JP4500035B2 - Dental solid collector and manufacturing method thereof - Google Patents

Description

  The present invention relates to a dental unit for connecting a tip of a hose extended from a vacuum handpiece or a saliva discharge handpiece used by an assistant in a dental unit during treatment, and sucking and discharging tooth cutting powder and saliva to the outside. The present invention relates to a solid collector and a manufacturing method thereof.

As shown in FIG. 5, a conventional solid collector is integrally formed with a main body part a, an introduction part b formed integrally above the main body part a by injection molding of vinyl chloride resin, and a lower part of the main body part a. The discharge part c formed in the above is formed. And since the vinyl chloride resin has low mechanical strength in the introduction part b for connecting the hose d from the vacuum handpiece or the saliva discharge handpiece, the metal screw fitting b for connecting the hose is used. _1, and a fitting nut d ₁ attached to the tip of the hose d was screwed into the screw fitting b ₁ so as to be detachably attached. Incidentally, d ₂ is the O-ring for a screw fitting b ₁ and fitting nut d ₁ and watertight.
Vacuum handpieces and spit on the Spitton balls used by the photograph assistants at CP-ONE and BELPOT2 on the Takara Belmont website (http://www.takarabelmont.co.jp/dental/index.html) Connected to the hose base end of the handpiece is a solid collector, but the picture does not disclose the internal structure.

  By the way, in the above-mentioned conventional example, since it is necessary to attach a screw fitting in order to connect the hose d and the solid collector, the number of parts is increased and the number of parts is increased. In addition, it has become difficult to use vinyl chloride resin due to recent pollution problems.

  Therefore, there is a material made of polypropylene resin that does not cause pollution and has high chemical resistance. However, the polypropylene resin is weak in strength and has poor adhesion, so the hose is directly joined to the solid collector. Because it is impossible to detachably connect to the part, and because the screw fitting was pressed into the connecting part, the pollution problem was solved, but the assembly man-hours increased and the number of parts also increased. There was the same problem as conventional vinyl chloride resin.

  The present invention is intended to solve the above-mentioned problems, and the object of the present invention is to form a polyacetal which is composed entirely of polypropylene resin having excellent chemical resistance and has excellent wear resistance at the connection portion with the hose. To provide a dental solid collector integrated with polypropylene resin and a method of manufacturing the same so that the hose can be directly connected using resin and the polyacetal resin is securely integrated with the entire polypropylene resin. There is.

Dental Solid collector according to the present invention is intended to St achieve the object described above, it is formed of a resin having chemical resistance, and a solid collector body in which a plurality of connecting portions are made form, abrasion resistance A coupling coupling formed of a resin having the same number of sleeves as the plurality of connecting portions formed in the solid collector body, the coupling coupling being inserted , formed of the same resin as the solid collector body If, consists, the joint coupling is detachable and connected to the connecting member to the hose tip than treatment instrument, and is formed so as locking possible, the sleeve, inserting the connection member an opening is formed, and set the sleeve in the injection molding die while fitted into the sleeve to the joint coupling, said solid Kore By injection molding the coater body, formed by integrating the above and the solid collector body sleeve, and wherein the.

  According to a second aspect of the present invention, in the above-described first aspect, the joint coupling is formed with a vertical groove and an arc groove for guiding an engaging protrusion formed on the connection member, and the engaging groove is engaged with the engagement groove. A protruding piece for locking the mating protrusion is formed.

According to a third aspect of the present invention, there is provided a dental solid collector manufacturing method comprising: a step of forming a plurality of sleeves with a resin having chemical resistance; and a connecting member connected to a tip of a hose from a surgical instrument. And a step of forming a coupling coupling to be fitted in the sleeve so as to be lockable, a step of setting the sleeve in a mold of an injection molding machine, and the same as the sleeve in the mold And a step of forming a solid collector main body by injection molding by injection molding, and after the injection molding, the solid collector main body and the sleeve are melted and integrated, so that the joint coupling becomes the solid collector main body. It is characterized by being fixed in close contact with the main body.

It means according to claim 4, in unit according to claim 3 mentioned above, before kissing Reeve connected by a connecting piece, characterized in that it is melted integrated in the solid collector body during the injection molding of the solid collector body.

According to a fifth aspect of the present invention, in the above-mentioned means of the third aspect, the sleeve has a stepped portion, and is set at the position of the outlet line of the resin to be injected when the sleeve is set. the with the resin having a chemical resistance can be prevented from entering the engaging groove formed in the joint coupling, the joint cup by molding pressure at the time of injection of the resin having the chemical resistance to be injected by closer contact with the sleeve and ring, characterized in that so as to prevent leakage of water.

It means according to claim 6, in unit according to claim 3 mentioned above, by forming the groove at a position entering into the mold of the sleeve enters the resin within the groove during injection molding, the joint coupling Is designed to prevent the solid collector body from falling out.

  As described above, according to the present invention, the main body and the sleeve are formed of the resin having chemical resistance, and the coupling coupling formed of the wear-resistant resin is fitted into the sleeve, and the main body and the sleeve are formed by injection molding. As a result of melting and being integrated, the joint coupling becomes watertight with respect to the main body, and water leakage can be reliably prevented.

  In addition, the joint coupling with high wear resistance is formed with a protrusion for locking the engagement protrusion of the connection member connected to the tip of the hose from the surgical instrument, so that the above-described repetitive attachment / detachment is also possible. Since the protruding piece is not damaged by wear, the connecting member can be securely fixed to the joint coupling for a long period of time.

  Further, in the manufacturing method, since the plurality of sleeves are connected by the connecting piece, the coupling coupling can be positioned and rotated with respect to the sleeve, and can be prevented from coming off, and the connecting piece has elasticity. That is, it is possible to realize integration with the main body by absorbing dimensional errors during injection molding.

  Each sleeve has a stepped portion, and when set in the mold, it is set at the position of the outlet line of the resin to be injected, so that the chemical-resistant resin to be injected is a coupling coupling. It is possible to prevent the water from leaking into the joint groove and the sleeve more closely by the molding pressure at the time of injecting the resin.

  Further, by forming a groove at a position where the sleeve enters the mold, the resin does not enter the groove at the time of injection molding, and the coupling coupling does not come out of the main body. Is.

  The joint coupling for detachably attaching and locking the connecting member is made of wear-resistant resin, and the body and the sleeve into which the joint coupling is inserted are made of chemical-resistant resin, At the time of injection molding, the main body and the sleeve are integrated so that the joint coupling is firmly fixed to the main body and is in a watertight state.

Hereinafter, a dental solid collector and a manufacturing method thereof according to the present invention will be described with reference to FIGS.
First, the structure of a dental solid collector will be described. Reference numeral 1 denotes a solid collector main body (hereinafter simply referred to as a main body), and a polypropylene resin excellent in chemical resistance is formed into a bottomed cylindrical shape by injection molding. A groove 11 for fitting and fixing an exterior cover (not shown) is formed on the upper edge, and a flange 12 having a hole 12a for attaching a part of the exterior cover to the circumferential portion. Is formed.

  Furthermore, a large-diameter connecting portion 13 to which a hose from the saliva discharge handpiece communicating with the main body 1 is connected to the circumferential portion, and a small-diameter to which a hose from a vacuum handpiece communicating with the main body 1 is connected. A small-diameter connecting portion 15 to which a hose from another vacuum handpiece that communicates directly with the discharge pipe 15a without directly communicating with the connecting portion 14 and the main body 1 is formed. In addition, the bottom of the main body 1 is formed with a discharge pipe 16 for collecting tooth cutting powder that has entered the main body 1 with a filter (not shown) and discharging saliva to the outside.

  Reference numeral 2 denotes a cylindrical joint coupling formed of a polyacetal resin having excellent wear resistance, and is fixed in each connection portion 13 to 14 of the main body 1. Further, a retaining collar 21 is formed at one end of the joint coupling 2, and the circumferential surface is opposed to the connecting member 3 formed of the polyacetal resin shown in FIG. 2. An engagement groove 22 is formed which includes a vertical groove 22a into which the engagement protrusion 31 is inserted and an arc groove 22b formed in a circumferential direction.

  The arc groove 22b is formed with an engaging protrusion 22c that is engaged when the connecting member 3 is rotated to move the engaging protrusion 31 in the arc groove 22b and approach the terminal end of the arc groove 22b. ing. Further, a protrusion 23 that is engaged with an arc-shaped notch 43a formed in the sleeve 4 when fitted into a sleeve 4 described later is formed on the edge opposite to the retaining collar 21. Thus, the coupling coupling 2 is not rotated with respect to the sleeve 2 in a state where the coupling coupling 2 is fitted in the sleeve 4.

  With this configuration, the engaging protrusion 31 of the connecting member 3 is inserted along the vertical groove 21a, and then rotated along the arc groove 21b, so that the engaging protrusion 31 is engaged with the engaging protrusion 21c. The engagement protrusion 31 is in a fixed state in a state where the connection member 3 has been overcome, and the connecting member 3 is not easily detached from the joint coupling 2. Further, when the connecting member 3 is removed from the joint coupling 2, it can be removed by rotating the engaging protrusion 31 over the engaging protrusion 21c by rotating it in a direction opposite to that described above with a strong force.

  In the connecting member 3 described above, the engagement protrusion 31 is formed at a position opposite to the cylindrical portion, and the opposite side from which the engagement protrusion 31 is formed is connected to the saliva discharge handpiece or the like via a collar 32. A connecting pipe portion 33 for connecting a hose (not shown) from the vacuum handpiece is formed. The connecting member 3 is configured to prevent water leakage between the connecting member 3 and the joint coupling 2 when the connecting member 3 is fitted in the joint coupling 2.

  Reference numeral 4 denotes a sleeve made of three cylindrical members made of polypropylene resin, and the size is formed to fit the above-described three joint couplings 2. It is elastically connected by. Each sleeve 4 includes a small-diameter portion 42 and a large-diameter portion 43, and a step portion 44 is formed between the small-diameter portion 42 and the large-diameter portion 43. A groove 42a is formed in the peripheral surface of the small diameter portion 42, and an arcuate cutout portion 43a into which the protruding piece 23 of the joint coupling 2 is fitted is formed in the opening of the large diameter portion 43. .

Next, a manufacturing method of the dental solid collector having the above-described configuration will be described.
First, the coupling couplings 2 having the respective sizes are inserted into the three sleeves 4. At this time, the protruding piece 23 of the coupling coupling 2 is engaged with and inserted into the arcuate cutout 43a of the sleeve 4. As a result, the coupling coupling 2 can be positioned and rotated with respect to the sleeve 4 and can be prevented from coming off.

  Next, positioning is performed by inserting up to the step portion 44 of the sleeve 4 in which the joint coupling 2 is inserted into a mold of the injection molding machine (the mold has a shape for forming the main body 1). Perform (line L shown in FIG. 2). In this state, since the sleeves 4 are connected by the connecting pieces 41, the directions of the sleeves 4 when installed in the mold do not vary.

  Then, when polypropylene resin is injected into the mold of the injection molding machine, the main body 1 is formed. At the time of injection, the connecting piece 41 of the sleeve 4 is formed by the polypropylene resin injected into the mold as shown in FIG. It is buried and injected up to the step 44 on the outer peripheral surface of the sleeve 4.

  In this way, by injecting the polypropylene resin into the mold, the sleeve 4 which is also molded from the polypropylene resin is melted and integrated in the mold, and there is a gap between the outer periphery of the joint coupling 2. No water leakage will occur.

  In addition, since the polypropylene resin enters the groove 42a formed in the small diameter portion 42 of the sleeve 4 at the time of injection molding, the joint coupling 2 exhibits an effect of preventing the main body 1 from coming off. Further, it is possible to realize integration with the main body 1 by absorbing the dimensional error at the time of injection molding, or whether the connecting piece 41 for connecting the sleeves 4 has elasticity.

  Further, since each sleeve 4 is provided with a step portion 44 and the injected polypropylene resin is blocked by the step portion 44, the injected polypropylene resin is placed in the engagement groove 22 formed in the joint coupling 2. Therefore, the engaging protrusion 31 of the connecting member 3 can be reliably guided and inserted into the engaging groove 22 and can be locked, and the joint pressure can be increased by the molding pressure when the polypropylene resin is injected. The coupling 2 and the sleeve 4 can be more closely attached to prevent water leakage.

  As described above, in the dental solid collector manufactured as described above, since the main body 1 is formed of a polypropylene resin having chemical resistance, it is not fouled by chemicals discharged during the treatment. In addition, since the coupling coupling 2 that is an engagement portion with the connection member 3 of the hose extended from the vacuum handpiece or the saliva discharge handpiece is composed of the polyacetal resin having wear resistance, Defects due to wear do not occur during detachment, and the joint coupling 2 and the main body 1 are covered with the sleeve 4 made of the same polypropylene resin as the outer main body 1, so that the fixed state with the main body 1 is achieved. Is ensured, and water leakage is also prevented.

  In the embodiment described above, the case where the main body and the sleeve are made of polypropylene resin having chemical resistance and the joint coupling is made of polyacetal resin having wear resistance has been described. However, as the resin constituting the main body and sleeve, The resin may be a resin having chemical resistance and less pollution, and the resin constituting the joint coupling may be a resin having wear resistance.

It is a perspective view of the dental solid collector which concerns on this invention. It is sectional drawing same as the above. It is a disassembled perspective view suitable for demonstrating a manufacturing method. It is a top view same as the above. It is a front view of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solid collector main body 13-15 Connection part 2 Joint coupling 22 Groove 22a Vertical groove 22b Circular groove 22c Engagement protrusion 3 Connection member 4 Sleeve 42a Groove 44 Step part

Claims (6)

Is formed of a resin having chemical resistance, and a solid collector body having a plurality of connecting portions is made form,
A coupling coupling formed of a wear-resistant resin;
The joint coupling is inserted , formed of the same resin as the solid collector body, and the same number of sleeves as a plurality of connection portions formed on the solid collector body ;
Consisting of
The joint coupling is detachable from a connection member connected to the hose tip from the surgical instrument, and is formed so as to be lockable.
The sleeve is formed with an opening for inserting the connection member,
The set the sleeve in a state in which fitted the sleeve joint coupling the injection mold, said by injection molding a solid collector body, formed by integrating the above and the solid collector body sleeve,
A dental solid collector characterized by that.   The joint coupling is formed with a vertical groove and an arcuate groove for guiding an engaging protrusion formed on the connecting member, and a protrusion for locking the engaging protrusion is formed in the arcuate groove. The dental solid collector according to claim 1. Forming a plurality of sleeves with a resin having chemical resistance;
Forming a coupling coupling to be inserted into the sleeve so as to be detachable and lockable with a connecting member connected to the tip of the hose from the surgical instrument ;
Setting the sleeve in a mold of an injection molding machine;
The step of injecting the same resin as the sleeve into the mold and forming a solid collector body by injection molding,
After the injection molding, the solid collector main body and the sleeve are melted and integrated so that the joint coupling is fixed in close contact with the solid collector main body.
A method for producing a dental solid collector characterized by the above. Before kissing Reeve connected by connecting pieces, the production method of dental solid collector according to claim 3, characterized in that it is melted integrated in the solid collector body during the injection molding of the solid collector body.   The sleeve has a stepped portion, and the resin having chemical resistance to be injected is set at the position of the outlet line of the resin injected when the sleeve is set in the mold. So that the joint coupling and the sleeve are more closely adhered to each other by the molding pressure during the injection of the chemical-resistant resin to prevent water leakage. 4. The method for producing a dental solid collector according to claim 3, wherein the dental solid collector is manufactured.   By forming a groove at a position where the sleeve enters the mold, resin enters the groove at the time of injection molding so that the joint coupling does not come out of the solid collector body. The method for producing a dental solid collector according to claim 3.

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