JP2013019223A

JP2013019223A - Latch device

Info

Publication number: JP2013019223A
Application number: JP2011155005A
Authority: JP
Inventors: Tomoji Izume; 友治井爪
Original assignee: Nifco Inc
Current assignee: Nifco Inc
Priority date: 2011-07-13
Filing date: 2011-07-13
Publication date: 2013-01-31
Anticipated expiration: 2031-07-13
Also published as: WO2013008793A1; CN103797203A; JP5789438B2; CN103797203B

Abstract

PROBLEM TO BE SOLVED: To provide a latch device for enabling a more reliable and accurate change in the magnitude of a forcibly removing load depending on use applications, in particular, than a conventional countermeasure product.SOLUTION: The latch device includes a sliding body 2 with a cam groove arranged in a case 1, a spring member 4 for energizing the sliding body to be protruded from the case 1, an engaging body 3 pivoted on the sliding body and changeable over between a locking state of protruding a front end side claw 32 from the inside of the sliding body to lock an engaged member 7 and an unlocking state of retracting it into the sliding body, and a tracing member 5. When moved against the energizing force of the spring member, the sliding body is locked to an after-moved position via the cam groove and the tracing member to change over the engaging body from the unlocking state into the locking state. A leaf spring 6 is arranged in the case for serving as a resistance to the engaging body to be rocked to accumulate the energizing force when the engaging body in the locking state of locking the engaged member 7 is rocked in the unlocking direction by force to pull the engaged member off, and for changing over the engaging body into the locking state again with the accumulated energizing force when the engaged member is pulled off.

Description

本発明は、第１部材（例えば、本体や基体）に対し第２部材（例えば、蓋や扉などの可動体）を着脱可能に係止するようなときに用いられるラッチ装置のうち、特に最初の押し操作により第２部材側のストライカーを係止し、次の押し操作により係止解除するプッシュ式（これはプッシュ・プッシュ式、プッシュロック・プッシュオープン式、オルタネート式などと称されることもある。以下、同じ）に好適なラッチ装置に関する。 Of the latch devices used when the second member (for example, a movable body such as a lid or a door) is detachably locked to the first member (for example, a main body or a base body), Push type that locks the striker on the second member side by pushing operation and unlocks it by the next pushing operation (this is also called push-push type, push-lock push-open type, alternate type, etc. The following is the same).

図１０は特許文献１に開示のプッシュ式のラッチ装置を示している。この構造では、ケース２と、ケース内に配置されてばね部材４５の付勢力に抗して押圧移動される突当部３２及びカム溝５などを有した摺動体３０と、先端側爪部３９及び後端側凸部３８ｃを有して摺動体３０に枢支された係合体３７と、トレース部材６とを備えている。ここで、係合体３７は、摺動体３０の軸穴に対し両側の軸部３７ａを嵌合枢支され、摺動体３０の移動により、爪部３９を突当部３２上に突出して被係脱部材であるストライカー６２を係止する同（ｂ）の係止状態と、爪部３９を突当部３２上から退行する同（ａ）の係止解除状態とに切り換えられる。係止解除状態では、摺動体３０がばね部材４５の付勢力でケース入口側に移動され、係合体３７がケース２内に設けられた張出部２８に凸部３８ｃを乗り上げることでその状態を保つ。係止状態では、摺動体３０がストライカー６２の押し力でばね部材４５の付勢力に抗して奥側に移動され、該移動後の位置にカム溝５及びトレース部材６の係合を介し係止され、係合体３７が凸部３８ｃを張出部２８から低くなった部分に移動し、かつ傾動して爪部３９を摺動体側の開口３３内から突出する。 FIG. 10 shows a push-type latch device disclosed in Patent Document 1. In this structure, the case 2, the sliding body 30 having the abutting portion 32, the cam groove 5, and the like that are disposed in the case and are pressed and moved against the urging force of the spring member 45, and the front end side claw portion 39. And an engaging body 37 pivotally supported by the sliding body 30 with the rear end side convex portion 38 c and the trace member 6. Here, the engaging body 37 is fitted and supported by the shaft portions 37a on both sides of the shaft hole of the sliding body 30, and by the movement of the sliding body 30, the claw portion 39 protrudes on the abutting portion 32 and is disengaged. The locking state is switched between (b) where the striker 62 which is a member is locked and (a) where the claw portion 39 is retracted from the abutting portion 32. In the unlocked state, the sliding body 30 is moved to the case entrance side by the urging force of the spring member 45, and the engaging body 37 rides the protruding portion 38 c on the overhanging portion 28 provided in the case 2 to change the state. keep. In the locked state, the sliding body 30 is moved to the back side against the urging force of the spring member 45 by the pushing force of the striker 62, and the position after the movement is engaged through the engagement of the cam groove 5 and the trace member 6. The engaging body 37 is moved to a portion where the convex portion 38c is lowered from the protruding portion 28, and is tilted to project the claw portion 39 from the opening 33 on the sliding body side.

換言すると、以上のラッチ装置は、摺動体３０に対するストライカー６２の押し力により係合体３７を係止解除状態から係止状態に切り換え、摺動体３０に対するストライカー６２の次の押し力により係止状態から係止解除状態に切り換える。その際、ばね部材４５は、上側が係合体３７の下中間に設けられた突片部に係止されており、摺動体３０が奥へ押圧移動される過程で付勢力を蓄積しながら、係合体３７を軸部３７ａを支点として同図の逆時計回りへ回転し係止解除状態から係止方向へ切換可能とする。 In other words, the above latch device switches the engagement body 37 from the unlocked state to the locked state by the pushing force of the striker 62 against the sliding body 30, and from the locked state by the next pushing force of the striker 62 against the sliding body 30. Switch to the unlocked state. At that time, the upper side of the spring member 45 is locked to a projecting piece provided in the lower middle of the engaging body 37, and the spring member 45 is engaged while accumulating urging force in the process of the sliding body 30 being pushed and moved to the back. The united body 37 is rotated counterclockwise in the same figure with the shaft portion 37a as a fulcrum, and can be switched from the unlocked state to the locking direction.

使用例としては、本体側にラッチ装置を取り付け、扉側にストライカー６２を設けた場合だと、図１０（ｂ）が扉を本体に係止（ロック）した状態となり、扉側のストライカー６２が本体側のラッチ装置を構成している係合体３７により係止される。この係止は、扉が再び本体側へ押されると、トレース部材６がカム溝５の係止溝から外れて同（ａ）のごとく係止解除される。このような構造は特許文献２や３のラッチ装置も同じ。 As an example of use, when a latch device is attached to the main body side and a striker 62 is provided on the door side, FIG. 10B shows a state where the door is locked (locked) to the main body. It is locked by an engaging body 37 constituting a latch device on the main body side. When the door is pushed again toward the main body, the locking is released from the locking groove of the cam groove 5 and the locking is released as shown in FIG. Such a structure is the same in the latch devices of Patent Documents 2 and 3.

特許第４５４５７１１号公報Japanese Patent No. 4545711 特開２００８−２０８６８４号公報JP 2008-208684 A 特開２０１０−１０６４７８号公報JP 2010-106478 A

上記したラッチ装置では、例えば、扉を閉じた係止状態において、扉を本体から離間する方向の外力が作用すると、係合体３７がストライカー６２の引き抜き方向の応力を受けて摺動体側開口３３を区画している枠部の内面に圧接される。この構造では、そのときに生じる摩擦力により係合体３７とストライカー６２との間に所定の係止力、つまり係止状態を維持しようとする力（無理抜き荷重）が得られるようにし、扉が不用意に開くという事態を防止している。 In the above-described latch device, for example, when an external force acting in a direction in which the door is separated from the main body acts in a locked state where the door is closed, the engaging body 37 receives the stress in the pulling direction of the striker 62 and opens the sliding body side opening 33. It is in pressure contact with the inner surface of the partitioning frame. In this structure, a predetermined locking force, that is, a force for maintaining the locked state (unreasonable load) is obtained between the engaging body 37 and the striker 62 by the frictional force generated at that time, and the door is The situation of inadvertent opening is prevented.

ところが、そのような無理抜き荷重は、係合体側爪部３９と開口３３とが接する面同士の表面粗さやヒケ度合いなどの外的要因に左右されて一定に維持し難かった。また、従来構造では、無理抜き荷重を高くするため係合体側爪部３９の形状にアンダーカット段差やを設けると、爪部３９が開口３３側に引っかかるなど通常時の正常な作動が損なわれ易くなる。なお、扉に対し無理抜き荷重より大きな外力が作用した場合は、係合体３７が爪部３９を突当部３２上から退行するよう回転、つまり係止状態から係止解除方向に切り換えられるが、カム溝やトレース部材の破壊要因となる。 However, it has been difficult to maintain such a force-free load constant depending on external factors such as the surface roughness and the degree of sinking between the surfaces where the engaging-body-side claw portions 39 and the openings 33 are in contact with each other. Further, in the conventional structure, if an undercut step or the like is provided in the shape of the engaging body side claw portion 39 in order to increase the force of unloading, normal operation such as the claw portion 39 being caught on the opening 33 side is likely to be impaired. Become. When an external force larger than the force with which the door is forcibly applied is applied to the door, the engaging body 37 is rotated so that the claw portion 39 retracts from the abutting portion 32, that is, the locked state is switched to the unlocking direction. It becomes a cause of destruction of cam grooves and trace members.

以上のような対策として、本出願人は特許文献２や３に開示されている構成などを開発してきた。本発明の目的は、それらの対策に比べ、特に無理抜き荷重を高くしたり用途に応じた大きさに確実かつ的確に変更可能にして、設計自由度を向上し用途拡大を図ることにある。 As countermeasures as described above, the present applicant has developed the configurations disclosed in Patent Documents 2 and 3. The object of the present invention is to increase the degree of freedom of design and to expand applications by making it possible to increase the unreasonable load or to change the size according to the application surely and accurately as compared with those countermeasures.

上記目的を達成するため本発明は、図面を参照して特定すると、ケース１と、前記ケースに配置されたカム溝付きの摺動体２と、前記摺動体を前記ケースから突出する方向へ付勢するばね材４と、前記摺動体に枢支され先端側爪３２を摺動体内から突出して被係脱部材７を係止する係止状態と摺動体内に退避する係止解除状態とに切換可能な係合体３と、前記カム溝を動くトレース部材５とを備え、前記摺動体２が前記ばね材４の付勢力に抗し移動されると移動後の位置に前記カム溝及びピン部材を介し係止され、かつ前記係合体３が係止解除状態から係止状態に切り換えられるラッチ装置において、前記ケース１内に配置されて、前記係合体３が前記被係脱部材７を係止している係止状態で、前記被係脱部材の引き抜き方向への引き力により係止解除方向へ揺動されるときに該係合体の揺動抵抗となって付勢力を蓄えると共に、前記被係脱部材７を引き抜くと前記蓄えた付勢力により前記係合体を再び係止状態に切り換える無理抜き荷重増大用の板ばねを６（６Ａ，６Ｂ）有していることを特徴としている。 To achieve the above object, the present invention, when specified with reference to the drawings, urges the case 1, the sliding body 2 with a cam groove disposed in the case, and the sliding body in a direction protruding from the case. The spring member 4 to be switched, and a locking state in which the front end claw 32 is pivotally supported by the sliding body and protrudes from the sliding body to lock the engaged / disengaged member 7 and is switched to an unlocking state in which the sliding body is retracted. And a trace member 5 that moves in the cam groove. When the sliding body 2 is moved against the urging force of the spring material 4, the cam groove and the pin member are moved to the moved position. And the engagement body 3 is disposed in the case 1 and the engagement body 3 locks the engaged / disengaged member 7 in the latch device in which the engagement body 3 is switched from the unlocked state to the locked state. In the locked state, the pulling force of the engaged / disengaged member in the pulling direction When it is swung in the unlocking direction, it becomes a rocking resistance of the engaging body and accumulates an urging force. When the engaged member 7 is pulled out, the engaging body is again locked by the accumulated urging force. It is characterized by having 6 (6A, 6B) leaf springs for increasing the unreasonable load.

以上の本発明は、請求項２〜６のように具体化されることがより好ましい。すなわち、
(ア)前記板ばね６は前記ケース１に取り付けられている構成である（請求項２）。
(イ)前記板ばね（６Ａ又は６Ｂ）は前記摺動体２又は前記係合体３側に取り付けられている構成である（請求項３）。 The present invention as described above is more preferably embodied as in the second to sixth aspects. That is,
(A) The leaf spring 6 is attached to the case 1 (Claim 2).
(A) The leaf spring (6A or 6B) is attached to the sliding body 2 or the engaging body 3 side (Claim 3).

(ウ)前記板ばね６（６Ａ，６Ｂ）は両側に立設された取付用係止部６ｂや６ｅ（６ｈや６ｋ）を有している構成である（請求項４）。
(エ)前記板ばね６（６Ａ，６Ｂ）は斜めに立ち上がって前記係合体に接触する当接部６ｃを有している構成である（請求項５）。
(オ)前記板ばね６は前記摺動体２の移動範囲を規制するガイド溝６ｆを有している構成である（請求項６）。 (C) The leaf spring 6 (6A, 6B) has a mounting locking portion 6b or 6e (6h or 6k) provided upright on both sides (Claim 4).
(D) The leaf spring 6 (6A, 6B) has a contact portion 6c that rises obliquely and contacts the engaging body (Claim 5).
(E) The leaf spring 6 has a guide groove 6f for restricting the moving range of the sliding body 2 (Claim 6).

請求項１の発明では、係合体が被係脱部材を係止した（トレース部材がカム溝に係止された）係止状態で、図７に示されるごとく被係脱部材を介して無理抜き方向に一定値以上の負荷を受けると、係合体が係止解除方向に回転しようとし、その際に板ばねの弾性に抗し、つまり板ばねに弾性力ないは付勢力を蓄えつつ回転して被係脱部材を係止解除する。係合体は、その係止解除状態から板ばねに蓄えられた付勢力により再び係止状態に切り換えられる。 According to the first aspect of the present invention, when the engaging body is engaged with the engaged / disengaged member (the trace member is engaged with the cam groove), it is forcibly removed through the engaged / disengaged member as shown in FIG. When a load of a certain value or more is applied in the direction, the engagement body tries to rotate in the unlocking direction, and at that time, it resists the elasticity of the leaf spring, that is, the leaf spring rotates while accumulating an urging force. Unlock the engaged / disengaged member. The engaging body is switched from the unlocked state to the locked state again by the urging force stored in the leaf spring.

換言すると、本発明において、ケース内の板ばねは係合体が係止解除方向に回転する毎に撓んで付勢力を蓄積し、係止解除時は蓄積された付勢力により係合体を再び係止状態に切り換える。構造特徴は、板ばねの撓み力を利用しているため、簡易であり、かつ高強度を得られる。また、無理抜きを伴わない通常の作動は、図５及び図６から推察されるごとく板ばねが撓まないため、板ばねがない構造と同様に良好に維持される。しかも、無理抜き荷重ないしは強度が板ばねの板金強度に依存するため、無理抜き荷重を高くしたり、多数の強度バリエーションを展開可能であり、その結果、設計自由度を向上し用途拡大に寄与できる。 In other words, in the present invention, the leaf spring in the case bends each time the engaging body rotates in the unlocking direction and accumulates the urging force, and when the locking is released, the engaging body is locked again by the accumulated urging force. Switch to state. The structural feature is simple and high strength can be obtained because the bending force of the leaf spring is used. Further, the normal operation without unreasonable operation is maintained as well as the structure without the leaf spring because the leaf spring does not bend as inferred from FIGS. In addition, the force of unloading or the strength depends on the strength of the leaf spring, so the force of unloading can be increased or a number of strength variations can be developed. As a result, the degree of freedom in design can be improved and the application can be expanded. .

請求項２の発明では、板ばねをケース内面に装着するため、例えば板ばねの全寸を長く設定して取付構造の選択肢を広げたり、請求項６のガイド溝なども付設し易くできる。 In the invention of claim 2, since the leaf spring is mounted on the inner surface of the case, for example, the entire length of the leaf spring can be set long to widen the options of the mounting structure, and the guide groove of claim 6 can be easily attached.

請求項３の発明では、板ばねがケース以外の摺動体などに装着すると、請求項２に比べ、取付作業や組立手順の改善を図ったり、軽量化やコスト低減を図り易くなる。 In the invention of claim 3, when the leaf spring is mounted on a sliding body other than the case, it is easier to improve the mounting operation and the assembling procedure, to reduce the weight and to reduce the cost, as compared to claim 2.

請求項４の発明では、板ばねが取付用係止部を利用してケースや摺動体などに簡単に装着可能となり、それによって良好な組立作業性を維持できる。 In the invention of claim 4, the leaf spring can be easily attached to the case or the sliding body by using the mounting locking portion, thereby maintaining good assembly workability.

請求項５の発明では、板ばねが係合体に接触する傾斜した当接部を有しているため、例えば当接部の幅や傾きなどの形状を変更することによっても用途に応じた大きさの無理抜き荷重ないしは強度を容易に設定可能となる。 In the invention of claim 5, since the leaf spring has an inclined contact portion that comes into contact with the engaging body, for example, by changing the shape of the contact portion such as the width and the inclination, the size according to the application can be obtained. It is possible to easily set the unreasonable load or strength.

請求項６の発明では、摺動体の移動範囲を規制するガイド溝を板ばねに形成すると、ガイド溝をケースに貫通形成していた従来構造に比べ、ケースが簡易化され、かつ外観特性も改善できる。 In the invention of claim 6, when the guide groove for regulating the moving range of the sliding body is formed in the leaf spring, the case is simplified and the appearance characteristics are improved as compared with the conventional structure in which the guide groove is formed through the case. it can.

形態のラッチ装置及びストライカーの関係を示し、（ａ）はストライカーを係止解除した状態で前方より見た概略図、（ｂ）はストライカーを係止した状態で後方より見た概略図である。The relationship between the latch device of the form and the striker is shown, (a) is a schematic view seen from the front with the striker unlocked, and (b) is a schematic view seen from the rear with the striker locked. 上記ラッチ装置を分解した概略的な構成図である。It is the schematic block diagram which decomposed | disassembled the said latch apparatus. （ａ）は上記ラッチ装置の要部を拡大して示す概略斜視図である。(A) is a schematic perspective view which expands and shows the principal part of the said latch apparatus. 上記ラッチ装置の使用例を示し、（ａ）は図１（ａ）に対応した側面図、（ｂ）は図１（ｂ）に対応した側面図である。The usage example of the said latch apparatus is shown, (a) is a side view corresponding to Fig.1 (a), (b) is a side view corresponding to FIG.1 (b). 上記ラッチ装置を図４（ａ）に対応した状態で示し、（ａ）は模式縦断面図、（ｂ）はトレース部材とカム溝との模式関係図である。The latch device is shown in a state corresponding to FIG. 4A, where FIG. 5A is a schematic longitudinal sectional view, and FIG. 5B is a schematic diagram of a relationship between a trace member and a cam groove. 上記ラッチ装置を図４（ｂ）に対応した状態で示し、（ａ）は模式縦断面図、（ｂ）はトレース部材とカム溝との模式関係図である。The latch device is shown in a state corresponding to FIG. 4B, (a) is a schematic longitudinal sectional view, and (b) is a schematic relationship diagram between a trace member and a cam groove. （ａ）は上記ラッチ装置からストライカーを無理抜きした直前の状態を示す模式縦断面図、（ｂ）はトレース部材とカム溝との模式関係図である。(A) is a schematic longitudinal cross-sectional view which shows the state immediately before forcing a striker from the said latch apparatus, (b) is a schematic relationship figure of a trace member and a cam groove. （ａ）は前記無理抜き後にラッチ装置を初期態様に復帰させる際の操作を示し、（ｂ）はトレース部材とカム溝との模式関係図である。(A) shows operation at the time of returning the latch device to the initial mode after forcibly removing it, and (b) is a schematic diagram of the relationship between the trace member and the cam groove. 上記ラッチ装置の変形例を示し、（ａ）は変形例１の要部分解図、（ｂ）は変形例２の要部分解図である。The modification of the said latch apparatus is shown, (a) is a principal part exploded view of the modification 1, (b) is a principal part exploded view of the modification 2. FIG. （ａ），（ｂ）は特許文献１のラッチ装置を係止解除状態及び係止状態で示す説明図である。(A), (b) is explanatory drawing which shows the latch apparatus of patent document 1 in a latch release state and a latching state.

本発明の最良の形態について添付図面を参照しながら説明する。図１〜図３はラッチ装置の構造を示し、図４はラッチ装置の使用例を示し、図５〜図８はラッチ装置の作動を示し、図９は変形例１と２を示している。なお、図面では作図上の制約から細部を模式化したり簡略化ている。以下の説明では、装置構造、組立要領を明らかにした後、作動について詳述する。 The best mode of the present invention will be described with reference to the accompanying drawings. 1 to 3 show the structure of the latch device, FIG. 4 shows an example of use of the latch device, FIGS. 5 to 8 show the operation of the latch device, and FIG. 9 shows the first and second modifications. In the drawings, details are schematically illustrated or simplified due to restrictions on drawing. In the following description, the operation will be described in detail after clarifying the device structure and assembly procedure.

（装置構造）図１〜図４に開示のラッチ装置は、偏平容器状のケース１と、被係脱部材であるストライカー７と当接する突当部２２及びカム溝２７を有してケース１に対し進退可能に配置された摺動体２と、摺動体２に対し揺動可能に枢支されて、爪部３２を突当部２２の上に突出してストライカー７を係止可能にする係止状態及び突当部２２の上から退行する係止解除状態に切り換えられる係合体３と、摺動体２をケース１から突出する方向へ付勢しているばね部材４と、カム溝２７を旋回するトレース部材５と、ケース１内に配置された無理抜き加重増大用の板ばね６とを備えている。そして、このラッチ装置は、摺動体２がストライカー７で後方へ押圧されてばね部材４の付勢力に抗して移動されると、その移動後の位置にカム溝２７及びトレース部材５を介して係止され、かつ係合体３が係止解除状態から係止状態に切り換えられるプッシュ式からなる。 (Device Structure) The latch device disclosed in FIGS. 1 to 4 includes a case 1 having a flat container shape, a contact portion 22 that comes into contact with a striker 7 that is a member to be engaged and disengaged, and a cam groove 27. A sliding body 2 arranged to be able to advance and retreat, and a locking state that is pivotably supported with respect to the sliding body 2 and that allows the striker 7 to be locked by protruding the claw portion 32 onto the abutting portion 22. And the engaging body 3 that is switched to the unlocking state retreating from above the abutting portion 22, the spring member 4 that urges the sliding body 2 in the direction to protrude from the case 1, and the trace that turns the cam groove 27. A member 5 and a leaf spring 6 for increasing a forced load arranged in the case 1 are provided. When the sliding body 2 is pushed rearward by the striker 7 and moved against the urging force of the spring member 4, the latch device is moved to the position after the movement via the cam groove 27 and the trace member 5. It is a push type that is locked and the engaging body 3 is switched from the unlocked state to the locked state.

また、以上のラッチ装置は、例えば、図４に示した機器類の本体８側に取り付けられ、扉９に取り付けられたストライカー９を係脱する使用例だと、扉９が不図示の付勢手段の付勢力に抗して閉位置方向へ押されると、扉９をストライカー７を介して係止し、更に扉９を同方向へ押して押し力を解放すると、ストライカー７に対する係止を解除する。勿論、使用方法としては、ラッチ装置を扉等の可動体側に取り付けて、機器類の本体側に取り付けられる被係脱部材を係脱する構成でもよい。また、材質は、ケース１、摺動体２、係合体３は樹脂成形品であるが、樹脂以外でも差し支えない。 Further, the above-described latch device is attached to the main body 8 side of the equipment shown in FIG. 4, for example, and when the striker 9 attached to the door 9 is engaged and disengaged, the door 9 is energized (not shown). When pressed against the biasing force of the means in the closed position direction, the door 9 is locked via the striker 7, and when the door 9 is further pressed in the same direction to release the pressing force, the lock on the striker 7 is released. . Of course, as a method of use, the latch device may be attached to the movable body side such as a door, and the engaged / disengaged member attached to the main body side of the equipment may be engaged / disengaged. Further, the case 1, the sliding body 2 and the engaging body 3 are resin molded products, but materials other than resin may be used.

ここで、ケース１は、図１〜図３と図５に示されるごとく内部が上下壁１０，１１と、両側壁１２と、後側の底壁１３とで区画形成された略筒形となっている。このうち、上壁１０の内面には、細部を省いたが、トレース部材５の揺動範囲を規制する不図示のガイド部や摺動体２の前後動を案内する左右略中間部のガイド溝１０ａなどが設けられている。下壁１１には、内面両側に突設されて係合体３を係止解除方向へ回転可能にする張出部１６と、後側に設けられてばね部材４を保持する支持軸４０を位置決めする不図示の位置決め部などが設けられている。両側壁１２には、後下側に突設されている孔１７ａ付きの取付部１７と、側壁内面に対向して設けられて前後方向に延びているガイド溝１４などが設けられている。 Here, as shown in FIGS. 1 to 3 and FIG. 5, the case 1 has a substantially cylindrical shape in which the inside is defined by upper and lower walls 10, 11, both side walls 12, and a rear bottom wall 13. ing. Of these, although the details are omitted on the inner surface of the upper wall 10, a guide groove (not shown) that restricts the swing range of the trace member 5 and a guide groove 10 a at a substantially intermediate portion on the left and right that guides the back and forth movement of the sliding body 2. Etc. are provided. On the lower wall 11, a projecting portion 16 that protrudes on both sides of the inner surface and allows the engaging body 3 to rotate in the unlocking direction and a support shaft 40 that is provided on the rear side and holds the spring member 4 are positioned. A positioning part (not shown) is provided. The side walls 12 are provided with a mounting portion 17 with a hole 17a projecting on the rear lower side, a guide groove 14 provided facing the inner surface of the side wall and extending in the front-rear direction.

底壁１３は、トレース部材５を揺動可能に取り付ける保持部として構成されている。この保持部は、両側壁１２の内面に連結支持された状態に設けられた略凹状となっている。該凹状の対向面には、後述するトレース部材側取付部５ａの嵌合穴５ｅに嵌合する不図示の突起、取付部５ａの端面に設けられた凸部５ｄに嵌合する不図示の孔などが設けられている。 The bottom wall 13 is configured as a holding portion to which the trace member 5 is swingably attached. The holding portion has a substantially concave shape provided so as to be connected and supported on the inner surfaces of the side walls 12. On the concave opposing surface, a projection (not shown) that fits in a fitting hole 5e of a trace member side mounting portion 5a, which will be described later, and a hole (not shown) that fits a convex portion 5d provided on the end surface of the mounting portion 5a. Etc. are provided.

摺動体２は、図２及び図３のごとくケース１の出入口側に配置される略矩形容器状の本体２０と、本体２０の後方に突設されて本体２０より幅細になっている後延長部２５とからなる。本体２０の外面には、上記ガイド溝１０ａに嵌合する上面の突起２０ａや上記ガイド溝１４に嵌合する両側面の突起２０ｂと、下面側に設けられた矩形状の開口２１ａとが設けられている。本体の内部２４は、奥側端面の突当部２２と、途中から外上側に向かって広がるように傾斜した上面２１ｂと、開口２１ａ側より外下側に向かって広がるように傾斜した下面２１ｃと、対向している両側面２１ｄとで概略区画されていると共に、開口２１ａからも出入り可能となっている。 As shown in FIGS. 2 and 3, the sliding body 2 has a substantially rectangular container-like main body 20 arranged on the entrance / exit side of the case 1, and a rear extension that protrudes behind the main body 20 and is narrower than the main body 20. Part 25. On the outer surface of the main body 20, there are provided a protrusion 20a on the upper surface that fits into the guide groove 10a, a protrusion 20b on both sides that fits in the guide groove 14, and a rectangular opening 21a provided on the lower surface side. ing. The inner part 24 of the main body includes an abutting portion 22 on the back end face, an upper surface 21b inclined so as to spread from the middle toward the outer upper side, and a lower surface 21c inclined so as to spread from the opening 21a side toward the outer lower side. The two sides 21d are opposed to each other and can also enter and exit from the opening 21a.

後延長部２５は、ハート形カム溝２７を形成している上側部分と共にその上側部分と同方向に延びる下側の筒部２６で構成されている。上側のカム溝２７は、図５（ｂ）のごとく凸状カム島２８の周りに設けられて、後側から前側へ延びる誘導溝２７ａと、誘導溝２７ａの前側に位置して左右に別れている係止用誘導溝２７ｂ及び解除用誘導溝２７ｄと、誘導溝２７ｂ，２７ｄの間でかつ後側に位置した凹状係止溝２７ｃと、誘導溝２７ｄから後側へ延びる復帰溝２７ｅなどで構成されている。これに対し、筒部２６は、筒内が上記したばね部材４の上側を遊嵌可能な筒孔を形成しており、筒下側に突設されて上記ガイド溝１１ａと嵌合される突起２６ａ（図５（ａ）を参照）と、本体側にあって幅方向に貫通されて係合体３をシャフト３９を介し枢支する軸孔２９とを有している。 The rear extension 25 is composed of an upper portion forming a heart-shaped cam groove 27 and a lower cylindrical portion 26 extending in the same direction as the upper portion. The upper cam groove 27 is provided around the convex cam island 28 as shown in FIG. 5 (b), and is separated from the left and right by being located on the front side of the guide groove 27a and the guide groove 27a extending from the rear side to the front side. The guide groove 27b and the guide groove 27d for release, the concave lock groove 27c located between the guide grooves 27b and 27d and on the rear side, the return groove 27e extending rearward from the guide groove 27d, and the like. Has been. On the other hand, the cylindrical portion 26 forms a cylindrical hole in which the upper side of the above-described spring member 4 can be loosely fitted, and a projection that protrudes on the lower side of the cylinder and engages with the guide groove 11a. 26a (refer to FIG. 5A) and a shaft hole 29 which is provided on the main body side and penetrates in the width direction to pivotally support the engaging body 3 via the shaft 39.

係合体３は、図２及び図３のごとく前板部３０と、前板部３０から後方向へ突設した両側の後片部と３１，３１とからなる。前板部３０には、上側に突出した爪部３２と、爪部３２の基端から前板部３０の下側ないしは背面側に突設された突出部３３とが設けられている。爪部３２は、摺動体側開口２１ａから内部２４に自在に進入されたり退行される大きさである。各後片部３１には、軸孔３４が対向内面にそれぞれ貫通形成されている。 As shown in FIGS. 2 and 3, the engaging body 3 includes a front plate portion 30, rear piece portions 31, 31 on both sides projecting rearward from the front plate portion 30. The front plate portion 30 is provided with a claw portion 32 that protrudes upward, and a protrusion portion 33 that protrudes from the proximal end of the claw portion 32 to the lower side or the back side of the front plate portion 30. The nail | claw part 32 is a magnitude | size which is freely entered into the inside 24 from the sliding body side opening 21a, or is retracted. A shaft hole 34 is formed in each rear piece portion 31 so as to penetrate the opposing inner surface.

ばね部材４は、コイルスプリングが用いられており、後端側が支持軸４０を介してケース１の対応部に保持される。そして、ばね部材４は、摺動体２がケース１の奥へ押圧移動される過程で付勢力を増大し、該付勢力によって係合体３をシャフト３９を支点として係止方向へ回転可能にする。 A coil spring is used for the spring member 4, and the rear end side is held by the corresponding portion of the case 1 via the support shaft 40. The spring member 4 increases the urging force in the process in which the sliding body 2 is pressed and moved to the back of the case 1, and the urging force enables the engaging body 3 to rotate in the locking direction with the shaft 39 as a fulcrum.

トレース部材５は、図２のごとく概略逆Ｌ形からなり、垂直状の取付部５ａと、取付部５ａの上端に連結した水平状の腕部５ｂ、腕部５ｂの先端下面に突出されたピン部５ｃとからなる。このうち、取付部５ａは、下端の凸部５ｄと、両側の凹部５ｅと、下内周側の凸状の受け部５ｆとを形成しており、上記したケース後壁１３の凹状保持部に対し、凸部５ｄが保持部側の不図示の穴に嵌合され、保持部側の不図示の突片部が各凹部５ｅに嵌合した状態で左右に揺動可能に保持される。ピン部５ｃは、断面が小さな矩形状をなし、腕部５ｂから直角に下設されている。以上のトレース部材５は、受け部５ｆに上記したばね部材４を支持ている支持軸４０が位置決め係止されることで常に後方向に付勢され、それによりがたつきが吸収されたりセンタリング可能となっている。 The trace member 5 has a substantially inverted L shape as shown in FIG. 2, and includes a vertical mounting portion 5a, a horizontal arm portion 5b connected to the upper end of the mounting portion 5a, and a pin protruding from the lower end of the tip of the arm portion 5b. Part 5c. Of these, the attachment portion 5a forms a convex portion 5d at the lower end, concave portions 5e on both sides, and a convex receiving portion 5f on the lower inner peripheral side, and is formed on the concave holding portion of the case rear wall 13 described above. On the other hand, the convex portion 5d is fitted into a hole (not shown) on the holding portion side, and a protruding piece portion (not shown) on the holding portion side is held so as to be able to swing left and right in a state of being fitted to each concave portion 5e. The pin portion 5c has a rectangular shape with a small cross section, and is provided at a right angle from the arm portion 5b. The above trace member 5 is always urged rearward by positioning and locking the support shaft 40 supporting the spring member 4 to the receiving portion 5f, so that rattling can be absorbed or centered. It has become.

板ばね６は、長さがケース１の全寸とほぼ等しく、ケース１の内底面側に余裕を持って配置される大きさである。詳述すると、板ばね６は、中央部に位置してガイド溝６ｆを形成している平坦状のメイン板部６ａと、メイン板部６ａより後側板部の両側に立設されてケース底壁１３に挟持構造により装着される取付用係止部６ｂ（図１（ｂ）を参照）と、メイン板部６ａより前側板部に開口形成された切欠部６ｇと、切欠部６を区画している前側部分から斜めに立ち上がって係合体３の突出部３３に接触する当接部６ｃと、メイン板部６ａの両側に立設されてケースの両内側面に圧接及び係合構造により装着される位置決め・取付兼用の係止部６ｅと、メイン板部６ａに貫通形成されて摺動体２の前後方向への移動範囲を規制するガイド溝６ｆとを有している。 The leaf spring 6 has a length substantially equal to the entire size of the case 1 and is sized so as to be disposed on the inner bottom surface side of the case 1 with a margin. More specifically, the leaf spring 6 is placed on the both sides of the flat plate main plate portion 6a which is located at the center and forms the guide groove 6f, and on the both sides of the rear plate portion from the main plate portion 6a. 13 is provided with an attachment locking portion 6b (see FIG. 1 (b)) to be mounted by a clamping structure, a cutout portion 6g formed in the front plate portion from the main plate portion 6a, and a cutout portion 6. Abutting portions 6c that rise obliquely from the front portion and contact the protrusion 33 of the engaging body 3 and are erected on both sides of the main plate portion 6a and are attached to both inner side surfaces of the case by pressure contact and engagement structures. It has a locking portion 6e for both positioning and attachment, and a guide groove 6f that is formed through the main plate portion 6a to restrict the range of movement of the sliding body 2 in the front-rear direction.

（組立）以上の各部材は、まず、係合体３が摺動体２に枢支されると共に、板ばね６がケース１に取り付けられる。この作業において、係合体３は、摺動体２に対し筒部２６を両後片部３１同士の間に配置し、軸孔２９と軸孔３４とを同軸線上に位置だし、その状態で、シャフト３９を一方軸孔３４、軸孔２９、他方軸孔３４に挿入すると、所定角度だけ回転可能に枢支される。板ばね６は、ケース１の内底面側に対し、後両側の係止部６ｂが底壁１３に挟着され、略中間両側の係止部６ｅがケース対応部に位置決めされた状態に圧着される。これにより、板ばね６は、図５のごとくメイン板部６ａを含む後側がケース１の内底面に装着され、メイン板部６ａより前側がケース内面から浮いた状態に配置される。 (Assembly) In each of the above members, first, the engaging body 3 is pivotally supported by the sliding body 2 and the leaf spring 6 is attached to the case 1. In this operation, the engaging body 3 is configured such that the cylindrical portion 26 is disposed between the rear piece portions 31 with respect to the sliding body 2 and the shaft hole 29 and the shaft hole 34 are positioned on the coaxial line. When 39 is inserted into the one shaft hole 34, the shaft hole 29, and the other shaft hole 34, it is pivotally supported by a predetermined angle. The leaf spring 6 is crimped to the inner bottom surface side of the case 1 in such a manner that the engaging portions 6b on both rear sides are sandwiched by the bottom wall 13 and the engaging portions 6e on both substantially intermediate sides are positioned on the case corresponding portions. The As a result, the leaf spring 6 is arranged such that the rear side including the main plate portion 6a is mounted on the inner bottom surface of the case 1 and the front side from the main plate portion 6a is floated from the inner surface of the case as shown in FIG.

次に、ケース１に対して以上の係合体３付きの摺動体２が組み込まれる。この作業では、例えば、予めばね部材４が支持軸４０を介して、また、トレース部材５が上記した底壁１３の保持部に揺動可能に支持した状態にしてそれぞれケース１内に配置しておく。そして、係合体３付きの摺動体２は、突起２０ａをガイド溝１０ａに、突起２０ｂをガイド溝１４にそれぞれ嵌合した状態で、ケース１内に押し入れられると、突起２６ａが板ばね側ガイド溝６ｆに落ち込んで嵌合されたときに、ケース１に対し抜け止めされて組み付けられる。 Next, the above sliding body 2 with the engaging body 3 is incorporated into the case 1. In this operation, for example, the spring member 4 is arranged in the case 1 in advance in a state where the spring member 4 is supported in a swingable manner on the holding portion of the bottom wall 13 described above via the support shaft 40. deep. When the sliding body 2 with the engaging body 3 is pushed into the case 1 with the projection 20a fitted into the guide groove 10a and the projection 20b fitted into the guide groove 14, the projection 26a is moved to the leaf spring side guide groove. When it is lowered into 6f and fitted, it is secured to the case 1 and assembled.

この押し入れ過程では、ばね部材４の上側が筒部２６内に入り、係合体３の前板部３０の端面側に当接する。そして、ばね部材４は、摺動体２がケース１の奥へ押圧移動される過程で付勢力を増大し、該付勢力によって係合体３をシャフト３９を支点として係止状態の方向へ回転可能にする。また、トレース部材のピン部５ｃは、対応するカム溝２７の溝入口に入る。一方、板ばね側当接部６ｃは、図７のごとくストライカー７の引き抜き方向への引き力により係合体３が係止解除方向へ揺動されるときにその係合体３の揺動抵抗となって付勢力を蓄え、かつ、図８のごとくストライカー７を係合体３から引き抜くと蓄えた付勢力により係合体３を再び係止状態に切り換える。 In this pushing-in process, the upper side of the spring member 4 enters the cylindrical portion 26 and comes into contact with the end face side of the front plate portion 30 of the engagement body 3. The spring member 4 increases the urging force in the process in which the sliding body 2 is pressed and moved to the back of the case 1, and the urging force allows the engaging body 3 to rotate in the locked state with the shaft 39 as a fulcrum. To do. Further, the pin portion 5 c of the trace member enters the groove entrance of the corresponding cam groove 27. On the other hand, the leaf spring side contact portion 6c becomes a swing resistance of the engagement body 3 when the engagement body 3 is swung in the unlocking direction by the pulling force of the striker 7 in the pulling direction as shown in FIG. When the striker 7 is pulled out of the engagement body 3 as shown in FIG. 8, the engagement body 3 is again switched to the locked state by the accumulated biasing force.

（作動）以上のラッチ装置は、使用態様として、図４に例示したごとく扉９に取り付けられたストライカー７に対応して、機器類側本体８に位置決めされてねじなどにより取り付けられる。取付状態において、ラッチ装置は、通常、図５のごとく摺動体２がばね部材４により突出方向へ付勢移動（この移動は突起２６ａがガイド溝１１ｆの前端面に当たることで規制される）されると共に、係合体３が爪部３２を本体内部２４から外へ退行する方向へ回転（この回転は凸部３６が張出部１６の最も高くなった箇所に乗り上げる）されている。この状態が係合体３の係止解除状態である。 (Operation) As described above, the latch device described above is positioned on the equipment-side main body 8 and attached with screws or the like corresponding to the striker 7 attached to the door 9 as illustrated in FIG. In the mounted state, the latch device is normally urged and moved in the protruding direction by the spring member 4 as shown in FIG. 5 (this movement is restricted by the protrusion 26a hitting the front end surface of the guide groove 11f). At the same time, the engaging body 3 is rotated in a direction in which the claw portion 32 retracts outward from the inside 24 of the main body (this rotation rides on the highest portion of the protruding portion 16). This state is the unlocking state of the engagement body 3.

扉９が閉方向である図４（ａ）の左矢印方向に押し操作されると、摺動体２はストライカー７によりばね部材４の付勢力に抗してケース１内に没する方向へ押圧移動される。その移動過程では係合体３がシャフト３９を支点として係止状態の方向へ回転される。すると、係合体３は、凸部３５が張出部１６の低い側へ移行し、同時にストライカーの先端７ａの手前に設けられた凹部７ｃに爪部３２を係合し抜け止めする。このとき、係合体３は、図６のごとくトレース部材のピン部５ｃが摺動体２及び係合体３の後方移動によって上記した誘導溝２７ａから係止用誘導溝２７ｂに入り、図５の左矢印方向の押圧力を解放したときに、係止溝２７ｃに係止される。この係止により、扉９が閉状態にロック保持される。 When the door 9 is pushed in the direction of the left arrow in FIG. 4A, which is the closing direction, the sliding body 2 is pushed and moved by the striker 7 in a direction in which the sliding body 2 is submerged in the case 1 against the urging force of the spring member 4. Is done. In the moving process, the engaging body 3 is rotated in the direction of the locked state with the shaft 39 as a fulcrum. Then, in the engaging body 3, the convex portion 35 moves to the lower side of the overhang portion 16, and at the same time, the claw portion 32 is engaged with the concave portion 7c provided in front of the tip 7a of the striker to prevent it from coming off. At this time, as shown in FIG. 6, the engaging member 3 enters the locking guiding groove 27b from the guiding groove 27a by the backward movement of the sliding member 2 and the engaging member 3 as shown in FIG. When the pressing force in the direction is released, it is locked in the locking groove 27c. By this engagement, the door 9 is locked and held in the closed state.

また、以上の扉保持状態から図５の解除状態に切り換えるときは、扉９を閉じ方向へ少し押した後、該押し力を解放する。すると、トレース部材のピン部５ｃは、図６（ｂ）のごとく上記した係止溝２７ｃから解除用誘導溝２７ｄ、復帰溝２７ｅを経て再び溝入口に戻り、同時に、係合体３が当初の解除位置に切り換えられる。このラッチ装置は、以上のような通常の作動において従来と同様であるが、次の点で改良されている。 Further, when switching from the above-described door holding state to the release state of FIG. 5, the pressing force is released after the door 9 is pushed slightly in the closing direction. Then, the pin portion 5c of the trace member returns to the groove entrance again from the locking groove 27c described above through the release guiding groove 27d and the return groove 27e as shown in FIG. 6B, and at the same time, the engaging body 3 is released from the initial state. Switch to position. This latch device is the same as the conventional one in the normal operation as described above, but is improved in the following points.

すなわち、以上のラッチ装置では、通常時の作動を従来と同様に維持しながら、無理抜き荷重、つまり係合体３の係止状態において、上記した扉９に対し扉開方向に外力が作用したとき、図７（ａ）のごとく係合体３が爪部３２を本体内部２４から外へ退行するよう回転、つまり無理抜きにより係止解除状態に切り換えられる際の荷重ないしは強度を板ばね６によって高めることができ、更には板ばね６として当接部６ｃ及び当接部６ｃとメイン板部６ａとの間の板部の幅、傾き、長さなどによって変形度合いを変えるだけで、用途に応じた最適な無理抜き荷重に変更できる。この点を図７と図８を参照して明らかにする。 That is, in the latch device described above, when an external force is applied to the door 9 in the door opening direction in the forced release load, that is, in the locked state of the engaging body 3 while maintaining the normal operation as in the conventional case. As shown in FIG. 7A, the load or strength is increased by the leaf spring 6 when the engaging body 3 is rotated so as to retract the claw portion 32 from the inside 24 of the main body, that is, when the engaging body 3 is switched to the unlocked state by forcibly removing. In addition, the plate spring 6 can be optimized according to the application by simply changing the degree of deformation according to the contact portion 6c and the width, inclination, length, etc. of the plate portion between the contact portion 6c and the main plate portion 6a. It can be changed to an unreasonable unloading load. This point will be clarified with reference to FIGS.

図７は図６（ａ）のごとく係合体３の係止状態において、上記した扉９に対し扉開方向である図７（ａ）の矢印方向に外力が作用した態様を示している。この態様では、係合体３が外力により前方へ引っ張られると、シャフト３９を支点として時計回りの方向へ動こうとする。その際、係合体３は、爪部３２が開口２１ａの対応部に摺接しながら、本体内部２４から退行、つまり板ばね側当接部６ｃに対する圧接度合いを強めて係止解除方向へ回転する。当接部６ｃにはその圧接により付勢力が蓄積される。 FIG. 7 shows a state in which an external force is applied to the door 9 in the locked direction of the engaging body 3 as shown in FIG. 6A in the arrow direction of FIG. In this embodiment, when the engagement body 3 is pulled forward by an external force, the engagement body 3 tends to move in the clockwise direction with the shaft 39 as a fulcrum. At this time, the engaging body 3 rotates in the unlocking direction with the degree of pressure contact with the leaf spring side contact portion 6c intensified by retreating from the inside of the main body 24 while the claw portion 32 is in sliding contact with the corresponding portion of the opening 21a. The urging force is accumulated in the contact portion 6c by the pressure contact.

以上のような付勢力の蓄積は、係合体３が図７（ａ）のごとく係止解除状態に達し、ストライカー７の先端７ａが開口２１ａを横切って外へ移動される直前で最大となる。すなわち、この構造では、係合体３がシャフト３９を支点とし係止状態から係止解除状態に回転して切り換えられるときに、板ばね側当接部６ｃの変形抵抗を受けることにより課題に記載した無理抜き荷重ないしは強度を高くすることができる。この無理抜き荷重ないしは強度は、例えば、当接部６ｃやその付近の板部の幅などを変えることにより、用途に応じた任意の大きさに簡単に変更できる。 Accumulation of the urging force as described above is maximized immediately before the engagement body 3 reaches the unlocked state as shown in FIG. 7A and the tip 7a of the striker 7 is moved outward across the opening 21a. That is, in this structure, when the engagement body 3 is rotated and switched from the locked state to the unlocked state with the shaft 39 as a fulcrum, the deformation resistance of the leaf spring side contact portion 6c is received and described in the problem. Unreasonable load or strength can be increased. This unreasonable load or strength can be easily changed to an arbitrary size according to the application, for example, by changing the width of the contact portion 6c or the plate portion in the vicinity thereof.

図８は図７のごとく無理抜きした後のラッチ装置を再び使用するときの操作例を示している。つまり、図８（ａ）のラッチ装置は、図６の態様からストライカー７を省いた状態であり、トレース部材のピン部５ｃがカム溝の係止溝２７ｃに係止されている。このため、使用者は、指などによりケース１から突出している摺動体の本体部分を同図の矢印方向に一旦押して離す。すると、上記したごとくトレース部材のピン部５ｃは図８（ｂ）のごとく係止溝２７ｃから解除用誘導溝２７ｄ、復帰溝２７ｅを経て溝入口に戻り、同時に、係合体３は図５の解除状態に切り換えられる。これにより、ラッチ装置は再び通常使用時の初期態様に切り換えられる。 FIG. 8 shows an operation example when the latch device after being forcibly removed as shown in FIG. 7 is used again. That is, the latch device of FIG. 8A is in a state where the striker 7 is omitted from the embodiment of FIG. 6, and the pin portion 5c of the trace member is locked to the locking groove 27c of the cam groove. For this reason, the user once pushes and releases the main body portion of the sliding body protruding from the case 1 with a finger or the like in the direction of the arrow in FIG. Then, as described above, the pin portion 5c of the trace member returns from the locking groove 27c to the groove entrance through the release guide groove 27d and the return groove 27e as shown in FIG. 8B, and at the same time, the engaging body 3 is released from FIG. Switch to state. As a result, the latch device is again switched to the initial state during normal use.

（変形例）図９（ａ）は板ばねを摺動体に取り付けるようする変形例１を示し、図９（ｂ）は板ばねを係合体側に取り付けるようにする変形例２を示している。各変形例の説明では、上記形態と同じか類似する部材に同じ符号を付し、変更した構成についてだけ詳述する。 (Modification) FIG. 9A shows Modification 1 in which the leaf spring is attached to the sliding body, and FIG. 9B shows Modification 2 in which the leaf spring is attached to the engaging body. In description of each modification, the same code | symbol is attached | subjected to the same or similar member as the said form, and only the changed structure is explained in full detail.

変形例１の板ばね６Ａは、摺動体２の後延長部２５側に取り付けられようにした一例である。すなわち、この板ばね６Ａは、上記板ばね６に比べ、全寸が短くなっていて、平坦状のメイン板部６ａと、メイン板部６ａより前側板部に開口形成された切欠部６ｇと、切欠部６を区画している前側部分から斜めに立ち上がって係合体３の突出部３３に接触する当接部６ｃと、メイン板部６ａの両側に立設されて後延長部２５の下両側つまり筒部２６の両側に設けられた凹部２９に係合される取付用係止部６ｈとを有している。なお、この場合は、摺動体２の移動範囲を規制する構造として、突起２６ａ及びガイド溝６ｆに代えて、例えば、後延長部２５の後上面に突設されたガイド凸部２５ａ、及びそのガイド凸部２５ａと嵌合して移動範囲を規制する溝をケース１の内側に付設する。 The leaf spring 6A of Modification 1 is an example in which the leaf spring 6A is attached to the rear extension 25 side of the sliding body 2. That is, the leaf spring 6A has a shorter overall size than the leaf spring 6 and has a flat main plate portion 6a and a notch portion 6g formed in the front plate portion from the main plate portion 6a. The abutting portion 6c that rises obliquely from the front side portion that defines the notch portion 6 and contacts the protruding portion 33 of the engaging body 3, and the lower side of the rear extension portion 25 that stands on both sides of the main plate portion 6a. It has the attachment latching | locking part 6h engaged with the recessed part 29 provided in the both sides of the cylinder part 26. As shown in FIG. In this case, instead of the protrusion 26a and the guide groove 6f, for example, as a structure for restricting the moving range of the sliding body 2, a guide convex portion 25a protruding from the rear upper surface of the rear extension portion 25 and its guide A groove that fits with the convex portion 25 a and restricts the movement range is provided inside the case 1.

変形例２の板ばね６Ｂは係合体３側に取り付けられようにした一例である。すなわち、この板ばね６Ｂは、上記板ばね６Ａよりも全寸が短くなっており、平坦状のメイン板部６ａと、メイン板部６ａより前側板部に開口形成された切欠部６ｇと、切欠部６を区画している前側部分から斜めに立ち上がって係合体３の突出部３３に接触する当接部６ｃと、メイン板部６ａの両側に立設されて係合体３の回転中心つまりシャフト３９の端面に係止される取付用係止部６ｈとを有している。 The leaf spring 6B of Modification 2 is an example that is attached to the engagement body 3 side. That is, the leaf spring 6B is shorter in length than the leaf spring 6A, and has a flat main plate portion 6a, a notch portion 6g formed in the front plate portion from the main plate portion 6a, and a notch The abutment portion 6c that rises obliquely from the front portion that defines the portion 6 and contacts the protrusion 33 of the engagement body 3, and the rotation center of the engagement body 3, that is, the shaft 39, is provided on both sides of the main plate portion 6a. And an attachment locking portion 6h that is locked to the end surface of the mounting.

なお、本発明は以上の形態に何ら制約されることなく、請求項で特定される要件を備えておれば、必要に応じて種々変更可能なものである。その例として、係合体３を摺動体２に枢支する構造としては、シャフト３９に代えて一方の軸穴と他方の軸部との嵌合構造でもよい。また、トレース部材及びカム溝としては図１０のような構造でも差し支えない。 It should be noted that the present invention is not limited to the above-described embodiments, and can be variously changed as necessary as long as the requirements specified in the claims are provided. As an example, the structure in which the engaging body 3 is pivotally supported by the sliding body 2 may be a fitting structure of one shaft hole and the other shaft portion instead of the shaft 39. Further, the trace member and the cam groove may have a structure as shown in FIG.

１…ケース（１１ａはカイド溝、１６は張出部、１８は支持軸）
２…摺動体（２０は本体、２２は突当部、２３は軸穴、２４ａは軸穴）
３…係合体（３０は前板部、３１は後片部、３２は爪部、３３は突出部）
４…ばね部材（４０は支持軸）
５…ピン部材（５ａは取付部、５ｂは腕部、５ｃはピン部）
６…板ばね（６ａはメイン板部、６ｂは取付用係止部、６ｃは当接部）
６Ａ…板ばね（６ａはメイン板部、６ｈは取付用係止部、６ｃは当接部）
６Ｂ…板ばね（６ａはメイン板部、６ｋは取付用係止部、６ｃは当接部）
７…ストライカー（７ａは爪部、７ｂは凹部、７０はベース）
８…本体
９…扉
２１…後延長部（２５は上側部分、２６は筒部、２９は軸孔）
２７…カム溝（２８はハート形島、２７ｃは係止溝） 1 ... Case (11a is a guide groove, 16 is a protruding portion, 18 is a support shaft)
2 ... Sliding body (20 is a main body, 22 is an abutting portion, 23 is a shaft hole, 24a is a shaft hole)
3 ... engaging body (30 is front plate part, 31 is rear piece part, 32 is claw part, 33 is protrusion part)
4 ... Spring member (40 is a support shaft)
5 ... Pin member (5a is a mounting part, 5b is an arm part, 5c is a pin part)
6 ... leaf springs (6a is a main plate part, 6b is a locking part for mounting, and 6c is a contact part)
6A ... leaf spring (6a is a main plate portion, 6h is a locking portion for mounting, and 6c is a contact portion)
6B: leaf spring (6a is a main plate portion, 6k is a locking portion for mounting, and 6c is a contact portion)
7 ... Striker (7a is a claw, 7b is a recess, 70 is a base)
8 ... Main body 9 ... Door 21 ... Rear extension (25 is upper part, 26 is cylindrical part, 29 is shaft hole)
27 ... Cam groove (28 is a heart-shaped island, 27c is a locking groove)

Claims

ケースと、前記ケースに配置されたカム溝付きの摺動体と、前記摺動体を前記ケースから突出する方向へ付勢するばね材と、前記摺動体に枢支され先端側爪を摺動体内から突出して被係脱部材を係止する係止状態と摺動体内に退避する係止解除状態とに切換可能な係合体と、前記カム溝を動くトレース部材とを備え、前記摺動体が前記ばね材の付勢力に抗し移動されると移動後の位置に前記カム溝及びピン部材を介し係止され、かつ前記係合体が係止解除状態から係止状態に切り換えられるラッチ装置において、
前記ケースの内部に配置されて、前記係合体が前記被係脱部材を係止している係止状態で、前記被係脱部材の引き抜き方向への引き力により係止解除方向へ揺動されるときに該係合体の揺動抵抗となって付勢力を蓄えると共に、前記被係脱部材を引き抜くと前記蓄えた付勢力により前記係合体を再び係止状態に切り換える無理抜き荷重増大用の板ばねを有していることを特徴とするラッチ装置。 A case, a sliding body with a cam groove disposed in the case, a spring material for biasing the sliding body in a direction protruding from the case, and a tip side claw pivoted by the sliding body from the sliding body An engaging body that can be switched between a locking state that protrudes and locks the engaged / disengaged member and an unlocking state that retracts into the sliding body, and a trace member that moves in the cam groove, and the sliding body includes the spring In a latch device that is locked to the position after the movement through the cam groove and the pin member when moved against the urging force of the material, and the engaging body is switched from the unlocked state to the locked state,
It is arranged inside the case and is rocked in the unlocking direction by the pulling force in the pulling direction of the engaged / disengaged member in the locked state where the engaging body locks the engaged / disengaged member. When the engaging member is pulled out, the urging force is stored and when the engaged member is pulled out, the urging force is stored to switch the engaging member to the locked state again. A latch device comprising a spring.

前記板ばねは前記ケース内面に取り付けられていることを特徴とする請求項１に記載のラッチ装置。 The latch device according to claim 1, wherein the leaf spring is attached to the inner surface of the case.

前記板ばねは前記摺動体又は前記係合体側に取り付けられていることを特徴とする請求項１に記載のラッチ装置。 The latch device according to claim 1, wherein the leaf spring is attached to the sliding body or the engagement body side.

前記板ばねは両側に立設された取付用係止部を有していることを特徴とする請求項１から３の何れかに記載のラッチ装置。 The latch device according to any one of claims 1 to 3, wherein the leaf spring has attachment locking portions erected on both sides.

前記板ばねは斜めに立ち上がって前記係合体に接触する当接部を有していることを特徴とする請求項１から４の何れかに記載のラッチ装置。 The latch device according to any one of claims 1 to 4, wherein the leaf spring has an abutting portion that rises obliquely and contacts the engaging body.

前記板ばねは前記摺動体の移動範囲を規制するガイド溝を有していることを特徴とする請求項１、２、４、５の何れかに記載のラッチ装置。 6. The latch device according to claim 1, wherein the leaf spring has a guide groove for restricting a moving range of the sliding body.