JP4444318B2 - Latch device for vehicle - Google Patents

Latch device for vehicle Download PDF

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JP4444318B2
JP4444318B2 JP2007208635A JP2007208635A JP4444318B2 JP 4444318 B2 JP4444318 B2 JP 4444318B2 JP 2007208635 A JP2007208635 A JP 2007208635A JP 2007208635 A JP2007208635 A JP 2007208635A JP 4444318 B2 JP4444318 B2 JP 4444318B2
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latch
ratchet
engaging
groove
engagement
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JP2009041289A (en
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大樹 服部
文 宝方
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Mitsui Mining and Smelting Co Ltd
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Mitsui Mining and Smelting Co Ltd
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本発明は、車両のドア、バックドア、トランクリッド、シートバック及びシートクッション等のラッチ装置に関する。   The present invention relates to a latch device such as a vehicle door, a back door, a trunk lid, a seat back, and a seat cushion.

従来の車両用ラッチ装置としては、例えば、特開２００２−２７６２２８号公報に開示されているようなものがある。このラッチ装置は、車体側に固着されるストライカと係合可能な金属板状のラッチと、このラッチと係合することによりラッチの回動を阻止する金属板状のラチェットとを備え、ラッチ及びラチェットの外周面に、合成樹脂成型部を一体成型している。ラチェットに成型される合成樹脂成型部は、ラッチに係合可能なラチェットの係合爪部にその金属係合面よりも突出してラッチに当接可能な緩衝部を形成し、この緩衝部によって、ラッチとラチェットとが互いに当接するときの当接音を緩和するようにしている。
特開２００２−２７６２２８号公報 As a conventional latch device for vehicles, there exists a thing as disclosed by Unexamined-Japanese-Patent No. 2002-276228, for example. The latch device includes a metal plate-like latch that can be engaged with a striker fixed to the vehicle body side, and a metal plate-like ratchet that prevents the latch from rotating by engaging with the latch. A synthetic resin molding part is integrally formed on the outer peripheral surface of the ratchet. The synthetic resin molding part molded in the ratchet forms a buffer part that protrudes from the metal engaging surface of the ratchet engaging claw part that can be engaged with the latch, and can contact the latch. The abutment sound when the latch and the ratchet abut against each other is alleviated.
JP 2002-276228 A

しかし、上述のような車両用ラッチ装置においては、緩衝部を、ラチェットの外側面に施される合成樹脂成型部の側面成型部の一部を係合爪部よりも突出するように形成しているため、ラッチとラチェットの係合、離脱が幾度も繰り返されると、緩衝部に作用する圧縮荷重の影響を受け、緩衝部を含む側面成型部がラチェットの外側面から剥離する等して、ラッチとラチェットとが当接するときの当接音を緩和する効果が早期に劣化するおそれがある。   However, in the vehicle latch device as described above, the buffer portion is formed so that a part of the side molding portion of the synthetic resin molding portion applied to the outer surface of the ratchet protrudes from the engagement claw portion. Therefore, if engagement and disengagement of the latch and the ratchet are repeated many times, the side molded part including the buffer part is peeled off from the outer surface of the ratchet due to the influence of the compressive load acting on the buffer part. There is a possibility that the effect of alleviating the contact sound when the contact and the ratchet come into contact with each other may deteriorate early.

本発明は、上記のような課題に鑑み、ラチェットの係合爪部に対する緩衝部の固着を強固にして、ラッチとラチェットとが互いに当接するときの当接音を長期に亘って緩和することができるようにした車両用ラッチ装置を提供することを目的としている。   In view of the above-described problems, the present invention can strengthen the fixing of the buffer portion to the engaging claw portion of the ratchet and relieve the contact sound when the latch and the ratchet contact each other over a long period of time. It is an object of the present invention to provide a vehicular latch device that can be used.

本発明によると、上記課題は、次のようにして解決される。
ベース部材に、ストライカと係合可能なラッチと、前記ラッチに設けられた係合部に係合することにより前記ラッチの回動を阻止する係合爪部を有する金属板状のラチェットをそれぞれ枢着して成る車両用ラッチ装置において、前記ラチェットにおける前記係合爪部の板厚方向のほぼ中央部に、前記係合爪部の先端から前記ラチェットの解除回動方向へ沿う帯状の溝部を形成し、前記溝部の端部を、前記係合爪部が前記ラッチの前記係合部に係合した状態において前記係合部よりも前記ラチェットの解除回動方向側に位置するように延設し、前記ラチェットの外周面に、前記係合爪部の板厚方向における前記溝部の両側に金属面が露出するように合成樹脂成型部を一体成型し、前記合成樹脂成型部は、前記ラチェットの側面部を覆う側面成型部と、前記側面成型部に直接繋がるとともに、前記ラッチの回動時に前記係合部の先端が摺接する前記ラチェットの顎部にその板厚方向の全域を覆う第１の縁成型部と、前記溝部内に成型されて前記第１の縁成型部に滑らかに繋がるとともに、前記溝部の両側に形成される金属露出面よりも突出して前記ラッチの前記係合部に当接可能な緩衝部と、前記側面成型部に直接繋がるとともに、前記溝部の端部を含む前記ラチェットの縁の板厚方向の全域を覆う第２の縁成型部を含む。 According to the present invention, the above problem is solved as follows.
A metal plate-like ratchet having a latch that can engage with the striker and an engaging claw that prevents the latch from rotating by engaging with an engaging portion provided on the latch is pivoted on the base member. In the vehicular latch device that is attached, a belt-like groove portion extending from the front end of the engagement claw portion to the release rotation direction of the ratchet is formed at a substantially central portion in the plate thickness direction of the engagement claw portion of the ratchet. Then, the end of the groove is extended so as to be positioned closer to the release rotation direction side of the ratchet than the engaging portion when the engaging claw is engaged with the engaging portion of the latch. The synthetic resin molding part is integrally formed on the outer peripheral surface of the ratchet so that the metal surfaces are exposed on both sides of the groove part in the plate thickness direction of the engagement claw part, and the synthetic resin molding part is formed on the side surface of the ratchet. Side molding that covers the part A first edge molding portion that is directly connected to the side surface molding portion and covers the entire region in the plate thickness direction on the jaw portion of the ratchet with which the front end of the engagement portion is slidably contacted when the latch is rotated, and the groove portion A buffer portion that is molded in and smoothly connected to the first edge molding portion, protrudes from the metal exposed surface formed on both sides of the groove portion, and can contact the engaging portion of the latch; and A second edge molding part that directly connects to the side molding part and covers the entire region of the edge of the ratchet including the end part of the groove part in the plate thickness direction is included .

本発明によれば、次のような効果が奏せられる。
緩衝部が係合爪部の板厚方向のほぼ中央に設けた溝部に填り込むように帯状に形成されるため、緩衝部の係合爪部への固着が強固になり、ラッチとラチェットの係合時における当接音を効果的に緩和することができる。
ラチェットの顎部にその板厚方向の全域を覆う第１の縁成型部を設けたことにより、ストライカとの係合によりラッチが回動するとき、ラッチとラチェットとが互いに当接する当接音を緩和することができると共に、ラッチ及びラチェットの回動を円滑にすることができる。また、ラッチの係合部とラチェットの係合爪部間に、摺動抵抗を増加させることがないので、円滑な操作が得られる。
さらに、溝部の端部を含むラチェットの縁の板厚方向の全域を第２の縁成型部により覆ったことにより、緩衝部をより強固に係合爪部に固着することができる。 According to the present invention, the following effects can be obtained.
Since the buffer portion is formed in a band shape so as to fit into the groove portion provided in the center of the engagement claw portion in the plate thickness direction, the buffer portion is firmly fixed to the engagement claw portion, and the latch and ratchet The contact noise at the time of engagement can be relieved effectively.
By providing the first edge molding portion covering the entire region in the plate thickness direction on the jaw portion of the ratchet, when the latch is rotated by the engagement with the striker, a contact sound in which the latch and the ratchet abut each other is generated. While being able to relieve, the latch and the ratchet can be rotated smoothly. Further, since the sliding resistance is not increased between the engaging portion of the latch and the engaging claw portion of the ratchet, a smooth operation can be obtained.
Furthermore, by covering the entire region in the plate thickness direction of the edge of the ratchet including the end portion of the groove portion with the second edge molding portion, the buffer portion can be more firmly fixed to the engaging claw portion.

以下、本発明に係わる一実施形態を、図に基づいて説明する。
図１に示すように、ラッチ装置１は、車体に開閉可能に設けられるドア(図示略)に固定される合成樹脂製のベース部材２を備え、このベース部材２の内部には、枢軸３により枢着され、かつ車体に固着されるストライカ４と係合可能なラッチ５と、枢軸６により枢着され、かつストライカ４と係合したラッチ５と係合することにより、ラッチ５のオープン方向（図１〜図３において時計方向）への回動を阻止するラチェット７が設けられている。なお、図１においては、ラッチ装置１の内部構造を明示するため、ベース部材２の表面を閉塞するカバープレートを省略している。 Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the latch device 1 includes a synthetic resin base member 2 fixed to a door (not shown) that can be opened and closed on the vehicle body. A latch 5 that can be engaged with the striker 4 that is pivotally attached and fixed to the vehicle body, and a latch 5 that is pivotally attached to the striker 4 and engaged with the striker 4, thereby opening the latch 5 in the opening direction ( A ratchet 7 is provided to prevent rotation in the clockwise direction in FIGS. In FIG. 1, a cover plate that closes the surface of the base member 2 is omitted in order to clearly show the internal structure of the latch device 1.

ラッチ５は、金属製板により形成され、ストライカ４に係合可能な係合溝５１、ラチェット７の係合爪部７１に係合可能なハーフラッチ係合部５２及びフルラッチ係合部５３を有し、ドアの閉動作に伴って、ストライカ４が係合溝５１に係合することによって、図１に２点鎖線で示すオープン位置から、図２、３に示す回動途中状態を経て、図１に実線で示すフルラッチ位置に回動する。ラッチ５におけるフルラッチ係合部５３及びその近傍を除く外周面には、合成樹脂成型部８が一体成型されている。なお、ラッチ５は、ばね（図示略）により常時オーオン位置へ向けて付勢されている。   The latch 5 is formed of a metal plate and has an engagement groove 51 that can be engaged with the striker 4, a half latch engagement portion 52 that can be engaged with an engagement claw portion 71 of the ratchet 7, and a full latch engagement portion 53. When the striker 4 is engaged with the engagement groove 51 in accordance with the closing operation of the door, the open position shown by the two-dot chain line in FIG. 1 passes through the turning state shown in FIGS. 1 is rotated to a full latch position indicated by a solid line. A synthetic resin molding portion 8 is integrally molded on the outer peripheral surface of the latch 5 except for the full latch engaging portion 53 and the vicinity thereof. Note that the latch 5 is always biased toward the orion position by a spring (not shown).

ラチェット７は、金属製板により形成されて、その外周面には合成樹脂成型部９が一体成型されると共に、そのほぼ中央部には、枢軸６が枢嵌される枢支孔７２が設けられ、また、同じく回動端には、係合爪部７１が設けられている。なお、ラチェット７は、ばね（図示略）により、係合位置（図１参照）へ向けて常時付勢されると共に、ベース部材２の裏面側に設けられる解除レバー（図示略）の作動に従動して、ばねの付勢力に抗して係合位置から解除方向（図１〜図３において時計方向）へ回動する。   The ratchet 7 is formed of a metal plate, and a synthetic resin molding portion 9 is integrally formed on the outer peripheral surface thereof, and a pivot support hole 72 into which the pivot shaft 6 is fitted is provided at a substantially central portion thereof. Similarly, an engaging claw 71 is provided at the rotation end. The ratchet 7 is constantly urged toward the engagement position (see FIG. 1) by a spring (not shown) and is driven by the operation of a release lever (not shown) provided on the back side of the base member 2. Then, it rotates in the releasing direction (clockwise in FIGS. 1 to 3) from the engagement position against the urging force of the spring.

係合爪部７１は、ラッチ５がオープン位置からフルラッチ位置に向けて回動することにより、ラッチ５のハーフラッチ係合部５２またはフルラッチ係合部５３に係合することにより、ラッチ５をハーフラッチ位置またはフルラッチ位置に保持するもので、主に図４、６及び図１１に示すように、その板厚方向（図４、１１において上下方向）のほぼ中央には、係合爪部７１の先端７１ａから回動方向（解除方向）に沿って、所定位置まで延設された帯状の溝部１０が設けられている。溝部１０は、その端部が、係合爪部７１がラッチ５のフルラッチ係合部５３に係合した状態（図１参照）においてフルラッチ係合部５３よりも外側（ラチェット７の回動方向側）に位置するように延設される。なお、図４に示す断面図は、図面簡素化のため、枢軸３、６及びベース部材２を省略している。   The engaging claw portion 71 engages with the half latch engaging portion 52 or the full latch engaging portion 53 of the latch 5 by rotating the latch 5 from the open position toward the full latch position, thereby causing the latch 5 to half. As shown in FIGS. 4, 6, and 11, the engagement claw portion 71 is substantially at the center in the plate thickness direction (vertical direction in FIGS. 4 and 11). A belt-like groove 10 extending from the tip 71a to a predetermined position along the rotation direction (release direction) is provided. The end portion of the groove portion 10 is outside the full latch engaging portion 53 in the state where the engaging claw portion 71 is engaged with the full latch engaging portion 53 of the latch 5 (see FIG. 1) (the rotation direction side of the ratchet 7). ). In the cross-sectional view shown in FIG. 4, the pivots 3 and 6 and the base member 2 are omitted for simplification of the drawing.

ラチェット７の合成樹脂成型部９は、主に図５に示すように、係合爪部７１における板厚方向の溝部１０の両側に金属露出面７１ｂを形成し、かつ溝部１０に填るように成型される帯状の緩衝部９１と、ラチェット７の外側面を覆う側面成型部９２と、ラチェット７の縁を覆う縁成型部（第１の縁成型部）９３と、枢支孔７２の内周面を被覆する部分とを一体成型している。 As shown mainly in FIG. 5, the synthetic resin molding portion 9 of the ratchet 7 forms a metal exposed surface 71 b on both sides of the groove portion 10 in the plate thickness direction of the engaging claw portion 71 and fills the groove portion 10. A band-shaped buffer portion 91 to be molded, a side surface molding portion 92 that covers the outer surface of the ratchet 7, an edge molding portion (first edge molding portion) 93 that covers the edge of the ratchet 7, and the inner periphery of the pivot hole 72 The part that covers the surface is integrally molded.

緩衝部９１は、主に図４に示すように、金属露出面７１ｂよりも僅かに突出してフルラッチ係合部５３に当接可能であって、係合爪部７１の先端７１ａに設けられた溝部１０からラチェット７の縁における顎部７３に成型される縁成型部９３に滑らかに繋がるように成型され、また、係合爪部７１における溝部１０の端部１０ａ側においては、主に図７、１０に示すように、端部１０ａを含む板厚方向の全域が縁成型部（第２の縁成型部）９３ａにより覆うように成型される。また、緩衝部９１の板厚方向の両側に金属露出面７１ｂが形成されるため、緩衝部９１は、側面成型部９２に直接繋がらないように成型される。 As shown mainly in FIG. 4, the buffer portion 91 protrudes slightly from the metal exposed surface 71 b and can contact the full latch engaging portion 53, and is a groove portion provided at the tip 71 a of the engaging claw portion 71. 10 is molded so as to be smoothly connected to the edge molding portion 93 molded to the jaw portion 73 at the edge of the ratchet 7, and on the end 10 a side of the groove portion 10 in the engagement claw portion 71, mainly FIG. As shown in FIG. 10, the entire region in the thickness direction including the end portion 10 a is molded so as to be covered with an edge molding portion (second edge molding portion) 93 a. Further, since the metal exposed surfaces 71b are formed on both sides of the buffer portion 91 in the plate thickness direction, the buffer portion 91 is molded so as not to be directly connected to the side surface molded portion 92.

次に、本発明に係わる実施形態の作用について説明する。ドアの閉動作に伴って、ストライカ４がラッチ５の係合溝５１に係合すると、ラッチ５は、オープン位置（図１に示す想像線）からばねの付勢力に抗して、フルラッチ位置へ向けて回動する。ラチェット７は、ラッチ５がフルラッチ位置に至る過程で、ハーフラッチ係合部５２に続いて、図２に示す第１状態のように、フルラッチ係合部５３の先端側がラチェット７の顎部７３を覆う縁成型部９３に当接しつつ摺動することに伴って、ばねの付勢力に抗して、一旦解除方向へ回動する。   Next, the operation of the embodiment according to the present invention will be described. When the striker 4 is engaged with the engagement groove 51 of the latch 5 with the door closing operation, the latch 5 moves from the open position (imaginary line shown in FIG. 1) to the full latch position against the biasing force of the spring. Rotate towards. In the process of the latch 5 reaching the full latch position, the ratchet 7 follows the half latch engaging portion 52 and the front end side of the full latch engaging portion 53 connects the jaw portion 73 of the ratchet 7 as in the first state shown in FIG. As it slides in contact with the covering edge molding portion 93, it once rotates in the releasing direction against the biasing force of the spring.

さらに、ラッチ５がフルラッチ位置へ向けて回動すると、図３に示す第２状態のように、ラチェット７は、ばねの付勢力をもって、係合方向へ向けて回動し、係合爪部７１の先端７１がフルラッチ係合部５３の外周縁に当接する。そして、ラッチ５がさらに回転して、オーバーストローク位置（フルラッチ位置を僅かに超えた位置）に達すると、ラチェット７が、ばねの付勢力により係合位置に回動した後、ラッチ５がオーバーストローク位置からドアのシール反力によりフルラッチ位置に戻ると、図１に実線で示す第３状態のように、係合爪部７１がフルラッチ係合部５３に係合して、ラッチ５はフルラッチ位置に保持される。   Further, when the latch 5 is rotated toward the full latch position, the ratchet 7 is rotated in the engagement direction by the urging force of the spring as in the second state shown in FIG. The front end 71 of the full contact is in contact with the outer peripheral edge of the full latch engaging portion 53. When the latch 5 further rotates and reaches an overstroke position (a position slightly beyond the full latch position), the ratchet 7 is rotated to the engagement position by the biasing force of the spring, and then the latch 5 is overstroked. When the door returns to the fully latched position due to the seal reaction force of the door, as shown in the third state shown by the solid line in FIG. 1, the engaging claw portion 71 engages with the fully latched engaging portion 53, and the latch 5 reaches the fully latched position. Retained.

上記第１の状態においては、緩衝部９１が、係合爪部７１の先端７１ａに設けられた溝部１０からラチェット７の縁における顎部７３に成型される縁成型部９３に滑らかに繋がるように成型されるため、フルラッチ係合部５３の外周縁は、ラチェット７の顎部７３を円滑に摺動することができる。これにより、ラッチ５及びラチェット７の円滑な回動を可能にして、ドア閉動作中の異音発生を防止することができる。   In the first state, the buffer portion 91 is smoothly connected from the groove portion 10 provided at the tip 71a of the engagement claw portion 71 to the edge molding portion 93 that is molded into the jaw portion 73 at the edge of the ratchet 7. Since it is molded, the outer peripheral edge of the full latch engaging portion 53 can smoothly slide on the jaw portion 73 of the ratchet 7. Thereby, smooth rotation of the latch 5 and the ratchet 7 is enabled, and generation | occurrence | production of the noise during a door closing operation | movement can be prevented.

上記第２の状態においては、ラチェット７の係合爪部７１の先端７１ａに設けられた緩衝部９１がフルラッチ係合部５３の外周縁に当接するため、そのときの当接音は緩和される。   In the second state, the buffer portion 91 provided at the tip 71a of the engaging claw portion 71 of the ratchet 7 contacts the outer peripheral edge of the full latch engaging portion 53, so that the contact sound at that time is alleviated. .

上記第３の状態においては、（ａ）係合爪部７１に設けた緩衝部９１がラッチ５のフルラッチ係合部５３に当接するため、そのときの当接音を緩和することができる。（ｂ）係合爪部７１に大きな荷重が作用した場合には、フルラッチ係合部５３に当接した緩衝部９１が弾性変形して、フルラッチ係合部５３が係合爪部７１の金属露出面７１ｂに当接するため、フルラッチ係合部５３と係合爪部７１との噛合強度を確保することができる。（ｃ）緩衝部９１を係合爪部７１の溝部１０に填るように成型しているため、緩衝部９１の係合爪部７１への固着が強固になり、耐久性の向上を図ることができる。（ｄ）緩衝部９１を、係合爪部７１の板厚方向のほぼ中央に帯状に設けているため、フルラッチ係合部５３と係合爪部７１とが互いに板厚方向へ若干ずれた状態で係合しても、緩衝部９１は、フルラッチ係合部５３に対して確実に当接することができる。（ｅ）緩衝部９１は側面成型部９２に直接繋がっていないため、緩衝部９１が圧縮変形しても、その変形が側面成型部９２に直接伝達されないため、側面成型部９２のラチェット７の側面からの剥離を防止することができる。（ｆ）係合爪部７１における溝部１０の端部１０ａ側は、端部１０ａを含む板厚方向の全域が縁成型部９３ａにより覆われているため、緩衝部９１をより強固に係合爪部７１に固着することができる。   In the third state, (a) the buffer portion 91 provided in the engaging claw portion 71 contacts the full latch engaging portion 53 of the latch 5, so that the contact noise at that time can be reduced. (B) When a large load is applied to the engaging claw portion 71, the buffer portion 91 in contact with the full latch engaging portion 53 is elastically deformed, and the full latch engaging portion 53 is exposed to the metal of the engaging claw portion 71. Since it abuts on the surface 71b, the meshing strength between the full latch engaging portion 53 and the engaging claw portion 71 can be ensured. (C) Since the buffer portion 91 is molded so as to fit in the groove portion 10 of the engaging claw portion 71, the buffer portion 91 is firmly fixed to the engaging claw portion 71, and durability is improved. Can do. (D) Since the buffer portion 91 is provided in a strip shape substantially at the center of the engagement claw portion 71 in the plate thickness direction, the full latch engagement portion 53 and the engagement claw portion 71 are slightly shifted from each other in the plate thickness direction. Even if engaged, the buffer portion 91 can surely abut against the full latch engaging portion 53. (E) Since the buffer part 91 is not directly connected to the side molding part 92, even if the buffer part 91 is compressed and deformed, the deformation is not directly transmitted to the side molding part 92. Can be prevented from peeling off. (F) Since the end portion 10a side of the groove portion 10 in the engaging claw portion 71 is covered with the edge molding portion 93a in the entire thickness direction including the end portion 10a, the buffer portion 91 is more firmly engaged with the engaging claw. It can be fixed to the portion 71.

なお、本発明は、上記実施形態に特定されるものではなく、ラッチ装置１を自動車のバックドア、トランクリッド、シートバック、及びシートクッション等のラッチ装置としても良い。この場合は、ラッチ５におけるハーフラッチ係合部５２は必ずしも必要とするものではない。   The present invention is not limited to the above-described embodiment, and the latch device 1 may be a latch device such as a back door, a trunk lid, a seat back, and a seat cushion of an automobile. In this case, the half latch engaging portion 52 in the latch 5 is not necessarily required.

本発明の一実施形態を適用したラッチ装置の正面図である。It is a front view of the latch device to which one embodiment of the present invention is applied. ラッチ装置における動作説明図である。It is operation | movement explanatory drawing in a latch apparatus. ラッチ装置における他の動作説明図である。It is other operation | movement explanatory drawing in a latch apparatus. 図１におけるIV−IV線横断面図である。FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1. ラチェットの拡大斜視図である。It is an expansion perspective view of a ratchet. 合成樹成型部を施す前のラチェットの拡大斜視図である。It is an expansion perspective view of a ratchet before giving a synthetic tree molding part. ラチェットの拡大正面図である。It is an enlarged front view of a ratchet. 図７におけるVIII矢視図である。It is a VIII arrow line view in FIG. 図７におけるXI矢視図である。It is a XI arrow line view in FIG. 図８におけるＸ−Ｘ線断面図である。It is the XX sectional view taken on the line in FIG. 図７におけるXI−XI線断面図であるIt is the XI-XI sectional view taken on the line in FIG.

１ ラッチ装置
２ ベース部材
３ 枢軸
４ ストライカ
５ ラッチ
６ 枢軸
７ ラチェット
８、９ 合成樹脂成型部
１０ 溝部
１０ａ 端部
５１ 係合溝
５２ ハーフラッチ係合部
５３ フルラッチ係合部
７１ 係合爪部
７１ａ 先端
７１ｂ 金属露出面
７２ 枢支孔
７３ 顎部
９１ 緩衝部
９２ 側面成型部
９３、９３ａ 縁成型部 1 latch device 2 base member 3 pivot 4 striker 5 latch 6 pivot 7 ratchet 8, 9 synthetic resin molding portion 10 groove portion 10a end portion 51 engagement groove 52 half latch engagement portion 53 full latch engagement portion 71 engagement claw portion 71a tip 71b Metal exposed surface 72 Pivot hole 73 Jaw part 91 Buffer part 92 Side surface molding part 93, 93a Edge molding part

Claims (1)

ベース部材に、ストライカと係合可能なラッチと、前記ラッチに設けられた係合部に係合することにより前記ラッチの回動を阻止する係合爪部を有する金属板状のラチェットをそれぞれ枢着して成る車両用ラッチ装置において、
前記ラチェットにおける前記係合爪部の板厚方向のほぼ中央部に、前記係合爪部の先端から前記ラチェットの解除回動方向へ沿う帯状の溝部を形成し、
前記溝部の端部を、前記係合爪部が前記ラッチの前記係合部に係合した状態において前記係合部よりも前記ラチェットの解除回動方向側に位置するように延設し、
前記ラチェットの外周面に、前記係合爪部の板厚方向における前記溝部の両側に金属面が露出するように合成樹脂成型部を一体成型し、
前記合成樹脂成型部は、前記ラチェットの側面部を覆う側面成型部と、前記側面成型部に直接繋がるとともに、前記ラッチの回動時に前記係合部の先端が摺接する前記ラチェットの顎部にその板厚方向の全域を覆う第１の縁成型部と、前記溝部内に成型されて前記第１の縁成型部に滑らかに繋がるとともに、前記溝部の両側に形成される金属露出面よりも突出して前記ラッチの前記係合部に当接可能な緩衝部と、前記側面成型部に直接繋がるとともに、前記溝部の端部を含む前記ラチェットの縁の板厚方向の全域を覆う第２の縁成型部を含むことを特徴とする車両用ラッチ装置。 A metal plate-like ratchet having a latch that can engage with the striker and an engaging claw that prevents the latch from rotating by engaging with an engaging portion provided on the latch is pivoted on the base member. In a vehicle latch device,
A belt-like groove portion extending from the front end of the engagement claw portion to the release rotation direction of the ratchet is formed at a substantially central portion in the plate thickness direction of the engagement claw portion in the ratchet ,
Extending the end of the groove so that the engaging claw is engaged with the engaging portion of the latch so as to be positioned closer to the release rotation direction of the ratchet than the engaging portion,
On the outer peripheral surface of the ratchet, a synthetic resin molding part is integrally molded so that metal surfaces are exposed on both sides of the groove part in the plate thickness direction of the engagement claw part,
The synthetic resin molding portion is directly connected to the side surface molding portion that covers the side surface portion of the ratchet and the side surface molding portion, and the jaw portion of the ratchet to which the tip of the engagement portion is slidably contacted when the latch rotates. A first edge molding portion that covers the entire region in the plate thickness direction, and is molded into the groove portion and smoothly connected to the first edge molding portion, and protrudes from the metal exposed surface formed on both sides of the groove portion. A buffer portion that can contact the engaging portion of the latch, and a second edge molding portion that is directly connected to the side surface molding portion and covers the entire region of the edge of the ratchet including the end portion of the groove portion in the plate thickness direction. vehicle latch device which comprises a.
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