JP2012045046A - Dental syringe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dental syringe allowing an easy and certain discharge of a desired amount of dental material from inside a barrel, and allowing one-handed easy use.SOLUTION: This dental syringe includes: a barrel body 1 formed with a flange part 1e around the other end or the vicinity thereof of the barrel 1d wherein the dental material is previously stored, wherein a cap 1a is covered on a discharge port of one end, and wherein an inner plug 1c is inserted from an opening end 1b of the other end to tightly close the barrel 1d; a spring setting body 2 formed integrally with the barrel body 1 or bonded and fixed to the barrel body 1; and a plunger body 3 formed with ratchet teeth 3b on the side face of a plunger 3a for pressing out the dental material by pressing the inner plug 1c. The dental syringe includes a ratchet mechanism wherein an end part 4a of a spring member 4 installed to a spring installation part 2a of the spring setting body 2 is locked to the ratchet teeth 3b of the plunger 3a to restrict the plunger 3a such that, when the plunger 3a is inserted into the barrel 1d, the plunger 3a can move only to a direction to which the plunger 3a is inserted into the barrel 1d.

Description

  The present invention relates to a dental syringe that can easily and reliably discharge a desired amount of dental material from a barrel and can be easily used with one hand.

  BACKGROUND ART A dental syringe (filled syringe) in which a dental material is filled in a barrel in advance is widely used because of its ease of use. In the case of a dental syringe pre-filled with such a dental material, the dental material is discharged onto a kneaded paper to be mixed, or used by being discharged from a nozzle so as to be directly applied to the oral cavity. . And since it may be used for several times with respect to one treatment location, or it may be used for several places, the syringe with which the quantity for several times was enclosed is used in many cases.

  In such a dental syringe filled with multiple doses, the dental material is pushed out by the plunger while reading the scale attached to the barrel, etc., but the exact amount can be discharged only by the pushing operation of this plunger. In addition to being very difficult, it was also difficult to determine the discharge amount when the material constituting the barrel was not transparent.

  In addition, a dental syringe filled with dental material may be used by mixing two types of dental material immediately before use. In such a case, the dental material is accurately and simultaneously discharged from the two syringes. Therefore, it is difficult to discharge a desired amount even more.

  For the problem that it is difficult to discharge such a desired amount, a syringe body provided with a nozzle on one end side, a plunger inserted into the syringe body from the other end side, and a liquid inside the syringe body And a liquid reservoir that discharges the liquid from the nozzle side by reducing the internal volume by the pressing force from the plunger, the prefilled syringe comprising an inner peripheral surface of the syringe body and the plunger One of them is formed with ratchet teeth along the direction connecting the one end side and the other end side of the syringe body, and the other is formed with a ratchet claw meshing with the ratchet teeth. There is a prefilled syringe (see, for example, Patent Document 1 Claim 5).

  This prefilled syringe is composed of a syringe body (barrel), a plunger, and a liquid reservoir inside the syringe body (barrel), and the syringe body and plunger are provided with a ratchet mechanism by ratchet teeth and ratchet claws. Therefore, the plunger can be accurately moved at predetermined intervals.

  However, in this prefilled syringe, the medicine or the like is not directly stored in the syringe body (barrel), but is stored in a liquid reservoir formed of a flexible material or the like (Patent Document 1, paragraph number 0015, 0017), because the plunger is pushed out and discharged so that the liquid reservoir is folded (paragraph number 0015 in Patent Document 1), or the liquid reservoir is sandwiched between a pair of rollers to be discharged (Patent Document 1). (Paragraph 0017), it is difficult to discharge an accurate amount compared to the case where a medicine stored directly inside the syringe body (barrel) is pushed out by a plunger, and a plurality of syringes are used simultaneously in this prefilled syringe. This is not considered at all.

JP-A-2005-27831

  In view of the above problems, an object of the present invention is to provide a dental syringe that can easily and reliably discharge a desired amount of dental material from the barrel and that can be easily used with one hand.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor has found that a dental syringe is preliminarily stored with a dental material, a cap is put on a discharge port at one end, and an inner plug is inserted from the opening end at the other end. A barrel body in which a flange portion is formed around the other end or in the vicinity of the barrel that is fitted and sealed, and a spring mounting portion is located at a position that is opposite to the discharge port from the opening end of the barrel. Along the longitudinal direction on the side of the plunger for pushing out the dental material by pushing into the barrel inserted into the barrel and pressing the internal plug, the spring installation body being integrally fixed to the barrel body or adhesively fixed to the barrel body If it is made up of a plunger body with ratchet teeth, it can be easily held with one hand by hooking a finger on the flange of the barrel body and pressing the end of the plunger body with a finger or palm. The desired amount of dental material can be easily discharged from the barrel by pushing the end of the plunger body with a finger or palm, and when the plunger is inserted into the barrel, the spring of the spring installation body If a ratchet mechanism is provided in which the end of the spring member attached to the attachment portion is locked to the ratchet teeth of the plunger to restrict the plunger to move only in the direction in which it is inserted into the barrel, the plunger is placed in the barrel. When pushed, the end of the spring member is sequentially locked to the ratchet teeth, so the amount of movement of the plunger can be judged by the contact sound and the number of responses at that time, and the scale attached to the barrel can be read The present invention was completed by investigating that an accurate amount can be discharged only by pushing the plunger.

That is, the present invention relates to the other end of the barrel in which the dental material is stored in advance, the cap is put on the discharge port on one end, and the inner plug is inserted and sealed from the opening end on the other end. A barrel body with a flange formed around the vicinity;
A spring installation body that is integrally fixed to the barrel body or bonded and fixed to the barrel body so that the spring mounting portion is located at a portion located on the opposite side of the discharge port from the opening end of the barrel;
It is composed of a plunger body in which ratchet teeth are formed along the longitudinal direction on the side surface of the plunger that is inserted into the barrel and presses the inner plug to push out the dental material,
When the plunger is inserted into the barrel, the end of the spring member attached to the spring mounting portion of the spring installation body is locked to the ratchet teeth of the plunger so that the plunger can move only in the direction in which the plunger is inserted into the barrel. The dental syringe is provided with a ratchet mechanism for restricting in such a manner.

  The barrel body is composed of two barrels provided side by side, and the plunger body is composed of two integrated parallel plungers that are respectively inserted into the barrels. The ratchet teeth are formed along the longitudinal direction, and the ratchet mechanism is engaged with the ratchet teeth of each plunger at both ends of the spring member attached to the spring mounting portion of the spring installation body so as to be positioned between both plungers. If a ratchet mechanism that restricts each plunger to move only in the direction in which it is inserted into the barrel, a similar ratchet tooth is formed on the two plungers, so that only one plunger has a large load during extrusion. Since it is possible to move smoothly, it is possible to move from each barrel in spite of using two barrels. And conveniently at Preferred to be able to eject the dental material at the same time.

  Furthermore, if the spring member attached to the spring attachment portion of the spring installation body is a leaf spring or a torsion coil spring, the ratchet mechanism can be manufactured easily and inexpensively, which is preferable.

  The dental syringe according to the present invention includes a barrel in which a dental material is stored in advance, a cap is put on a discharge port on one end, and an inner plug is inserted and sealed from the opening end on the other end. A barrel body in which a flange portion is formed around the other end or in the vicinity thereof, and a barrel body or a barrel body so that the spring mounting portion is located at a portion located on the opposite side of the discharge port from the opening end of the barrel A spring installation body that is adhesively fixed to the plunger, and a plunger body in which ratchet teeth are formed along the longitudinal direction on the side surface of the plunger that is inserted into the barrel and presses the inner plug to push out the dental material; Because it is composed of the above, it can be easily held with one hand by hooking a finger on the flange part of the barrel body and pressing the end of the plunger body with a finger or palm, and with the finger or palm By pushing the end, a desired amount of dental material can be easily discharged from the barrel, and when the plunger is inserted into the barrel, the spring member attached to the spring mounting portion of the spring installation body A ratchet mechanism is provided in which the end portion is locked to the ratchet teeth of the plunger so as to restrict the plunger to move only in the direction in which it is inserted into the barrel, and the ratchet teeth when the plunger is pushed into the barrel. Since the end of the spring member is sequentially locked, the amount of movement of the plunger can be determined by the contact sound and the number of responses at that time, and only the plunger is pushed out without reading the scale on the barrel. Thus, an accurate amount can be discharged.

  Further, it is composed of two barrels provided with a barrel body, and the plunger body is composed of two parallel plungers which are respectively inserted into the barrels, and the side surfaces of both plungers facing each other. The ratchet teeth are formed along the longitudinal direction of the spring member, and both end portions of the spring member attached to the spring mounting portion of the spring installation body are engaged with the ratchet teeth of each plunger so that the ratchet mechanism is located between both plungers. If it is an aspect that is a ratchet mechanism that is stopped and restricts each plunger to move only in the direction in which it is inserted into the barrel, by forming similar ratchet teeth on the two plungers, Since only a plunger is not subjected to a large load during extrusion, smooth movement is possible, so even if two barrels are used It is preferable that the dental material can be simultaneously and accurately discharged from each barrel, and if the spring member attached to the spring mounting portion of the spring installation body is a leaf spring or a torsion coil spring, It is preferable that the ratchet mechanism can be easily and inexpensively manufactured.

It is a perspective view which shows one Example of the dental syringe which concerns on this invention. It is a perspective view which shows the state which decomposed | disassembled the dental syringe which concerns on FIG. It is a perspective view which shows the other Example of the dental syringe which concerns on this invention. It is a perspective view which shows the state which decomposed | disassembled the dental syringe which concerns on FIG. It is a perspective view which shows the state which decomposed | disassembled the further another Example of the dental syringe which concerns on this invention.

  Hereinafter, the dental syringe according to the present invention will be described in detail with reference to the drawings.

  In the drawings, reference numeral 1 denotes a barrel 1d in which a dental material is stored in advance, a cap 1a is put on a discharge port at one end, and an inner plug 1c is inserted and sealed from an opening end 1b at the other end. This is a barrel body in which a flange portion 1e is formed around the other end or the vicinity thereof. The barrel body 1 is a cartridge type in which a dental material is housed in the barrel 1d, and a cap 1a is inserted into the discharge port at one end and the inner plug 1c is inserted from the opening end 1b at the other end. Things can be used. Moreover, even if the barrel body 1 is the aspect comprised from the two barrel 1d provided side by side, there is no limitation in particular in the shape.

  Reference numeral 2 denotes a spring installation body that is integrally fixed to the barrel body 1 or bonded to the barrel body 1 so that the spring mounting portion 2a is located at a portion located on the opposite side of the discharge port from the opening end 1b of the barrel 1d. .

  Reference numeral 3 denotes a plunger body in which ratchet teeth 3b are formed along the longitudinal direction on the side surface of the plunger 3a which is inserted into the barrel 1d and presses the inner plug 1c to extrude the dental material. Since the plunger 3a of the plunger body 3 presses the inner plug 1c in the barrel 1d as shown in FIGS. 1 to 5 to push out the dental material, the inner plug 1c needs to be in close contact with the inner surface of the barrel 1d. The plunger 3a for pushing it out does not require high fitting accuracy with the barrel 1d.

  Reference numeral 4 denotes a spring member attached to the spring attachment portion 2 a of the spring installation body 2. When the plunger 3a is inserted into the barrel 1d, the end 4a of the spring member 4 is locked to the ratchet teeth 3b of the plunger 3a so that the plunger 3a can move only in the direction in which the plunger 3a is inserted into the barrel 1d. It is a ratchet mechanism that regulates to.

  Also, the barrel body 1 is composed of two barrels 1d, and the plunger body 3 is composed of two parallel plungers 3a which are respectively inserted into the barrels 1d. In the aspect in which the ratchet teeth 3b are formed along the longitudinal direction on the opposing side surfaces of the plunger 3a, the spring attached to the spring mounting portion 2a of the spring installation body 2 so that the ratchet mechanism is located between the plungers 3a. Since the both ends 4a of the member 4 are locked to the ratchet teeth 3b of the plungers 3a, a ratchet mechanism is provided that restricts the plungers 3a to move only in the direction of insertion into the barrel 1d. By forming the same ratchet teeth on the plunger of, it is possible to move smoothly without pushing a large load on only one plunger during extrusion, Despite using this barrel is the preferred to be able to eject simultaneously accurately and conveniently dental material. Furthermore, if the spring member 4 is a leaf spring or a torsion coil spring, the ratchet mechanism can be easily and inexpensively manufactured, which is preferable.

  In order to actually use such a dental syringe according to the present invention, first, a barrel body 1 and a spring installation body 2 are integrally formed, or the barrel body 1 and the spring installation body 2 are prepared. 2 and 4, the barrel body 1 has a flange portion 1e formed around the opening end 1b of the barrel 1d, as shown in FIGS. 2 and 4, and a portion of the barrel 1d on the opening end 1b side. Is a state protruding from the flange portion 1e toward the side opposite to the discharge port, the spring installation body 2 is externally fitted and fixed to the protruding portion of the barrel body 1 (FIGS. 1 and 3). .

  Further, in the case where the barrel body 1 has a flange portion 1e formed around the open end 1b of the barrel 1d as shown in FIG. 5, and the portion of the barrel 1d on the open end 1b side does not protrude from the flange portion 1e. The cylindrical part of the spring installation body 2 is inserted into the barrel 1d and bonded and fixed to the barrel body 1 or the spring installation body 2 is attached to the flange portion 1e of the barrel body 1 (not shown). It may be bonded and fixed.

  Next, the plunger 3a of the plunger body 3 is inserted into each barrel 1d with the end 4a of the spring member 4 installed in the spring installation body 2 engaged with the ratchet teeth 3b of the plunger 3a. Then, the inner plug 1c in the barrel 1d is pressed so that the dental material is stably discharged, for example, until the dental material is slightly discharged.

  After this state, for example, if the index finger and the middle finger are hooked on the flange portion 1e of the barrel body 1 and the end opposite to the discharge port of the plunger body 3 is pushed with the thumb or the palm, it can be easily done with one hand. Can be operated. When the plunger 3a is inserted into the barrel 1d, the end 4a of the spring member 4 is sequentially locked so as to get over the individual teeth constituting the ratchet teeth 3b one by one. Since the amount of movement of the plunger body 3 can be accurately grasped by counting the contact sound and the number of responses, a desired amount of dental material can be easily and easily obtained. It can be discharged reliably.

  Also, as shown in FIGS. 3 to 5, in a mode in which similar ratchet teeth 3b are formed on the two plungers 3a, a large load is not applied to only one plunger 3a during extrusion, and smooth movement becomes possible. Despite the use of the barrel body 1 composed of the two barrels 1d, the dental material can be discharged simultaneously and accurately from the two barrels 1d.

1 barrel body
1a cap
1b Open end
1c Inner plug
1d barrel
1e Flange part 2 Spring installation body
2a Spring mounting part 3 Plunger body
3a Plunger
3b Ratchet teeth 4 Spring member
4a end

Claims (3)

A barrel (1d) in which a dental material is stored in advance, a cap (1a) is put on the discharge port at one end, and the inner plug (1c) is inserted and sealed from the opening end (1b) at the other end A barrel body (1) having a flange (1e) formed around the other end or the vicinity thereof;
Either the barrel body (1) or the barrel body (1) so that the spring mounting portion (2a) is located at a portion located on the opposite side of the discharge port from the open end (1b) of the barrel (1d). A spring installation body (2) fixedly bonded to
A ratchet tooth (3b) is formed along the longitudinal direction on the side surface of the plunger (3a) inserted into the barrel (1d) to press the inner plug (1c) to push out the dental material. The plunger body (3)
When the plunger (3a) is inserted into the barrel (1d), the end (4a) of the spring member (4) attached to the spring mounting portion (2a) of the spring installation body (2) is (3a) is provided with a ratchet mechanism that is locked to the ratchet teeth (3b) and restricts the plunger (3a) to move only in the direction in which it is inserted into the barrel (1d). A dental syringe. It is composed of two barrels (1d) provided with a barrel body (1), and two parallel plungers in which the plunger body (3) is inserted into each barrel (1d). (3a) and the ratchet teeth (3b) are formed along the longitudinal direction on the opposing side surfaces of both plungers (3a),
Both end portions (4a) of the spring member (4) attached to the spring mounting portion (2a) of the spring installation body (2) so that the ratchet mechanism is positioned between both plungers (3a) are the ratchet of each plunger (3a). The dental syringe according to claim 1, wherein the dental syringe is a ratchet mechanism that is locked to the teeth (3b) and restricts each plunger (3a) so as to move only in a direction in which the plunger (3a) is inserted into the barrel (1d).   The dental syringe according to claim 1 or 2, wherein the spring member (4) attached to the spring attachment portion (2a) of the spring installation body (2) is a leaf spring or a torsion coil spring.

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