JPS6082941A - Optical axis adjusting device of head lamp - Google Patents

Optical axis adjusting device of head lamp

Info

Publication number
JPS6082941A
JPS6082941A JP19090383A JP19090383A JPS6082941A JP S6082941 A JPS6082941 A JP S6082941A JP 19090383 A JP19090383 A JP 19090383A JP 19090383 A JP19090383 A JP 19090383A JP S6082941 A JPS6082941 A JP S6082941A
Authority
JP
Japan
Prior art keywords
optical axis
switch
switches
motor
switched
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.)
Pending
Application number
JP19090383A
Other languages
Japanese (ja)
Inventor
Kunihiro Saito
斎藤　邦弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ichikoh Industries Ltd
Original Assignee
Ichikoh Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ichikoh Industries Ltd filed Critical Ichikoh Industries Ltd
Priority to JP19090383A priority Critical patent/JPS6082941A/en
Priority to DE198484112319T priority patent/DE138217T1/en
Priority to DE8484112319T priority patent/DE3469001D1/en
Priority to EP84112319A priority patent/EP0138217B1/en
Priority to US06/660,100 priority patent/US4533860A/en
Publication of JPS6082941A publication Critical patent/JPS6082941A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties
    • G01M11/06—Testing the alignment of vehicle headlight devices

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

PURPOSE:To reduce a temperature variation and a secular change by using a combination of switches in order to detect a direction of an optical axis, and using a motor provided with a field winding of a forward rotation and a backward rotation. CONSTITUTION:In case a load is applied to the rear part of a vehicle, a selecting switch 6 is switched by selecting a scale in accordance with a degree of the load in order to prevent an optical axis of a head lamp from turning upward. When ''0'' is switched to ''1'', a + power source passes through reverse current preventing diodes 2 and 8 from a terminal 1 of the selecting switch, and it is connected to a forward rotation (backward rotation) field winding of a right motor 3 and a left motor 9 through switches B and B', therefore, right and left motors rotate forward (backward), and the optical axis is varied in the lower direction. A slide contact of optical axis detecting switches 1 and 7 moves to a position ''1'' from a position ''0'', and when it reaches ''1'', switches B and B' become off, no current flows to motors 3 and 9, and they stop. However the selecting switch may be switched, the optical axis is varied to a position corresponding to a switching scale of the selecting switch in the same way.

Description

【発明の詳細な説明】 この発明は、車輛の前照灯の光軸を、積載荷重に応じて
ツマミを操作して調整する装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the optical axis of a vehicle headlamp by operating a knob according to the load on the vehicle.

従来の前照灯の光軸調整装置としては、例えば第１図に
示すようなものがある。ポテンションメーター１（■ｌ
）はツマミを操作することにより切替わる。ポテンショ
ンメーター２　（ＶＰ、２）は前照灯の光軸の変化に応
じて切替わる。３は比較回路で、ポテンションメーター
１とポテンションメーター２の出力電圧を比較しその結
果を出力する。４はモーター駆動回路で、前記比較回路
の比較の結果、３ａに出力信号が出れば抵抗（Ｒ１）を
介してトランジスタ（Ｔｒｔ）がオンし、リレー（Ｒｙ
ｔ）が作動して接点ａ１が切替わり電流１１が流れてモ
ーターが正転する。また、　３ｂに出力信号が出れば同
様にして接点ｂ１が切替わり、電流１２が流れてモータ
ーは逆転する。以上のような構成によりツマミを操作す
ると、ポテンションメーター１の出力電圧と、ポテンシ
ョンメーター２の出力電圧とが常に等しくなるようにモ
ーターが回転し、前照灯の光軸が調整できる。しかしな
がら、このような従来の前照灯の光軸調整装置にあって
は、光軸方向検出にポテンションメーターを用いて電圧
を比較する方式となっていたため、ポテンションメータ
ーの温度および経年変化が大きいという問題点がある。As a conventional optical axis adjustment device for a headlamp, there is one shown in FIG. 1, for example. Potentiometer 1 (■l
) can be switched by operating the knob. Potentiometer 2 (VP, 2) switches according to changes in the optical axis of the headlight. 3 is a comparison circuit that compares the output voltages of potentiometer 1 and potentiometer 2 and outputs the result. 4 is a motor drive circuit, and as a result of the comparison by the comparison circuit, if an output signal is output to 3a, a transistor (Trt) is turned on via a resistor (R1), and a relay (Ry
t) is activated, contact a1 is switched, current 11 flows, and the motor rotates forward. Further, when an output signal is output to 3b, contact b1 is switched in the same way, current 12 flows, and the motor rotates in reverse. With the above configuration, when the knob is operated, the motor rotates so that the output voltage of the potentiometer 1 and the output voltage of the potentiometer 2 are always equal, and the optical axis of the headlight can be adjusted. However, in such conventional optical axis adjustment devices for headlights, a potentiometer is used to detect the optical axis direction and the voltage is compared, so the temperature and aging of the potentiometer are The problem is that it is large.

この発明は、このような従来の問題点に着目してなされ
たもので、光軸の方向検出にスイッチの組合せを用い、
正転と逆転の界磁巻線を備えたモーターを使用すること
により、上記問題点を解決することを目的としている。This invention was made by focusing on these conventional problems, and uses a combination of switches to detect the direction of the optical axis.
The purpose of this invention is to solve the above problems by using a motor equipped with forward and reverse field windings.

以下、この発明を図面に基づいて説明する。The present invention will be explained below based on the drawings.

第２図はこの発明の一実施例を示す図である。FIG. 2 is a diagram showing an embodiment of the present invention.

まず構成を説明すると、１は右側前照灯の光軸の変化に
応じて、複数個のスイッチ（Ａ−Ｆ）が順次切替わって
いくようにした光軸検出スイッチで、光軸駆動装置と連
動しており、第４図に示すように、光軸の変化に応じて
同心円上に摺動接点が移動していく。位置　Ｏではスイ
ッチＡ、Ｃ，ＥはＯＦＦ、スイッチＢ、Ｄ、Ｆ１．１ｊ
ＯＮである。位置１　ではスイッチＢ、Ｃ，ＥはＯＦＦ
、スイッチＡ、Ｄ、ＦはＯＮ、位置ｌ′２”ではスイッ
チＢ、Ｄ。First, to explain the configuration, 1 is an optical axis detection switch in which multiple switches (A-F) are switched sequentially according to changes in the optical axis of the right side headlight, and it is connected to an optical axis drive device. As shown in FIG. 4, the sliding contacts move concentrically in response to changes in the optical axis. At position O, switches A, C, and E are OFF, and switches B, D, and F1.1j
It is ON. In position 1, switches B, C, and E are OFF.
, switches A, D, and F are ON, and switches B and D are at position l'2''.

ＥはＯＦＦ、スイッチＡ、Ｃ，ＦはＯＮ、位置ｌ／３′
ではスイッチＢ、Ｄ、ＦはＯＦＦ、スイッチＡ。E is OFF, switches A, C, F are ON, position l/3'
Then switches B, D, and F are OFF, and switch A is OFF.

Ｃ，ＥはＯＮである。なお、スイッチＡは固定接点Ａと
摺動接点ａ、スイッチＢは固定接点Ｂ（！：摺動接点ｂ
、スイッチＣは固定接点Ｃと摺動接点ｂ、スイッチＤは
固定接点りと摺動接点ｄ１スイッチＥは固定接点Ｅと摺
動接点ｄ１スイッチＦは固定接点Ｆと摺動接点ｆより構
成される（第４図参照）２は逆流防止ダイオードで、光
軸検出スイッチの他のスイッチを通って左側のモーター
に電流が流れ誤動作を防止するためのものである。C and E are ON. Note that switch A has fixed contact A and sliding contact a, and switch B has fixed contact B (!: sliding contact b).
, switch C consists of a fixed contact C and a sliding contact b, switch D consists of a fixed contact and a sliding contact d1, switch E consists of a fixed contact E and a sliding contact d1, and switch F consists of a fixed contact F and a sliding contact f. (See Fig. 4) Reference numeral 2 denotes a backflow prevention diode, which is used to prevent malfunction by allowing current to flow to the left motor through the other switches of the optical axis detection switch.

３は正転界磁巻線と逆転界磁巻線の２つの界磁巻線を持
つモーターで、正転界磁巻線に電流が流れるとモーター
は正転し、逆転界磁巻線に電流が流れるとモーターは逆
転する。3 is a motor with two field windings, a forward field winding and a reverse field winding. When current flows through the forward field winding, the motor rotates forward, and current flows through the reverse field winding. When the current flows, the motor reverses.

４は光軸駆動装置で、第５図にその一例を示す。4 is an optical axis driving device, an example of which is shown in FIG.

モーター３の正転（逆転）により、右側前照灯５が動き
光軸が変化するようになっている。As the motor 3 rotates forward (reversely), the right headlight 5 moves and its optical axis changes.

６は選択スイッチで、あらかじめ積載荷重に応じた０〜
３の切替目盛がつけてあり、実際の荷重に応じて適切な
目盛を選択し切替える。コモン端子は十電源に接続され
ており、切替えるこきによりＯ〜３の端子へ十電源が接
続される。前記逆流防止ダイオードは、各端子と光軸検
出スイッチのｍ動接点ａ、ｂ、ｄ、ｆとの間に接続され
ている。6 is a selection switch, 0~ according to the load in advance.
There are 3 switching scales, and the appropriate scale can be selected and switched according to the actual load. The common terminal is connected to the tenth power supply, and the tenth power supply is connected to the terminals O to 3 by switching. The backflow prevention diode is connected between each terminal and the m-movement contacts a, b, d, and f of the optical axis detection switch.

光軸検出スイッチ７、逆流防止ダイオード８、モーター
９．光軸駆動装置１０、前照灯１１は左側用であり、選
択スイッチ６は左右共通である。Optical axis detection switch 7, backflow prevention diode 8, motor 9. The optical axis drive device 10 and the headlight 11 are for the left side, and the selection switch 6 is common to the left and right sides.

この実施例では、０〜３の４か所であるが、０〜２の３
か所でも同様であり、５か所以上でも同様である。In this example, there are four locations from 0 to 3, but there are three locations from 0 to 2.
The same applies to five or more locations.

次に前記の如き構成よりなる本発明の光軸調整装置の作
用を説明する。Next, the operation of the optical axis adjustment device of the present invention having the above-mentioned configuration will be explained.

第２図の実施例は、選択スイッチ６を　Ｏに切替えて光
軸が変化し、光軸検出スイッチの摺動接点が位置　０　
に達して停止した時の状態を示す。In the embodiment shown in FIG. 2, the optical axis is changed by switching the selection switch 6 to O, and the sliding contact of the optical axis detection switch is at position 0.
Indicates the state when it reaches and stops.

車輛後部に荷重が加わった場合、前照灯の光軸が上向き
になるのを防ぐため、選択スイッチ６を荷重の度合いに
応じて目盛を選んで切替える。今０から１へ切替えると
、十電源は選択スイッチの端子ｌから逆流防止ダイオー
ド２および８を通り、スイッチＢおよびＢを経て右側モ
ーター３ならびに左側モーター９の正転（逆転）界磁巻
線に接続されるので、左右のモーターは正（逆）転し光
軸は下方向へ変化していく。光軸検出スイッチ１および
７の摺動接点は、位置　０　から位置　ｌ　に向って移
動し、　ｌ　に到達するとスイッチＢおよびＢ′がＯＦ
Ｆとなりモーター３ならびに９には電流が流れなくなり
停止する。これで選択スイッチ６を０から１に切替える
ことにより、光軸が　１　の位置まで変化したことにな
る。このとき、もし逆流防止ダイオード２および８が無
い場合には、例えばモーター３と９との回転速度が異な
ると、光軸検出スイッチの摺動接点の移動速度も異なり
。When a load is applied to the rear of the vehicle, the selection switch 6 is switched by selecting a scale according to the degree of load in order to prevent the optical axis of the headlight from being directed upward. When switching from 0 to 1 now, the 10 power supply passes from terminal l of the selection switch, passes through reverse current prevention diodes 2 and 8, and passes through switches B and B to the forward (reverse) field windings of right motor 3 and left motor 9. Since they are connected, the left and right motors rotate forward (reverse) and the optical axis changes downward. The sliding contacts of optical axis detection switches 1 and 7 move from position 0 toward position l, and when they reach l, switches B and B' turn OFF.
F, and no current flows through the motors 3 and 9, causing them to stop. Now, by switching the selection switch 6 from 0 to 1, the optical axis has changed to the 1 position. At this time, if the backflow prevention diodes 2 and 8 are not provided, for example, if the rotational speeds of the motors 3 and 9 are different, the moving speed of the sliding contact of the optical axis detection switch will also be different.

右側の光軸検出スイッチ摺動接点が　１　の位置へ達し
たにもか＼わらず、左側の光軸検出スイッチ摺動接点が
未た　０　と　１　の間にある。すると、十電源は選択
スイッチの端子１→スイツチＢ′→スイツチＤ’（スイ
ッチＦ’）→スイッチＤ（スイッチＦ）→モーター３と
なり、すでに　１　の位置へ達している右側の摺動接点
ならびに前照灯は、左側の摺動接点が”１”の位置へ到
達しスイッチＢ′がＯＦＦとなる才で、更に　２　の方
向へ移動を継続し誤動作となる。したがって逆流防止ダ
イオードを設けてこれを防止する。Even though the sliding contact of the right optical axis detection switch has reached the 1 position, the sliding contact of the left optical axis detection switch is still between 0 and 1. Then, the ten power supplies are selected switch terminal 1 → switch B' → switch D' (switch F') → switch D (switch F) → motor 3, and the right sliding contact which has already reached position 1 and the front When the left sliding contact reaches the "1" position and the switch B' is turned off, the light continues to move in the direction of "2", resulting in a malfunction. Therefore, a backflow prevention diode is provided to prevent this.

選択スイッチをどのように切替えても、同様にして選択
スイッチの切替目盛に対応する位置に、光軸検出スイッ
チの摺動接点が移動する。すなわち前照灯の光軸が変化
する。No matter how the selection switch is switched, the sliding contact of the optical axis detection switch similarly moves to a position corresponding to the switching scale of the selection switch. In other words, the optical axis of the headlight changes.

第３図には他の実施例を示す。FIG. 3 shows another embodiment.

この実施例は、２回路の選択スイッチ６を用いて左、右
側々の回路とすることにより、逆流防止ダイオードが不
用となる例を示す。なお、第３図は第２図の実施例と同
一の部分は同一符号を付してその詳細な説明は省略する
。This embodiment shows an example in which a backflow prevention diode is not required by using two circuit selection switches 6 to form left and right circuits. Incidentally, in FIG. 3, the same parts as in the embodiment of FIG. 2 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

第５図は光軸駆動装置の一例を示す構造図である。FIG. 5 is a structural diagram showing an example of an optical axis driving device.

５は前照灯、３はモーターでＡ、Ｂ、Ｃ，Ｄ。5 is the headlight, 3 is the motor, A, B, C, D.

Ｅ、Ｆは第４図に示す光軸検出スイッチの固定接点、ａ
、ｂ、ｄ、ｆは同じく摺動接点を示す。前照灯５の光軸
を変化させたいとき、所望の位置へ第２図ならびに第３
図に示す選択スイッチ６を切替えると、モーター３は正
転または逆転し、歯車機構を介して摺動接点ａ、ｂ、ｄ
、ｆを移動させ、選択スイッチの設定位置の対応する位
置へ変化させるとこれと連動して光軸も変化する。E and F are fixed contacts of the optical axis detection switch shown in Fig. 4, a
, b, d, and f similarly indicate sliding contacts. When you want to change the optical axis of the headlight 5, move it to the desired position in Figures 2 and 3.
When the selection switch 6 shown in the figure is switched, the motor 3 rotates forward or reverse, and the sliding contacts a, b, d are connected through a gear mechanism.
, f to a position corresponding to the setting position of the selection switch, the optical axis also changes in conjunction with this.

以上説明してきたように、この発明によれば、その構成
を複数個のスイッチで構成される光軸検出スイッチを設
け、モーターの正転と逆転との界磁巻線を別個としたた
め、温度変化ならびに経年変化が少なく、極性切替回路
が不用で信頼性の向上が期待できるという効果が得られ
る。As explained above, according to the present invention, an optical axis detection switch consisting of a plurality of switches is provided, and the field windings for forward and reverse rotation of the motor are separate, so that changes in temperature can be avoided. In addition, there is the effect that there is little deterioration over time, no polarity switching circuit is required, and reliability can be expected to be improved.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の光軸調整装置を示す回路図、第２図は本
発明の実施の一例を示す回路図、第３図は他の実施例で
、２回路の選択スイッチを用いた例を示す。第４図は第
２図に示す回路の作用説明図、第５図は機構部の一例を
示す断面図である。 １・・・右側光軸検出スイッチ、２・・・逆流防止ダイ
オード、３・・・界磁巻線モーター、４・・・右側光軸
駆動装置、５・・・右側前照灯、６・・・選択スイッチ
、７・・・左側光軸検出スイッチ、８・・・逆流防止ダ
イオード、９・・・界磁巻線モーター、ｌＯ・・・左側
光軸駆動装置、１１・・・左側前照灯。 特許出願人　市光工業株式会社 代理人　弁理士　秋　本　正　実 第１図 第２図 第３図 第５図 手続補正書（自発） 昭和５９年７月２３日 特許庁長官殿 ■、事件の表示 昭和　５ｇ　年特願　第１ＦＯり０３号２、発明の名称
　前照灯の光軸調整装置３、補正をする者 事件とのＩｓＩ係　特許出願人 化　所　（居Ｊｊｉ）　東京部品用区東万反１」５丁目
１０１む１８８・氏名（名υｊ・）　（０１３）市光工
業株式会社４、代理人 （補正）明　細　書 発明の名称　前照灯の光軸調整装置 特許請求の範囲 １、　モータの回転により車輛の前照灯の光軸の方向を
変化させる光軸駆動装置と、前記前照灯の光軸の方向に
対応して複数の接点が順次切替わる光軸検出スイッチと
、前記車輛に加わる荷重の太き畑に応じて予め設定され
ている選択スイッチと、誤動作を防止する逆流防止ダイ
オードと、正転界備、ｔ　ｆｃ　モーターから構成され
ることを特徴トス７、）前照灯の光軸調整装置。 ２、　光軸方向の一方の限界位置で開成し、他の位置で
は閉成する第１の限界スイッチと、他方の限界位置で開
成し他の位置では閉成する第２の限界スイッチと、各設
定位置で開成し、設定位置の両側でそれぞれ閉成する２
組のスイッチから成る１個以上の位置スイッチとから構
成される光軸検出スイッチを持つことを特徴とする特許
請求の範囲、第１項に記載の前照灯の光軸調整装置。 発明の詳細な説明 この発明は、車輛の前照灯の光軸を、積載荷重に応じて
ツマミを操作して調整する装置に関する。 従来の前照灯の光軸調整装置としては、例えば第１図に
示すようなものがある。ポテンションメーター１（ＶＲ
＋）はツマミを操作することにより切替わる。ポテンシ
ョンメーター２（ＶＨ２）は前照灯の光軸の変化に応じ
て切替わる。３は比較回路で、ポテンションメーター１
とポテンションメーター２の出力電圧を比較しその結果
を出力する。４はモーター、駆動回路で、前記比較回路
の比較の結果、３ａに出力信号が出れば抵抗（Ｒ１）を
介してトランジスタ（Ｔｒ＋　）がオンし、リレー（Ｒ
ｙｚ）が作動して接点Ｉｋｌが切替わ０電流ｉ】が流れ
てモーターが正転する。また、３ｂに出力信号が出れば
同様にして接点ｂ１　が切替わり、電流１２が流れてモ
ーターは逆転する。以上のような構成によりツマミを操
作すると５ポテンシヨンメーター１の出力′電圧と、ポ
テンションメーター２の出力電圧とが常に等しくなるよ
うにモーターが回転し、前照灯の光軸が調整できる。し
かしながら、このような従来の前照灯の光軸調整装置に
あっては、光軸方向検出にポテンションメーターを用い
て電圧を比較する方式となっていたため、ポテンション
メーターの温度および経年変化が大きいという問題点が
ある。 この発明は、このような従来の問題点に着目してす芒れ
たもので、光軸の方向検出にスイッチの組合せを用い、
正転と逆転の界磁（電機子）巻線を備えたモーターを使
用することにより、上記問題点を解決することを目的と
している。 以下、この発明を図面に基づいて説明する。 第２図はこの発明の一実施例を示す図である。 まず構成を説明すると、ｌは右側前照灯の光軸の変化に
応じて、榎数個のスイッチ（Ａ−Ｆ）が順次切替わって
いくようにした光軸検出スイッチで、光軸駆動装置と連
動しており、第４図に示すように、光軸の変化に応じて
同心円上に摺動接点が移動していく。位置ｔｔ　Ｏｎで
はスイッチＡ　、Ｃ、ＥはＯＦＦ　、スイッチＢ　、Ｄ
　、ＦはＯＮである。位置１′″ではスイッチＢ　、Ｃ
、Ｅは（３ＦＦ　、スイッチＡ　、Ｄ　、ＦはＯＮ、位
置“２″ではスイッチＢ。 Ｄ、ＥはＯＦＦ、スイッチＡ　、Ｃ、ＦはＯＮ、位置”
３”ではスイッチＢ　、Ｄ　、ＦはＯＦＦ、スイッチＡ
　、Ｃ、ＢはＯＮである。なお、スイッチＡは固定接点
Ａと摺動接点ａ、スイッチＢは固定接点Ｂと摺動接点ｂ
、スイッチＣは固定接点Ｃと摺動接点ｂ、スイッチＤは
固定接点りと摺動接点ｄ、スイッチＥは固定接点Ｅと摺
動接点ｄ、スイッチＦは固定接点Ｆと摺動接点ｆより構
成きれる（第４図参照）。 ２は逆流防止ダイオードで、光軸検出スイッチの他のス
イッチを通って左側のモーターに電流が流れ誤動作を防
止するためのものである。 ３は正転界磁（電機子）巻線と逆転界磁（電機子）巻線
の２つの界磁（電機子）巻線を持つモーターで、正転界
磁（電機子）巻線に電流が流れるとモーターは正転し、
逆転界磁（電機子）巻線に電流が流れるとモーターは逆
転する。 ４は光軸駆動装置で、第５図にその一例を示す。 モーター３の正転（逆転）により、右側前照灯５が動き
光軸が変化するようになっている。 ６は選択スイッチで、あらかじめ積載荷重に応じたＯ〜
３の切替目盛がつけてあり、実際の荷重に応じて適切な
目盛を選択し切替える。コモン端子は十電源に接続され
ており、切替えることによりＯ〜３の端子へ十電源が接
続される。前記逆流防止ダイオードは、各端子と光軸検
出スイッチの摺動接点ａ　、ｂ　、ｄ　、ｆとの間に接
続されている。 光軸検出スイッチ７、逆流防止ダイオード８、モーター
９、光軸駆動装置Ｌｉ１Ｏ５前照灯１１は左側用であり
、選択スイッチ６は左右共通である。 この実施例では、０〜３の４か所であるが、０〜２の３
か所でも同様であり、５か所以上でも同様である。 次に前記の如き構成エリなる本発明の光軸調整装置の作
用を説明する。 第２図の実施例は、選択スイッチ６をｔｔ　ｏ＋＋に切
替えて光軸が変化し、光軸検出スイッチの摺動接点が位
置Ｉｔ　Ｑ　Ｉｔに達して停止した時の状態を示す。 車幅後部に荷重が加わった場合、前照灯の光軸が上向き
になるのを防ぐため、選択スイッチ６を荷重の度合いに
応じて目盛を選んで切替える。今０から１へ切替えると
、十電源は選択スイッチの端子１から逆流防止ダイオー
ド２および８を通り、スイッチＢおよびＢ′を経て右側
モーター３なラヒに左側モーター９の正転（逆転）界磁
（電機子）巻線に接続されるので、左右のモーターは正
（逆）転じ光軸は下方向へ変化していく。光軸検出スイ
ッチ１および７の摺動接点は、位置（１０”から位置Ｉ
Ｉ　ＩＩＩに向って移動し、”１″に到達するとスイッ
チＢおよびＢ′がＯＦＦとなりモーター３ならびに９に
は電流が流れなくなり停止する。これで選択スイッチ６
を０から１に切替えることにより、光軸がａｔ　１ｒｒ
の位置壕で変化したことになる。このとき、もし逆流防
止ダイオード２および８が無い場合には、例えばモータ
ー３と９との回転速度が異なると、光軸検出スイッチの
摺動接点の移動速度も異なり、右側の光軸検出スイッチ
摺動接点が“１″の位置へ達したにもかかわらず、左側
の光軸検出スイッチ摺動接点が未だ（Ｉ　ＯＩＩと′１
″の間にある。すると、十電源は選択スイッチの端子１
→スイツチＢ′→スイツチＤ′（スイッチＦ′）→スイ
ッチＤ（スイッチＦ）→モーター３となり、すでに”１
″′の位置へ達している右側の摺動接点ならびに前照灯
は、左側の摺動接点が°Ｉ、ｊ″の位置へ到達しスイッ
チＢ′がＯＦＦとなるまで、更に′２″の方向へ移動を
継続し誤動作となる。したがって逆流防止ダイオードを
設けてこれを防止する。 選択スイッチをどのように切替えても、同様にして選択
スイッチの切替目盛に対応する位置に、光軸検出スイッ
チの摺動接点が移動する。すなわち前照灯の光軸が変化
する。 第３図には他の実施例を示す。 この実施例は、２回路の選択スイッチ６′を用いて左、
右側々の回路とすることにより、逆流防止ダイオードが
不用となる例を示す。なお、第３図は第２図の実施例と
同一の部分は同一符号を付してその詳細な説明は省略す
る。 第５図は光軸駆動装置の一例を示す構造図である。 ５は前照灯、３はモーターでＡ　、Ｂ　、Ｃ、Ｄ　。 Ｅ、Ｆは第４図に示す光軸検出スイッチの固定接点、ａ
、ｂ、ｄ、ｆは同じく摺動接点を示す。前照灯５０光軸
を変化させたいとき、所望の位置へ第２図ならびに第３
図に示す選択スイッチ６を切替えると、モーター３は正
転または逆転し、歯車機構を介して摺動接点ａ　、ｂ　
、ｄ　、ｆを移動させ、選択スイッチの設定位置の対応
する位置へ変化略せるとこれと連動して光軸も変化する
。 以上説明してきたように、この発明によれば、その構成
を複数個のスイッチで構成される光軸検出スイッチを設
け、モーターの正転と逆転との界磁（電機子）巻線を別
個としたため、温度変化ならびに経年変化が少なく、極
性切替回路が不用で信頓性の向上が期待できるという効
果が得られる。 図面の簡単な説明 第１図は従来の光軸調整装置を示す回路図、第２図は本
発明の実施の一例を示す回路図５第３図は他の実施例で
、２回路の選択スイッチを用いた例を示す。第４図は第
２図に示す回路の作用説明図、第５図は機構部の一例を
示す断面図である。 ｌ・・・右側光軸検出スイッチ、２・・・逆流防止ダイ
オード、３・・・界磁（電機子）巻線モーター、４・・
・右側光軸駆動装置、５・・・右側前照灯、６・・・選
択スイッチ、７・・・左側光軸検出スイッチ、８・・・
逆流防止タイオード、９・・・界磁（電機子）巻線モー
ター、１０・・・左側光軸駆動装置、１１・・・左側前
照灯。 特許出願人　市光工業株式会社 代理人　弁理士　秋　本　正　実Fig. 1 is a circuit diagram showing a conventional optical axis adjustment device, Fig. 2 is a circuit diagram showing an example of implementation of the present invention, and Fig. 3 is another embodiment, an example using a two-circuit selection switch. show. FIG. 4 is an explanatory diagram of the operation of the circuit shown in FIG. 2, and FIG. 5 is a sectional view showing an example of the mechanism section. DESCRIPTION OF SYMBOLS 1... Right optical axis detection switch, 2... Backflow prevention diode, 3... Field winding motor, 4... Right optical axis drive device, 5... Right side headlight, 6...・Selection switch, 7... Left optical axis detection switch, 8... Backflow prevention diode, 9... Field winding motor, lO... Left optical axis drive device, 11... Left side headlight . Patent applicant: Ichikoh Kogyo Co., Ltd. Representative Patent attorney Tadashi Akimoto Figure 1 Figure 2 Figure 3 Figure 5 Procedural amendment (voluntary) July 23, 1980 Mr. Commissioner of the Japan Patent Office■, Indication of the case Showa 5G, Patent Application No. 1FO 03 No. 2, Title of Invention: Optical axis adjustment device for headlights 3, IsI case related to person making amendment Patent applicant Office (Jji) Tokyo Parts Industry Ward, Higashimantan 1" 5-chome 101-mu 188・Name (name υj・) (013) Ichikoh Kogyo Co., Ltd. 4. Agent (amended) description Title of the invention Headlamp optical axis adjustment device Claim 1: Motor an optical axis drive device that changes the direction of an optical axis of a headlamp of a vehicle by rotation of the headlamp; an optical axis detection switch that sequentially switches a plurality of contacts in accordance with the direction of the optical axis of the headlamp; The headlight is comprised of a selection switch that is preset according to the load applied to the headlight, a backflow prevention diode to prevent malfunction, a forward rotation limit, and a TFC motor. optical axis adjustment device. 2. A first limit switch that opens at one limit position in the optical axis direction and closes at the other position, and a second limit switch that opens at the other limit position and closes at the other position; Open at the set position and close on both sides of the set position 2
2. The optical axis adjustment device for a headlamp according to claim 1, further comprising an optical axis detection switch composed of one or more position switches consisting of a set of switches. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the optical axis of a vehicle headlamp by operating a knob in accordance with the load on the vehicle. As a conventional optical axis adjustment device for a headlamp, there is one shown in FIG. 1, for example. Potentiometer 1 (VR
+) is switched by operating the knob. Potentiometer 2 (VH2) switches according to changes in the optical axis of the headlight. 3 is a comparison circuit, potentiometer 1
and the output voltage of potentiometer 2, and output the result. 4 is a motor and drive circuit, and as a result of the comparison by the comparison circuit, if an output signal is output to 3a, the transistor (Tr+) is turned on via the resistor (R1), and the relay (R
yz) is activated, the contact Ikl is switched, 0 current i] flows, and the motor rotates forward. Further, if an output signal is output to 3b, contact b1 is switched in the same way, current 12 flows, and the motor rotates in reverse. With the above configuration, when the knob is operated, the motor rotates so that the output voltage of the 5-potentiometer 1 and the output voltage of the potentiometer 2 are always equal, and the optical axis of the headlight can be adjusted. However, in such conventional optical axis adjustment devices for headlights, a potentiometer is used to detect the optical axis direction and the voltage is compared, so the temperature and aging of the potentiometer are The problem is that it is large. This invention was developed by focusing on these conventional problems, and uses a combination of switches to detect the direction of the optical axis.
The aim is to solve the above problems by using a motor with forward and reverse field (armature) windings. The present invention will be explained below based on the drawings. FIG. 2 is a diagram showing an embodiment of the present invention. First, to explain the configuration, l is an optical axis detection switch in which several switches (A-F) are switched sequentially according to changes in the optical axis of the right headlight, and the optical axis drive device As shown in FIG. 4, the sliding contacts move concentrically in response to changes in the optical axis. At position tt On, switches A, C, and E are OFF, and switches B and D
, F are ON. In position 1'', switches B and C
, E are (3FF, switches A, D, F are ON, switch B is in position “2”. D, E are OFF, switches A, C, F are ON, position “2”)
3”, switches B, D, and F are OFF, and switch A is OFF.
, C, and B are ON. Note that switch A has fixed contact A and sliding contact a, and switch B has fixed contact B and sliding contact b.
, switch C consists of a fixed contact C and a sliding contact b, switch D consists of a fixed contact and a sliding contact d, switch E consists of a fixed contact E and a sliding contact d, and switch F consists of a fixed contact F and a sliding contact f. (See Figure 4). Reference numeral 2 denotes a backflow prevention diode, which prevents current from flowing to the left motor through other switches of the optical axis detection switch, thereby preventing malfunction. 3 is a motor with two field (armature) windings, a forward rotation field (armature) winding and a reverse rotation field (armature) winding, and current is applied to the forward rotation field (armature) winding. flows, the motor rotates forward,
When current flows through the reversing field (armature) windings, the motor reverses. 4 is an optical axis driving device, an example of which is shown in FIG. As the motor 3 rotates forward (reversely), the right headlight 5 moves and its optical axis changes. 6 is a selection switch, which is set in advance according to the load.
There are 3 switching scales, and the appropriate scale can be selected and switched according to the actual load. The common terminal is connected to the ten power supplies, and by switching, the ten power supplies are connected to the terminals O to 3. The backflow prevention diode is connected between each terminal and sliding contacts a, b, d, and f of the optical axis detection switch. The optical axis detection switch 7, backflow prevention diode 8, motor 9, and optical axis driving device Li1O5 headlight 11 are for the left side, and the selection switch 6 is common for both left and right sides. In this example, there are four locations from 0 to 3, but there are three locations from 0 to 2.
The same applies to five or more locations. Next, the operation of the optical axis adjustment device of the present invention having the above-mentioned configuration will be explained. The embodiment of FIG. 2 shows the state when the selection switch 6 is switched to tto++, the optical axis changes, and the sliding contact of the optical axis detection switch reaches the position It Q It and stops. When a load is applied to the rear part of the vehicle width, the selection switch 6 is switched by selecting a scale according to the degree of load in order to prevent the optical axis of the headlight from being directed upward. When switching from 0 to 1 now, the 10 power supply passes from terminal 1 of the selection switch to anti-reverse diodes 2 and 8, and then through switches B and B' to the right motor 3 and the forward (reverse) field of the left motor 9. Since it is connected to the (armature) winding, the left and right motors turn forward (reverse) and the optical axis changes downward. The sliding contacts of optical axis detection switches 1 and 7 change from position (10” to position I
When the motors move toward IIII and reach "1", switches B and B' are turned OFF, and no current flows through the motors 3 and 9, and they stop. Now select switch 6
By switching from 0 to 1, the optical axis becomes at 1rr
This means that the position of the trench has changed. At this time, if there are no backflow prevention diodes 2 and 8, for example, if the rotation speeds of motors 3 and 9 are different, the moving speed of the sliding contact of the optical axis detection switch will also be different, and the right optical axis detection switch slide Even though the sliding contact has reached the “1” position, the sliding contact of the left optical axis detection switch still remains (I OII and ’1).
''.Then, the 10th power supply is connected to terminal 1 of the selection switch.
→ Switch B' → Switch D' (Switch F') → Switch D (Switch F) → Motor 3, already "1"
The right-hand sliding contact and the headlight, which have reached the ``'' position, continue in the ``2'' direction until the left-hand sliding contact reaches the °I,j'' position and the switch B' is turned OFF. This will cause a malfunction.Therefore, a backflow prevention diode is installed to prevent this.No matter how the selection switch is changed, the optical axis detection switch is placed in the same way at the position corresponding to the selection switch's switching scale. The sliding contact moves, that is, the optical axis of the headlight changes. Fig. 3 shows another embodiment. In this embodiment, a two-circuit selection switch 6' is used to select the left,
An example will be shown in which a backflow prevention diode is unnecessary by configuring the circuit on the right side. Incidentally, in FIG. 3, the same parts as in the embodiment of FIG. 2 are designated by the same reference numerals, and detailed explanation thereof will be omitted. FIG. 5 is a structural diagram showing an example of an optical axis driving device. 5 is the headlight, 3 is the motor, A, B, C, D. E and F are fixed contacts of the optical axis detection switch shown in Fig. 4, a
, b, d, and f similarly indicate sliding contacts. When you want to change the optical axis of the headlight 50, move it to the desired position in Figures 2 and 3.
When the selection switch 6 shown in the figure is switched, the motor 3 rotates forward or reverse, and the sliding contacts a and b are connected via a gear mechanism.
, d, and f, and the setting position of the selection switch is changed to the corresponding position, the optical axis also changes in conjunction with this. As explained above, according to the present invention, an optical axis detection switch consisting of a plurality of switches is provided, and the field (armature) windings for forward and reverse rotation of the motor are separated. As a result, temperature changes and aging changes are small, a polarity switching circuit is unnecessary, and reliability can be expected to be improved. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram showing a conventional optical axis adjustment device, Fig. 2 is a circuit diagram showing an example of the implementation of the present invention, and Fig. 3 is another embodiment, which includes a two-circuit selection switch. An example using . FIG. 4 is an explanatory diagram of the operation of the circuit shown in FIG. 2, and FIG. 5 is a sectional view showing an example of the mechanism section. l... Right optical axis detection switch, 2... Backflow prevention diode, 3... Field (armature) winding motor, 4...
- Right side optical axis drive device, 5... Right side headlight, 6... Selection switch, 7... Left side optical axis detection switch, 8...
Backflow prevention diode, 9... Field (armature) winding motor, 10... Left optical axis drive device, 11... Left side headlight. Patent applicant Masami Akimoto, agent of Ichikoh Industries, Ltd., patent attorney

Claims (1)

【特許請求の範囲】 １、モータの回転により車輛の前照灯の光軸の方向を変
化させる光軸駆動装置と、前記前照灯の光軸の方向に対
応して複数の接点が順次切替わる光軸検出スイッチと、
前記車輛に加わる荷重の大きさに応じて予め設定されて
いる選択スイッチと、誤動作を防止する逆流防止ダイオ
ードと、正転界磁巻線と逆転界磁巻線とを備えたモータ
ーから構成されることを特徴とする前照灯の光軸調整装
置。 ２、光軸方向の一方の限界位置で開成し、他の位置では
閉成する第１の限界スイッチと、他方の限界位置で開成
し他の位置では閉成する第２の限界スイッチと、各設定
位置で開成し、設定位置の両側でそれぞれ閉成する２組
のスイッチから成る１個以上の位置スイッチとから構成
される光軸検出スイッチを持つことを特徴とする特許請
求の範囲、第１項に記載の前照灯の光軸調整装置。[Claims] 1. An optical axis drive device that changes the direction of the optical axis of a vehicle headlamp by rotation of a motor, and a plurality of contacts that are sequentially turned off in accordance with the direction of the optical axis of the headlamp. Replaceable optical axis detection switch and
It is composed of a motor equipped with a selection switch that is preset according to the magnitude of the load applied to the vehicle, a backflow prevention diode that prevents malfunction, and a forward rotation field winding and a reverse rotation field winding. A headlight optical axis adjustment device characterized by: 2. A first limit switch that opens at one limit position in the optical axis direction and closes at the other position, and a second limit switch that opens at the other limit position and closes at the other position; Claim 1, characterized in that it has an optical axis detection switch composed of one or more position switches consisting of two sets of switches that are opened at a set position and closed on both sides of the set position, respectively. The headlamp optical axis adjustment device described in .
JP19090383A 1983-10-14 1983-10-14 Optical axis adjusting device of head lamp Pending JPS6082941A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP19090383A JPS6082941A (en) 1983-10-14 1983-10-14 Optical axis adjusting device of head lamp
DE198484112319T DE138217T1 (en) 1983-10-14 1984-10-12 DEVICE FOR ADJUSTING HEADLIGHTS OF A VEHICLE.
DE8484112319T DE3469001D1 (en) 1983-10-14 1984-10-12 Apparatus for adjusting the inclination of the automobile headlamp
EP84112319A EP0138217B1 (en) 1983-10-14 1984-10-12 Apparatus for adjusting the inclination of the automobile headlamp
US06/660,100 US4533860A (en) 1983-10-14 1984-10-12 Apparatus for adjusting the inclination of automobile headlamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19090383A JPS6082941A (en) 1983-10-14 1983-10-14 Optical axis adjusting device of head lamp

Publications (1)

Publication Number Publication Date
JPS6082941A true JPS6082941A (en) 1985-05-11

Family

ID=16265632

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19090383A Pending JPS6082941A (en) 1983-10-14 1983-10-14 Optical axis adjusting device of head lamp

Country Status (1)

Country Link
JP (1) JPS6082941A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5536152A (en) * 1978-09-05 1980-03-13 Nippon Denso Co Ltd Apparaus for controlling optical axis of front illuminating lamp for car

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5536152A (en) * 1978-09-05 1980-03-13 Nippon Denso Co Ltd Apparaus for controlling optical axis of front illuminating lamp for car

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