JP2865564B2 - Vibration generator - Google Patents
Vibration generatorInfo
- Publication number
- JP2865564B2 JP2865564B2 JP14547494A JP14547494A JP2865564B2 JP 2865564 B2 JP2865564 B2 JP 2865564B2 JP 14547494 A JP14547494 A JP 14547494A JP 14547494 A JP14547494 A JP 14547494A JP 2865564 B2 JP2865564 B2 JP 2865564B2
- Authority
- JP
- Japan
- Prior art keywords
- rotating shaft
- eccentric weight
- mounting hole
- deformed
- vibration generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 229910002482 Cu–Ni Inorganic materials 0.000 description 5
- 238000005245 sintering Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000012255 powdered metal Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910018054 Ni-Cu Inorganic materials 0.000 description 1
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 229910018481 Ni—Cu Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は小型モーターによる振動
発生器に関し、特に小型無線呼出機に用いられるもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration generator using a small motor, and more particularly, to a small radio paging device.
【０００２】[0002]
【従来の技術】最近、小型無線呼出機として振動発生器
を内蔵し、呼出音に代えて振動で着信を知らせる方式の
ものが普及している。この振動発生器の一例を図３によ
り説明すると、小型無線呼出機に内蔵された小型モータ
ー（１）の回転軸（２）に黄銅製ブッシュ（３）を圧入
固定し、該ブッシュ（３）の外周に扇板状の偏心分銅
（４）が偏心した位置に接着固定されている。そしてこ
の偏心分銅は通常タングステン等の焼結合金から作られ
ている。2. Description of the Related Art In recent years, a small-sized wireless paging apparatus having a built-in vibration generator and notifying an incoming call by vibration instead of a ringing tone has become widespread. An example of this vibration generator will be described with reference to FIG. 3. A brass bush (3) is press-fitted and fixed to a rotating shaft (2) of a small motor (1) built in a small wireless paging device. A fan-shaped eccentric weight (4) is adhesively fixed to the outer periphery at an eccentric position. The eccentric weight is usually made of a sintered alloy such as tungsten.
【０００３】このように従来の振動発生器においては偏
心分銅を接着剤により接着固定するものであるため、接
着剤との濡れ性の良い黄銅製ブッシュを介在させていた
ものである。従って偏心分銅を回転軸に固定する工程が
多く、コストアップにつながっていた。As described above, in the conventional vibration generator, since the eccentric weight is bonded and fixed by the adhesive, the brass bush having good wettability with the adhesive is interposed. Therefore, there are many steps for fixing the eccentric weight to the rotating shaft, leading to an increase in cost.
【０００４】そこでこのような製造方法を改善し製造コ
ストを低減させる方法として、偏心分銅の貫通孔に回転
軸を貫入し、該貫通孔の外周部を加締めることにより該
貫通孔の断面形状を長円形に塑性変形させて回転時の回
り止めとした技術が実公平４−１３８６０号公報に記載
されている。Therefore, as a method of improving such a manufacturing method and reducing the manufacturing cost, a rotary shaft is inserted into the through hole of the eccentric weight and the outer peripheral portion of the through hole is swaged to reduce the cross-sectional shape of the through hole. Japanese Patent Publication No. 4-13860 discloses a technique of plastically deforming an ellipse to prevent rotation during rotation.
【０００５】[0005]
【発明が解決しようとする課題】上記の方法は、偏心分
銅としてＷ−Ｎｉ−Ｆｅ系、Ｗ−Ｎｉ−Ｃｕ系等の比重
17〜18ｇ／ccの高比重焼結合金を使用し、これら材料の
展延性や硬度を利用して外力により加締めるものであ
る。ところがＷを使用した分銅は高価であり、またこれ
らの金属粉末を焼結するには高温焼結が必要であるため
製造コストを引き上げていた。さらにこれら焼結体は焼
結の際に収縮が大きく、このためモーターの回転軸の貫
通孔の寸法精度が得にくいので焼結後二次加工を施して
孔径の精度を出していた。このような後加工もコストア
ップの要因となっていた。The above-mentioned method uses a specific gravity of W-Ni-Fe, W-Ni-Cu or the like as an eccentric weight.
A high specific gravity sintered alloy of 17 to 18 g / cc is used, and it is crimped by an external force using the extensibility and hardness of these materials. However, weights using W are expensive, and sintering these metal powders requires high-temperature sintering, which increases the production cost. Furthermore, these sintered bodies shrink greatly during sintering, and it is difficult to obtain dimensional accuracy of the through-hole of the rotating shaft of the motor. Therefore, secondary processing is performed after sintering to obtain the accuracy of the hole diameter. Such post-processing also causes an increase in cost.
【０００６】[0006]
【課題を解決するための手段】本発明はこれに鑑み検討
の結果、安価な材料を使用でき、さらに簡単な方法で製
造できる振動発生器を開発したもので、小型モーターの
回転軸に偏心分銅を固定してなる振動発生器において、
少なくとも偏心分銅に形成した回転軸取付孔の周囲を、
外部から押圧されたときに変形して該取付孔に挿入され
た回転軸を略クランク状又は円弧状に曲げ変形させ、同
時に該曲げ変形した該回転軸により押圧変形させられる
軟質金属又は粉末金属の焼結体とし、該偏心分銅の該取
付孔に挿入した回転軸と該取付孔とを同時に変形するこ
とにより、偏心分銅と回転軸とを一体としたことを特徴
とするものである。SUMMARY OF THE INVENTION In view of the above, the present invention has developed a vibration generator which can use inexpensive materials and can be manufactured by a simpler method. As a result, an eccentric weight is attached to the rotating shaft of a small motor. In a vibration generator with fixed
At least around the rotation shaft mounting hole formed in the eccentric weight,
Deformed when pressed from outside and inserted into the mounting hole
The bent rotating shaft is bent and deformed into a substantially crank shape or an arc shape,
Sometimes pressed and deformed by the bent shaft
A sintered body of a soft metal or powdered metal, and the removal of the eccentric weight
The rotating shaft inserted into the hole and the mounting hole can be deformed simultaneously.
Thus, the eccentric weight and the rotating shaft are integrated with each other.
【０００７】[0007]
【作用】本発明はこのように回転軸取付孔と該取付孔に
挿入した状態の回転軸とを同時に略クランク状又は円弧
状に塑性変形させて曲げることにより、分銅の軸の回り
の回転止めと軸からの抜け落ちを防いで両者を強固に一
体化したものである。この回転軸からの抜け落ちを防い
だ点からも、従来の加締めによる技術よりも優れた利点
を有している。According to the present invention, the rotating shaft mounting hole and the rotating shaft inserted into the mounting hole are simultaneously plastically deformed into a substantially crank shape or an arc shape and bent to thereby prevent rotation of the weight shaft. The two are firmly integrated with each other by preventing them from falling off the shaft. Also in view of preventing the falling-off from the rotating shaft, there is an advantage superior to the conventional caulking technique.
【０００８】また本発明によれば偏心分銅の材料とし
て、上記従来の加締めによる場合よりも安価で低比重の
Ｃｕ系、Ｃｕ−Ｎｉ系、Ｆｅ−Ｎｉ系、Ｗ−Ｃｕ−Ｎｉ
系焼結体を用いることができる。なおこれらの材料を従
来の加締め法に適用すると材料の展性、靭性や硬度が、
上記タングステン系焼結体より劣るため加締めることが
できない。According to the present invention, the material of the eccentric weight is Cu-based, Cu-Ni-based, Fe-Ni-based, W-Cu-Ni, which is less expensive and has a lower specific gravity than the conventional caulking.
A system sintered body can be used. If these materials are applied to the conventional caulking method, the malleability, toughness and hardness of the materials will increase.
Since it is inferior to the tungsten-based sintered body, it cannot be crimped.
【０００９】さらにこれらＣｕ系、Ｃｕ−Ｎｉ系、Ｆｅ
−Ｎｉ系、Ｗ−Ｃｕ−Ｎｉ系の焼結体は寸法精度が出し
易いため、偏心分銅の回転軸取付孔は後加工しなくても
焼結体のままで回転軸の挿入及び固定が可能である。Further, these Cu-based, Cu-Ni-based, Fe-based
-Ni-based and W-Cu-Ni-based sintered bodies are easy to obtain dimensional accuracy, so the rotating shaft mounting holes for eccentric weights can be inserted and fixed as they are without post-processing. It is.
【００１０】[0010]
【実施例】次に本発明の実施例について説明する。Ｆｅ
−Ｎｉ粉末とＣｕ粉末を混合して回転軸取付孔を有する
半円形状の偏心分銅形状に加圧成形した後、水素雰囲気
中で1250℃×60分間の焼結を行って、図１に示す偏心分
銅（４）を製造した。このときモーター（１）の回転軸
（２）の径は通常 0.8〜1.0mm であるが、分銅（４）の
回転軸取付孔（５）の内径はそれより約0.03mm大きく設
定した。そしてこの焼結体偏心分銅（４）の取付孔
（５）にモーターの回転軸（２）を挿入する。Next, an embodiment of the present invention will be described. Fe
-Ni powder and Cu powder were mixed and pressed into a semicircular eccentric weight having a rotation shaft mounting hole, and then sintered at 1250 ° C for 60 minutes in a hydrogen atmosphere, as shown in FIG. An eccentric weight (4) was produced. At this time, the diameter of the rotating shaft (2) of the motor (1) is usually 0.8 to 1.0 mm, but the inner diameter of the rotating shaft mounting hole (5) of the weight (4) is set to be about 0.03 mm larger than that. Then, the rotating shaft (2) of the motor is inserted into the mounting hole (5) of the sintered body eccentric weight (4).
【００１１】次に図１に示すように曲率半径 0.7mmの突
条（６）をブロックの下端面（８）から 0.3〜0.5mm の
高さだけ突出させた回転軸折り曲げ治具（７）を用い
て、偏心分銅（４）の下端面を図示していない保持台で
保持し、該分銅（４）の取付孔（５）上方の上端面
（９）を該治具（７）で押圧する。この際回転軸（２）
の直芯性を失わないように該治具（７）の下端面（８）
と突条（６）の突き出し量を調整した。このような操作
により、図２に示すように回転軸（２）は下方に凸に湾
曲し、これと同時に取付孔（５）も同形状に湾曲し、両
者は密接して一体に結合される。Next, as shown in FIG. 1, a rotary shaft bending jig (7) in which a ridge (6) having a radius of curvature of 0.7 mm protrudes from the lower end surface (8) of the block by a height of 0.3 to 0.5 mm. The lower end surface of the eccentric weight (4) is held by a holding table (not shown), and the upper end surface (9) of the weight (4) above the mounting hole (5) is pressed by the jig (7). . At this time, the rotating shaft (2)
Lower end surface (8) of the jig (7) so as not to lose the straightness of the
And the protrusion amount of the ridge (6) was adjusted. By such an operation, as shown in FIG. 2, the rotating shaft (2) curves downwardly convexly, and at the same time, the mounting hole (5) also curves in the same shape, and the two are tightly joined together. .
【００１２】このように本発明では回転軸の挿入された
取付孔の周囲の分銅材料の部分に局部的に加圧力を加え
て、この力を取付孔周囲の分銅材料を介して回転軸に及
ぼすものであり、さらに回転軸が湾曲した方向に接して
いる分銅材料は回転軸の変形に伴って変形しなければな
らない。従って焼結体である該偏心分銅の材料はこのよ
うな歪を受け入れるだけの空孔を有し、且つ回転軸を曲
げるのに十分な硬度も必要である。このような材料とし
ては上記のものの他Ｗ−Ｃｕ系とＮｉ系との焼結体、又
は粉末冶金による焼結体に代えてＣｕ合金等の軟質製品
でもよい。なおＷ−Ｃｕ−Ｎｉ系においては相対密度は
85〜93％程度が望ましい。As described above, according to the present invention, a pressing force is locally applied to a portion of the weight material around the mounting hole into which the rotating shaft is inserted, and this force is applied to the rotating shaft via the weight material around the mounting hole. The weight material whose rotating shaft is in contact with the curved direction must be deformed as the rotating shaft is deformed. Therefore, the material of the eccentric weight, which is a sintered body, needs to have holes enough to accept such a strain, and also have sufficient hardness to bend the rotating shaft. As such a material, a soft product such as a Cu alloy may be used in place of the above-described sintered body of a W-Cu-based and Ni-based, or a sintered body obtained by powder metallurgy. In the W-Cu-Ni system, the relative density is
About 85-93% is desirable.
【００１３】[0013]
【発明の効果】このように本発明によれば、偏心分銅と
して粉末金属の焼結体等の安価な材料を使用して小型モ
ーターの回転軸に簡単に取付けることができ、しかも分
銅が抜け落ちたりすることなく、確実に固定することが
可能である。As described above, according to the present invention, the eccentric weight and
And use inexpensive materials such as powdered metal
It can be easily attached to the rotating shaft of the motor, and can be securely fixed without the weight falling off.
【図１】本発明の一実施例における偏心分銅の取付け方
法を説明するもので、（ａ）は要部側断面図、（ｂ）は
正面図である。FIGS. 1A and 1B illustrate a method of attaching an eccentric weight according to an embodiment of the present invention. FIG. 1A is a sectional side view of a main part, and FIG.
【図２】本発明の一実施例での偏心分銅の取付け状態を
示す要部側断面図である。FIG. 2 is a side sectional view of a main part showing an attached state of an eccentric weight in one embodiment of the present invention.
【図３】従来例を示すもので（ａ）は要部側断面図、
（ｂ）は正面図である。3A and 3B show a conventional example, in which FIG.
(B) is a front view.
１ 小型モーター ２ 回転軸 ３ ブッシュ ４ 偏心分銅 ５ 回転軸取付孔 ６ 突条 ７ 折り曲げ治具 ８ ブロック下端面 ９ 分銅上端面 DESCRIPTION OF SYMBOLS 1 Small motor 2 Rotating shaft 3 Bush 4 Eccentric weight 5 Rotating shaft mounting hole 6 Ridge 7 Bending jig 8 Block lower surface 9 Weight upper surface
Claims (2)
てなる振動発生器において、少なくとも偏心分銅に形成
した回転軸取付孔の周囲を、外部から押圧されたときに
変形して該取付孔に挿入された回転軸を略クランク状又
は円弧状に曲げ変形させ、同時に該曲げ変形した回転軸
により押圧変形させられる軟質金属とし、該偏心分銅の
該取付孔に挿入した回転軸と該取付孔とを同時に変形す
ることにより、偏心分銅と回転軸とを一体としたことを
特徴とする振動発生器。1. A vibration generator comprising an eccentric weight fixed to a rotating shaft of a small motor, wherein the eccentric weight is formed at least on the eccentric weight.
Around the rotating shaft mounting hole when pressed from outside
The rotating shaft that has been deformed and inserted into the mounting hole is substantially crank-shaped or
Is bent in an arc shape, and at the same time, the rotating shaft is bent and deformed.
Soft metal that is pressed and deformed by the eccentric weight
The rotating shaft inserted into the mounting hole and the mounting hole are simultaneously deformed.
The vibration generator is characterized in that the eccentric weight and the rotating shaft are integrated with each other.
てなる振動発生器において、少なくとも偏心分銅に形成
した回転軸取付孔の周囲を、外部から押圧されたときに
変形して該取付孔に挿入された回転軸を略クランク状又
は円弧状に曲げ変形させ、同時に該曲げ変形した回転軸
により押圧変形させられる粉末金属の焼結体とし、該偏
心分銅の該取付孔に挿入した回転軸と該取付孔とを同時
に変形することにより、偏心分銅と回転軸とを一体とし
たことを特徴とする振動発生器。2. A vibration generator in which an eccentric weight is fixed to a rotating shaft of a small motor, wherein at least the eccentric weight is formed on the eccentric weight.
Around the rotating shaft mounting hole when pressed from outside
The rotating shaft that has been deformed and inserted into the mounting hole is substantially crank-shaped or
Is bent in an arc shape, and at the same time, the rotating shaft is bent and deformed.
A sintered body of powder metal pressed and deformed by
The rotating shaft inserted into the mounting hole of the center weight and the mounting hole
The vibration generator is characterized in that the eccentric weight and the rotating shaft are integrated into one body by being deformed .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14547494A JP2865564B2 (en) | 1994-06-03 | 1994-06-03 | Vibration generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14547494A JP2865564B2 (en) | 1994-06-03 | 1994-06-03 | Vibration generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07328540A JPH07328540A (en) | 1995-12-19 |
| JP2865564B2 true JP2865564B2 (en) | 1999-03-08 |
Family
ID=15386091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14547494A Expired - Lifetime JP2865564B2 (en) | 1994-06-03 | 1994-06-03 | Vibration generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2865564B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3708731B2 (en) * | 1998-03-18 | 2005-10-19 | アルプス電気株式会社 | Vibration generator and method of attaching a weight to the vibration generator |
-
1994
- 1994-06-03 JP JP14547494A patent/JP2865564B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07328540A (en) | 1995-12-19 |
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