JP4312030B2 - Motion conversion mechanism, drive device, latch device, and furniture - Google Patents

Description

  The present invention relates to an operation conversion mechanism that can convert both forward and reverse rotation operations of a rotary shaft into a drive operation in one direction of a drive arm with a simple structure, and a drive device, a latch device, and furniture using the same. It is.

  One of the drive devices having a structure for converting the rotation operation of the rotation shaft into the drive operation of the drive arm is a latch device used for mooring a movable part to a furniture body in furniture or the like. This type of latch device is configured such that the handle, the transmission mechanism and the latch are arranged on the movable part, and the latch receiver is arranged on the furniture body so that the operation in the release direction of the handle is interlocked with the release operation of the latch. Yes. Then, the latch is moored to the latch receiver by moving the movable portion, and the mooring cannot be released unless the handle is operated.

  However, in such a conventional latch device, the handle operating direction is usually limited to one direction. For example, in the case of a drawer latch device, the handle is supported around a horizontal rotation shaft, and the rotation shaft and other mechanical parts are linked to this handle so that the back of the hand is down and the belly of the finger is raised. Generally, the latch is released by putting a finger on the lower end side of the handle from below and pulling it upward. Therefore, the usability may be deteriorated depending on the drawer placed at a high position and the height of the user. In particular, for those who cannot move their fingers satisfactorily due to injury or other reasons, it is a great disadvantage that the direction of operation is limited.

  In order to solve such inconvenience, an operation conversion mechanism as disclosed in Patent Document 1 and a latch device using the same have been proposed. In this device, a handle is provided on a movable body (door) so as to be rotatable about a rotation axis, and a latch body is arranged on the movable body so as to be rotatable about a transmission axis intersecting the rotation axis. An operating rod extending so as to intersect with the rotating shaft is provided, an abutting member extending so as to intersect with the rotating shaft is disposed on the operating rod, and a pair of pressing portions are provided on the handle member with the rotating shaft interposed therebetween.

Then, when the handle member is rotated forward and backward, either one of the pressing portions according to the rotation direction presses the contact body to drive the operating rod, which is latched via the transmission shaft. Is transmitted as an operating force for releasing the engagement.
JP 2002-322849 A

  However, in such a case, even if the rotating shaft rotates in any direction, the other pressing portion is always retracted backward while one pressing portion is pushed forward, so that a retreat allowance is required. In addition, a rod-shaped contact body must be provided over a region where both pressing portions contact, and an operating rod that intersects the transmission shaft must be driven through the contact portion.

  As described above, since a certain amount of installation space is required between the rotating shaft and the operating rod, there is a surface that is difficult to apply to a space-constrained one. Also, the work of adjusting the position of the contact body and incorporating it is troublesome.

  The present invention provides a separate new motion conversion mechanism that can be configured by simply incorporating element parts even in a small space through a different structure, and that can accurately convert the motion of the rotating shaft, and this It is an object to provide a drive device or the like utilizing the above.

  In order to achieve this object, the present invention takes the following measures.

That is, the motion conversion mechanism of the present invention is such that a drive arm is connected via a joint at a position displaced in the radial direction from the rotation shaft, and the rotation operation of the rotation shaft is converted into the drive operation of the drive arm. There,
When the rotating shaft rotates in one direction, the joint does not operate and the drive arm is attached to the rotating shaft integrally to drive the tip portion in one direction, and the rotating shaft rotates in the other direction. In this case, the joint portion is actuated so that the driving arm is bent so as to bend from the joint portion, and the driving operation for pushing the tip portion in the one direction is performed.

  Even if the rotation shaft rotates in any direction, almost the same squeezing operation is obtained in one direction at the tip of the drive arm, so that there is no need to provide two pressing portions for the driven object. For this reason, a press part and a peripheral mechanism part can be comprised compactly compared with the case where a press part is provided in the both sides of a rotating shaft. In addition, if the joint is configured at a position displaced in the radial direction from the rotating shaft, and the drive arm is attached via this joint, the operation conversion is completed at the end of the rotating shaft, so that the assembly and adjustment of element parts can be done easily. It can be done.

  In order to realize the above operation with a simple structure, the drive arm has a balance fulcrum in the middle, and when the rotating shaft rotates in the other direction, the position where the balance fulcrum is prohibited from moving in any other direction. The balance fulcrum is brought into contact with the support provided on the shaft, and thereafter, as the joint moves in the other direction along with the rotation of the rotation shaft, the tip is driven in one direction by a balance operation around the balance fulcrum. It is preferable to perform the operation.

  In order to configure the joint without using complicated parts, a fixed arm that protrudes in the radial direction is provided on the rotating shaft, and the drive arm is connected to the protruding end of the fixed arm via a support shaft that forms the joint. It is desirable to provide a restricting portion between the drive arm and the fixed arm that prohibits the drive arm from rotating in the other direction and allows the drive arm to rotate only in one direction.

  The balance fulcrum can be easily realized by providing a protrusion on the edge located in the other direction of the drive arm.

  According to the present invention, the forward / reverse input applied to the input end is transmitted to the rotary shaft, and the forward / reverse rotation of the rotary shaft is converted into a drive operation in one direction by the motion conversion mechanism. Thus, it is possible to easily configure a drive device that directly drives the drive object at the tip of the drive arm.

  In this case, even if an input in any direction is applied to the input end, a similar drive output can be obtained at the tip of the drive arm under the basic action and effect described through the motion conversion mechanism. In addition, since the pressing portion is only at one position at the tip of the drive arm, if the drive object is positioned at the tip of the drive arm, the driving force can be transmitted without giving a special shape to the drive object. it can.

  Alternatively, according to the present invention, the forward / reverse input applied to the input end is transmitted to the rotating shaft, and the forward / reverse rotation of the rotating shaft can be driven into one direction of the drive arm by the motion conversion mechanism. It is also possible to easily configure a drive device that converts the drive operation of the drive arm to the output end via the transmission mechanism.

  In this case as well, the same drive output can be obtained at the tip of the drive arm, regardless of which direction of input is applied to the input end, under the basic effects described through the motion conversion mechanism. In addition, since the pressing portion is only at one position of the tip end portion of the drive arm, if the start end portion of the transmission mechanism is positioned at the tip end portion of the drive arm, the driving force can be transmitted without giving a special shape to the start end portion. be able to. Note that the output operation at the output end may take any form such as a rotation operation, an advance / retreat operation, and a swing operation.

  Such a drive device has a handle as an input end, a latch as an output end, and a transmission mechanism that connects the drive arm and the latch so that the latch release operation is interlocked with any drive operation of the drive arm. Thus, the present invention can also be used when a latch device is configured.

  According to the present invention, the basic operation and effect described above with respect to the motion conversion mechanism can be obtained, and the pressing portion is provided at only one of the tip portions of the drive arm, so that the start end portion of the transmission mechanism is used as the tip portion of the drive arm. If positioned, the driving force can be transmitted without giving a special shape to the starting end portion. In particular, drawers, doors, and the like to which the latch device is applied have extremely limited space for assembling element parts, and it is desired to make the motion conversion mechanism simple and compact. The effect is extremely large.

  It is preferable that the support portion uses an inner wall of a hollow box-like housing in which at least a handle, a rotation shaft, and a drive arm of the latch device are disposed.

  In order to improve handling and assembly convenience, the fixed arm, drive arm and restricting part are unitized, and a shaft hole for attaching the fixed arm to the rotary shaft so as to be integrally rotatable is provided on the base end side of the fixed arm. It is desirable to keep it.

  In order to directly drive the operating rod with the drive arm and eliminate the need for a member such as an abutment body, the transmission mechanism has a transmission shaft arranged in a posture intersecting with the rotation axis and the transmission shaft. And an operating rod that extends parallel to the rotating shaft and is rotatable together with the transmission shaft, and urges the operating rod by an operation in which the tip of the drive arm protrudes in one direction, thereby transmitting the transmission shaft. Is preferably rotated.

  In order to increase the accuracy of the latch without unreasonableness by giving freedom to the arrangement of the latch, the transmission mechanism can be rotated integrally with the transmission shaft arranged in a posture that intersects the rotation axis And a portion of the latch mounted around the axis parallel to the transmission shaft is driven on the tip side of the link so that the latch is not directly driven by the transmission shaft. It is desirable to keep it.

  As a specific embodiment, there is provided an urging means for applying a preload in a direction in which the latch is engaged with the latch receiver, and an operating force input to the handle is applied to the latch via the rotating shaft, the drive arm, and the transmission mechanism. When the operating force disappears, the urging means engages the latch with the latch receiver and at the same time through the transmission mechanism, the drive arm and the rotating shaft. One that causes the movement of offsetting the handle to the neutral position.

  As an application example of such a latch device, a furniture body and a movable portion movable with respect to the furniture body are provided, and the latch device is configured to moor the movable portion at a predetermined position of the furniture body. The thing which has arrange | positioned a handle, a rotating shaft, a motion conversion mechanism, a transmission mechanism, and a latch in a movable part, and has arrange | positioned the latch receptacle in the furniture main body is mentioned.

More specifically, the furniture body includes a storage space that opens forward, and the movable portion includes a hollow box-shaped housing that is disposed at a position to open and close the storage space,
A handle is arranged on the front surface of the housing, a rotating shaft, a motion conversion mechanism and at least a part of the transmission mechanism are arranged in the hollow portion of the housing, and a latch protrudes from the housing and latches at a latch-corresponding position of the furniture body. The thing provided with a receptacle is mentioned.

  According to the present invention, even if the space is small, it is possible to easily incorporate and configure the component parts, so that both forward and reverse rotation operations of the rotation shaft can be effectively applied to the drive operation in one direction of the drive arm. It is possible to provide a new and useful motion conversion mechanism that can be converted, and a drive device, a latch device, and furniture using the same.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The motion conversion mechanism 1 of this embodiment is applied to a latch device 4 that anchors the drawer 2 as a movable body in the storage furniture 3 having the drawer 2 shown in FIG. The drawing schematically shows the operation conversion mechanism 1 and the latch device 4 only for the uppermost drawer 2 for convenience, but the same applies to the other drawers 2.

  That is, the latch device 4 transmits the operating force in the forward / reverse direction input to the handle 21 provided on the drawer 2 and serving as the input end to the rotating shaft 41, and converts both forward and reverse rotations of the rotating shaft 41. The mechanism 1 is converted to a driving operation in one direction, and the driving operation is transmitted to the latch 43 serving as an output end via the transmission mechanism 42.

  Specifically, as shown in FIGS. 1 and 2, the drawer 2 is supported by a storage furniture main body 31 having an opening at least on the front surface via a rail mechanism (not shown), thereby closing and opening the opening. It can be taken in and out of the position. The drawer 2 includes a drawer main body 23 and an end plate 24, and the end plate 24 forms a hollow box-like housing in which the front plate 24a and the back plate 24b are abutted.

  As shown in FIGS. 1 and 3, the handle 21 is accommodated in a handle housing 20 disposed on a front plate 24a constituting the end plate 24 of the drawer 2, and is rotatable about a horizontal axis 21m. The handle 21 is a neutral position in which the front surface 21a is substantially parallel to the front surface of the front plate 24a of the end plate 24. The upper end 21b is positioned at a position displaced upward from the horizontal axis 21m, and the lower end 21c is positioned at a position displaced downward. Is positioned. Then, between the handle 21 and the handle housing 20, an operation space for performing an operation of placing the finger on the lower end 21c from the neutral position and pulling it upward as shown in FIG. 8A, and a finger on the upper end 21b. As shown in FIG. 7A, an operation space for performing an operation of pushing down is formed. The handle 21 can be rotated forward and backward using these operation spaces. However, when no operating force is applied, the handle 21 is offset to a neutral position by a spring 42f which is a biasing means described later.

  The rotating shaft 41 passes through the handle 21 and gives the handle 21 a horizontal axis 21m as a center of rotation. The rotating shaft 41 extends along the width direction of the end plate 24, and ends 41a as shown in FIGS. Is indirectly supported by a bearing 41b provided on the back plate 24b of the end plate 24 through a fixed arm 12 described below. Of the rotating shaft 41, at least a portion where the motion conversion mechanism 1 is formed is formed in a prismatic shape. In addition, when there exists another member which gives the horizontal axis 21m to the handle 21, the rotating shaft 41 may be connected to the other member.

  As shown in FIG. 4 and FIGS. 6 (a), 7 (a), and 8 (a), the motion converting mechanism 1 includes a fixed arm 12 that protrudes in the radial direction on the rotating shaft 41, and the fixed arm 12 A drive arm 11 connected to the protruding end side of the arm 12 and a joint portion 13 connecting the fixed arm 12 and the drive arm 11 are provided. When the rotary shaft 41 rotates in one direction (counterclockwise in the right sectional view), the joint portion 13 does not operate, and the drive arm 11 is integrally attached to the rotary shaft 41 so that the distal end portion 11a moves in one direction ( A drive operation is performed to push the end plate 24 from the back plate 24b of the end plate 24 toward the front plate 24a. When the rotary shaft 41 rotates in the other direction (clockwise as viewed from the right side), the joint portion 13 operates to drive arm. 11 is configured to perform a driving operation that pushes the tip portion 11a in the one direction while operating so as to bend from the joint portion 13.

  As shown in FIG. 5 and the like, the fixed arm 12 has an axial hole 12b1 corresponding to the prismatic shape of the rotary shaft 41 on the inner surface of the base end portion 12b, and a cylindrical protrusion 12b2 on the outer surface. Actually, this cylindrical protrusion 12b2 is supported by the bearing 41b.

  The drive arm 11 has a shaft hole 13b corresponding to a support shaft 13a described below at the base end portion 11b, and has a stopper portion 11c that is undercut at the distal end side. The position adjacent to the base end side of the locking portion 11c corresponds to the distal end portion 11a of the driving arm 11 referred to in the present invention, and the locking portion 11c prevents the operating rod 42b described later from coming off from the driving arm 11. belongs to.

  The joint portion 13 includes a support shaft 13 a that protrudes in the normal direction from the distal end portion 12 a of the fixed arm 12, the shaft hole 13 b provided in the base end portion 11 b of the drive arm 11, and the fixed arm 12 and the drive arm 11. And a restricting portion 13c for restricting the relative rotation to a predetermined range. As shown in FIGS. 5 and 6A and the like, the restricting portion 13 c includes a first restricting piece 13 c 1 provided to protrude in the radial direction from the base end portion 12 b of the fixed arm 12, and a base end portion of the drive arm 11. The relative movement with the second restricting piece 13c2 provided so as to protrude from 11b is utilized.

  In addition, the edge part located in the other direction (back plate 24b side) in the intermediate part of the drive arm 11 is provided with the rounded protrusion 11d with a round shape.

  That is, when the handle 21 is in the neutral position shown in FIG. 6A, the second restricting piece 13c2 comes into contact with or closes behind the first restricting piece 13c1. From this position, when the rotating shaft 41 rotates around the support shaft 13a in one direction shown in FIG. 7A (counterclockwise in the right sectional view), the fixed arm 12 rotates together with the rotating shaft 41 and moves the support shaft 13a in one direction. Take it out (to the front plate 24a side of the end plate 24). At this time, the tip 11a of the drive arm 11 receives a load in the direction of the arrow in FIG. 7A from an operating rod 42b described later, so that the drive arm 11 is held in a posture in which the regulating pieces 13c1 and 13c2 come into contact with each other. As a result, the drive arm 11 rotates integrally with the fixed arm 12 around the rotation shaft 41, and the tip end portion 11a is pushed out in one direction. On the other hand, when the rotating shaft 41 rotates around the support shaft 13a in the other direction shown in FIG. 8A (clockwise when viewed from the right side view), the fixed arm 12 rotates together with the rotating shaft 41 to move the support shaft 13a to the other direction. It is moved in the direction (the back plate 24b side of the end plate 24). In the present embodiment, the projection 11d provided at the intermediate portion of the drive arm 11 at the neutral position shown in FIG. 6 (a) is positioned at a position where it abuts or is close to the inner wall of the back plate 24b of the end plate 24 as a support portion. . For this reason, when the rotating shaft 41 rotates in the other direction shown in FIG. 8A, the protrusion 11d abuts against the inner wall of the back plate 24b, and further movement in the same direction is prohibited. Therefore, thereafter, as the joint portion 13 moves in the other direction along with the rotation of the rotary shaft 41, the drive arm 11 causes a balance operation around the balance fulcrum n provided by the projection 11d, and the base end portion 13b moves in the other direction. The drive operation is performed to push the tip end portion 11a in one direction as it moves to. During this time, the regulating pieces 13c1, 13c2 move away from each other, so that the above-described balance operation is not hindered.

  On the other hand, as shown in FIG. 2, the latch 43 of the present embodiment is arranged at a position to be anchored to a latch receiver 44 provided in the storage furniture main body 31 to which the drawer 2 is attached.

  The latch receiver 44 is provided on the inner surface of the side wall 31a that forms the storage space of the storage furniture body 31, and has an opening with a closed periphery. Then, the latch 43 is inserted into the opening of the latch receiver 44 so that the drawer 2 is moored. The latch receiver 44 is not limited to a closed opening as long as at least the latch 43 can be engaged and latched. If the side wall 31a is a hollow body made of a sheet metal material, it can be formed by punching into the inner surface, and if it is wooden, it can be formed by digging into the inner surface.

  As shown in FIG. 2, the latch 43 is disposed via a latch support 43 a at a corner between the back surface 24 b of the end plate 24 constituting the drawer 2 and the outer surface of the side wall 23 a of the drawer body 23. When inserted into the storage furniture main body 31, it is positioned at a part that can be engaged with and disengaged from the opening of the latch receiver 44.

  The specific configuration of the latch 43 is shown in FIGS. 6B and 6C, FIGS. 7B and 7C, and FIGS. 8B and 8C. In each figure, (b) is a right sectional view of the latch 43 portion corresponding to the state of (a), and (c) is a plan sectional view of (b). The latch 43 is rotatably supported by a shaft 43b provided in the latch support 43a, and is arranged at a position where the latch 43 is brought out to the vicinity of the opening of the latch receiver 44. The tip 43x having a partial arc shape is latched to the latch support 44. The slit 43a1 provided on the side surface of 43a can project and retract outward. The latch 43 is preloaded in a direction protruding outward from the side surface of the latch support 43a by a spring 42f (a torsion coil spring in this embodiment) which is an urging means charged in the latch support 43a. That is, when the drawer 2 is pushed in, it is pushed by the inner surface of the side wall 31 a of the storage furniture main body 31 shown in FIG. 2 and the latch 43 is immersed in the latch support 43 a and is positioned at a portion facing the opening of the latch receiver 44. And engages with the opening of the latch receiver 44. At this time, since the shaft 43b is located at a portion that has passed through the opening, if the drawer 2 is to be pulled out without releasing the latch 43, the latch 43 is more strongly engaged with the latch receiver 44 and serves to inhibit the drawer operation. .

  The reason for adopting such a structure is to reduce the play of the drawer 2 with respect to the storage furniture body 31 with the drawer 2 inserted, and to allow the drawer 2 to be moored with high precision by a relatively small operation of the latch 43. Further, it is unnecessary to form a wide opening for allowing the sickle-shaped latch to rotate in the latch receiver as in the case of using an existing sickle-shaped latch.

  As shown in FIGS. 4 to 8, the transmission mechanism 42 has a transmission shaft 42 a arranged in a posture intersecting with the rotation shaft 41, and extends so as to intersect with the transmission shaft 42 a and parallel to the rotation shaft 41. And an operating rod 42b rotatable with the transmission shaft 42a. The transmission shaft 42a and the operating rod 42b are integrally formed by bending a metal wire, and the end 42b1 of the operating rod 42b is brought into contact with the tip 11a of the drive arm 11 in one direction (the front plate of the end plate 24). 24a side). A link 42c is attached to the lower end portion 42a1 of the transmission shaft 42a so as to be integrally rotatable, and the tip portion of the link 42c is located at a position displaced from the shaft 43b of the latch 43 through an engagement structure comprising a long hole 42d and a pin 42e. It is connected. The above-described spring 42f is engaged with the link 42c so that the latch 43 protrudes from the latch support 43a and is preloaded in a direction to engage with the latch receiver 44.

  That is, the operating force input to the handle 21 from the state of FIG. 6 urges the latch 43 via the rotating shaft 41, the drive arm 11 and the transmission mechanism 42, and applies the latch 43 to the latch 43 against the spring 42f. As shown in FIG. 8, the operation of disengaging from the latch receiver 44 is caused. However, when the operating force disappears, the spring 42f engages the latch 43 with the latch receiver 44, and at this time, the spring force is applied to the link 42c, the transmission shaft 42a, the operating rod 42b, the drive arm 11, the fixed arm 12, and the rotating shaft. On the contrary, an action of offsetting the handle 21 to the neutral position in FIG.

  As described above, the motion conversion mechanism 1 according to the present embodiment connects the drive arm 11 to the position displaced in the radial direction from the rotation shaft 41 via the joint portion 13, and the rotation operation of the rotation shaft 41 is driven by the drive arm 11. This is converted to motion. When the rotary shaft 41 rotates in one direction, the joint portion 13 does not operate, and the drive arm 11 is integrally attached to the rotary shaft 41 and performs a driving operation to push the tip portion 11a in one direction, When the rotating shaft 41 rotates in the other direction, the joint portion 13 is operated, and the drive arm 11 performs a driving operation to push the tip end portion 11a in the one direction while operating to bend from the joint portion 13.

  In this way, even if the rotation shaft 41 rotates in any direction, an operation of almost the same protruding in one direction to the distal end portion 11a of the drive arm 11 can be obtained, and the distal end portion 11a can be always used as a pressing portion. For this reason, there is no need to provide pressing portions for the driven object at two locations. For this reason, compared with the case where a pair of pressing parts are provided on both sides of the rotation shaft 41 and a rod-shaped contact body for contacting them is provided, the pressing part and the peripheral mechanism part are made compact. be able to. In addition, since the joint portion 13 is configured at a position displaced in the radial direction from the rotation shaft 41 and the drive arm 11 is attached via the joint portion 13, the operation conversion is completed at the end of the rotation shaft 41. As compared with the case where the operation conversion is performed further ahead of the rotating shaft 41, the assembly and adjustment of the component parts can be easily performed.

  In particular, the drive arm 11 has a balance fulcrum n in the middle, and when the rotary shaft 41 rotates in the other direction, the drive arm 11 has a support portion provided at a position that prohibits further movement of the balance fulcrum n in the other direction. The balance fulcrum n is brought into contact, and thereafter, as the joint portion 13 moves in the other direction along with the rotation of the rotary shaft 41, a driving operation is performed in which the tip portion 11a is pushed out in one direction by a balance operation around the balance fulcrum n. Like to do. For this reason, the operation | movement which pushes the front-end | tip part 11a of the drive arm 11 to the same direction is realizable by simple specific structure.

  In particular, in the present embodiment, the fixed arm 12 protruding in the radial direction is provided on the rotating shaft 41, and the driving arm 11 is connected to the tip end portion 12 a which is the protruding end of the fixed arm 12 via the support shaft 13 a constituting the joint portion 13. Between the drive arm 11 and the fixed arm 12, a restricting portion 13c that prohibits the drive arm 11 from rotating from a predetermined position in the other direction and allows it to rotate only in one direction is connected between the drive arm 11 and the fixed arm 12. As part of Therefore, the base end portion 12 b of the fixed arm 12 is fixed to the rotating shaft 41, and the drive arm 11 is attached to the distal end portion 12 a that is the protruding end of the fixed arm 12 by the support shaft 13 a, so that the fixed arm 12 and the drive arm 11 are fixed. If the restricting pieces 13c1 and 13c2 are protruded to form the restricting portion 13c, the joint portion 13 can be constituted without using any complicated parts.

  Further, since the projection 11d is provided on the edge located in the other direction of the drive arm 11, and this projection 11d is used as the balance fulcrum n, the balance fulcrum n is supported even if the support portion is a wall surface as in this embodiment. Can be preferentially brought into contact with the support portion over the other parts of the drive arm 11, and the structure becomes simple. In particular, since the protrusion 11d is rounded, even when the balance fulcrum n moves slightly during the balance operation, smooth operation of the balance can be ensured.

  When this embodiment is viewed as the entire latch device, the forward / reverse operating force input to the handle 21 is transmitted to the rotary shaft 41, and the forward / reverse rotation of the rotary shaft 41 is driven by the motion conversion mechanism 1 to drive arm 11. The driving operation of the driving arm 11 is transmitted to the latch 43 via the transmission mechanism 42. As described above, the motion conversion mechanism 1 connects the drive arm 11 to the position displaced in the radial direction from the rotation shaft 41 via the joint portion 13, and converts the rotation operation of the rotation shaft 41 into the operation of the drive arm 11. At this time, when the rotating shaft 41 rotates in one direction, the joint portion 13 does not operate, and the driving arm 11 performs a driving operation that integrally attaches to the rotating shaft 41 and pushes the tip end portion 11a in one direction, When the rotary shaft 41 rotates in the other direction, the joint portion 13 is activated and the drive arm 11 performs a driving operation to push the tip end portion 11a in the one direction while operating to bend from the joint portion 13. . The drive mechanism 11 and the latch 43 are connected by the transmission mechanism 42 so that the release operation of the latch 43 is interlocked with any drive operation of the drive arm 11.

  For this reason, in addition to the operational effects of the motion conversion mechanism 1 described above, the pressing portion is only at one position of the tip end portion 11 a of the drive arm 11, so that the operating rod 42 b that is the starting end portion of the transmission mechanism 42 is connected to the drive arm 11. If it is positioned at the leading end portion 11a, the driving force can be transmitted without giving a special shape to the starting end portion 42b. Therefore, the configuration of the pressing portion and the configuration of the starting end portion of the transmission mechanism 42 can be accurately simplified as compared with the conventional one.

  The driving arm 11 has a balance fulcrum 11d in the middle portion, and when the rotary shaft 41 rotates in the other direction, the balance fulcrum is provided at a support portion provided at a position where the balance fulcrum 11d is prohibited from moving further in the other direction. 11d is brought into contact, and thereafter, the driving operation is performed to push the tip portion 11a in one direction by the balance operation around the balance fulcrum 11d as the joint portion 13 moves in the other direction along with the rotation of the rotary shaft 41. The effect of is already described with respect to the motion conversion mechanism 1.

  Since the support portion uses the inner wall of the end plate 24 which is a hollow box-like housing in which at least the handle 21, the rotating shaft 41, and the drive arm 11 of the latch device 4 are disposed, the position is also strong. In addition, since an appropriate support structure is obtained and only the balance fulcrum n is brought into contact, it is not necessary to introduce a separate support member.

  Further, a fixed arm 12 projecting in the radial direction is provided on the rotary shaft 41, and the drive arm 11 is connected to the projecting end side of the fixed arm 12 via a support shaft 13a constituting the joint portion 13, Between the arm 11 and the fixed arm 12, a restricting portion that prohibits the drive arm 11 from rotating in a different direction from a predetermined position and allows the drive arm 11 to rotate only in one direction is provided as a part of the joint portion 13. The effect of the above has already been described with respect to the motion conversion mechanism 1.

  In particular, with the configuration as described above, the fixed arm 12, the drive arm 11, and the restricting portion 13c can be unitized. If the shaft hole 12b1 of the fixed arm 12 is attached to the rotary shaft 41 so as to be integrally rotatable, the operation conversion is performed. Since most parts necessary for the mechanism 1 can be attached, the main components of the motion conversion mechanism 1 can be handled integrally, and the convenience of attachment to the rotary shaft 41 is greatly improved. be able to.

  The effect of providing the protrusion 11d for providing the balance fulcrum n at the edge located in the other direction of the drive arm 11 has already been described with respect to the motion conversion mechanism 1.

  The transmission mechanism 42 further includes a transmission shaft 42a arranged in a posture intersecting with the rotation shaft 41, and extends so as to intersect with the transmission shaft 42a and be parallel to the rotation shaft 41, and rotates together with the transmission shaft 42a. The operating rod 42b is provided, and the operating rod 42b is urged by the operation in which the distal end portion 11a of the drive arm 11 is pushed out in one direction to rotate the transmission shaft 42a. For this reason, only one place of the tip 11a of the driving arm 11 is required for the pressing portion, which is simpler than that of the conventional example, and the operating rod 42b which is the starting end of the transmission mechanism 42 is connected to the tip of the driving arm 11. If it is positioned at 11a, it is possible to transmit the driving force to the starting end portion without giving a special shape like the contact body of the conventional example. Therefore, this part can be configured simply and compactly.

  The transmission mechanism 42 includes a transmission shaft 42a arranged in a posture intersecting with the rotation shaft 41, and a link 42c provided so as to be integrally rotatable around the transmission shaft 42a. A portion displaced from the shaft 43b of the latch 43 attached around the shaft 43b parallel to the transmission shaft 42a is driven. In other words, the latch 43 is not driven directly by the transmission shaft as in the conventional example, but the latch 43 is driven through the link 42c. The structure which takes out the latch 43 by the body 43a can be easily dealt with. For this reason, the operation of the latch 43 can be reduced as compared with the case where the entire latch is moved like a sickle, thereby improving the accuracy of the mooring with respect to the latch receiver and reducing the rattling. The opening can be made as small as possible to avoid strength reduction.

  When the present embodiment is viewed as a whole, a spring 42f is provided as a biasing means for applying a preload in a direction in which the latch 43 is engaged with the latch receiver 44, and the operating force input to the handle 21 is the rotating shaft 41, the drive arm. 11 and the transmission mechanism 42 cause the latch 43 to move against the spring 42f in the direction of disengagement from the latch receiver 44, and when the operating force disappears, the spring 42f engages the latch 43 with the latch receiver 44. At the same time, it is configured to cause an operation of offsetting the handle 21 to the neutral position via the transmission mechanism 42, the drive arm 11 and the rotating shaft 41, so that the operating rod 42 b disposed in the middle is placed on the distal end portion 11 a of the drive arm 11. It is possible to simply configure a transmission system with little transmission delay or play between the handle 21 and the latch 43 by elastic contact.

  And this embodiment is provided with the storage furniture main body 31 and the drawer 2 which is a movable part movable with respect to the storage furniture main body 31, and in order to moor the drawer 2 at a predetermined position of the storage furniture main body 31. The handle 21, the rotary shaft 41, the motion conversion mechanism 1, the transmission mechanism 42 and the latch 43 constituting the latch device 4 are arranged in the drawer 2 which is a movable part, and the latch receiver 44 is arranged in the storage furniture main body 31 to store the furniture 3. Can be suitably configured.

  In particular, since the motion conversion mechanism 1 is compact as described above, even if the end plate 24 is thin, the handle 21 is disposed on the front surface of the end plate 24, and the rotary shaft 41, the operation is operated in the hollow portion of the end plate 24. The transmission shaft 42a and the operating rod 42b of the conversion mechanism 1 and the transmission mechanism 42 are effectively arranged, the latch 43 is protruded from the end plate 24, and the latch 43 is attached to the latch receiver 44 provided at the latch corresponding position of the storage furniture body 31. It becomes possible to engage suitably.

  The specific configuration of each unit is not limited to the above-described embodiment.

  For example, as shown in FIG. 9, a boss portion 12 bx around the shaft hole 12 b 1 used when the fixed arm 12 is attached to the rotating shaft 41 may be pivotally supported by a bearing 41 b provided in the case 100. In this case, if the fixed arm 12 and the driving arm 11 are incorporated in the case 100 and can be covered with a cover (not shown), unitization can be further promoted.

  In the latch device 4 of the above embodiment, the latch 43 is attached to the vertical shaft 42a. However, the latch is attached to the horizontal shaft and engaged with the storage furniture body using the vertical movement. It can also be configured.

  In addition, since the latch device 4 of the above embodiment is for mooring the drawer 2 to the storage furniture main body 31, the latch device 4 can be moored to the wagon main body, or the desk drawer can be moored to the desk main body. The same can be applied. Alternatively, the latch device of the present invention can also be used when a single door or a double door is moored at a position where the opening of the storage furniture body is closed.

  Furthermore, the motion conversion mechanism of the present invention can be used for the purpose of transmitting the input in the forward and reverse directions applied to the input end other than the handle to the output end other than the latch so as to make the output in the same direction.

  Further, the motion conversion mechanism 1 can also be used so as to directly drive the driving object by the driving arm 11, and in this case, the transmission mechanism is unnecessary. For example, with respect to a driving object that operates when the pressing element is pressed, the tip of the driving arm may be positioned at a position where the pressing element can be directly pressed. For example, if it is a counter provided with a pressing element, the utilization mode etc. which count the frequency | count of operation applied to an input terminal regardless of forward / reverse are possible.

  Furthermore, in the above-described embodiment, the balance fulcrum n constituting the joint portion 13c of the motion conversion mechanism 1 operates using the inner wall of the back plate 24b of the end plate 24 as a support portion. When using a case that covers these arms 11 and 12 with the rotary shaft 41 attached to the rotary shaft 41, the balance fulcrum n directly contacts the back plate 24b of the end plate 24 using the inner wall of the case as a support portion. It is also possible to take a configuration that avoids this.

  In addition, the operation of the indirect portion of the motion conversion mechanism is not limited to using a balance operation, and a wire, a simple gear train, or the like is used, and the intended operation of the present invention can be performed by itself without depending on the support portion. It can also be configured as follows.

  Other configurations can be variously modified without departing from the spirit of the present invention.

The perspective view of the storage furniture which concerns on one Embodiment of this invention. The typical partial top view. The partial expansion perspective view which shows the handle used in the embodiment. The partial expansion perspective view which expands and shows the operation | movement conversion mechanism in the embodiment. The exploded view of FIG. Action | operation explanatory drawing of the same embodiment. Action | operation explanatory drawing of the same embodiment. Action | operation explanatory drawing of the same embodiment. The partial expansion perspective view which shows the modification of this invention.

Explanation of symbols

1 ... Motion conversion mechanism 2 ... Movable body (drawer)
DESCRIPTION OF SYMBOLS 3 ... Storage furniture 4 ... Latch apparatus 11 ... Drive arm 11a ... Tip part 11d ... Protrusion 12 ... Fixed arm 13 ... Joint part 13a ... Support shaft 13b ... Shaft hole 13c ... Restriction part 21 ... Input end (grip)
24 ... Case (end plate)
DESCRIPTION OF SYMBOLS 31 ... Storage furniture main body 41 ... Rotating shaft 42a ... Transmission shaft 42b ... Actuation rod 42c ... Link 42d ... Long hole 42e ... Pin 42f ... Biasing means (spring)
43 ... Output terminal (latch)
44 ... Latch receiver n ... Balance fulcrum

Claims (19)

A drive arm is connected to the position displaced in the radial direction from the rotation shaft via a joint, and the rotation operation of the rotation shaft is converted into the drive operation of the drive arm.
When the rotating shaft rotates in one direction, the joint does not operate and the drive arm is attached to the rotating shaft integrally to drive the tip portion in one direction, and the rotating shaft rotates in the other direction. When the joint portion is actuated, the drive arm operates to bend from the joint portion while performing a drive operation to push the tip portion in the one direction ,
Providing a balance fulcrum at the edge located in the other direction of the drive arm in the intermediate part between the indirect part and the tip part,
When the rotary shaft rotates in the other direction, the protrusion is brought into contact with a support portion provided at a position where the balance fulcrum is prohibited from further moving in the other direction. An operation conversion mechanism that performs a driving operation to push the tip portion in one direction by a balance operation around the balance fulcrum as it moves in the other direction . A fixed arm that protrudes in the radial direction is provided on the rotating shaft, and a driving arm is connected to a protruding end side of the fixed arm via a support shaft that constitutes a joint portion. Between the driving arm and the fixed arm, drive arm motion conversion mechanism of which claim 1 provided with a restricting portion for allowing the rotation only in one direction is prohibited from rotating in the other direction from the predetermined position as part of the joint. The motion conversion according to claim 1, wherein the support portion uses an inner wall of a hollow box-shaped housing in which the rotating shaft and the driving arm are disposed, or an inner wall of a case covering the driving arm. mechanism. The motion conversion mechanism according to claim 1, wherein the protrusion is rounded . The forward / reverse input applied to the input end is transmitted to the rotation shaft, and the forward / reverse rotation of the rotation shaft is converted into a drive operation in one direction by the operation conversion mechanism, and the tip of the drive arm The drive object is directly driven by the part,
The motion conversion mechanism connects the drive arm via the joint at a position displaced in the radial direction from the rotation shaft, and converts the rotation motion of the rotation shaft into the motion of the drive arm. Does not actuate the joint, and the drive arm is integrally attached to the rotating shaft to drive the tip in one direction, and when the rotating shaft rotates in the other direction, the joint is actuated The driving arm performs a driving operation that pushes the tip portion in the one direction while operating to bend from the joint portion, and is positioned in the other direction of the driving arm at an intermediate portion between the indirect portion and the tip portion. A protrusion for providing a balance fulcrum is provided at the edge of the balance, and when the rotation shaft rotates in the other direction, the protrusion is applied to a support provided at a position that prohibits further movement of the balance fulcrum in the other direction. After that, the joint part turns the rotation axis. With a mechanism for driving operation of Seridasa the tip in one direction by the balance behavior of the balance fulcrum with the movement in the other direction,
A drive device configured to obtain a drive output at a distal end portion of the drive arm. Forward / reverse input applied to the input end is transmitted to the rotating shaft, and the forward / reverse rotation of the rotating shaft is converted into a driving motion in one direction by the motion conversion mechanism to drive the driving arm. The movement is transmitted to the output end via the transmission mechanism,
The motion conversion mechanism connects the drive arm via the joint at a position displaced in the radial direction from the rotation shaft, and converts the rotation motion of the rotation shaft into the motion of the drive arm. Does not actuate the joint, and the drive arm is integrally attached to the rotating shaft to drive the tip in one direction, and when the rotating shaft rotates in the other direction, the joint is actuated The driving arm performs a driving operation that pushes the tip portion in the one direction while operating to bend from the joint portion, and is positioned in the other direction of the driving arm at an intermediate portion between the indirect portion and the tip portion. A protrusion for providing a balance fulcrum is provided at the edge of the balance, and when the rotation shaft rotates in the other direction, the protrusion is applied to a support provided at a position that prohibits further movement of the balance fulcrum in the other direction. After that, the joint part turns the rotation axis. With a mechanism for driving operation of Seridasa the tip in one direction by the balance behavior of the balance fulcrum with the movement in the other direction,
The transmission mechanism is a drive device that connects the drive arm and the output end so that the output operation of the output end is interlocked with the drive operation of the drive arm. A fixed arm that protrudes in the radial direction is provided on the rotating shaft, and a driving arm is connected to a protruding end side of the fixed arm via a support shaft that constitutes a joint portion. Between the driving arm and the fixed arm, The drive device according to claim 5 or 6, wherein a restricting portion that prohibits the drive arm from rotating in a different direction from a predetermined position and allows the drive arm to rotate only in one direction is provided as a part of the joint portion. The said support part utilizes the inner wall of the hollow box-shaped housing | casing by which the said rotating shaft and the said drive arm are arrange | positioned, or the inner wall of the case which covers a drive arm. Drive device. The driving device according to claim 5, wherein the protrusion is rounded . The operating force in the forward / reverse direction input to the handle is transmitted to the rotating shaft, and the forward / reverse rotation of the rotating shaft is converted into a driving motion in one direction of the driving arm by the motion converting mechanism. The drive operation is transmitted to the latch through the transmission mechanism,
The motion conversion mechanism connects the drive arm via the joint at a position displaced in the radial direction from the rotation shaft, and converts the rotation motion of the rotation shaft into the motion of the drive arm. Does not actuate the joint, and the drive arm is integrally attached to the rotating shaft to drive the tip in one direction, and when the rotating shaft rotates in the other direction, the joint is actuated The drive arm performs a drive operation that pushes the tip part in the one direction while operating to bend from the joint part, and is positioned in the other direction of the drive arm at an intermediate part between the indirect part and the tip part. A protrusion for providing a balance fulcrum is provided at the edge of the balance, and when the rotation shaft rotates in the other direction, the protrusion is applied to a support provided at a position that prohibits further movement of the balance fulcrum in the other direction. After that, the joint part turns the rotation axis. With a mechanism for driving operation of Seridasa the tip in one direction by the balance behavior of the balance fulcrum with the movement in the other direction,
The transmission mechanism is a latch device that connects the drive arm and the latch so that the latch release operation is interlocked with any drive operation of the drive arm. Support part, at least the handle of the latch device, the inner wall of the rotary shaft and the hollow box-shaped casing which drive arm is arranged or, according to claim 10, wherein is obtained by utilizing the inner wall of the case which covers the drive arm Latch device. A fixed arm that protrudes in the radial direction is provided on the rotating shaft, and a driving arm is connected to a protruding end side of the fixed arm via a support shaft that constitutes a joint portion. Between the driving arm and the fixed arm, The latch device according to claim 10 or 11, wherein a restricting portion that prohibits the drive arm from rotating in a different direction from a predetermined position and allows the drive arm to rotate only in one direction is provided as a part of the joint portion. The latch device according to claim 12 , wherein the fixed arm, the drive arm, and the restricting portion are unitized, and a shaft hole for attaching the fixed arm to the rotating shaft so as to be integrally rotatable is provided on a proximal end side of the fixed arm. The latch device according to claim 10, 11, 12, or 13, wherein the protrusion is rounded . The transmission mechanism includes a transmission shaft arranged in a posture intersecting with the rotation shaft, and an operating rod extending so as to intersect with the transmission shaft and parallel to the rotation shaft and rotatable with the transmission shaft. The latch device according to claim 10, 11, 12, 13 or 14 , wherein the driving shaft is urged in one direction to urge the operating rod to rotate the transmission shaft. The transmission mechanism includes a transmission shaft arranged in a posture intersecting with the rotation shaft, and a link provided so as to be integrally rotatable around the transmission shaft, and around the axis parallel to the transmission shaft on the distal end side of the link. The latch device according to claim 10, 11, 12, 13, 14 or 15 , wherein a portion displaced from the shaft of the latch attached to the shaft is driven. A biasing means for preloading the latch in a direction for engaging the latch with the latch receiver is provided, and the operating force input to the handle is opposed to the biasing means via the rotating shaft, the drive arm and the transmission mechanism. When the operating force disappears, the biasing means engages the latch with the latch receiver and simultaneously offsets the handle to the neutral position via the transmission mechanism, the drive arm and the rotating shaft. 17. A latching device according to claim 10, 11, 12, 13, 14, 15 or 16 . A furniture configured using the latch device according to claim 10, 11, 12, 13, 14, 15 , 16 or 17 , comprising a furniture body and a movable part movable relative to the furniture body, In order to moor the movable part at a predetermined position of the furniture body, a handle, a rotation shaft, a motion conversion mechanism, a transmission mechanism and a latch constituting the latch device are arranged in the movable part, and a latch receiver is arranged in the furniture body. furniture. The furniture body includes a storage space that opens forward, and the movable portion includes a hollow box-shaped casing disposed at a position that opens and closes the storage space,
A handle is arranged on the front surface of the housing, a rotating shaft, a motion conversion mechanism, and at least a part of the transmission mechanism are arranged in the hollow portion of the housing, and a latch protrudes from the housing and latches at a latch-corresponding position on the furniture body. The furniture according to claim 18, further comprising a receptacle.

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