JP3682586B2 - Floor expander in removable floor straightener - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a floor expander in a so-called removable floor straightening device.
[0002]
[Prior art]
Removable floor orthodontic device is a type of plastic called a plate-like resin that can be removed (removable) instead of using a wire to correct teeth, dentitions, and jawbones. The action point (reduction mechanism or mounting base of the expansion mechanism) is obtained. It is extremely easy to handle because the resin that is easy to install in the mouth is used as the mounting base of the correction mechanism. This is not only a mere fear of tooth extraction, but also teeth, dentitions, and dentitions that can be corrected without tooth extraction to avoid various inconveniences (insufficient motor control, disruption of occlusal balance, triggers and causes of temporomandibular disorders) It is also used for jawbone expansion devices.
[0003]
That is, in interdental expansion, as shown in FIG. 13, the two-part resin floors 1, 1 ′ formed along the inner surface of the mouth are provided with molar teeth 3 a, 3 b, Clasps 5a, 5b, 6a and 6b as maintenance devices attached to 4a and 4b are attached, and an expander 7 is installed between the resin floors 1 and 1 'so that clasps 5a, 5b, 6a, The interval between the dentitions 2 is expanded by attaching and detaching 6b by attaching and detaching, and the extension urging force A in the direction away from the dentition by the expander 7 to enable correction without tooth extraction.
[0004]
Further, in intermaxillary extension, as shown in FIG. 14, the resin floor 8 formed so as to be along the inner surface of the mouth is cut and divided at the part 9 of the molars to be subjected to non-extraction correction, Clasps 10a and 10b attached to the front and rear teeth 9a and 9b of the molar teeth 9 are attached to the floor 8 and the divided portion 8a, respectively, and further, clasps 11a as a maintenance device are provided on the opposite side of the floor 8 of the main body. 11b, and the dilator 7 is laid over the divided portion of the molar portion 9 so that the molar tooth 9b can be moved in the deeper direction B of the jaw.
[0005]
As is clear from the above description, since the resin floors 1, 1 ', 8, and 8a must be expanded and biased in the predetermined directions A and B by the expander 7, the expander 7 passes through the action point. Thus, the resin 1, 1 ', 8, 8a must be capable of giving an expansion bias in a predetermined direction A, B or the like.
[0006]
As such an expander 7, for example, as disclosed in Japanese Patent Publication No. 62-5622, as shown in FIGS. 15 and 16, two pressure transmission nuts 12 and 13 are provided. The screw 14 is screwed into the operating screw 14 whose threading method is reversed, and a large-diameter operating portion 15 is provided at the center of the screw 14, and a pair of guide rods 16, 16 are sandwiched between the screws 14. The screw 14 is arranged in parallel.
[0007]
Further, the dilator described in Japanese Patent Application Laid-Open No. 2000-139554 filed by the applicant of the present application is connected to at least a pair of cylinders 26 and 26 integrated via a connection arm 25 as shown in FIGS. 27. At least a pair of piston rods 28, 28 integrated with each other through 27 is assembled together with an internal spring 29 for exerting elastic force to prevent them from falling off, and the end portions of the cylinder 26 and piston rod 28 are connected to each other. It is used by being embedded in the resin.
[0008]
[Problems to be solved by the invention]
The conventional dilator 7 described in Japanese Patent Publication No. 62-5622 (hereinafter referred to as a conventional screw type dilator) is extremely troublesome to use. explain. That is, a large-diameter actuating portion 15 is provided at the center of the screw 14 and the adjustment of the interval S made by a pin rod or the like is free. Usually, this adjustment is set before mounting in the mouth. Naturally, the set amount is limited within the limit of wearability and depends on the reaction force accumulated by forceful wear, so adjustment must be made according to the therapeutic effect (expansion). For example, when the screw 14 is basically used at 90 ° of 1/4 rotation and opened by 0.2 mm at 1/4 rotation, the maximum is twice a week.
[0009]
Thus, due to the mechanism in which the source of expansion force is generated at a fixed interval, expansion ability, that is, therapeutic effect is limited, and repeated adjustment management is forced. Because of this lack of flexibility, if the patient stops using the device, the device will not be able to enter the device because it will not be able to enter the device due to the reversal of enlargement. If it is long, it will be incompatible, and it will even be impossible to mount it again unless the screw is reversely rotated.
[0010]
Further, a mechanism supplemented by providing guides such as guide rods 16 on both sides in order to uniformly spread and transmit the point-like expansion force such as the screw 14 to the wide pressure transmission nuts 12 and 13 (operation point). Has the unreasonableness that must be complicated and large regardless of size restrictions, and has difficulty in designing and manufacturing.
[0011]
In addition, the dilator described in Japanese Patent Laid-Open No. 2000-139554 (hereinafter referred to as a conventional spring type dilator) eliminates the problems of the conventional screw type dilator by combining a cylinder with a spring and a piston rod. The following effects are obtained.
(1) It is epoch-making because it allows easy attachment and detachment and expansion without adjustment.
(2) Since the application point of the extended urging force can be formed horizontally without requiring assistance, simplification and miniaturization can be expected.
[0012]
However, the conventional spring-type dilator described above has a large extension stroke of the spring and there is no limit. Therefore, even if the teeth move, the continuous pushing force always works, so the patient neglects to see the doctor. The teeth may move more than necessary, and because the spring is housed between the cylinder and piston rod, the overall length is more than twice the length of the spring. There is a problem that there is a limit to downsizing.
[0013]
The present invention was devised to solve the above-mentioned problems, and it is possible to easily adjust and determine the upper limit of the expansion distance while maintaining the features and effects of the conventional spring type expander. In addition, it is a technical challenge to make a configuration that can be further miniaturized, and as a result, it is possible to expand the floor in a removable floor straightening device that can be adjusted easily and reliably with higher safety, less labor for adjustment. The purpose is to provide a vessel.
[0014]
[Means for Solving the Problems]
The means according to claim 1 of the present invention for solving the above-described problems is that the block is formed from the opposing end surfaces of a pair of left and right block bodies connected to each other in a left-right direction with a connecting rod. At least a pair of pipe bodies are inserted and slid into a cylinder hole formed in at least one pair in each body so that the left and right end portions of a coiled spring body for expressing elastic force are protruded inside and slidably stored. A stopper mechanism is provided between the connecting rod and the block body so that the upper limit of the extension distance between the pair of block bodies can be adjusted by freely assembling and the elastic force of the spring along the connecting rod. ,
That a part of the pair of block bodies is embedded and fixed in the resin,
It is in.
[0015]
According to the above-described configuration, the pair of left and right block bodies move away from each other by the elastic force of the spring, that is, receive a force in the expanding direction, so that the portion embedded in the resin of the block body acts as a direct action point. , Give power for correction.
[0016]
Since the expansion force is expressed as a spring, it is possible to maintain the expansion force (elastic force) within a large stroke range with advance and retreat allowances as in the case of conventional spring-type dilators. This eliminates the need for adjustment during re-installation and secures a back-up allowance during attachment / detachment, making attachment / detachment operations easy, and inconveniences such as the inability to re-install the screw system and the need for re-adjustment. Is resolved.
[0017]
In addition, since the stopper mechanism is provided between the connecting rod and the block body so as to adjust the upper limit of the extension distance between the pair of block bodies by the elastic force of the spring along the one connecting rod. There is no worry that expansion will go too far due to the stopper mechanism.
[0018]
Furthermore, since the upper limit of the extension distance can be adjusted, the effect of the conventional spring type dilator that the extension stroke is large can be exhibited gradually or systematically by expanding the upper limit stepwise. However, a sufficient therapeutic effect can be exhibited without replacing the dilator.
[0019]
Further, in this configuration, since there is no portion corresponding to the piston of the conventional spring type expander, the outer length can be shortened with respect to the same spring length, and further miniaturization is possible.
[0020]
In addition, since the block body is given elastic force by at least a pair of springs instead of one, the force acts in a certain direction without being shaken, so that the teeth can be moved with high accuracy in a predetermined direction. .
[0021]
Further, if the cylinder holes are arranged side by side in the block body, a horizontally long action point can be easily formed, and the whole can be designed flat, and a single horizontally long action point can be formed. That is, since it is easy to match the expansion force expression point and the action point in the resin, it is not necessary to assist the guide for uniform transmission, so simplification and miniaturization can be expected.
[0022]
Further, since the spring is housed in the pipe body and the pipe body is slidably inserted into the cylinder hole of the block body, at least a pair of pipes in the left and right direction of the pair of block pairs are connected together with the connecting rod. The effect as a movement guide is exhibited, and the movement of the block body can be achieved stably. Here, in order to more smoothly achieve the movement of the block body, it is preferable that the connecting rod is inserted from the center of the end face of the block body, and the pipe body is disposed at a symmetrical position from the outside.
[0023]
The invention according to claim 2 is the invention according to claim 1,
Forming a predetermined number of pin holes into the left and right rows at predetermined intervals, from which the stopper pins are detachably inserted from the upper part of the side peripheral surface of the cylindrical connecting rod,
A shaft hole through which the connecting rod is slidably inserted is formed from the opposite end surfaces of the pair of block bodies, and a long hole having an elliptical cross section is formed to open a part of the shaft hole upward from the upper surface. To do,
Assembling the connecting rod into the shaft hole of the block body, and configuring a stopper mechanism by locking the stopper pin inserted into the predetermined pin hole through the long hole and the long hole, connecting the pair of block bodies,
It is in.
[0024]
The above-described configuration according to claim 2 relates to a stopper mechanism, and a stopper pin is inserted into a pin hole provided at a predetermined interval in the connecting rod, and by locking the stopper pin and the long hole formed in the block body, The upper limit of the extension distance between the pair of block bodies due to the elastic force of the spring can be determined. Here, since the long hole is formed in the block body, the upper limit of expansion is determined by the above locking, but conversely, the sliding operation in the contraction direction of the distance between the block bodies is not affected by this stopper pin. .
[0025]
In addition, by providing a predetermined number of pin holes in a single line on the left and right sides at a predetermined interval, the upper limit position of the expansion width can be set sequentially and accurately according to the insertion position of the stopper pin.
[0026]
In particular, it is possible to adopt a method in which a plurality of stopper pins are inserted in advance and the upper limit is gradually expanded while sequentially removing from the inner stopper pin. According to this method, the stopper pin and pin hole are aligned. The patient can easily achieve the upper limit setting adjustment operation.
[0027]
The invention according to claim 3 is the invention according to claim 1,
The connecting rod is an operating screw provided with an operating part in the center and screwed in the opposite direction on the left and right.
A long hole having an oval cross-sectional shape is formed from the upper surface of the pair of block bodies, and a shaft hole that penetrates from the opposite end surface to the side surface of the long hole and through which the connecting rod is slidably inserted is formed. ,
By assembling the connecting rod in this shaft hole, and by locking the nut and the long hole screwed to the left and right ends of the connecting rod, a stopper mechanism is configured, and a pair of block bodies are connected,
It is in.
[0028]
The above-described configuration according to claim 3 also relates to a stopper mechanism, in which an operating portion located at the center of the connecting rod rotates the connecting rod around its axis, and an operating screw whose screwing is reversed on the left and right. The position of the nut can be adjusted by the function, and the upper limit of the extension distance between the pair of block bodies due to the elastic force of the spring can be determined by locking the nut and the long hole formed in the block body. It is what I did. Here, as in the configuration of the second aspect, by forming a long hole in the block body, the upper limit of expansion is determined by the above-mentioned locking, but on the contrary, the sliding operation in the contraction direction is influenced by this stopper mechanism. I do not receive it.
[0029]
Moreover, according to this structure, it becomes possible to adjust the expansion distance between block bodies continuously with an operating screw.
[0030]
According to a fourth aspect of the present invention, in the first, second, or third aspect of the invention, a center hole that penetrates the body portion of the pipe body from the upper surface in the longitudinal direction of the side peripheral surface of the pipe body is formed. The center pin is inserted into the center hole in a state where the spring is housed symmetrically.
[0031]
According to the above configuration of the fourth aspect, the center pin can hold the position of the spring in the pipe body substantially symmetrically, so that the spring is unevenly distributed in the pipe body or, in extreme cases, only one side of the pipe body. Thus, it is possible to prevent the spring from protruding, to ensure smooth sliding in the cylinder hole of the pipe body, and to sufficiently exert the spring resilience of the spring.
[0032]
According to a fifth aspect of the present invention, in the first, second, third or fourth aspect of the invention, the spring shaft pin is slid from the both ends of the spring to the inside with the outer flange peripheral piece provided at the end as the insertion limit. The configuration is to be freely inserted.
[0033]
According to the above configuration of the present invention, the spring shaft pin can hold the spring posture straight and prevent unauthorized deformation of the spring in the vicinity of the pipe body end face, so that the spring protruding from the end face of the pipe body in particular. When the portion moves into the pipe body, it is possible to prevent the spring from catching on the end face of the pipe body, and thus to ensure smooth expansion and contraction and movement of the spring.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 1 to 10 show a first embodiment of the dilator of the present invention. The dilator of the present invention mainly includes a pair of left and right block bodies 31, a connecting rod 41 for connecting the block bodies 31, and a spring 55. It is composed of a pair of accommodated pipe bodies 51.
[0035]
As shown in FIGS. 2 to 5, the outer shape of the block body 31 is a flat rectangular parallelepiped, and a pair of cylinder holes 32 through which the pipe body 51 is slidably inserted from the end face 33, and a connecting rod is interposed therebetween. A shaft hole 34 that is slidably inserted is formed, and an oval long hole 35 is formed in a state where the shaft hole 34 is opened upward from the upper surface. In addition, notches 36 are formed on the upper and lower ridge lines of the front and rear surfaces to ensure the fixation to the resin.
[0036]
The connecting rod 41 has a round bar shape and is formed by penetrating three pin holes 42 in total at intervals of 2 mm on the left and right sides, and a thread is engraved on a part of the inner peripheral surface of the pin hole 42. The stopper pin 43 is screwed. (See Figs. 8 and 9)
[0037]
FIG. 6 shows a state in which the spring shaft pin 56 for preventing unauthorized deformation of the end portion of the spring 55 is fitted in the spring 55 with the outer flange piece 57 as a fitting limit, and FIG. FIG. 5 is a plan sectional view of the purp body 51, and a center hole 52 into which a center pin 53 for holding the spring 55 in a substantially bilaterally symmetrical position within the pipe body 51 is formed.
[0038]
1, 8, and 9 are an overall perspective view and a plan view, respectively, showing a state in which the block body 31, the connecting rod 41, and the pipe body 51 are assembled. FIG. 5 is a side sectional view showing that the spring 55 is accommodated with the left and right ends protruding, and the pair of two pipe bodies 51 into which the center pin 53 is inserted from the center center hole 52 are respectively formed of the pair of block bodies 31. A force is applied to the cylinder hole 32 so as to extend the distance between the pair of block bodies 31 by the elastic force of the spring 55.
[0039]
The connecting rod 41 is inserted into the shaft holes 34 of the pair of block bodies 31, stopper pins 43 are inserted from the long holes 35 of the block bodies 31, and are screwed into the pin holes 42. The stopper pin 43 is inserted into the outer two of the two pin holes 42.) The stopper pin 43 and the long hole 35 are engaged to form a stopper mechanism, and a pair of block bodies formed by springs 55. The upper limit of the extension distance of 31 is determined, so that excessive extension is surely prevented.
[0040]
FIG. 10 is an explanatory view showing an example of an adjustment method of the extension distance at the time of use. When assembling, the stopper pin 43 is inserted into all of the six pin holes 42 in the left and right three pieces arranged in advance at intervals of 2 mm. (Refer to FIG. 10 (a), the distance between the end surfaces 33 of the pair of block bodies 31 is 1 mm) Thus, the upper limit of the extension distance can be gradually increased systematically to 2, 4, 6 mm (see FIGS. 10B, 10C, and 10D). (In (b) and (c), the spring 55 and the spring shaft pin 56 are omitted.)
[0041]
In addition, such adjustment of the upper limit of the extension distance does not require a delicate operation of alignment of the hole and the pin, and can be carried out by unscrewing the stopper pin 43 so that the patient himself can easily And it is possible to implement reliably. Further, since the stopper pin 43 is locked with the long hole 35, the distance between the pair of block bodies can be easily moved in the reduction direction when the dilator is attached or detached.
[0042]
FIG. 11 shows another example for making the position of the spring 55 in the pipe body 51 substantially bilaterally symmetric. A partition plate 54 is installed at the center in the length direction in the pipe body 51. The spring 55 is housed on the left and right sides of the pipe body 51.
[0043]
FIG. 12 is a plan sectional view showing a second embodiment of the dilator of the present invention. The configuration of the spring 55, the shape of the pipe body 51, and the assembly of the pipe body 41 to the block body 31 are the same as in the first embodiment. However, the operating rods 45 are provided in the left and right central portions of the connecting rod 41, and the operating screws 44 are reversed in the left and right directions, and the left and right end portions of the operating screws 44 are respectively formed in the shape of the long holes 35. The cylindrical nut 46 which fits is screwed together, and the stopper mechanism is configured by locking the nut 46 and the long hole 35.
[0044]
In the second embodiment, the upper limit of the expansion distance between the block bodies can be continuously adjusted by rotating the operating screw 44 by the operating portion 45 and moving the position of the nut 46.
[0045]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be obtained.
In the invention of claim 1, there is a concern that the expansion is excessive due to the stopper mechanism while maintaining the feature that the conventional spring-type dilator can be easily attached and detached and the expansion can be continued without the need for adjustment. In addition, by gradually adjusting the upper limit of the extension distance, the effect of the spring-type dilator with a large extension stroke can be demonstrated gradually or systematically, and a sufficient therapeutic effect can be achieved without replacement. Therefore, the present invention provides a dilator that is highly safe, requires little effort for adjustment, can be adjusted easily and reliably, and has a high therapeutic effect.
[0046]
Further, since there is no piston portion in the conventional spring type expander, the outer length can be shortened with respect to the same spring length, and further miniaturization can be achieved.
[0047]
In the invention of claim 2, the upper limit of the extension distance can be set sequentially and accurately depending on the insertion position of the stopper pin, and in particular, the upper limit is gradually expanded while sequentially removing the stopper pin. A method can be employed, and according to this method, the patient himself can easily and reliably perform the operation of setting the upper limit.
[0048]
In the invention of claim 3, the upper limit of the expansion distance between the block bodies can be continuously adjusted by the operating screw.
[0049]
In the invention of claim 4, since the position of the spring in the pipe body can be held substantially symmetrically by the center pin, smooth sliding in the cylinder hole of the pipe body is ensured, and the spring is elastic. The power can be fully exerted.
[0050]
In the invention of claim 5, the spring posture can be held straight by the spring shaft pin, particularly at the end face of the pipe body when the portion of the spring protruding from the end face of the pipe body moves into the pipe body. It is possible to prevent the spring from being caught and to ensure smooth expansion and contraction and movement of the spring.
[Brief description of the drawings]
FIG. 1 is an overall perspective view showing a first embodiment of a dilator of the present invention.
FIG. 2 is a plan view showing a block body of a first embodiment of the dilator of the present invention.
3 is a side sectional view taken along the line CC in FIG.
4 is a front cross-sectional view taken along line DD in FIG. 2. FIG.
FIG. 5 is a front sectional view taken along line EE in FIG. 2;
FIG. 6 is a plan view showing a spring and a shaft pin of the first embodiment of the dilator of the present invention.
FIG. 7 is a plan view showing a pipe body of a first embodiment of the dilator of the present invention.
FIG. 8 is a plan view showing a substantially half of the first embodiment of the dilator of the present invention cut away.
9 is a side sectional view taken along line FF in FIG. 8. FIG.
FIG. 10 is an explanatory diagram showing an example of a stepwise adjustment method of the expansion upper limit of the first embodiment of the expander of the present invention.
FIG. 11 is a plan view showing another example of a pipe body, a spring, and a shaft pin.
FIG. 12 is a plan sectional view showing a second embodiment of the dilator of the present invention.
FIG. 13 is an explanatory diagram of a removable floor straightening device.
FIG. 14 is an explanatory diagram of a removable floor straightening device.
FIG. 15 is an explanatory view showing a conventional screw type dilator when being contracted.
FIG. 16 is an explanatory view showing the extension of a conventional screw expander.
FIG. 17 is an overall perspective view showing a conventional spring-type dilator.
FIG. 18 is a plan sectional view showing a conventional spring-type dilator.
[Explanation of symbols]
Resin floor 2; Dental row 3a, 3b; Molar 4a, 4b; Molar 5a, 5b; Clasp 6a, 6b; Clasp 7; Dilator 8; Resin floor 8a; Dividing part 9; Molar 9a; Rear teeth 10a, 10b; Clasps 11a, 11b; Clasp 12; Pressure transmission nut 13; Pressure transmission nut 14; Actuating screw 15; Actuating part 16; Guide rod 25; Connecting arm 26; Cylinder 27; Inner spring 31; Block body 32; Cylinder hole 33; End face 34; Shaft hole 35; Long hole 36; Notch 41; Connecting rod 42; Pin hole 43; Stopper pin 44; 46; Nut 51; Pipe body 52; Center hole 53; Center pin 54; Partition plate 55 Spring 56; spring shaft pin 57; outer flange piece

Claims (5)

At least one pair is formed on each of the block bodies (31) from the opposing end faces (33) of the pair of left and right block bodies (31) connected so as to be movable relative to each other in the left-right direction with the connecting rod (41). At least a pair of pipe bodies (51) are inserted into the cylinder holes (32) so that the left and right ends of the coil spring bodies (55) for expressing elastic force are projected into the cylinder holes (32), and are slidably inserted. A stopper mechanism that allows the upper limit of the extension distance between the pair of block bodies (31) to be adjustable by the elastic force of the spring (55) along the connecting rod (41) is connected. Floor extension in a removable floor straightening device, characterized in that it is configured to be provided between the rod (41) and the block body (31), and a part of the pair of block bodies (31) is embedded and fixed in the resin, respectively. vessel. A predetermined number of pin holes (42) into which stopper pins (43) are detachably fitted from the upper part of the side peripheral surface of the cylindrical connecting rod (41) are formed in a single line at a predetermined interval, and a pair of block bodies (31 The shaft hole (34) through which the connecting rod (41) is slidably inserted, and a part of the shaft hole (34) from the upper surface are opened upward from opposite end surfaces (33) of A long hole (35) having an oval shape is formed, the connecting rod (41) is assembled to the shaft hole (34) of the block body (31), and the predetermined hole is inserted through the long hole (35). The removable type according to claim 1, wherein a stopper mechanism is configured by locking the stopper pin (43) inserted into the pin hole (42) and the long hole (35), and the pair of block bodies (31) are connected. Floor dilator in floor straightening equipment. The connecting rod (41) is an operating screw (44) provided with an operating part (45) in the center and the screwing direction is reversed on the left and right, and the cross-sectional shape is elliptical from the upper surface of the pair of block bodies (31) A shaft hole (34) through which the connecting rod (41) is slidably inserted from the opposite end surface (33) to the side surface of the long hole (35). The connecting rod (41) is assembled to the shaft hole (34), and the nut (46) screwed into the left and right ends of the connecting rod (41) is engaged with the elongated hole (35). The floor expander in the removable floor straightening device according to claim 1, comprising a stopper mechanism and connecting the pair of block bodies (31). In the state where the center hole (52) penetrating the trunk portion of the pipe body (51) is formed from the upper part of the longitudinal center portion of the side peripheral surface of the pipe body (51), the spring (55) is accommodated symmetrically, The floor expander in the removable floor straightening device according to claim 1, 2 or 3, wherein a center pin (53) is inserted into the center hole (52). From the both ends of the spring (55), with the outer flange peripheral piece (57) provided at the end as the insertion limit, the spring shaft pin (56) is configured to be slidably fitted, A floor dilator in the removable floor straightening device according to 3 or 4.

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