JP5960975B2

JP5960975B2 - Push latch

Info

Publication number: JP5960975B2
Application number: JP2011263381A
Authority: JP
Inventors: 真吾中川
Original assignee: Simotec Co Ltd
Current assignee: Simotec Co Ltd
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2016-08-02
Anticipated expiration: 2031-12-01
Also published as: JP2013113076A

Description

本発明は、二つの部材の一方を他方に係止した状態と、二つの部材の一方を他方に係止しない状態とを切り替えるプッシュラッチの技術に関する。より詳細には、プッシュラッチを薄型化する技術に関する。 The present invention relates to a push latch technique for switching between a state in which one of two members is locked to the other and a state in which one of the two members is not locked to the other. More specifically, the present invention relates to a technique for thinning the push latch.

従来、例えば家具の扉を家具の本体に係止した状態（扉を閉じた状態）と、扉を本体に係止しない状態（扉を本体に対して回動可能な状態）とを切り替えるプッシュラッチとして、いわゆるハートカム型のプッシュラッチが知られている。例えば、特許文献１および特許文献２に記載の如くである。
ハートカム型のプッシュラッチは、家具の本体に固定される固定部材、当該固定部材に移動（スライド）可能に支持されるとともに図１７の（ａ）に示す如き無端状のハートカム溝１７０が形成され、家具の扉を着脱可能に係止するスライド部材、および一端部が固定部材に固定されるとともに他端部がハートカム溝に係合するピン部材を備える。
そして、ピン部材の他端部がハートカム溝１７０に係合しつつハートカム溝１７０に沿って一方向に（図１７の（ａ）の場合、反時計回りに）移動することにより、スライド部材が突出した状態とスライド部材が没入した状態とを交互に切り替える。
このようなハートカム型のプッシュラッチにおいては、ピン部材の他端部がハートカム溝１７０に沿って逆方向（図１７の（ａ）の場合、時計回りに）移動することを防止するため、ハートカム溝１７０の底面に第一落下段差１７１ａ、第二落下段差１７２ａ、第三落下段差１７３ａおよび第四落下段差１７４ａの如き「段差」が適宜形成されるとともに、ピン部材の一端部はハートカム溝１７０の底面に当接する方向に付勢される。 Conventionally, for example, a push latch that switches between a state in which the door of the furniture is locked to the main body of the furniture (a state in which the door is closed) and a state in which the door is not locked to the main body (a state in which the door can be rotated with respect to the main body) As such, a so-called heart cam type push latch is known. For example, it is as described in Patent Document 1 and Patent Document 2.
The heart cam type push latch is fixed to the main body of the furniture, is supported by the fixing member so as to be movable (slidable), and has an endless heart cam groove 170 as shown in FIG. A slide member that detachably locks the door of the furniture, and a pin member that has one end fixed to the fixing member and the other end engaged with the heart cam groove.
Then, the other end portion of the pin member moves in one direction along the heart cam groove 170 while engaging with the heart cam groove 170 (counterclockwise in the case of FIG. 17A), so that the slide member protrudes. And the state in which the slide member is immersed are alternately switched.
In such a heart cam type push latch, in order to prevent the other end of the pin member from moving in the reverse direction along the heart cam groove 170 (clockwise in the case of FIG. 17A), the heart cam groove A “step” such as a first drop step 171a, a second drop step 172a, a third drop step 173a, and a fourth drop step 174a is appropriately formed on the bottom surface of the 170, and one end of the pin member is the bottom surface of the heart cam groove 170. It is urged in the direction in which it abuts.

しかし、図１７の（ａ）に示す如く段差が比較的近い距離で連続して配置される場合（第一落下段差１７１ａ、第二落下段差１７２ａおよび第三落下段差１７３ａ参照）、連続する段差が開始される前の位置と連続する段差が終了する位置とではハートカム溝１７０の底面の高低差が大きくなってしまう（図１７の（ｂ）の場合、高低差は「３×Ｈ」となる）。
その結果、ハートカム溝１７０が形成されるスライド部材の上下方向（ピン部材の一端部が付勢される方向）の厚みが増大し、ひいてはプッシュラッチの大型化の原因となる。 However, when the steps are continuously arranged at a relatively short distance as shown in FIG. 17A (see the first drop step 171a, the second drop step 172a, and the third drop step 173a), the continuous steps are The height difference of the bottom surface of the heart cam groove 170 becomes large between the position before the start and the position where the continuous level difference ends (in the case of FIG. 17B, the height difference is “3 × H”). .
As a result, the thickness of the slide member in which the heart cam groove 170 is formed increases in the vertical direction (the direction in which one end of the pin member is urged), which in turn increases the size of the push latch.

実公平３−４６１４１号公報Japanese Utility Model Publication No. 3-46141 特開平７−３４７４６号公報JP-A-7-34746

本発明は以上の如き状況に鑑みてなされたものである。
すなわち、本発明が解決しようとする課題は、ハートカム溝の底面の高低差を小さくし、ひいては小型化が可能なプッシュラッチを提供すること、である。 The present invention has been made in view of the above situation.
That is, the problem to be solved by the present invention is to provide a push latch that can reduce the height difference of the bottom surface of the heart cam groove and can be downsized.

以下では、上記課題を解決するための手段を説明する。 Hereinafter, means for solving the above problems will be described.

即ち、請求項１においては、第一対象物に固定される固定部材と、突出位置から第一落下段差を経て第一中間位置に至る第一カム溝、前記第一中間位置から第二落下段差を経て没入位置に至る第二カム溝、前記没入位置から第三落下段差を経て第二中間位置に至る第三カム溝ならびに前記第二中間位置から第四落下段差を経て前記突出位置に至る第四カム溝を有するハートカム溝が形成されるハートカム部、および前記ハートカム部に連なるとともに第二対象物を着脱可能に係止する係止部、を備え、前記係止部が前記固定部材から突出する突出方向および前記係止部が前記固定部材に没入する没入方向に移動可能に前記固定部材に支持される移動部材と、一端部が前記固定部材に固定され、他端部が前記ハートカム溝の底面に当接しつつ前記ハートカム溝に係合し、当該他端部が前記突出位置において前記ハートカム溝に係合することにより前記移動部材を前記固定部材から突出した位置で支持し、当該他端部が前記没入位置において前記ハートカム溝に係合することにより前記移動部材を前記固定部材に没入した位置で支持する係合部材と、前記移動部材を前記突出方向に付勢する付勢部材と、を具備し、前記第二カム溝の底面のうち第一中間位置から前記第二落下段差に至るまでの部分は第一中間位置から前記第二落下段差に向かう上り坂であり、前記第三カム溝の底面のうち前記没入位置から前記第三落下段差に至るまでの部分は前記没入位置から前記第三落下段差に向かう上り坂であり、前記第一カム溝における前記突出位置から前記第一落下段差の直前までの底面高さの高低差である第一高低差は、前記第二カム溝における前記第一中間位置から前記第二落下段差の直前までの底面高さの高低差である第二高低差、及び、前記第三カム溝における前記没入位置から前記第三落下段差の直前までの底面高さの高低差である第三高低差、の何れよりも大きく形成される。 That is, in claim 1, the fixing member fixed to the first object, the first cam groove from the protruding position to the first intermediate position through the first drop step, and the second drop step from the first intermediate position. Through the second cam groove reaching the immersive position, the third cam groove from the immersive position through the third drop step to the second intermediate position, and the second cam groove from the second intermediate position through the fourth drop step to the protruding position. A heart cam portion having a heart cam groove having four cam grooves, and a locking portion connected to the heart cam portion and detachably locking the second object, wherein the locking portion protrudes from the fixing member. A moving member supported by the fixing member so as to be movable in a protruding direction and an immersion direction in which the locking portion is immersed in the fixing member, one end portion is fixed to the fixing member, and the other end portion is a bottom surface of the heart cam groove While contacting the front The movable member is engaged with the heart cam groove, and the other end is engaged with the heart cam groove at the protruding position to support the moving member at a position protruding from the fixed member, and the other end is at the retracted position. An engaging member that supports the moving member at a position immersed in the fixed member by engaging with a heart cam groove; and an urging member that urges the moving member in the projecting direction. A portion of the bottom surface of the cam groove from the first intermediate position to the second drop step is an uphill from the first intermediate position to the second drop step, and the immersion is made in the bottom surface of the third cam groove. portion from position to said third drop step is Ri uphill der toward the third falling step from the retracted position, the bottom surface from the projecting position in the first cam groove until shortly before the first drop step height The first height difference which is the height difference is the second height difference which is the height difference of the bottom surface from the first intermediate position in the second cam groove to immediately before the second drop step, and the third cam. It is formed larger than any of the third height difference, which is the height difference of the bottom surface height from the immersion position in the groove to immediately before the third drop step.

請求項２においては、前記第一カム溝における前記第一落下段差の直前の底面高さは、前記第二カム溝における前記第二落下段差の直前の底面高さよりも大きく、前記第二カム溝における前記第二落下段差の直前の底面高さは、前記第三カム溝における前記第三落下段差の直前の底面高さよりも大きい。 The bottom surface height of the first cam groove immediately before the first drop step is greater than the bottom surface height of the second cam groove immediately before the second drop step, and the second cam groove The bottom surface height immediately before the second drop step is greater than the bottom surface height of the third cam groove just before the third drop step.

請求項３においては、前記係合部材の他端部が前記ハートカム溝の底面に当接する方向に前記係合部材を付勢する副付勢部材を具備する。 According to a third aspect of the present invention, there is provided a sub-urging member that urges the engaging member in a direction in which the other end portion of the engaging member is in contact with the bottom surface of the heart cam groove.

本発明は、ハートカム溝の底面の高低差を小さくし、ひいては小型化が可能である、という効果を奏する。 The present invention has an effect that the difference in height of the bottom surface of the heart cam groove can be reduced, and the size can be reduced.

（ａ）本発明に係るプッシュラッチの実施の一形態を示す左前上方からの斜視図、（ｂ）本発明に係るプッシュラッチの実施の一形態を示す右後下方からの斜視図。(A) The perspective view from the upper left front which shows one embodiment of the push latch concerning the present invention, (b) The perspective view from the lower right rear which shows one embodiment of the push latch concerning the present invention. 本発明に係るプッシュラッチの実施の一形態を示す左前上方からの分解斜視図。The disassembled perspective view from upper left front which shows one Embodiment of the push latch which concerns on this invention. 本発明に係るプッシュラッチの実施の一形態を示す左側面断面図。The left side sectional view showing one embodiment of the push latch concerning the present invention. （ａ）ベース部材を示す左前上方からの斜視図、（ｂ）ベース部材を示す右後下方からの斜視図。(A) Perspective view from upper left front showing base member, (b) Perspective view from lower right rear showing base member. （ａ）ベース部材を示す正面図、（ｂ）ベース部材を示す平面図。(A) The front view which shows a base member, (b) The top view which shows a base member. （ａ）ケース部材を示す左前上方からの斜視図、（ｂ）ケース部材を示す右後下方からの斜視図。(A) The perspective view from the upper left front which shows a case member, (b) The perspective view from the lower right rear which shows a case member. （ａ）ケース部材を示す正面図、（ｂ）ベース部材を示す背面図。(A) The front view which shows a case member, (b) The rear view which shows a base member. （ａ）ケース部材の内部を示す斜視図、（ｂ）ケース部材の後端部を示す要部斜視図。(A) The perspective view which shows the inside of a case member, (b) The principal part perspective view which shows the rear-end part of a case member. （ａ）移動本体を示す左前上方からの斜視図、（ｂ）移動本体を示す右後下方からの斜視図。(A) The perspective view from the upper left front which shows a movement main body, (b) The perspective view from the lower right rear which shows a movement main body. （ａ）移動本体を示す正面図、（ｂ）移動本体を示す背面図。(A) The front view which shows a moving main body, (b) The rear view which shows a moving main body. （ａ）ハートカム部を示す要部斜視図、（ｂ）同じくハートカム部を示す別方向からの要部斜視図。(A) The principal part perspective view which shows a heart cam part, (b) The principal part perspective view from another direction which similarly shows a heart cam part. （ａ）突出姿勢における移動部材、係合ピンおよびケース部材を示す要部平面図、（ｂ）第一押込姿勢における移動部材、係合ピンおよびケース部材を示す要部平面図。(A) The principal part top view which shows the moving member, engagement pin, and case member in a protrusion attitude | position, (b) The principal part top view which shows the movement member, engagement pin, and case member in a 1st pushing attitude | position. （ａ）没入姿勢における移動部材、係合ピンおよびケース部材を示す要部平面図、（ｂ）第一押込姿勢における移動部材、係合ピンおよびケース部材を示す要部平面図。(A) The principal part top view which shows the moving member, engagement pin, and case member in an immersion position, (b) The principal part top view which shows the movement member, engagement pin, and case member in a 1st pushing attitude | position. （ａ）突出姿勢かつベース部材がケース部材の前半部に螺合しているときにおける本発明に係るプッシュラッチの一形態を示す左側面図、（ｂ）突出姿勢かつベース部材がケース部材の後半部に螺合しているときにおける本発明に係るプッシュラッチの一形態を示す左側面図。(A) Left side view showing one embodiment of the push latch according to the present invention when the protruding posture and the base member are screwed into the front half of the case member, (b) The protruding posture and the base member is the latter half of the case member The left view which shows one form of the push latch based on this invention when it is screwing together in a part. （ａ）第一押込姿勢（第二押込姿勢）かつベース部材がケース部材の前半部に螺合しているときにおける本発明に係るプッシュラッチの一形態を示す左側面図、（ｂ）没入姿勢かつベース部材がケース部材の前半部に螺合しているときにおける本発明に係るプッシュラッチの一形態を示す左側面図。(A) Left side view showing one embodiment of the push latch according to the present invention when the first pushing posture (second pushing posture) and the base member are screwed into the front half of the case member, (b) the immersion posture And the left view which shows one form of the push latch based on this invention when a base member is screwing together in the front half part of a case member. （ａ）本発明に係るプッシュラッチの実施の一形態におけるハートカム溝を示す平面模式図、（ｂ）本発明に係るプッシュラッチの実施の一形態におけるハートカム溝の底面の高さを示す図。(A) The plane schematic diagram which shows the heart cam groove in one Embodiment of the push latch which concerns on this invention, (b) The figure which shows the height of the bottom face of the heart cam groove in one Embodiment of the push latch which concerns on this invention. （ａ）従来のプッシュラッチにおけるハートカム溝を示す平面模式図、（ｂ）従来のプッシュラッチにおけるハートカム溝の底面の高さを示す図。(A) The plane schematic diagram which shows the heart cam groove in the conventional push latch, (b) The figure which shows the height of the bottom face of the heart cam groove in the conventional push latch.

以下では図面を参照しつつ、本発明に係るプッシュラッチの実施の一形態であるプッシュラッチ１について説明する。なお、以下では便宜上、図１に示す上下方向、前後方向および左右方向を用いてプッシュラッチ１の各部を説明するが、プッシュラッチ１の使用時の姿勢はこれらの方向に限定されない。 Hereinafter, a push latch 1 which is an embodiment of a push latch according to the present invention will be described with reference to the drawings. In the following, for the sake of convenience, each part of the push latch 1 will be described using the up-down direction, the front-rear direction, and the left-right direction shown in FIG. 1, but the posture of the push latch 1 in use is not limited to these directions.

本実施形態のプッシュラッチ１は、例えば家具の本体に回動可能に連結された扉を係止する（家具の本体に対して閉じた状態を保持する）用途等に用いられるものである。
ここで、「家具の本体」は本発明に係る第一対象物の実施の一形態であり、「家具の扉」は本発明に係る第二対象物の実施の一形態である。家具の具体例としては、箪笥、本棚、食器棚、洗面台、机等が挙げられる。なお、本発明に係るプッシュラッチが適用される二つの物品（第一対象物および第二対象物）は回動可能に連結されていても良く、回動可能に連結されていなくても良い。 The push latch 1 according to the present embodiment is used for, for example, a purpose of locking a door that is rotatably connected to a furniture main body (holding a closed state with respect to the furniture main body).
Here, the “furniture body” is an embodiment of the first object according to the present invention, and the “furniture door” is an embodiment of the second object according to the present invention. Specific examples of furniture include bags, bookshelves, cupboards, washstands, desks, and the like. Note that the two articles (the first object and the second object) to which the push latch according to the present invention is applied may be rotatably connected or may not be rotatably connected.

図１および図２に示す如く、プッシュラッチ１は固定部材１０、移動部材２０、係合ピン３０、バネ４０および係止リング５０を具備する。 As shown in FIGS. 1 and 2, the push latch 1 includes a fixing member 10, a moving member 20, an engagement pin 30, a spring 40, and a locking ring 50.

固定部材１０は本発明に係る固定部材の実施の一形態である。本実施形態の固定部材１０はベース部材１１およびケース部材１６を備える。 The fixing member 10 is an embodiment of the fixing member according to the present invention. The fixing member 10 of this embodiment includes a base member 11 and a case member 16.

図４および図５に示す如く、ベース部材１１は本体部および当該本体部の下部からそれぞれ左右側方に張り出した一対の板状のウイング部を備える。本実施形態のベース部材１１は樹脂材料を一体成形することにより製造される。
ベース部材１１の本体部には前後方向に貫通する貫通孔１１ａが形成され、貫通孔１１ａの内周面には雌ネジが形成される。また、貫通孔１１ａの内周面にはその先端部が貫通孔１１ａの内側に向かって弾性的に突出した突起１１ｂが形成される（図５の（ａ）参照）。
ベース部材１１の一対のウイング部にはそれぞれ上下に貫通する貫通孔１１ｃ・１１ｄ・１１ｅ・１１ｆが形成される。貫通孔１１ｃ・１１ｄ・１１ｅ・１１ｆにネジ（不図示）を貫装し、これらのネジを家具の本体（不図示）に形成されたネジ穴にねじ込むことにより、ベース部材１１、ひいては固定部材１０が家具の本体に固定される。 As shown in FIGS. 4 and 5, the base member 11 includes a main body portion and a pair of plate-like wing portions projecting left and right from the lower portion of the main body portion. The base member 11 of this embodiment is manufactured by integrally molding a resin material.
A through hole 11a penetrating in the front-rear direction is formed in the main body of the base member 11, and a female screw is formed on the inner peripheral surface of the through hole 11a. In addition, a protrusion 11b is formed on the inner peripheral surface of the through hole 11a, the tip of which protrudes elastically toward the inside of the through hole 11a (see FIG. 5A).
The pair of wing portions of the base member 11 are formed with through holes 11c, 11d, 11e, and 11f that penetrate vertically. Screws (not shown) are inserted into the through holes 11c, 11d, 11e, and 11f, and these screws are screwed into screw holes formed in the main body (not shown) of the furniture. Is fixed to the main body of the furniture.

図６、図７および図８に示す如く、ケース部材１６は前後方向に延びた概ね円筒形状の部材である。ケース部材１６の前端部は大きく開口し、ケース部材１６の内部に形成された空間と外部とを連通している。ケース部材１６の内周面には前後方向に延びた計四本のガイド溝１６ａ・１６ａ・１６ａ・１６ａが形成される。ケース部材１６の外周面には雄ネジが形成されるとともに、前後方向に延びた計四本の係止溝１６ｂ・１６ｂ・１６ｂ・１６ｂが形成される。また、ケース部材１６の外周面の前端部には周方向に並んだ歯車状の突起が形成される。図７の（ｂ）および図８の（ｂ）に示す如く、ケース部材１６の後端部は底板により概ね閉塞され、当該底板における後側の板面の中央部には、後方に突出する突起１６ｃが形成される。また、突起１６ｃにはその上面に開口する固定穴１６ｄが形成される。ケース部材１６の底板の上半部にはケース部材１６の内部の空間と外部とを連通する連通孔１６ｅが形成される。図７の（ａ）および図８の（ａ）に示す如く、ケース部材１６の底板における前側の板面の下半部には、前方に突出するバネ受け突起１６ｆが形成される。 As shown in FIGS. 6, 7 and 8, the case member 16 is a substantially cylindrical member extending in the front-rear direction. The front end portion of the case member 16 is greatly opened, and the space formed inside the case member 16 communicates with the outside. A total of four guide grooves 16 a, 16 a, 16 a, and 16 a extending in the front-rear direction are formed on the inner peripheral surface of the case member 16. A male screw is formed on the outer peripheral surface of the case member 16, and a total of four locking grooves 16b, 16b, 16b, and 16b extending in the front-rear direction are formed. In addition, gear-shaped protrusions arranged in the circumferential direction are formed on the front end portion of the outer peripheral surface of the case member 16. As shown in FIGS. 7B and 8B, the rear end portion of the case member 16 is substantially closed by a bottom plate, and a protrusion projecting rearward is provided at the center of the rear plate surface of the bottom plate. 16c is formed. Further, the protrusion 16c is formed with a fixing hole 16d opened on the upper surface thereof. A communication hole 16e is formed in the upper half of the bottom plate of the case member 16 to communicate the space inside the case member 16 with the outside. As shown in FIGS. 7A and 8A, a spring receiving projection 16 f that projects forward is formed on the lower half of the front plate surface of the bottom plate of the case member 16.

図１および図１４に示す如く、ケース部材１６をベース部材１１の貫通孔にねじ込むことにより、ケース部材１６はベース部材１１に支持される。また、図１４の（ａ）および（ｂ）に示す如く、ベース部材１１の貫通孔へのケース部材１６のねじ込み量を調整することにより、ベース部材１１に対するケース部材１６の前端部（ひいては、家具の扉を係止する位置である移動部材２０の前端部）の前後方向における位置を調整することが可能である。なお、ケース部材１６がベース部材１１の貫通孔にねじ込まれたとき、ベース部材１１の突起１１ｂ（図５の（ａ）参照）がケース部材１６の外周面に形成された係止溝１６ｂ・１６ｂ・１６ｂ・１６ｂのいずれかに嵌合することにより、或る大きさ以上のトルク（突起１１ｂを弾性変形させることにより突起１１ｂが係止溝１６ｂに嵌合した状態を解除可能なトルク）が作用した場合に限りベース部材１１に対してケース部材１６が相対回転することを許容し、ひいては使用者が気づかないうちにベース部材１１に対するケース部材１６の前端部の前後方向における位置が変動することを防止する。 As shown in FIGS. 1 and 14, the case member 16 is supported by the base member 11 by screwing the case member 16 into the through hole of the base member 11. Further, as shown in FIGS. 14A and 14B, by adjusting the screwing amount of the case member 16 into the through hole of the base member 11, the front end portion of the case member 16 with respect to the base member 11 (and thus the furniture) It is possible to adjust the position in the front-rear direction of the front end portion of the moving member 20, which is a position for locking the door. When the case member 16 is screwed into the through hole of the base member 11, the protrusion 11 b (see FIG. 5A) of the base member 11 is formed in the locking grooves 16 b and 16 b formed on the outer peripheral surface of the case member 16.・ A torque of a certain magnitude or more (torque that can release the state in which the protrusion 11b is fitted in the locking groove 16b by elastically deforming the protrusion 11b) is applied by fitting into any of 16b and 16b. The case member 16 is allowed to rotate relative to the base member 11 only in the case where the base member 11 is rotated, and the position of the front end portion of the case member 16 with respect to the base member 11 changes in the front-rear direction without the user's knowledge. To prevent.

図１および図２に示す移動部材２０は本発明に係る移動部材の実施の一形態である。
移動部材２０は移動本体２１、磁石部材２５およびヨーク部材２６・２７を備える。 The moving member 20 shown in FIGS. 1 and 2 is an embodiment of the moving member according to the present invention.
The moving member 20 includes a moving main body 21, a magnet member 25, and yoke members 26 and 27.

以下では図９、図１０および図１１を用いて移動本体２１の詳細について説明する。移動本体２１は前後方向に延びた概ね円柱形状の部材であり、樹脂材料を一体成形することにより製造される。本実施形態の移動部材２０はハートカム部２２、胴体部２３および四本のガイド突起２４・２４・２４・２４を備える。 Below, the detail of the movement main body 21 is demonstrated using FIG.9, FIG10 and FIG.11. The movable body 21 is a generally cylindrical member extending in the front-rear direction, and is manufactured by integrally molding a resin material. The moving member 20 of the present embodiment includes a heart cam portion 22, a body portion 23, and four guide protrusions 24, 24, 24, and 24.

ハートカム部２２は本発明に係るハートカム部の実施の一形態である。本実施形態のハートカム部２２は移動本体２１の後半部を成す。ハートカム部２２にはハートカム溝７０が形成される。図９の（ａ）および図１１に示す如く、ハートカム溝７０はハートカム部２２の外周面の上方に向かって開口する概ねハート形を成す無端状の溝である。ハートカム溝７０はハートカム溝７０の開口部分から下方に延びる一対の壁面、およびこれら一対の壁面の下端部を繋ぐ底面を有する。 The heart cam portion 22 is an embodiment of the heart cam portion according to the present invention. The heart cam portion 22 of this embodiment constitutes the latter half of the moving body 21. A heart cam groove 70 is formed in the heart cam portion 22. As shown in FIGS. 9A and 11, the heart cam groove 70 is a substantially heart-shaped endless groove that opens upward from the outer peripheral surface of the heart cam portion 22. The heart cam groove 70 has a pair of wall surfaces extending downward from the opening portion of the heart cam groove 70 and a bottom surface connecting the lower ends of the pair of wall surfaces.

以下ではハートカム溝７０の詳細について説明する。図１１および図１６の（ａ）に示す如く、ハートカム溝７０は第一カム溝７１、第二カム溝７２、第三カム溝７３および第四カム溝７４の四つの溝を有し、これらが順に繋がった形状を成す。 Details of the heart cam groove 70 will be described below. As shown in FIG. 11 and FIG. 16A, the heart cam groove 70 has four grooves, a first cam groove 71, a second cam groove 72, a third cam groove 73, and a fourth cam groove 74. Forms connected in order.

第一カム溝７１はハートカム溝７０の後端部から右前端部にかけての部分を成し、第一カム溝７１の一端部（後端部）は突出位置（図１６の（ａ）におけるＡ１参照）に連なり、第一カム溝７１の他端部（前端部）は第一中間位置（図１６の（ａ）におけるＢ１参照）に連なる。また、図１１および図１６に示す如く、第一カム溝７１の底面（ハートカム溝７０の底面のうち第一カム溝７１に対応する部分）の中途部には第一落下段差７１ａが形成される。
従って、第一カム溝７１はハートカム溝７０のうち突出位置（Ａ１）から第一落下段差７１ａを経て第一中間位置（Ｂ１）に至る部分を成す。
第一カム溝７１の底面のうち突出位置（Ａ１）から第一落下段差７１ａに至るまでの部分は突出位置（Ａ１）から第一落下段差７１ａに向かう上り坂である。そして、第一落下段差７１ａを境界として「第一カム溝７１の底面のうち第一中間位置（Ｂ１）寄りの部分」が「第一カム溝７１の底面のうち突出位置（Ａ１）寄りの部分」よりも低くなっている。 The first cam groove 71 forms a portion from the rear end portion of the heart cam groove 70 to the right front end portion, and one end portion (rear end portion) of the first cam groove 71 is a protruding position (see A1 in FIG. 16A). ), And the other end portion (front end portion) of the first cam groove 71 is continued to the first intermediate position (see B1 in FIG. 16A). Further, as shown in FIGS. 11 and 16, a first drop step 71a is formed in the middle of the bottom surface of the first cam groove 71 (the portion corresponding to the first cam groove 71 in the bottom surface of the heart cam groove 70). .
Accordingly, the first cam groove 71 forms a part of the heart cam groove 70 from the protruding position (A1) to the first intermediate position (B1) through the first drop step 71a.
Of the bottom surface of the first cam groove 71, the portion from the protruding position (A1) to the first falling step 71a is an uphill from the protruding position (A1) toward the first falling step 71a. Then, “a portion near the first intermediate position (B1) of the bottom surface of the first cam groove 71” is “a portion of the bottom surface of the first cam groove 71 near the protruding position (A1) with the first drop step 71a as a boundary. Is lower than.

第二カム溝７２はハートカム溝７０の右前端部から中央前部にかけての部分を成し、第二カム溝７２の一端部（右前端部）は第一中間位置（Ｂ１）に連なり、第二カム溝７２の他端部（左後端部）は没入位置（図１６の（ａ）におけるＣ１参照）に連なる。また、図１１および図１６に示す如く、第二カム溝７２の底面（ハートカム溝７０の底面のうち第二カム溝７２に対応する部分）の中途部には第二落下段差７２ａが形成される。
従って、第二カム溝７２はハートカム溝７０のうち第一中間位置（Ｂ１）から第二落下段差７２ａを経て没入位置（Ｃ１）に至る部分を成す。
第二カム溝７２の底面のうち第一中間位置（Ｂ１）から第二落下段差７２ａに至るまでの部分は第一中間位置（Ｂ１）から第二落下段差７２ａに向かう上り坂である。そして、第二落下段差７２ａを境界として「第二カム溝７２の底面のうち没入位置（Ｃ１）寄りの部分」が「第二カム溝７２の底面のうち第一中間位置（Ｂ１）寄りの部分」よりも低くなっている。 The second cam groove 72 forms a portion from the right front end portion to the center front portion of the heart cam groove 70, and one end portion (right front end portion) of the second cam groove 72 is connected to the first intermediate position (B1). The other end portion (left rear end portion) of the cam groove 72 is connected to the immersion position (see C1 in FIG. 16A). Also, as shown in FIGS. 11 and 16, a second drop step 72a is formed in the middle of the bottom surface of the second cam groove 72 (the portion corresponding to the second cam groove 72 in the bottom surface of the heart cam groove 70). .
Accordingly, the second cam groove 72 forms a part of the heart cam groove 70 from the first intermediate position (B1) to the immersion position (C1) through the second drop step 72a.
Of the bottom surface of the second cam groove 72, the portion from the first intermediate position (B1) to the second drop step 72a is an uphill from the first intermediate position (B1) to the second drop step 72a. Then, with the second drop step 72 a as a boundary, “the portion of the bottom surface of the second cam groove 72 near the immersion position (C1)” is “the portion of the bottom surface of the second cam groove 72 near the first intermediate position (B1)” Is lower than.

第三カム溝７３はハートカム溝７０の中央前部から左前端部にかけての部分を成し、第三カム溝７３の一端部（右後端部）は没入位置（Ｃ１）に連なり、第三カム溝７３の他端部（左前端部）は第二中間位置（図１６の（ａ）におけるＤ１参照）に連なる。また、図１１および図１６に示す如く、第三カム溝７３の底面（ハートカム溝７０の底面のうち第三カム溝７３に対応する部分）の中途部には第三落下段差７３ａが形成される。
従って、第三カム溝７３はハートカム溝７０のうち没入位置（Ｃ１）から第三落下段差７３ａを経て第二中間位置（Ｄ１）に至る部分を成す。
第三カム溝７３の底面のうち没入位置（Ｃ１）から第三落下段差７３ａに至るまでの部分は没入位置（Ｃ１）から第三落下段差７３ａに向かう上り坂である。そして、第三落下段差７３ａを境界として「第三カム溝７３の底面のうち第二中間位置（Ｄ１）寄りの部分」が「第三カム溝７３の底面のうち没入位置（Ｃ１）寄りの部分」よりも低くなっている。 The third cam groove 73 forms a portion from the center front portion to the left front end portion of the heart cam groove 70, and one end portion (right rear end portion) of the third cam groove 73 is connected to the immersion position (C1). The other end portion (left front end portion) of the groove 73 is connected to the second intermediate position (see D1 in FIG. 16A). Also, as shown in FIGS. 11 and 16, a third drop step 73a is formed in the middle of the bottom surface of the third cam groove 73 (the portion corresponding to the third cam groove 73 in the bottom surface of the heart cam groove 70). .
Accordingly, the third cam groove 73 forms a portion of the heart cam groove 70 that extends from the immersion position (C1) to the second intermediate position (D1) through the third drop step 73a.
Of the bottom surface of the third cam groove 73, the portion from the immersive position (C1) to the third drop step 73a is an uphill from the immersion position (C1) to the third drop step 73a. Then, “the portion of the bottom surface of the third cam groove 73 near the second intermediate position (D1)” is “the portion of the bottom surface of the third cam groove 73 near the immersion position (C1) with the third drop step 73a as a boundary. Is lower than.

第四カム溝７４はハートカム溝７０の左前端部から後端部にかけての部分を成し、第四カム溝７４の一端部（前端部）は第二中間位置（Ｄ１）に連なり、第四カム溝７４の他端部（後端部）は突出位置（Ａ１）に連なる。また、図１１および図１６に示す如く、第四カム溝７４の底面（ハートカム溝７０の底面のうち第四カム溝７４に対応する部分）の中途部には第四落下段差７４ａが形成される。
従って、第四カム溝７４はハートカム溝７０のうち第二中間位置（Ｄ１）から第四落下段差７４ａおよび合流位置（図１６の（ａ）におけるＥ１参照）を経て突出位置（Ａ１）に至る部分を成す。
第四カム溝７４の底面のうち第二中間位置（Ｄ１）から第四落下段差７４ａに至るまでの部分は第二中間位置（Ｄ１）から第四落下段差７４ａに向かう上り坂である。そして、第四落下段差７４ａを境界として「第四カム溝７４の底面のうち突出位置（Ａ１）寄りの部分」が「第四カム溝７４の底面のうち第二中間位置（Ｄ１）寄りの部分」よりも低くなっている。 The fourth cam groove 74 forms a portion from the left front end portion to the rear end portion of the heart cam groove 70, and one end portion (front end portion) of the fourth cam groove 74 is connected to the second intermediate position (D1). The other end (rear end) of the groove 74 continues to the protruding position (A1). As shown in FIGS. 11 and 16, a fourth drop step 74a is formed in the middle of the bottom surface of the fourth cam groove 74 (the portion corresponding to the fourth cam groove 74 in the bottom surface of the heart cam groove 70). .
Accordingly, the fourth cam groove 74 is a portion of the heart cam groove 70 that extends from the second intermediate position (D1) to the protruding position (A1) through the fourth drop step 74a and the merge position (see E1 in FIG. 16A). Is made.
The portion from the second intermediate position (D1) to the fourth drop step 74a in the bottom surface of the fourth cam groove 74 is an uphill from the second intermediate position (D1) to the fourth drop step 74a. Then, “the portion of the bottom surface of the fourth cam groove 74 near the protruding position (A1)” is “the portion of the bottom surface of the fourth cam groove 74 near the second intermediate position (D1) with the fourth drop step 74a as a boundary. Is lower than.

図９の（ｂ）および図１０の（ｂ）に示す如く、ハートカム部２２にはバネ受け凹部２２ａが形成される。バネ受け凹部２２ａはハートカム部２２の後端面および外周面下部に開口する窪みである。 As shown in FIGS. 9B and 10B, the heart cam portion 22 is formed with a spring receiving recess 22a. The spring receiving recess 22a is a recess that opens to the rear end surface of the heart cam portion 22 and the lower portion of the outer peripheral surface.

胴体部２３は移動本体２１の前半部を成し、ハートカム部２２の前方に連なる。胴体部２３の前端部はフランジ状に成形される。また、胴体部２３の前端部には胴体部２３の前端面に開口する収容穴２３ａが形成される。胴体部２３には胴体部２３の外周面の前端部かつ左右端部から収容穴２３ａの内周面まで貫通する一対の貫通孔２３ｂ・２３ｂが形成される。 The body portion 23 forms the front half of the moving main body 21 and continues in front of the heart cam portion 22. The front end portion of the body portion 23 is formed in a flange shape. In addition, an accommodation hole 23 a that opens to the front end surface of the body part 23 is formed at the front end part of the body part 23. The body portion 23 is formed with a pair of through holes 23b and 23b penetrating from the front end portion and the left and right end portions of the outer peripheral surface of the body portion 23 to the inner peripheral surface of the accommodation hole 23a.

図９に示す如く、四本のガイド突起２４・２４・２４・２４は前後方向に延びた形状の突起（突条）であり、ハートカム部２２および胴体部２３に跨って設けられ、これらの外周面の左上部、右上部、左下部、右下部に配置される。なお、四本のガイド突起２４・２４・２４・２４のうち、ハートカム部２２および胴体部２３の外周面の左上部および右上部に形成されたガイド突起２４・２４の前後方向における中途部はハートカム溝７０との干渉を避けるために省略（切除）されている。 As shown in FIG. 9, the four guide protrusions 24, 24, 24, 24 are protrusions (projections) extending in the front-rear direction, and are provided across the heart cam portion 22 and the body portion 23, and the outer periphery thereof. Arranged at the upper left, upper right, lower left, and lower right of the surface. Of the four guide projections 24, 24, 24, 24, the middle portions in the front-rear direction of the guide projections 24, 24 formed on the upper left and upper right portions of the outer peripheral surfaces of the heart cam portion 22 and the body portion 23 are heart cams. Omitted (removed) to avoid interference with the groove 70.

図２に示す磁石部材２５は永久磁石からなる。本実施形態の磁石部材２５は上面、下面、前面、後面、左面および右面を有する直方体形状の部材である。ここで、「永久磁石」は、自発的に（外部から磁場あるいは電流が供給されない状態で）磁化し、周囲に磁場を発生させる（ひいては、磁力を発生させる）性質を有する物体であり、通常は強磁性体からなる。永久磁石の具体例としては、アルニコ磁石、ＫＳ鋼、ＭＫ鋼、フェライト磁石、サマリウムコバルト磁石、ネオジム磁石等、既知の種々の磁石が挙げられる。 The magnet member 25 shown in FIG. 2 consists of a permanent magnet. The magnet member 25 of this embodiment is a rectangular parallelepiped member having an upper surface, a lower surface, a front surface, a rear surface, a left surface, and a right surface. Here, the “permanent magnet” is an object having the property of spontaneously magnetizing (in a state where no magnetic field or current is supplied from the outside) and generating a magnetic field in the surroundings (and thus generating a magnetic force). Made of ferromagnetic material. Specific examples of the permanent magnet include various known magnets such as alnico magnet, KS steel, MK steel, ferrite magnet, samarium cobalt magnet, neodymium magnet and the like.

ヨーク部材２６・２７はいずれも常磁性（外部から磁場が作用しないときには磁化せず、外部から磁場が作用したときには磁化する性質）の鉄鋼材料からなる。図２に示す如く、本実施形態のヨーク部材２６・２７は左右一対の板面を有する概ね矩形の板状の部材である。ヨーク部材２６の前端部は右側方に突出し、ヨーク部材２６の左側の板面における前後中央部には左側方に突出する係止突起２６ａが形成される。ヨーク部材２７の前端部は左側方に突出し、ヨーク部材２７の右側の板面における前後中央部には右側方に突出する係止突起２７ａが形成される。 The yoke members 26 and 27 are each made of a steel material that is paramagnetic (not magnetized when a magnetic field is not applied from the outside, and magnetized when a magnetic field is applied from the outside). As shown in FIG. 2, the yoke members 26 and 27 of this embodiment are substantially rectangular plate-like members having a pair of left and right plate surfaces. A front end portion of the yoke member 26 protrudes to the right side, and a locking projection 26 a protruding to the left side is formed at the front and rear central portion of the left plate surface of the yoke member 26. A front end portion of the yoke member 27 projects leftward, and a locking projection 27a projecting rightward is formed at the front and rear central portion of the right plate surface of the yoke member 27.

胴体部２３、磁石部材２５およびヨーク部材２６・２７を合わせたものは、本発明に係る係止部の実施の一形態に相当する。
図１の（ａ）および図２に示す如く、磁石部材２５およびヨーク部材２６・２７は、磁石部材２５の左右にそれぞれヨーク部材２６・２７が配置された姿勢で胴体部２３の収容穴２３ａに収容される。磁石部材２５およびヨーク部材２６・２７が収容穴２３ａに収容されたとき、ヨーク部材２６の係止突起２６ａおよびヨーク部材２７の係止突起２７ａが胴体部２３の貫通孔２３ｂ・２３ｂに嵌合し、磁石部材２５およびヨーク部材２６・２７は胴体部２３に脱落不能に支持され、かつヨーク部材２６・２７の前端部は胴体部２３の前端面よりもわずかに前方に突出している。また、このとき、ヨーク部材２６・２７は磁石部材２５が発生させる磁場により磁化している。
家具の扉（不図示）においてヨーク部材２６・２７に対向する部分を常磁性体からなる材料で構成することにより、家具の扉は磁化したヨーク部材２６・２７の前端面に着脱可能に吸着（係止）される。換言すれば、或る大きさ以上の外力（ヨーク部材２６・２７が発生させる吸着力を上回る外力）が家具の扉に作用しない場合には家具の扉がヨーク部材２６・２７の前端面（ひいては、プッシュラッチ１が固定された家具の本体（不図示））に吸着（係止）された状態が保持され、或る大きさ以上の外力が家具の扉に作用した場合には家具の扉がヨーク部材２６・２７の前端面に吸着（係止）された状態が解除される。 A combination of the body portion 23, the magnet member 25, and the yoke members 26 and 27 corresponds to an embodiment of the locking portion according to the present invention.
As shown in FIG. 1A and FIG. 2, the magnet member 25 and the yoke members 26, 27 are inserted into the receiving holes 23 a of the body portion 23 in such a posture that the yoke members 26, 27 are arranged on the left and right sides of the magnet member 25, respectively. Be contained. When the magnet member 25 and the yoke members 26 and 27 are accommodated in the accommodation hole 23a, the engagement protrusion 26a of the yoke member 26 and the engagement protrusion 27a of the yoke member 27 are fitted in the through holes 23b and 23b of the body portion 23. The magnet member 25 and the yoke members 26 and 27 are supported by the body portion 23 so as not to drop off, and the front end portions of the yoke members 26 and 27 protrude slightly forward from the front end surface of the body portion 23. At this time, the yoke members 26 and 27 are magnetized by the magnetic field generated by the magnet member 25.
A portion of the furniture door (not shown) opposed to the yoke members 26 and 27 is made of a material made of a paramagnetic material so that the furniture door is detachably attached to the front end surfaces of the magnetized yoke members 26 and 27 ( Locked). In other words, when an external force of a certain magnitude or larger (external force exceeding the suction force generated by the yoke members 26 and 27) does not act on the furniture door, the furniture door is connected to the front end surface (and eventually the yoke members 26 and 27). When the furniture body (not shown) to which the push latch 1 is fixed is held (locked) and the external force of a certain size or more acts on the furniture door, the furniture door The state of being attracted (locked) to the front end surfaces of the yoke members 26 and 27 is released.

図１および図２に示す如く、移動部材２０はケース部材１６の前端部に形成された開口部からケース部材１６の内部に形成された空間（以下、「ケース部材１６の内部空間」という。）に収容され、ケース部材１６（ひいては固定部材１０）に対して前後方向に移動可能に支持される。
移動部材２０がケース部材１６に支持されつつケース部材１６に対して前方に移動したとき、移動部材２０はケース部材１６の内部空間から前方に突出する（図１４参照）。
また、移動部材２０がケース部材１６に支持されつつケース部材１６に対して後方に移動したとき、移動部材２０はケース部材１６の内部空間に没入する（図１５参照）。
以下では便宜上、移動部材２０がケース部材１６（ひいては固定部材１０）に対して前方に移動することを「移動部材２０が突出方向に移動する」といい、移動部材２０がケース部材１６（ひいては固定部材１０）に対して後方に移動することを「移動部材２０が没入方向に移動する」という。
移動部材２０がケース部材１６の内部空間に収容されたとき、ガイド突起２９・２９・２９・２９はそれぞれガイド溝１６ａ・１６ａ・１６ａ・１６ａに嵌合するため、移動部材２０がケース部材１６に対して前後方向の軸中心に相対回転することは無い。 As shown in FIGS. 1 and 2, the moving member 20 is a space formed in the case member 16 from an opening formed in the front end portion of the case member 16 (hereinafter referred to as “internal space of the case member 16”). And is supported so as to be movable in the front-rear direction with respect to the case member 16 (and eventually the fixing member 10).
When the moving member 20 moves forward with respect to the case member 16 while being supported by the case member 16, the moving member 20 protrudes forward from the internal space of the case member 16 (see FIG. 14).
Further, when the moving member 20 moves backward with respect to the case member 16 while being supported by the case member 16, the moving member 20 is immersed in the internal space of the case member 16 (see FIG. 15).
Hereinafter, for the sake of convenience, the movement of the moving member 20 forward with respect to the case member 16 (and thus the fixed member 10) is referred to as “the moving member 20 moves in the protruding direction”, and the moving member 20 is referred to as the case member 16 (and thus fixed). Moving backward with respect to the member 10) is referred to as “the moving member 20 moves in the immersion direction”.
When the moving member 20 is accommodated in the internal space of the case member 16, the guide protrusions 29, 29, 29, and 29 are fitted into the guide grooves 16 a, 16 a, 16 a, and 16 a, respectively. On the other hand, there is no relative rotation about the longitudinal axis.

図２に示す係合ピン３０は本発明に係る係合部材の実施の一形態である。本実施形態の係合ピン３０は鋼線を適当な長さに切断し、適宜折り曲げることにより製造される。
係合ピン３０の中途部はその長手方向が概ね前後方向に平行であり、係合ピン３０の一端部（後端部）および他端部（前端部）はその長手方向が係合ピン３０の中途部の長手方向に対して概ね９０°となるように下方に折り曲げられる。図３に示す如く、係合ピン３０はケース部材１６の内部空間に収容される。このとき、係合ピン３０の一端部（後端部）はケース部材１６の連通孔１６ｅを通ってケース部材１６の外部に突出し、突起１６ｃに形成された固定穴１６ｄに嵌合する。また、係合ピン３０の他端部（前端部）は移動本体２１のハートカム部２２に形成されたハートカム溝７０の底面に当接しつつハートカム溝７０に係合する。 The engagement pin 30 shown in FIG. 2 is an embodiment of the engagement member according to the present invention. The engagement pin 30 of this embodiment is manufactured by cutting a steel wire into an appropriate length and bending it appropriately.
The middle part of the engagement pin 30 has a longitudinal direction substantially parallel to the front-rear direction, and one end part (rear end part) and the other end part (front end part) of the engagement pin 30 have a longitudinal direction of the engagement pin 30. It is bent downward so as to be approximately 90 ° with respect to the longitudinal direction of the midway part. As shown in FIG. 3, the engagement pin 30 is accommodated in the internal space of the case member 16. At this time, one end portion (rear end portion) of the engaging pin 30 protrudes to the outside of the case member 16 through the communication hole 16e of the case member 16, and is fitted into a fixing hole 16d formed in the protrusion 16c. Further, the other end portion (front end portion) of the engagement pin 30 engages with the heart cam groove 70 while abutting against the bottom surface of the heart cam groove 70 formed in the heart cam portion 22 of the moving body 21.

図２に示すバネ４０は本発明に係る付勢部材の実施の一形態である。本実施形態のバネ４０はバネ鋼からなる圧縮コイルバネである。図３に示す如く、バネ４０は移動本体２１のハートカム部２２に形成されたバネ受け凹部２２ａに嵌合した状態でケース部材１６の内部空間に収容される。このとき、バネ４０は圧縮される方向に弾性変形しており、バネ４０の一端部（後端部）はバネ受け突起１６ｆに嵌装され、バネ４０の他端部（前端部）はバネ受け凹部２２ａの前側の端面に当接している。従って、バネ４０は弾性力（弾性変形したバネ４０が元の形状に戻ろうとする力）により移動本体２１（ひいては移動部材２０）をケース部材１６（ひいては固定部材１０）に対して突出方向（前方）に付勢する。 A spring 40 shown in FIG. 2 is an embodiment of the biasing member according to the present invention. The spring 40 of this embodiment is a compression coil spring made of spring steel. As shown in FIG. 3, the spring 40 is accommodated in the internal space of the case member 16 in a state where the spring 40 is fitted in a spring receiving recess 22 a formed in the heart cam portion 22 of the moving body 21. At this time, the spring 40 is elastically deformed in the compressing direction, one end (rear end) of the spring 40 is fitted to the spring receiving projection 16f, and the other end (front end) of the spring 40 is spring received. It contacts the front end surface of the recess 22a. Therefore, the spring 40 projects the moving body 21 (and hence the moving member 20) with respect to the case member 16 (and thus the fixing member 10) (frontward) by elastic force (force that the elastically deformed spring 40 tries to return to its original shape). ).

図２に示す係止リング５０は本発明に係る副付勢部材の実施の一形態である。
図１の（ｂ）および図３に示す如く、係止リング５０はその直径が大きくなる方向に弾性変形しつつ、ケース部材１６の突起１６ｃおよび係合ピン３０の中途部において後端部（下方に屈曲して固定孔１６ｄに嵌合している部分）寄りとなる部分に嵌合する。
従って、係止リング５０は弾性力（弾性変形した係止リング５０が元の形状に戻ろうとする力）により係合ピン３０の前端部（他端部）を下方（すなわち、係合ピン３０の前端部（他端部）がハートカム溝７０の底面に当接する方向）に付勢する。
また、係止リング５０により、係合ピン３０の後端部（一端部）はケース部材１６（ひいては固定部材１０）に脱落不能に固定される。 A locking ring 50 shown in FIG. 2 is an embodiment of a sub biasing member according to the present invention.
As shown in FIGS. 1B and 3, the locking ring 50 is elastically deformed in the direction in which the diameter increases, and the rear end portion (downward) of the projection 16 c of the case member 16 and the engagement pin 30 is located in the middle. And is fitted to a portion closer to the fixing hole 16d.
Therefore, the locking ring 50 is moved downward (that is, the engagement pin 30 of the engagement pin 30) by the elastic force (the force by which the elastically deformed locking ring 50 tries to return to the original shape). The front end portion (the other end portion) is biased in a direction in which the front end portion (the other end portion abuts against the bottom surface of the heart cam groove 70).
Further, the rear end portion (one end portion) of the engaging pin 30 is fixed to the case member 16 (and thus the fixing member 10) by the locking ring 50 so as not to drop off.

以下では図１２から図１６を用いてプッシュラッチ１の動作を説明する。なお、以下では便宜上、図１２の（ａ）および図１４の（ａ）に示す「突出姿勢」を初期状態とする。 Hereinafter, the operation of the push latch 1 will be described with reference to FIGS. In the following, for the sake of convenience, the “projection posture” shown in FIGS. 12A and 14A is assumed to be the initial state.

図１２の（ａ）および図１４の（ａ）に示す如く、プッシュラッチ１が「突出姿勢」のとき、係合ピン３０の他端部（前端部）は突出位置（Ａ１）に配置され、突出位置（Ａ１）においてハートカム溝７０に係合し、かつハートカム溝７０の底面に当接する。
その結果、移動部材２０は係合ピン３０により固定部材１０（ケース部材１６）から突出した位置で支持される。 As shown in FIGS. 12A and 14A, when the push latch 1 is in the “protruding posture”, the other end portion (front end portion) of the engaging pin 30 is disposed at the protruding position (A1). It engages with the heart cam groove 70 at the protruding position (A1), and abuts against the bottom surface of the heart cam groove 70.
As a result, the moving member 20 is supported by the engagement pin 30 at a position protruding from the fixed member 10 (case member 16).

図１２の（ｂ）、図１５の（ａ）および図１６に示す如く、「突出姿勢」から移動部材２０に外力を作用させ、バネ４０の付勢力に抗して移動部材２０を固定部材１０（ケース部材１６）に対して没入方向（後方）に押し込んだとき、係合ピン３０の他端部（前端部）は第一カム溝７１の底面に当接しつつ第一カム溝７１に沿って移動し、第一落下段差７１ａを落下する。その結果、係合ピン３０の他端部（前端部）は第一中間位置（Ｂ１）に到達し、プッシュラッチ１は「突出姿勢」から「第一押込姿勢」に移行する。 As shown in FIGS. 12B, 15A, and 16, an external force is applied to the moving member 20 from the “protruding posture”, and the moving member 20 is fixed against the urging force of the spring 40. The other end portion (front end portion) of the engagement pin 30 is in contact with the bottom surface of the first cam groove 71 along the first cam groove 71 when pushed into the case member 16 in the immersion direction (rearward). Move and drop the first drop step 71a. As a result, the other end portion (front end portion) of the engagement pin 30 reaches the first intermediate position (B1), and the push latch 1 shifts from the “protruding posture” to the “first pushing posture”.

図１３の（ａ）、図１５の（ｂ）および図１６に示す如く、「第一押込姿勢」から移動部材２０に作用させている外力を解除したとき、移動部材２０はバネ４０の付勢力により固定部材１０（ケース部材１６）に対して突出方向（前方）に移動し、係合ピン３０の他端部（前端部）は第二カム溝７２の底面に当接しつつ第二カム溝７２に沿って移動し、第二落下段差７２ａを落下する。その結果、係合ピン３０の他端部は没入位置（Ｃ１）に到達し、プッシュラッチ１は「第一押込姿勢」から「没入姿勢」に移行し、移動部材２０は係合ピン３０により固定部材１０（ケース部材１６）に没入した位置で支持される。 As shown in FIGS. 13A, 15B, and 16, when the external force applied to the moving member 20 is released from the “first pushing posture”, the moving member 20 biases the spring 40. Accordingly, the second cam groove 72 is moved in the protruding direction (forward) with respect to the fixing member 10 (case member 16), and the other end portion (front end portion) of the engagement pin 30 is in contact with the bottom surface of the second cam groove 72. Along the second drop step 72a. As a result, the other end portion of the engaging pin 30 reaches the immersive position (C1), the push latch 1 shifts from the “first pushing posture” to the “immersive posture”, and the moving member 20 is fixed by the engaging pin 30. It is supported at a position immersed in the member 10 (case member 16).

図１３の（ｂ）、図１５の（ａ）および図１６に示す如く、「没入姿勢」から移動部材２０に外力を作用させ、バネ４０の付勢力に抗して移動部材２０を固定部材１０（ケース部材１６）に対して没入方向（後方）に押し込んだとき、係合ピン３０の他端部は第三カム溝７３の底面に当接しつつ第三カム溝７３に沿って移動し、第三落下段差７３ａを落下する。その結果、係合ピン３０の他端部は第二中間位置（Ｄ１）に到達し、プッシュラッチ１は「没入姿勢」から「第二押込姿勢」に移行する。 As shown in FIGS. 13B, 15A, and 16, an external force is applied to the moving member 20 from the “immersion posture”, and the moving member 20 is fixed against the biasing force of the spring 40. When pushed into the case member 16 in the immersion direction (backward), the other end of the engagement pin 30 moves along the third cam groove 73 while contacting the bottom surface of the third cam groove 73, The third drop step 73a is dropped. As a result, the other end of the engagement pin 30 reaches the second intermediate position (D1), and the push latch 1 shifts from the “immersion posture” to the “second push-in posture”.

図１２の（ａ）、図１４の（ａ）および図１６に示す如く、「第二押込姿勢」から移動部材２０に作用させている外力を解除したとき、移動部材２０はバネ４０の付勢力により固定部材１０（ケース部材１６）に対して突出方向（前方）に移動し、係合ピン３０の他端部は第四カム溝７４の底面に当接しつつ第四カム溝７４に沿って移動し、第四落下段差７４ａを落下する。その結果、係合ピン３０の他端部は合流位置（Ｅ１）を経て突出位置（Ａ１）に到達し、プッシュラッチ１は「第二押込姿勢」から「突出姿勢」に移行する（初期状態に戻る）。 As shown in FIGS. 12A, 14A, and 16, when the external force applied to the moving member 20 is released from the “second pushing posture”, the moving member 20 biases the spring 40. Accordingly, the other end of the engaging pin 30 moves along the fourth cam groove 74 while contacting the bottom surface of the fourth cam groove 74. Then, the fourth drop step 74a is dropped. As a result, the other end of the engagement pin 30 reaches the protruding position (A1) via the joining position (E1), and the push latch 1 shifts from the “second pushing position” to the “projecting position” (in the initial state). Return).

このように、移動部材２０を固定部材１０に対して没入方向に押し込んだ後、当該外力を解除することにより、プッシュラッチ１の姿勢を突出姿勢（固定部材１０に対して移動部材２０が突出した姿勢）と没入姿勢（固定部材１０に対して移動部材２０が没入した姿勢）との間で交互に切り替えることが可能である。
なお、ハートカム溝７０の底面にはそれぞれ第一落下段差７１ａ、第二落下段差７２ａ、第三落下段差７３ａ、第四落下段差７４ａが形成されている。そのため、移動部材２０を固定部材１０に対して没入方向に押し込む動作および当該外力を解除する動作を行ったとき、係合ピン３０の他端部（前端部）がハートカム溝７０の内部を逆行する（本実施形態の場合、ハートカム溝７０に沿って平面視で時計回りに移動する）ことはない。 As described above, after the moving member 20 is pushed into the fixed member 10 in the immersion direction, the external force is released to change the push latch 1 to the protruding position (the moving member 20 protrudes from the fixed member 10). Attitude) and an immersive attitude (an attitude in which the moving member 20 is immersed with respect to the fixed member 10) can be alternately switched.
A first drop step 71a, a second drop step 72a, a third drop step 73a, and a fourth drop step 74a are formed on the bottom surface of the heart cam groove 70, respectively. Therefore, when the operation of pushing the moving member 20 into the fixing member 10 and the operation of releasing the external force are performed, the other end portion (front end portion) of the engagement pin 30 moves backward in the heart cam groove 70. (In the case of this embodiment, it does not move clockwise in plan view along the heart cam groove 70).

以下では、図１６を用いてハートカム溝７０の底面の上下方向における高さについて説明する。なお、以下では便宜上、突出位置（Ａ１）」の上下方向における高さを基準（ゼロ）として設定するとともに、係合ピン３０の他端部（前端部）がハートカム溝７０の内部を逆行しないための基準となる段差の高さとして「基準段差高さＨ」を設定し、これらの値を用いて説明する。
ここで、「基準段差高さＨ」は係合ピン３０の他端部（前端部）の形状、バネ４０および係止リング５０の弾性力等に基づき、実験またはシミュレーションにより設定される。 Hereinafter, the height in the vertical direction of the bottom surface of the heart cam groove 70 will be described with reference to FIG. In the following, for the sake of convenience, the height in the vertical direction of the protruding position (A1) is set as a reference (zero), and the other end portion (front end portion) of the engagement pin 30 does not go backward in the heart cam groove 70. The “reference step height H” is set as the height of the step serving as a reference for the above, and explanation will be made using these values.
Here, the “reference step height H” is set by experiment or simulation based on the shape of the other end (front end) of the engagement pin 30, the elastic force of the spring 40 and the locking ring 50, and the like.

まずハートカム溝７０の底面のうち第一カム溝７１に対応する部分の高さについて説明する。図１６の（ｂ）に示す如く、ハートカム溝７０の底面の高さは、突出位置（Ａ１）から第一落下段差７１ａに至るまでに「２×Ｈ」だけ増加し、第一落下段差７１ａの直前となる部分の高さは「２×Ｈ」となる。そして、ハートカム溝７０の底面の高さは第一落下段差７１ａを境界として「１×Ｈ」だけ減少（落下）する。従って、第一中間位置（Ｂ１）におけるハートカム溝７０の底面の高さは「１×Ｈ（＝２×Ｈ−１×Ｈ）」となる。 First, the height of the portion corresponding to the first cam groove 71 in the bottom surface of the heart cam groove 70 will be described. As shown in FIG. 16B, the height of the bottom surface of the heart cam groove 70 increases by “2 × H” from the protruding position (A1) to the first drop step 71a, and the height of the first drop step 71a is increased. The height of the immediately preceding portion is “2 × H”. Then, the height of the bottom surface of the heart cam groove 70 decreases (falls) by “1 × H” with the first drop step 71a as a boundary. Accordingly, the height of the bottom surface of the heart cam groove 70 at the first intermediate position (B1) is “1 × H (= 2 × H−1 × H)”.

次にハートカム溝７０の底面のうち第二カム溝７２に対応する部分の高さについて説明する。図１６の（ｂ）に示す如く、ハートカム溝７０の底面の高さは、第一中間位置（Ｂ１）から第二落下段差７２ａに至るまでに「０．５×Ｈ」だけ増加し、第二落下段差７２ａの直前となる部分の高さは「１．５×Ｈ」となる。そして、ハートカム溝７０の底面の高さは第二落下段差７２ａを境界として「１×Ｈ」だけ減少（落下）する。従って、没入位置（Ｃ１）におけるハートカム溝７０の底面の高さは「０．５×Ｈ（＝１．５×Ｈ−１×Ｈ）」となる。 Next, the height of the portion corresponding to the second cam groove 72 in the bottom surface of the heart cam groove 70 will be described. As shown in FIG. 16B, the height of the bottom surface of the heart cam groove 70 increases by “0.5 × H” from the first intermediate position (B1) to the second drop step 72a. The height of the portion immediately before the drop step 72a is “1.5 × H”. Then, the height of the bottom surface of the heart cam groove 70 decreases (drops) by “1 × H” with the second drop step 72 a as a boundary. Accordingly, the height of the bottom surface of the heart cam groove 70 at the immersion position (C1) is “0.5 × H (= 1.5 × H−1 × H)”.

続いてハートカム溝７０の底面のうち第三カム溝７３に対応する部分の高さについて説明する。図１６の（ｂ）に示す如く、ハートカム溝７０の底面の高さは、没入位置（Ｃ１）から第三落下段差７３ａに至るまでに「０．５×Ｈ」だけ増加し、第三落下段差７３ａの直前となる部分の高さは「１×Ｈ」となる。そして、ハートカム溝７０の底面の高さは第三落下段差７３ａを境界として「１×Ｈ」だけ減少（落下）する。従って、第二中間位置（Ｄ１）におけるハートカム溝７０の底面の高さは「ゼロ（＝１×Ｈ−１×Ｈ）」となる。 Next, the height of the portion corresponding to the third cam groove 73 in the bottom surface of the heart cam groove 70 will be described. As shown in FIG. 16B, the height of the bottom surface of the heart cam groove 70 increases by “0.5 × H” from the immersion position (C1) to the third drop step 73a. The height of the portion immediately before 73a is “1 × H”. Then, the height of the bottom surface of the heart cam groove 70 decreases (falls) by “1 × H” with the third drop step 73a as a boundary. Therefore, the height of the bottom surface of the heart cam groove 70 at the second intermediate position (D1) is “zero (= 1 × H−1 × H)”.

続いてハートカム溝７０の底面のうち第四カム溝７４に対応する部分の高さについて説明する。図１６の（ｂ）に示す如く、ハートカム溝７０の底面の高さは、第二中間位置（Ｄ１）から第四落下段差７４ａに至るまでに「１×Ｈ」だけ増加し、第四落下段差７４ａの直前となる部分の高さは「１×Ｈ」となる。そして、ハートカム溝７０の底面の高さは第四落下段差７４ａを境界として「１×Ｈ」だけ減少（落下）する。従って、合流位置（Ｅ１）および突出位置（Ａ１）におけるハートカム溝７０の底面の高さは「ゼロ（＝１×Ｈ−１×Ｈ）」となる。 Next, the height of the portion corresponding to the fourth cam groove 74 in the bottom surface of the heart cam groove 70 will be described. As shown in FIG. 16B, the height of the bottom surface of the heart cam groove 70 increases by “1 × H” from the second intermediate position (D1) to the fourth drop step 74a. The height of the portion immediately before 74a is “1 × H”. Then, the height of the bottom surface of the heart cam groove 70 decreases (falls) by “1 × H” with the fourth drop step 74a as a boundary. Accordingly, the height of the bottom surface of the heart cam groove 70 at the joining position (E1) and the protruding position (A1) is “zero (= 1 × H−1 × H)”.

このように、ハートカム溝７０の底面の高低差は第一落下段差７１ａの直前となる部分と第二中間位置（Ｄ１）との間で最大となり、その大きさは「２×Ｈ」である。 Thus, the height difference of the bottom surface of the heart cam groove 70 is the maximum between the portion immediately before the first drop step 71a and the second intermediate position (D1), and the size thereof is “2 × H”.

一方、図１７に示す如く、従来のプッシュラッチの場合、第一落下段差１７１ａ、第二落下段差１７２ａ、第三落下段差１７３ａおよび第四落下段差１７４ａにおけるハートカム溝７０の底面の高さの減少量はいずれも「１×Ｈ」であり、ハートカム溝の底面のうち第一落下段差１７１から第二落下段差１７２ａまでの部分および第二落下段差１７２ａから第三落下段差１７３ａまでの部分はハートカム溝の底面の高さが変化しない。
従って、従来のプッシュラッチにおけるハートカム溝の底面の高低差は第一落下段差１７１ａの直前となる部分と第二中間位置（Ｄ２）との間で最大となり、その大きさは「３×Ｈ」である。 On the other hand, as shown in FIG. 17, in the case of the conventional push latch, the amount of decrease in the height of the bottom surface of the heart cam groove 70 at the first drop step 171a, the second drop step 172a, the third drop step 173a, and the fourth drop step 174a. Are “1 × H”, and the portion from the first drop step 171 to the second drop step 172a and the portion from the second drop step 172a to the third drop step 173a on the bottom surface of the heart cam groove are the heart cam groove. The height of the bottom does not change.
Therefore, the height difference of the bottom surface of the heart cam groove in the conventional push latch is the maximum between the portion immediately before the first drop step 171a and the second intermediate position (D2), and the size is “3 × H”. is there.

このように、本実施形態のプッシュラッチ１は、第二カム溝７２の底面のうち第一中間位置（Ｂ１）から第二落下段差７２ａに至るまでの部分が第一中間位置（Ｂ１）から第二落下段差７２ａに向かう上り坂であり、かつ、第三カム溝７３の底面のうち没入位置（Ｃ１）から第三落下段差７３ａに至るまでの部分が没入位置（Ｃ１）から第三落下段差７３ａに向かう上り坂であるため、従来のプッシュラッチ（図１７参照）に比べてハートカム溝７０の底面の高低差を小さくし、移動部材２０（ハートカム部２２）を上下方向（係合ピン３０が付勢される方向）において薄型化することが可能であり、ひいてはプッシュラッチの小型化に寄与する。 Thus, in the push latch 1 of the present embodiment, the portion from the first intermediate position (B1) to the second drop step 72a in the bottom surface of the second cam groove 72 is from the first intermediate position (B1). The part from the immersing position (C1) to the third falling step 73a on the bottom surface of the third cam groove 73 is the uphill toward the second dropping step 72a and the third falling step 73a from the immersing position (C1). Therefore, the height difference of the bottom surface of the heart cam groove 70 is made smaller than that of the conventional push latch (see FIG. 17), and the moving member 20 (heart cam portion 22) is moved in the vertical direction (with the engagement pin 30 attached). The thickness of the push latch can be reduced, which contributes to the downsizing of the push latch.

なお、本実施形態のプッシュラッチ１におけるハートカム溝７０の底面の高低差は「２×Ｈ」であるが、本発明はこれに限定されない。
すなわち、本発明に係るプッシュラッチにおけるハートカム溝の底面の高低差は、理論上は「１×Ｈ」まで小さくすることが可能である（図１６の（ｂ）中の太い点線参照）。 Although the height difference of the bottom surface of the heart cam groove 70 in the push latch 1 of the present embodiment is “2 × H”, the present invention is not limited to this.
That is, the height difference of the bottom surface of the heart cam groove in the push latch according to the present invention can theoretically be reduced to “1 × H” (see the thick dotted line in FIG. 16B).

本実施形態における係止部（胴体部２３、磁石部材２５およびヨーク部材２６・２７を合わせたもの）は磁力により第二対象物（例えば、家具の扉）を着脱可能に係止するが、本発明に係る係止部はこれに限定されず、他の方法により第二対象物を着脱可能に係止しても良い。本発明に係る係止部の他の実施形態としては、例えば、移動部材が固定部材に対して突出したときに開くとともに移動部材が固定部材に対して没入したときに閉じる一対の爪を有し、当該一対の爪が閉じたときに第二対象物に設けられた突起を把持することにより第二対象物を着脱可能に係止するもの、が挙げられる。 The locking part (the body part 23, the magnet member 25 and the yoke members 26 and 27 combined) in this embodiment locks the second object (for example, a furniture door) detachably by magnetic force. The locking part according to the invention is not limited to this, and the second object may be detachably locked by other methods. Other embodiments of the locking portion according to the present invention include, for example, a pair of claws that are opened when the moving member protrudes from the fixed member and are closed when the moving member is immersed in the fixed member. , And the like that detachably lock the second object by gripping a protrusion provided on the second object when the pair of claws are closed.

１プッシュラッチ、１０固定部材、１１ベース部材、１６ケース部材、２０移動部材、２１移動本体、２２ハートカム部、２３胴体部、２５磁石部材、２６・２７ヨーク部材、３０係合ピン（係合部材）、４０バネ（付勢部材）、５０係止リング（副付勢部材）、７０ハートカム溝、７１第一カム溝、７１ａ第一落下段差、７２第二カム溝、７２ａ第二落下段差、７３第三カム溝、７３ａ第三落下段差、７４第四カム溝、７４ａ第四落下段差、Ａ１突出位置、Ｂ１第一中間位置、Ｃ１没入位置、Ｄ１第二中間位置、Ｅ１合流位置 DESCRIPTION OF SYMBOLS 1 Push latch, 10 fixing member, 11 base member, 16 case member, 20 moving member, 21 moving main body, 22 heart cam part, 23 body part, 25 magnet member, 26/27 yoke member, 30 engaging pin (engaging member) ), 40 Spring (biasing member), 50 Locking ring (sub biasing member), 70 Heart cam groove, 71 First cam groove, 71a First drop step, 72 Second cam groove, 72a Second drop step, 73 Third cam groove, 73a Third drop step, 74 Fourth cam groove, 74a Fourth drop step, A1 protruding position, B1 first intermediate position, C1 immersion position, D1 second intermediate position, E1 merge position

Claims

第一対象物に固定される固定部材と、
突出位置から第一落下段差を経て第一中間位置に至る第一カム溝、前記第一中間位置から第二落下段差を経て没入位置に至る第二カム溝、前記没入位置から第三落下段差を経て第二中間位置に至る第三カム溝ならびに前記第二中間位置から第四落下段差を経て前記突出位置に至る第四カム溝を有するハートカム溝が形成されるハートカム部、および前記ハートカム部に連なるとともに第二対象物を着脱可能に係止する係止部、を備え、前記係止部が前記固定部材から突出する突出方向および前記係止部が前記固定部材に没入する没入方向に移動可能に前記固定部材に支持される移動部材と、
一端部が前記固定部材に固定され、他端部が前記ハートカム溝の底面に当接しつつ前記ハートカム溝に係合し、当該他端部が前記突出位置において前記ハートカム溝に係合することにより前記移動部材を前記固定部材から突出した位置で支持し、当該他端部が前記没入位置において前記ハートカム溝に係合することにより前記移動部材を前記固定部材に没入した位置で支持する係合部材と、
前記移動部材を前記突出方向に付勢する付勢部材と、
を具備し、
前記第二カム溝の底面のうち第一中間位置から前記第二落下段差に至るまでの部分は第一中間位置から前記第二落下段差に向かう上り坂であり、
前記第三カム溝の底面のうち前記没入位置から前記第三落下段差に至るまでの部分は前記没入位置から前記第三落下段差に向かう上り坂であり、
前記第一カム溝における前記突出位置から前記第一落下段差の直前までの底面高さの高低差である第一高低差は、前記第二カム溝における前記第一中間位置から前記第二落下段差の直前までの底面高さの高低差である第二高低差、及び、前記第三カム溝における前記没入位置から前記第三落下段差の直前までの底面高さの高低差である第三高低差、の何れよりも大きく形成される、
プッシュラッチ。 A fixing member fixed to the first object;
A first cam groove extending from the protruding position to the first intermediate position through the first drop step, a second cam groove extending from the first intermediate position to the immersive position via the second drop step, and a third drop step from the immersive position. A heart cam portion having a third cam groove extending to the second intermediate position and a fourth cam groove extending from the second intermediate position to the protruding position through a fourth drop step, and connected to the heart cam portion. And a locking part that detachably locks the second object, the locking part being movable in a protruding direction in which the locking part protrudes from the fixing member, and an immersion direction in which the locking part is immersed in the fixing member A moving member supported by the fixed member;
One end is fixed to the fixing member, the other end engages with the heart cam groove while contacting the bottom surface of the heart cam groove, and the other end engages with the heart cam groove at the protruding position. An engaging member that supports the moving member at a position protruding from the fixed member, and supports the moving member at a position immersed in the fixed member by engaging the other end of the moving member with the heart cam groove at the retracted position; ,
A biasing member that biases the moving member in the protruding direction;
Comprising
Of the bottom surface of the second cam groove, the portion from the first intermediate position to the second drop step is an uphill from the first intermediate position toward the second drop step,
Portion from said retracted position to said third drop step of the bottom surface of the third cam groove Ri uphill der toward the third falling step from the retracted position,
The first height difference, which is the height difference of the bottom surface height from the protruding position in the first cam groove to immediately before the first drop step, is the second drop step from the first intermediate position in the second cam groove. A second height difference that is the height difference of the bottom surface until immediately before the third height difference, and a third height difference that is the height difference of the bottom surface from the immersion position to immediately before the third drop step in the third cam groove. Formed larger than any of the above,
Push latch.

前記第一カム溝における前記第一落下段差の直前の底面高さは、前記第二カム溝における前記第二落下段差の直前の底面高さよりも大きく、
前記第二カム溝における前記第二落下段差の直前の底面高さは、前記第三カム溝における前記第三落下段差の直前の底面高さよりも大きい、
請求項１に記載のプッシュラッチ。 The bottom surface height immediately before the first drop step in the first cam groove is greater than the bottom surface height immediately before the second drop step in the second cam groove,
The bottom surface height immediately before the second drop step in the second cam groove is greater than the bottom surface height immediately before the third drop step in the third cam groove,
The push latch according to claim 1.

前記係合部材の他端部が前記ハートカム溝の底面に当接する方向に前記係合部材を付勢する副付勢部材を具備する、
請求項１又は請求項２に記載のプッシュラッチ。 A secondary biasing member that biases the engagement member in a direction in which the other end of the engagement member contacts the bottom surface of the heart cam groove;
The push latch according to claim 1 or claim 2 .