JP5171547B2 - Latch device - Google Patents

Description

  The present invention is the first push operation among latch devices used when a second member (for example, a movable body such as a lid) is detachably locked to a first member (for example, a box-shaped base). The push / push locking mechanism that locks the engaged / disengaged member on the second member side and releases the locking by the next pushing operation (this is called a push-lock / push-open mechanism or abbreviated as a push type) The present invention also relates to a latch device suitable for the same).

  FIG. 8 shows a push-type latch device disclosed in Patent Document 1. In this structure, the housing 2 has the abutting portion 32 and the cam groove 5 that come into contact with the striker 62 that is a member to be engaged / disengaged, and is disposed in the housing 2 to be pressed against the urging force of the spring member 45. A sliding body 30, a distal end side claw portion 39 and a proximal end convex portion 38c, and an engaging body 37 pivotally supported by the sliding body 30, and a tracing pin member 6. . Among these, the engagement body 37 is pivotally supported in a state in which the shaft portions 37 a provided on both sides are fitted to the corresponding shaft hole portions of the slide body 30, and the position movement of the slide body 30 causes the same (b). Thus, the claw portion 39 is projected onto the abutting portion 32 to be switched to a locking position where the striker 62 is locked, and the claw portion 39 is switched to a locking release position where the claw portion 39 is retracted from the abutting portion 32 as shown in FIG. . In the unlocking position, the sliding body 30 is moved to the inlet side of the housing 2 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 housing 2. Keep state. In the locking position, the sliding body 30 is moved to the back side against the biasing force of the spring member 45 by the pushing force of the striker 62, and is held at the position after the movement through the engagement of the cam groove 5 and the pin member 6. Then, the engaging body 37 moves the convex portion 38c to a portion lowered from the protruding portion 28, and tilts to project the claw portion 39 from the inside of the opening 33 on the sliding body side.

In other words, the latch device described above switches the engaging body 37 from the unlocking position to the locking position by the pressing force of the striker 62 against the sliding body 30 and is locked by the next pressing force of the striker 62 against the sliding body 30. Switch from position to unlocking position. At that time, the spring member 45 is locked to a projecting piece provided on the lower middle of the engagement body 37 on the upper side, while accumulating urging force in the process of the sliding body 30 being pushed and moved to the back, The engaging body 37 is rotated counterclockwise in the figure with the shaft portion 37a as a fulcrum, and can be switched from the unlocking position to the locking position. As a form of use, when the latch device is attached to the main body side and the striker 62 is provided on the door side, the state (b) holds (locks) the door to the main body, and the door side striker 62 is on the main body side. It is latched by the engaging body 37 constituting the latch device. When the door is pushed again toward the main body, the pin member 6 is released from the locking groove of the cam groove 5 and is released as shown in FIG. Such a structure is the same in the latch devices of Patent Documents 2 and 3.
JP 2004-137725 A JP 2001-262915 A JP 2006-22543 A

  The above-described latch device is used in various types of large and small devices, and for example, a device having a total size of about 30 to 40 mm is provided due to a demand for reduction in size and weight. However, in the conventional structure, in order to achieve further compactness, for example, about 10 to 15 mm as the length of the housing, if the shape is simply reduced while maintaining the positional relationship between the members, the rigidity of the engagement body is sufficient. It is difficult to make the engaging body relatively large.

  Therefore, an object of the present invention is to expand the application by enabling more compactness while maintaining the locking force and rigidity of the engaging body as much as possible.

  In order to achieve the above object, the present invention provides a housing, a sliding body that has a contact portion and a cam groove that come into contact with a member to be attached, and is arranged so as to be able to advance and retreat with respect to the housing, and the sliding body from the housing. A spring member that is biased in a protruding direction, and a claw portion on the distal end side that is supported rotatably with respect to the sliding body, and a latch device as shown in FIG. And a position where the claw portion protrudes so as to approach the abutment portion as shown in FIG. And a pin member that traces the cam groove, and when the sliding body is pressed and moved against the urging force of the spring member, The position after movement is held via the cam groove and pin member. In the latch device in which the engaging body is switched from the unlocking position to the locking position, the engaging body maintains a predetermined gap with the claw portion and the claw portion and protrudes in the same direction as the claw portion. A projecting portion that forms a pivotal support that is rotatably supported by the sliding body, and is supported between the sliding body and disposed at the locking position between the claw portion and the projecting portion; It is characterized in that the abutment is located.

  The invention of claim 2 is specified from the structural features of the sliding body, whereas the above invention is specified from the configuration of the engaging body, and the same prerequisites are provided, and the sliding body is located on the entrance / exit side of the housing. The engaging portion is provided so that at least a part is disposed between the abutting portion to be disposed, the cam groove disposed on the back side of the housing, and the abutting portion and the cam groove. It is characterized by having a pivotally supporting portion that is rotatably supported.

  According to a third aspect of the present invention, in the first or second aspect, the slide body includes a substantially reverse concave main body and the cam groove formed in a narrowed portion protruding rearward of the main body. An extension part, the front end surface of the main body having an inverted concave shape is used as the abutting part, and shaft holes or shaft parts for pivot parts are formed on both side surfaces, and the engaging body is provided with the claw part. A front plate portion, a rear piece projecting rearward from the front plate portion, and a convex portion provided on a side surface of the rear piece portion, the convex portion being a narrow width of the rear extension portion. It is characterized by being able to be switched from the locking position to the locking release position by riding on the overhanging portion provided in the housing while shifting to the position.

  According to the first aspect of the present invention, the engaging body has a claw portion and a pivot supporting portion provided at a predetermined interval as shown in FIG. The abutting portion of the sliding body is located between the claw portion and the protruding portion in the state of being arranged in the position. For this reason, as a latch device, the engaging body is inserted into the inside of the sliding body so that the corresponding portion is inserted more, and the engaging body is supported with respect to the sliding body, that is, in the width direction or the thickness direction of the sliding body with the engaging body. The size, and thus the thickness of the housing can be shortened (Note that the length of the housing is reduced by simply allowing the sliding body to protrude from the inside of the housing at the unlocking position of the engaging body as in the form. Yes, because the pivot part of the engagement body is arranged behind or directly below the abutment part, the shape of the engagement body (for example, the distance from the pivot part of the engagement body to the claw part and the pivot part to the convex part) As a result, it is possible to reduce the design flexibility.

  According to the second aspect of the present invention, compared to the conventional structure, the sliding body is disposed on the inlet / outlet side of the housing as shown in FIG. 4, the cam groove disposed on the rear side of the housing, the abutting portion and the cam portion. And a pivotal support portion that is provided so that at least a part thereof is disposed between the two and supports the engaging body. Therefore, as the latch device, the engaging body is inserted into the inside of the sliding body so that the corresponding portion is inserted more in the same manner as in the first aspect, and the dimension in the width direction or the thickness direction of the sliding body with the engaging body is pulled. The thickness of the housing can be shortened (again, the length of the housing can be shortened by simply projecting the sliding body from the inside of the housing to the outside). Since it is arranged directly below, the design freedom can be expanded as the shape of the engaging body, and the compactness can be achieved.

  In the invention of claim 3, specific examples of the shapes of the sliding body and the engaging body are clarified, thereby facilitating the implementation of the invention of claims 1 and 2.

  The best mode of the present invention will be described below with reference to FIGS. In the drawings, the latch device is enlarged (for example, the length of the housing is about 15 mm or less), and the details are simplified except for the component drawings of FIGS. In the following description, the device structure, assembly, and operation will be described in detail.

The latch device in the form of (device structure) has a housing 1 that is open at one end, an abutting portion 22 that abuts against a striker 9 that is a member to be engaged and disengaged, and a cam groove 27 that can be moved forward and backward. The sliding body 2 that is formed, and a locking position that is supported rotatably with respect to the sliding body 2 and that allows the striker 9 to be locked by projecting the claw portion 32 onto the abutting portion 22 and above the abutting portion 22. The engagement body 3 is switched to the unlocking position retreating from the position, the spring member 4 biasing the sliding body 2 in the direction protruding from the housing 1, and the pin member 5 that traces the cam groove 27. When the moving body 2 is pressed and moved against the urging force of the spring member 4, the position after the movement is held via the cam groove 27 and the pin member 5, and the engaging body 3 is moved from the unlocking position. Push-push that can be switched to the locking position Consisting of a stop mechanism.

  The latch device is attached to, for example, a one-dot chain line in FIG. 1B and a mounting frame 7a provided on the main body 7 side of the equipment shown in FIG. In the use example of engaging and disengaging the striker 9 attached to the door 8, when the door 8 is pushed in the direction of the closed position against the urging force of the urging means (not shown), the door 8 is moved through the striker 9. When the door 8 is further pushed in the same direction, the lock on the striker 9 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. Moreover, although the housing 1, the sliding body 2, and the engaging body 3 are resin molded products, materials other than resin may be used.

  Here, as shown in FIGS. 3 and 5, the housing 1 has a bottomed cylindrical shape in which the inside is defined by upper and lower walls 10, 11, both side walls 12, and a bottom wall 13, and one end side is opened. . Further, the housing 1 has an outer surface 15 constituting one end side of both side walls 12 protruding one step, and is inserted into the mounting frame 7a on the main body side so as to be prevented from coming off as shown in the drawing. Among these, on the inner surface of the upper wall 10, pin restricting vertical ribs 14 project in pairs corresponding to the U shape of the pin member 5. Each vertical rib 14 extends from the bottom wall 13 to the front side, and is provided in a state in which the rear side protrudes one step larger, and restricts the U-shaped side portions 5b of the pin member 5 as shown in FIG. The lower wall 11 is located in the middle of the front and rear, and penetrates the guide groove 11a that restricts the moving range of the sliding body 2, the shallow introduction groove 11b that communicates with the guide groove 11a from one end side, and the inner wall protrudes on both sides. An overhanging portion 16 is provided that allows the engaging body 3 to rotate in the unlocking direction. The both side walls 12 are mounted with an outer surface 15 having a taper 15a with one side surface bulging out of the entrance / exit side frame portion and a lower corner portion cut out, and a U-shaped slit 12a and projecting the tip side outward. The elastic locking claw 17 and the corners on one side (upper side but lower side) of the opposing wall among the four corners of the rectangle are notched from the substantially front and rear intermediate portions to the front of the outer surface 15. Taper 10a and a notch 12b provided on the rear side of the taper 10a. Relief recesses 12c are respectively provided on the inner surfaces at one end of both side walls 12 so as to face each other. The relief recess 12c is a relief for a mold for forming the elastic locking claw 17 and the like.

  The bottom wall 13 is formed with a die-cutting hole 13a penetrating on both lower sides, a substantially L-shaped pin insertion hole 13b penetrating on both upper sides, and a small slit 13c between the pin insertion holes 13b. The elastic clamping pieces 13d and 13e, the spring support shaft 18 protruding from the inner surface, and the like are provided. Each pin insertion hole 13b has a hole width slightly larger than the wire diameter of the pin member 5, and allows the substantially U-shaped pin member 5 to be inserted into the case from this hole. The elastic clamping pieces 13d and 13e are arranged to face each other through a small gap so that the U-shaped intermediate portion 5a of the pin member 5 can be held with a predetermined clamping force from the front-rear direction as shown in FIG. The support shaft 18 projects in the middle of the left and right. The pin member 5 is pivotally supported by the elastic clamping pieces 13 d and 13 e, and the spring member 4 is held by the support shaft 18. The spring member 4 is a coil spring, the lower side is mounted on the support shaft 18, and the upper side is locked to the protruding piece part 34 of the engaging body 3 from within a cylindrical part 26 of the sliding body 2 described later.

  By the way, the above housing 1 is devised as a mounting structure to the main body 7 side from the viewpoint of compactness as follows. That is, in the conventional structure (for example, refer to Patent Document 1), in order to mount the housing on the main body side mounting frame by the insertion operation, the retaining frame portion that projects the outer periphery of the inlet / outlet side of the housing, and the above-described It has an elastic locking claw (same as the elastic locking claw 17) provided on the opposite wall surface, and is not shown in each of Patent Documents 1 to 3, but has a convex section in the longitudinal direction for positioning ( The convex shape may be fitted to the concave shape on the mounting frame side from the rear side in front of the retaining frame portion. However, in this structure, instead of the conventional retaining frame portion, only the side surfaces 12 and 12 of the entrance / exit side frame portion of the housing 1 are expanded by one step, and the upper and lower surfaces 10 and 12 are formed as outer surfaces 15 with a taper 15a. 11 was slimmed. Further, instead of the conventional positioning projection provided in the longitudinal direction on the outer surface, each corner portion on one side of the opposing wall among the cylindrical portions defining the housing 1 (both corner portions of the upper wall 10 in this example). Was formed in the positioning taper 10a cut out to the front of the outer surface 15 to achieve a slim outer periphery. Of course, in this structure, the mounting frame 7a requires a fitting hole 6 corresponding to the cross section of the housing 1, that is, a tapered corner portion 6a for positioning corresponding to the taper 10a.

  As shown in FIGS. 3 and 6, the sliding body 2 includes a substantially reverse concave main body 20 disposed on the entrance / exit side of the housing 1, and a rear extension that protrudes behind the main body 20 and is narrower than the main body 20. 21. The main body 20 defines a substantially inverted concave hollow portion 24 opened downward, a front end surface is set as the abutting portion 22, and a frame portion 23 protruding forward from a lower portion of the front end surface The shaft hole 24a for the pivot portion provided on the coaxial line with respect to both side surfaces 20b defining the cavity portion 24, and both sides of the portion projecting the rear extension portion 21 among the rear surface side facing the abutting portion 22 And a through-hole 20d formed in the above. In other words, the cavity portion 24 of the main body 20 is partitioned on the front end side of the abutting portion 22, the upper surface 20 a, both side surfaces 20 b, and the rear extension portion 21. The upper surface 20a has a front rib and a rear rib so that good sliding characteristics can be obtained when the upper surface 20a is disposed in the housing 1. The frame part 23 forms an opening 23a through which a claw part 32 of the engagement body 3 to be described later can be projected and retracted with a margin.

  The rear extension 21 includes an upper portion 25 having heart-shaped cam grooves 27 on both sides and a lower cylindrical portion 26 extending in the same direction as the upper portion 25. The cam grooves 27 on both sides have substantially the same shape as shown in FIG. 6D, are provided around the convex cam island 28, and extend from the rear side to the front lower side, and on the front side of the guide groove 27a. The guide groove 27b for release and the guide groove 27c for release which are separated from each other up and down, the concave lock groove 27c located between the guide grooves 27b and 27d and on the rear side, and the guide groove 27d to the rear side. The return groove 27e extends and the like. On the other hand, the cylinder portion 26 forms a cylinder hole in which the inside of the cylinder can be loosely fitted on the upper side of the support shaft 18 and the spring member 4, and is projected from the front lower side to fit into the guide groove 11a. It has a projection 26a to be joined, and a guide wing 29 projecting toward both sides on the rear upper side.

  By the way, the above sliding body 2 is devised as follows from a viewpoint of compactness. That is, in this structure, first, the sliding body 2 is projected out of the housing at the unlocking position of the engaging body 3 to be described later with respect to the housing 1, thereby making it possible to shorten the length of the housing 1 in the length direction. ing. In addition, the sliding body 2 has a rear extension portion 21 that forms a relief portion and a cam groove 28 that are protruded rearward of the main body 20 and cut out so as to be narrower than the main body. Moreover, the main body 20 has a cavity portion 24 provided on the rear side of the abutting portion 22 and defined by at least both side surfaces 20b, and pivot support shaft holes 24a provided on the side surfaces 20b. In other words, in this structure, the pivotal support shaft hole 24a (a shaft portion may be used instead of the shaft hole 24a) is provided behind or directly below the abutting portion 22, so that the engagement body 3 corresponds to the inside of the sliding body. So that the dimension in the width direction or the thickness direction in a state where the engaging body 3 is pivotally supported by the sliding body 2 can be shortened, or the degree of freedom is increased in the size and shape of the engaging body 3. To make it more compact.

  As in the prior art, the pin member 5 comprises a U-shaped intermediate portion 5a, both side portions 5b, and a tip 5c bent inward at the free end side of each side portion 5b as shown in FIG. The width dimension is formed slightly larger than the lower width dimension. The lower width dimension is in the housing 1 and substantially coincides with the width dimension between the inner surfaces of the side walls 21.

  As shown in FIGS. 3 and 8, the engagement body 3 includes a front plate portion 30 and rear piece portions 31, 31 protruding rearward from the front plate portion 30. The front plate part 30 has a claw part 32 protruding upward, a protrusion part 33 that protrudes in the same direction as the claw part 32 while maintaining a predetermined gap with the claw part 32, and is protruded in the left and right middle of the rear end surface. A projecting piece portion 34 that enters the cylinder of the cylinder portion 26 is provided. The nail | claw part 32 is a magnitude | size which can be freely entered into or retracted into the opening 23a on the sliding body side. The two projecting portions 33 are formed with pivot shaft portions 35 projecting on the same axis. Convex portions 36 are respectively provided on the rear outer surfaces of both rear piece portions 31.

  By the way, the above engagement body 3 is devised as follows from the viewpoint of compactness. In other words, in this structure, the claw portion 32 and the projection portion 33 that maintains a predetermined gap with the claw portion 32 and projects in the same direction as the claw portion to form a pivot portion shaft portion 35 (may be a shaft hole). And is abutted between the claw portion 32 and the projecting portion 33 in a state where it is pivotally supported (fitted with the shaft portion 35 and the shaft hole 24) with respect to the sliding body side main body 20 and disposed at the locking position. The portion 22 is positioned and the rear piece portion 31 and the convex portion are formed on the narrowed portion of the sliding body side rear extension portion 21 in the state where the portion 22 is disposed at the unlocking position, the above-described relief portion (see FIG. 6C). I try to escape 36. For this reason, as a latch apparatus, the dimension of the width direction or thickness direction in the state which supported the engaging body 3 with respect to the sliding body 2 by making the corresponding part enter the inside of the sliding body 2 more, and shortened the dimension of the thickness direction. Since the center of rotation of the engaging body 3 (the shaft portion 35 fitted in the shaft hole 24) is set behind or just below the abutting portion 22, the shape of the engaging body 3 is A distance between a certain shaft portion 35 and the claw portion 32, a distance between the shaft portion 35 and the convex portion 36, and the like are arbitrarily set to facilitate the downsizing.

(Assembly) In each of the above members, for example, the engaging body 3 is first assembled to the sliding body 2. In this operation, the shaft portions 35 on both sides are pushed into the shaft hole 24a from the inside of the hollow portion of the sliding body 2 from the state of FIG. Then, the engaging body 3 is pivotally supported by a predetermined range with the shaft portion 35 as a fulcrum, and the claw portion 32 is unlocked within the opening 23a as shown in FIGS. 2 (b) and 4 (c). As shown in FIGS. 2 (a) and 4 (a), the position can be switched to a locking position that protrudes from the opening 23a and presses the convex portion of the striker 9 or the claw 9a from above. Further, the above engaging body 3 is pivotally supported on the sliding body side main body 20 through the fitting of the shaft hole 24a and the shaft portion 35, and the claw portion 32 protrudes from the opening 23a onto the abutting portion 22. In a state where the abutting portion 22 is positioned between the claw portion 32 and the protruding portion 33 in a state where the claw portion 32 is disposed at the locking position, the claw portion 32 is retracted into the opening 23a and is disposed at the locking release position. The corresponding portion is allowed to escape to the narrow relief portion of the rear extension 21.

  Next, the sliding body 2 with the engaging body 3 is assembled in the housing 1. In this operation, for example, the spring member 4 is mounted on the support shaft 18 in advance, and the pin member 5 is swingably held on the bottom wall 13 and disposed in the housing 1. The pin member 5 is formed by inserting the distal ends 5c on both sides into the housing from the pin insertion holes 13b and then forcibly moving the U-shaped intermediate portion 5a toward the elastic clamping pieces 13d and 13e. Is sandwiched between. In this clamping state, the pin member 5 is held upright in the housing 1, and the U-shaped side portions 5b are regulated between the regulating vertical rib 14 and the corresponding inner side surface. Further, when the sliding body 2 with the engaging body 3 is pushed into the housing 1, the sliding body 2 is prevented from being detached from the housing 1 and assembled when the protrusion 26 a is fitted into the guide groove 11 a from the introduction groove 11 b. . In this pushing-in process, the upper side of the spring member 4 enters the cylindrical portion 26 and comes into contact with the protruding piece portion 34 of the engaging 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, and the urging force enables the engaging body 3 to rotate in the locking position direction with the shaft portion 35 as a fulcrum. Further, both ends 5 c of the pin member 5 enter the groove entrance of the corresponding cam groove 27.

(Operation) The completed latch device is provided in the apparatus-side main body 7 as shown in FIG. 1 (b) corresponding to the striker 9 attached to the door 8 as shown in FIG. 4 (a). It is inserted into the attached mounting frame 7a and attached via an elastic locking claw 17 or the like. In the mounted state, the latch device is normally regulated by the sliding member 2 being urged in the protruding direction by the spring member 4 as shown in FIG. 2B (this movement is controlled by the protrusion 26a hitting the front end surface of the guide groove 11a). ) And the claw portion 32 is rotated in a direction in which the claw portion 32 enters the sliding body side opening 23a (this rotation rides on the highest portion of the protruding portion 16). This state is the “lock release position of the engagement body 3”. When the door 8 is pushed in the direction of the left arrow in FIG. 4A, which is the closing direction, the sliding body 2 is pushed by the striker 9 in the direction of sunk in the housing against the urging force of the spring member 4. Moved. In the moving process, the engaging body 3 is rotated in the locking position direction with the shaft portion 35 as a fulcrum. Then, in the engaging body 3, the convex portion 36 elastically shifts to the lower side of the overhang portion 16, and at the same time, the striker claw 9 a is prevented from coming off via the claw portion 32. At this time, as shown in FIG. 4 (a), the engagement body 3 enters the locking guide groove 27b from the guide groove 27a through the sliding body 2 and the rearward movement of the engagement body 3 as shown in FIG. When the pressing force in the direction of the arrow is released, it is locked in the locking groove 27c. By this locking, the door 8 is held (locked) in the closed state.

  When switching from the above-described door holding state to the release state of FIG. 4C, the pushing force is released after the door is pushed in the closing direction as shown in FIG. 4B. Then, both ends 5c of the pin member 5 return to the groove inlet from the guide groove 27a through the release guide groove 27d and the return groove 27e described above from the above-described locking groove 27c, and at the same time, the engagement body 3 is released from the initial state. Switch to position.

  In the conventional latch device, since the engaging body is in frictional contact with the inner surface of the opening of the sliding body at the locking position, it becomes difficult to rotate when used in a severe environment such as a cold region. There is a risk that the normal locking operation, that is, switching from the unlocking position to the locking position may not be performed. On the other hand, in the above structure, the engaging body 3 has the protruding portion 33 that maintains a predetermined gap with the claw portion 32 and protrudes in the same direction as the claw portion to form the shaft portion 35 for the pivot portion. The abutting portion 22 is positioned between the claw portion 32 and the projecting portion 33 in a state where the sliding body 2 is rotatably supported with respect to the sliding body 2, or the sliding body 2 is disposed in the housing 1. And a cam groove 27 disposed on the back side of the housing 1, and a pivot shaft hole 24a provided between the abutment 22 and the cam groove 27. ing. Thus, in this latch device, as shown in FIG. 4A, an external force that opens the door 8 when the door 8 is closed (engagement body 3 is in the locked position), that is, an external force in the right arrow direction in FIG. Then, as in (d), it is difficult to apply a stress to rotate the engagement body 3 in the unlocking direction as compared with the conventional structure.

  In other words, in this structure, when an excessive external force is applied to the door 8 in the door opening direction at the engagement position of the engagement body 3 shown in FIG. In the case of a latch device that can be rotated so as to retreat from above the portion 22, that is, can be switched to the unlocking position, that is, a so-called unreasonable latch device, the contact surface of the claw portion 32 with the striker side claw 9 a and / or the claw portion 32 It is possible to cope with this by setting a gradient in a direction in which the striker side claw 9a easily comes off according to the degree of unreasonable removal.

  The present invention is not limited to the above-described embodiments, and various modifications can be made 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 is provided with a shaft portion instead of the shaft hole 24a, and the engaging body 3 is provided with a shaft hole instead of the shaft portion 35. Then, the engaging body 3 is pivotally supported with respect to the sliding body 2 through the fitting of the shaft portion and the shaft hole, and both the sliding body 2 and the engaging body 3 are provided with shaft holes. A configuration may be adopted in which the sliding body 2 is pivotally supported via a shaft inserted through the shaft holes.

The latch apparatus of this invention form is shown by the latching position of an engaging body, (a) is a front view, (b) is a top view, (c) is a side view, (d) is a rear view. (A) is a schematic perspective view which shows the latch apparatus of FIG. 1 with a main body side attachment frame, (b) is a schematic perspective view in the state which switched the said engaging body to the latch release position. It is a schematic exploded view which shows the relationship between the members of the said latch apparatus. The normal operation of the latch device is shown in a cross-sectional view along the line A-A in FIG. 1, (a) is a diagram in a state in which the engaging body is switched to the locking position, and (b) is the unlocking of the engaging body. (C) is a figure in the state which switched the said engaging body to the latch release position, (d) is a figure in the state which pulled out by the striker receiving the external force of the extraction direction. The housing of the said latch apparatus is shown separately, (a) is a side view, (b) is a front view, (c) is (a) BB sectional drawing, (d) is (b) CC sectional view. It is. 1A shows a single sliding body of the latch device, FIG. 3A is a top view, FIG. 3B is a side view, FIG. 3C is a bottom view, FIG. 3D is a rear view, and FIG. FIG. The engaging body single item of the said latch apparatus is shown, (a) is a top view, (b) is a rear view, (c) is a side view, (d) is a front view, (e) is a bottom view. (A), (b) It is an operation | movement figure which shows the conventional latch apparatus in the latch release position and a latching position.

Explanation of symbols

1 ... Housing (11a is a guide groove, 13 is a bottom wall, 16 is an overhang part, 18 is a support shaft)
2 ... Sliding body (20 is a main body, 22 is an abutting part, 23 is a frame part, 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 5 ... Pin member (5a is an intermediate part, 5b is a side part, and 5c is a tip)
7 ... Main body of equipment (7a is a mounting frame)
8 ... Door (9 is a striker which is a member to be engaged / disengaged)
21 ... rear extension part (25 is an upper part, 26 is a cylinder part)
27 ... Cam groove (27c is a locking groove)
35 ... Shaft

Claims (3)

A housing, a sliding body that has an abutting portion and a cam groove that come into contact with the mounted member, and is arranged so as to be able to advance and retreat with respect to the housing, and a spring that biases the sliding body in a direction in which the sliding body projects from the housing A locking position that is rotatably supported with respect to the member and the sliding body, and that projects the tip-side claw portion onto the abutting portion so that the engaged / disengaged member can be engaged, and retreats from the abutting portion And a pin member that traces the cam groove, and when the sliding body is pressed and moved against the biasing force of the spring member, In the latch device that is held via the cam groove and the pin member, and the engaging body is switched from the unlocking position to the locking position,
The engaging body has a claw part and a projecting part that forms a pivotal part that maintains a predetermined gap with the claw part and projects in the same direction as the claw part and rotatably supports the sliding body. The latch device is characterized in that the abutting portion is positioned between the claw portion and the protruding portion in a state of being supported by the sliding body and disposed at the locking position. A housing, a sliding body that has an abutting portion and a cam groove that come into contact with the mounted member, and is arranged so as to be able to advance and retreat with respect to the housing, and a spring that biases the sliding body in a direction in which the sliding body projects from the housing A locking position that is rotatably supported with respect to the member and the sliding body, and that projects the tip-side claw portion onto the abutting portion so that the engaged / disengaged member can be engaged, and retreats from the abutting portion And a pin member that traces the cam groove, and when the sliding body is pressed and moved against the biasing force of the spring member, In the latch device that is held via the cam groove and the pin member, and the engaging body is switched from the unlocking position to the locking position,
The sliding body includes at least a part between the abutting portion disposed on the entrance / exit side of the housing, the cam groove disposed on the back side of the housing, and the abutting portion and the cam groove. A latch device comprising: a pivot portion provided to be disposed and rotatably supporting the engaging body. In Claim 1 or 2, the slide body has a substantially reverse concave main body, and a rear extension part that forms the cam groove in a narrowed portion protruding rearward of the main body, The front end surface of the main body having a reverse concave shape is the abutting portion, and a pivot hole or a shaft portion is formed on both side surfaces,
The engaging body includes a front plate portion provided with the claw portion, a rear piece portion protruding rearward from the front plate portion, and a convex portion provided on a side surface of the rear piece portion, A latch that is switched from the locking position to the locking release position by riding on a protruding portion provided in the housing while the convex portion moves to the narrowed portion of the rear extension. apparatus.

Images