JP5089645B2 - Latch device - Google Patents

Description

  The present invention is attached to a second member (for example, a lid) corresponding to the latch body on the side of the first member (for example, a box-shaped base), and is inserted from the front insertion port of the latch body to be inside the latch body. The present invention relates to a latch device having a striker that is releasably locked by the.

  The latch device is sometimes referred to as a lock or a locking device, and the latch body that engages and disengages the striker has an operation button as illustrated in FIG. There is also a locking mechanism that does not have a button. Here, the latch device of FIG. 10 is disclosed in Patent Document 1, and a striker (engagement protrusion) 52 is attached to the front surface of the box-shaped base 50 in a protruding state, and the latch main body 53 is a lid 51. It is provided in the corresponding part. The striker 52 has a recess 52a formed by the presence of a large tip diameter portion. The latch main body 53 is an operation of pressing the intermediate portion of the hook member 55, a bracket 54 attached to the inner surface of the lid 51, a substantially U-shaped hook member 55 held in the bracket 54 so as to be expandable. Button 56. In the above structure, the striker 52 is elastically inserted into the inside of the hook member 55 from the opening 54a of the bracket 54 as in (a), and the latch main body 53 is in a state where the recesses 52a are elastically engaged with both ends of the hook member 55. It is locked to. When the operation button 56 is pushed as in (b), the hook member 55 is expanded and deformed at both end sides to release the engagement with the recess 52a.

  The latch device of FIG. 11 is disclosed in Patent Document 2, and is attached to the lid body 61 when the latch body 70 is attached to the base body 60 and the lid body 61 is rotated from the open position to the closed position. The pusher / push locking mechanism is configured to lock the striker 62 and release the locking by further pushing the lid 61. That is, the latch body 70 includes a case 71, a latch member 72, a spring member 75, a pin member 76, and a leaf spring 77. The latch member 72 has a heart-shaped cam groove 73 and an elastic locking portion 74, and is urged and moved in the case protruding direction by a spring member 75 with respect to the case 71. The pin member 76 has a distal end protruding into the cam groove 73 in a state where the base end is held on the bottom surface inside the case. The leaf spring 77 is attached to the case 71, and one end side presses the pin member 76 from the opening 71 a to ensure the pressure contact force of the pin member 76 against the cam groove 73. The cam groove 73 includes a guide groove 73a that extends from the lower side to the upper left side, a locking guide groove 73b and a release guide groove 73d that are located on the upper side of the guide groove 73a and are separated from each other. , A lower locking groove 73c between the guide grooves 73b and 73d and a return groove 73e extending downward from the guide groove 73d. The locking portion 74 has a claw portion 74a at the tip. When the latch member 72 is pushed by the striker 62, the locking portion 74 is pulled into the case 71 while being elastically displaced, and the claw portion 74 a prevents the claw portion 62 a of the striker 62 from coming off, and the tip of the pin member 76. Is locked in the locking groove 73c. When the latch member 72 is pushed again by the striker 62, the locking is released when the tip of the pin member 76 enters the return groove 73e from the guide groove 73d.

Japanese Patent Laid-Open No. 2001-73617 JP 2001-262915 A

  As described above, there are various types of conventional latch devices as locking mechanisms, but in any structure, the striker and the latch main body are associated with each other and attached. That is, for example, the striker is attached to the second member (the other of the lid and the base) with a predetermined accuracy corresponding to the latch body on the first member (one of the lid and the base). For example, this mounting accuracy increases as the apparatus becomes smaller, and it takes time and labor to adjust the position. Further, depending on the use mode, the striker may be displaced from the normal position due to thermal deformation of the mounted member with respect to the latch body, and the mounting position may have to be changed. As a countermeasure, the striker front insertion opening of the latch body is set to be relatively large so that the accuracy of the mounting position of the striker can be easily relaxed, but there are design limitations.

Therefore, the object of the present invention is to solve the above problems, greatly reduce the mounting position accuracy of a striker, etc., thereby improving the mounting operability and preventing malfunctions,
The purpose is to improve quality and expand applications.

In order to achieve the above object, the invention according to claim 1 is characterized in that the striker is attached to the second member and forms a window portion penetrating the upper and lower surfaces, and the base corresponding to the window portion. And a substantially cap-shaped case that forms a convex leaf spring portion on the inside, and the base end side of the striker is disposed between the leaf spring portion and the base. It stands upright so that the sliding position can be adjusted against the elastic force of the leaf spring part , and the tip side of the striker protrudes outward from the window part .

According to the above invention, the position accuracy of the striker can be adjusted even after the mounting, whereby it is bothered by the accuracy of the striker and the latch body and the malfunction can be solved. The above invention is preferably embodied as follows .

The striker corrects misalignment in one direction left and right or up and down forming the front insertion port of the latch body by adjusting the sliding position with respect to the base, and the misalignment in the other direction is corrected by opening the front insertion port. It is absorbed by setting the width dimension large (claim 2) .
The latch body includes a push-push locking mechanism that locks the striker by an initial pushing operation and unlocks the striker by a next pushing operation (Claim 3) .

  In the first aspect of the invention, for example, since the striker is attached to the second member via the base and then can be adjusted by sliding relative to the base, the attachment accuracy of the striker and the latch main body is improved compared to the conventional structure. Can be easily corrected when the position of the striker with respect to the latch body goes wrong due to long-term use. At the same time, in the present invention, since the striker is elastically held via the leaf spring portion, inadvertent sliding after the position adjustment can be prevented.

Further, in the present invention, since it is unitized by the striker, the base, and the case, it is easy to ensure the handling property, the mounting property, the sliding holding characteristic of the striker, and the like.

According to the invention of claim 2, as described in the form example, the striker ensures the right and left positional accuracy with respect to the latch body side front insertion port by sliding adjustment with respect to the base, and the vertical position accuracy is opened in the vertical direction of the front insertion port. Absorbed by the width dimension. On the other hand, the invention of claim 3 specifies that the latch body is formed of a push-push locking mechanism as an example of the locking mechanism. However, the present invention may be other than a push / push locking mechanism.

It is a schematic block diagram which shows the usage example of the latch apparatus of the invention form example. It is an operation | movement figure which shows the said latch apparatus in a latch release and a latching state. It is a disassembled block diagram which shows the latch main body side of the said latch apparatus. It is a figure which shows the said latch main body in a latching state. It is a disassembled block diagram which shows the striker assembly of the said latch apparatus. It is a figure which shows the detail of the said striker assembly. It is a figure which shows the base of the said striker assembly. It is a figure which shows the case of the said striker assembly. It is a figure which shows the said striker. It is a figure which shows the latch apparatus of patent document 1. FIG. It is a figure which shows the latch apparatus of patent document 2. FIG.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing an example of use of a latch device. 2A and 2B are operation views showing a cross section of the latch device, in which FIG. 2A shows the unlocked state, and FIG. 2B shows the locked state. FIG. 3 is an exploded configuration diagram of the latch body. 4A and 4B show the latch body in a locked state, where FIG. 4A is a top view, FIG. 4B is a side view, and FIG. 4C is a cross-sectional view. FIG. 5 is an exploded view showing the striker assembly. 6A and 6B show a striker assembly, where FIG. 6A is a top view, FIG. 6B is a front view, and FIG. 6C is a cross-sectional view taken along line AA of FIG. 7A and 7B show the base of the striker assembly, where FIG. 7A is a top view, FIG. 7B is a bottom view, and FIG. 7C is a cross-sectional view taken along line BB in FIG. 8A and 8B show a case of the striker assembly, where FIG. 8A is a top view, FIG. 8B is a sectional view taken along the line CC of FIG. 8A, and FIG. 8C is a sectional view taken along the line DD of FIG. 9A and 9B show a striker, where FIG. 9A is a front view and FIG. 9B is a cross-sectional view taken along line EE of FIG. In the following description, the structure and assembly will be described in detail before referring to use cases and operation.

(Structure) The latch device according to the embodiment includes a latch body 1 and a striker assembly 2. As illustrated in FIG. 1, the latch body 1 is attached to the box-shaped base 8, and the striker assembly 2 is latched. The striker 20 that is attached to the corresponding portion of the lid 9 corresponding to the main body 1 and that constitutes the striker assembly 2 is inserted from the front insertion port of the latch main body 1 and is releasably locked in the latch main body. The Note that the latch body 1 and the striker assembly 2 may be attached to the lid body 9 and the striker assembly 2 may be attached to the base body 8 in the same manner as in the arrangement of FIG.

(Latch body) The latch body 1 is configured such that, for example, when the lid body 9 is urged to rotate in the opening direction, the latch body 1 is latched in the closed position when the lid body 9 is pushed against the urging force in the closing direction. This is a push-push locking mechanism that is locked through the striker 20 of the solid 3 and that is unlocked when the lid 9 is further pushed in the same direction and the hand is released. As shown in FIG. 3, the structural members include a case 3 having an opening on the front side or the upper side, a latch member 4 with a cam groove 5 disposed in the case 3, and a latch claw 46 pivotally supported by the latch member 4. The spring member 6 urges the latch member 4 in a direction protruding from the case 3 and a substantially U-shaped pin member 7.

  Here, as shown in FIG. 3 and FIG. 4, the case 3 has a cylindrical shape whose inside is defined by front and rear walls 30, 31, both side walls 32, and a bottom wall 33, one end side, that is, a front opening. Further, the both side walls 32 have mounting portions 37, and the mounting portions 37 are applied to the corresponding mounting portions on the base 8 side as shown in FIG. The front wall 30 is latched with a restriction groove 30a that is located in the middle of the left and right to restrict the sliding range of the latch member 4 and a latch claw 46 that protrudes from both inner surfaces and is pivotally supported by the latch member 4. An overhanging portion 38 that can be rotated in the direction is provided. On the inner surface of the rear wall 31, a regulating vertical rib 39 protrudes corresponding to the pin member 7 together with a guide recess (not shown) extending in the vertical direction (see FIG. 2). Guide recesses 32a extending in the vertical direction are provided on the inner surfaces of the side walls 32 so as to face each other. On the other hand, in the bottom wall 33, a punching hole 34a penetrating on both sides of the front, a pin insertion hole 34b penetrating on both sides of the rear, and an elastic clamping piece defined by a small slit between the pin insertion holes And a pin receiving portion, a spring support shaft 35 protruding from the front inner surface, and the like. In this structure, the pin member 7 is pivotally supported via the clamping piece and the spring member 6 is held by the support shaft 35. That is, the spring member 6 is a coil spring, the lower side is supported by the support shaft 35, and the upper side is disposed in the corresponding small tube portion of the latch member 4. The pin member 7 is formed by a U-shaped intermediate portion 7a, U-shaped side portions 7b, and a distal end 7c that is bent inward at the free end side of each side portion.

  The latch member 4 is slidably disposed in the case 3, makes the striker 20 engageable via the latch claw 37 when pushed into the case 3, and a heart shape traced by the pin member 7. It is essential to have the cam groove 5. In this example, it consists of a substantially rectangular container-shaped front part 41 and a rear part 42 connected to the front part 41. As shown in FIG. 4, the front portion 41 is defined by opposed surfaces 43 b and 43 c having a long interior 43, both side surfaces (short opposed surfaces), and a narrow bottom surface 43 a. The inner surface 43 is an inclined surface in which the opposing surfaces 43b and 43c increase in distance toward the outside, and is easily in contact with the bottom surface 43a while being guided when a striker 20 described later enters. In addition, a predetermined large opening 45 is formed between the facing surface 43 c and the bottom surface 43 a, and a tip of a latch claw 46 to be described later is projected and retracted from the opening 45. The front portion 41 is provided with flange portions 41a on both sides of the front edge and ribs 41b that are located on both sides and are slidably fitted into the case side guide recess 32a.

  A cam groove plate portion 44 is integrated with the rear portion 42 in the longitudinal direction of the small tube portion. The small tube portion projects from the tube portion opposite to the plate portion 44 and is fitted into the restriction groove 30a, and the upper portion of the projection 42a is cut out to fit into the plate portion 49 of the latch claw 46. A missing portion (not shown) and a shaft hole 42b attached to both sides to pivotally support the shaft portion 48a of the latch claw 47 are provided. Heart-shaped cam grooves 5 are provided on both sides of the cam groove plate portion 44, respectively. The cam grooves 5 on both sides have the same shape, and a guide groove 5a extending from the left side to the right side as shown in FIG. 2 (a) along the periphery of the convex cam island, and located on the right side of the guide groove 5a and separated vertically. The guide groove 5b for locking and the guide groove 5d for release, the concave locking groove 5c positioned between the guide grooves 5b and 5d, the return groove 5e extending leftward from the guide groove 5d, and the like. The groove bottom surfaces of the grooves 5a to 5e are substantially flat. Reference numeral 41 c is a rib that is provided continuously to the plate portion 44 and the front portion 41 and is slidably fitted into a case-side guide recess (not shown).

  On the other hand, the latch claw 46 includes a claw portion 47 and a support portion 48, and the whole is disposed on the small tube portion side with the claw portion 47 positioned in the opening 45 as shown in FIG. 2. That is, the support portion 48 is composed of one piece extending on both lower sides of the claw portion 47, and is provided opposite to the lower end and the shaft portion 48a provided on each piece and facing the upper and lower middles. And a convex portion 48b. Further, the plate portion 49 described above protrudes between the two pieces.

(Assembly, etc.) The above members are assembled in the following manner. First, the latch claw 46 is attached to the latch member 4. In this operation, each shaft portion 48a is pushed into the corresponding shaft hole 42b from the state shown in FIG. Then, the latch claw 46 is pivotally supported by a predetermined range with the shaft portion 48a as a fulcrum, and the claw portion 47 is placed in the opening 45 as shown in FIG. ) As shown in FIG. 5A, and can be switched to a locked state in which it protrudes from the opening 45 and engages with the recess 22b of the striker 20. Next, the latch member 4 with the latch claw 46 is assembled in the case 2. In this operation, it is preferable that the spring member 6 is mounted on the support shaft 35 and the pin member 7 is swingably held on the bottom wall 33 and placed in the case 3 in advance. The pin member 7 is inserted into the case through the pin insertion holes 34b at both ends 7c, and then the intermediate portion 7a is elastically held by a pin receiving portion (not shown). In this state, the pin member 7 is held upright in a swingable manner in the case 2, and the U-shaped side portions 7 b are regulated between the regulating vertical ribs 39 and the corresponding inner wall surfaces. When the latch member 4 is pushed into the case 3 in a state where the ribs 41b and the like are aligned with the corresponding guide recesses 32a and the like, when the protrusion 42a falls into the restriction groove 30a and is fitted, the case 2 Against being assembled. In the process of pushing the latch member 4, the upper side of the spring member 6 enters the small cylinder portion, and both ends 7 c of the pin member 7 are groove inlets of the corresponding cam grooves 5 (grooves extending to the left side from the return grooves 5 e. )to go into.

(Striker Assembly) As shown in FIGS. 5 to 9, the assembly 2 includes a striker 20 that is engaged with and disengaged from the latch body 1, a mounting base 23, and a case 26 that is assembled to the base 23. The striker 20 is held between the base 23 and the case 26 so that the sliding position can be adjusted. The striker 20, the base 23, and the case 26 are all resin molded products, but they may be other than resin. Of these, the striker 20 has an engaging projection 22 erected on a substantially rectangular plate portion 21. The plate portion 21 is a sliding plate, and forms a step 21a located on one side of the upper surface and two concave portions 21b extending in the sliding direction on the lower surface. The engaging protrusion 22 has a recess 22b that engages with and disengages from the claw 47 of the latch claw 46 before the tip 22a.

  The base 23 is generally in the form of a piece, and is integrated with the window 23a formed at the middle portion in the longitudinal direction, the mounting holes 23b drilled at both ends in the longitudinal direction, and the lower surface, and on one side in the longitudinal direction. It has the mounting part 24 provided in the overhang | projected state, and the latching | locking part 25 which protrudes in the mounting part 24 and is provided in the both sides of the window part 23a. The window portion 23 a is formed as a rectangular hole substantially at the center of the mounting portion 24, and the lower side is bordered by a rectangular lower frame portion 24 a that protrudes from the lower surface of the mounting portion 24. The lower frame portion 24a is provided with a rib 24b that is slidably fitted to the step 21a of the plate portion 21 in a state where the engaging protrusion 22 protrudes from the window portion 23a. Both locking portions 25 are swinging pieces and have claws 25a formed at the tips.

  The case 26 has a substantially circular cap shape and is sized so that the plate portion 21 is slidably disposed. The end face wall 27 is provided with a leaf spring portion 29 which is partitioned on both sides by slits 27a and 27a and whose central portion is inwardly convex. Reference numeral 28 denotes a small wall portion provided on the end face side to be superimposed on the mounting portion 24. The small wall portion 28 is provided with a recess 28a corresponding to each locking portion 25, and the claw 25a is locked to the recess 28a. Reference numeral 27 b denotes a notch for die cutting for forming the small wall portion 28.

(Assembly, etc.) The above members are assembled in the following manner. The striker 20 is disposed so that the plate portion 21 is in the case 26 and the portion located between the concave portions 21 b is held on the plate spring portion 29. From this state, the base 23 is attached to the case 26. That is, the base 23 elastically pushes each locking portion 25 into the corresponding concave portion 28a with respect to the case 26 in a state where the engaging protrusion 22 of the striker 20 is inserted into the window portion 23a. Then, the case 26 is assembled to the base 23 through the engagement between the claw 25a and the recess 28a. In this assembled state, the striker 20 is elastically held so that the plate portion 21 can slide between the base side mounting portion 24 and the case side leaf spring portion 27b. In this holding structure, the striker 20 is regulated in the sliding direction by the rib 24b fitted in the step 21a, and the sliding range is regulated by the window 23a through which the engaging protrusion 22 is inserted. .

(Usage example) In the latch device described above, as illustrated in FIG. 1 described above, the latch main body 1 is attached to the inner front side of the box-shaped base 8, and the striker assembly 2 corresponds to the latch main body 1. It is attached to the lid body 9. In this mounting operation, in the conventional latch device, the latch main body and the striker have to satisfy a predetermined mounting position accuracy, which is a troublesome work. However, in the latch device of the embodiment, even if the latch main body 1 and the striker assembly 2 are relaxed with respect to the mounting position accuracy, the striker 20 is slid in the direction of the arrow with respect to the base 23 after the striker assembly 2 is attached. By moving, the final positional accuracy of the striker 20 with respect to the latch main body 1 can be satisfied. Also, the striker 20 ensures left and right positional accuracy by sliding adjustment with respect to the base 23, and the vertical positional accuracy is determined by the latch member 4. Since it can be absorbed by the shape of the front insertion port, that is, the inner side 43 of the front side (rectangular long side shape), the mounting operation is not troubled again due to a mounting failure. Further, for example, even when the positional accuracy of each other becomes incorrect due to long-term use, it can be easily corrected by adjusting the position of the striker 20 with respect to the base 23. Thereby, the latch apparatus of a form can improve mounting operability significantly, or can improve reliability.

(Operation) FIG. 2A shows a released state of the latch body 1. That is, in the latch main body 1, the latch member 4 is urged and moved by the spring member 6 (this movement is regulated by the protrusion 42a hitting the right end surface of the regulation groove 30a), and the latch claw 46 moves the claw portion 47. It is rotated in a direction to enter the opening 45 (this rotation is performed by the protrusion 48b riding on the highest portion of the overhanging portion 38). When the lid 9 is rotated in the closing direction against the urging force, the latch member 4 is pushed leftward in FIG. 2 against the urging force of the spring member 6 by the striker 20, and the latch claw 46 is rotated with the shaft portion 48a as a fulcrum, and the claw portion 47 engages with the recess 22b to prevent the striker 20 from coming off. The latch member 4 is locked at the locking position shown in FIG. That is, each tip 7c of the pin member 7 enters the locking guide groove 5b from the guide groove 5a by the leftward movement of the latch member 4, and when the pressing force on the latch member 4 is released, the lock groove 5c. It is locked to. By this locking, the lid body 9 is held in the closed position. When switching from FIG. 2B to FIG. 2A, the lid 9 is once pushed toward the base 8 side to release the pushing force (release the pushed hand). Then, the latch member 4 is also slid leftward, and each tip 7c of the pin member 7 returns to the groove entrance again from the locking groove 5c through the release guide groove 5d and the return groove 5e. 46 is switched to the initial release position. Note that when the recess 22b of the striker 20 is released from the claw portion 47 of the latch claw 46, the lid body 9 is automatically switched to the open position by a biasing means (not shown). These are the same as the conventional push-push locking mechanism.

  The present invention is not limited to the above embodiment, and the latch body 1 is not limited to the push / push locking mechanism. Moreover, the structure which hold | maintains the striker 20 with respect to the base 23 so that sliding position adjustment is possible can further be deformed with reference to this form.

1 ... Latch body (push / push locking mechanism)
2 ... Striker assembly 3 ... Case 4 ... Latch member (41 is the front part, 43 is the inside corresponding to the front insertion part)
DESCRIPTION OF SYMBOLS 5 ... Cam groove 6 ... Spring member 7 ... Pin member 8 ... Box-shaped base | substrate (1st member)
9: Lid (second member)
20 ... striker (21 is a plate part, 22 is an engaging protrusion)
23 ... Mounting base (23a is a window portion, 25 is a locking portion)
26 ... Case (29 is a leaf spring)

Claims (3)

In the latch device having a striker attached to the second member corresponding to the latch body on the first member side, inserted from the front insertion port of the latch body and releasably locked in the latch body,
The striker is attached to the second member so as to form a window portion penetrating the upper and lower surfaces, and is assembled to the base corresponding to the window portion to form a convex leaf spring portion on the inside. And a substantially cap-shaped case,
The base end side of the striker is placed between the leaf spring portion and the base, and is held upright so that the sliding position can be adjusted against the elastic force of the leaf spring portion , and the tip end side of the striker Projecting outward from the window . The striker corrects misalignment in one direction left and right or up and down forming the front insertion port of the latch body by adjusting the sliding position with respect to the base, and the misalignment in the other direction is corrected by the opening width of the front insertion port. The latch device according to claim 1, wherein the latch device is absorbed by setting a size large. 3. The latch device according to claim 1, wherein the latch body includes a push-push locking mechanism that locks the striker by a first pushing operation and unlocks the striker by a next pushing operation. 4.

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