JP4430469B2 - 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). A push-push locking mechanism that locks the striker that is a member to be engaged and disengaged, and unlocks the striker by the next pushing operation (this may be referred to as a push-lock / push-open mechanism, hereinafter the same) ).

FIG. 6 shows a latch device disclosed in Patent Document 1. The latch device shown in FIG. 1 has a housing 2 that is open at one end, an abutting portion 32 that abuts against the striker 62 , and a cam groove 5. The latch device is disposed in the housing 2 and resists the biasing force of the spring member 45. Trace along the cam groove 5 and the engaging claw 37 that has the claw 39 to be moved, the claw 39 on the distal end side, and the pin 38c on the proximal end side, and is pivotally supported by the sliding body 30. And a pin member 6. Here, the engaging claw 37 is pivotally supported in a state in which the shaft portion 37 a provided below the middle of the upper and lower sides is fitted to the corresponding portion of the sliding body 30. As shown in (a), the position is switched between the unlocking position almost retracted in the sliding body 30 and the locking position where the claw 39 protrudes from the sliding body 30 and presses the striker 62 as shown in (b). At 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 claw 37 rides on the pin 38c on the rib 28 provided in the housing 2, thereby 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 maintained in the position after the movement through the engagement of the cam groove 5 and the pin member 6. At the same time, the engaging claw 37 moves the pin 38 c to a portion lower than the protruding portion of the rib 28 and tilts to project the claw 39 from the inside of the sliding body 30. In other words, in the above latch device, the engaging claw 37 is switched 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. It consists of a so-called push-push locking mechanism that releases. Such a structure is the same in Patent Document 2.

JP 2004-137725 A JP 2001-262915 A

Since the latch device as described above is locked by the first pushing operation and unlocked by the next pushing operation, it is excellent in usability and is used in various devices and facilities. And it turned out that there exists a possibility that the following malfunction may be produced in use under the severe environment called ultra-low temperature depending on a use, for example. That is, the malfunction is caused by the fact that the engaging claw 37 does not rotate and is not switched to the locked state even if the sliding body 30 is moved from the initial position in FIG. This is a phenomenon in which the unlocked state kept in the sliding body 30 is maintained. One of the causes of this phenomenon is that, for example, when the pivoting portion (shaft portion 37a and shaft hole) of the engaging claw 37 is placed at an ultra-low temperature, the sliding resistance increases and it becomes difficult to rotate. Accordingly, an object of the present invention is to improve the quality and expand the application by eliminating the above-described problems and preventing the occurrence of malfunction even when used in a harsh environment.

The present onset bright order to achieve the above object, a housing insertable from one end opening of the striker, said has a striker abutment for abutting portion and both sides of the cam groove, the spring member disposed within said housing A sliding body that is moved against the biasing force;
There is a claw on the distal end side and pins on both sides of the proximal end, and is pivotally supported by the sliding body so that the claw protrudes from the sliding body and locks the striker. An engaging claw that is switched to a substantially retracted unlocking position; and a pin member that traces along the cam groove, and the sliding body is pressed through the striker to resist the biasing force of the spring member. A latch device comprising a push-push locking mechanism that is maintained in the position after the movement through the cam groove and the pin member when moved, and the engaging claw is switched from the unlocking position to the locking position; The target is the following configuration.
That is, the housing abuts against the pins on both sides of the base end of the engaging claw and switches the engaging claw from the locked position to the unlocked position, and the engaging claw is difficult to rotate. Even when the spring member is moved against the biasing force of the spring member together with the sliding body, the engaging claw is brought into contact with the pin from the unlocking position to the locking position when it is not switched from the unlocking state to the locking state. Ru configuration der having a tapered surface for switching.

In the above inventions, Ri by the tapered surface to allow switching from unlocked position the engagement claw in contact with the engaging claw side pin against the locking position, it occurs in a severe environment such as described challenges It is possible to mechanically resolve the malfunction that has been caused.

The present invention as described above can reliably eliminate the malfunction under the severe environment mentioned in the problem only by attaching a tapered surface on the housing side corresponding to the pin on the engagement claw side, thereby improving the quality and Can expand applications. Further, the engagement claw with forms the base end sides of the pins, since the housing is formed a tape supermarkets surfaces corresponding to said two pins, for example, stable even device becomes large The operation switching can be maintained.

Figures 1-5 are shown the latching device of the first embodiment. In the description of the following will be described the operation and latching device and assembly of the first embodiment.

(First Embodiment) FIG. 1 shows a latch device in a locking position of an engaging claw, wherein (a) is a top view, and (b) is a cross-sectional view taken along line AA of (a), (C) is a front view seen from the B direction of (a), and (d) is a bottom view. 2A and 2B are schematic operation diagrams of the latch device, in which FIG. 2A shows an engagement claw unlocking position, and FIG. 2B shows an engagement claw locking position. FIG. 3 is a schematic operation diagram showing the relationship between the housing-side tapered surface and the engaging claw, which is taken along the line CC in FIG. FIG. 4A shows the latch device in a state when the G sensor is operated, and FIG. 4B is a schematic operation diagram showing a switching operation when releasing the striker. FIG. 5 is a schematic exploded view showing the relationship between the members of the latch device. In addition, in each figure, the same code | symbol is attached | subjected to the member and site | part which are the same as that of the latch apparatus of FIG. 6, or a part.

  The latch device 1 shown in FIGS. 1 to 5 includes a housing 2 into which a striker 62 can be inserted from one end opening, a latch member 3 in which an engaging claw 37 is pivotally supported on a sliding body 30, and a vertical movement with one end side as a fulcrum. And a spring member 45 that biases the latch member 3 toward the one end opening side of the housing 2 and a biasing member 46 that biases the responder 40. The latch device 1 is attached to the box-shaped base body 60 as shown in FIG. 2A, for example, and engages and disengages the striker 62 provided on the movable body 61. That is, for example, in a mode in which the movable body 61 is biased toward the closed position, the latch device 1 is locked via the striker 62 when the movable body 61 is pushed against the biasing force toward the closed position. Furthermore, it comprises a push-push locking mechanism that is unlocked when it is pushed in the same direction and released.

  Here, the responder 4 and the urging member 46 are adopted as specifications that make the latch device 1 susceptible to vibration, and are called G sensors that prevent the latch member 3 from malfunctioning due to vibration or the like. However, it may be omitted. The use of the latch device 1 is the same as that of the above-described documents 1 and 2, and is used when the movable body 61 such as a lid is detachably locked to the box-shaped base. It is possible to attach and disengage the striker provided on the box-shaped substrate side. Details of each member are as follows.

  As shown in FIGS. 1 and 5, the housing 2 has a cylindrical shape in which the inside is roughly partitioned by front and rear walls 20, 21, both side walls 22, and a bottom wall 23, and one end side, that is, the upper side is opened. Among these, the front wall 20 is located in the middle of the left and right, and guide grooves 20a for restricting the sliding range of the latch member 3 (sliding body 30) and the latch member 3 (engaging claws 37) projecting on both sides of the inner surface. And a rib 28 that can be rotated in the unlocking direction. As shown in FIG. 2, the rib 28 includes a flat projecting portion that is the highest, and an inclined portion that is connected to the upper and lower portions of the projecting portion and gradually decreases. Reference numeral 20 b denotes a meat escape recess for forming the rib 28. On the inner surface of the rear wall 21, regulating vertical ribs 29 are provided in pairs so as to correspond to the U shape of the pin member 6. The vertical rib 29 extends from the bottom wall 23 to the vicinity of the upper and lower intermediate positions, and is provided in a state where the lower side protrudes one step larger, so that the U-shaped side portions 6b of the pin member 6 are between the corresponding inner side surfaces of the side walls 22. Regulate the position. The both side walls 22 are provided with elastic locking claws 27 for attachment that are partitioned by slits and project the upper side outward. A concave portion 22b and a guide concave portion 22c extending in the vertical direction are provided on the inner surfaces of the side walls 22 so as to face each other.

  Further, the housing 2 has a cylindrical upper and outer periphery that protrudes one step, is open on the front wall 20 side on the lower side, and is formed for a responder that is partitioned in a state in which a part 25a of both side walls 22 is missing. A small frame portion 25 is provided. The bottom wall 23 has a stepped portion 25a that is lacking, and the upper side of the portion 25a communicates with the inside of the housing through a small hole 24a for die cutting. For this reason, the bottom wall 23 has two small holes 24a, a substantially L-shaped pin insertion hole 24b penetrating to both sides of the rear wall 23, and an elastic pinch formed by a small slit between the pin insertion holes 24b. Pieces 23a and 23b, pin receiving portions formed between the pin insertion holes 24b and the small slits are provided. The pin insertion hole 24 b has a hole width slightly larger than the wire diameter of the pin member 6, and allows the substantially U-shaped pin member 6 to be inserted into the housing 1 from this hole. And the pin member 6 is pivotally supported by the elastic clamping pieces 23a and 23b so that rocking | fluctuation is possible. That is, the pin member 6 includes a U-shaped intermediate portion 6a, U-shaped side portions 6b, and a tip 6c that is bent inward at the free end sides of the both side portions 6b.

  Shaft holes 25b are provided on both sides of the small frame portion 25 described above. The inner side of the small frame portion 25 communicates from the front to the inside of the housing, and is provided on the bottom surface to define a spring receiving recess for positioning the urging member 46, and an upper surface in the frame, and in the housing. And a wall 26 projecting from a support shaft 26a. Further, the upper side of the missing part 25a is communicated with the housing 2 through the hole 24a as shown in FIG. 3, and a tapered surface 47 is provided on the side surface defining the hole 24a. The tapered surface 47 is a main part of the present invention, and is formed as an inclined portion inclined downward. That is, the tapered surface 47 is inclined downward slightly from the front side to the front wall 20 side from the substantially front-rear middle in the housing, and the engaging claw 37 constituting the latch member 3 is lowered together with the sliding body 30. When moving, the pin 38c of the engaging claw 37 is brought into contact with the tapered surface 47 so that it can be mechanically rotated or tilted from the front side to the rear side with the shaft portion 37a as a fulcrum.

  In the small frame portion 25, the responding body 4 is disposed so as to be swingable, and a biasing member 46 is disposed between the lower recess of the responding body 4 and the spring receiving recess. . The responding body 4 has a small block shape, and is fitted into the abutting portion 41 that abuts the inner upper surface of the small frame portion 25, the protruding receiving portion 42 that abuts the corresponding lower surface of the sliding body 30, and the shaft hole 25b. The shaft portions 43 on both sides and the spring receiving recesses on the lower surface side are integrally provided.

  The latch member 3 includes a sliding body 30 and an engaging claw 37. The sliding body 30 has an abutting portion 32 on the back side of the main body 31. That is, the main body 31 is formed in a substantially U-shaped frame shape with the upper side 33a and both side sides 33b, and the opening 33 is defined by the upper side 33a and both side sides 33b. On the lower side, a shaft hole 33 d is provided through each side 33 b, and a cylindrical portion 34 is provided between each side 33. The cylinder portion 34 is a hole in which the inside of the cylinder can be loosely fitted on the upper side of the support shaft 26a and the spring member 45, and has a protrusion 34b fitted to the guide groove 20a. The abutting portion 32 includes a horizontal wall portion with which the striker 62 abuts and a vertical wall portion extending downward from the middle of the horizontal wall portion. Both sides of the horizontal wall portion protrude slightly outward from the main body 31 and are slid in a state of being fitted in the guide recess 22 c of the housing 2. The vertical wall portion has heart-shaped cam grooves 5 on both sides. The cam grooves 5 on both sides have substantially the same shape, and projecting cam islands 35 projecting from a substantially central part of the vertical wall part, blade pieces 36a projecting on both lower sides of the vertical wall part, etc. It is partitioned by. The groove shape includes a guide groove 5a extending from the lower side to the upper right side, a locking guide groove 5b positioned on the upper side of the guide groove 5a, and a release guide groove 5d, and a guide groove 5b, 5d. The groove includes a concave locking groove 5c positioned on the lower side, a return groove 5e extending downward from the guide groove 5d, and the bottom surfaces of the grooves 5a to 5e are substantially flat.

On the other hand, the engaging claw 37 includes a main body 38 and a claw 39, and the whole is disposed between the upper side 33 a and both side sides 33 b of the main body 31 with the claw 39 positioned in the opening 33. As for the main body 38, the upper part 38a protrudes the nail | claw 39, and the lower part 38b lacks the intermediate part. When the upper portion 38 a is disposed within the U-shaped frame shape of the main body 31, the claw 39 enters the opening 33. The lower part 38b is in the form of two pieces extending from the upper part 38a. The lower part 38b has a shaft part 37a provided in the middle between the upper and lower sides and a pin 38c provided at the lower end on the outer surface of each lower part 38b. ing. Between both the lower portions 38b, a projecting piece portion 37b that enters the above-described cylindrical portion 34 is provided.

(Assembly) Each member described above is assembled in the following manner, for example. First, the engaging claw 37 is attached to the sliding body 30. In this operation, the shaft portion 37a is pushed from the side 33b into the shaft hole 33d from the state shown in FIG. Then, the engaging claw 37 is pivotally supported by a predetermined range with the shaft portion 37a as a fulcrum, and the claw 39 is in the unlocked state in which the claw 39 is accommodated in the opening 33 as shown in FIG. As shown in (b), it is possible to turn and switch to the locked state in which the protrusion or claw of the striker 62 is pressed from above by protruding from the opening 33. The responding body 4 is arranged in the housing together with the urging member 46 with respect to the small frame portion 25 from the inside of the frame, and the shaft portion 43 on both sides is fitted and supported in the corresponding shaft hole 25b. It is assembled to be movable.

  Next, the sliding body 30 with the above engaging claws 37, that is, the latch member 3 is assembled in the housing 2. In this operation, it is preferable that the spring member 45 is mounted on the support shaft 26a and the pin member 6 is swingably held on the bottom wall 23 and disposed in the housing 2 in advance. The pin member 6 is inserted into the housing through the pin insertion holes 24b on both sides, and then the U-shaped intermediate portion 6a is forcibly moved toward the elastic pinching pieces 23a and 23b, whereby the elastic pinching piece 23b. And the elastic clamping piece 23a. In this sandwiched state, the pin member 6 is held upright in the housing 2, the upper side of both side parts 6 b is pressed against the inner surfaces of both sides so as to be swingable, and the U-shaped side parts 6 b correspond to the regulating vertical ribs 29 and the corresponding inner side surfaces. The position is restricted between. When the latch member 3 is pushed into the housing 2, the latch member 3 is prevented from being detached from the housing 2 and assembled when the projection 34b is fitted into the guide groove 20a. In the process of pushing the latch member 3, the upper side of the spring member 45 enters the cylindrical portion 34 and comes into contact with the protruding piece portion 37 b of the engaging claw 37. Further, both ends 6c of the pin member 6 enter the corresponding groove inlets of the cam grooves 5 (grooves extending downward from the return grooves 5e).

(Operation 1) As described above, the assembled latch device 1 is in a state in which the claw 39 of the engagement claw 37 is not visible when viewed from above, that is, in the unlocked state. As a usage mode, for example, it is attached to an appropriate position of the box-shaped base 60 corresponding to the striker 62 of the movable body 61 via an elastic locking claw 27 or the like. In the mounted state, as shown in FIG. 2 (a), the latch device 1 is urged and moved by the latch member 3 by the spring member 45 (this movement is restricted by the protrusion 34b hitting the upper end surface of the guide groove 20a), or The claw 39 is rotated in a direction in which the claw 39 enters the opening 33 (this rotation is performed by the pin 38c riding on the highest point of the rib 28). This state is the “lock release position of the latch member 3”. When the latch member 3 is pushed by the striker 62 against the urging force of the spring member 45 in the direction of the arrow in FIG. 2A, the engaging claw 37 is rotated about the shaft portion 37 a as a fulcrum. Secure the tip of the. The latch member 3 is locked at the locking position shown in FIG. 2B by releasing the pushing force. That is, each tip 6c of the pin member 6 enters the locking guide groove 5b from the guide groove 5a by the downward movement of the sliding body 30 and the engaging claw 37, and when the pressing force on the latch member 3 is released, Locked in the locking groove 5c. By this locking, the movable body 61 is held (locked) in the closed position.

  When switching again from the above-mentioned locked state to the released state of FIG. 2A, the latch member 3 is pushed again through the striker 62 as shown in FIG. 4B, and the pushing force is released (the pressed hand is released). ). Then, each tip 6c returns from the guide groove 5a through the release groove 5d and the return groove 5e to the groove inlet, and at the same time, the latch member 3 (the sliding body 30 and the engaging claw 37). Is switched to the initial release position. In the latch device 1, as shown in FIG. 4 (a), when receiving a vibration load in the vertical direction, the latch member 3 is pressed downward as shown in FIG. 4 (b). There is a risk that the lock will be released due to malfunction. In this structure, such a malfunction can be prevented by the following operation. That is, in this structure, when receiving a vibration load, the responder 4 is rotated in one direction (in this example, counterclockwise) with the shaft portion 43 as a fulcrum against the urging force of the urging member 46. By changing the position of the protrusion receiving portion 42 with the movement and receiving the lower end surface of the side 33b of the sliding body 30 on the protrusion receiving portion 42, the downward movement of the sliding body 30 is prevented. As a result, the tip 6c of the pin 6 slides from the locking groove 5c to the release guiding groove 5d so that the locking is not inadvertently released from the locking groove 5c.

(Operation 2) By the way, in the conventional latch device, when used in a harsh environment such as a cold region, the engaging claw 37 is pivotally supported (the fitting between the shaft portion 37a and the shaft hole 33d as described in the problem). ) As a fulcrum, and there is a possibility that the normal locking operation, that is, the locked state cannot be switched from the unlocked state. However, in this structure, when the latch member 3 is pushed by the striker 62 in the direction of the arrow in FIG. 2A, the reaction force received by the engagement claw 37 from the tapered surface 47 with the downward movement of the sliding body 30 causes the shaft to rotate. It is mechanically rotated toward the locking position with the portion 37a as a fulcrum. In other words, as schematically shown in FIG. 3, the engaging claw 37 is brought into contact with the tapered surface 47 inclined downward on the housing 2 side by the downward movement, and the guide action of the tapered surface 47 (from the tapered surface 47). From the substantially upright state by the reaction force received, the shaft portion 37a is rotated obliquely with the shaft portion 37a as a fulcrum and is forcibly switched to the locking position. Therefore, with this structure, malfunctions and malfunctions do not occur even when the application is in a harsh environment, so that application expansion and reliability can be improved.

The above actual施例are not intended to limit the invention. Latch device of the present invention it is sufficient provided the requirements specified in the claims, the details are capable variously modified as necessary.

It is a block diagram which shows the latch apparatus of 1st Example of invention in a latching state. It is an operation | movement figure which shows the said latch apparatus in a latch release and a latching state. It is a reference diagram for explanation schematically showing the main part operation of the latch device. It is an operation | movement figure which shows the said latch apparatus in the state at the time of the operation | movement of G sensor, and the operation for latch release. It is a general | schematic exploded block diagram which shows the relationship between the members of the said latch apparatus. It is an action | operation figure which shows the example of the conventional latch apparatus in the latch release position and the latching position.

1 ... Latch device (push / push locking mechanism)
2 ... Housing (20 and 21 are front and rear walls, 22 are both side walls, 23 is a bottom wall)
DESCRIPTION OF SYMBOLS 3 ... Latch member 4 ... Responsive body 5 ... Cam groove 6 ... Pin member 28 ... Rib 30 ... Sliding body (33 is an opening, 33d is a shaft hole)
37 ... engaging claw (37a is a shaft, 38c is a pin, 38d is a pin portion, 39 is a claw)
45 ... Spring member 46 ... Biasing member 47 ... Tapered surface 60 ... Box-shaped substrate 61 ... Movable body (62 is a striker)

Claims (1)

A housing into which the striker can be inserted from one end opening;
A sliding body that has an abutting portion that comes into contact with the striker and cam grooves on both sides , is disposed in the housing and is moved against the urging force of a spring member;
There is a claw on the distal end side and pins on both sides of the proximal end, and is pivotally supported by the sliding body so that the claw protrudes from the sliding body and locks the striker. An engaging claw that is switched to a substantially retracted unlocking position;
A pin member that traces along the cam groove,
When the sliding body is pressed through the striker and moved against the urging force of the spring member, the sliding body is held at the position after the movement through the cam groove and the pin member, and the engaging claw is locked. In a latch device comprising a push-push locking mechanism that can be switched from a release position to a locking position,
The housing has ribs that contact the pins on both sides of the base end of the engagement claw and switch the engagement claw from a locking position to a locking release position, and the engagement claw is difficult to rotate and the sliding body And a taper that contacts the pin and switches the engaging claw from the unlocking position to the locking position when it is not switched from the unlocked state to the locked state even when moved against the biasing force of the spring member. A latch device having a surface.

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