JPH06331004A - Gear train mechanism - Google Patents
Gear train mechanismInfo
- Publication number
- JPH06331004A JPH06331004A JP11966393A JP11966393A JPH06331004A JP H06331004 A JPH06331004 A JP H06331004A JP 11966393 A JP11966393 A JP 11966393A JP 11966393 A JP11966393 A JP 11966393A JP H06331004 A JPH06331004 A JP H06331004A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- diameter
- parts
- component
- sub
- 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.)
- Withdrawn
Links
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- Gear Transmission (AREA)
- Gears, Cams (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えばレーザディスク
プレーヤ、コンパクトディスク（ＣＤ）プレーヤ、ＣＤ
−ＲＯＭ再生装置のピックアップ送り機構等に用いられ
る歯車列機構に関する。BACKGROUND OF THE INVENTION The present invention relates to, for example, a laser disc player, a compact disc (CD) player, and a CD.
-A gear train mechanism used for a pickup feeding mechanism of a ROM reproducing device.
【０００２】[0002]
【従来の技術】近年、レーザディスクプレーヤ、コンパ
クトディスク（ＣＤ）プレーヤ、ＣＤ−ＲＯＭ再生装置
等、ピックアップを用いて光ディスクから信号を読み取
る種々の装置が開発されている。このような装置には、
ピックアップを光ディスクの半径方向に移動させるため
のピックアップ送り機構が備えられている。2. Description of the Related Art In recent years, various devices such as a laser disc player, a compact disc (CD) player, and a CD-ROM reproducing device for reading a signal from an optical disc using a pickup have been developed. Such devices include
A pickup feed mechanism is provided for moving the pickup in the radial direction of the optical disc.
【０００３】このピックアップ送り機構は、例えば図６
に示すように、送りモータ１と歯車列２、３、４、５、
６から構成される。ここで６はラックギアである。この
ラックギア６は一対のガイド軸７、８に沿ってスライド
移動可能に支持されたピックアップ９と一体的に連結さ
れ、歯車列２、３、４、５を介して伝達される送りモー
タ１の回転力によってピックアップ９と共に矢印Ａ、
Ａ′方向に移動される。ところで、このように歯車列を
用いてピックアップ送り機構を構成した場合、歯車間に
バックラッシュ（伝達する側の歯車の歯先と、この歯先
と当接される、伝達される側の歯車の歯先との隙間）が
あると、送りモータ１の回転量とピックアップ９の送り
量との間に誤差が生じ、この誤差を修正するための時間
が必要となってピックアップ９の移動制御時間が全体的
に長くなってかかってしまう。This pickup feed mechanism is shown in FIG.
, The feed motor 1 and the gear trains 2, 3, 4, 5,
It consists of 6. Here, 6 is a rack gear. The rack gear 6 is integrally connected to a pickup 9 that is slidably supported along a pair of guide shafts 7 and 8, and the rotation of the feed motor 1 is transmitted via gear trains 2, 3, 4, and 5. Arrow A with pickup 9 by force,
It is moved in the A'direction. By the way, in the case where the pickup feed mechanism is configured by using the gear train as described above, there is a backlash between the gears (the tip of the gear on the transmitting side and the tip of the gear on the transmitting side that is in contact with the tooth tip). If there is a gap between the tooth tip, an error occurs between the rotation amount of the feed motor 1 and the feed amount of the pickup 9, and time is required to correct this error, and the movement control time of the pickup 9 is required. It takes longer as a whole.
【０００４】そこで従来、次のようなバックラッシュ解
消型の歯車列機構が用いられている。図７は図６におけ
る歯車４と歯車５の構造を詳細に示した平面図および断
面図である。Therefore, conventionally, the following backlash eliminating type gear train mechanism has been used. FIG. 7 is a plan view and a cross-sectional view showing in detail the structure of the gear 4 and the gear 5 in FIG.
【０００５】同図に示すように、歯車４（以下、第１の
歯車４と呼ぶ。）は径および歯数の異なる二段一体の歯
車部（以下、径の大きい方を大径歯車部４ａ、径の小さ
い方を小径歯車部４ｂと呼ぶ。）からなっている。一
方、歯車５（以下、第２の歯車５と呼ぶ。）は図８にも
示すように、その大径部分で歯車板厚方向に二分割され
た２つの歯車部品（以下、サブ歯車部品５１、メイン歯
車部品５２と呼ぶ。）からなっている。メイン歯車部品
５２は第１の歯車４と同様、大径歯車部５２ａと小径歯
車部５２ｂからなり、大径歯車部５２ａは第１の歯車４
の小径歯車部４ｂと噛合している。また他方の歯車部品
５１も第１の歯車４の小径歯車部４ｂと噛合している。As shown in the figure, the gear 4 (hereinafter referred to as the first gear 4) is a two-step integrated gear portion having different diameters and numbers of teeth (hereinafter, the larger diameter portion is the large diameter gear portion 4a). , Which has a smaller diameter is referred to as a small-diameter gear portion 4b). On the other hand, as shown in FIG. 8, the gear 5 (hereinafter referred to as the second gear 5) is divided into two gear parts (hereinafter referred to as the sub gear part 51) whose large diameter portion is divided into two in the gear plate thickness direction. , Main gear component 52). Like the first gear 4, the main gear component 52 includes a large-diameter gear portion 52a and a small-diameter gear portion 52b, and the large-diameter gear portion 52a includes the first gear 4
Meshes with the small-diameter gear portion 4b. The other gear component 51 also meshes with the small-diameter gear portion 4b of the first gear 4.
【０００６】各歯車部品５１、５２にはそれぞれ圧縮バ
ネ１０を収容するためのバネ収容穴部５１ｃ、５２ｃが
設けられており、このバネ収容穴部５１ｃ、５２ｃに収
容された圧縮バネ１０の両端は、各バネ収容穴部５１
ｃ、５２ｃの各一端に設けられたバネ支持部５１ｄ、５
２ｄによって支持されている。これにより各歯車部品５
１、５２は圧縮バネ１０の圧縮力によって互いに反対方
向に回転付勢されている。またメイン歯車部品５２とサ
ブ歯車部品５１との間における回転角度範囲は、各歯車
部品５１、５２にそれぞれ３か所ずつ設けたストッパー
部５１ｅ、５２ｅによって規制されている。The gear parts 51, 52 are provided with spring accommodating holes 51c, 52c for accommodating the compression spring 10, respectively, and both ends of the compression spring 10 accommodated in the spring accommodating holes 51c, 52c. Is each spring accommodation hole 51
spring support parts 51d, 5 provided at one end of each of c, 52c.
It is supported by 2d. As a result, each gear component 5
1 and 52 are rotationally biased in opposite directions by the compression force of the compression spring 10. Further, the rotation angle range between the main gear component 52 and the sub gear component 51 is restricted by stopper portions 51e and 52e provided at three places on each gear component 51 and 52.
【０００７】この歯車列機構によれば、第１の歯車４か
ら第２の歯車５への動力伝達を開始するまで、圧縮バネ
１０の圧縮力によって第２の歯車５の各歯車部品５１、
５２が互いに反対方向に回転付勢されることで、メイン
歯車部品５２の大径歯車部５２ａとサブ歯車部品５１の
各歯先を第１の歯車４の歯先とそれぞれ回転両方向から
当接させた状態に保持することができる。According to this gear train mechanism, each gear component 51 of the second gear 5 is compressed by the compression force of the compression spring 10 until the power transmission from the first gear 4 to the second gear 5 is started.
When 52 is rotationally biased in opposite directions, the large-diameter gear portion 52a of the main gear component 52 and the tooth tips of the sub gear component 51 are brought into contact with the tooth tips of the first gear 4 from both rotational directions. Can be kept in a closed state.
【０００８】したがって、第１の歯車４が矢印Ｒ′方向
に回転する場合は、メイン歯車部品５２の大径歯車部５
２ａを通じて第１の歯車４の回転を即座に第２の歯車５
に伝達することができる。また、第１の歯車４が逆に矢
印Ｒ方向に回転する場合は、サブ歯車部品５１を通しで
第１の歯車４の回転を第２の歯車５に即座に伝達するこ
とができる。すなわち、このときサブ歯車部品５１のメ
イン歯車部品５２に対する矢印Ｒ′方向への回転は、各
歯車部品５１、５２に設けたストッパー部５１ｅ、５２
ｅの当接によって規制されているため、第１の歯車４よ
りサブ歯車部品５１に伝達された回転力は即座にメイン
歯車部品５２に伝達され、メイン歯車部品５２の小径歯
車部５２ｂを通じて次の歯車（ラックギア）６に伝達さ
れる。これにより前述したバックラッシュの問題は改善
される。Therefore, when the first gear 4 rotates in the direction of arrow R ', the large-diameter gear portion 5 of the main gear component 52 is provided.
The rotation of the first gear 4 is immediately transmitted through the second gear 5a through the second gear 5a.
Can be transmitted to. When the first gear 4 reversely rotates in the direction of arrow R, the rotation of the first gear 4 can be immediately transmitted to the second gear 5 through the sub gear component 51. That is, at this time, the rotation of the sub gear part 51 with respect to the main gear part 52 in the direction of the arrow R ′ is caused by the stopper portions 51 e, 52 provided on the respective gear parts 51, 52.
Since it is regulated by the contact of e, the rotational force transmitted from the first gear 4 to the sub gear component 51 is immediately transmitted to the main gear component 52, and is transmitted through the small-diameter gear portion 52b of the main gear component 52 to the next position. It is transmitted to the gear (rack gear) 6. This improves the backlash problem described above.
【０００９】しかしながら、前記バックラッシュの解消
構造では、圧縮バネ１０を収容するためのスペースを各
歯車部品５１、５２の内部に確保する必要があるため、
二段歯車をその大径部分で二分割する場合の採用は可能
であっても、小径部分で二分割するような場合に不適当
である。However, in the backlash elimination structure, it is necessary to secure a space for accommodating the compression spring 10 inside each of the gear parts 51 and 52.
Although it is possible to employ the two-step gear when the large-diameter portion is divided into two, it is unsuitable when the small-diameter portion is divided into two.
【００１０】[0010]
【発明が解決しようとする課題】このように、従来から
歯車列機構に用いられるバックラッシュの解消構造は、
歯車をその大径部分で二分割する場合の採用は可能であ
っても、小径部分で二分割するような場合は、圧縮バネ
等のバネ部材を収容するスペースを確保できないため、
その採用が難しいと言う問題があった。As described above, the backlash elimination structure conventionally used in the gear train mechanism is as follows.
Even if it is possible to adopt a case where the gear is divided into two parts with a large diameter, it is not possible to secure a space for accommodating a spring member such as a compression spring when the gear part is divided into two parts with a small diameter.
There was a problem that it was difficult to recruit.
【００１１】本発明はこのような課題を解決するための
もので、それぞれ径および歯数の異なる大径歯車部と小
径歯車部とを有する歯車（第１の歯車）を、その小径部
分で二分割する場合に適したバックラッシュ解消型の歯
車列機構の提供を目的としている。The present invention is intended to solve such a problem, and a gear (first gear) having a large-diameter gear portion and a small-diameter gear portion, each having a different diameter and number of teeth, is provided. The purpose is to provide a gear train mechanism that eliminates backlash and is suitable for division.
【００１２】[0012]
【課題を解決するための手段】本発明の歯車列機構は上
記した目的を達成するために、互いに回転自在な状態で
歯車厚方向にメイン歯車部品とサブ歯車部品とに二分割
され、且つ、前記メイン歯車部品は前記サブ歯車部品と
径および歯数が等しい小径歯車部とこの小径歯車部より
径および歯数の大きい大径歯車部と前記小径歯車部およ
び前記大径歯車部に貫通して設けられた中空部とを有
し、前記サブ歯車部品は前記メイン歯車部品の前記中空
部に挿入される軸部を有する第１の歯車と、前記メイン
歯車部品の小径歯車部および前記サブ歯車部品とそれぞ
れ噛合する第２の歯車と、前記第１の歯車の前記サブ歯
車部品の前記軸部にこれと一体で回転するよう固定さ
れ、且つ、前記サブ歯車部品の外周面から平面上突出し
た複数の突出部を有する回転板と、前記各歯車部品の間
でそれぞれ反対方向の回転付勢力が働くよう、前記回転
板に設けたひとつの前記突出部と前記大径歯車部の外周
部近傍の所定位置との間に接続されたバネ部材と、前記
第１の歯車のメイン歯車部品の大径歯車部に設けられ、
前記回転板に設けた他の前記突出部と当接することで、
前記バネ部材による回転付勢力に逆らって前記各歯車部
品間の回転を規制する回転規制部とを具備している。In order to achieve the above-mentioned object, a gear train mechanism of the present invention is divided into two main gear parts and sub gear parts in the gear thickness direction in a freely rotatable state, and The main gear part has a small diameter gear part having the same diameter and the same number of teeth as the sub gear part, a large diameter gear part having a larger diameter and a larger number of teeth than the small diameter gear part, and the small diameter gear part and the large diameter gear part. A first gear having a hollow portion provided therein, the sub gear component having a shaft portion inserted into the hollow portion of the main gear component, a small diameter gear component of the main gear component, and the sub gear component. A plurality of second gears respectively meshing with the first gear, the plurality of second gears fixed to the shaft portion of the sub gear component of the first gear so as to rotate integrally therewith, and projecting in a plane from the outer peripheral surface of the sub gear component. Has a protrusion Between the rotating plate and one of the protrusions provided on the rotating plate and a predetermined position in the vicinity of the outer peripheral portion of the large-diameter gear part, so that rotational biasing forces in opposite directions act between the rotating plate and the respective gear parts. A connected spring member and a large-diameter gear portion of the main gear component of the first gear,
By abutting against the other protrusion provided on the rotating plate,
And a rotation restricting portion that restricts rotation between the gear parts against the rotational biasing force of the spring member.
【００１３】[0013]
【作用】本発明では、各歯車部品をそれぞれ反対方向に
回転付勢するためのバネ部材の両端を、サブ歯車部品の
軸部に固定された回転板の突出部と、メイン歯車部品の
大径歯車部の外周部近傍の所定位置とで支持し、且つ、
メイン歯車部品の大径歯車部に設けられた回転規制部と
回転板に設けた他の突出部との当接によって、バネ部材
による回転付勢力に逆らって各歯車部品間の回転を規制
するようにした。これにより、第１の歯車から第２の歯
車への動力伝達を開始するまで、第１の歯車のメイン歯
車部品の小径歯車部とサブ歯車部品の各歯先部を、第２
の歯車の歯先部とそれぞれ回転両方向から当接させた状
態に保持することができ、第１の歯車をその小径部分で
二分割した場合に適したバックラッシュ解消型の歯車列
機構を実現することができる。According to the present invention, both ends of the spring member for urging the respective gear parts to rotate in opposite directions are provided with the projecting portion of the rotary plate fixed to the shaft portion of the sub gear part and the large diameter of the main gear part. Supported at a predetermined position near the outer periphery of the gear, and
By abutting the rotation restriction part provided on the large-diameter gear part of the main gear part and the other projection part provided on the rotary plate, the rotation between the gear parts is restricted against the rotational biasing force of the spring member. I chose Thus, until the power transmission from the first gear to the second gear is started, the small-diameter gear part of the main gear part of the first gear and the tip parts of the sub gear parts are
A gear train mechanism that can be held in contact with the tooth tips of the gear from both directions of rotation, and is suitable for a case where the first gear is divided into two parts with a small diameter portion. be able to.
【００１４】[0014]
【実施例】以下、本発明に係る実施例を図面に基づき説
明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１５】図１は本発明に係る一実施例の歯車列機構
の構成を示す平面図および断面図である。同図に示す歯
車列機構は、例えば図２に示すピックアップ送り機構に
おける歯車１３と歯車１４とからなる歯車列に採用され
ている。なお、図２のその他の部分の構成は従来例で説
明した図６と同じであり、それぞれ共通する部分には対
応する符号を付して重複する説明は省略する。FIG. 1 is a plan view and a sectional view showing the structure of a gear train mechanism of an embodiment according to the present invention. The gear train mechanism shown in the figure is employed in a gear train composed of the gear 13 and the gear 14 in the pickup feed mechanism shown in FIG. 2, for example. The configuration of the other parts of FIG. 2 is the same as that of FIG. 6 described in the conventional example, the common parts are denoted by the corresponding reference numerals, and the overlapping description will be omitted.
【００１６】図１に示すように、歯車１４（以下、第２
の歯車１４と呼ぶ。）は径および歯数の異なる二段一体
の歯車部（以下、径の大きい方を大径歯車部１４ａ、径
の小さい方を小径歯車部１４ｂと呼ぶ。）からなってい
る。一方、歯車１３（以下、第１の歯車１３と呼ぶ。）
は図３にも示すように、その小径部分で歯車板厚方向に
二分割された２つの歯車部品（以下、サブ歯車部品１３
１、メイン歯車部品１３２と呼ぶ。）からなっている。As shown in FIG. 1, the gear 14 (hereinafter referred to as the second gear
The gear 14 is called. 2) is composed of two-stage integrated gear portions having different diameters and the number of teeth (hereinafter, the larger diameter portion is referred to as the large diameter gear portion 14a and the smaller diameter portion is referred to as the small diameter gear portion 14b). On the other hand, the gear 13 (hereinafter referred to as the first gear 13).
As shown in FIG. 3, two small gear parts are divided into two in the thickness direction of the gear plate (hereinafter referred to as the sub gear part 13).
1. Main gear component 132. ).
【００１７】メイン歯車部品１３２は第２の歯車１４と
同様、それぞれ径および歯数の異なる大径歯車部１３２
ａと小径歯車部１３２ｂとからなり、小径歯車部１３２
ｂは第２の歯車１４の大径歯車部１４ａと噛合してい
る。またサブ歯車部品１３１も第２の歯車１４の大径歯
車部１４ａと噛合している。The main gear part 132, like the second gear 14, has a large-diameter gear portion 132 having different diameters and different numbers of teeth.
a and the small-diameter gear portion 132b, the small-diameter gear portion 132
b is in mesh with the large-diameter gear portion 14a of the second gear 14. The sub gear part 131 also meshes with the large-diameter gear portion 14a of the second gear 14.
【００１８】さらにメイン歯車部品１３２の大径歯車部
１３２ａは、その一端面を外周部を除いた範囲で平らに
凹ませてある。そしてメイン歯車部品１３２に設けられ
た中心穴１３２ｃにはサブ歯車部品１３１の軸部１３１
ｃが挿入され、その軸部先端部は大径歯車部１３２ａの
前記凹部１３２ｅより僅かに突出させてある。またこの
サブ歯車部品１３１の軸部先端部には薄板状の回転レバ
ー２１がサブ歯車部品１３１と一体で回転するよう固定
されている。Further, the large-diameter gear portion 132a of the main gear component 132 has one end surface flatly recessed in the range excluding the outer peripheral portion. Then, in the central hole 132c provided in the main gear component 132, the shaft portion 131 of the sub gear component 131 is formed.
c is inserted, and the tip of the shaft portion is slightly projected from the recess 132e of the large-diameter gear portion 132a. Further, a rotary lever 21 in the form of a thin plate is fixed to the tip of the shaft portion of the sub gear component 131 so as to rotate integrally with the sub gear component 131.
【００１９】この回転レバー２１には、メイン歯車部品
１３２の小径歯車部１３２ｂ外周からそれぞれ平面上突
出させたかたちでバネ支持用突起部２１ａおよび回転規
制用突起部２１ｂが設けられている。バネ支持用突起部
２１ａには、各歯車部品１３１、１３２をそれぞれ反対
方向に回転付勢するための引張りバネ２２の一端が支持
されている。また引張りバネ２２の他端は、大径歯車部
１３２ａの前記凹部１３２ｅの内周面の所定位置に設け
られたバネ支持部１３２ｄに支持されている。なお、メ
イン歯車部品１３２の大径歯車部１３２ａには引張りバ
ネ２２を配置するためのバネ収容穴部１３２ｆが設けら
れている。The rotary lever 21 is provided with a spring-supporting projection 21a and a rotation-regulating projection 21b which are projected in a plane from the outer circumference of the small-diameter gear portion 132b of the main gear part 132. The spring supporting protrusion 21a supports one end of a tension spring 22 for rotationally biasing the gear parts 131 and 132 in opposite directions. The other end of the tension spring 22 is supported by a spring support portion 132d provided at a predetermined position on the inner peripheral surface of the recess 132e of the large diameter gear portion 132a. The large-diameter gear portion 132a of the main gear component 132 is provided with a spring accommodating hole portion 132f for disposing the tension spring 22.
【００２０】さらにメイン歯車部品１３２の大径歯車部
１３２ａにおける前記凹部１３２ｅの下面の所定位置に
は、図４にも示すように、回転レバー２１の回転規制用
突起部２１ｂと当接して、メイン歯車部品１３２に対す
るサブ歯車部品１３１の回転規制を行うためのストッパ
ー２３が設けられている。Further, at a predetermined position on the lower surface of the recess 132e in the large-diameter gear portion 132a of the main gear part 132, as shown in FIG. A stopper 23 is provided for restricting rotation of the sub gear component 131 with respect to the gear component 132.
【００２１】以上のように構成された歯車機構におい
て、第１の歯車１３におけるメイン歯車部品１３２とサ
ブ歯車部品１３１との間には引張りバネ２２の力による
互いに反対方向の回転付勢力が働く。これにより図５に
示すように、第１の歯車１３から第２の歯車１４への動
力伝達を開始するまで、第１の歯車１３のメイン歯車部
品１３２の小径歯車部１３２ｂとサブ歯車部品１３１の
歯先部を、第２の歯車１４の歯先部とそれぞれ回転両方
向から当接させた状態に保持することができる。第１の
歯車１３は送りモータ１１の動力を歯車１２を通じてメ
イン歯車部品１３２の大径歯車部１３２ａで直接受けて
いるため、第１の歯車１３が矢印Ｒ′方向に回転する場
合は、メイン歯車部品１３２の小径歯車部１３２ｂを通
じて第１の歯車１３の回転を即座に第２の歯車１４に伝
達することができる。In the gear mechanism configured as described above, rotational biasing forces in opposite directions due to the force of the tension spring 22 act between the main gear part 132 and the sub gear part 131 in the first gear 13. As a result, as shown in FIG. 5, until the power transmission from the first gear 13 to the second gear 14 is started, the small diameter gear portion 132b of the main gear component 132 of the first gear 13 and the sub gear component 131 are The addendum portions can be held in contact with the addendum portions of the second gear 14 from both rotational directions. Since the first gear 13 receives the power of the feed motor 11 directly through the gear 12 by the large-diameter gear portion 132a of the main gear component 132, when the first gear 13 rotates in the arrow R'direction, The rotation of the first gear 13 can be immediately transmitted to the second gear 14 through the small-diameter gear portion 132b of the component 132.
【００２２】また、第１の歯車１３が逆に矢印Ｒ方向に
回転する場合は、サブ歯車部品１３１を通して第１の歯
車１３の回転を第２の歯車１４に即座に伝達することが
できる。すなわち、サブ歯車部品１３１のメイン歯車部
品１３２に対する矢印Ｒ方向への回転は、大径歯車部１
３２ａに設けたストッパー２３と回転レバー２１の回転
規制部２１ｂとの当接によって規制された状態にあるた
め、歯車１２を通じてメイン歯車部品１３２に伝達され
た矢印Ｒ方向の回転力は即座にサブ歯車部品１３１に伝
達され、このサブ歯車部品１３１から第２の歯車１４に
伝達される。When the first gear 13 rotates in the direction of arrow R, the rotation of the first gear 13 can be immediately transmitted to the second gear 14 through the sub gear part 131. That is, the rotation of the sub gear part 131 with respect to the main gear part 132 in the direction of the arrow R causes the large diameter gear part 1 to rotate.
Since the stopper 23 provided at 32a and the rotation restricting portion 21b of the rotary lever 21 are in contact with each other, the rotational force in the arrow R direction transmitted to the main gear component 132 through the gear 12 is immediately sub-geared. It is transmitted to the component 131 and transmitted from the sub gear component 131 to the second gear 14.
【００２３】かくして本実施例の歯車列機構によれば、
第１の歯車１３をその小径部分で歯車板厚方向に二分割
した場合のバックラッシュ解消構造を実現でき、これを
レーザディスクプレーヤ、コンパクトディスク（ＣＤ）
プレーヤ、ＣＤ−ＲＯＭ再生装置等のピックアップ送り
機構に用いることで、送りモータ１１の回転量とピック
アップ１９の送り量との誤差の縮小化を図れる。Thus, according to the gear train mechanism of this embodiment,
It is possible to realize a backlash elimination structure when the first gear 13 is divided into two parts in the thickness direction of the gear plate at the small diameter part thereof, which is a laser disc player or a compact disc (CD).
By using it in a pickup feed mechanism such as a player or a CD-ROM reproducing device, it is possible to reduce the error between the rotation amount of the feed motor 11 and the feed amount of the pickup 19.
【００２４】[0024]
【発明の効果】以上説明したように本発明によれば、そ
れぞれ径および歯数の異なる大径歯車部と小径歯車部と
を有する歯車（第１の歯車）を、その小径部分で二分割
した場合に適したバックラッシュ解消型の歯車列機構を
実現することができる。As described above, according to the present invention, a gear (first gear) having a large-diameter gear portion and a small-diameter gear portion, each having a different diameter and number of teeth, is divided into two by the small-diameter portion. It is possible to realize a gear train mechanism that eliminates backlash and is suitable for each case.
【図１】本発明に係る一実施例の歯車列機構の構成を示
す平面図および断面図である。FIG. 1 is a plan view and a cross-sectional view showing a configuration of a gear train mechanism according to an embodiment of the present invention.
【図２】図１の歯車列機構を採用したピックアップ送り
機構の構成を示す平面図である。FIG. 2 is a plan view showing the configuration of a pickup feed mechanism that employs the gear train mechanism of FIG.
【図３】図１における第１の歯車の分解図である。3 is an exploded view of the first gear in FIG. 1. FIG.
【図４】図１におけるＸ−Ｘ′断面図である。FIG. 4 is a sectional view taken along line XX ′ in FIG.
【図５】第１の歯車のメイン歯車部品の小径歯車部およ
びサブ歯車部品の各歯先部と第２の歯車の歯先部との噛
合状態を示す図である。FIG. 5 is a diagram showing a meshing state between the tooth tips of the small-diameter gear portion of the main gear component and the sub gear component of the first gear and the tooth tips of the second gear.
【図６】従来の歯車列機構を採用したピックアップ送り
機構の構成を示す平面図である。FIG. 6 is a plan view showing a configuration of a pickup feed mechanism that employs a conventional gear train mechanism.
【図７】図６のピックアップ送り機構に用いられるバッ
クラッシュ解消型の歯車列機構を示す平面図および断面
図である。7A and 7B are a plan view and a cross-sectional view showing a backlash eliminating type gear train mechanism used in the pickup feeding mechanism of FIG.
【図８】図６における第２の歯車の分解図である。8 is an exploded view of the second gear in FIG.
１３…第１の歯車、１４…第２の歯車、１４ａ…第２の
歯車の大径歯車部、１４ｂ…第２の歯車の小径歯車部、
１３１…サブ歯車部品、１３１ｃ…軸部、１３２…メイ
ン歯車部品、１３２ａ…メイン歯車部品の大径歯車部、
１３２ｂ…メイン歯車部品の小径歯車部、１３２ｄ…バ
ネ支持部、１３２ｃ…中心穴、１３２ｅ…凹部、１３２
ｆ…バネ収容穴部、２１…回転レバー、２１ａ…バネ支
持用突起部、２１ｂ…回転規制用突起部、２２…引張り
バネ、２３…ストッパー。13 ... 1st gear, 14 ... 2nd gear, 14a ... 2nd gear's large diameter gear part, 14b ... 2nd gear's small diameter gear part,
131 ... Sub gear part, 131c ... Shaft part, 132 ... Main gear part, 132a ... Large diameter gear part of main gear part,
132b ... Small diameter gear part of main gear part, 132d ... Spring support part, 132c ... Center hole, 132e ... Recessed part, 132
f ... Spring accommodating hole, 21 ... Rotating lever, 21a ... Spring supporting projection, 21b ... Rotation restricting projection, 22 ... Tension spring, 23 ... Stopper.
Claims (1)
イン歯車部品とサブ歯車部品とに二分割され、且つ、前
記メイン歯車部品は前記サブ歯車部品と径および歯数が
等しい小径歯車部とこの小径歯車部より径および歯数の
大きい大径歯車部と前記小径歯車部および前記大径歯車
部に貫通して設けられた中空部とを有し、前記サブ歯車
部品は前記メイン歯車部品の前記中空部に挿入される軸
部を有する第１の歯車と、 前記メイン歯車部品の小径歯車部および前記サブ歯車部
品とそれぞれ噛合する第２の歯車と、 前記第１の歯車の前記サブ歯車部品の前記軸部にこれと
一体で回転するよう固定され、且つ、前記サブ歯車部品
の外周面から平面上突出した複数の突出部を有する回転
板と、 前記各歯車部品の間でそれぞれ反対方向の回転付勢力が
働くよう、前記回転板に設けたひとつの前記突出部と前
記大径歯車部の外周部近傍の所定位置との間に接続され
たバネ部材と、 前記第１の歯車のメイン歯車部品の大径歯車部に設けら
れ、前記回転板に設けた他の前記突出部と当接すること
で、前記バネ部材による回転付勢力に逆らって前記各歯
車部品間の回転を規制する回転規制部とを具備すること
を特徴とする歯車列機構。1. A small-gear gear part, which is rotatably mutually divided into two parts, a main gear part and a sub-gear part in the gear thickness direction, and wherein the main gear part has a small-diameter gear part having the same diameter and the same number of teeth as the sub-gear part. The large-diameter gear portion having a larger diameter and a larger number of teeth than the small-diameter gear portion, and the hollow portion provided through the small-diameter gear portion and the large-diameter gear portion, and the sub-gear component is the main gear component. A first gear having a shaft portion inserted into the hollow portion; a second gear that meshes with the small-diameter gear portion of the main gear component and the sub gear component; and the sub gear component of the first gear. A rotary plate that is fixed to the shaft portion so as to rotate integrally therewith, and that has a plurality of projecting portions that project in a plane from the outer peripheral surface of the sub gear component; Rotational force works The spring member connected between one of the protrusions provided on the rotary plate and a predetermined position near the outer peripheral portion of the large-diameter gear portion, and the large-diameter portion of the main gear component of the first gear. A rotation restricting portion that is provided on the gear portion and that abuts on the other protruding portion provided on the rotary plate to restrict rotation between the gear components against the rotational biasing force of the spring member. A gear train mechanism characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11966393A JPH06331004A (en) | 1993-05-21 | 1993-05-21 | Gear train mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11966393A JPH06331004A (en) | 1993-05-21 | 1993-05-21 | Gear train mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06331004A true JPH06331004A (en) | 1994-11-29 |
Family
ID=14766991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11966393A Withdrawn JPH06331004A (en) | 1993-05-21 | 1993-05-21 | Gear train mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06331004A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012086055A (en) * | 2011-12-28 | 2012-05-10 | Universal Entertainment Corp | Game machine |
| WO2013134086A1 (en) * | 2012-03-05 | 2013-09-12 | Caterpillar Inc. | Scissors gear assembly |
-
1993
- 1993-05-21 JP JP11966393A patent/JPH06331004A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012086055A (en) * | 2011-12-28 | 2012-05-10 | Universal Entertainment Corp | Game machine |
| WO2013134086A1 (en) * | 2012-03-05 | 2013-09-12 | Caterpillar Inc. | Scissors gear assembly |
| US9010209B2 (en) | 2012-03-05 | 2015-04-21 | Caterpillar Inc. | Scissors gear assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000801 |