JP2018104907A - Push latch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a push latch which acts suitably even if a gap between a door and an opening portion is narrow.SOLUTION: A push latch has a hook member 11 having a main rotation axis 20, a connection member 30 which is connected to the hook member 11 at a position that is away from the main rotation axis 20, a pressed part 16 which is located in the range which is from the main rotation axis 20 to a connection position in a straight line direction that passes a connection position between the connection member 30 and the hook member 11, and the main rotation axis 20, a cylindrical engaging portion 37 which is provided in the connection member 30 at a position that is different from the connection position between the connection member 30 and the hook member 11, a box member 45 in which a heart cam groove 60 to insert the engaging portion 37 is formed and a bearing portion to support the main rotation axis 20 is formed, a first pushing member 85 which is connected to the hook member 11 and the box member 45 and has pushing force in the rotation direction of the main rotation axis 20, and a second pushing member 42 which is connected to the hook member 11 and the connection member 30 and has pushing force to make the engaging portion 37 move so as to insert the engaging portion 37 in the heart cam groove 60.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a push latch.

Conventionally, a heart cam type push latch is known as a latch for preventing the door that closes the opening from opening unintentionally.
For example, the latch described in Patent Document 1 accommodates a sliding body pressed by a striker, a heart cam formed on the sliding body, a locking pin formed with a right-angle bent portion inserted into the heart cam, and a sliding body. And a fixed cylinder to which the locking pin is connected.
The latch disclosed in Patent Document 1 can switch between a holding state in which the sliding body holds the striker and a released state in which the sliding body releases the striker by an operation in which the sliding body is pushed by the striker.

No. 04-012957

  In a state where the latch described in Patent Document 1 is attached to the opening and the striker is attached to the door, an operation of further pushing the door in the closed state is required to operate the latch and switch from the holding state to the open state. Thus, a gap for allowing the striker to move is required between the opening and the door. However, in a fixture designed so that the gap between the door and the opening is small, the gap for allowing the movement of the striker is too small to apply the conventional push latch.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a push latch that operates favorably even when the gap between the door and the opening is small.

  One aspect of the present invention is characterized in that the main member is configured to be relatively rotatable with respect to the flange member with a flange member having a main rotation shaft and an axis parallel to the central axis of the main rotation shaft as a rotation center. A connecting member connected to the flange member at a position away from the moving shaft, and the connecting position from the main rotating shaft in a linear direction passing through the connecting position of the connecting member and the flange member and the main rotating shaft. The pressed portion that is located in the range up to and can contact the member for moving the flange member around the main rotation shaft as the rotation center is different from the connection position of the connection member and the flange member A cylindrical engagement portion provided on the connecting member so as to form a convex shape in a direction parallel to the main rotation shaft at a position, and a heart cam groove into which the engagement portion is inserted are formed. A box member formed with a bearing portion for supporting the main rotation shaft, and the flange member A first urging member connected to the box member and having an urging force in the rotation direction of the main rotation shaft, connected to the flange member and the connecting member, and the engaging portion is inserted into the heart cam groove. And a second urging member having a urging force for moving the engaging portion.

  The flange member has a columnar connection shaft that defines a rotation center of the connection member with respect to the flange member, and a plane portion that is orthogonal to the central axis of the connection shaft and surrounds the periphery of the connection shaft. Also good. The connection member includes a substantially flat connection plate having a linear longitudinal axis, and a connection hole into which the through shaft is formed so as to be centered on the longitudinal axis and the connection shaft is inserted. You may have a hole and the protruding item | line part which extends in the direction orthogonal to the said longitudinal axis so that the protrusion shape which protruded toward the said plane part from the said connection plate might be in line contact with the said plane part.

  The box member may have a guide groove that extends so as to form a part of an arc centered on the center of the bearing portion and is formed at a position away from the bearing portion. The flange member may have a protrusion that is inserted into the guide groove.

  The protrusion may be provided on the connecting shaft.

  The second urging member may comprise a coil spring having one end in contact with the connecting shaft and the other end in contact with the connecting member and wound around a central axis of the connecting shaft.

  ADVANTAGE OF THE INVENTION According to this invention, the push latch which operate | moves suitably can be provided even if the clearance gap between a door and an opening part is small.

It is the whole figure of the state where the latch lock provided with the push latch of one embodiment of the present invention was attached to the fixture. It is a perspective view of a push latch. It is a top view which shows the inside of a push latch. It is sectional drawing which shows the box member of a push latch in the cross section in the IV-IV line of FIG. It is a top view which shows the principal part of a push latch. It is a side view which shows the principal part of a push latch. It is a top view which shows the inside of the box member of a push latch. It is a figure for demonstrating the effect | action of a push latch.

  An embodiment of the present invention will be described by exemplifying a latch lock 1 having a push latch 10 of the present embodiment. FIG. 1 is an overall view of a state in which a latch lock having a push latch of the present embodiment is attached to a fixture. FIG. 2 is a perspective view of the push latch. FIG. 3 is a plan view showing the inside of the push latch. 4 is a cross-sectional view of the push latch box member taken along line IV-IV in FIG. FIG. 5 is a plan view showing a main part of the push latch. FIG. 6 is a side view showing the main part of the push latch. FIG. 7 is a plan view showing the inside of the box member of the push latch.

As shown in FIGS. 1 and 2, the latch lock 1 of the present embodiment is a lock that connects the opening 101 and the door 102 in order to prevent the door 102 that closes the opening 101 of the fixture 100 from opening unintentionally. Device.
The shape of the fixture 100 is not particularly limited. As an example, the fixture 100 illustrated in FIG. 1 includes a door 102, an inner case 103, an outer case 104, and a frame portion 105. In the present embodiment, a fixing portion 106 for fixing the push latch 10 of the latch lock is provided on the frame portion 105. Further, the inner case 103 and the outer case 104 have a notch that becomes a passage of the striker 2 of the latch lock 1.

  The latch lock 1 shown in FIG. 2 includes a striker 2 that is fixed to the back surface of the door 102 (see FIG. 1), and a push latch 10 that is fixed to the fixing portion 106 of the frame portion 105.

  The striker 2 includes a pedestal portion 3 that contacts the back surface of the door 102, a protruding portion 4 that protrudes from the pedestal portion 3, and a through-hole portion 5 that is formed in the protruding portion 4. The striker 2 is made of metal, hard resin, or the like.

  As shown in FIGS. 2 and 3, the push latch 10 includes a flange member 11, a connecting member 30, a torsion coil spring 85 (first urging member), and a compression coil spring 42 (second urging member, see FIG. 6). And a box member 45.

  As shown in FIGS. 5 and 6, the eaves member 11 has a main rotating shaft 20 and a connecting shaft 25 and has a substantially flat plate shape having a predetermined plate thickness. The material of the collar member 11 will not be specifically limited if it is hard. For example, the collar member 11 is made of a metal such as stainless steel. The flange member 11 includes a claw portion 12 that can be inserted into the through hole portion 5 of the striker 2, a first through hole 13 for fixing the main rotating shaft 20 to the flange member 11, and a connecting shaft 25 to the flange member 11. And a second through hole 14 for fixing. The eaves member 11 has a flat surface portion 15 in contact with a ridge portion 35 described later around the second through hole 14. The flat surface portion 15 is a flat surface that is orthogonal to the central axis of the connecting shaft 25 fixed to the second through hole 14.

  Furthermore, the eaves member 11 has a protruding portion 4 of the striker 2 in the range between the first through hole 13 and the second through hole 14 in the linear direction connecting the first through hole 13 and the second through hole 14. It has the pressed part 16 which can contact. The pressed portion 16 is a portion that is pressed by the striker 2 in order to move the flange member 11 about the main rotation shaft 20 as a rotation center. The pressed part 16 is arranged at a position away from the claw part 12 to such an extent that the protruding part 4 of the striker 2 can enter between the claw part 12 and the pressed part 16. The pressed portion 16 and the claw portion 12 constitute a recess portion 17 in which the protruding portion 4 of the striker 2 is accommodated.

  The main rotating shaft 20 is a substantially columnar member fixed to the flange member 11 in a state of being inserted into the first through hole 13 of the flange member 11. The main rotating shaft 20 is a cylindrical press-fit portion 21 having the same diameter as the inner diameter of the first through-hole 13 and a cylindrical shape having an outer diameter larger than that of the press-fit portion 21 and is coaxial with the press-fit portion 21. A cylindrical positioning portion 22 connected to the portion 21, and cylindrical connecting portions 23 and 24 that constitute both ends of the main rotation shaft 20 and are coaxial with the press-fit portion 21 and the positioning portion 22.

  The connecting shaft 25 is a substantially columnar member that is fixed to the plate-like portion of the flange member 11 while being inserted into the second through hole 14 of the flange member 11. The connecting shaft 25 is disposed at a position away from the main rotation shaft 20 in a direction orthogonal to the central axis of the main rotation shaft 20. The central axis of the connecting shaft 25 is parallel to the central axis of the main rotating shaft 20. The connecting shaft 25 has a protruding shape that protrudes in the thickness direction of the flange member 11.

  The connecting shaft 25 is a columnar insertion portion 26 having a diameter substantially the same as the inner diameter of the second through hole 14 and a columnar shape having an outer diameter larger than that of the insertion portion 26. And a disc-shaped spring locking portion 28 formed on the opposite side of the main body portion 27 to the side connected to the insertion portion 26 and having a larger outer diameter than the main body portion 27. In this embodiment, the connecting shaft 25 is fixed to the flange member 11 by flat caulking.

  The connecting member 30 is connected to the flange member 11 via the connecting shaft 25. The connecting member 30 includes a connecting plate 31 having a predetermined plate thickness and extending linearly, a connecting hole portion 32 in which a through hole is formed, and a ridge 35 protruding from the connecting plate 31 toward the flange member 11. The cylindrical engaging portion 37 provided on the connecting plate 31 so as to form a convex shape in a direction parallel to the main rotation shaft 20 at a position different from the connecting hole portion 32, and the longitudinal direction of the connecting member 30 And a step portion 41 formed in the intermediate portion.

  The connecting plate 31 is connected to the connecting shaft 25 in a state where the connecting plate 31 is overlapped with the flange member 11 so that the plate thickness direction of the flange member 11 and the plate thickness direction of the connecting plate 31 coincide with each other. Both end portions of the connecting plate 31 in the longitudinal axis direction are semicircular when viewed from the thickness direction of the connecting plate 31. In the present embodiment, a stepped portion 41 is formed in the middle portion of the connecting plate 31 in the longitudinal axis direction.

The connection hole portion 32 is arranged at one end portion at both end portions in the longitudinal axis direction of the connection plate 31, and the first through hole 33 into which the connection shaft 25 is inserted, and at both end portions in the longitudinal axis direction of the connection plate 31. It has the 2nd through-hole 34 distribute | arranged to the edge part on the opposite side to the side by which the 1 through-hole 33 was distribute | arranged.
The central axis of the first through hole 33 extends in the thickness direction of the connecting plate 31. The opening shape of the first through hole 33 is circular when viewed from the direction along the central axis of the first through hole 33. The inner diameter of the first through hole 33 is a constant size in the thickness direction of the connecting plate 31. The inner diameter of the first through hole 33 is larger than the outer diameter of the main body portion of the connecting shaft 25 and smaller than the outer diameter of the spring locking portion 28 of the connecting shaft 25. In a state in which the connecting shaft 25 is inserted into the first through hole 33, the connecting plate 31 is rotatable with respect to the connecting shaft 25 about the central axis of the connecting shaft 25 as a rotation center.
The central axis of the second through hole 34 extends in the thickness direction of the connecting plate 31. The opening shape, internal shape, and dimensions of the second through hole 34 may be appropriately selected according to the shape of the engaging portion 37. In the present embodiment, the opening shape of the second through hole 34 is circular when viewed from the direction along the central axis of the second through hole 34.

  The ridge 35 is on the longitudinal axis of the connecting plate 31 when viewed from the thickness direction of the connecting plate 31. When viewed along the width direction of the connecting shaft 25, the shape of the ridge portion 35 is a curved shape that is convex toward the flange member 11. The protruding portion 35 has a top portion 36 that extends in a direction (width direction of the connecting plate 31) orthogonal to the longitudinal axis of the connecting plate 31 at a position closest to the flange member 11 among the protruding portions 35. The top portion 36 is located in a plane parallel to the surface of the connecting plate 31. The top portion 36 can make line contact with the flat surface portion 15 of the flange member 11. The protruding portion 35 functions as a fulcrum when the connecting plate 31 is swung with respect to the flange member 11.

  The engaging portion 37 is fixed to the second through hole 34 of the connecting plate 31. The engaging portion 37 has a convex shape in a direction parallel to the main rotation shaft 20. The direction in which the engaging portion 37 protrudes from the connecting plate 31 is opposite to the direction in which the protruding strip portion protrudes from the connecting plate 31. The engaging portion 37 is a cylindrical insertion portion 38 having substantially the same diameter as the inner diameter of the second through-hole 34, and a cylindrical shape having an outer diameter larger than that of the insertion portion 38 and coaxial with the insertion portion 38. 38, a substantially disc-shaped positioning portion 39 connected to 38, and a pin main body portion 40 having a cylindrical shape with an outer diameter smaller than that of the positioning portion 39 and coaxial with the positioning portion 39 and connected to the positioning portion 39. In the present embodiment, the engaging portion 37 is fixed to the connecting plate 31 by flat caulking.

  The step portion 41 is bent so that the portion closer to the second through hole than the step portion 41 is closer to the flange member 11 in the thickness direction of the connecting plate 31 with respect to the portion closer to the first through hole than the step portion 41. It is the part which makes the shape. In the connecting plate 31, the part closer to the first through hole than the step part 41 and the part closer to the second through hole than the step part 41 are parallel to each other. When viewed from the thickness direction of the connecting plate 31, the stepped portion 41 extends in the width direction orthogonal to the longitudinal axis of the connecting plate 31.

  As shown in FIG. 6, the compression coil spring 42 is a spring that is coaxial with the connecting shaft 25 so that one end is in contact with the spring locking portion 28 and the other end is in contact with the connecting plate 31. The compression coil spring 42 has a biasing force that attempts to separate the spring locking portion 28 and the connecting plate 31 from each other with a gap between the strands. The compression coil spring 42 is expanded and contracted by the swinging of the connecting plate 31 with the ridge 35 as a fulcrum.

  As shown in FIG. 2, the box member 45 has a substantially rectangular parallelepiped shape having an opening for inserting the striker 2. The box member 45 has a container portion 46 and a lid portion 83. In the following, for the sake of convenience, “the left side of the box member 45” and “the right side of the box member 45” are defined based on the vertical direction of the paper surface in FIG. Further, “the rear of the box member 45” and “the front of the box member 45” are defined with reference to the horizontal direction of the paper surface in FIG. Furthermore, in the direction perpendicular to the paper surface in FIG. 3, “above the box member 45” is defined with reference to the direction toward the near side, and “below the box member 45” is defined with respect to the direction toward the back side.

  As shown in FIGS. 3 and 4, the container portion 46 has a rectangular plate-like bottom portion 47 and an outer wall portion 79 surrounding the bottom portion 47.

  The bottom portion 47 is inserted with a flat surface portion 48 constituting the outer surface of the box member 45, a back surface portion 49 constituting the inner surface of the box member 45 on the side opposite to the surface portion 48 in the plate thickness direction of the bottom portion 47, and the striker 2. And an opening 50 for the purpose.

  As shown in FIG. 7, the back surface portion 49 of the bottom portion 47 has a bearing portion 51, a guide groove 54, and a heart cam groove 60.

  The bearing portion 51 has a cylindrical shape protruding from the back surface portion 49 of the bottom portion 47 along the thickness direction of the bottom portion 47. The central axis of the bearing portion 51 extends in the thickness direction of the bottom portion 47. The inner surface of the bearing portion 51 has a first sliding surface 52 slightly larger than the outer diameter of the connecting portions 23 and 24 (see FIG. 6) of the main rotating shaft 20 and smaller than the outer diameter of the positioning portion, and the main rotating shaft 20. And a second sliding surface 53 which is larger than the outer diameter of the connecting portions 23 and 24 and slightly larger than the outer diameter of the positioning portion. The first sliding surface 52 and the second sliding surface 53 have a cylindrical inner surface shape that is coaxial with each other. The bearing portion 51 is connected to the connection portion 23 of the main rotation shaft 20 so that the main rotation shaft 20 can rotate relative to the bearing portion 51 with the central axis of the bearing portion 51 as the rotation center.

The guide groove 54 extends at a position away from the bearing portion 51 so as to form a part of an arc centered on the central axis of the bearing portion 51. A part of the connecting shaft 25 is inserted into the guide groove 54. The inner surface of the guide groove 54 has an arc shape in the guide groove 54 and a first arc-shaped surface 55 and a second arc-shaped surface 56 that are spaced apart from each other with a gap larger than the outer diameter of the spring locking portion 28 of the connecting shaft 25. It has the 1st end surface 57 and the 2nd end surface 58 which are located in the both ends of the longitudinal axis direction extended.
The first arc-shaped surface 55 and the second arc-shaped surface 56 restrict the operation of the connecting shaft 25 so that the connecting shaft 25 moves in the guide groove 54 in the longitudinal axis direction of the guide groove 54. Further, the first end surface 57 and the second end surface 58 are arranged at positions where the connecting shaft 25 does not contact. For this reason, the guide groove 54 restricts the operation of the connecting shaft 25 so that the connecting shaft 25 moves along the longitudinal axis direction of the guide groove 54, but the movable range of the connecting shaft 25 in the longitudinal axis direction of the guide groove 54. Do not regulate.

The heart cam groove 60 includes an outer cam surface 62 formed of an inner peripheral surface of a circumferential outer cam wall portion 61 projecting from the back surface portion 49 of the bottom portion 47 along the thickness direction of the bottom portion 47, and an inner side of the outer cam wall portion 61. The inner cam surface 64 formed by the outer peripheral surface of the inner cam wall portion 63 protruding from the back surface portion 49 of the bottom portion 47 along the thickness direction of the bottom portion 47, and the outer cam wall portion 61 and the inner cam wall portion 63 are connected. And a bottom cam surface 65 formed on the back surface portion 49 of the bottom portion 47.
The heart cam groove 60 has a total of four grooves, a first groove 66, a second groove 67, a third groove 68, and a fourth groove 69. The first groove 66, the second groove 67, the third groove 68, and the fourth groove 69 are connected in this order. Further, the fourth groove 69 is connected to the first groove 66.

The first groove 66 forms a portion from the front end portion of the heart cam groove 60 to the left rear end portion. One end portion (front end portion) of the first groove 66 continues to the protruding position 70. The protruding position 70 is disposed at a position closest to the bearing portion 51 in the heart cam groove 60. The first groove 66 extends linearly from the protruding position 70 to the rear end side so as to be separated from the bearing portion 51. The other end (rear end) of the first groove 66 is continuous with the second groove 67. Further, a first drop step constituting a boundary between the first groove 66 and the second groove 67 is formed on the bottom surface of the first groove 66 (the portion corresponding to the first groove 66 of the bottom cam surface 65 of the heart cam groove 60). 71 is formed. In the vertical direction of the box member 45, in the vicinity of the first drop step 71, a second groove 67 is located below the first groove 66.
Thus, the first groove 66 forms a part of the heart cam groove 60 that extends from the protruding position 70 to the second groove 67 through the first drop step 71.
A portion of the bottom surface of the first groove 66 from the protruding position 70 to the first falling step 71 is an uphill from the protruding position 70 toward the first falling step 71.

The second groove 67 forms a portion from the left rear end portion to the center portion of the heart cam groove 60. The second groove 67 is connected to the first groove 66 through the first drop step 71 near the end (rear end) farthest from the bearing portion 51 in the direction in which the first groove 66 extends. The second groove 67 extends slightly toward the rear end side from the first drop step 71. One end (left rear end) of the second groove 67 continues to the first intermediate position 72. The second groove 67 extends linearly from the connecting portion (first drop step 71) with the first groove 66 toward the inner peripheral side of the heart cam groove 60. The other end portion (central portion) of the second groove 67 continues to the immersion position 74. Further, a second drop step that forms a boundary between the second groove 67 and the third groove 68 is formed on the bottom surface of the second groove 67 (the portion corresponding to the second groove 67 of the bottom cam surface 65 of the heart cam groove 60). 73 is formed. A third groove 68 is located below the second groove 67 in the vicinity of the second drop step 73 in the vertical direction of the box member 45.
As described above, the second groove 67 forms a part of the heart cam groove 60 from the first intermediate position 72 to the immersion position 74 via the second drop step 73.

  The immersion position 74 is on the front end side with respect to the first intermediate position 72. The inner cam wall portion 63 has a holding wall portion 75 in a recessed position 74 that has a shape surrounding a part of the outer peripheral surface of the engagement so as to be able to contact the outer peripheral surface of the engagement portion 37. The holding wall portion 75 is disposed at an end on the opposite side of the connecting portion (first drop step 71) between the second groove 67 and the first groove 66 in the direction in which the second groove 67 extends.

The third groove 68 forms a portion from the center portion of the heart cam groove 60 to the right rear end portion. One end portion (central portion) of the third groove 68 is connected to the second groove 67 via the second drop step 73 in the vicinity of the end on the immersion position 74 side in the extending direction of the second groove 67. In addition, one end portion (central portion) of the third groove 68 is connected to the immersion position 74. The third groove 68 extends linearly from the connecting portion with the second groove 67 (second drop step 73) to the outer peripheral side of the heart cam groove 60. The other end (right rear end) of the third groove 68 is continuous with the second intermediate position 76. Further, a third drop step forming a boundary between the third groove 68 and the fourth groove 69 is formed on the bottom surface of the third groove 68 (the portion corresponding to the third groove 68 of the bottom cam surface 65 of the heart cam groove 60). 77 is formed. A fourth groove 69 is located below the third groove 68 in the vicinity of the third drop step 77 in the vertical direction of the box member 45.
As described above, the third groove 68 forms a part of the heart cam groove 60 from the immersion position 74 to the second intermediate position 76 through the third drop step 77.

The fourth groove 69 forms a portion from the right rear end portion to the front end portion of the heart cam groove 60. The fourth groove 69 is the end farthest from the bearing portion 51 in the vicinity of the end opposite to the connecting portion (second drop step 73) between the third groove 68 and the second groove 67 in the direction in which the third groove 68 extends. In the vicinity of the rear end), the third groove 68 is continued through a third drop step 77. The fourth groove 69 extends slightly to the rear end side from the third drop step 77. One end portion (right rear end portion) of the fourth groove 69 continues to the second intermediate position 76. The other end (front end) of the fourth groove 69 continues to the protruding position 70. Further, on the bottom surface of the fourth groove 69 (the portion corresponding to the fourth groove 69 in the bottom cam surface 65 of the heart cam groove 60), a fourth drop step forming the boundary between the fourth groove 69 and the first groove 66 is provided. 78 is formed. In the vertical direction of the box member 45, the first groove 66 is located below the fourth groove 69 in the vicinity of the fourth drop step 78. The fourth groove 69 is connected to the first groove 66 in the vicinity of the protruding position 70 (for example, a position slightly behind the protruding position 70) via the fourth drop step 78.
As described above, the fourth groove 69 forms a portion of the heart cam groove 60 that extends from the second intermediate position 76 to the protruding position 70 via the fourth drop step 78.

  As shown in FIG. 3, the outer wall portion 79 includes a screw hole 80 for fixing the lid portion 83 to the container portion 46 and a screw for fixing the box member 45 to the fixture 100 to which the latch lock 1 is attached. It has the hole 81 and the collar contact part 82 distribute | arranged inside the container part 46 so that contact with the nail | claw part 12 of the collar member 11 is possible. In a state where the claw portion 12 is in contact with the heel contact portion 82, the claw portion 12 is located outside the space defined by the opening 50 and the outer wall portion 79.

  As shown in FIGS. 2 and 4, the lid 83 is fixed to the outer wall 79 of the container 46 by screws. The lid portion 83 has a bearing portion 84 into which the connection portion 24 (see FIG. 3) of the main rotating shaft 20 can be inserted. It is coaxial with the bearing portion 84 formed on the lid portion 83 and the bearing portion 51 (see FIG. 7) formed on the container portion 46.

  As shown in FIG. 3, the torsion coil spring 85 has one end locked to the flange member 11, an intermediate portion wound around the outer peripheral surface of the bearing portion 51, and the other end to the inner surface of the outer wall portion 79 of the container portion 46. It is the spring latched by. The torsion coil spring 85 has an urging force that attempts to rotate the eaves member 11 toward the front end side of the container portion 46 with the central axis of the main rotation shaft 20 as the rotation center.

  The operation of the push latch 10 of this embodiment will be described. FIG. 8 is a diagram for explaining the operation of the push latch.

  As shown in FIG. 1, the push latch 10 of the present embodiment is fixed near the opening 101 of the fixture 100 by screwing or the like. Moreover, the striker 2 is fixed to the back surface of the door 102 that closes the opening 101 of the fixture 100 by screwing or the like corresponding to the position of the push latch 10 of the present embodiment.

  When the opened door 102 is closed, the striker 2 comes into contact with the pressed portion 16 (see FIG. 3) of the flange member 11 of the push latch 10. When the striker 2 presses the pressed portion 16 from the front end to the rear end of the box member 45 of the push latch 10, the flange member 11 rotates about the central axis of the main rotation shaft 20 as the rotation center.

  When the eaves member 11 is moved by the striker 2, as shown in FIG. 5, the main rotating shaft 20 becomes the fulcrum X, the point in contact with the striker 2 in the pressed portion 16 becomes the force point Y, and the connecting shaft 25 acts as the point of action. Z. As shown in FIG. 5, since the distance D1 from the fulcrum to the action point is longer than the distance D2 from the fulcrum to the force point, the force point (pressed portion 16) rotates around the fulcrum (main rotation shaft 20) as the rotation center. The action point (the connecting shaft 25) rotates about the fulcrum (the main rotation shaft 20) as the rotation center rather than the amount of movement (the length along the arc centered on the central axis of the main rotation shaft 20). The amount (the length along the arc centered on the central axis of the main rotation shaft 20) is longer.

  When the connecting plate 31 is moved by the rotation of the flange member 11, the engaging portion 37 fixed to the connecting plate 31 moves along the heart cam groove 60. At this time, the compression coil spring 42 urges the connecting plate 31 so that the engaging portion 37 continues to contact the bottom cam surface 65 of the heart cam groove 60. Therefore, the engaging portion 37 moves in one direction in the order of the first groove 66, the second groove 67, the third groove 68, and the fourth groove 69 in the heart cam groove 60.

  The force that moves the engaging portion 37 from the first groove 66 to the second groove 67 is due to the force with which the user of the fixture 100 closes the door 102. The force for moving the engaging portion 37 from the second groove 67 to the immersion position 74 is due to the biasing force of the torsion coil spring 85.

  In a state where the engaging portion 37 is at the immersion position 74, the engaging portion 37 is in contact with the holding wall portion 75 by the biasing force of the torsion coil spring 85. Further, the claw portion 12 of the collar member 11 is inserted into the through hole of the striker 2 and is held at a position crossing the opening of the box member 45. Thereby, the latch lock 1 is in a restrained state in which the striker 2 is not detached from the push latch 10.

  As shown in FIG. 8, the user holds the door 102 (see FIG. 1) from the front end to the rear end of the box member 45 in a state where the latch lock 1 is in a restrained state (shown by a solid line in FIG. 8). When pressed, the flange member 11 rotates against the urging force of the torsion coil spring 85. In the present embodiment, the flange member 11 is connected to the connecting plate 31 and the rear end from the front end of the box member 45 to a distance L1 from which the striker 2 moves the pressed portion 16 from the front end to the rear end of the box member 45. The distance L2 for moving the engaging portion 37 is longer. When the connecting plate 31 is moved by the rotation of the flange member 11, the engaging portion 37 is separated from the holding wall portion 75, leaves the immersion position 74, and moves to the fourth groove 69 along the third groove 68 ( FIG. 8 shows a two-dot chain line). When the user releases the pressing of the door 102 after the engaging portion 37 enters the fourth groove 69, the eaves member 11 moves to the front end side by the urging force of the torsion coil spring 85. As a result, the striker 2 is unconstrained by the claw portion 12 of the eaves member 11 and is opened, and the pressed portion 16 pushes the striker 2 from the rear end side to the front end side, thereby opening the door 102.

  As described above, according to the push latch 10 of the present embodiment, the amount of rotation of the eaves member 11 required to move the engaging portion 37 from the immersion position 74 to the fourth groove 69 can be small. That is, the amount of movement of the striker 2 required to shift the push latch 10 from the restrained state to the open state is small. Thus, according to the latch lock 1 provided with the push latch 10 of the present embodiment, the push latch even when the gap between the door 102 and the opening is small when the striker 2 is restrained by the push latch 10. 10 can be suitably operated.

  Further, in the present embodiment, since the connecting plate 31 swings around the protruding portion 35 as a fulcrum according to the displacement of the height position of the engaging portion 37, the connecting plate 31 due to the displacement of the height position of the engaging portion 37. No deformation occurs. For this reason, in the process in which the engaging portion 37 moves along the heart cam groove 60, the connecting plate 31 is hardly twisted. For this reason, the push latch 10 of the present embodiment is less likely to cause fatigue failure or distortion of the connecting plate 31 and is less likely to fail.

  In addition, since the ridge 35 is in line contact with the flange member 11, the swinging motion of the connecting plate 31 with respect to the flange member 11 can be stabilized.

  Further, since the guide groove 54 is formed in the box member 45, it is possible to prevent the flange member 11 from being twisted when the flange member 11 is moved by the striker 2 and to move the flange member 11 smoothly.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

DESCRIPTION OF SYMBOLS 1 Latch lock 2 Striker 3 Base part 4 Protrusion part 5 Through-hole part 10 Push latch 11 Claw member 12 Claw part 13 First through-hole 14 Second through-hole 15 Planar part 16 Pressed part 17 Depression part 20 Main rotating shaft 21 Press-fit portion 22 Positioning portion 23 Connection portion 24 Connection portion 25 Connection shaft 26 Insertion portion 27 Main body portion 28 Locking portion 30 Connection member 31 Connection plate 32 Connection hole portion 33 First through hole 34 Second through hole 35 Projection portion 36 Top portion 37 engaging portion 38 inserting portion 39 positioning portion 40 pin body portion 41 step portion 42 compression coil spring 45 box member 46 container portion 47 bottom portion 48 surface portion 49 back surface portion 50 opening portion 51 bearing portion 52 first sliding surface 53 second Sliding surface 54 Guide groove 55 First arc-shaped surface 56 Second arc-shaped surface 57 First end surface 58 Second end surface 60 Heart cam groove 61 Outer cam wall portion 62 Outer cam surface 63 Inner cam wall portion 64 Inner cam surface 65 Bottom cam surface 66 First groove 67 Second groove 68 Third groove 69 Fourth groove 70 Projection position 71 First drop step 72 First intermediate position 73 Second drop step 74 Immersion position 75 Holding wall portion 76 Second intermediate position 77 Third falling step 78 Fourth falling step 79 Outer wall portion 80 Screw hole 81 Screw hole 82 鉤 contact portion 83 Lid portion 84 Bearing portion 85 Torsion coil spring 100 Fixture 101 Opening portion 102 Door

Claims (5)

A gutter member having a main pivot axis;
A connecting member connected to the flange member at a position away from the main rotation shaft so as to be rotatable relative to the flange member about an axis parallel to the central axis of the main rotation shaft; ,
It is located in the range from the main rotation axis to the connection position in the linear direction passing through the connection position of the connection member and the flange member and the main rotation axis, and the main rotation axis is the rotation center. A pressed portion that can contact a member for moving the flange member;
A columnar engagement portion provided on the connection member so as to form a convex shape in a direction parallel to the main rotation shaft at a position different from the connection position of the connection member and the flange member;
A box member in which a heart cam groove into which the engaging portion is inserted is formed and a bearing portion that supports the main rotating shaft is formed;
A first biasing member connected to the flange member and the box member and having a biasing force in a rotation direction of the main rotation shaft;
A second urging member connected to the flange member and the connecting member and having a urging force to move the engagement portion so that the engagement portion is inserted into the heart cam groove;
A push latch characterized by comprising: The flange member is
A columnar connecting shaft that defines the center of rotation of the connecting member relative to the flange member;
A plane portion perpendicular to the central axis of the connecting shaft and surrounding the connecting shaft;
The connecting member is
A substantially flat connecting plate having a linear longitudinal axis;
A connection hole portion in which a through hole is formed so as to penetrate the connection plate so that the center is located on the longitudinal axis, and the connection shaft is inserted;
A projecting ridge that extends in a direction perpendicular to the longitudinal axis so as to form a protruding shape projecting from the connecting plate toward the planar portion, and in line contact with the planar portion;
The push latch according to claim 1. The box member has a guide groove that extends to form a part of an arc centered on the center of the bearing portion and is formed at a position away from the bearing portion,
The push latch according to claim 2, wherein the flange member has a protrusion inserted into the guide groove. The push latch according to claim 3, wherein the protrusion is provided on the connecting shaft. 3. The push latch according to claim 2, wherein the second urging member includes a coil spring having one end in contact with the connecting shaft and the other end in contact with the connecting member and wound around a central axis of the connecting shaft.

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