JP3552764B2

JP3552764B2 - Small radio paging oscillator

Info

Publication number: JP3552764B2
Application number: JP27051294A
Authority: JP
Inventors: 剛樫村
Original assignee: Nidec Copal Corp
Current assignee: Nidec Copal Corp
Priority date: 1994-10-07
Filing date: 1994-10-07
Publication date: 2004-08-11
Anticipated expiration: 2019-08-11
Also published as: JPH08111961A

Description

【０００１】
【産業上の利用分野】
本発明は小型無線呼出機に関し、特に、着信時に本体に振動を発生させる発振器に関する。
【０００２】
【従来の技術】
周知のように、電話回線を利用した無線呼出しシステムに用いられる小型無線呼出機（ページャ）にあっては、ページャ利用者に着信があったことを知らせるために、周知の着信音の代りに、ページャ本体を振動させる構造のものが普及している。
【０００３】
即ち、図３及び図４は、例えば実公平４−１３８６０号公報及び実開平６−１９３３６号公報に示された小型無線呼出機の発振器であり、この加振器は着信信号により励磁される小型モータＡ_１，Ａ_２と、この小型モータＡ_１，Ａ_２の駆動軸Ｂ_１，Ｂ_２に固定される偏心振動子Ｃ_１，Ｃ_２とから構成され、偏心振動子Ｃ_１，Ｃ_２の回転運動により生じる不平衡振動で小型無線呼出機が加振され、小型無線呼出機利用者に着信があったことが告知される。
【０００４】
つまり、図３に示される従来の発振器は比重量の重いタングステン燒結合金からなる偏心振動子Ｃ_１の取付孔Ｄ_１に黄銅ブッシュＥを接着し、同黄銅ブッシュＥを小型モータＡ_１の駆動軸Ｂ_１に圧入・固定した構造であり、また、図４は同様の材料からなる偏心振動子Ｃ_２の取付部ｃに形成する取付孔Ｄ_２に小型モータＡ_２の駆動軸Ｂ_２を直接に挿入し、後から同取付部ｃをポンチ穴Ｆでカシメた構造である。
【０００５】
【発明が解決しようとする課題】
しかしながら、これらの従来の加振器の内、図３に示した構造は、小型モータＡ_１の駆動軸Ｂ_１に黄銅ブッシュＥが強固に圧入されるため、充分な取付け強度が維持されるけれども、同黄銅ブッシュＥを偏心振動子Ｃ_１の取付孔Ｄ_１に接着するので、接着剤が固化する時間が必要で、工程時間が長くなり、迅速な量産に向かず、黄銅ブッシュＥの使用で部品費が割高となる問題があった。
また、図４の構造はポンチ等の治具で迅速に組立てることはできるが、鋭いポンチを使用するため、クラック発生等による歩留まりが悪く、偏心振動子Ｃ_２はｐ_１，ｐ_２点で示す２点で駆動軸Ｂ_２に接触しているに過ぎないから、試作結果によると、約１０Ｋｇ程度の抜去力しか得られず、使用中に分解するおそれがあった。
【０００６】
本発明の目的は、以上に述べたような従来の小型無線呼出機の発振器の製作上の問題に鑑み、部品点数が少なく、迅速な組立工程で製作でき、取付け強度が充分な小型無線呼出機の発振器を得るにある。
【０００７】
【課題を解決するための手段】
この目的を達成するため、偏心振動子の取付孔に小型モータの駆動軸を挿入・固定して、小型無線呼出機に着信振動を加える小型無線呼出機の発振器において、前記取付孔の断面形状を四角形断面とし、同取付孔が形成される偏心振動子の取付部を前記四角形の対角方向にカシメることにより少なくとも４点以上の点で前記駆動軸の周面を前記取付孔に内接させたことを提案するものである。
【０００８】
【実施例】
以下、図１及び図２について本発明の実施例の詳細を説明する。
図１は本発明による小型無線呼出機の発振器の正面図であり、同加振器は、着信信号があったときに図示を省略する呼出機本体の回路からの通電により励磁される小型モータ１と、取付部２ａを後述する構造で小型モータ１の駆動軸１ａに強固に固定される比重量の大きな偏心振動子２とから構成されるのは従来と同様である。
【０００９】
図示実施例の特徴は取付部２ａに形成される四角形断面の取付孔３にあり、同取付孔３に小型モータ１の駆動軸１ａが挿入された後、図２に示すように、カシメ治具４によって取付部２ａが矢印方向即ち、取付孔３の頂点の対角方向にカシメられる。
【００１０】
勿論、取付孔３の断面形状は駆動軸１ａの周面に対する取付孔３の接触点を増加する目的であるから、他の多角形断面形状であってもよく、また、カシメ治具４の作用方向も矢印に対して直角な対角方向からのカシメであっても同様の作用効果を得ることができる。
【００１１】
図示実施例の小型無線呼出機の発振器は、以上のような構造であるから、小型モータ１の駆動軸１ａを偏心振動子２の取付孔３に挿入してカシメ部位が鋭くない平たい面状のカシメ治具４で取付孔３の対角方向からカシメるので、クラックの発生がなく、迅速に組立てることができる。
また、図２の実線示のように、カシメ治具４により偏心振動子２の取付部２ａをカシメた状態では、駆動軸１ａの周面は点Ｐ_１，Ｐ_２，Ｐ_３，Ｐ_４で示す４点で取付孔３に内接する状態が得られる。
したがって、このような４点での接触により駆動軸１ａに偏心振動子２を強固に固定できるから、使用中に、偏心振動子２が駆動軸１ａから外れることのない信頼性の高い構造となる。事実、図示構造（外形１ｍｍの駆動軸１ａに厚みが４．６ｍｍの偏心振動子２をカシメた例）の試作・試験結果によると、平均１８Ｋｇに達する優れた抜去力が得られている。
【００１２】
【発明の効果】
以上の説明から明らかなように、本発明によれば、部品点数が少なく、迅速に組立てることができる量産に適した構造であって、小型モータの駆動軸に対する偏心振動子の固定力の大きな信頼性の高い小型無線呼出機の発振器を達成できる。
【図面の簡単な説明】
【図１】本発明の小型無線呼出機の発振器の正面図である。
【図２】同加振器の要部拡大正面図である。
【図３】従来の小型無線呼出機の発振器の分解斜視図である。
【図４】他の従来の加振器の正面図である。
【符号の説明】
１小型モータ
１ａ駆動軸
２偏心振動子
２ａ取付部
３取付孔
４カシメ治具[0001]
[Industrial applications]
The present invention relates to a small wireless paging device, and more particularly, to an oscillator that generates vibration in a main body when an incoming call is received.
[0002]
[Prior art]
As is well known, in a small wireless pager (pager) used in a wireless paging system using a telephone line, in order to notify a pager user of an incoming call, instead of a well-known ringtone, The structure which vibrates a pager main body is widespread.
[0003]
3 and 4 show oscillators of a small radio paging device disclosed in, for example, Japanese Utility Model Publication No. 4-13860 and Japanese Utility Model Application Laid-Open No. 6-19336. This vibrator is a small-sized vibrator that is excited by an incoming signal. a motor _a 1, _{a 2,} is composed of the small motor _a 1, _{a 2} of the drive shaft _B 1, _{B 2} eccentric vibrators _C 1 that is fixed to, _{C 2} Prefecture, eccentric vibrators _C 1, _{C 2} The small wireless paging device is vibrated by the unbalanced vibration caused by the rotating motion, and the small wireless paging user is notified that there is an incoming call.
[0004]
That is, the conventional oscillator shown in Figure 3 a brass bushing E adhered to the mounting hole D ₁ of the eccentric vibrators C ₁ consisting of specific weight heavy tungsten sintered alloy, the same brass bush E of the small motor A ₁ drive shaft a structure was pressed and fixed to B _1, FIG. 4 is a drive shaft B ₂ of the small motor a ₂ into the mounting hole D ₂ to form the eccentric vibrator C ₂ of the mounting portion c formed of the same material directly This is a structure in which the mounting portion c is inserted and the mounting portion c is caulked with a punch hole F later.
[0005]
[Problems to be solved by the invention]
However, among these conventional shaker, the structure shown in FIG. 3, since the brass bushing E is firmly pressed into the drive shaft B ₁ small motors A _1, although a sufficient fixing strength can be maintained since bonding the same brass bushing E into the mounting hole D ₁ of the eccentric vibrators C _1, requires a time the adhesive is solidified, the process time becomes long, not suitable for rapid production, the use of brass bushing E There was a problem that the parts cost became expensive.
The structure shown in FIG. 4 can be quickly assembled with a jig such as a punch. However, since a sharp punch is used, the yield due to cracks or the like is low, and the eccentric vibrator C ₂ is indicated by points p ₁ and p _2. because only in contact with the drive shaft B ₂ at two points, according to the trial results, removal force of approximately 10Kg obtained only, there is a decomposed risk during use.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a small-sized radio paging device having a small number of parts, which can be manufactured in a quick assembling process, and which has a sufficient mounting strength. To get the oscillator.
[0007]
[Means for Solving the Problems]
In order to achieve this object, in the oscillator of the small wireless paging device which inserts and fixes the drive shaft of the small motor in the mounting hole of the eccentric vibrator and applies the incoming vibration to the small wireless paging device, the cross-sectional shape of the mounting hole is reduced. and a four-square cross-section, inscribed in the circumferential surface of the drive shaft in the mounting hole in at least 4 points or more points by caulking the mounting portion of the eccentric vibrators same mounting hole is formed in a diagonal direction of the square It suggests what was done.
[0008]
【Example】
Hereinafter, the embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a front view of an oscillator of a small radio paging device according to the present invention. The vibrator includes a small motor 1 which is excited by energization from a circuit of a paging body (not shown) when an incoming signal is received. It is the same as the conventional one that the mounting portion 2a is composed of the eccentric vibrator 2 having a large specific weight and firmly fixed to the drive shaft 1a of the small motor 1 with a structure described later.
[0009]
A feature of the illustrated embodiment is a mounting hole 3 having a rectangular cross section formed in the mounting portion 2a. After the drive shaft 1a of the small motor 1 is inserted into the mounting hole 3, as shown in FIG. 4, the mounting portion 2a is caulked in the direction of the arrow, that is, in the diagonal direction of the vertex of the mounting hole 3.
[0010]
Of course, the cross-sectional shape of the mounting hole 3 is intended to increase the contact point of the mounting hole 3 with the peripheral surface of the drive shaft 1a, and therefore may be another polygonal cross-sectional shape. The same effect can be obtained even when the direction is caulked from a diagonal direction perpendicular to the arrow.
[0011]
Since the oscillator of the small-sized radio paging device of the illustrated embodiment has the above-described structure, the driving shaft 1a of the small-sized motor 1 is inserted into the mounting hole 3 of the eccentric vibrator 2 so that the caulking portion is not flat. Since the caulking jig 4 is caulked from the diagonal direction of the mounting hole 3, no crack is generated and the assembly can be performed quickly.
Further, as indicated by a solid line in FIG. 2, in a state crimped mounting portion 2a of the eccentric vibrator 2 by caulking jig 4, the peripheral surface of the drive shaft 1a of a point _{_{_{P 1, P 2, P 3}}} , P 4 A state of being inscribed in the mounting hole 3 is obtained at the four points shown.
Therefore, since the eccentric vibrator 2 can be firmly fixed to the drive shaft 1a by such contact at four points, a highly reliable structure in which the eccentric vibrator 2 does not come off from the drive shaft 1a during use is obtained. . In fact, according to the trial production and test results of the illustrated structure (an example in which the eccentric vibrator 2 having a thickness of 4.6 mm was caulked on the drive shaft 1a having an outer diameter of 1 mm), an excellent removal force reaching an average of 18 kg was obtained.
[0012]
【The invention's effect】
As apparent from the above description, according to the present invention, the number of parts is small, the structure is suitable for mass production that can be quickly assembled, and the reliability of the fixing force of the eccentric vibrator to the drive shaft of a small motor is large. It is possible to achieve a small-sized radio paging oscillator with high reliability.
[Brief description of the drawings]
FIG. 1 is a front view of an oscillator of a small paging device of the present invention.
FIG. 2 is an enlarged front view of a main part of the vibrator.
FIG. 3 is an exploded perspective view of the oscillator of the conventional small-sized wireless paging device.
FIG. 4 is a front view of another conventional vibrator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Small motor 1a Drive shaft 2 Eccentric vibrator 2a Mounting part 3 Mounting hole 4 Caulking jig

Claims

偏心振動子の取付孔に小型モータの駆動軸を挿入・固定して、小型無線呼出機に着信振動を加える小型無線呼出機の発振器において、
前記取付孔の断面形状を四角形断面とし、
同取付孔が形成される偏心振動子の取付部を前記四角形の対角方向にカシメることにより少なくとも４点以上の点で前記駆動軸の周面を前記取付孔に内接させたことを特徴とする小型無線呼出機の発振器。In the oscillator of a small wireless paging device that inserts and fixes the drive shaft of a small motor in the mounting hole of the eccentric vibrator and applies incoming vibration to the small wireless paging device,
The cross-sectional shape of the mounting hole and a four-square cross section,
The mounting portion of the eccentric vibrator in which the mounting hole is formed is caulked in a diagonal direction of the square, so that the peripheral surface of the drive shaft is inscribed in the mounting hole at least at four or more points. Oscillator of a small wireless paging device.