JP2003038519A - Apparatus for pushing out tooth restoring material mixture and malaxation in capsule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for pushing out a tooth restoring material in mixture and malaxation of a powder component and a liquid component from a capsule particularly having an excellent capability of preventing a damage to the capsule or the apparatus itself for pushing out the tooth restoring material. SOLUTION: The apparatus for pushing out the tooth restoring material in mixture and malaxation from the capsule comprises grooves 2a of a predetermined pitch provided at a front part guide passage 1b having a spring 5d for pushing back a piston rod of a front part toward a mounting site 1a of the capsule for the tooth restoring material of an upper front end, a support 1c of a central part and a rear guide passage 1f, a piston rod 2 at which a stroke control lever 2d protruding upward from a hole 1g for controlling its stroke protrudes substantially vertically is inserted, a release lever 3 engaged with an outer periphery of the rod 2 in an oblique state in which the lever 3 is always pressed by springs 3d, 4b in engaging holes 3a, 4a in a housing body 1 to prevent the rod 2 from moving by its frictional force, and a push plate 4 for moving the rod 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tooth after mixing and kneading a powder component and a liquid component constituting a tooth restoration material such as a dental cement that is stored in a capsule in a predetermined amount. A tooth for which a capsule for restorative material is attached and the mixed and kneaded tooth restorative material is pushed out toward a treatment site of a patient by a desired amount, and in particular, the tooth is mixed and kneaded in the capsule for tooth restorative material. The present invention relates to an apparatus for extruding a tooth restoration material mixed and kneaded in a capsule, which has an effect of not damaging the capsule for tooth restoration material or the extrusion apparatus itself when the restoration material is extruded.

[0002]

2. Description of the Related Art As a dental treatment method for filling a dental caries part with a tooth restorative material such as dental cement, a powder component and a liquid component constituting the tooth restorative material are separated by a predetermined amount to form one tooth. Stored in a capsule for restorative material, and before using the tooth restorative material, immediately destroy the partition separating the powder component and the liquid component in the capsule for tooth restorative material, and immediately after that, restore the tooth to an automatic kneading machine. Attach the capsule for the material and mix and knead the powder component and the liquid component, and then set the capsule for the tooth restoration material in the extrusion device of the tooth restoration material and restore the mixed and kneaded tooth restoration material to the tooth restoration. A treatment method of pushing out a desired amount from a nozzle of a material capsule toward a treatment site of a patient has become popular.

Various shapes and structures of the capsules for tooth restoration materials used in such a treatment method and various extrusion devices for tooth restoration materials have been proposed, but in dental treatment in recent years, especially from dentists. What was requested was the development of a device that met the following four requirements. After setting the capsule for tooth restorative material in which the powder component and the liquid component are mixed and kneaded to the extruder for the tooth restorative material,
It does not require great force to push the mixed and kneaded tooth restoration material out of the capsule for tooth restoration material. It is possible to reliably push out a desired amount of the mixed and kneaded tooth restorative material from the tooth restorative capsule. To be able to extrude mixed and kneaded tooth restorative materials from the capsule for tooth restorative materials at almost the same gripping condition. To be able to immediately extrude the mixed and kneaded tooth restorative material from the tooth restorative capsule without any play even if the extrusion operation of the tooth restorative material is interrupted and restarted.

Then, as a result of various examinations by the present inventors (et al.), Japanese Patent Laid-Open No. 9-2530 which satisfies all the above four requirements.
In Japanese Patent Laid-Open No. 95, a “pushing device for a tooth restoration material mixed and kneaded in a capsule” was proposed. That is, in order to satisfy the above requirements, it is possible to adopt a mechanism for applying human force to the piston rod for pushing the rear portion of the capsule for tooth restorative material and increasing and transmitting the human force by applying the principle of the boom. In order to meet the above requirements, the moving mechanism of the piston rod that pushes the rear part of the tooth restoration capsule is not a mechanism that repeatedly moves and stops stepwise like the ratchet mechanism. When the force applied to push the rear part of the restorative capsule is removed, the piston rod that pushes the rear part of the tooth restorative capsule moves The member returns to the initial state, but when the force is applied to that member, the piston rod moves immediately In order to meet the above requirements, it is necessary to adopt a mechanism that can push the rear part of the capsule for tooth restoration material in the same manner as the ratchet mechanism. When the tooth moves in the direction of pushing the rear part of the tooth restoration capsule, the movement position can be maintained so that it does not change, but it is necessary to adopt a mechanism that can be operated steplessly rather than stepwise like the ratchet mechanism. It was clarified that there was such a problem, and the "extruding device for a tooth restorative material mixed and kneaded in a capsule" proposed in Japanese Patent Application Laid-Open No. 9-253095 was completed.

However, this Japanese Patent Application Laid-Open No. 9-25309
In the "pushing device for a tooth restoration material mixed and kneaded in a capsule" disclosed in Japanese Patent Publication No. 5, the principle of manpower is used as a mechanism for applying a force to a piston rod for pushing the rear portion of the capsule for a tooth restoration material. By adopting a mechanism that can increase and transmit by applying, the treatment person does not need a large force to push out the mixed and kneaded tooth restoration material from the tooth restoration material capsule, but the treatment is performed. Even if the force applied by the practitioner is small, the force that pushes out the piston rod is increased more than the imagination of the practitioner by the principle of leverage. If you push the piston rod out more than necessary without noticing that all the tooth restoration materials inside are pushed out and you can not push any more, the tooth repair Or worse damage the oral cavity of the patient's wood for the capsule is broken and sprinkled the debris and tooth restoration material of the capsule for the tooth restorative material that was damaged in the oral cavity of the patient,
Occasionally, an accident occurred in which the tooth restoration material extruding device itself was damaged, and the person performing the treatment got injured in the hands or the like.

[0006]

DISCLOSURE OF THE INVENTION The present invention overcomes the above-mentioned drawbacks of the prior art and satisfies all of the above four requirements,
Furthermore, when the tooth restoration material mixed and kneaded in the capsule for tooth restoration material is extruded, it is mixed and kneaded in the capsule for tooth restoration material, which has excellent ability to prevent damage to the capsule for tooth restoration material and the extrusion device itself. It is an object of the present invention to provide an extruding device for a tooth restoration material.

[0007]

Means for Solving the Problems As a result of intensive research aimed at solving such problems, the present inventors (et al.) Have not reached the critical point at which the capsule for tooth restoration material at the mounting site cannot be pushed any further. In addition to adopting a mechanism that physically limits the stroke of pushing out the piston rod,
In addition, it is not possible for the person performing the treatment to push out the piston rod more than necessary without realizing that the tooth restoration material capsule cannot be pushed anymore. Since the engaging portion becomes a blind spot from the person who performs the treatment and the person who performs the treatment cannot grasp the stroke amount of the piston rod, the stroke amount of the piston rod can be immediately grasped by the person performing the treatment at a glance. If a mechanism is adopted, it is possible to physically prevent damage to the tooth restoration material capsule and the tooth restoration material extrusion device itself, and also to prevent damage due to human error. The present invention has been completed by clarifying that the treatment can be performed more efficiently because the standard of the remaining amount of the tooth restoration material can be grasped.

That is, according to the present invention, in the upper part, the mounting portion of the tooth restoration material capsule is provided at the front end, and the front guide path through which the piston rod is movably inserted is penetrated at the front part and pushed to the central front part. A support portion that supports the plate and also serves as a guide path for the piston rod hangs down, and a release lever hole portion for projecting the push-back portion of the release lever upward is opened in the center rear portion, and the piston rod is formed in the rear portion. A stroke regulating hole is formed above the rear guide passage that is movably inserted so as to guide the stroke regulating lever that is provided substantially vertically from the vicinity of the rear end of the piston rod, and the rear end is formed. And a locking portion for locking the rear end of the piston rod, respectively, and is positioned immediately below the rear end of the release lever hole and below the rear guide path. A housing body having a lever angle adjusting convex portion abutting portion, and an initial position defining portion for defining an initial position of the lever below the front portion, and a front guide of the housing body. In the front guide passage of the housing body in the initial state, the groove is formed at a constant pitch at least in a portion engaged with the push plate by penetrating the passage and the supporting portion and being inserted into the rear guide passage at the rear. A groove for fitting a snap ring is provided at a portion located at the rear end, and a step portion is provided in front of the groove, and a diameter in front of the step portion is associated with the rear end of the tooth restoration material capsule. The piston rod has a matching diameter, and a stroke control lever is provided in the vicinity of the rear end so as to project substantially vertically,
A push-back portion protruding from the release lever hole portion of the housing body is provided at the upper end, and an upper portion is provided at the rear end of the release lever hole portion, and a lower portion is provided so as to project near the lower end portion. The release lever spring is constantly pressed by the release lever spring so as to come into contact with the release lever angle adjusting convex contact portion via the adjusting convex portion, and the upper and lower ends of the engaging hole are engaged with each other in the inclined state. It engages with the outer circumference of the piston rod penetrating the hole and prevents the piston rod from moving in its axial direction by its frictional force, and the push-back portion is pushed forward to cause the axial center of the piston rod. At a right angle to the release lever, which does not engage with the outer circumference of the piston rod and prevents the piston rod from moving in the axial direction, and the release lever when the lever is not operated. Engagement in which the piston rod penetrates by being constantly pressed by the push plate spring so that the upper rear surface comes into contact with the front surface of the support portion in the main body of the piston and is perpendicular to the axis of the piston rod. When the hole no longer engages with the outer circumference of the piston rod and the lever is operated so that the upper end of the hole comes into contact with the front surface of the support portion and becomes inclined, the upper and lower ends of the engaging hole engage the outer circumference of the piston rod. And a push plate that moves the piston rod forward in the axial direction by the frictional force, and is screwed rearward from a mounting portion of the front end of the housing body, and the front portion of the piston rod is axially attached to the inner surface thereof. A fixed nut having a through hole that can slide and move in the direction, and a stop nut that is loosely fitted to the piston rod and is engaged with a groove for fitting a snap ring of the piston rod. A release hole provided between a front surface of a ring whose rear surface is supported by a wheel and a rear surface of the fixing nut overcomes a frictional force engaging with an outer circumference of the piston rod. A piston rod pushing back spring for giving a force that does not push the piston rod back in its axial direction and a lever shaft fixed to the housing body are rotatably mounted, and a spring at the rear portion of the housing body at the upper rear end. A spring support portion, in which a front end of a tension spring having a rear end attached thereto is attached to a support portion, is provided, a protrusion portion abutting against an initial position defining portion of the housing body is provided in a front portion, and the above-mentioned upper portion is provided. And a lever provided with a push plate pressing portion that abuts against the lower end rear portion of the push plate, and the lever is provided in the capsule. It is an apparatus for extruding a kneaded tooth restoration material.

Further, the piston rod has a circular transverse cross-section perpendicular to the longitudinal direction, and at least two or more stroke regulating holes are connected to the housing body to change the strokes of the stroke regulating holes. If the hole is opened, it can be used for various types of strokes for tooth restoration materials, and at least two or more mountings can be provided in the mounting portion of the housing body in a direction perpendicular to the longitudinal direction of the housing body. It has also been clarified that the provision of the ridges is preferable because it is possible to deal with capsules for tooth restorative materials having various shapes and strokes.

Further, if a groove having a constant pitch is provided up to a portion of the piston rod which is inserted in the front portion of the rear guide passage in the housing body, not only the pushing operation of the piston rod is sure but also the pushed position. If the engagement hole of the release lever has an oval shape that widens laterally, and the engagement hole of the push plate has an oval shape that widens laterally, the engagement hole and piston rod Since the engagement with the outer periphery of the lever is a line contact, the engagement with the piston rod is more reliable, which is preferable. When a hard contact member is attached to the push plate pressing portion of the lever, the push plate pressing portion of the lever is attached. It was also found that the wear of the steel is reduced, which is preferable.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An extruding device for a tooth restoration material mixed and kneaded in a capsule according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view of an embodiment of an extrusion device for a tooth restoration material mixed and kneaded in a capsule according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a mixture and kneaded in a capsule according to the present invention. FIG. 4 is a front view of another embodiment of the extruding device for a tooth restoration material that has been kneaded, FIG. 4 is a plan view of FIG. 3, and FIG. 5 is a tooth restoration material that is mixed and kneaded in the capsule according to the present invention shown in FIG. 6 is a cross-sectional explanatory view of the extrusion device of FIG. 6, FIG. 6 is a cross-sectional explanatory view taken along the line AA of FIG. 4, and FIG. 7 is a diagram showing the extrusion device of the tooth restoration material mixed and kneaded in the capsule according to the present invention shown in FIG. FIG. 8 is a front view showing the state in which the capsule for restorative material is attached, and FIG. 8 is a side view showing the shape of the piston rod.

In the drawings, reference numeral 1 denotes a housing body, and a powder component and a liquid component constituting a tooth restorative material are stored in a front end of the housing body at a predetermined amount separated from each other by a predetermined amount. A mounting portion 1a for a capsule C for tooth restorative material, in which a liquid component and a liquid component are mixed and kneaded, is provided, and a front guide passage 1b through which a piston rod 2 described later is movably inserted is penetrated in a front portion. A support portion 1c, which supports a push plate 4 described later and also serves as a guide path for the piston rod 2, is provided so as to hang down from the center front portion. Release lever hole 1d that allows the return part 3c to protrude upward
Is opened and the piston rod 2 is provided at the rear.
A stroke regulating hole 1g is formed above the rear guide passage 1f, through which the piston is movably inserted, for guiding the stroke regulating lever 2d, which is provided substantially vertically from the vicinity of the rear end of the piston rod 2, in a protruding state. And a locking portion 1i for locking the rear end of the piston rod 2 in the initial state at the rear end, and a hole for the release lever.
A release lever angle adjusting convex portion abutment portion 1e is formed at a position directly below the rear end portion of 1d and below the rear guide path 1f, and an initial position of a lever 6 described below is provided below the front portion. An initial position defining unit 1h for defining is provided.

When at least two stroke regulating holes 1g are provided, the stroke switching hole 1j for communicating the rear ends of the stroke regulating holes 1g is opened as shown in FIG. Need to be present.

Further, as shown in FIG. 5, at least two or more for engaging with a groove groove provided on the outer periphery of the tooth restoration material capsule C in the mounting portion 1a in a direction perpendicular to the longitudinal direction of the housing body 1. It is preferable that the mounting protrusions 1k are provided because various types of capsules C for tooth restorative material can be reliably engaged with the mounting portion 1a.

Reference numeral 2 denotes a piston rod which penetrates through the front guide passage 1b and the support portion 1c of the housing body 1 and is inserted into the rear guide passage 1f at the rear side and is retained by the retaining portion 1i in the initial state. A groove 2a having a constant pitch is provided in a portion to be engaged with a push plate 4 which will be described later, and preferably a groove 2a having a constant pitch is provided even in a portion inserted into the front portion of the rear guide passage 1f in the housing body 1. In the initial state, a groove 2b for fitting a snap ring is provided in a portion located at the rear end of the front guide path 1b of the housing body 1, and a step 2c is provided in front of the groove 2b. The diameter in front of the stepped portion 2c engages with the rear end of the tooth restoration material capsule C to push out the mixed and kneaded tooth restoration material in the tooth restoration material capsule C attached to the attachment portion 1a. Has a diameter, and is near the end Stroke regulation lever. 2d
Are projected almost vertically. This stroke control lever
2d is projected upward from the stroke restricting hole 1g of the housing body 1 and serves to restrict the stroke of the piston rod 2 to the length of the stroke restricting hole 1g in the longitudinal direction.

Further, at least two stroke regulating holes 1g formed in the housing body 1 are provided, and a stroke switching hole 1j for communicating the rear ends of the stroke regulating holes 1g is opened. In this case, it is necessary that the cross-sectional shape of the piston rod 2 perpendicular to the longitudinal direction is circular, and in such an embodiment, as shown in FIG. 6, the stroke regulating lever 2d protrudes outside the housing body 1. By pinching the part, the piston rod 2 is rotated about its axis, and the stroke control lever 2d is moved within the stroke switching hole 1j to adjust the stroke of the tooth restoration capsule C for stroke control. By selecting the hole portion 1g, the extrusion device of the tooth restorative material mixed and kneaded in one capsule with respect to the tooth restorative capsule C of several kinds of strokes is selected. Preference is is in since it is the corresponding possible.

A push-back portion 3c protruding from the release lever hole 1d of the housing body 1 is provided at the upper end of the housing 3, and the upper portion projects toward the rear end of the release lever hole 1d and the lower portion near the lower end. Release lever angle adjustment protrusion provided
The release lever is constantly pressed by the release lever spring 3d so as to come into contact with the release lever angle adjusting convex portion abutment portion 1e of the housing body 1 via 3b. Engaging hole 3a
When the piston rod 2 penetrates through the piston rod 2 and the release lever 3 is inclined as shown in FIG. 5, the upper and lower ends of the engagement hole 3a engage with the outer periphery of the piston rod 2 and the frictional force is generated. The piston rod 2 is prevented from moving in its axial direction, and the push-back portion 3c projecting from the release lever hole portion 1d of the release lever 3 is pushed forward to the axial center of the piston rod 2. When it becomes a right angle, it does not engage with the outer periphery of the piston rod 2 and does not prevent the piston rod 2 from moving in its axial direction. The shape of the engagement hole 3a penetrating the release lever 3 may be a round hole slightly larger than the diameter of the piston rod 2, but when the engagement hole 3a is a round hole as described above, Since the engagement between the engagement hole 3a and the outer periphery of the piston rod 2 is point contact, it is preferable that the engagement hole 3a is an elliptical shape that widens laterally so as to be line contact.

Reference numeral 4 is constantly pressed by a push plate spring 4b so that the upper rear surface abuts on the front surface of a supporting portion 1c which is suspended in the housing body 1 when a lever 6 to be described later is not operated. It is a push plate, and the piston rod 2 penetrates through an engagement hole 4a provided penetrating the push plate 4, and the lever 6 is operated so that the upper end of the push plate 4 comes to the front surface of the support portion 1c. When it abuts and becomes tilted, the engaging hole
The upper and lower ends of 4a engage with the outer circumference of the piston rod 2 to move the piston rod 2 forward in the axial direction by the frictional force, and when the lever 6 is not operated, the supporting portion 1c in the housing body 1 The push plate spring 4b is pressed so that the upper rear surface of the piston rod 2 comes into contact with the front surface of the piston rod 2, and the piston rod 2 is returned to the original right angle state so that it does not engage with the outer circumference of the piston rod 2. The shape of the engaging hole 4a penetrating the push plate 4 may be a round hole slightly larger than the diameter of the piston rod 2, but when the engaging hole 4a is a round hole as described above, Since the engagement between the engagement hole 4a and the outer periphery of the piston rod 2 is point contact, it is preferable that the engagement hole 4a is an elliptical shape that widens laterally so as to be line contact.

Reference numeral 5 denotes a mounting portion 1a at the front end of the housing body 1.
It is a fixed nut screwed further rearward, and a through hole 5a is formed on the inner surface of the fixed nut, through which the front part of the piston rod 2 can slide and move in the axial direction. Between the front surface of the ring 5c whose rear surface is supported by the retaining ring 5b which is loosely fitted and which is engaged with the retaining ring fitting groove 2b of the piston rod 2 and the rear surface of this fixing nut 5, the piston A spring 5d for pushing back the rod is provided. This piston rod pushing back spring 5d is
When the engagement hole 3a of the release lever 3 is engaged with the outer circumference of the piston rod 2, the friction force between the engagement hole 3a of the release lever 3 and the piston rod 2 is overcome to push the piston rod 2 back in its axial direction. It gives you no power,
When the release lever 3 becomes perpendicular to the axial center of the piston rod 2, a force for pushing the piston rod 2 backward in the axial direction is applied.

Reference numeral 6 denotes a lever rotatably mounted on a lever shaft 6a fixed to the housing body 1. The lever 6 has a rear end on an upper rear end and a rear end on a spring supporting portion 7a at a rear part of the housing main body 1. A spring support portion 6d, to which the front end of the attached tension spring 7 is attached, is provided, a projection portion 6b that comes into contact with the initial position defining portion 1h of the housing body 1 is provided at the front portion, and a push plate is provided at the top. Push plate pressing part that abuts the rear part of the lower end of 4
6c is provided, and when the lever 6 is not operated by the pulling force of the tension spring 7, the protrusion 6b abuts the initial position defining portion 1h of the housing body 1 and is provided so as to hang down inside the housing body 1. The push plate 4 is held in the initial position by the front surface of the supporting portion 1c and the push plate pressing portion 6c. A hard contact member 6e is preferably attached to the push plate pressing portion 6c of the lever 6 so as not to wear due to contact with the lower end rear portion of the push plate 4. The contact member 6e is A rotatable roller is preferable because the operation of pressing the lower end rear portion of the push plate 4 can be smoothly performed.

To use the apparatus for extruding the tooth restoration material mixed and kneaded in the capsule according to the present invention having such a structure, the powder component and the liquid component constituting the tooth restoration material are separated by a predetermined amount. As soon as the partition wall separating the powder component and the liquid component is destroyed in the capsule C for tooth restorative material stored in the capsule C for tooth restorative material, the capsule C for tooth restorative material is immediately transferred to the automatic kneading machine.
The powder component and the liquid component are mixed and kneaded, and then the tooth restoration material capsule C is attached to the housing body 1.
The tooth restorative capsule is set at the mounting portion 1a provided at the front end of the upper part, and before performing this operation, first determine whether the piston rod 2 is at the initial position by projecting from the stroke regulating hole 1g. Check the position of the stroke restriction lever 2d. At this time, the stroke control lever 2d
If is near the rear end of the stroke regulating hole 1g in the longitudinal direction, the piston rod 2 is in the initial position, and the next operation may be performed. However, the front end of the stroke regulating hole 1g in the longitudinal direction. When the stroke regulating lever 2d is located in the vicinity, an operation for returning the piston lot 2 described later to the initial position is performed.

After confirming the initial position, the tooth restorative capsule C in which the powder component and the liquid component are mixed and kneaded is mounted on the tooth restorative capsule provided at the upper front end of the housing body 1. Set it to part 1a. On this occasion,
In the case where two or more mounting projections 1k are provided in the mounting site 1a in a direction perpendicular to the longitudinal direction of the housing body 1, the mounting projections 1k are provided on the outer periphery of the tooth restoration material capsule C to be mounted. It is engaged with the mounting ridge 1k that fits the shape of the recessed groove and the stroke of the tooth restoration material capsule C to be mounted.

In this way, after the tooth restoration material capsule C has been attached to the attachment site 1a, if only one stroke regulating hole 1g is formed, the next operation may be performed as it is. The piston rod 2 has a circular transverse cross-section perpendicular to the longitudinal direction, and at least two or more stroke regulating holes 1g in the housing body 1 and a stroke switching hole communicating the rear ends of the stroke regulating holes 1g with each other. Part 1j
In the case where the and are opened, it is necessary to perform an operation of selecting the stroke regulating hole portion 1g suitable for the stroke length of the mounted tooth restoration capsule C,
This operation is performed by the housing body 1 of the stroke control lever 2d.
Stroke restricting lever by pinching the part protruding outward and rotating the shaft center of piston rod 2 as the central axis
2d is moved in the stroke switching hole 1j to move the stroke regulating lever 2d of the piston rod 2 to the position of the rear end of the stroke regulating hole 1g adapted to the stroke length of the mounted tooth restoration capsule C. Align the position.

Next, by grasping the rear part of the housing body 1 and directing the tip nozzle of the capsule C for tooth restoration material toward the treatment site of the patient, the lever 6 is housed against the tensile force of the tension spring 7 around the lever shaft 6a. When the main body 1 is rotated to the rear side, the projection 6b at the front of the lever 6 separates from the initial position defining portion 1h of the housing body 1 and resists the force of the push plate spring 4b.
6c (contact member 6e if contact member 6e is provided)
Pushes the rear end of the lower end of the push plate 4 and moves it forward, so that the upper end of the push plate 4 comes into contact with the front surface of the support portion 1c of the housing body 1 and is in an inclined state. The upper and lower ends of 4a come into contact with the outer circumference of the piston rod 2, and the frictional force moves the piston rod 2 forward in the axial direction, and the front end portion thereof engages with the rear portion of the tooth restoration material capsule C. The tooth restoration material in the kneaded tooth restoration material capsule C is extruded by a desired amount toward the treatment site of the patient. At this time, since a groove 2a having a constant pitch is provided at a position where the piston rod 2 is engaged with the engagement hole 4a of the push plate 4, the groove 2a and the engagement hole 4a of the push plate 4 are engaged with each other. Then, the phenomenon that the piston rod 2 cannot extrude the tooth restoration material in the tooth restoration material capsule C is reliably prevented.

Then, when the force applied to the lever 6 is released, the lever 6 is rotated about the lever shaft 6a by the tension force of the tension spring 7 in the direction away from the rear side of the housing body 1 and its front portion is rotated. The projection 6b of the housing abuts against the initial position defining portion 1h of the housing body 1 to stop its rotation and return to the initial position, and the push plate 4 is pressed by the compression force of the push plate spring 4b to restore the original piston rod 2 Becomes perpendicular to the axis of the housing, and the piston rod 2 no longer engages with the outer periphery of the housing body 1
The front surface of the supporting portion 1c that is hung inside and the push plate pressing portion 6c (the contact member 6e when the contact member 6e is provided) are held in the initial position.

At this time, the push-back portion 3c protruding from the release lever hole 1d is provided at the upper end, and the upper portion is provided at the rear end of the release lever hole 1d and the lower portion is provided near the lower end. Engagement that penetrates through the release lever 3 that is constantly pressed by the release lever spring 3d so as to abut the release lever angle adjusting convex portion abutment portion 1e via the release lever angle adjusting convex portion 3b. Since the upper and lower ends of the hole 3a are engaged with the outer circumference of the piston rod 2 and the frictional force prevents the piston rod 2 from moving in the axial direction, the piston rod 2 is a capsule for tooth restoration material. The state in which the tooth restorative material in C is stopped at a position where it is pushed out by a desired amount is maintained.

In such a state, if a groove 2a having a constant pitch is provided even in a portion of the housing body 1 of the piston rod 2 that is inserted into the front portion of the rear guide passage 1f, some external force will be applied to the piston. The engagement between the upper and lower ends of the engagement hole 3a formed through the release lever 3 and the outer periphery of the rear portion of the piston rod 2 due to the action on the rod 2 or the impact force applied to the housing body 1 Even if a phenomenon that cannot be maintained occurs, the engagement hole 3a penetrating the release lever 3 engages with this groove 2a and reliably prevents the piston rod 2 from moving in its axial direction. Therefore, it is preferable.

Thereafter, the tip nozzle of the tooth restoration material capsule C is again directed toward the treatment site of the patient, and the lever 6 is moved to the rear side of the housing main body 1 against the tensile force of the tension spring 7 around the lever shaft 6a. When rotated, the tooth restoration material in the tooth restoration material capsule C immediately kneaded in the same manner as described above is extruded by a desired amount toward the treatment site of the patient.

By repeating the operation of pushing out the tooth restorative material in the capsule C for tooth restorative material in this manner, the piston rod 2 gradually moves forward in the axial direction and near the rear end of the piston rod 2. The stroke regulating lever 2d that is provided substantially vertically projects inside the stroke regulating hole 1g formed above the housing body 1 (in the mode in which two or more stroke regulating holes 1g are formed, the selected stroke Because the piston rod 2 moves forward in the restriction hole 1g) by the same distance as the piston rod 2 moves, the teeth of the piston rod 2 are restored by the position of the stroke restriction lever 2d and the position of the front end of the stroke restriction hole 1g. It is possible to grasp the standard of the remaining amount of the tooth restoration material in the material capsule C, and when the stroke regulating lever 2d reaches the position of the front end of the stroke regulating hole 1g. , Stroke restriction lever 2d
Comes into contact with the front end of the stroke regulating hole 1g to reliably prevent the piston rod 2 from moving further forward in the axial direction. Therefore, the tooth restoration material capsule C and the tooth restoration material mounted in the mounting portion 1a and The damage of the device of the present invention itself is physically and reliably prevented.

When the treatment is thus completed, the push-back portion 3c of the release lever 3 protruding upward from the release lever hole 1d opened above the rear portion of the housing body 1 is pushed forward to release the release lever 3. The release lever 3 moves forward against the pressing force of the release lever spring 3d on the front side of the release lever 3 and becomes perpendicular to the axial center of the piston rod 2 so as to penetrate the release lever 3. Since the engagement hole 3a does not engage with the outer circumference of the piston rod 2, the piston rod 2 is pushed by the compression force of the piston rod pushing back spring 5d until the rear end of the piston rod 2 comes into contact with the locking portion 1i of the housing body 1. The release lever 3 is pushed back to the rear side, and the release lever 3 is pushed downward by the release lever spring 3d so that the upper portion thereof is located at the rear end of the release lever hole portion 1d and the lower portion thereof. Is the housing body 1 near the lower end
Release lever angle adjustment projection 3b protruding toward the rear end
The initial state of contacting the release lever angle adjusting convex portion abutting portion 1e is returned via the.

[0031]

As described above in detail, the apparatus for extruding the tooth restoration material mixed and kneaded in the capsule according to the present invention has a relatively simple structure and thus can be manufactured inexpensively and easily. The force applied to push the mixed and kneaded tooth restorative material out of the capsule for tooth restorative material is applied by the lever principle to increase and transmit the mechanism. The tooth restoration material, which is a mixture of a liquid component and a liquid component, becomes a paste and its fluidity is reduced, and even if the friction with the tooth restoration capsule is large, it can be easily extruded with a small force. In addition to the above, a stroke-regulating hole for projecting a stroke-regulating lever, which is provided substantially vertically from the vicinity of the rear end of the piston rod, is opened in the rear above the housing body. It is possible to physically prevent damage to the cell and the device of the present invention and also prevent damage due to human error, reduce the burden on the person performing the treatment, and accidents due to medical errors that have become a problem in recent years. It is very effective in preventing the above-mentioned problems, and moreover, the guideline of the residual amount of the tooth restorative material in the tooth restorative capsule can be grasped, so that the treatment can be carried out more efficiently.

Further, the piston rod has a circular cross section perpendicular to the longitudinal direction, and at least 2 is formed in the housing body.
If the stroke regulating hole and the stroke switching hole communicating the rear ends of the stroke regulating holes are opened, one device of the present invention can be used as a capsule for tooth restoration material of various types of strokes. Since it is possible to cope with this, it is not necessary to prepare an extruder for mixing and kneading the tooth restoration material in several kinds of capsules corresponding to the capsule for tooth restoration material, which is very economical.

Furthermore, if at least two or more mounting projections are provided in the mounting site of the capsule for tooth restoration material in the direction perpendicular to the longitudinal direction of the housing body, one device of the present invention can increase the number of mounting projections. It can be applied to tooth restoration capsules of various shapes and strokes.

The value of contributing to the field of dentistry of the apparatus for extruding the tooth restoration material mixed and kneaded in the capsule according to the present invention having such various effects is very large.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of an apparatus for pushing out a tooth restoration material mixed and kneaded in a capsule according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of another embodiment of the extrusion device of the tooth restoration material mixed and kneaded in the capsule according to the present invention.

FIG. 4 is a plan view of FIG.

5 is a cross-sectional explanatory view of an apparatus for extruding the tooth restoration material mixed and kneaded in the capsule according to the present invention shown in FIG.

6 is a cross-sectional view taken along the line AA of FIG.

7 is a front view showing a state in which the capsule for tooth restorative material is attached to the pushing device for the tooth restorative material mixed and kneaded in the capsule according to the present invention shown in FIG. 3. FIG.

FIG. 8 is a side view showing the shape of a piston rod.

[Explanation of symbols]

1 housing body 1a mounting site 1b Front guideway 1c support 1d release lever hole 1e Release lever angle adjustment convex contact part 1f Rear guideway 1g Stroke control hole 1h Initial position regulation part 1i locking part 1j Stroke switching hole 1k mounting ridge 2 piston rod 2a groove 2b Groove for fitting snap ring 2c step 2d stroke control lever 3 release lever 3a Engagement hole 3b Release lever angle adjustment protrusion 3c Push back part 3d release lever spring 4 push plate 4a Engagement hole 4b Push plate spring 5 fixing nut 5a through hole 5b retaining ring 5c ring 5d piston rod push back spring 6 lever 6a lever shaft 6b protrusion 6c Push plate pressing part 6d spring support 6e Abutment member 7 Tension spring 7a Spring support part C Tooth restoration capsule

Continued front page    (72) Inventor Kazuya Ishida             53 Higashihara, Minami-Nasu Town, Nasu District, Tochigi Prefecture             In ceremony company Shioda F-term (reference) 4C052 AA17 HH05

Claims (6)

[Claims] 1. A capsule for tooth restorative material at the front end in the upper part.
The front part of the mounting portion (1a) of (C) is pierced by the front guide path (1b) through which the piston rod (2) is movably inserted, and supports the push plate (4) at the center front part. At the same time, a supporting portion (1c) that also serves as a guide path for the piston rod (2) hangs down,
A release lever hole (1d) for opening the push-back part (3c) of the release lever (3) to the upper part is opened in the center rear part, and the piston rod (2) is movably inserted in the rear part. A stroke regulating hole (1g) is formed above the passage (1f) for guiding the stroke regulating lever (2d) which is provided substantially vertically from the vicinity of the rear end of the piston rod (2) in a protruding state. At the rear end thereof, there are provided locking portions (1i) for locking the rear end of the piston rod (2) respectively, and the locking portions (1i) are located directly below the rear end portion of the release lever hole (1d). A release lever angle adjusting convex contact portion (1e) is formed below the rear guide path (1f), and an initial position for defining the initial position of the lever (6) is formed below the front portion. Position regulation part (1h)
The housing main body (1) provided with the housing main body (1), the front guide passage (1b) and the support portion (1c) of the housing main body (1), and the rear is inserted into the rear guide passage (1f). A groove (2a) having a constant pitch is provided in a portion engaged with the push plate (4), and a portion located at a rear end in the front guide path (1b) of the housing body (1) in an initial state. The groove (2b) for fitting the snap ring is provided on the groove
A step portion (2c) is provided in front of (2b), and a diameter in front of the step portion (2c) is a diameter that engages with the rear end of the tooth restoration material capsule (C). A piston rod (2) with a stroke restriction lever (2d) protruding vertically in the vicinity
And a hole (1) for the release lever of the housing body (1) at the upper end.
The release lever angle adjusting protrusion is provided with a push-back portion (3c) projecting from the d), the upper portion protruding at the rear end of the release lever hole (1d), and the lower portion protruding near the lower end. (3b)
It is constantly pressed by the release lever spring (3d) so as to come into contact with the release lever angle adjusting convex contact portion (1e) via, and in the tilted state, the upper end of the engaging hole (3a) The lower end engages with the outer circumference of the piston rod (2) penetrating the engaging hole (3a) and prevents the piston rod (2) from moving in its axial direction by its frictional force, When the push-back portion (3c) is pushed forward and becomes perpendicular to the axial center of the piston rod (2), the piston rod (2) does not engage with the outer circumference of the piston rod (2) and the piston rod (2) moves its axis. The release lever (3) that does not block the movement in the direction and the housing body when the lever (6) is not operated.
(1) is constantly pressed by the push plate spring (4b) so that the upper rear surface comes into contact with the front surface of the supporting portion (1c) in the state that it is perpendicular to the axis of the piston rod (2). The engagement hole (4a) through which the piston rod (2) penetrates does not engage with the outer periphery of the piston rod (2), and the lever
When (6) is operated and its upper end abuts against the front surface of the supporting portion (1c) and becomes in a tilted state, the upper and lower ends of the engaging hole (4a) engage with the outer periphery of the piston rod (2). And a push plate (4) for moving the piston rod (2) forward by its frictional force in the axial direction, and a push plate (4) screwed rearward from a mounting portion (1a) at the front end of the housing body (1). A fixed nut (5) having a through hole (5a) formed on the inner surface thereof so that the front part of the piston rod (2) can slide and move in the axial direction, and a fixed nut (5) loosely fitted to the piston rod (2). Groove for fitting the snap ring of the piston rod (2)
The release lever (3) is provided between the front surface of the ring (5c) whose rear surface is supported by the retaining ring (5b) engaged with (2b) and the rear surface of the fixing nut (5). ) Engaging hole (3
a) a piston rod pushing back spring (5d) for giving a force that does not push back the piston rod (2) in the axial direction by overcoming the frictional force engaging with the outer circumference of the piston rod (2); It is rotatably mounted on a lever shaft (6a) fixed to the housing body (1), and the housing body is provided at the upper rear end.
(1) The spring support portion (7a) at the rear part is provided with the spring support part (6d) to which the front end of the tension spring (7) is attached, and the housing main body (1) is provided at the front part. A lever (6b) provided with a protrusion (6b) that comes into contact with the initial position defining portion (1h) of the above, and a push plate pressing portion (6c) that comes into contact with the lower end rear portion of the push plate (4) above. 6) An extrusion device for a tooth restoration material mixed and kneaded in a capsule, which comprises: 2. The piston rod (2) has a circular transverse cross section perpendicular to the longitudinal direction, and the housing body (1) has at least two or more stroke restriction holes (1g) and the stroke restriction holes. The extrusion device for a tooth restoration material mixed and kneaded in a capsule according to claim 1, wherein a stroke switching hole portion (1j) communicating between the rear ends of (1g) is opened. 3. The mounting portion (1a) of the housing body (1) is provided with at least two or more mounting projections (1k) in a direction perpendicular to the longitudinal direction of the housing body (1). An extrusion device for a tooth restoration material mixed and kneaded in the capsule according to claim 1. 4. The housing body of the piston rod (2)
In the capsule according to any one of claims 1 to 3, wherein a groove (2a) having a constant pitch is provided even in a portion of the rear guide path (1f) that is inserted into the front portion in (1). Extruder for mixed and kneaded tooth restoration material. 5. The engagement hole (3a) of the release lever (3) has an elliptical shape which is widened laterally, and the engagement hole of the push plate (4).
The extruding device for a tooth restoration material mixed and kneaded in a capsule according to any one of claims 1 to 4, wherein (4a) has an elliptical shape that is laterally widened. 6. The push plate pressing portion (6) of the lever (6).
A hard contact member (6e) is attached to c).
An extruder for the tooth restoration material mixed and kneaded in the capsule according to any one of 1 to 5.