WO2017123528A1 - Panel attachment latch - Google Patents

Panel attachment latch Download PDF

Info

Publication number
WO2017123528A1
WO2017123528A1 PCT/US2017/012812 US2017012812W WO2017123528A1 WO 2017123528 A1 WO2017123528 A1 WO 2017123528A1 US 2017012812 W US2017012812 W US 2017012812W WO 2017123528 A1 WO2017123528 A1 WO 2017123528A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
actuator
pawl
electrical connector
latch assembly
Prior art date
Application number
PCT/US2017/012812
Other languages
French (fr)
Inventor
Chuanjun Li
Fabrice Vitry
Original Assignee
Southco, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southco, Inc. filed Critical Southco, Inc.
Priority to CN201780016964.7A priority Critical patent/CN108780623B/en
Publication of WO2017123528A1 publication Critical patent/WO2017123528A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/10—Hook fastenings; Fastenings in which a link engages a fixed hook-like member
    • E05C19/12—Hook fastenings; Fastenings in which a link engages a fixed hook-like member pivotally mounted around an axis
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/627—Snap or like fastening
    • H01R13/6275—Latching arms not integral with the housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
    • H01R13/62933—Comprising exclusively pivoting lever
    • H01R13/62944—Pivoting lever comprising gear teeth
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/006—Locks or fastenings for special use for covers or panels

Definitions

  • the present invention relates to the field of latch assemblies configured to provide a mechanical and/or electrical connection between adjacent components, such as a system of display panels.
  • Panel latches such as draw latches, typically include a catch and a keeper that are independently coupled to separate panels. The panels may then be secured to one another by latching the catch onto the keeper.
  • an electrical connection in addition to a mechanical connection may be desired in certain applications, such as systems that include a plurality of video display panels, so that the video display panels may be combined and are able to communicate electronically to form a single large display.
  • Such displays are commonly used as part of the staging for concert events and joining and locking the panels together often presents a challenge.
  • the panels are generally heavy and difficult to maintain in place while a user fastens the panels together with a tool, which may also present a safety hazard.
  • the use of standard fasteners and tools to unlock a single panel may be time consuming and therefore inconvenient or could damage the panels.
  • a latch assembly configured for engaging and disengaging a component mechanically and electrically relative to an adjacent component.
  • the latch assembly comprises an electrical connector, a pawl, and an actuator.
  • the electrical connector may be configured for engagement with an adjacent electrical connector coupled to the adjacent
  • the actuator may be movable relative to the component between first and second positions, the actuator being coupled to the electrical connector and to the pawl such that movement of the actuator relative to the component moves the electrical connector and the pawl along the path. Movement of the actuator relative to the component from the first position to the second position may move the electrical connector in a direction along the path and move the pawl in an opposite direction along the path. Furthermore, movement of the actuator relative to the component from the first position to the second position may move the electrical connector a first distance along the path and move the pawl a second distance along the path, the first distance being different from the second distance.
  • a latch assembly configured for engaging and disengaging a component relative to an adjacent component.
  • the latch assembly comprises a pawl, an actuator, and a shaft.
  • the pawl may be movable relative to the component and configured for engagement of a keeper coupled to the adjacent component, the pawl being movable relative to the component along a path.
  • the actuator may be movable relative to the component between first and second positions, the actuator being coupled to the pawl such that movement of the actuator relative to the component moves the pawl along the path.
  • the shaft may define an axis about which the actuator is mounted for rotation, the shaft being oriented such that the axis is parallel to the path.
  • a component assembly configured for releasable engagement with second and third component assemblies.
  • the component assembly may comprise a component, a first latch assembly, and a second latch assembly.
  • the component may have plural sides at least one of which is positionable adjacent the second or third component assembly.
  • the first latch assembly may be mounted to one of the sides of the component and configured for engaging and disengaging the component mechanically and electrically relative to the second or third component assembly.
  • the first latch assembly may include an electrical connector, a pawl, and an actuator.
  • the electrical connector may be coupled to the component and configured for engagement with an adjacent electrical connector coupled to the second or third component assembly.
  • the electrical connector may be movable relative to the component along a first path.
  • the pawl may be coupled to the component and configured for engagement of a keeper coupled to the second or third component assembly.
  • the pawl may be movable relative to the component along the first linear path.
  • the actuator may be coupled to the component and movable relative to the component between first and second positions and may be coupled to the electrical connector and to the pawl such that movement of the actuator relative to the component moves the electrical connector and the pawl along the first linear path. Movement of the actuator relative to the component from the first position to the second position may move the electrical connector a first distance in a direction along the first linear path and move the pawl a second distance in an opposite direction along the first linear path, the first distance being different from the second distance.
  • the second latch assembly may be configured for engaging and disengaging the component relative to the second or third component assembly.
  • the latch assembly may include a pawl, an actuator, and a shaft.
  • the pawl may be coupled to the component and configured for engagement of a keeper coupled to the second or third component assembly.
  • the pawl may be movable relative to the component along a second linear path.
  • the actuator may be coupled to the component and movable relative to the component between first and second positions and may be coupled to the pawl such that movement of the actuator of the second latch relative to the component moves the pawl along the second linear path.
  • the shaft may define an axis about which the actuator of the second latch is mounted for rotation and oriented such that the axis is transverse to the second linear path.
  • a system of component assemblies configured for releasable engagement to one another.
  • the system may comprise a plurality of component assemblies each having a
  • the electrical connector may be movable relative to the component in a direction along a linear path and the pawl may be movable relative to the component in an opposite direction along the linear path. Movement of the actuator relative to the component from a first position to a second position may move the electrical connector a first distance in a direction along the linear path and move the pawl a second distance in an opposite direction along the linear path, the first distance being different from the second distance.
  • Figure 1 is an exploded view of a first embodiment of a panel attachment latch according to the present invention ;
  • Figure 2A is front view of the first embodiment of the panel attachment latch
  • Figure 2B is a bottom view of the panel attachment latch of Figure 2A;
  • Figure 2C is a left side view of the panel attachment latch of Figure 2A;
  • Figure 3A is a right side cross-sectional view of the panel attachment latch of Figure 2A along axis 3A-3A;
  • Figure 3B is a right side cross-sectional view of the panel attachment latch of Figure 2A along axis 3B-3B;
  • Figure 3C is a right side cross-sectional view of the panel attachment latch of Figure 2A along axis 3C-3C;
  • Figure 4 is an exploded view of a second embodiment of a panel attachment latch according to the present invention.
  • Figure 5A is a front view of the second embodiment of the panel attachment latch
  • Figure 5B is a right side view of the panel attachment latch of Figure 5A;
  • Figure 6A is a bottom cross-sectional view of the panel attachment latch of Figure 5A along axis 6A-6A;
  • Figure 6B is a top cross-sectional view of the panel attachment latch of Figure 5A along axis 6B-6B;
  • Figure 6C is a left side cross-sectional view of the panel attachment latch of Figure 5A along axis 6C-6C;
  • Figure 6D is a right side cross-sectional view of the panel attachment latch of Figure 5A along axis 6D-6D;
  • Figure 7A is a front view of a plurality of panels in combination with latches according to the present invention in the unlocked condition
  • Figure 7B is a front view of the plurality of panels and latches of Figure 7A in the locked condition.
  • a latch assembly configured for engaging and disengaging a component mechanically and/or electrically relative to an adjacent component is provided, as well as a component assembly and a system comprising a plurality of component assemblies.
  • the component assemblies may include a component and one or more latch assemblies.
  • the component may in some applications include a frame 201, 202, 203, 204 for a video display panel. Such a component would require both a mechanical connection and an electrical connection, so that the components may be combined physically and electrically connected into an array for a large video display, for example.
  • a combination of mechanical latch assemblies and dual mechanical/electric latch assemblies may be included on specific locations in various sections of the panels.
  • the mechanical/electric latches 212a, b, 216a, b may be located within the horizontal sections between adjacent rectangular-shaped panels arranged in a column, such as panels 201 and 203. In locations where electrical connections are not needed, only a mechanical latch assembly may be installed, such as the latch assemblies 210a, b, 214a, b in the vertical sections of adjacent panels arranged in a row, such as panels 201 and 202.
  • the latch assemblies include one portion containing a keeper and a second portion containing an actuated pawl.
  • the latch assemblies may be installed across adjacent components, such that the keeper portion is installed on one component and the actuated pawl portion is installed on the adjacent component.
  • the actuator may be in the form of a handle, such as actuators 211, 213, 215, 217, that may be easily rotated with one hand to actuate the pawls and capture the corresponding keepers and optionally join the electrical connectors after a single action of rotating the actuator through a relatively short arc. Therefore, embodiments of the present invention provide a relatively quick and easy way to connect and disconnect component assemblies within a system, thereby avoiding the use of separate fasteners and tools that may become lost or broken and may be more difficult and time consuming to apply and remove.
  • the latch assembly comprises an electrical connector 18, a pawl 20a, 20b, and an actuator 14 that may be in the form of a handle, for example.
  • the electrical connector 18 may be coupled to the component and configured for engagement with an adjacent electrical connector 16 coupled to the adjacent component, the electrical connector 18 being movable relative to the component along a path.
  • the pawl 20a, 20b such as a catch, may be movable relative to the component and configured for engagement of a keeper 22a, 22b, such as a striker or bolt, coupled to the adjacent component, the pawl 20a, 20b being movable relative to the component along the path.
  • the actuator 14 may be movable relative to the component between first and second positions, the actuator 14 being coupled to the electrical connector 18 and to the pawl 20a, 20b, such that movement of the actuator 14 relative to the component moves the electrical connector 18, and the pawl 20a, 20b along the path. Movement of the actuator 14 relative to the component from the first position to the second position may move the electrical connector 18 a first distance in a direction along the path and move the pawl 20a, 20b in an opposite direction along the path, the first distance being different from the second distance.
  • the latch assembly may further comprise a carriage 46 that may be movable relative to the component along the linear path.
  • the electrical connector 18 may be coupled to the carriage 46 for movement with the carriage 46.
  • the latch assembly may also further comprise a plurality of pawls 20a, 20b configured for engagement of one or more keepers 22a, 22b coupled to the adjacent component, a plurality of electrical connectors 18 configured for engagement with one or more adjacent electrical connectors 16 coupled to the adjacent component, and a gear linkage, such as beveled gears 26a, 26b, 28a, 28b and rotary gears 126a, 126b, 128a, 128b coupling the actuator 14 to the pawl 20a, 20b or a gear linkage, such as a rack-and- pinion gear 54, 50, coupling the actuator 14 to the electrical connector 18.
  • the latch assembly may further comprise a shaft 24, 124 defining an axis about which the actuator 14 is mounted for rotation.
  • the shaft 24, 124 may be oriented such that the axis is either transverse or perpendicular to the linear path, and the actuator may be mounted for rotation about the axis 90 degrees from the first position to the second position.
  • the actuator 14 may also be selectively locked to prevent movement of the actuator 14.
  • the pawl 120a, 120b may be movable relative to the component and configured for engagement of a keeper 122a, 122b may be coupled to the adjacent component, the pawl 120a, 120b being movable relative to the component along a path.
  • the actuator 114 may be movable relative to the component between first and second positions, the actuator 114 being coupled to the pawl 120a, 120b such that movement of the actuator 114 relative to the component moves the pawl 120a, 120b along the path.
  • the shaft 124 may define an axis about which the actuator 114 is mounted for rotation, wherein the axis is either parallel or perpendicular to the linear path.
  • a component assembly configured for releasable engagement with second and third component assemblies.
  • a plurality of component assemblies may also be combined to provide a system.
  • the component assembly comprises a component 204 having plural sides at least one of which is positionable adjacent the second or third component assembly.
  • the component assembly further comprises a first and second latch assembly.
  • the first latch assembly 212a may be mounted to one of the sides of the component and configured for engaging and disengaging the component mechanically and electrically relative to the second or third component assembly.
  • the first latch assembly may include an electrical connector 18, a pawl 20a, 20b, and an actuator 14.
  • the electrical connector 18 may be configured for engagement with an adjacent electrical connector 16 coupled to the second or third component assembly, the electrical connector 18 being movable relative to the component 204 along a first path.
  • the pawl 20a, 20b may be configured for engagement of a keeper 22a, 22b coupled to the second or third component assembly, the pawl 20a, 20b being movable relative to the
  • the actuator 14 may be movable relative to the component 204 between first and second positions and may be coupled to the electrical connector 18 and to the pawl 20a, 20b such that movement of the actuator 14 relative to the component 204 moves the electrical connector 18 and the pawl 20a, 20b along the first linear path. Movement of the actuator 14 relative to the component 204 from the first position to the second position moves the electrical connector 14 a first distance in a direction along the first linear path and moves the pawl 20a, 20b a second distance in an opposite direction along the first linear path, the first distance being different from the second distance.
  • the second latch assembly may be configured for engaging and disengaging the component 204 relative to the second or third component assembly and include a pawl 120a, 120b, an actuator 114, and a shaft 124.
  • the pawl 120a, 120b may be configured for engagement of a keeper 122a, 122b coupled to the second or third component assembly and movable relative to the component 204 along a second linear path .
  • the actuator 114 may be movable relative to the component between first and second positions and coupled to the pawl 120a, 120b such that movement of the actuator 114 of the second latch relative to the component 204 moves the pawl 120a, 120b along the second linear path.
  • the shaft 124 may define an axis about which the actuator 114 of the second latch is mounted for rotation, the shaft 124 being oriented such that the axis is parallel to the second linear path.
  • the latch assembly includes a keeper housing 12 and a main housing 10.
  • the keeper housing 12 includes one or more keepers 22a, 22b, such as a striker or a bolt, as well as a female electrical connector 16.
  • the keeper housing 12 may also include a cover piece 37 to assist in maintaining the female connector 16 in place.
  • the main housing 10 includes one or more pawls 20a, 20b that may be in the form a hook-shaped catch, for example, for interacting with the keepers 22a, 22b, as well as a male electrical connector 18.
  • main housing 10 may include a cover plate 38 to maintain the male connector 18 in position.
  • the male and female connectors may be reversed, such that the male portion is in the keeper housing and the female portion is in the main housing .
  • the keeper housing 12 and main housing 10 may be coupled to respective panels, such as the panel assemblies illustrated in Figures 7A and 7B, which will be described in greater detail below.
  • the main housing 10 further comprises an actuator that includes, for example, an actuator 14 that is operatively connected to the pawls 20a, 20b via a gear train and the male electrical connector 18 via a rack-and- pinion gear in order to actuate the latch by rotating the actuator 14.
  • the actuator 14 includes a gripping portion 56 on one end of the actuator 14 and a main body portion 58 on an opposing end of the actuator 14.
  • An actuator gear 54 configured for rotation with the actuator 14 is located on or adjacent to an outer surface of the main body 58. In one embodiment, the actuator gear may be integrally formed in the main body portion 58.
  • axle 24 is inserted through the main body portion 58 of the actuator 14 and the center of actuator gear 54, so that the actuator 14 is rotatably mounted within the main housing 10.
  • the ends of the axle 24 may be include a retaining means, such as C-clips 40a, 40b, to prevent the axle from sliding longitudinally within the main housing 10.
  • the actuator gear 54 and the actuator 14 are preferably configured to rotate with the axle 24 during actuation of the latch, preferably about 90 degrees, from a first starting position to a second final position.
  • a pin 42b may be transversely inserted through the axle 24 and mounted in a coplanar fashion within the integral actuator gear 54.
  • the male electrical connector 18 may be coupled to a carriage 46 that is able to move along a substantially linear path in response to rotational movement of the actuator 14.
  • the male electrical connector 18 may be positioned between brackets 48a, 48b in an area that is adjacent to a leading edge of the carriage 46.
  • the male connector 18 may optionally be held in place using a cover plate 38.
  • the carriage 46 may be slidably mounted to the underside of the main housing 10 and optionally include a rack portion 50 that engages the teeth of the actuator gear 54 to convert the rotational motion of the actuator gear 54 into linear motion of the carriage 46.
  • downward force applied to the actuator 14 causes counter-clockwise rotation of the actuator gear 54 and in turn an upward vertical movement of the rack 50, carriage 46, and male connector 18, so that the male connector 18 travels a first distance to mate with the corresponding female electrical connector 16 in the keeper housing 12.
  • actuation of the latch mechanism may simultaneously actuate the pawls with the electrical connector.
  • opposing ends of the axle 24 may also include a beveled gear 26a, 26b on opposing ends of the axle 24.
  • pins 42a, 42c may be transversely inserted in the axle 24 and inserted in the bevel gears 26a, 26b in a coplanar fashion, so that the bevel gears 26a, 26b rotate with the axle 24 and the actuator 14.
  • Each of the bevel gears 26a, 26b may engage a corresponding nut gear 28a, 28b that is oriented perpendicular to the bevel gears 26a, 26b.
  • Each of the nut gears 28a, 28b may include internal threading to engage a screw 30a, 30b.
  • the threading may preferably have a square cross-section to maintain a locked condition under excess force and to prevent or inhibit wear so that the latch assembly does not loosen in the locked condition over time.
  • the screws 30a, 30b are each inserted through a channel in the main housing 10 and include at least one face to prevent rotation of the screws 30a, 30b within their respective channels.
  • the screws 30a, 30b may have a neck portion having a square-shaped cross-section to prevent rotation in the main housing 10.
  • the bevel gears 26a, 26b rotate with the actuator 14 which in turn causes rotation of the nut gears 30a, 30b.
  • the nut gear 28b may be held in place between the bevel gear 26b and an internal face 27 of the main housing 10, such that rotating the nut gear 28b will translate into linear motion of the screw 30b.
  • the beveled gears 26a, 26b are positioned, such that the teeth of the beveled gears 26a, 26b are facing away from each other, and applying a downward force to the actuator 14 will cause the nut gears 28a, 28b to rotate in opposite directions.
  • the threading of the right screw 30a and right nut gear 28a may be wound in the opposite direction than the threading of the left screw 30b and nut gear 28b, so that the screws 30a, 30b move linearly in a common direction.
  • Each of the screws 30a, 30b may have a head portion with a bore that may be aligned with a corresponding bore in the pawls 20a, 20b.
  • Each screw 30a, 30b may then be coupled to a pawl 20a, 20b, for example, by inserting a pin 32a, 32b, such as a linchpin or a cotter pin, through the bores.
  • a biasing means such as a coil spring 36a, 36b, may also be positioned on the pins 32a, 32b, so that the pawls 20a, 20b are biased to rotate away from the keepers 22a, 22b.
  • a follower such as a guide pin 34a, 34b, may be provided on each of the pawls 20b, 20b and configured to interact with a cam surface, such as a curved surface 50a, 50b on the brackets 48a, 48b.
  • the screws 30a, 30b retract linearly in a direction opposite to the movement of the carriage 46 causing the guide pins 34a, 34b to ride along a respective curved surface 50a, 50b causing each of the pawls 20b, 20b to rotate about pins 32a, 32b until the pawls 20a, 20b contact the keepers 22a, 22b and no longer rotate.
  • the actuator 14 may optionally include a safety feature to prevent rotation towards the unlocked position.
  • the actuator 14 may have a hollow main body portion 58 that houses a locking lever 62 on a fulcrum pin 63.
  • a biasing means 70 such as a coil spring, may also be located on the fulcrum pin 63 for biasing the locking lever 62.
  • One end of the locking lever 62 may include a button 66 that protrudes through an opening 68 near the gripping portion 56 of the actuator 14, while the opposite end of the locking lever 62 includes a toothed portion 65.
  • the hollow main body portion 58 of the actuator 14 may also house a stationary gear 60, and the locking lever 62 may be biased, such that the toothed portion 65 of the locking lever 62 engages the stationary gear 60.
  • the stationary gear 60 may be held in place by a stationary gear bracket 74 within the main housing 10, so that the stationary gear 60 maintains the same position as the actuator 14 rotates.
  • the axle 24 may be inserted through and configured to rotate within the approximate center of the stationary gear 60 and the stationary gear bracket 74.
  • An actuator cover 64 attached to the actuator 14 with a plurality of fasteners, such as screws 72a, 72b, and 72c, may be used to close the hollow main body portion 58.
  • the teeth on the stationary gear 60 and/or the toothed portion 65 of the locking lever 62 may be configured, such that depression of the button 68 is not necessary to rotate the actuator 14 to the locked position, as illustrated in Figure 3B. However, in order for a user to rotate the actuator 14 from the locked position of Figure 3B to an unlocked position, the button 66 must be depressed to disengage the toothed portion 65 of the locking lever 62 from the stationary gear 60. This prevents undesired rotation of the actuator to the unlocked position.
  • the latch assembly includes a keeper housing 112 and a main housing 110.
  • the keeper housing 112 includes one or more keepers 122a, 122b, such as a striker or a bolt.
  • the main housing 110 includes one or more pawls 120a, 120b for interacting with the keepers 122a, 122b.
  • the keeper housing 112 and main housing 110 may be coupled to respective panels, such as the panel assemblies illustrated in Figures 7A and 7B, which will be described in greater detail below.
  • the main housing 110 further comprises an actuator 114 that may be in the form of a handle, for example, and is operatively connected to the pawls 120a, 120b via a gear train.
  • the actuator 114 includes a gripping portion 156 on one end of the actuator 114 and a main body portion 158 on an opposing end of the actuator 114.
  • An actuator gear 154 configured for rotation with the actuator 114 is located on or adjacent to an outer surface of the main body 158.
  • the actuator gear may be integrally formed in the main body portion 158.
  • a primary axle 124 is inserted through the main body portion 158 of the actuator 114 and the center of actuator gear 154, so that the actuator 114 is rotatably mounted within the main housing 110.
  • At least one end of the axle 124 may be include a retaining means, such as a C-clip 140b, to prevent the primary axle 124 from sliding longitudinally within the main housing 110.
  • the gear train may further comprise auxiliary gears 126a, 126b that rotate about respective auxiliary axles 144a, 144b having longitudinal axes that are
  • the auxiliary axles 144a, 144b may also include retaining means, such as C-clips 140a, 140c, to prevent the auxiliary axles 144a, 144b from sliding longitudinally within the main housing 110.
  • Each of the auxiliary gears 126a, 126b have teeth that engage the actuator gear 154 and a respective nut gear 128a, 128b that, like the auxiliary gears 126a, 126b, are oriented to rotate about an axis that is parallel to the axis of rotation of the actuator gear 154.
  • the nut gears 128a, 128b rotate in the same direction as the actuator gear 154, while the auxiliary gears 144a, 144b rotate in the opposite direction as the actuator 114 is rotated from an unlocked to a locked position.
  • Each of the nut gears 128a, 128b may include internal threading to engage a screw 130a, 130b. Because the nut gears 128a, 128b rotate in the same direction, the threading of the screws 130a, 130b and the nut gears 130a, 130b may be wound in the same direction.
  • the screws 130a, 130b are each inserted through a channel in the main housing 110 and similar to the screws of the first embodiment, include at least one face to prevent rotation of the screws 130a, 130b within their respective channels. Rotating the nut gears 128a, 128b will translate into linear motion of the screws 130a, 130b. For example, referring to Figures 5A, 5B, and 6D, applying a sideways force to the actuator 114 will cause the nut gears 28a, 28b to rotate and in turn, each of the screws 130a, 130b will move down linearly along a vertical path that is substantially parallel to the axis of rotation of the actuator 114.
  • each of the screws 130a, 130b of the second embodiment may have a head portion with a bore that may be aligned with a corresponding bore in the pawls 120a, 120b.
  • Each screw 130a, 130b may then be coupled to a pawl 120a, 120b, for example, by inserting a pin 132a, 132b, such as a linchpin or a cotter pin, through the bores.
  • a biasing means such as a coil spring 136a, 136b, may also be positioned on the pins 132a, 132b, so that the pawls 120a, 120b are biased to rotate away from the keepers 122a, 122b.
  • the second embodiment may utilize a push plate 137 to rotate the pawls 120a, 120b during actuation towards the keepers 122a, 122b.
  • the push plate 137 may be hingedly attached to the main housing 110 via a plate axle 135.
  • the plate axle 135 may be inserted through bores 131a, 131b on either side
  • a plurality fasteners 133a, 133b may be used to attach the bottom cover 139 to the main housing 110.
  • the plate axle 135 may be generally parallel to at least one guide pin 134 that may be inserted through the pawls 120a , 120b, such that the guide
  • pin 134 is generally parallel to the axis of rotation of the pawls 120a, 120b about the pins 132a, 132b.
  • An actuator cover 164 of the i s actuator 114 includes a peg 165 that contacts a cam surface 129 in the push plate 137.
  • the peg 165 rides along the cam surface 129 causing the push plate 137 to rotate about the plate axle 135.
  • the push plate 137 which is contacting the guide pin 134, urges the pawls 120a, 120b to rotate until the pawls 120a , 120b contact the keepers 122a, 0 122b and no longer rotate.
  • the mechanical latch assembly of the second embodiment may include a safety feature.
  • the teeth on the stationary gear 160 and/or the toothed portion of the locking lever 162 may be configured, such that the button 166 must be depressed to rotate the actuator 114 in at least one direction, preferably towards the unlocked position from the locked position illustrated in Figure
  • a system comprising one or more component assemblies.
  • a 5 mechanical latch and/or a dual mechanical-electrical latch as described above may be combined with a component, such as a panel or a frame, in order to couple one or more of the components together.
  • the components may be provided in the form of rectangular shaped panels 201, 202, 203, 204 that require interlocking, so that they may be oriented vertically in a safe and secure manner.
  • the panels 201, 202, 203, 204 are illustrated in an unlocked state and ready for locking as all of the actuators 211, 213, 215, 217 are in the raised position.
  • each of the panels may have one or more latch assemblies depending on whether only a mechanical or a both a mechanical and electrical connection is desired.
  • the electronics and wiring are configured to span vertically across the frame, such that a dual mechanical/electrical latch assembly should be incorporated on the horizontal sections of the panels 201, 202, 203, 204, while the vertical sections of the panels 201, 202, 203, 204 only require mechanical latch assemblies.
  • the system includes a first and second mechanical/electrical latch assembly and a first and second mechanical latch assembly.
  • the first mechanical/electrical latch assembly includes a keeper housing portion 216b that is installed on the bottom horizontal section of the panel 201 and a main housing portion 216a that is installed on the top horizontal section of panel 203.
  • the second mechanical/electrical latch assembly is similarly installed on adjacent panels 202, 204, wherein the keeper housing 212b is installed on the bottom horizontal section of the top panel 202, while the main housing 212a is installed on the top horizontal section of panel 204.
  • the first and second mechanical latch assemblies are also divided between adjacent panels.
  • the first mechanical latch assembly includes a keeper housing portion 210b installed on a right vertical section of panel 201 and a main housing portion 210a installed on a left vertical section of panel 202.
  • the second mechanical latch assembly includes a keeper housing portion
  • the systems according to various embodiments may include more or less panels and more or less latch assemblies.
  • the latch assemblies are not limited to being installed in the center of each section of the panels, but may be incorporated in any location that will allow the panels of the system to be secured together.
  • a latch system can provide a high compression force with one action to connect or retain two or more panels together, such as LED display panels up to or exceeding 500 X 500 mm in size, while also driving one or more connectors such as driving a plug into an adaptor.
  • the system can include a display panel having two latches, one being on the top and the other being on the side.
  • the system provides single-action generation of a high compression force and connection of a plug into an adaptor. For example, a single action of a user to operate an actuator 90 degrees can complete the hook lock and electrical connection.
  • a square section thread is optionally used to provide a strong self-lock functionto avoid loosening even under high forces up to or exceeding 1000 kg, and a taper gear train is optionally used to provide force direction change and mechanical advantage.
  • the system optionally includes a bi-stable motion hook that can operate against a unique cam curve.
  • the handle or actuator optionally includes a ratchet mechanism to provide a "click" sound and self-lock function (to avoid inadvertent loosening of the latch)

Abstract

A latch assembly for engaging and disengaging a first component mechanically and/or electrically relative to an adjacent second component is provided. The latch assembly includes an electrical connector, a pawl, and an actuator. The electrical connector engages another electrical connector coupled to the second component. The pawl engages a keeper coupled to the second component. The actuator moves relative to the component between first and second positions and is coupled to the electrical connector and to the pawl, such that movement of the actuator relative to the component from the first to the second position may move the electrical connector a first distance in a direction along a path and move the pawl a second distance in an opposite direction along the path, the first distance being different from the second distance. One or more latch assemblies may be included in a component assembly or a system of component assemblies.

Description

PANEL ATTACHMENT LATCH
This application is related to , and claims the benefit of priority of, U.S. Provisional Application No. 62/277,561, entitled PANEL ATTACHMENT LATCH, filed on 12 January 2016, the contents of which are incorporated herein by reference in their entirety for all purposes.
FIELD OF THE INVENTION
The present invention relates to the field of latch assemblies configured to provide a mechanical and/or electrical connection between adjacent components, such as a system of display panels.
BACKGROUND OF THE INVENTION
Panel latches, such as draw latches, typically include a catch and a keeper that are independently coupled to separate panels. The panels may then be secured to one another by latching the catch onto the keeper.
However, an electrical connection in addition to a mechanical connection may be desired in certain applications, such as systems that include a plurality of video display panels, so that the video display panels may be combined and are able to communicate electronically to form a single large display. Such displays are commonly used as part of the staging for concert events and joining and locking the panels together often presents a challenge. The panels are generally heavy and difficult to maintain in place while a user fastens the panels together with a tool, which may also present a safety hazard. Also, should one of the panels need to be removed for repair or replacement, the use of standard fasteners and tools to unlock a single panel may be time consuming and therefore inconvenient or could damage the panels.
There is therefore a need for improved latched assemblies that will allow the locking and unlocking of an array of components, such as video display panels, within a system that may be performed quickly and easily and preferably without the use of a tool.
SUMMARY OF THE INVENTION
According to a first embodiment of the present invention, a latch assembly configured for engaging and disengaging a component mechanically and electrically relative to an adjacent component is provided. The latch assembly comprises an electrical connector, a pawl, and an actuator. The electrical connector may be configured for engagement with an adjacent electrical connector coupled to the adjacent
component, the electrical connector being movable relative to the component along a path. The pawl may be movable relative to the component and configured for engagement of a keeper coupled to the adjacent component, the pawl being movable relative to the component along the path. The actuator may be movable relative to the component between first and second positions, the actuator being coupled to the electrical connector and to the pawl such that movement of the actuator relative to the component moves the electrical connector and the pawl along the path. Movement of the actuator relative to the component from the first position to the second position may move the electrical connector in a direction along the path and move the pawl in an opposite direction along the path. Furthermore, movement of the actuator relative to the component from the first position to the second position may move the electrical connector a first distance along the path and move the pawl a second distance along the path, the first distance being different from the second distance.
In another embodiment of the present invention, a latch assembly configured for engaging and disengaging a component relative to an adjacent component is provided. The latch assembly comprises a pawl, an actuator, and a shaft. The pawl may be movable relative to the component and configured for engagement of a keeper coupled to the adjacent component, the pawl being movable relative to the component along a path. The actuator may be movable relative to the component between first and second positions, the actuator being coupled to the pawl such that movement of the actuator relative to the component moves the pawl along the path. Finally, the shaft may define an axis about which the actuator is mounted for rotation, the shaft being oriented such that the axis is parallel to the path.
In yet another embodiment of the present invention, a component assembly configured for releasable engagement with second and third component assemblies is provided. The component assembly may comprise a component, a first latch assembly, and a second latch assembly. The component may have plural sides at least one of which is positionable adjacent the second or third component assembly. The first latch assembly may be mounted to one of the sides of the component and configured for engaging and disengaging the component mechanically and electrically relative to the second or third component assembly. The first latch assembly may include an electrical connector, a pawl, and an actuator. The electrical connector may be coupled to the component and configured for engagement with an adjacent electrical connector coupled to the second or third component assembly. The electrical connector may be movable relative to the component along a first path. The pawl may be coupled to the component and configured for engagement of a keeper coupled to the second or third component assembly. The pawl may be movable relative to the component along the first linear path. The actuator may be coupled to the component and movable relative to the component between first and second positions and may be coupled to the electrical connector and to the pawl such that movement of the actuator relative to the component moves the electrical connector and the pawl along the first linear path. Movement of the actuator relative to the component from the first position to the second position may move the electrical connector a first distance in a direction along the first linear path and move the pawl a second distance in an opposite direction along the first linear path, the first distance being different from the second distance. The second latch assembly may be configured for engaging and disengaging the component relative to the second or third component assembly. The latch assembly may include a pawl, an actuator, and a shaft. The pawl may be coupled to the component and configured for engagement of a keeper coupled to the second or third component assembly. The pawl may be movable relative to the component along a second linear path. The actuator may be coupled to the component and movable relative to the component between first and second positions and may be coupled to the pawl such that movement of the actuator of the second latch relative to the component moves the pawl along the second linear path. The shaft may define an axis about which the actuator of the second latch is mounted for rotation and oriented such that the axis is transverse to the second linear path.
According to yet another embodiment of the present invention, a system of component assemblies configured for releasable engagement to one another is provided. The system may comprise a plurality of component assemblies each having a
component, an electrical connector coupled to the component, a pawl coupled to the component, a keeper coupled to the component, and an actuator coupled to the component and to the electrical connector and the pawl. The electrical connector may be movable relative to the component in a direction along a linear path and the pawl may be movable relative to the component in an opposite direction along the linear path. Movement of the actuator relative to the component from a first position to a second position may move the electrical connector a first distance in a direction along the linear path and move the pawl a second distance in an opposite direction along the linear path, the first distance being different from the second distance.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other aspects and features of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which :
Figure 1 is an exploded view of a first embodiment of a panel attachment latch according to the present invention ;
Figure 2A is front view of the first embodiment of the panel attachment latch;
Figure 2B is a bottom view of the panel attachment latch of Figure 2A;
Figure 2C is a left side view of the panel attachment latch of Figure 2A;
Figure 3A is a right side cross-sectional view of the panel attachment latch of Figure 2A along axis 3A-3A; Figure 3B is a right side cross-sectional view of the panel attachment latch of Figure 2A along axis 3B-3B;
Figure 3C is a right side cross-sectional view of the panel attachment latch of Figure 2A along axis 3C-3C;
Figure 4 is an exploded view of a second embodiment of a panel attachment latch according to the present invention;
Figure 5A is a front view of the second embodiment of the panel attachment latch;
Figure 5B is a right side view of the panel attachment latch of Figure 5A;
Figure 6A is a bottom cross-sectional view of the panel attachment latch of Figure 5A along axis 6A-6A;
Figure 6B is a top cross-sectional view of the panel attachment latch of Figure 5A along axis 6B-6B;
Figure 6C is a left side cross-sectional view of the panel attachment latch of Figure 5A along axis 6C-6C;
Figure 6D is a right side cross-sectional view of the panel attachment latch of Figure 5A along axis 6D-6D;
Figure 7A is a front view of a plurality of panels in combination with latches according to the present invention in the unlocked condition; and
Figure 7B is a front view of the plurality of panels and latches of Figure 7A in the locked condition.
DETAILED DESCRIPTION OF THE INVENTION
Although the invention is illustrated and described herein with reference to specific embodiments, the invention is not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope and range of equivalents of the claims and without departing from the invention.
Referring to the figures generally, a latch assembly configured for engaging and disengaging a component mechanically and/or electrically relative to an adjacent component is provided, as well as a component assembly and a system comprising a plurality of component assemblies.
The component assemblies according to the various embodiments of the present invention may include a component and one or more latch assemblies. The component may in some applications include a frame 201, 202, 203, 204 for a video display panel. Such a component would require both a mechanical connection and an electrical connection, so that the components may be combined physically and electrically connected into an array for a large video display, for example. Depending on the location of the wiring and electrical components in the frame of the panels, as well as the shape of the panels, a combination of mechanical latch assemblies and dual mechanical/electric latch assemblies may be included on specific locations in various sections of the panels. For example in the embodiment of Figures 7A and 7B, the mechanical/electric latches 212a, b, 216a, b may be located within the horizontal sections between adjacent rectangular-shaped panels arranged in a column, such as panels 201 and 203. In locations where electrical connections are not needed, only a mechanical latch assembly may be installed, such as the latch assemblies 210a, b, 214a, b in the vertical sections of adjacent panels arranged in a row, such as panels 201 and 202.
The latch assemblies include one portion containing a keeper and a second portion containing an actuated pawl. The latch assemblies may be installed across adjacent components, such that the keeper portion is installed on one component and the actuated pawl portion is installed on the adjacent component. The actuator may be in the form of a handle, such as actuators 211, 213, 215, 217, that may be easily rotated with one hand to actuate the pawls and capture the corresponding keepers and optionally join the electrical connectors after a single action of rotating the actuator through a relatively short arc. Therefore, embodiments of the present invention provide a relatively quick and easy way to connect and disconnect component assemblies within a system, thereby avoiding the use of separate fasteners and tools that may become lost or broken and may be more difficult and time consuming to apply and remove.
The latch assembly comprises an electrical connector 18, a pawl 20a, 20b, and an actuator 14 that may be in the form of a handle, for example. The electrical connector 18 may be coupled to the component and configured for engagement with an adjacent electrical connector 16 coupled to the adjacent component, the electrical connector 18 being movable relative to the component along a path. The pawl 20a, 20b, such as a catch, may be movable relative to the component and configured for engagement of a keeper 22a, 22b, such as a striker or bolt, coupled to the adjacent component, the pawl 20a, 20b being movable relative to the component along the path. Finally, the actuator 14 may be movable relative to the component between first and second positions, the actuator 14 being coupled to the electrical connector 18 and to the pawl 20a, 20b, such that movement of the actuator 14 relative to the component moves the electrical connector 18, and the pawl 20a, 20b along the path. Movement of the actuator 14 relative to the component from the first position to the second position may move the electrical connector 18 a first distance in a direction along the path and move the pawl 20a, 20b in an opposite direction along the path, the first distance being different from the second distance.
The latch assembly may further comprise a carriage 46 that may be movable relative to the component along the linear path. The electrical connector 18 may be coupled to the carriage 46 for movement with the carriage 46. The latch assembly may also further comprise a plurality of pawls 20a, 20b configured for engagement of one or more keepers 22a, 22b coupled to the adjacent component, a plurality of electrical connectors 18 configured for engagement with one or more adjacent electrical connectors 16 coupled to the adjacent component, and a gear linkage, such as beveled gears 26a, 26b, 28a, 28b and rotary gears 126a, 126b, 128a, 128b coupling the actuator 14 to the pawl 20a, 20b or a gear linkage, such as a rack-and- pinion gear 54, 50, coupling the actuator 14 to the electrical connector 18. The latch assembly may further comprise a shaft 24, 124 defining an axis about which the actuator 14 is mounted for rotation. The shaft 24, 124 may be oriented such that the axis is either transverse or perpendicular to the linear path, and the actuator may be mounted for rotation about the axis 90 degrees from the first position to the second position. The actuator 14 may also be selectively locked to prevent movement of the actuator 14.
According to another embodiment of the present invention, a latch assembly configured for engaging and disengaging a component relative to an adjacent component may comprises a pawl 120a, 120b, an actuator 114, and a shaft 124. The pawl 120a, 120b may be movable relative to the component and configured for engagement of a keeper 122a, 122b may be coupled to the adjacent component, the pawl 120a, 120b being movable relative to the component along a path. The actuator 114 may be movable relative to the component between first and second positions, the actuator 114 being coupled to the pawl 120a, 120b such that movement of the actuator 114 relative to the component moves the pawl 120a, 120b along the path. The shaft 124 may define an axis about which the actuator 114 is mounted for rotation, wherein the axis is either parallel or perpendicular to the linear path.
In yet another embodiment, a component assembly configured for releasable engagement with second and third component assemblies is provided. A plurality of component assemblies may also be combined to provide a system. The component assembly comprises a component 204 having plural sides at least one of which is positionable adjacent the second or third component assembly. The component assembly further comprises a first and second latch assembly.
The first latch assembly 212a may be mounted to one of the sides of the component and configured for engaging and disengaging the component mechanically and electrically relative to the second or third component assembly. The first latch assembly may include an electrical connector 18, a pawl 20a, 20b, and an actuator 14. The electrical connector 18 may be configured for engagement with an adjacent electrical connector 16 coupled to the second or third component assembly, the electrical connector 18 being movable relative to the component 204 along a first path. The pawl 20a, 20b may be configured for engagement of a keeper 22a, 22b coupled to the second or third component assembly, the pawl 20a, 20b being movable relative to the
component along the first linear path. The actuator 14 may be movable relative to the component 204 between first and second positions and may be coupled to the electrical connector 18 and to the pawl 20a, 20b such that movement of the actuator 14 relative to the component 204 moves the electrical connector 18 and the pawl 20a, 20b along the first linear path. Movement of the actuator 14 relative to the component 204 from the first position to the second position moves the electrical connector 14 a first distance in a direction along the first linear path and moves the pawl 20a, 20b a second distance in an opposite direction along the first linear path, the first distance being different from the second distance.
The second latch assembly may be configured for engaging and disengaging the component 204 relative to the second or third component assembly and include a pawl 120a, 120b, an actuator 114, and a shaft 124. The pawl 120a, 120b may be configured for engagement of a keeper 122a, 122b coupled to the second or third component assembly and movable relative to the component 204 along a second linear path . The actuator 114 may be movable relative to the component between first and second positions and coupled to the pawl 120a, 120b such that movement of the actuator 114 of the second latch relative to the component 204 moves the pawl 120a, 120b along the second linear path. The shaft 124 may define an axis about which the actuator 114 of the second latch is mounted for rotation, the shaft 124 being oriented such that the axis is parallel to the second linear path.
Referring now to the figures specifically, wherein like numerals refer to like elements throughout the description of the drawings, an exploded view of a first embodiment of a latch assembly is provided in Figure 1. The latch assembly includes a keeper housing 12 and a main housing 10. The keeper housing 12 includes one or more keepers 22a, 22b, such as a striker or a bolt, as well as a female electrical connector 16. The keeper housing 12 may also include a cover piece 37 to assist in maintaining the female connector 16 in place. The main housing 10 includes one or more pawls 20a, 20b that may be in the form a hook-shaped catch, for example, for interacting with the keepers 22a, 22b, as well as a male electrical connector 18. Similarly the main housing 10 may include a cover plate 38 to maintain the male connector 18 in position. In other embodiments of the present invention, the male and female connectors may be reversed, such that the male portion is in the keeper housing and the female portion is in the main housing . The keeper housing 12 and main housing 10 may be coupled to respective panels, such as the panel assemblies illustrated in Figures 7A and 7B, which will be described in greater detail below.
In order to latch the pawls 20a, 20b to the keepers 22a, 22b and join the male connector 18 to the female connector 16, the main housing 10 further comprises an actuator that includes, for example, an actuator 14 that is operatively connected to the pawls 20a, 20b via a gear train and the male electrical connector 18 via a rack-and- pinion gear in order to actuate the latch by rotating the actuator 14. The actuator 14 includes a gripping portion 56 on one end of the actuator 14 and a main body portion 58 on an opposing end of the actuator 14. An actuator gear 54 configured for rotation with the actuator 14 is located on or adjacent to an outer surface of the main body 58. In one embodiment, the actuator gear may be integrally formed in the main body portion 58. An axle 24 is inserted through the main body portion 58 of the actuator 14 and the center of actuator gear 54, so that the actuator 14 is rotatably mounted within the main housing 10. The ends of the axle 24 may be include a retaining means, such as C-clips 40a, 40b, to prevent the axle from sliding longitudinally within the main housing 10. The actuator gear 54 and the actuator 14 are preferably configured to rotate with the axle 24 during actuation of the latch, preferably about 90 degrees, from a first starting position to a second final position. For example, as best viewed in Figure 3C, a pin 42b may be transversely inserted through the axle 24 and mounted in a coplanar fashion within the integral actuator gear 54.
In order to actuate the male electrical connector 18, the male electrical connector 18 may be coupled to a carriage 46 that is able to move along a substantially linear path in response to rotational movement of the actuator 14. For example, the male electrical connector 18 may be positioned between brackets 48a, 48b in an area that is adjacent to a leading edge of the carriage 46. The male connector 18 may optionally be held in place using a cover plate 38. The carriage 46 may be slidably mounted to the underside of the main housing 10 and optionally include a rack portion 50 that engages the teeth of the actuator gear 54 to convert the rotational motion of the actuator gear 54 into linear motion of the carriage 46. Referring again to the
embodiment of Figure 3C as an example, downward force applied to the actuator 14 causes counter-clockwise rotation of the actuator gear 54 and in turn an upward vertical movement of the rack 50, carriage 46, and male connector 18, so that the male connector 18 travels a first distance to mate with the corresponding female electrical connector 16 in the keeper housing 12.
According to various embodiments of the invention, actuation of the latch mechanism may simultaneously actuate the pawls with the electrical connector. For example, opposing ends of the axle 24 may also include a beveled gear 26a, 26b on opposing ends of the axle 24. Similar to the actuator gear 54, pins 42a, 42c may be transversely inserted in the axle 24 and inserted in the bevel gears 26a, 26b in a coplanar fashion, so that the bevel gears 26a, 26b rotate with the axle 24 and the actuator 14. Each of the bevel gears 26a, 26b may engage a corresponding nut gear 28a, 28b that is oriented perpendicular to the bevel gears 26a, 26b. Each of the nut gears 28a, 28b may include internal threading to engage a screw 30a, 30b. The threading may preferably have a square cross-section to maintain a locked condition under excess force and to prevent or inhibit wear so that the latch assembly does not loosen in the locked condition over time. The screws 30a, 30b are each inserted through a channel in the main housing 10 and include at least one face to prevent rotation of the screws 30a, 30b within their respective channels. For example, as best seen in Figure 1, for certain embodiments of the invention, the screws 30a, 30b may have a neck portion having a square-shaped cross-section to prevent rotation in the main housing 10.
During actuation, the bevel gears 26a, 26b rotate with the actuator 14 which in turn causes rotation of the nut gears 30a, 30b. Referring to Figures 2B and 2C, the nut gear 28b may be held in place between the bevel gear 26b and an internal face 27 of the main housing 10, such that rotating the nut gear 28b will translate into linear motion of the screw 30b. For example, as best seen in Figure 2B, the beveled gears 26a, 26b are positioned, such that the teeth of the beveled gears 26a, 26b are facing away from each other, and applying a downward force to the actuator 14 will cause the nut gears 28a, 28b to rotate in opposite directions. As would be appreciated by one of skill in the art, the threading of the right screw 30a and right nut gear 28a may be wound in the opposite direction than the threading of the left screw 30b and nut gear 28b, so that the screws 30a, 30b move linearly in a common direction.
Each of the screws 30a, 30b may have a head portion with a bore that may be aligned with a corresponding bore in the pawls 20a, 20b. Each screw 30a, 30b may then be coupled to a pawl 20a, 20b, for example, by inserting a pin 32a, 32b, such as a linchpin or a cotter pin, through the bores. A biasing means, such as a coil spring 36a, 36b, may also be positioned on the pins 32a, 32b, so that the pawls 20a, 20b are biased to rotate away from the keepers 22a, 22b. In order to rotate the pawls 20a, 20b during actuation, a follower, such as a guide pin 34a, 34b, may be provided on each of the pawls 20b, 20b and configured to interact with a cam surface, such as a curved surface 50a, 50b on the brackets 48a, 48b.
During actuation upon partially rotating the actuator 14 towards the locked position, the screws 30a, 30b retract linearly in a direction opposite to the movement of the carriage 46 causing the guide pins 34a, 34b to ride along a respective curved surface 50a, 50b causing each of the pawls 20b, 20b to rotate about pins 32a, 32b until the pawls 20a, 20b contact the keepers 22a, 22b and no longer rotate. From this position, continuing rotation of the actuator 14 to the locked position will cause the guide pins 34a, 34b to travel along a substantially straight slot 52a, 52b and linearly retract the pawls 20a, 20b with the screws 30a, 30b, so that the hook-shaped pawls 20a, 20b will grasp the keepers 22a, 22b and draw the keeper housing 12 towards the main housing 10 until the actuator 14 reaches the end of its rotation, i.e. the locked position best viewed in Figure 3A. The total distance travelled by the screws 30a, 30b may be different than the total distance travelled by the carriage 46. The actuator 14 may optionally include a safety feature to prevent rotation towards the unlocked position. For example in one embodiment, the actuator 14 may have a hollow main body portion 58 that houses a locking lever 62 on a fulcrum pin 63. A biasing means 70, such as a coil spring, may also be located on the fulcrum pin 63 for biasing the locking lever 62. One end of the locking lever 62 may include a button 66 that protrudes through an opening 68 near the gripping portion 56 of the actuator 14, while the opposite end of the locking lever 62 includes a toothed portion 65. The hollow main body portion 58 of the actuator 14 may also house a stationary gear 60, and the locking lever 62 may be biased, such that the toothed portion 65 of the locking lever 62 engages the stationary gear 60. The stationary gear 60 may be held in place by a stationary gear bracket 74 within the main housing 10, so that the stationary gear 60 maintains the same position as the actuator 14 rotates. The axle 24 may be inserted through and configured to rotate within the approximate center of the stationary gear 60 and the stationary gear bracket 74. An actuator cover 64 attached to the actuator 14 with a plurality of fasteners, such as screws 72a, 72b, and 72c, may be used to close the hollow main body portion 58.
The teeth on the stationary gear 60 and/or the toothed portion 65 of the locking lever 62 may be configured, such that depression of the button 68 is not necessary to rotate the actuator 14 to the locked position, as illustrated in Figure 3B. However, in order for a user to rotate the actuator 14 from the locked position of Figure 3B to an unlocked position, the button 66 must be depressed to disengage the toothed portion 65 of the locking lever 62 from the stationary gear 60. This prevents undesired rotation of the actuator to the unlocked position.
Referring now to Figures 4 to 6D, a second embodiment of a latch assembly according to the present invention is provided. The latch assembly includes a keeper housing 112 and a main housing 110. The keeper housing 112 includes one or more keepers 122a, 122b, such as a striker or a bolt. The main housing 110 includes one or more pawls 120a, 120b for interacting with the keepers 122a, 122b. The keeper housing 112 and main housing 110 may be coupled to respective panels, such as the panel assemblies illustrated in Figures 7A and 7B, which will be described in greater detail below.
In order to latch the pawls 120a, 120b to the keepers 122a, 122b, the main housing 110 further comprises an actuator 114 that may be in the form of a handle, for example, and is operatively connected to the pawls 120a, 120b via a gear train.
The actuator 114 includes a gripping portion 156 on one end of the actuator 114 and a main body portion 158 on an opposing end of the actuator 114. An actuator gear 154 configured for rotation with the actuator 114 is located on or adjacent to an outer surface of the main body 158. In one embodiment, the actuator gear may be integrally formed in the main body portion 158. A primary axle 124 is inserted through the main body portion 158 of the actuator 114 and the center of actuator gear 154, so that the actuator 114 is rotatably mounted within the main housing 110. At least one end of the axle 124 may be include a retaining means, such as a C-clip 140b, to prevent the primary axle 124 from sliding longitudinally within the main housing 110. Unlike the first embodiment, it is not necessary that the actuator gear 154 and the actuator 114 rotate with the primary axle 124 during actuation of the latch.
The gear train may further comprise auxiliary gears 126a, 126b that rotate about respective auxiliary axles 144a, 144b having longitudinal axes that are
substantially parallel to the longitudinal axis of the primary axle 124. The auxiliary axles 144a, 144b, may also include retaining means, such as C-clips 140a, 140c, to prevent the auxiliary axles 144a, 144b from sliding longitudinally within the main housing 110. Each of the auxiliary gears 126a, 126b have teeth that engage the actuator gear 154 and a respective nut gear 128a, 128b that, like the auxiliary gears 126a, 126b, are oriented to rotate about an axis that is parallel to the axis of rotation of the actuator gear 154.
During actuation of the second embodiment of the latch assembly, the nut gears 128a, 128b rotate in the same direction as the actuator gear 154, while the auxiliary gears 144a, 144b rotate in the opposite direction as the actuator 114 is rotated from an unlocked to a locked position. Each of the nut gears 128a, 128b may include internal threading to engage a screw 130a, 130b. Because the nut gears 128a, 128b rotate in the same direction, the threading of the screws 130a, 130b and the nut gears 130a, 130b may be wound in the same direction. The screws 130a, 130b are each inserted through a channel in the main housing 110 and similar to the screws of the first embodiment, include at least one face to prevent rotation of the screws 130a, 130b within their respective channels. Rotating the nut gears 128a, 128b will translate into linear motion of the screws 130a, 130b. For example, referring to Figures 5A, 5B, and 6D, applying a sideways force to the actuator 114 will cause the nut gears 28a, 28b to rotate and in turn, each of the screws 130a, 130b will move down linearly along a vertical path that is substantially parallel to the axis of rotation of the actuator 114.
Similar to the first embodiment, each of the screws 130a, 130b of the second embodiment may have a head portion with a bore that may be aligned with a corresponding bore in the pawls 120a, 120b. Each screw 130a, 130b may then be coupled to a pawl 120a, 120b, for example, by inserting a pin 132a, 132b, such as a linchpin or a cotter pin, through the bores. A biasing means, such as a coil spring 136a, 136b, may also be positioned on the pins 132a, 132b, so that the pawls 120a, 120b are biased to rotate away from the keepers 122a, 122b. Unlike the first embodiment, the second embodiment may utilize a push plate 137 to rotate the pawls 120a, 120b during actuation towards the keepers 122a, 122b. The push plate 137 may be hingedly attached to the main housing 110 via a plate axle 135. The plate axle 135 may be inserted through bores 131a, 131b on either side
5 of the push plate 137 before placing the plate axle 137 within a cradle portion 138 of a bottom cover 139 and attaching the bottom cover 139 to the bottom of the main housing 110. A plurality fasteners 133a, 133b may be used to attach the bottom cover 139 to the main housing 110. The plate axle 135 may be generally parallel to at least one guide pin 134 that may be inserted through the pawls 120a , 120b, such that the guide
10 pin 134 is generally parallel to the axis of rotation of the pawls 120a, 120b about the pins 132a, 132b.
In the starting unlocked position, the guide pin 134 rests against one more contact surfaces 127a, 127b of the push plate 137, such that the pawls 120a, 120b and the push plate 137 are in a raised and ready position. An actuator cover 164 of the i s actuator 114 includes a peg 165 that contacts a cam surface 129 in the push plate 137.
As the actuator 114 is rotated from an unlocked position to a locked position, the peg 165 rides along the cam surface 129 causing the push plate 137 to rotate about the plate axle 135. As a result, the push plate 137, which is contacting the guide pin 134, urges the pawls 120a, 120b to rotate until the pawls 120a , 120b contact the keepers 122a, 0 122b and no longer rotate. Continuing rotation of the actuator 114 to the locked position will linearly retract the pawls 120a, 120b with the screws 130a, 130b, so that the hook- shaped pawls 120a, 120b will grasp the keepers 122a, 122b and draw the keeper housing 112 towards the main housing 110 until the actuator 114 reaches the end of its rotation, i.e. the locked position best viewed in Figure 6D.
25 Similar to the first embodiment, the mechanical latch assembly of the second embodiment may include a safety feature. The teeth on the stationary gear 160 and/or the toothed portion of the locking lever 162 may be configured, such that the button 166 must be depressed to rotate the actuator 114 in at least one direction, preferably towards the unlocked position from the locked position illustrated in Figure
30 6A. Depressing the button 166 disengages the toothed portion of the locking lever 162 from the stationary gear 160, which may be held in place by a stationary gear bracket 174 that is attached to the bottom cover 139 of the main housing 110.
In yet another embodiment of the present invention, a system is provided comprising one or more component assemblies. Referring to Figures 7A and 7D, a 5 mechanical latch and/or a dual mechanical-electrical latch as described above may be combined with a component, such as a panel or a frame, in order to couple one or more of the components together. The components may be provided in the form of rectangular shaped panels 201, 202, 203, 204 that require interlocking, so that they may be oriented vertically in a safe and secure manner. In Figure 7A, the panels 201, 202, 203, 204 are illustrated in an unlocked state and ready for locking as all of the actuators 211, 213, 215, 217 are in the raised position. As would be appreciated by one of skill in the art, each of the panels may have one or more latch assemblies depending on whether only a mechanical or a both a mechanical and electrical connection is desired. In the embodiment illustrated in Figures 7A and 7B, for example, the electronics and wiring are configured to span vertically across the frame, such that a dual mechanical/electrical latch assembly should be incorporated on the horizontal sections of the panels 201, 202, 203, 204, while the vertical sections of the panels 201, 202, 203, 204 only require mechanical latch assemblies.
As illustrated in Figure 7A, the system includes a first and second mechanical/electrical latch assembly and a first and second mechanical latch assembly. The first mechanical/electrical latch assembly includes a keeper housing portion 216b that is installed on the bottom horizontal section of the panel 201 and a main housing portion 216a that is installed on the top horizontal section of panel 203. The second mechanical/electrical latch assembly is similarly installed on adjacent panels 202, 204, wherein the keeper housing 212b is installed on the bottom horizontal section of the top panel 202, while the main housing 212a is installed on the top horizontal section of panel 204. The first and second mechanical latch assemblies are also divided between adjacent panels. The first mechanical latch assembly includes a keeper housing portion 210b installed on a right vertical section of panel 201 and a main housing portion 210a installed on a left vertical section of panel 202.
The second mechanical latch assembly includes a keeper housing portion
214b installed in the right vertical section of panel 203 and a main housing portion 214a installed in the left vertical section of panel 204. Thus, in order to lock the panels of system together, a user may simply place the panels in close proximity to each other, such that the related portions of the latch assemblies are sufficiently close to allow the pawls in each latch assembly to capture their corresponding keepers upon rotating the actuators to their locked position, as illustrated in Figure 7B. As would be appreciated by one of skill in the art, the systems according to various embodiments may include more or less panels and more or less latch assemblies. Also, the latch assemblies are not limited to being installed in the center of each section of the panels, but may be incorporated in any location that will allow the panels of the system to be secured together.
According to exemplary embodiments of the invention, a latch system can provide a high compression force with one action to connect or retain two or more panels together, such as LED display panels up to or exceeding 500 X 500 mm in size, while also driving one or more connectors such as driving a plug into an adaptor.
The system can include a display panel having two latches, one being on the top and the other being on the side. Among other features, the system provides single-action generation of a high compression force and connection of a plug into an adaptor. For example, a single action of a user to operate an actuator 90 degrees can complete the hook lock and electrical connection.
A square section thread is optionally used to provide a strong self-lock functionto avoid loosening even under high forces up to or exceeding 1000 kg, and a taper gear train is optionally used to provide force direction change and mechanical advantage. The system optionally includes a bi-stable motion hook that can operate against a unique cam curve. Also, as described above, the handle or actuator optionally includes a ratchet mechanism to provide a "click" sound and self-lock function (to avoid inadvertent loosening of the latch)
While preferred embodiments of the invention have been shown and described herein, it will be understood that such embodiments are provided by way of example only. Numerous variations, changes and substitutions will occur to those skilled in the art without departing from the spirit of the invention. Accordingly, it is intended that the appended claims cover all such variations as fall within the spirit and scope of the invention.

Claims

What is Claimed :
1. A latch assembly configured for engaging and disengaging a component mechanically and electrically relative to an adjacent component, the latch assembly comprising :
an electrical connector coupled to the component and configured for engagement with an adjacent electrical connector coupled to the adjacent component, the electrical connector being movable relative to the component along a path;
a pawl movable relative to the component and configured for engagement of a keeper coupled to the adjacent component, the pawl being movable relative to the component along the path; and
an actuator movable relative to the component between first and second positions, the actuator being coupled to the electrical connector and to the pawl such that movement of the actuator relative to the component moves the electrical connector and the pawl along the path;
wherein movement of the actuator relative to the component from the first position to the second position moves the electrical connector in a direction along the path and moves the pawl in an opposite direction along the path; and
wherein movement of the actuator relative to the component from the first position to the second position moves the electrical connector a first distance along the path and moves the pawl a second distance along the path, the first distance being different from the second distance.
2. The latch assembly of claim 1, wherein the pawl comprises a catch.
3. The latch assembly of claim 1, wherein the keeper comprises a striker.
4. The latch assembly of claim 3, wherein the striker comprises a bolt.
5. The latch assembly of claim 1, further comprising a carriage movable relative to the component along the linear path, the electrical connector being coupled to the carriage for movement with the carriage.
6. The latch assembly of claim 1 comprising a plurality of pawls configured for engagement of one or more keepers coupled to the adjacent component.
7. The latch assembly of claim 1 comprising a plurality of electrical connectors configured for engagement with one or more adjacent electrical connectors coupled to the adjacent component.
8. The latch assembly of claim 1, further comprising a gear linkage coupling the actuator to the pawl.
9. The latch assembly of claim 8, the gear linkage being selected from the group consisting of a beveled gear and a rotary gear.
10. The latch assembly of claim 1, further comprising a gear linkage coupling the actuator to the electrical connector.
11. The latch assembly of claim 10, the gear linkage comprising a rack-and-pinion gear.
12. The latch assembly of claim 1, further comprising a shaft defining an axis about which the actuator is mounted for rotation.
13. The latch assembly of claim 12, the shaft being oriented such that the axis is transverse to the linear path.
14. The latch assembly of claim 13, the shaft being oriented such that the axis is perpendicular to the linear path.
15. The latch assembly of claim 12, wherein the actuator is mounted for rotation about the axis 90 degrees from the first position to the second position.
16. The latch assembly of claim 1 further comprising a locking mechanism to selectively prevent movement of the actuator.
17. A latch assembly configured for engaging and disengaging a component relative to an adjacent component, the latch assembly comprising :
a pawl movable relative to the component and configured for engagement of a keeper coupled to the adjacent component, the pawl being movable relative to the component along a path; and
an actuator movable relative to the component between first and second positions, the actuator being coupled to the pawl such that movement of the actuator relative to the component moves the pawl along the path; and
a shaft defining an axis about which the actuator is mounted for rotation.
18. The latch assembly of claim 17, the shaft being oriented such that the axis is parallel to the path.
19. The latch assembly of claim 17, the shaft being oriented such that the axis is perpendicular to the linear path.
20. The latch assembly of claim 17, further comprising a gear linkage coupling the actuator to the pawl.
21. The latch assembly of claim 20, the gear linkage being selected from the group consisting of a beveled gear and a rotary gear.
22. A component assembly configured for releasable engagement with second and third component assemblies, the component assembly comprising :
a component having plural sides at least one of which is positionable adjacent the second or third component assembly; a first latch assembly mounted to one of the sides of the component, the first latch assembly being configured for engaging and disengaging the component mechanically and electrically relative to the second or third component assembly, the first latch assembly including :
an electrical connector configured for engagement with an adjacent electrical connector coupled to the second or third component assembly, the electrical connector being movable relative to the component along a first path;
a pawl configured for engagement of a keeper coupled to the second or third component assembly, the pawl being movable relative to the component along the first linear path; and
an actuator movable relative to the component between first and second positions, the actuator being coupled to the electrical connector and to the pawl such that movement of the actuator relative to the component moves the electrical connector and the pawl along the first linear path;
wherein movement of the actuator relative to the component from the first position to the second position moves the electrical connector in a direction along the first linear path and moves the pawl in an opposite direction along the first linear path; and
wherein movement of the actuator relative to the component from the first position to the second position moves the electrical connector a first distance along the first linear path and moves the pawl a second distance along the first linear path, the first distance being different from the second distance; and
a second latch assembly configured for engaging and disengaging the component relative to the second or third component assembly, the latch assembly including :
a pawl configured for engagement of a keeper coupled to the second or third component assembly, the pawl being movable relative to the component along a second linear path; and
an actuator movable relative to the component between first and second positions, the actuator of the second latch being coupled to the pawl such that movement of the actuator of the second latch relative to the component moves the pawl along the second linear path; and
a shaft defining an axis about which the actuator of the second latch is mounted for rotation, the shaft being oriented such that the axis is parallel to the second linear path.
23. A system of component assemblies configured for releasable engagement to one another, the system comprising:
a plurality of component assemblies each having a component, an electrical connector, a pawl, and an actuator coupled to the electrical connector and the pawl, wherein the electrical connector is movable relative to the component in a direction along a linear path and the pawl is movable relative to the component in an opposite direction along the linear path;
wherein movement of the actuator relative to the component from a first position to a second position moves the electrical connector in a direction along the linear path and moves the pawl in an opposite direction along the linear path; and wherein movement of the actuator relative to the component from the first position to the second position moves the electrical connector a first distance along the linear path and moves the pawl a second distance along the linear path, the first distance being different from the second distance.
24. The system of claim 23, the plurality of component assemblies each further having a second pawl being movable relative to the component along a second linear path; and a second actuator movable relative to the component between first and second positions, the second actuator being coupled to the second pawl such that movement of the second actuator relative to the component moves the second pawl along the second linear path; wherein the second linear path is transverse to the linear path.
PCT/US2017/012812 2016-01-12 2017-01-10 Panel attachment latch WO2017123528A1 (en)

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Applications Claiming Priority (2)

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US201662277561P 2016-01-12 2016-01-12
US62/277,561 2016-01-12

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