JP2004095848A - Cable holding structure of electric apparatus and manufacturing method thereof - Google Patents

Cable holding structure of electric apparatus and manufacturing method thereof Download PDF

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Publication number
JP2004095848A
JP2004095848A JP2002254856A JP2002254856A JP2004095848A JP 2004095848 A JP2004095848 A JP 2004095848A JP 2002254856 A JP2002254856 A JP 2002254856A JP 2002254856 A JP2002254856 A JP 2002254856A JP 2004095848 A JP2004095848 A JP 2004095848A
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Japan
Prior art keywords
cable
molding
main body
body case
holding
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JP2002254856A
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Japanese (ja)
Inventor
Hideki Tanaka
田中 秀樹
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Panasonic Industrial Devices SUNX Co Ltd
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Sunx Ltd
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  • Installation Of Indoor Wiring (AREA)
  • Cable Accessories (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Insertion, Bundling And Securing Of Wires For Electric Apparatuses (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Insulating Bodies (AREA)
  • Connection Or Junction Boxes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable holding structure of an electric apparatus and its manufacturing method, capable of surely preventing coming-off and securing a cable to a case body, while reducing number of components and costs. <P>SOLUTION: A holding part 16 integrally molded with a case body 13 comprises a pair of protruding pieces 18 arrayed in the circumferential direction of a cable 14. A holding ring 17 holds an upper-side protruding piece 19 which is constricted by molding dies 21a and 21b at molding to bite in the outer periphery of the cable 14, as it is. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、電気機器のケーブル保持構造及びその製造方法に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
電気機器において本体ケースの導出部から導出されたケーブルを保持する構造の一例が実公平5−46303号公報に開示されている。これは、前記導出部が、本体ケースに一体的に形成されケーブルの挿通孔に連通する凹所を有する固定用枠と、その固定用枠の凹所の内壁面とケーブルとの間に挿入される環状の弾性部材と、その弾性部材を後方から押し付けつつ前記凹所に嵌着されるキャップ部とからなる。固定用枠内にキャップ部を嵌着させることで、弾性部材が弾性変形してその内側がケーブルの外周に密着するように縮径し、もってケーブルを本体ケースに対して抜き止め状態で固定することができる。
【0003】
しかしながら、この保持構造では、弾性部材やキャップ部等、部品点数が多くなり部品コストが高くなる。また、弾性部材及びキャップ部の嵌合作業が必要になるとともに、その際、キャップ部が凹所に斜めに嵌着されるなどして弾性部材がケーブルの外周に十分に密着されず抜き止め固定されないといった問題が生じ得る。
【0004】
一方、上記構成とは異なり、弾性部材等を用いない保持構造が、実開昭59−156343号公報に開示されている。この導出部は、本体ケースに突設した筒状の保持部と、その保持部及びケーブルの突出部分の周りを包囲するように二次成形された樹脂製の成形部材とから構成されている。しかしながら、保持部は、成形前においてケーブルを挿通させる必要があり、ケーブルの外周よりやや大きめの内径に形成されている。また、保持部は、筒状をなすので金型成形による締付力によってもほとんど縮径せず、成形後においても保持部の内面とケーブルとの間に隙間が生じたままとなる。従って、この保持構造ではケーブルと成形樹脂との密着性によってケーブルを抜き止め状態とするものであるが、例えばケーブルの外皮の材料によっては成形樹脂との密着性が悪いものもあり、本体ケースに対してケーブルを抜き止め固定できないことがあるという問題がある。また、それを解決するために、この公報では、ケーブルの外周と保持部とを接着剤で接着するようにしているが、余分なコストと手間がかかりやはり望ましくない。
【0005】
本発明は、上記事情に鑑みてなされたもので、その目的は、部品点数やコストを少なくしつつ本体ケースに対してケーブルを確実に抜き止め固定することが可能な電気機器のケーブル保持構造及びケーブル保持方法を提供するところにある。
【0006】
【課題を解決するための手段】
上記目的を達成するため、請求項1の発明に係る電気機器のケーブル保持構造は、本体ケースに、ケーブルを外部へ導出させる導出部を突設してなる電気機器のケーブル保持構造であって、導出部が本体ケースに一体的に形成されてケーブルの外皮に接する保持部と、この保持部を覆うように成形された樹脂からなる成形部材を備えたものにおいて、保持部は、ケーブルの周方向に配列された複数の突出片からなり、かつ、それら複数の突出片のうち少なくとも1つがケーブルの径方向に変形可能な構成とされ、成形部材は、その成形時における成形金型の締め付けによって変形されケーブルの外周に食い込んだ状態となった変形可能な突出片をその状態に保持しているところに特徴を有する。
【0007】
請求項2の発明に係る電気機器のケーブル保持構造の製造方法は、本体ケースに、ケーブルを外部へ導出させる導出部を突設してなる電気機器のケーブル保持構造であって、導出部が本体ケースに一体的に形成されてケーブルの外皮に接する保持部と、この保持部を覆うように成形された樹脂からなる成形部材とを備えたものの製造方法において、保持部は、ケーブルの周方向に配列された複数の突出片からなり、かつ、それら複数の突出片のうち少なくとも1つがケーブルの径方向に変形可能な構成とされ、複数の突出片内にケーブルを挿通し、成形部材の成形時に成形金型で変形可能な突出片を変形させてケーブルの外周に食い込ませ、その状態で成形金型と突出片との間に樹脂を注入して成形部材を成形するところに特徴を有する。
【0008】
【発明の作用及び効果】
本発明によれば、本体ケースに一体成形された保持部は、ケーブルの周方向に配列された複数の突出片からなり、かつ、それらのうち少なくとも1つがケーブルの径方向に変形可能な構成とされている。また、保持部の周囲を包囲するように成形された成形部材は、その成形時における成形金型の締め付けによって変形されケーブルの外周に食い込んだ状態となった突出片をその状態に保持している。
【0009】
保持部を複数の突出片で構成したから、成形部材の成形時に成形金型の締め付けによって容易に変形しケーブルの外周に食い込ませることができ、筒状の導出部を備えた従来構成とは異なり、接着剤を必要とすることなく本体ケースに対してケーブルを抜き止め固定することができる。しかも、成形部材の成形と同時に本体ケースに対してケーブルを抜き止め固定することができるから、更なる製造工程を増やす必要がなく容易に製造することができる。また、弾性部材やキャップ部等といった余分な部品を用いることなくケーブル保持構造を実現することができ、部品点数やコスト増加を押えることが可能になる。
【0010】
【発明の実施の形態】
本発明の一実施形態について図1ないし図5によって説明する。
本実施形態の電気機器は、検出領域に向けて並設された投光素子11及び受光素子12を備えて、検出領域内の物体の有無を光学的に検知する、いわゆる反射型光電センサ10である。図1は、その反射型光電センサ10を後方からみた全体斜視図である。
【0011】
同図に示すように、反射型光電センサ10の本体ケース13は、樹脂(例えばポリブチレンテフタレート:PBT)からなる箱状体であって、この本体ケース13の後面(同図中、紙面手前側)に、図示しない内部回路に連なる信号線を外皮で覆ったケーブル14を外部に導出する導出部15が突設されている。
【0012】
一方、本体ケース13の前面(同図紙面上奥側)には上記内部回路に連なる投光素子11及び受光素子12が本体ケース13の前方を望むように並設されている。反射型光電センサ10の前面を所定の検出領域に向けて配置し、例えばケーブル14に連なる制御装置からの駆動信号に基づいて投光素子11を発光させるとともに、検出領域からの反射光を受光素子12で受けて、その受光量に応じたレベルの受光信号を内部回路側に出力するようになっている。検出領域の物体の有無により受光素子12での受光量が異なるから、受光素子からの受光信号レベルを所定の閾値と比較することで物体検出が可能となる。そこで、内部回路では、受光素子12から受光信号レベルを所定の基準レベルと比較し、その比較結果に応じた出力信号をケーブル14を介して再び制御装置に出力するようになっている。
【0013】
さて、次に上記導出部15の構造・及び製造方法について次に説明する。導出部15は、本体ケース13に一体成形された保持部16と、その保持部16の周囲を包囲するように二次成形された樹脂からなる保持リング17(本発明の「成形部材」に相当)とから構成されている。図2には、上記二次成形前の保持部16が示されている。本体ケース13の後面には、ケーブル14を挿通可能な貫通孔13aが形成され、保持部16は、導出されたケーブル14を上下で挟み込むように対向配置された一対の突出片18,18から構成されている。以下、これら一対の突出片について、これらを区別する場合は上側の突出片を上側突出片19、下側の突出片を下側突出片20として、特に区別しない場合は共通の符号18を付して説明する。
【0014】
両突出片18は、内面がケーブル14の外周曲面に対応した曲面状をなし、両突出片18の間隔は、二次成形前においては本体ケース13の貫通孔13aから導出されたケーブル14を通すことが可能な間隔になっている。このうち、下側突出片20は、基端から先端にかけて全体としてほぼ均一の厚さに形成されており、外面のうち長手方向における略中央に、二次成形時に成形金型に接触する凸部20aが一体形成されている。これに対して、上側突出片19は、基端側から先端に向うに連れて徐々に厚肉になるよう外面がテーパ状に形成され、先端側では下側突出片20より厚肉になっている。また、上側突出片19の外面のうち長手方向における略中央には、やはり二次成形時に成形金型に接触する凸部19aが一体形成されている。また、上側突出片19は、基端側がくびれて下側突出片20よりも薄肉になっており、これにより下側突出片20によりも比較的弱い力で上下方向に変形させることができるよう構成されている。なお、本体ケース13の貫通孔13aは、次述する二次成形時に成形樹脂材料が本体ケース13内に侵入しないようにするために、ケーブル14の外径とほぼ同等の径に形成することが望ましい。
【0015】
次に保持リング17の二次成形方法については、まず、図3に示すように、本体ケース13の貫通孔13a及び両突出片18間にケーブル14を通した状態で、下側金型21a内に載置する。このとき、保持リング17用のキャビティS部分では下側突出片20の凸部20aだけが下側金型21aに接触した状態となっている。そして、上側金型21bを上方から被せて両金型21a,21bによって上下方向から締め付ける。ここで、上述したように上側突出片19は、下側突出片20より先端側に向けて厚肉に形成されており、その厚み分だけ、凸部19aが上側金型21bに接触してから更に下側に押し付けられることになる。つまり、図4に示すように、両金型21a,21bを締付力によって上側突出片19がケーブル14側に変形し、その先端部分がケーブル14の外皮に食い込んだ状態となる。そして、その状態で、保持リング17用のキャビティS内に成形樹脂材料(例えばポリブチレンテフタレート:PBT)を注入して固化させることで保持リング17が成形され、この保持リング17によって上側突出片19をケーブル14の外皮に食い込ませた状態に保持することができる(図5参照)。
【0016】
このような構成によれば、上側突出片19がケーブル14の外皮に食い込んだ状態で保持リング17によって保持されるから、導出部を筒状とした従来構成とは異なり、接着剤を必要とすることなく本体ケース13に対してケーブル14を抜き止め固定することができる。また、このような保持構造を保持リング17の二次成形時において形成することができるから、更なる製造工程を増やす必要がなく容易に製造することができる。また、弾性部材やキャップ部等といった余分な部品を用いることなくケーブル保持構造を実現することができ、部品点数やコスト増加を押えることが可能になる。
【0017】
<他の実施形態>
本発明は、前記実施形態に限定されるものではなく、例えば、以下に説明するような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。
(1)上記実施形態では、保持部16を一対の突出片18で構成したが、これに限らず、3つ以上の突出片で構成しても良い。
【0018】
(2)また、上記実施形態では、上側突出片19だけが成形金型21a,21bによって押し込まれるよう変形可能な構成としたが、保持部16を構成するすべての突出片を変形可能な構成としても良い。
【0019】
(3)突出片18の内面に1又は複数の突起部を設けて、成形金型で押え込まれることでケーブル14の外皮に食い込むようにしても良い。このような構成であれば、ケーブル14の外皮に突起部を容易に食い込ませることができるとともに、抜け止め強度を高めることが可能になる。
【0020】
(4)上記実施形態では電気機器が反射型光電センサ10である場合について説明したが、これに限らず、本体ケースに、ケーブルを外部へ導出させる導出部を突設してなる電気機器であれば本発明を適用することができる。
【0021】
(5)上記実施形態では成形部材は、保持部16の周囲を包囲するように成形された筒状の保持リング17としたが、これに限らず、例えば上側突出片19(変形可能な突出片)側だけを覆うような形状であっても良い。ただし、上記実施形態のように保持部16の周囲を包囲するような形状にすることで、変形可能な上側突出片19を、ケーブル14の外皮に食い込ませた状態で保持する力をより強くすることができる。
【0022】
(6)上記実施形態では、本体ケース及び保持部16(突出片18)を樹脂によって一体成形により構成したものとしたが、それらを例えば金属によって一体的に形成したものであっても良い。このような構成であっても成形部材の成形時における金型によって金属製の突出片(全部又は一部)をケーブルの外皮に食い込ませるよう変形させることで変形された突出片がケーブルの外皮にカシメ状に引っ掛ることになり、もって本体ケースに対してケーブルを抜け止め固定することができる。
【図面の簡単な説明】
【図1】本発明の一実施形態に係る反射型光電センサを後方からみた全体斜視図
【図2】二次成形前の保持部部分の拡大斜視図
【図3】成形金型締め付け前の本体ケース断面図及びキャビティ部分の拡大断面図
【図4】成形金型締め付け後の本体ケース断面図及びキャビティ部分の拡大断面図
【図5】二次成形後の反射型光電センサの断面図及び導出部部分の拡大断面図
【符号の説明】
10…反射型光電センサ(電気機器)
13…本体ケース
14…ケーブル
15…導出部
16…保持部
17…保持リング(成形部材)
18(19,20)…突出片
21a,21b…成形金型
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cable holding structure for an electric device and a method for manufacturing the same.
[0002]
Problems to be solved by the prior art and the invention
An example of a structure for holding a cable led out of a lead-out portion of a main body case in an electric device is disclosed in Japanese Utility Model Publication No. 5-46303. This is because the lead-out portion is formed integrally with the main body case and has a recess having a recess communicating with the cable insertion hole, and is inserted between the inner wall surface of the recess of the fixation frame and the cable. And a cap portion fitted into the recess while pressing the elastic member from behind. By fitting the cap portion into the fixing frame, the elastic member is elastically deformed, and the diameter of the elastic member is reduced so that the inner side thereof is in close contact with the outer periphery of the cable, thereby fixing the cable to the main body case in a retaining state. be able to.
[0003]
However, in this holding structure, the number of components such as the elastic member and the cap portion increases, and the component cost increases. In addition, the fitting operation of the elastic member and the cap portion is required, and at this time, the elastic portion is not sufficiently adhered to the outer periphery of the cable due to the cap portion being obliquely fitted into the concave portion, and is fixed so as not to be pulled out. The problem of not being able to do so may arise.
[0004]
On the other hand, unlike the above configuration, a holding structure that does not use an elastic member or the like is disclosed in Japanese Utility Model Laid-Open No. 59-156343. The lead-out portion includes a cylindrical holding portion protruding from the main body case, and a resin molded member that is secondarily formed so as to surround the holding portion and the protruding portion of the cable. However, the holding portion requires the cable to be inserted before molding, and is formed with an inner diameter slightly larger than the outer periphery of the cable. In addition, since the holding portion has a cylindrical shape, the diameter of the holding portion is hardly reduced even by the tightening force due to the molding, and a gap remains between the inner surface of the holding portion and the cable even after the molding. Therefore, in this holding structure, the cable is prevented from being pulled out by the adhesiveness between the cable and the molding resin. On the other hand, there is a problem that the cable cannot be pulled out and fixed. In order to solve the problem, in this publication, the outer periphery of the cable and the holding portion are bonded with an adhesive, but this is not desirable because it requires extra cost and labor.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cable holding structure of an electric device capable of securely removing and fixing a cable to a main body case while reducing the number of parts and cost, and It is to provide a cable holding method.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a cable holding structure for an electric device according to the invention of claim 1 is a cable holding structure for an electric device in which a lead-out portion that leads a cable to the outside is projected from a main body case, The lead portion is formed integrally with the main body case and has a holding portion in contact with the outer cover of the cable, and a molding member made of resin molded so as to cover the holding portion. , And at least one of the plurality of protruding pieces is configured to be deformable in the radial direction of the cable, and the molding member is deformed by tightening a molding die at the time of molding. It is characterized in that the deformable protruding piece that has been cut into the outer periphery of the cable is held in that state.
[0007]
According to a second aspect of the present invention, there is provided a method for manufacturing a cable holding structure for an electric device, comprising: a main body case having a protruding portion for protruding a cable to the outside; In a method for manufacturing a device including a holding portion formed integrally with the case and in contact with the outer cover of the cable, and a molded member made of resin molded so as to cover the holding portion, the holding portion extends in a circumferential direction of the cable. Consisting of a plurality of protruding pieces arranged, and at least one of the plurality of protruding pieces is configured to be deformable in the radial direction of the cable, and the cable is inserted into the plurality of protruding pieces to form a molding member. It is characterized in that a deformable protruding piece is deformed by a molding die and bites into the outer periphery of the cable, and in that state, a resin is injected between the molding die and the protruding piece to form a molded member.
[0008]
Function and effect of the present invention
According to the present invention, the holding portion integrally formed with the main body case is constituted by a plurality of projecting pieces arranged in the circumferential direction of the cable, and at least one of them is deformable in the radial direction of the cable. Have been. In addition, the molding member molded so as to surround the periphery of the holding portion holds the protruding piece that has been deformed by tightening the molding die at the time of molding and has been cut into the outer periphery of the cable in that state. .
[0009]
Since the holding part is composed of a plurality of protruding pieces, it can be easily deformed and tightened into the outer periphery of the cable by tightening the molding die at the time of molding the molding member, unlike the conventional configuration with a cylindrical lead-out part The cable can be stopped and fixed to the main body case without requiring an adhesive. In addition, since the cable can be stopped and fixed to the main body case at the same time as the molding of the molded member, the production can be easily performed without the necessity of further increasing the number of production steps. Further, the cable holding structure can be realized without using extra parts such as an elastic member and a cap part, and the number of parts and cost can be suppressed.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
The electrical apparatus according to the present embodiment includes a light emitting element 11 and a light receiving element 12 arranged side by side toward a detection area, and is a so-called reflective photoelectric sensor 10 that optically detects the presence or absence of an object in the detection area. is there. FIG. 1 is an overall perspective view of the reflection type photoelectric sensor 10 as viewed from the rear.
[0011]
As shown in FIG. 1, the main body case 13 of the reflection-type photoelectric sensor 10 is a box-shaped body made of resin (for example, polybutylene terephthalate: PBT), and has a rear surface (in FIG. On the side), a lead-out portion 15 is provided to lead out a cable 14 in which a signal line connected to an internal circuit (not shown) is covered with an outer cover.
[0012]
On the other hand, a light projecting element 11 and a light receiving element 12 connected to the above-mentioned internal circuit are arranged side by side on the front surface of the main body case 13 (on the rear side of the drawing in FIG. 1) so that the front of the main body case 13 is desired. The front surface of the reflection-type photoelectric sensor 10 is arranged to face a predetermined detection area, and the light-emitting element 11 emits light based on a drive signal from a control device connected to the cable 14, for example, and the reflected light from the detection area is received by a light-receiving element. The light receiving signal is received at 12 and a light receiving signal of a level corresponding to the light receiving amount is output to the internal circuit side. Since the amount of light received by the light receiving element 12 differs depending on the presence or absence of an object in the detection area, the object can be detected by comparing the level of the light receiving signal from the light receiving element with a predetermined threshold. Therefore, in the internal circuit, the light receiving signal level from the light receiving element 12 is compared with a predetermined reference level, and an output signal corresponding to the comparison result is output to the control device again via the cable 14.
[0013]
Now, the structure and manufacturing method of the lead-out section 15 will be described below. The lead-out portion 15 includes a holding portion 16 formed integrally with the main body case 13 and a holding ring 17 made of a resin that is secondarily formed so as to surround the holding portion 16 (corresponding to a “molded member” of the present invention). ). FIG. 2 shows the holding portion 16 before the secondary molding. A through hole 13 a through which the cable 14 can be inserted is formed on the rear surface of the main body case 13, and the holding portion 16 includes a pair of projecting pieces 18, 18 which are opposed to each other so as to sandwich the lead-out cable 14 vertically. Have been. Hereinafter, the upper projecting piece is referred to as an upper projecting piece 19 and the lower projecting piece is referred to as a lower projecting piece 20 when these two projecting pieces are to be distinguished from each other. Will be explained.
[0014]
Both protruding pieces 18 have a curved surface whose inner surface corresponds to the outer peripheral curved surface of the cable 14, and the distance between the two protruding pieces 18 passes through the cable 14 led out from the through hole 13 a of the main body case 13 before the secondary molding. It is possible to have intervals. Among them, the lower protruding piece 20 is formed to have a substantially uniform thickness as a whole from the base end to the front end. 20a is integrally formed. On the other hand, the outer surface of the upper protruding piece 19 is formed in a tapered shape so as to gradually increase in thickness from the base end to the front end, and becomes thicker than the lower protruding piece 20 on the front end. I have. Further, a convex portion 19a, which also comes into contact with a molding die at the time of secondary molding, is formed integrally with the outer surface of the upper protruding piece 19 at substantially the center in the longitudinal direction. Further, the upper protruding piece 19 is narrower at the base end side and thinner than the lower protruding piece 20, so that the upper protruding piece 19 can be deformed in the vertical direction with a relatively weak force by the lower protruding piece 20. Have been. The through hole 13a of the main body case 13 may be formed to have a diameter substantially equal to the outer diameter of the cable 14 in order to prevent the molding resin material from entering the main body case 13 during the secondary molding described below. desirable.
[0015]
Next, as for the secondary molding method of the holding ring 17, first, as shown in FIG. 3, the cable 14 is passed between the through hole 13a of the main body case 13 and the two projecting pieces 18 while the lower mold 21a is being inserted. Place on At this time, only the projection 20a of the lower protruding piece 20 is in contact with the lower mold 21a in the cavity S for the retaining ring 17. Then, the upper mold 21b is covered from above and tightened by the two molds 21a and 21b from above and below. Here, as described above, the upper protruding piece 19 is formed to be thicker toward the distal end side than the lower protruding piece 20, and after the convex portion 19 a contacts the upper mold 21 b by the thickness thereof. It will be pressed further down. That is, as shown in FIG. 4, the upper protruding piece 19 is deformed toward the cable 14 by the tightening force of the two dies 21 a and 21 b, and the leading end portion is cut into the outer skin of the cable 14. In this state, a molding resin material (for example, polybutylene terephthalate: PBT) is injected into the cavity S for the holding ring 17 and solidified to form the holding ring 17. 19 can be held in a state of being cut into the outer skin of the cable 14 (see FIG. 5).
[0016]
According to such a configuration, since the upper protruding piece 19 is held by the holding ring 17 in a state of being cut into the outer sheath of the cable 14, unlike the conventional configuration in which the lead-out portion is cylindrical, an adhesive is required. The cable 14 can be stopped and fixed to the main body case 13 without the need. Further, since such a holding structure can be formed at the time of the secondary molding of the holding ring 17, it is possible to easily manufacture the holding ring 17 without increasing the number of manufacturing steps. Further, the cable holding structure can be realized without using extra parts such as an elastic member and a cap part, and the number of parts and cost can be suppressed.
[0017]
<Other embodiments>
The present invention is not limited to the above-described embodiment. For example, the following embodiments are also included in the technical scope of the present invention, and further, various embodiments other than those described below may be made without departing from the scope of the invention. It can be changed and implemented.
(1) In the above embodiment, the holding portion 16 is constituted by the pair of projecting pieces 18, but is not limited to this, and may be constituted by three or more projecting pieces.
[0018]
(2) In the above-described embodiment, only the upper projecting piece 19 is configured to be deformable so as to be pushed by the molding dies 21a and 21b. However, all the projecting pieces constituting the holding unit 16 are configured to be deformable. Is also good.
[0019]
(3) One or a plurality of protrusions may be provided on the inner surface of the protruding piece 18, and the protrusion may be pressed into a molding die and cut into the outer skin of the cable 14. With such a configuration, it is possible to easily make the protruding portion bite into the outer cover of the cable 14, and it is possible to increase the retaining strength.
[0020]
(4) In the above embodiment, the case where the electric device is the reflection-type photoelectric sensor 10 has been described. However, the present invention is not limited to this, and any electric device having a lead-out portion that leads a cable to the outside in a main body case may be used. For example, the present invention can be applied.
[0021]
(5) In the above embodiment, the forming member is the cylindrical holding ring 17 formed so as to surround the periphery of the holding portion 16. However, the present invention is not limited to this. ) The shape may cover only the side. However, by forming the shape so as to surround the periphery of the holding portion 16 as in the above-described embodiment, the force for holding the deformable upper protruding piece 19 in a state where it is cut into the outer skin of the cable 14 is further increased. be able to.
[0022]
(6) In the above-described embodiment, the main body case and the holding portion 16 (the protruding piece 18) are integrally formed of resin. However, they may be integrally formed of, for example, metal. Even with such a configuration, the metal protruding piece (all or part) is deformed by the mold at the time of molding of the molded member so as to bite into the outer sheath of the cable, so that the deformed protruding piece becomes the outer sheath of the cable. The cable is hooked in a crimped shape, so that the cable can be prevented from coming off and fixed to the main body case.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a reflection type photoelectric sensor according to an embodiment of the present invention as viewed from behind. FIG. 2 is an enlarged perspective view of a holding portion before secondary molding. FIG. 3 is a main body before clamping of a molding die. FIG. 4 is a cross-sectional view of a main body case after fastening a molding die and an enlarged cross-sectional view of a cavity portion. FIG. 5 is a cross-sectional view of a reflection type photoelectric sensor after secondary molding and a lead portion. Enlarged sectional view of part
10 ... Reflection type photoelectric sensor (electric equipment)
13 ... body case 14 ... cable 15 ... lead-out part 16 ... holding part 17 ... holding ring (molded member)
18 (19, 20) ... projecting pieces 21a, 21b ... molding die

Claims (2)

本体ケースに、ケーブルを外部へ導出させる導出部を突設してなる電気機器のケーブル保持構造であって、前記導出部が前記本体ケースに一体的に形成されて前記ケーブルの外皮に接する保持部と、この保持部を覆うように成形された樹脂からなる成形部材を備えたものにおいて、
前記保持部は、前記ケーブルの周方向に配列された複数の突出片からなり、かつ、それら複数の突出片のうち少なくとも1つが前記ケーブルの径方向に変形可能な構成とされ、前記成形部材は、その成形時における成形金型の締め付けによって変形され前記ケーブルの外周に食い込んだ状態となった変形可能な前記突出片をその状態に保持していることを特徴とする電気機器のケーブル保持構造。
A cable holding structure for an electric device in which a lead-out portion for leading a cable to the outside is protruded from a main body case, wherein the lead-out portion is formed integrally with the main body case and is in contact with an outer cover of the cable. And a molding member made of resin molded so as to cover the holding portion,
The holding portion is configured by a plurality of projecting pieces arranged in a circumferential direction of the cable, and at least one of the plurality of projecting pieces is configured to be deformable in a radial direction of the cable, and the molding member is A cable holding structure for an electric device, wherein the deformable protruding piece, which has been deformed by tightening of a molding die at the time of molding and has been cut into the outer periphery of the cable, is held in that state.
本体ケースに、ケーブルを外部へ導出させる導出部を突設してなる電気機器のケーブル保持構造であって、前記導出部が前記本体ケースに一体的に形成されて前記ケーブルの外皮に接する保持部と、この保持部を覆うように成形された樹脂からなる成形部材とを備えたものの製造方法において、
前記保持部は、前記ケーブルの周方向に配列された複数の突出片からなり、かつ、それら複数の突出片のうち少なくとも1つが前記ケーブルの径方向に変形可能な構成とされ、
前記複数の突出片内に前記ケーブルを挿通し、前記成形部材の成形時に成形金型で変形可能な前記突出片を変形させて前記ケーブルの外周に食い込ませ、その状態で前記成形金型と前記突出片との間に樹脂を注入して前記成形部材を成形することを特徴とする電気機器のケーブル保持構造の製造方法。
A cable holding structure for an electric device in which a lead-out portion for leading a cable to the outside is protruded from a main body case, wherein the lead-out portion is formed integrally with the main body case and is in contact with an outer cover of the cable. And a molding method comprising a molded member made of resin molded so as to cover the holding portion,
The holding portion is configured of a plurality of projecting pieces arranged in a circumferential direction of the cable, and at least one of the plurality of projecting pieces is configured to be deformable in a radial direction of the cable,
The cable is inserted through the plurality of protruding pieces, and the protruding pieces deformable by a molding die at the time of molding the molding member are deformed and bite into the outer periphery of the cable. A method for manufacturing a cable holding structure for an electric device, comprising: injecting a resin between the projecting piece and the molded member to mold the molded member.
JP2002254856A 2002-08-30 2002-08-30 Cable holding structure of electric apparatus and manufacturing method thereof Pending JP2004095848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009043429A (en) * 2007-08-06 2009-02-26 Yamatake Corp Cable connection method and electronic equipment with cables connected
CN103748302A (en) * 2011-08-23 2014-04-23 本田制锁有限公司 External handle device for vehicle door
JP2020120039A (en) * 2019-01-25 2020-08-06 株式会社豊田自動織機 Electric power conversion apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009043429A (en) * 2007-08-06 2009-02-26 Yamatake Corp Cable connection method and electronic equipment with cables connected
CN103748302A (en) * 2011-08-23 2014-04-23 本田制锁有限公司 External handle device for vehicle door
US9279272B2 (en) 2011-08-23 2016-03-08 Kabushiki Kaisha Honda Lock External handle device for vehicle door
JP2020120039A (en) * 2019-01-25 2020-08-06 株式会社豊田自動織機 Electric power conversion apparatus
JP7077979B2 (en) 2019-01-25 2022-05-31 株式会社豊田自動織機 Power converter

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