is assembled to a cylinder molded to a flat cross-section with a plurality of internal springs to prevent falling off via internal springs for expressing resilience, and the respective ends of the cylinder and piston rod are resin-coated. It is to be buried in.

[0014]

[Function] Since the expansion force is expressed by a spring, the expansion force (elasticity) is maintained over a large stroke range with forward and backward movements, making it flexible. Since it becomes unnecessary at all, and the reversing allowance at the time of attachment and detachment is secured, the attachment and detachment operation becomes easy, and inconvenient situations such as impossible re-attachment and re-adjustment in the screw system are eliminated.

[0015] This expansion force generating mechanism that does not require adjustment can easily form a horizontally long action point by arranging cylinders in parallel.
In addition, since the whole can be designed to be flat, a single, horizontally long action point can be formed. That is, since it is easy to match the expansion force manifestation point with the action point on the resin, no assistance of a guide is required for uniform transmission, so simplification and miniaturization can be expected.

Further, the contact feeling of the tongue is preferable because of the overall cylindrical shape.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2, the connecting arm 2
A pair of cylinders 26, 26 integrated through 5, 25
A pair of piston rods 28, 28 also integrated via connecting arms 27, 27
Assembled via 9, 29.

The piston rods 28, 28 are prevented from falling off by the engagement of the piston portions 28a, 28a with stoppers 30, 30 provided in the cylinders 26, 26. Thus, the cylinders 26, 26 and the piston rods 28, 28 are elastically resilient and extendable,
When each is buried in the resin facing each other, it can be a dilator. Since the extended biasing force is maintained for a large span, no adjustment is required on the way. It can also be mounted without being used and set back, and can be detached during operation. The construction of cylinders 26, 26 of the same standard, piston rods 28, 28 and internal springs 29, 29 makes it possible to transmit the expansion force evenly at the point of lateral application without any assistance.

3 to 5 show another embodiment. A piston rod 28 'of the same shape is assembled to a single cylinder 26' having a flat cross section via an internal spring 29 '. FIG. 4 shows a case where the spring 29 ′ has a double configuration (FIG.
FIG. 5 shows a case of a single configuration. The piston rod 28 'is prevented from falling off by engaging the piston portion 28'a with a stopper 30' provided inside the cylinder 26 ', as in the case described above.

The extended functions and the like are the same as those shown in FIGS. 1 and 2, except that the point of application of the uniform transmission can be formed independently.

[0021]

The present invention is configured as described above.
The following effects are obtained. (1) Easy to attach and detach and continue expansion without the need for adjustment, which is revolutionary. (2) Since the point of action of the extended biasing force can be formed horizontally without requiring assistance, simplification and miniaturization can be expected. (3) Tongue contact sensation is favorable.

[Brief description of the drawings]

FIG. 1 is an overhead view of an expander of the present invention.

FIG. 2 is a plan sectional view of the dilator of the present invention.

FIG. 3 is an overhead view of the expander of the present invention.

FIG. 4 is a plan sectional view of the dilator of the present invention.

FIG. 5 is a plan sectional view of the dilator of the present invention.

FIG. 6 is an explanatory diagram of a removable floor straightening device.

FIG. 7 is an explanatory diagram of a removable floor straightening device.

FIG. 8 is an explanatory diagram of a conventional expander at the time of contraction.

FIG. 9 is an explanatory view of a conventional dilator at the time of extension.

FIG. 10 is an explanatory diagram of a conventional dilator.

[Explanation of symbols]

 1, 1 'Resin floor 2 Teeth 3a, 3b Molars 4a, 4b Molars 5a, 5b Clasps 6a, 6b Clasps 7, 7' Extender 8 Resin floor 8a Dividing part 9 Molars 9a Front teeth 9b Rear teeth 10a, 10b Clasps 11a, 11b Clasp 12 Pressure transmitting nut 13 Pressure transmitting nut 14 Operating screw 15 Operating portion 16 Guide rod 17 Stopper 18 Recess 19 Plastic lining 20 Expansion screw 21a, 21b Guide post cylinder 22 Cylinder 23 Piston 24 Alignment wire 25 Connecting arm 26, 26 'Cylinder 27 Connecting arm 28,28' Piston rod 28a Piston part 29,29 'Inner spring 30,30' Stopper 31 Partition groove

Claims (3)

(57) [Claims] An at least one pair of piston rods which are also integrated via a connecting arm with at least a pair of cylinders integrated via a connecting arm are prevented from falling off via an internal spring for expressing elasticity. A floor expander in a removable floor straightening device, wherein each end of the cylinder and the piston rod is embedded in a resin. 2. A cylinder having a flat cross-section and a piston rod having the same cross-sectional shape assembled with a flat cross-section through an internal spring for forming a resilient force while preventing the cylinder from falling off. A floor expander in a removable floor straightening device, wherein each end of a piston rod is embedded in a resin. 3. A cylinder having a flat cross section and a piston rod having the same cross-sectional shape are assembled with a plurality of internal springs for expressing resilience while preventing the cylinder from falling off. A floor expander for a removable floor straightening device, characterized in that the end of the floor is buried in a resin.