WO2016056440A1 - Resin slide bearing and cosmetic device - Google Patents

Resin slide bearing and cosmetic device Download PDF

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Publication number
WO2016056440A1
WO2016056440A1 PCT/JP2015/077686 JP2015077686W WO2016056440A1 WO 2016056440 A1 WO2016056440 A1 WO 2016056440A1 JP 2015077686 W JP2015077686 W JP 2015077686W WO 2016056440 A1 WO2016056440 A1 WO 2016056440A1
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WO
WIPO (PCT)
Prior art keywords
bearing
elastic piece
sliding bearing
resin
resin sliding
Prior art date
Application number
PCT/JP2015/077686
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French (fr)
Japanese (ja)
Inventor
阿部　浩久
福澤　覚
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Ntn株式会社
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Publication date
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Publication of WO2016056440A1 publication Critical patent/WO2016056440A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H15/00—Massage by means of rollers, balls, e.g. inflatable, chains, or roller chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D44/00—Other cosmetic or toiletry articles, e.g. for hairdressers' rooms
    • A45D44/22—Face shaping devices, e.g. chin straps; Wrinkle removers, e.g. stretching the skin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings

Definitions

  • the present invention relates to a sliding bearing, and more particularly to a resin sliding bearing manufactured by injection molding.
  • the present invention also relates to a cosmetic device using this sliding bearing.
  • a synthetic resin sliding bearing is widely used as a bearing that rotatably supports a rotating body on a support shaft.
  • Synthetic resin sliding bearings are often used in rotating parts with light loads and low rotational speeds because they are lighter in weight, simple in structure, less in number of parts, and less expensive than rolling bearings.
  • a synthetic resin sliding bearing is used, and a substantially spherical rotating body is rotatably held on a support shaft.
  • the bearing member used in the cosmetic device described in Patent Document 1 has a pair of elastically deformable locking claws projecting on the outer periphery, and the locking member holds the rotating body from the bearing member by the locking claws. .
  • such resin-made sliding bearings are manufactured by injection molding of synthetic resin, and the gate that is the entrance of the resin at the time of injection molding is arranged on the outer peripheral surface avoiding the inner diameter surface that is the bearing surface. It was.
  • the outer peripheral surface of such a sliding bearing may be covered with a rotating body, and even if the traces of the gate remain, the appearance will not be impaired. Therefore, considering the fluidity of the resin, the axial direction of the sliding bearing Side gates were arranged around the end face.
  • the gate cut is performed by a gate cut machine attached to the take-out machine when the molded body is taken out from the molding machine in the manufacturing process of injection molding, or manually by using a nipper or the like after the injection molding.
  • the present invention has been made in order to cope with such a problem, and in the case of improper assembly of a rotating body in a resin sliding bearing made of an injection molded body having a locking claw for fixing the rotating body. Even if you try to forcibly remove the rotating body, you can prevent the elastic deformation part that supports the locking claw from being damaged, and if necessary, omit the independent gate cutting process during injection molding
  • An object of the present invention is to provide a resin sliding bearing that can be manufactured and a cosmetic device using the same.
  • the resin sliding bearing of the present invention is a resin sliding bearing that rotatably supports a rotating body on a support shaft, and the resin sliding bearing is an injection molded body formed by injection molding a synthetic resin, and the support shaft is A substantially cylindrical bearing body that can be inserted, a locking claw for fixing the rotating body to the sliding bearing, the locking claw disposed on the outer peripheral side, and the locking claw being a cylinder of the bearing body And an elastic piece that can be elastically pushed inward.
  • the elastic piece has a gate mark formed by the injection molding and is formed integrally with the bearing body.
  • the locking claw is provided at an end of the elastic piece opposite to the length direction of the elastic piece with respect to a boundary portion of the elastic piece with the bearing body, and the gate mark is centered in the length direction of the elastic piece. It is located between a part and the outermost part of the said latching claw, It is characterized by the above-mentioned.
  • the gate mark is located on the inner peripheral side of the elastic piece.
  • the gate trace is a gate trace by a tunnel gate.
  • a plurality of the locking claws and the elastic pieces are formed at equal intervals on the circumference of the bearing body.
  • the inner peripheral surface of the elastic piece is in a non-contact state with the support shaft.
  • the rotating body is a sphere or a roller.
  • the cosmetic device of the present invention is a cosmetic device provided with a sphere or a roller at the distal end portion of the handle, and the sphere or the roller which is a rotating body is rotatable on a support shaft at the distal end portion of the handle via a bearing.
  • the bearing is the resin sliding bearing of the present invention.
  • the resin sliding bearing of the present invention is an injection molded body formed by injection molding a synthetic resin, and has a substantially cylindrical bearing body in which a support shaft can be inserted, and a latch for fixing the rotating body to the sliding bearing.
  • a claw and an elastic piece which is arranged on the outer peripheral side and which can be elastically pushed into the cylinder body of the bearing body, and the elastic piece has a gate mark by injection molding. Since it is formed integrally with the bearing body, the molten resin at the time of injection molding flows from the elastic piece to the bearing body, and in particular, the flow at the boundary between the bearing body and the elastic piece becomes smooth, and the boundary is mechanical Strength is improved. For this reason, even when the rotating body is mistakenly installed or when the rotating body is forcibly removed, the elastic piece supporting the locking claw is damaged from the base (boundary portion). Can be prevented.
  • the locking claw is provided at an end of the elastic piece opposite to the length direction with respect to the boundary portion of the elastic piece with the bearing body, and the gate mark is locked from the center in the length direction of the elastic piece. Since it is located between the ends of the claws, the flow of the molten resin becomes smoother and the mechanical strength between the bearing body and the elastic piece (boundary portion) is further improved.
  • the gate mark is located on the inner peripheral side of the elastic piece, the gate mark can be hidden from the surface of the resin sliding bearing, which is excellent in appearance. Further, in this case, since the gate mark is a gate mark by a tunnel gate, the gate can be cut when the molded product protrudes in the injection molding process.
  • the resin sliding bearing of the present invention has the effects as described above, it can be suitably used as a bearing for a cosmetic device in which the rotating body is a sphere or a roller.
  • the cosmetic device of the present invention includes a sphere or roller at the tip of the handle, and the sphere or roller as a rotating body is rotatably supported on the support shaft at the tip of the handle via the resin sliding bearing of the present invention. Therefore, it is possible to prevent damage to the fixed portion (elastic piece) due to assembly or removal of the rotating body.
  • FIG. 1 It is a perspective view which shows an example of the resin sliding bearing of this invention. It is the front view and sectional drawing of a resin slide bearing shown in FIG. It is the schematic which shows the rotary body support part of the cosmetics device of this invention.
  • the resin sliding bearing according to the present invention is capable of elastically pushing the locking claw into the cylindrical inner side of the bearing main body, the locking claw for fixing the rotating body, and the locking claw.
  • the elastic piece is integrally formed as a part of the bearing body, and the elastic piece has a gate mark by injection molding. That is, the gate at the time of injection molding is provided at the portion of the elastic piece.
  • the molten resin at the time of injection molding flows from the elastic piece to the bearing body. Since the volume of the bearing body is larger than the volume of the elastic piece, the molten resin does not flow back into the elastic piece even if the volume of the bearing body is filled with the molten resin. Therefore, the flow of the molten resin between the bearing body and the elastic piece (boundary part) becomes smooth, the mechanical strength at the boundary part is improved, and the elastic piece is prevented from being damaged from the root (boundary part). it can.
  • FIG. 1 is a perspective view showing an example of the resin sliding bearing of the present invention
  • FIG. 2 is a front view (upper view) and a sectional view (lower view) of the resin sliding bearing.
  • the resin sliding bearing 1 of the present invention includes a substantially cylindrical bearing body 2 into which a support shaft provided in a cosmetic device or the like can be inserted, and a rotating body such as a roller of the cosmetic device.
  • the latching claw 3 for fixing to the outer side, and the elastic piece 4 which can arrange
  • the resin sliding bearing 1 is an injection molded body of synthetic resin, and each part of the bearing main body 2, the locking claw 3, and the elastic piece 4 is integrally formed by injection molding.
  • an injection molded body in which at least the elastic piece 4 and the bearing body 2 are integrally molded may be used.
  • the locking claw 3 may be integrally molded including this as in the present embodiment. It may be formed as a body and bonded to the elastic piece 4.
  • the bearing body 2 is substantially cylindrical, and has a flange 2a at one end and a through hole 2b through which the support shaft passes at the other end.
  • the shape other than the elastic piece 4 and the locking claw 3 can be appropriately changed according to the shape of the support shaft and the rotating body that are the counterpart material.
  • the elastic piece 4 has a gate mark 5 formed by injection molding.
  • the bearing body 2 does not have a gate mark.
  • the molten resin at the time of injection molding flows from the elastic piece 4 to the bearing body 2, and therefore, when the gate is provided on the bearing body 2 side and injection molding is performed (when the bearing body 2 has a gate mark).
  • the flow becomes smooth, and the mechanical strength of the boundary portion 6 between the bearing body 2 and the elastic piece 4 can be improved.
  • the shape of the elastic piece 4 is such that one part of the cylindrical outer wall of the bearing body 2 is a boundary 6 with the bearing body 2 around the portion that becomes the elastic piece 4. It is made into the shape cut out into the slit shape leaving only.
  • the elastic piece 4 is a long piece along the cylindrical axis direction of the bearing body 2.
  • the locking claw 3 is provided on the outer peripheral side of the elastic piece 4 at the end opposite to the boundary portion 6 in the length direction.
  • the shape of the elastic piece 4 is not limited to that shown in these drawings, and may be any shape that can elastically push the locking claw 3 disposed on the outer periphery toward the inside of the cylinder of the bearing body 2.
  • the length of the elastic piece 4 in the longitudinal direction, the position of the boundary portion 6 and the like can be set as appropriate.
  • the number of the fixing parts composed of the elastic pieces 4 and the locking claws 3 may be at least one, and preferably 2 to 4. By providing two to four, it is possible to improve the fixing force with the rotating body while maintaining the required mechanical strength of the bearing body. Moreover, when providing two or more, it is preferable to provide at equal intervals on the periphery of a bearing main body. By providing at equal intervals, the fixing force with the rotating body is stabilized. In the case of providing a plurality, it is preferable to provide gates on all the elastic pieces in consideration of the flow state of the molten resin at the time of the injection molding described above.
  • the inner peripheral surface of the elastic piece 4 is preferably in a non-contact state with respect to the support shaft.
  • the inner peripheral surface 3b of the elastic piece 4 is on the outer diameter side with respect to the inner peripheral surface 2c of the bearing body 2 in contact with the support shaft, and does not contact the support shaft.
  • the support shaft is supported by the inner peripheral surface 2 c of the bearing body 2 and is not supported by the inner peripheral surface 3 b of the elastic piece 4. For this reason, unstable sliding resistance is not added.
  • the gate mark 5 is located on the inner peripheral side of the elastic piece 4. That is, the gate is provided at a portion that becomes the inner peripheral surface of the elastic piece 4 at the time of injection molding. Since the gate mark 5 is located on the inner peripheral side of the elastic piece 4, the gate mark 5 can be hidden from the outer surface of the sliding bearing, and the appearance is excellent. Further, by providing a gate at a portion that becomes the inner peripheral surface of the elastic piece 4 at the time of injection molding and using the gate as a tunnel gate, the gate can be cut when the molded product protrudes in the injection molding process. Thereby, the independent gate cut process by the manual work after injection molding etc. can be omitted.
  • the position of the gate mark 5 in the cylindrical axis direction is not particularly limited, but as shown in FIG. It is preferable to do.
  • the length of the elastic piece 4 in the longitudinal direction (axial direction) is L
  • the length from the center C to the outermost end 3a of the locking claw 3 is L / 2.
  • the synthetic resin used for the resin sliding bearing of the present invention is not particularly limited as long as it can be injection molded and has sliding characteristics as a sliding bearing material.
  • polyacetal (POM) resin polyphenylene sulfide (PPS) resin, polyamide (PA) resin, polyamideimide (PAI) resin, polytetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA) resin, tetrafluoroethylene / hexa Fluoropropylene copolymer (FEP) resin, injection-moldable fluororesin such as ethylene-tetrafluoroethylene copolymer (ETFE) resin, polyetheretherketone (PEEK) resin, injection-moldable polyimide (PI) resin, etc.
  • POM polyacetal
  • PA polyphenylene sulfide
  • PAI polyamideimide
  • PFA polytetrafluoroethylene / perfluoroalkyl vinyl ether copolymer
  • These synthetic resins may be blended with a solid lubricant such as polytetrafluoroethylene (PTFE) resin to improve sliding properties, or may be an oil-containing resin blended with lubricating oil. Moreover, you may provide electroconductivity by mix
  • PTFE polytetrafluoroethylene
  • a synthetic resin melted from a gate such as a tunnel gate provided in a portion serving as an elastic piece is injected into a mold having a cavity of the shape of the resin sliding bearing having the above configuration.
  • a step of filling, a step of cooling and solidifying the injection-filled synthetic resin, a step of opening the mold, and a step of releasing the molded body from the mold with a protruding pin is characteristic.
  • FIG. 3 is an example of a cosmetic device according to the present invention, and is a schematic view showing a rotating body supporting portion thereof.
  • the cosmetic device 11 includes a sphere 13 that is a rotating body at the distal end portion of the handle 12.
  • the spherical body 13 is rotatably supported on the support shaft 14 at the distal end portion of the handle 12 via the resin sliding bearing 1 of the present invention.
  • the locking claw 3 is engaged with a groove inside the sphere 13 through elastic deformation of the elastic piece 4 toward the inside of the cylinder.
  • the spherical body 13 and the resin sliding bearing 1 are fixed. Further, the support shaft 14 is inserted into the inner periphery of the bearing body 2 and is prevented from coming off by a retaining ring or the like at the end of the through hole 2b. As a result, the support shaft 14 is supported by the resin sliding bearing 1. With these configurations, the resin sliding bearing 1 supports the sphere 13 fixed to the bearing so as to be rotatable with respect to the support shaft 14.
  • the shape of the rotating body is not particularly limited, and a cylindrical or prismatic roller or the like can be adopted in addition to the spherical body 13 shown in FIG.
  • This type of beauty device is used while rotating or rotating a sphere or roller against the skin for the purpose of enhancing or maintaining the skin to the skin such as the face and limbs, or for the purpose of massage effect.
  • the resin sliding bearing of the present invention can prevent the elastic deformation part supporting the locking claw for fixing the rotating body from being damaged, and can be manufactured by omitting an independent gate cutting process at the time of injection molding as necessary. Therefore, in a cosmetic device having a sphere or a roller at the tip of the handle, it can be suitably used as a bearing for supporting the sphere or roller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Pain & Pain Management (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Sliding-Contact Bearings (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Provided is a resin slide bearing obtained from an injection molding with locking tabs for fixing a rotating body, the resin slide bearing being capable of preventing breakage of the elastic deforming parts supporting said locking tabs and of being manufactured omitting an independent gate-cutting step during injection molding when necessary. The resin slide bearing (1), which is obtained by injection molding a synthetic resin, comprises: a roughly cylindrical bearing body (2) into which a support shaft can be fitted; locking tabs (3) for fixing the rotating body to the slide bearing; and elastic pieces (4), which are for disposing the locking tabs (3) on the circumference and allow the locking tabs (3) to be elastically pushed towards the inside of the cylinder of the bearing body (2). The elastic pieces (4) have a gate mark (5) resulting from the injection molding and are integrally formed with the bearing body (2).

Description

樹脂滑り軸受および美容器Resin sliding bearing and beauty device
　本発明は滑り軸受に関し、特に射出成形で製造される樹脂製の滑り軸受に関する。また、この滑り軸受を用いた美容器に関する。 The present invention relates to a sliding bearing, and more particularly to a resin sliding bearing manufactured by injection molding. The present invention also relates to a cosmetic device using this sliding bearing.
　回転体を支持軸に回転可能に支持する軸受として、合成樹脂製の滑り軸受が広く一般に用いられている。合成樹脂製の滑り軸受は、転がり軸受と比較して、軽量であり構造が単純で部品点数が少なく安価であるため、軽荷重、低回転数の回転部に用いられることが多い。例えば、特許文献１に記載の美容器においても合成樹脂製の滑り軸受が用いられており、ほぼ球体状の回転体を支持軸に回転可能に保持している。特許文献１に記載の美容器に用いられる軸受け部材は、外周に一対の弾性変形可能な係止爪が突設されており、この係止爪によって回転体を軸受け部材から抜け止め保持している。 A synthetic resin sliding bearing is widely used as a bearing that rotatably supports a rotating body on a support shaft. Synthetic resin sliding bearings are often used in rotating parts with light loads and low rotational speeds because they are lighter in weight, simple in structure, less in number of parts, and less expensive than rolling bearings. For example, in the cosmetic device described in Patent Document 1, a synthetic resin sliding bearing is used, and a substantially spherical rotating body is rotatably held on a support shaft. The bearing member used in the cosmetic device described in Patent Document 1 has a pair of elastically deformable locking claws projecting on the outer periphery, and the locking member holds the rotating body from the bearing member by the locking claws. .
　従来、このような樹脂製の滑り軸受は、合成樹脂の射出成形によって製造されており、射出成形時の樹脂の入り口であるゲートは、軸受面である内径面を避けて外周面に配置されていた。このような滑り軸受の外周面は回転体で覆われるということもあり、ゲートの痕が残っていても外観を損ねるということが無いため、樹脂の流動性を考慮し、滑り軸受の軸方向の端面周辺にサイドゲートなどを配置していた。ゲートカットは射出成形の製造工程の中で成形機から成形体を取り出す際に取り出し機に付帯されたゲートカット機によって、あるいは、射出成形後にニッパなどを用いて手作業によって行われていた。 Conventionally, such resin-made sliding bearings are manufactured by injection molding of synthetic resin, and the gate that is the entrance of the resin at the time of injection molding is arranged on the outer peripheral surface avoiding the inner diameter surface that is the bearing surface. It was. The outer peripheral surface of such a sliding bearing may be covered with a rotating body, and even if the traces of the gate remain, the appearance will not be impaired. Therefore, considering the fluidity of the resin, the axial direction of the sliding bearing Side gates were arranged around the end face. The gate cut is performed by a gate cut machine attached to the take-out machine when the molded body is taken out from the molding machine in the manufacturing process of injection molding, or manually by using a nipper or the like after the injection molding.
特開２０１３－１０３０８５号公報JP 2013-103085 A
　しかしながら、特許文献１に記載された軸受け部材において、弾性変形可能な係止爪の軸受本体との連結部の機械的強度が不十分であり、回転体の組み込み時や取り外し時に弾性変形部が破損するおそれがある。このような破損は、通常の組み込み時には発生することはないが、誤った組み込みを行なった場合や無理に回転体を取り外そうとした場合に発生するおそれがある。 However, in the bearing member described in Patent Document 1, the mechanical strength of the connecting portion of the elastically deformable locking claw with the bearing body is insufficient, and the elastically deforming portion is damaged when the rotating body is incorporated or removed. There is a risk. Such damage does not occur during normal installation, but may occur when incorrect installation is performed or when the rotating body is forcibly removed.
　本発明はこのような問題に対処するためになされたものであり、回転体を固定するための係止爪を有する射出成形体からなる樹脂滑り軸受において、回転体の誤った組み込みを行なった場合や、無理に回転体を取り外そうとした場合であっても係止爪を支える弾性変形部が破損することを防止でき、必要に応じて射出成形時の独立したゲートカット工程を省略して製造できる樹脂滑り軸受およびこれを用いた美容器を提供することを目的とする。 The present invention has been made in order to cope with such a problem, and in the case of improper assembly of a rotating body in a resin sliding bearing made of an injection molded body having a locking claw for fixing the rotating body. Even if you try to forcibly remove the rotating body, you can prevent the elastic deformation part that supports the locking claw from being damaged, and if necessary, omit the independent gate cutting process during injection molding An object of the present invention is to provide a resin sliding bearing that can be manufactured and a cosmetic device using the same.
　本発明の樹脂滑り軸受は、回転体を支持軸に回転可能に支持する樹脂滑り軸受であって、該樹脂滑り軸受は、合成樹脂を射出成形してなる射出成形体であり、上記支持軸を嵌挿可能な略円筒状の軸受本体と、上記回転体を該滑り軸受に固定するための係止爪と、該係止爪を外周側に配置するとともに上記係止爪を上記軸受本体の円筒内側方向に弾性的に押し込み可能な弾性片とを有し、上記弾性片は、上記射出成形によるゲート痕を有し、上記軸受本体と一体に形成されていることを特徴とする。 The resin sliding bearing of the present invention is a resin sliding bearing that rotatably supports a rotating body on a support shaft, and the resin sliding bearing is an injection molded body formed by injection molding a synthetic resin, and the support shaft is A substantially cylindrical bearing body that can be inserted, a locking claw for fixing the rotating body to the sliding bearing, the locking claw disposed on the outer peripheral side, and the locking claw being a cylinder of the bearing body And an elastic piece that can be elastically pushed inward. The elastic piece has a gate mark formed by the injection molding and is formed integrally with the bearing body.
　上記係止爪は、上記弾性片の上記軸受本体との境界部に対して該弾性片の長さ方向反対側の端部に設けられ、上記ゲート痕は、上記弾性片の長さ方向で中央部から上記係止爪の最端部までの間に位置することを特徴とする。 The locking claw is provided at an end of the elastic piece opposite to the length direction of the elastic piece with respect to a boundary portion of the elastic piece with the bearing body, and the gate mark is centered in the length direction of the elastic piece. It is located between a part and the outermost part of the said latching claw, It is characterized by the above-mentioned.
　上記ゲート痕は、上記弾性片の内周側に位置することを特徴とする。また、この場合において、上記ゲート痕は、トンネルゲートによるゲート痕であることを特徴とする。 The gate mark is located on the inner peripheral side of the elastic piece. In this case, the gate trace is a gate trace by a tunnel gate.
　上記係止爪および上記弾性片は、上記軸受本体の円周上に等間隔で複数個形成されていることを特徴とする。 A plurality of the locking claws and the elastic pieces are formed at equal intervals on the circumference of the bearing body.
　上記弾性片の内周面は、上記支持軸に非接触状態であることを特徴とする。 The inner peripheral surface of the elastic piece is in a non-contact state with the support shaft.
　上記回転体が、球体またはローラであることを特徴とする。 The rotating body is a sphere or a roller.
　本発明の美容器は、ハンドルの先端部に球体またはローラを備えた美容器であって、回転体である上記球体または上記ローラが、上記ハンドルの先端部の支持軸に軸受を介して回転可能に支持されており、この軸受が上記本発明の樹脂滑り軸受であることを特徴とする。 The cosmetic device of the present invention is a cosmetic device provided with a sphere or a roller at the distal end portion of the handle, and the sphere or the roller which is a rotating body is rotatable on a support shaft at the distal end portion of the handle via a bearing. The bearing is the resin sliding bearing of the present invention.
　本発明の樹脂滑り軸受は、合成樹脂を射出成形してなる射出成形体であり、支持軸を嵌挿可能な略円筒状の軸受本体と、回転体を該滑り軸受に固定するための係止爪と、該係止爪を外周側に配置するとともに係止爪を軸受本体の円筒内側方向に弾性的に押し込み可能な弾性片とを有し、弾性片が射出成形によるゲート痕を有して軸受本体と一体に形成されているので、射出成形時の溶融樹脂が弾性片から軸受本体に流動し、特に軸受本体と弾性片との境界部での流動がスムーズになり該境界部の機械的強度が向上する。このため、回転体の誤った組み込みを行なった場合や、無理に回転体を取り外そうとした場合であっても、係止爪を支える弾性片がその根元（境界部）から破損することを防止できる。 The resin sliding bearing of the present invention is an injection molded body formed by injection molding a synthetic resin, and has a substantially cylindrical bearing body in which a support shaft can be inserted, and a latch for fixing the rotating body to the sliding bearing. A claw and an elastic piece which is arranged on the outer peripheral side and which can be elastically pushed into the cylinder body of the bearing body, and the elastic piece has a gate mark by injection molding. Since it is formed integrally with the bearing body, the molten resin at the time of injection molding flows from the elastic piece to the bearing body, and in particular, the flow at the boundary between the bearing body and the elastic piece becomes smooth, and the boundary is mechanical Strength is improved. For this reason, even when the rotating body is mistakenly installed or when the rotating body is forcibly removed, the elastic piece supporting the locking claw is damaged from the base (boundary portion). Can be prevented.
　上記係止爪が、弾性片の軸受本体との境界部に対して該弾性片の長さ方向反対側の端部に設けられ、ゲート痕が、弾性片の長さ方向で中央部から係止爪の最端部までの間に位置するので、溶融樹脂の流動がよりスムーズになり、軸受本体と弾性片との間（境界部）の機械的強度がさらに向上する。 The locking claw is provided at an end of the elastic piece opposite to the length direction with respect to the boundary portion of the elastic piece with the bearing body, and the gate mark is locked from the center in the length direction of the elastic piece. Since it is located between the ends of the claws, the flow of the molten resin becomes smoother and the mechanical strength between the bearing body and the elastic piece (boundary portion) is further improved.
　上記ゲート痕が、弾性片の内周側に位置するので、樹脂滑り軸受の表面からゲート痕を隠すことができ、外観上優れる。また、この場合において、ゲート痕がトンネルゲートによるゲート痕であるので、射出成形工程の成形品突出し時においてゲートカットが可能となる。 Since the gate mark is located on the inner peripheral side of the elastic piece, the gate mark can be hidden from the surface of the resin sliding bearing, which is excellent in appearance. Further, in this case, since the gate mark is a gate mark by a tunnel gate, the gate can be cut when the molded product protrudes in the injection molding process.
　上記係止爪および弾性片が、軸受本体の円周上に等間隔で複数個形成されているので、回転体の固定力が向上するとともに安定する。 Since a plurality of the locking claws and elastic pieces are formed at equal intervals on the circumference of the bearing body, the fixing force of the rotating body is improved and stabilized.
　上記弾性片の内周面が、支持軸に非接触状態であるので、使用時において余分な摺動抵抗が付加されることがない。 Since the inner peripheral surface of the elastic piece is not in contact with the support shaft, no extra sliding resistance is added during use.
　本発明の樹脂滑り軸受は上記のような効果を有するので、回転体が球体またはローラである美容器などの軸受として好適に利用できる。 Since the resin sliding bearing of the present invention has the effects as described above, it can be suitably used as a bearing for a cosmetic device in which the rotating body is a sphere or a roller.
　本発明の美容器は、ハンドルの先端部に球体またはローラを備え、回転体である球体またはローラが、ハンドルの先端部の支持軸に本発明の樹脂滑り軸受を介して回転可能に支持されているので、回転体の組み付けや取り外しによる固定部（弾性片）の破損を防止できる。 The cosmetic device of the present invention includes a sphere or roller at the tip of the handle, and the sphere or roller as a rotating body is rotatably supported on the support shaft at the tip of the handle via the resin sliding bearing of the present invention. Therefore, it is possible to prevent damage to the fixed portion (elastic piece) due to assembly or removal of the rotating body.
本発明の樹脂滑り軸受の一例を示す斜視図である。It is a perspective view which shows an example of the resin sliding bearing of this invention. 図１に示す樹脂滑り軸受の正面図および断面図である。It is the front view and sectional drawing of a resin slide bearing shown in FIG. 本発明の美容器の回転体支持部分を示す概略図である。It is the schematic which shows the rotary body support part of the cosmetics device of this invention.
　本発明と同様形状の滑り軸受において、従来のように軸受本体にゲートを設けた場合、溶融樹脂は弾性片を通じ係止爪を充填しさらに軸受本体のキャビティ内の空隙に逆流するため、軸受本体と弾性片との間（境界部）で樹脂の流動が混ぜ合わさり、この部分においてランダムな流動が生じる。その結果、該境界部の機械的強度が低下することが判明した。 In the case of a sliding bearing having the same shape as the present invention, when a gate is provided on the bearing body as in the prior art, the molten resin fills the locking claw through the elastic piece and further flows back into the gap in the cavity of the bearing body. The flow of the resin is mixed between the elastic piece and the elastic piece (boundary portion), and a random flow is generated in this portion. As a result, it was found that the mechanical strength of the boundary portion was lowered.
　このような知見に基づき、本発明の樹脂滑り軸受は、略円筒状の軸受本体と、回転体を固定する係止爪と、この係止爪を軸受本体の円筒内側方向に弾性的に押し込み可能な弾性片とを有する構成において、弾性片が軸受本体の一部として一体に形成され、この弾性片に射出成形によるゲート痕を有することを特徴としている。すなわち、射出成形時におけるゲートを弾性片の部位に設けている。これにより、射出成形時の溶融樹脂が弾性片から軸受本体に流動する。軸受本体の容積は弾性片の容積よりも大きいため、軸受本体の容積に溶融樹脂が充填されても弾性片に溶融樹脂が逆流することがない。そのため、軸受本体と弾性片との間（境界部）の溶融樹脂の流動がスムーズになり、該境界部での機械的強度が向上し、弾性片が根元（境界部）から破損することを防止できる。 Based on such knowledge, the resin sliding bearing according to the present invention is capable of elastically pushing the locking claw into the cylindrical inner side of the bearing main body, the locking claw for fixing the rotating body, and the locking claw. The elastic piece is integrally formed as a part of the bearing body, and the elastic piece has a gate mark by injection molding. That is, the gate at the time of injection molding is provided at the portion of the elastic piece. Thereby, the molten resin at the time of injection molding flows from the elastic piece to the bearing body. Since the volume of the bearing body is larger than the volume of the elastic piece, the molten resin does not flow back into the elastic piece even if the volume of the bearing body is filled with the molten resin. Therefore, the flow of the molten resin between the bearing body and the elastic piece (boundary part) becomes smooth, the mechanical strength at the boundary part is improved, and the elastic piece is prevented from being damaged from the root (boundary part). it can.
　本発明の樹脂滑り軸受を図１および図２に基づいて説明する。図１は本発明の樹脂滑り軸受の一例を示す斜視図であり、図２はこの樹脂滑り軸受の正面図（上図）および断面図（下図）である。図１に示すように、本発明の樹脂滑り軸受１は、美容器などに設けられる支持軸を嵌挿可能な略円筒状の軸受本体２と、美容器のローラなどの回転体を該滑り軸受の外側に固定するための係止爪３と、係止爪３を外周側に配置するとともに係止爪３を軸受本体２の円筒内側方向に弾性的に押し込み可能な弾性片４とを有する。樹脂滑り軸受１は、合成樹脂の射出成形体であり、軸受本体２、係止爪３、および弾性片４の各部位は射出成形で一体に成形されている。なお、本発明では少なくとも弾性片４と軸受本体２とが一体に成形された射出成形体であればよく、係止爪３については、本形態のようにこれも含めて一体成形する他、別体として形成し弾性片４に接合させてもよい。 The resin sliding bearing of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing an example of the resin sliding bearing of the present invention, and FIG. 2 is a front view (upper view) and a sectional view (lower view) of the resin sliding bearing. As shown in FIG. 1, the resin sliding bearing 1 of the present invention includes a substantially cylindrical bearing body 2 into which a support shaft provided in a cosmetic device or the like can be inserted, and a rotating body such as a roller of the cosmetic device. The latching claw 3 for fixing to the outer side, and the elastic piece 4 which can arrange | position the latching claw 3 to the outer peripheral side and can be elastically pushed into the cylinder inner side direction of the bearing main body 2 are provided. The resin sliding bearing 1 is an injection molded body of synthetic resin, and each part of the bearing main body 2, the locking claw 3, and the elastic piece 4 is integrally formed by injection molding. In the present invention, an injection molded body in which at least the elastic piece 4 and the bearing body 2 are integrally molded may be used. The locking claw 3 may be integrally molded including this as in the present embodiment. It may be formed as a body and bonded to the elastic piece 4.
　軸受本体２は、略円筒状であり、一端に鍔部２ａを、他端に支持軸が貫通する貫通孔２ｂを有する。軸受本体２において、弾性片４および係止爪３の部分以外の形状については、相手材となる支持軸および回転体の形状に合わせて適宜変更できる。 The bearing body 2 is substantially cylindrical, and has a flange 2a at one end and a through hole 2b through which the support shaft passes at the other end. In the bearing body 2, the shape other than the elastic piece 4 and the locking claw 3 can be appropriately changed according to the shape of the support shaft and the rotating body that are the counterpart material.
　図２に示すように、弾性片４は、射出成形によるゲート痕５を有している。また、軸受本体２は、ゲート痕を有さない。これにより、上述のとおり、射出成形時の溶融樹脂が弾性片４から軸受本体２に流動するため、軸受本体２側にゲートを設けて射出成形する場合（軸受本体２にゲート痕がある場合）と比較して、その流動がスムーズになり、軸受本体２と弾性片４との境界部６の機械的強度を向上できる。 As shown in FIG. 2, the elastic piece 4 has a gate mark 5 formed by injection molding. The bearing body 2 does not have a gate mark. Thereby, as described above, the molten resin at the time of injection molding flows from the elastic piece 4 to the bearing body 2, and therefore, when the gate is provided on the bearing body 2 side and injection molding is performed (when the bearing body 2 has a gate mark). As compared with the above, the flow becomes smooth, and the mechanical strength of the boundary portion 6 between the bearing body 2 and the elastic piece 4 can be improved.
　図１および図２に示す形態では、弾性片４の形状は、軸受本体２の円筒外壁の一部について、弾性片４となる部位の周囲を、軸受本体２との境界部６となる一端部のみを残してスリット状に切り抜いた形状としている。弾性片４は、軸受本体２の円筒軸方向に沿った長尺状の片である。係止爪３は、この弾性片４の外周側で、境界部６に対して長さ方向反対側の端部に設けられている。なお、弾性片４の形状は、これらの図に示すものに限定されず、外周に配置する係止爪３を軸受本体２の円筒内側方向に弾性的に押し込み可能な形状であればよい。弾性片４の長手方向の長さ、境界部６の位置などについては、適宜設定できる。 In the form shown in FIG. 1 and FIG. 2, the shape of the elastic piece 4 is such that one part of the cylindrical outer wall of the bearing body 2 is a boundary 6 with the bearing body 2 around the portion that becomes the elastic piece 4. It is made into the shape cut out into the slit shape leaving only. The elastic piece 4 is a long piece along the cylindrical axis direction of the bearing body 2. The locking claw 3 is provided on the outer peripheral side of the elastic piece 4 at the end opposite to the boundary portion 6 in the length direction. The shape of the elastic piece 4 is not limited to that shown in these drawings, and may be any shape that can elastically push the locking claw 3 disposed on the outer periphery toward the inside of the cylinder of the bearing body 2. The length of the elastic piece 4 in the longitudinal direction, the position of the boundary portion 6 and the like can be set as appropriate.
　弾性片４と係止爪３とからなる固定部の個数は、少なくとも１個以上であればよく、２～４個であることが好ましい。２～４個設けることで、必要となる軸受本体の機械的強度を維持しながら、回転体との固定力を向上できる。また、複数個設ける場合には、軸受本体の円周上に等間隔に設けることが好ましい。等間隔に設けることで、回転体との固定力が安定する。複数個設ける場合、上述の射出成形時の溶融樹脂の流動状態を考慮すれば、すべての弾性片にゲートを設けることが好ましい。 The number of the fixing parts composed of the elastic pieces 4 and the locking claws 3 may be at least one, and preferably 2 to 4. By providing two to four, it is possible to improve the fixing force with the rotating body while maintaining the required mechanical strength of the bearing body. Moreover, when providing two or more, it is preferable to provide at equal intervals on the periphery of a bearing main body. By providing at equal intervals, the fixing force with the rotating body is stabilized. In the case of providing a plurality, it is preferable to provide gates on all the elastic pieces in consideration of the flow state of the molten resin at the time of the injection molding described above.
　軸受組み付け後の使用時において、弾性片４の内周面は、支持軸に対して非接触状態にすることが好ましい。図２の形態では、弾性片４の内周面３ｂが、支持軸と接触する軸受本体２の内周面２ｃよりも外径側であり、支持軸には接触しない。支持軸は軸受本体２の内周面２ｃで支持し、弾性片４の内周面３ｂでは支持しない。このため、不安定な摺動抵抗が付加されることがない。 In use after assembly of the bearing, the inner peripheral surface of the elastic piece 4 is preferably in a non-contact state with respect to the support shaft. In the form of FIG. 2, the inner peripheral surface 3b of the elastic piece 4 is on the outer diameter side with respect to the inner peripheral surface 2c of the bearing body 2 in contact with the support shaft, and does not contact the support shaft. The support shaft is supported by the inner peripheral surface 2 c of the bearing body 2 and is not supported by the inner peripheral surface 3 b of the elastic piece 4. For this reason, unstable sliding resistance is not added.
　図１および図２に示す形態では、ゲート痕５は、弾性片４の内周側に位置している。すなわち、射出成形時においてゲートを弾性片４の内周面となる部位に設けている。ゲート痕５が弾性片４の内周側に位置することで、滑り軸受の外表面からゲート痕５を隠すことができ、外観上優れるようになる。また、射出成形時においてゲートを弾性片４の内周面となる部位に設けて、該ゲートをトンネルゲートとすることにより、射出成形工程の成形品突出し時においてゲートカットが可能となる。これにより、射出成形後の手作業などによる独立したゲートカット工程を省略できる。 1 and 2, the gate mark 5 is located on the inner peripheral side of the elastic piece 4. That is, the gate is provided at a portion that becomes the inner peripheral surface of the elastic piece 4 at the time of injection molding. Since the gate mark 5 is located on the inner peripheral side of the elastic piece 4, the gate mark 5 can be hidden from the outer surface of the sliding bearing, and the appearance is excellent. Further, by providing a gate at a portion that becomes the inner peripheral surface of the elastic piece 4 at the time of injection molding and using the gate as a tunnel gate, the gate can be cut when the molded product protrudes in the injection molding process. Thereby, the independent gate cut process by the manual work after injection molding etc. can be omitted.
　また、ゲート痕５の円筒軸方向の位置は特に限定されないが、図２に示すように、弾性片４の長さ方向の中央部Ｃから係止爪３の最端部３ａまでの間に位置することが好ましい。図２において、弾性片４の長手方向（軸方向）長さをＬとすると、中央部Ｃから係止爪３の最端部３ａまでの長さがＬ／２となる。射出成形時のゲートを、弾性片４における係止爪３の最端部３ａ側に設けることで、境界部６側に設ける場合よりも、境界部６における溶融樹脂の流動がよりスムーズになり、境界部６の機械的強度をより向上できる。 Further, the position of the gate mark 5 in the cylindrical axis direction is not particularly limited, but as shown in FIG. It is preferable to do. In FIG. 2, if the length of the elastic piece 4 in the longitudinal direction (axial direction) is L, the length from the center C to the outermost end 3a of the locking claw 3 is L / 2. By providing the gate at the time of injection molding on the outermost end portion 3a side of the locking claw 3 in the elastic piece 4, the flow of the molten resin at the boundary portion 6 becomes smoother than when provided on the boundary portion 6 side, The mechanical strength of the boundary portion 6 can be further improved.
　本発明の樹脂滑り軸受に用いる合成樹脂としては、射出成形可能であり、滑り軸受材としての摺動特性を有するものであれば特に限定されず使用できる。例えば、ポリアセタール（ＰＯＭ）樹脂、ポリフェニレンスルフィド（ＰＰＳ）樹脂、ポリアミド（ＰＡ）樹脂、ポリアミドイミド（ＰＡＩ）樹脂、ポリテトラフルオロエチレン・パーフルオロアルキルビニルエーテル共重合体（ＰＦＡ）樹脂、テトラフルオロエチレン・ヘキサフルオロプロピレン共重合体（ＦＥＰ）樹脂、エチレン－テトラフルオロエチレン共重合体（ＥＴＦＥ）樹脂などの射出成形可能なフッ素樹脂、ポリエーテルエーテルケトン（ＰＥＥＫ）樹脂、射出成形可能なポリイミド（ＰＩ）樹脂などが挙げられる。これらの各合成樹脂は単独で使用してもよく、２種類以上混合したポリマーアロイであってもよい。 The synthetic resin used for the resin sliding bearing of the present invention is not particularly limited as long as it can be injection molded and has sliding characteristics as a sliding bearing material. For example, polyacetal (POM) resin, polyphenylene sulfide (PPS) resin, polyamide (PA) resin, polyamideimide (PAI) resin, polytetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA) resin, tetrafluoroethylene / hexa Fluoropropylene copolymer (FEP) resin, injection-moldable fluororesin such as ethylene-tetrafluoroethylene copolymer (ETFE) resin, polyetheretherketone (PEEK) resin, injection-moldable polyimide (PI) resin, etc. Is mentioned. Each of these synthetic resins may be used alone or may be a polymer alloy in which two or more kinds are mixed.
　これらの合成樹脂は、摺動特性を高めるために、ポリテトラフルオロエチレン（ＰＴＦＥ）樹脂などの固体潤滑剤を配合してもよく、潤滑オイルを配合した含油樹脂としてもよい。また、カーボンブラックなどの導電剤を配合して導電性を付与してもよい。さらに、酸化鉄やカーボンブラックなどの無機充填剤を配合して硬度を高くしてもよい。 These synthetic resins may be blended with a solid lubricant such as polytetrafluoroethylene (PTFE) resin to improve sliding properties, or may be an oil-containing resin blended with lubricating oil. Moreover, you may provide electroconductivity by mix | blending electrically conductive agents, such as carbon black. Furthermore, an inorganic filler such as iron oxide or carbon black may be blended to increase the hardness.
　本発明の樹脂滑り軸受を得るための製造方法は、上記構成の樹脂滑り軸受の形状のキャビティを有する金型に、弾性片となる部位に設けたトンネルゲートなどのゲートから溶融した合成樹脂を射出充填する工程と、射出充填された合成樹脂を冷却固化する工程と、金型を型開きする工程と、成形体を金型から突き出しピンで突き出すことによる離型する工程とを備えている。特に、上述のとおり、射出充填する工程におけるゲート位置に特徴を有している。 In the manufacturing method for obtaining the resin sliding bearing of the present invention, a synthetic resin melted from a gate such as a tunnel gate provided in a portion serving as an elastic piece is injected into a mold having a cavity of the shape of the resin sliding bearing having the above configuration. A step of filling, a step of cooling and solidifying the injection-filled synthetic resin, a step of opening the mold, and a step of releasing the molded body from the mold with a protruding pin. In particular, as described above, the gate position in the injection filling process is characteristic.
　本発明の樹脂滑り軸受を美容器に適用した例を図３に基づいて説明する。図３は、本発明の美容器の一例であり、その回転体支持部分を示す概略図である。図３に示すように、美容器１１は、ハンドル１２の先端部に回転体である球体１３を備えている。球体１３は、ハンドル１２の先端部の支持軸１４に本発明の樹脂滑り軸受１を介して回転可能に支持されている。球体１３の内部に、樹脂滑り軸受１を押し込むことで、係止爪３が弾性片４の円筒内側方向への弾性変形を経て球体１３の内部の溝に係合する。これにより、球体１３と樹脂滑り軸受１とが固定される。また、軸受本体２の内周に支持軸１４を嵌挿し、貫通孔２ｂの先で止め輪などにより抜け止めをする。これにより、支持軸１４が樹脂滑り軸受１に支持される。これらの構成により、樹脂滑り軸受１は、該軸受に固定された球体１３を支持軸１４に対して回転可能に支持している。 An example in which the resin sliding bearing of the present invention is applied to a cosmetic device will be described with reference to FIG. FIG. 3 is an example of a cosmetic device according to the present invention, and is a schematic view showing a rotating body supporting portion thereof. As shown in FIG. 3, the cosmetic device 11 includes a sphere 13 that is a rotating body at the distal end portion of the handle 12. The spherical body 13 is rotatably supported on the support shaft 14 at the distal end portion of the handle 12 via the resin sliding bearing 1 of the present invention. By pushing the resin sliding bearing 1 into the inside of the sphere 13, the locking claw 3 is engaged with a groove inside the sphere 13 through elastic deformation of the elastic piece 4 toward the inside of the cylinder. Thereby, the spherical body 13 and the resin sliding bearing 1 are fixed. Further, the support shaft 14 is inserted into the inner periphery of the bearing body 2 and is prevented from coming off by a retaining ring or the like at the end of the through hole 2b. As a result, the support shaft 14 is supported by the resin sliding bearing 1. With these configurations, the resin sliding bearing 1 supports the sphere 13 fixed to the bearing so as to be rotatable with respect to the support shaft 14.
　回転体の形状は特に限定されず、図３に示す球体１３の他、円筒状や角柱状のローラなどを採用できる。この種の美容器は、顔や手足などの皮膚に対して美肌を高める、あるいは維持する目的で、あるいはマッサージ効果を目的に、球体やローラを素肌に押し当てて回転させながら使用される。 The shape of the rotating body is not particularly limited, and a cylindrical or prismatic roller or the like can be adopted in addition to the spherical body 13 shown in FIG. This type of beauty device is used while rotating or rotating a sphere or roller against the skin for the purpose of enhancing or maintaining the skin to the skin such as the face and limbs, or for the purpose of massage effect.
　本発明の樹脂滑り軸受は、回転体を固定するための係止爪を支える弾性変形部が破損することを防止でき、必要に応じて射出成形時の独立したゲートカット工程を省略して製造できるので、ハンドルの先端部に球体やローラを備えた美容器において、この球体やローラを支持する軸受として好適に利用できる。 The resin sliding bearing of the present invention can prevent the elastic deformation part supporting the locking claw for fixing the rotating body from being damaged, and can be manufactured by omitting an independent gate cutting process at the time of injection molding as necessary. Therefore, in a cosmetic device having a sphere or a roller at the tip of the handle, it can be suitably used as a bearing for supporting the sphere or roller.
　１　樹脂滑り軸受
　２　軸受本体
　３　係止爪
　４　弾性片
　５　ゲート痕
　６　軸受本体と弾性片との境界部
　１１　美容器
　１２　ハンドル
　１３　球体
　１４　支持軸 DESCRIPTION OF SYMBOLS 1 Resin sliding bearing 2 Bearing main body 3 Locking claw 4 Elastic piece 5 Gate trace 6 Boundary part of a bearing main body and an elastic piece 11 Cosmetic device 12 Handle 13 Sphere 14 Support shaft

Claims (8)

  1. 　回転体を支持軸に回転可能に支持する樹脂滑り軸受であって、
    　該樹脂滑り軸受は、合成樹脂を射出成形してなる射出成形体であり、
    　前記支持軸を嵌挿可能な略円筒状の軸受本体と、前記回転体を該滑り軸受に固定するための係止爪と、該係止爪を外周側に配置するとともに前記係止爪を前記軸受本体の円筒内側方向に弾性的に押し込み可能な弾性片とを有し、
    　前記弾性片は、前記射出成形によるゲート痕を有し、前記軸受本体と一体に形成されていることを特徴とする樹脂滑り軸受。     A resin sliding bearing that rotatably supports a rotating body on a support shaft,
    The resin sliding bearing is an injection molded body formed by injection molding a synthetic resin,
    A substantially cylindrical bearing body into which the support shaft can be inserted, a locking claw for fixing the rotating body to the sliding bearing, the locking claw disposed on the outer peripheral side, and the locking claw An elastic piece that can be elastically pushed inwardly into the cylinder of the bearing body,
    The elastic piece has a gate mark formed by the injection molding and is formed integrally with the bearing main body.
  2. 　前記係止爪は、前記弾性片の前記軸受本体との境界部に対して該弾性片の長さ方向反対側の端部に設けられ、前記ゲート痕は、前記弾性片の長さ方向で中央部から前記係止爪の最端部までの間に位置することを特徴とする請求項１記載の樹脂滑り軸受。 The locking claw is provided at an end portion of the elastic piece opposite to the length direction of the elastic piece with respect to a boundary portion of the elastic piece with the bearing body, and the gate mark is a center in the length direction of the elastic piece. The resin sliding bearing according to claim 1, wherein the resin sliding bearing is located between the portion and the end of the locking claw.
  3. 　前記ゲート痕は、前記弾性片の内周側に位置することを特徴とする請求項１記載の樹脂滑り軸受。 The resin sliding bearing according to claim 1, wherein the gate mark is located on an inner peripheral side of the elastic piece.
  4. 　前記ゲート痕は、トンネルゲートによるゲート痕であることを特徴とする請求項３記載の樹脂滑り軸受。 4. The resin sliding bearing according to claim 3, wherein the gate mark is a gate mark by a tunnel gate.
  5. 　前記係止爪および前記弾性片は、前記軸受本体の円周上に等間隔で複数個形成されていることを特徴とする請求項１記載の樹脂滑り軸受。 The resin sliding bearing according to claim 1, wherein a plurality of the locking claws and the elastic pieces are formed at equal intervals on a circumference of the bearing body.
  6. 　前記弾性片の内周面は、前記支持軸に非接触状態であることを特徴とする請求項１記載の樹脂滑り軸受。 2. The resin sliding bearing according to claim 1, wherein an inner peripheral surface of the elastic piece is in a non-contact state with the support shaft.
  7. 　前記回転体が、球体またはローラであることを特徴とする請求項１記載の樹脂滑り軸受。 The resin sliding bearing according to claim 1, wherein the rotating body is a sphere or a roller.
  8. 　ハンドルの先端部に球体またはローラを備えた美容器であって、
    　回転体である前記球体または前記ローラが、前記ハンドルの先端部の支持軸に軸受を介して回転可能に支持されており、
    　前記軸受が、請求項１記載の樹脂滑り軸受であることを特徴とする美容器。     A cosmetic device with a sphere or roller at the tip of the handle,
    The spherical body or the roller, which is a rotating body, is rotatably supported via a bearing on a support shaft at the tip of the handle,
    The cosmetic device according to claim 1, wherein the bearing is a resin sliding bearing according to claim 1.
PCT/JP2015/077686 2014-10-06 2015-09-30 Resin slide bearing and cosmetic device WO2016056440A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202021101949U1 (en) 2021-04-12 2022-07-18 Igus Gmbh precision slide bearing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030002758A1 (en) * 2000-09-29 2003-01-02 Xerox Corporation Bearing
JP2005337381A (en) * 2004-05-27 2005-12-08 Ntn Corp Accurate slide bearing
JP2007259548A (en) * 2006-03-22 2007-10-04 Nidec Sankyo Corp Motor
JP2012210811A (en) * 2011-03-24 2012-11-01 Ntn Corp Molding die for bearing holder, bearing holder, and method for producing bearing holder
JP2013103085A (en) * 2011-11-16 2013-05-30 Mtg:Kk Beauty instrument

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030002758A1 (en) * 2000-09-29 2003-01-02 Xerox Corporation Bearing
JP2005337381A (en) * 2004-05-27 2005-12-08 Ntn Corp Accurate slide bearing
JP2007259548A (en) * 2006-03-22 2007-10-04 Nidec Sankyo Corp Motor
JP2012210811A (en) * 2011-03-24 2012-11-01 Ntn Corp Molding die for bearing holder, bearing holder, and method for producing bearing holder
JP2013103085A (en) * 2011-11-16 2013-05-30 Mtg:Kk Beauty instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202021101949U1 (en) 2021-04-12 2022-07-18 Igus Gmbh precision slide bearing

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