Robust push-push connector

Abstract

The present disclosure relates generally to movable coupling mechanisms, and more particularly to push-push devices for adjustably coupling a first object to a second object. In some embodiments, a push-push device includes a shuttle block configured to couple to a first object, a track block configured to couple to a second object, and an arm rotatably coupled to the shuttle block at a distal end of the arm and slidably coupled to the track at a proximal end of the arm. The push-push device may also include one or more first springs configured to apply a torsional preload force to the arm and one or more second springs configured to apply a linear preload force between the shuttle block and the track block.

Description

Background Technology

[0001] Push-push mechanisms can be used in a variety of applications to guide interactions between two or more objects. A push-push mechanism is characterized as a mechanical mechanism that is activated by applying a force in the same direction to transition the device between at least two stable states. In some examples, push-push mechanisms can be used as latching mechanisms, where a unidirectional force is applied to achieve the attachment and release of a first and a second object, such as to unlock and lock a closure (e.g., a hinged cabinet or a sliding drawer). In some examples, push-push mechanisms can be used as adjustable connectors, where a unidirectional force is applied to extend and retract a first object from a second object. Common examples of such push-push adjustable connectors include mechanisms used in the legs of a camera tripod or the adjustable ends of a retractable pen.

[0002] Various configurations of push-push latches and connectors are known. However, many of these configurations rely on brittle components or mechanisms that are susceptible to damage if used improperly by the user. Summary of the Invention

[0003] The embodiments of this disclosure generally relate to coupling mechanisms for instruments and apparatuses, and more specifically to push-push mechanisms for coupling one or more objects together. In some embodiments, a push-push device is provided for adjustably coupling a first object to a second object. The push-push device includes a shuttle block configured to be coupled to the first object, a track block configured to be coupled to the second object, and an arm having a distal end and a proximal end. The distal end of the arm is rotatably coupled to the shuttle block, and the proximal end of the arm is slidably coupled to a recessed track in the track block. The push-push device also includes one or more first springs disposed between the distal end of the arm and the shuttle block, and one or more second springs extending between the track block and the shuttle block. The one or more first springs may be configured to apply a torsional preload force to the arm, while the one or more second springs may be configured to apply a linear preload force between the distal end of the track block and the proximal end of the shuttle block. When a thrust is applied to the distal end of the shuttle block and directed toward the distal end of the track block, the distal end of the arm is configured to rotate relative to the shuttle block, and the proximal end of the arm is configured to move along a recessed track of the track block. As the proximal end of the arm moves along the recessed track in response to the thrust, the push-push mechanism is configured to transition between a latched state and an unlocked state. Attached Figure Description

[0004] To gain a detailed understanding of the features described above, reference can be made to the embodiments for a more specific description of the briefly summarized disclosure, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings only illustrate exemplary embodiments and should not be construed as limiting the scope of the disclosure, and other equally effective embodiments are permissible.

[0005] Figures 1A to 1D A perspective view, a top view, a bottom view, and a side view of an exemplary push-push connector according to certain embodiments are shown respectively.

[0006] Figure 2A Illustrations are shown according to certain embodiments Figures 1A to 1D An exploded perspective view of the connector depicted in the image.

[0007] Figure 2B Illustrations are shown according to certain embodiments Figures 1A to 1D The diagram shows a partially exploded perspective view of the connector.

[0008] Figure 2C Illustrations are shown according to certain embodiments Figures 1A to 1D A portion of the connector depicted in the image is used through Figure 1B The side view of the section line 2C-2C in the figure.

[0009] Figure 3 Illustrations are shown according to certain embodiments Figures 1A to 1D The image depicts a near-end view of the connector.

[0010] Figure 4 Illustrations are shown according to certain embodiments Figures 1A to 1D A top view of an exemplary track block of the connector depicted in the image.

[0011] Figure 5A Illustrations are shown according to certain embodiments Figures 1A to 1D The diagram depicts a partially exploded perspective view of the connector, with the arms shown in dashed lines.

[0012] Figure 5B Illustrations are shown according to certain embodiments Figures 1A to 1D An exploded detailed view of a portion of the connector depicted in the image.

[0013] Figure 6A The illustration shows a source from certain embodiments. Figures 1A to 1D A perspective view of an exemplary reaction disc of a connector depicted in the figure.

[0014] Figure 6B The illustration shows a source from certain embodiments. Figures 1A to 1D A perspective view of an exemplary arm of the connector depicted in the figure.

[0015] Figures 7A to 7F Illustrations are shown according to certain embodiments Figures 1A to 1D A perspective view of the connector during operation.

[0016] Figures 8A to 8F It is shown that, according to certain embodiments, when the connector is such Figures 7A to 7FThe corresponding view showing the position and movement of a portion of the connector during operation as depicted.

[0017] For ease of understanding, the same reference numerals have been used where possible to refer to the same elements common to the figures. It is contemplated that elements and features of one embodiment can be advantageously combined in other embodiments without further description. Detailed Implementation

[0018] In the following description, details are illustrated by way of example to aid understanding of the disclosed subject matter. However, it will be clear to those skilled in the art that the disclosed embodiments are exemplary and not an exhaustive list of all possible embodiments. Therefore, it should be understood that references to the described examples are not intended to limit the scope of this disclosure. Those skilled in the art to which this disclosure pertains will generally be fully capable of conceiving any changes and further modifications to the described apparatus, instruments, and methods, as well as any further applications of the principles of this disclosure. In particular, it will be fully contemplated that features, components, and / or steps described for one embodiment can be combined with features, components, and / or steps described for other embodiments of this disclosure.

[0019] Note that, as described herein, the distal end, distal segment, or distal portion of a component refers to the end, segment, or portion that is closer to the user when thrust is applied during its use. On the other hand, the proximal end, proximal segment, or proximal portion of a component refers to the end, segment, or portion that is farther from the user when thrust is applied.

[0020] The embodiments disclosed herein generally relate to push-push mechanisms for use with medical devices and apparatuses as well as other equipment.

[0021] Various configurations of push-push latches and connectors are known. For example, some conventional push-push mechanisms include a latch arm configured to laterally translate to perform a cycle between a latched and unlocked state in a mechanical track. As the arm travels along the track, it gradually deflects perpendicular to the loop, such that at the end of the cycle, the end of the arm has traveled past a vertical edge in the surface of the track, preventing reverse movement of the arm. This effectively “resets” the cycle to the starting position. However, the perpendicular deflection of the arm to the track can make the push-push mechanism slightly vulnerable, as a relatively large force under tension can cause the arm to detach from the track. Such detachment can lead to malfunction or even damage to the arm and / or other components of the push-push mechanism.

[0022] In other examples, the arm may be relatively rigid and strong, but not preloaded. In such examples, the arm can be guided to a latched or unlocked state by the shape of the track itself, but this may not work effectively unless the arm is arranged in a specific orientation relative to gravity.

[0023] The following description provides a robust push-push mechanism that addresses many of the problems associated with conventional push-push devices. Certain embodiments of this disclosure provide a robust push-push mechanism that can be used in a variety of applications where a first object needs to be adjustablely or movably coupled to a second object to allow the first object to extend and retract. For example, in some embodiments, the described push-push mechanism can be used in medical devices and apparatuses. One such example of a suitable medical device includes a foot switch for surgical procedures. More specifically, the described push-push mechanism can be used to attach a safety shield (e.g., a first object) for a foot switch to a stationary base (e.g., a second object) of the foot switch, such that the shield can be adjusted between an extended position (for use) and a retracted position (for retracting and charging the foot switch). Thus, certain embodiments described herein enable the shield of the foot switch to be extended and retracted by the same pushing action. While the specific examples presented herein relate to a protective cover for a surgical foot switch, it should be understood that the examples of this disclosure can be used in any application that benefits from the combination of a push-push connector that can facilitate the extension and retraction of an object relative to another stationary object between multiple states.

[0024] Figures 1A to 1D Perspective views, top views, bottom views, and side views of exemplary push-to-push connectors according to certain embodiments are shown respectively. For clarity, they are described together herein. Figures 1A to 1DA push-push connector (hereinafter referred to as the "connector") 100 includes a lever block 102 disposed at a distal end 116 of the connector 100, a track block 108 disposed at a proximal end 118 of the connector 100, and a shuttle block 104 disposed between the lever block 102 and the track block 108. The lever block 102 is coupled to the shuttle block 104 via a latch plate 120. The connector 100 includes a main rod 110 extending through the shuttle block 104 between the track block 108 and the lever block 102. The connector 100 also includes an arm 106, a pair of compression springs 112A, 112B, and a pair of compression spring rods 114A, 114B extending between the shuttle block 104 and the track block 108. In other embodiments, this pair of compression springs 112A, 112B includes tension springs, helical springs, or torsion springs. Typically, the connector 100 is actuated by pushing the lever block 102 and the shuttle block 104 connected thereto toward the track block 108. When lever 102 is pushed toward track block 108, the movement of arm 106 relative to track block 108 allows lever 102 to change between an extended position and a retracted position relative to track block 108, as described in further detail below. The change of lever 102 between the extended and retracted positions, in turn, causes connector 100 to change between an unlocked state and a latched state.

[0025] Arm 106 includes a distal end 122 rotatably coupled to the top surface 126 of shuttle block 104 and a proximal end 124 slidably coupled to the top surface 132 of track block 108. The distal end 122 of arm 106 is secured to shuttle block 104 by fastener 138. The proximal end 124 of arm 106 is secured to track block 108 by a locating pin 128 extending from arm 106 into a recessed track 130 formed in the top surface 132 of track block 108. The recessed track 130 defines the path of travel of the locating pin 128 (and the proximal end 124 of arm 106) when connector 100 is actuated and arm 106 (and the attached shuttle block 104) is pushed toward or pulled away from track block 108.

[0026] Compression springs 112A, 112B and compression spring bars 114A, 114B extend parallel to the main rod 110 and on opposite sides of the main rod between the proximal end 152 of the shuttle block 104 and the distal end 147 of the track block 108. As described above, in some embodiments, each of the compression springs 112A, 112B may include a helical spring for generating a linear preload force between the shuttle block 104 and the track block 108. The compression spring bars 114A, 114B extending through the compression springs 112A, 112B prevent the compression springs 112A, 112B from buckling and contribute to straight alignment and stability. Together with the compression spring bars 114A, 114B, the main rod 110 aligns the rod block 102 and the shuttle block 104 with the track block 108. Therefore, when the lever block 102 is pushed toward the track block 108, the main rod 110 only allows the lever block 102 and the shuttle block 104 to move linearly relative to the track block 108 along the longitudinal axis of the main rod 110 parallel to the X-axis.

[0027] like Figure 1C As shown, a latch plate 120 extends across the underside of connector 100 between shuttle block 104 and rod block 102. The latch plate 120 secures rod block 102 to shuttle block 104. Latch plate 120 includes three holes (shown as 251 or 252) linearly aligned along its distal end 146, with two side holes 251 located on either side of the central hole 252. Latch plate 120 can be attached to rod block 102 by passing two fasteners 140 through the two side holes 251 in latch plate 120 and screwing them into the two corresponding holes 253 in rod block 102. Latch plate 120 can also be attached to main rod 110 extending through shuttle block 104 by passing fasteners 141 through the central hole 252 in latch plate 120 and screwing them into the distal end of main rod 110. Proximal end 148 of latch plate 120 is removably coupled to shuttle block 104. When the proximal end 148 of the latch plate 120 is disconnected from the shuttle block 104, the rod block 102, the main rod 110 and the latch plate 120 become movable relative to the shuttle block 104 and can be separated from the shuttle block 104.

[0028] Connector 100 is configured to adjustably connect a first object to a second object. The second object can be a stationary object or a stationary surface (e.g., a stationary base or the surface of an object). When the first object is adjustedably connected to the second object via connector 100, the first object can move relative to the second object. Track block 108 includes a plurality of holes 134 for securing track block 108 to the second object. Meanwhile, rod block 102 includes a recess 136 extending through the center of rod block 102. Recess 136 can be used to secure rod block 102 to the first object. Thus, a user can push the first object toward the second object to actuate connector 100.

[0029] Figure 2AAn exploded view of connector 100 according to some embodiments is shown. Figure 2B A partial exploded bottom view of a connector 100 according to certain embodiments is shown, which details the assembly of the shuttle block 104, latch plate 120, rod block 102 and main rod 110. Figure 2C A portion of connector 100 according to certain embodiments is shown in use. Figure 1B The side view of section line 2C-2C is shown in the figure. For clarity, this article also describes it. Figures 2A to 2C .

[0030] like Figure 2A As shown, connector 100 includes a reaction disc 202 and a torsion spring 204 disposed between a mounting member 208 on the top surface 126 of a bobbin 104 and a distal end 122 of an arm 106. The mounting member 208 is disposed near the distal end 250 of the bobbin 104 and configured to mate with the bottom surface of the reaction disc 202. The mounting member 208 is also configured to retain the torsion spring 204, such that the torsion spring 204 is disposed between the mounting member 208 and the reaction disc 202. Figure 2C As shown, fastener 138 is screwed through washer 206, arm 106, reaction disc 202, torsion spring 204 and shuttle block 104 when used to secure arm 106 to top surface 126 of shuttle block 104.

[0031] like Figure 2A As shown, each of the compression spring rods 114A and 114B may include an inner rod 264A or 264B disposed within rod sleeves 266A and 266B. Rod sleeves 266A and 266B may be configured to reduce friction between the compression springs 112A and 112B and the compression spring rods 114A and 114B extending therethrough during use of the connector 100, and to eliminate sliding noise therebetween. In some embodiments, the proximal end 152 of the shuttle block 104 includes a central opening 154 with a pair of openings 156A and 156B on either side of the central opening. The central opening 154 may be configured to receive a main rod 110 such that the main rod 110 can extend through the shuttle block 104 during assembly of the connector 100. Openings 156A, 156B near the central opening 154 at the proximal end 152 of the shuttle block 104 can be configured to receive the distal ends of compression springs 112A, 112B extending between the shuttle block 104 and the track block 108, as well as compression spring rods 114A, 114B. In such an embodiment, the proximal ends of compression springs 112A, 112B and compression spring rods 114A, 114B extending therethrough can be received by the track block 108.

[0032] In some embodiments, openings 156A, 156B in the proximal end 152 of the shuttle block 104 for receiving the distal ends of compression springs 112A, 112B and compression spring rods 114A, 114B can be formed as cylindrical holes or recesses extending partially through the proximal end 152 of the shuttle block 104. The size of openings 156A, 156B can be determined such that the distal ends of compression spring rods 114A, 114B can be press-fitted into openings 156A, 156B and secured to the proximal end 152 of the shuttle block 104. The size of openings 156A, 156B can also be determined to accommodate the compression height of compression springs 112A, 112B when the connector 100 is actuated. Figure 2C As shown, the distal ends of the compression spring 112A and compression spring rod 114A, received by opening 156A, can contact the inner surface of opening 156A in the proximal end 152 of shuttle block 104, such that compression spring 112A and compression spring rod 114A partially extend through the proximal end 152 of shuttle block 104. Similarly, compression spring 112B and compression spring rod 114B, received by opening 156B, can similarly partially extend through the proximal end 152 of shuttle block 104. The partial extension of compression springs 112A and 112B in the openings 156A and 156B of shuttle block 104 allows the distal ends of compression springs 112A and 112B to abut against the proximal end 152 of shuttle block 104.

[0033] Track block 108 may accordingly include a central opening 260 with a pair of openings 258A, 258B on either side for receiving the proximal ends of the main rod 110, compression springs 112A, 112B, and compression spring rods 114A, 114B. In some embodiments, the central opening 260 and the pair of openings 258A, 258B formed at the distal end 147 of track block 108 may extend at least partially through track block 108. The central opening 260 may be configured to slidably receive the proximal end of the main rod 110. The openings 258A, 258B in track block 108 may also be configured to slidably receive the proximal ends of the compression springs 112A, 112B and the compression spring rods 114A, 114B extending therethrough, respectively.

[0034] Therefore, when the connector 100 is assembled, the compression springs 112A, 112B and the compression spring rods 114A, 114B can extend between the openings 258A, 258B in the track block 108 and the openings 156A, 156B in the shuttle block 104. When the connector 100 is in use and the shuttle block 104 is pushed toward the track block 108, since the distal ends of the compression springs 112A, 112B and the compression spring rods 114A, 114B are attached to the proximal end 152 of the shuttle block 104, the main rod 110 and the compression spring rods 114A, 114B can then each slide within their respective openings in the track block 108 to accommodate the reduced distance between the proximal end 152 of the shuttle block 104 and the distal end 147 of the track block 108.

[0035] like Figure 2A and Figure 2B As shown, the shuttle block 104 includes a pair of proximal sidewalls 247A, 247B extending from the proximal end 152 of the shuttle block 104. The proximal sidewalls 247A, 247B extend across a portion of the shuttle block 104 toward the distal end 250 of the shuttle block 104. The shuttle block 104 also includes a pair of distal sidewalls 244A, 244B extending from the distal end 250 of the shuttle block 104 toward the proximal end 152 of the shuttle block 104. Figure 2B As shown, in some embodiments, the distal sidewalls 244A, 244B may extend on the opposite side of the shuttle block 104, between the proximal sidewalls 247A, 247B. In other embodiments, the proximal sidewalls 247A, 247B and the distal sidewalls 244A, 244B may be flush with each other or together formed as a single sidewall on the shuttle block 104.

[0036] Similarly, the latch plate 120 can be secured to the rod block 102 by passing two fasteners 140 through the two holes 251 at the distal end 146 of the latch plate 146 and screwing them into the two corresponding holes 253 in the rod block 102. The rod block 102 can then be aligned with the shuttle block 104 by securing the latch plate 120 to the distal end 111 of the main rod 110 extending through the shuttle block 104. The distal end 111 of the main rod 110 can be secured to the latch plate 120 by passing fasteners 141 through the center hole 252 at the distal end 146 of the latch plate 120 and screwing them into the hole 142 at the distal end 111 of the main rod 110. In order to align the shuttle block 104 and the rod block 102 with the track block 108, the center opening 154 at the proximal end 152 of the shuttle block 104 can be aligned with the center opening 260 at the distal end 147 of the track block 108, such that the main rod 110 extending from the center opening 260 in the track block 108 to the rod block 102 can be inserted through the center opening 154 at the proximal end 152 of the shuttle block 104.

[0037] The proximal end 148 of the latch plate 120 includes a lip edge 249 configured to removably engage the latch plate 120 with the proximal ends 245A, 245B of each of the distal sidewalls 244A, 244B of the shuttle block 104. Figure 2C As shown, the lip edge 249 can removably connect the latch plate 120 to the shuttle block 104 by engaging with the proximal ends 245A, 245B of the distal sidewalls 244A, 244B. When the lip edge 249 engages with the proximal ends 245A, 245B of the distal sidewalls 244A, 244B, the lip edge 249 of the latch plate 120 is positioned between the proximal ends 245A, 245B of the distal sidewalls 244A, 244B and the proximal end 152 of the shuttle block 104, and the latch plate 120 can extend substantially parallel to and contact the bottom surfaces of the distal sidewalls 244A, 244B. Figure 1C As shown, when the lip edge 249 engages with the proximal ends 245A and 245B of the distal sidewalls 244A and 244B, the latch plate 120 can also be disposed between the proximal sidewalls 247A and 247B of the shuttle block 104.

[0038] Typically, latch plate 120 can be used to constrain shuttle block 104 relative to rod block 102 during normal operation of connector 100. In some embodiments, latch plate 120 can also apply maximum tensile load to protect connector 100. In some embodiments, latch plate 120 can be configured to flex or bend such that when excessive tensile force or a load greater than the maximum tensile load is applied to connector 100, lip edge 249 disengages from proximal ends 245A, 245B of distal sidewalls 244A, 244B of shuttle block 104. Disengagement of latch plate 120 from shuttle block 104 allows rod block 102 to temporarily disengage from shuttle block 104 and prevents damage to connector 100. When latch plate 120 flexes, it can react against main rod 110, with shuttle block 104 acting as the medium for flexing.

[0039] In some embodiments, the fastener 141 connecting the latch plate 120 to the main rod 110 can be configured to provide a robust surface-to-surface connection between the latch plate 120 and the main rod 110. During such flexure, the robust surface-to-surface connection provides additional support for the reaction force of the latch plate 120 against the main rod 110. If the rod block 102 separates from the shuttle block 104 due to the disengagement of the latch plate 120, normal operation of the connector 100 may be temporarily halted. However, the connector 100 can be restored to use by re-attaching the latch plate 120 and the rod block 102 to the shuttle block 104 by re-engaging the lip edge 249 of the latch plate 120 to the proximal ends 245A, 245B of the distal sidewalls 244A, 244B of the shuttle block 104.

[0040] Figure 3 Illustrations are shown according to certain embodiments Figures 1A to 1D The diagram depicts an end view of the proximal end 118 of the connector 100. In some embodiments, openings 258A, 258B may extend completely through the track block 108 and may each include annular flanges 302A, 302B extending from the inner surfaces of the openings 258A, 258B in the track block 108. The annular flanges 302A, 302B, defined along the inner circumference of the openings 258A, 258B, may each be formed with an opening concentric with the openings 258A, 258B. The openings in the annular flanges 302A, 302B may each include a diameter whose size is determined to be smaller than the width of each of the compression springs 112A, 112B. Therefore, the annular flanges 302A, 302B allow the corresponding proximal ends of the compression springs 112A, 112B to react against and abut against the annular flanges 302A, 302B in the track block 108 during the assembly of the connector 100.

[0041] Therefore, compression springs 112A and 122B can extend between and abut against the annular flanges 302A and 302B in the track block 108 and the inner surfaces of the openings 156A and 156B at the proximal end 152 of the shuttle block 104 to generate a linear preload force between the track block 108 and the shuttle block 104. The annular flanges 302A and 302B can also be formed and positioned within the openings 258A and 258B of the track block 108 to accommodate sliding movement of the proximal ends of the compression spring bars 114A and 114B in the track block 108 when the shuttle block 104 is pushed toward the track block 108 during use of the connector 100, thereby causing the connector 100 to transition between its latched and unlocked states.

[0042] As described above, when the connector 100 is assembled and actuated, since the distal ends of the compression spring rods 114A and 114B are attached to the proximal end 152 of the shuttle block 104, the proximal ends of the compression spring rods 114A and 114B can slide within the openings 258A and 258B of the track block 108 as the space between the shuttle block 104 and the track block 108 changes. In some embodiments, when the connector 100 transitions between an unlocked state and a latched state, the proximal ends of the compression spring rods 114A and 114B can slide between a distal position and a proximal position in the openings 258A and 258B of the track block 108. When the connector 100 is in the unlocked state, the proximal ends of the compression spring rods 114A and 114B can be in the distal position, which is closer to the distal end 147 of the track block 108 than the proximal position.

[0043] When connector 100 is actuated to switch to a latched state, shuttle block 104 is pushed toward track block 108, which in turn causes compression spring rods 114A, 114B extending from and attached to the proximal end 152 of shuttle block 104 to be pushed toward track block 108. As compression spring rods 114A, 114B are pushed toward track block 108, the proximal ends of compression spring rods 114A, 114B slide from a distal position toward a proximal position (which is farther from the distal end 147 of track block 108 compared to the distal position) to accommodate the reduced space between shuttle block 104 and track block 108. When the proximal ends of compression spring rods 114A, 114B slide to the distal position, compression spring rods 114A, 114B can also slide toward annular flanges 302A, 302B. When connector 100 returns to the unlocked state, the proximal ends of compression spring rods 114A and 114B slide back to the distal position toward the distal end 147 of track block 108 and away from annular flanges 302A and 302B.

[0044] Figure 4 The illustration shows a source from certain embodiments. Figures 1A to 1D The image depicts a top view of the track block 108 of the connector 100. In some embodiments, the recessed track 130 includes a first segment 402, a second segment 404, and a third segment 406 joined together, giving the recessed track 130 a generally triangular shape. Thus, the first segment 402, the second segment 404, and the third segment 406 define and define a central, generally triangular raised surface 408 in the track block 108, the raised surface having a first corner 410, a second corner 412, and a third corner 414. The first segment 402 connects to the second segment 404 at the first corner 410, the second segment 404 connects to the third segment 406 at the second corner 412, and the third segment 406 connects back to the first segment 402 at the third corner 414. The raised surface 408 includes sidewalls 416 adjacent to each of the first segment 402, the second segment 404, and the third segment 406. The first segment 402, the second segment 404, and the third segment 406 define the path of the locating pin 128 as the connector 100 is actuated and transitions between a latched state and an unlocked state.

[0045] When the locating pin 128 is on the first segment 402 and a thrust is applied, the locating pin 128 will move toward the first corner 410 and advance. When the locating pin 128 is on the second segment 404 and a thrust is applied, the locating pin 128 will move toward the second corner 412 and advance. When the locating pin 128 moves from the second segment 404 to the third segment 406, the mechanically generated preload force produced by the combination of the extension force applied by the compressed compression springs 112A, 112B and the torsional preload force applied to the arm 106 by the torsion spring 204 will cause the locating pin 128 to move automatically along the third segment 406 toward the third corner 414 and automatically move around the third corner to the first segment 402. The first corner 410, the second corner 412, and the third corner 414 define points along the recessed track 130 at which the movement of the locating pin 128 (and the arm 106 connected to it) jumps abruptly and irreversibly between two steady states.

[0046] Figure 5A A perspective view of a connector 100, partially exploded according to certain embodiments, with the arm 106 outlined in dashed lines, is shown. Figure 5B A close-up and exploded view of a portion of connector 100 (specifically, the connection of arm 106 to shuttle block 104) according to certain embodiments is shown. Figure 6A and Figure 6B Additional perspective views of the reaction disc 202 and arm 106 according to certain embodiments are shown respectively. For clarity, they are described together herein where appropriate. Figures 5A to 5B and Figures 6A to 6B .

[0047] As shown, a torsion spring 204 is coupled to a reaction disc 202 and positioned between the arm 106 and the mounting member 208 when the connector 100 is assembled. The torsion spring 204 includes a coil 502 with an opening 504, a first arm 506, and a second arm 508. The mounting member 208 includes a bending feature 510 formed on a base 512 of the mounting member 208 and adjacent to the opening 514. The opening 514 is configured to receive a fastener 138 to secure the arm 106 to the shuttle block 104. The bending feature 510 can be configured to align with an adjacent opening 518 on the underside of the reaction disc 202. Figure 6AThe bending feature 516 (shown) engages. The bending feature 510 on the mounting 208 includes a surface 520 and a surface 522. Surface 522 is configured to contact surface 524 on the bending feature 516 when the reaction disc 202 is positioned on the base 512 of the mounting 208. When the reaction disc 202 is positioned on the mounting 208, the opening 518 in the reaction disc 202 aligns with the opening 514 in the mounting 208, such that surface 526 on the bending feature 516 of the reaction disc 202 extends opposite to and faces surface 520 of the bending feature 510 in the mounting 208. When the reaction disc 202 is assembled on the base 512 of the mounting member 208, the torsion spring 204 can be supported between the bending feature 510 of the mounting member 208 and the bending feature 516 of the reaction disc 202, wherein the opening 504 in the coil 502 of the torsion spring 204 is also aligned with the opening 514 in the mounting member 208 and the opening 518 in the reaction disc 202. When the torsion spring 204 is positioned between the bending features 510 and 516, a portion of the first arm 506 of the torsion spring 204 can contact the surface 520 on the bending feature 510 of the mounting member 208, and a portion of the second arm 508 of the torsion spring 204 can contact the surface 526 on the bending feature 516 of the reaction disc 202.

[0048] In some embodiments, such as Figure 5A and Figure 5B As shown, the distal end 122 of the arm 106 may include a containment having a cavity 528 configured to contain the reaction disc 202, torsion spring 204, and mounting member 208 when the arm 106 is engaged with the shuttle block 104. The housing at the distal end 122 of the arm 106 also includes an opening 530 for receiving a fastener 138. The opening 530 is configured to align with an opening 518 in the reaction disc 202, an opening 504 in the torsion spring 204, and an opening 514 in the mounting member 208 when the arm 106 is attached to the shuttle block 104 with the fastener 138.

[0049] In some embodiments, the distal end 122 of arm 106 may further include a first tapering surface 532 extending from the distal end 122 of arm 106 toward the proximal end 124 of arm 106 (in Figure 5B (shown in) and the second tapered surface 534 (in) Figure 6B(As shown in the diagram). The first tapered surface 532 may be opposite to and face the second tapered surface 534, such that a gap is formed between the first tapered surface 532 and the second tapered surface 534, in fluid communication with a cavity 528 at the distal end 122 of the arm 106, to receive the first arm 506 and the second arm 508 of the torsion spring 204. When the arm 106 is assembled with the shuttle block 104 such that the torsion spring 204 is positioned within the cavity 528 of the arm 106, a portion of the first arm 506 contacts the first tapered surface 532, and a portion of the second arm 508 contacts the second tapered surface 534. The contact between the first arm 506 and the second arm 508 of the torsion spring 204 and the first tapered surface 532 and the second tapered surface 534 of the arm 106 enables the torsion spring 204 to apply a torsional preload force to the arm 106 as the arm 106 rotates.

[0050] refer to Figure 5A When the arm 106, the reaction disc 202, and the torsion spring 204 are assembled in the enclosure of the arm 106, and the arm 106 is in the neutral angle position ( Figure 5A (as shown) and set on mounting component 208 ( Figure 1A As shown, a portion of the first arm 506 of the torsion spring 204 near the coil 502 abuts against the surface 520 of the bending feature 510 of the mounting member 208, and another portion of the first arm 506 near its end abuts against the first tapered surface 532 of the arm 106. Correspondingly, a portion of the second arm 508 of the torsion spring 204 near the coil 502 abuts against the surface 526 of the bending feature 516 of the reaction disc 202, and another portion of the second arm 508 near its end abuts against the second tapered surface 534 of the arm 106. The second arm 508 abutting against the surface 526 of the reaction disc 202 applies a rotational force to the reaction disc 202, which in turn causes the surface 524 of the reaction disc 202 to abut against the surface 522 of the mounting member 208. When the arm 106 is in its neutral angle position, the abutment of both the first arm 506 and the second arm 508 of the torsion spring 204 allows the arm 106 to be preloaded in both directions relative to the neutral angle position. In this example, using a torsion spring 204 to create a preload on arm 106, rather than allowing the arm 106 to flex itself, allows arm 106 to be relatively robust and rigid, and enhances the robustness of connector 100 with respect to tension loading. The torsional preload force applied to arm 106 by torsion spring 204 also causes the locating pin 128 extending from the proximal end 124 of arm 106 to press against the sidewall 416 of raised surface 408, thereby eliminating any looseness in the “feel” of connector 100 during assembly, which also contributes to the robustness of connector 100.

[0051] Figures 7A to 7FA perspective view of the connector 100 in operation when a thrust is applied to the lever block 102 according to certain embodiments is shown. Figures 8A to 8F It is shown that, according to certain embodiments, when connector 100 is as follows Figures 7A to 7F The diagram depicts the corresponding view of the position and movement of the locating pin 128 on the track block 108 during operation. As used herein, reference to connector 100 being in the unlocked state corresponds to connector 100 being in a first stable state and lever 102 extending from track block 108 and at the maximum permissible distance from track block 108. Reference to connector 100 being in the latched state, compared to connector 100 being in the unlocked state, corresponds to connector 100 being in a second stable state and lever 102 retracting towards track block 108 and being in a position closer to track block 108.

[0052] As described above, when the connector 100 is assembled, the distal end 122 of the arm 106 is connected to the shuttle block 104 via a fastener 138, around which the arm 106 can rotate. When the user applies a thrust parallel to the longitudinal axis and X-axis of the main rod 110 to the lever block 102 in the direction toward the track block 108, the thrust simultaneously pushes the distal end 122 of the arm 106 connected to the shuttle block 104 toward the track block 108. The thrust causes the locating pin 128 connected to the proximal end 124 of the arm 106 to translate within the recessed track 130 and abut against the sidewall 416 of the recessed track 130. In some embodiments, when the lever block 102 (and the attached shuttle block 104) moves toward the track block 108 in response to the applied thrust, the movement of the shuttle block 104 causes the distal end 122 of the arm 106 to rotate and causes the locating pin 128 to slide against the sidewall 416 and advance counterclockwise around the recessed track 130 in the track block 108.

[0053] Figure 7A The connector 100 is shown in an unlocked state, where it is in a stationary position and ready to be actuated. Regarding the shield example discussed earlier, when the connector 100 is in... Figure 7A In the resting position shown, the shield can be extended and is available for use. In the example shown, arm 106 is in the neutral angle position discussed above, where the torsion spring 204 applies a slight preload force to arm 106. (As corresponding...) Figure 8AAs shown, a locating pin 128 extending from the proximal end 124 of arm 106 rests on the first segment 402 and is adjacent to the third corner 414. In the current first stable state, the locating pin 128 also abuts against the sidewall 416 of the raised surface 308 due to the torsional preload force. To actuate connector 100 and retract lever 102 toward track block 108, lever 102 can be pushed toward track block 108. In the example shown, a thrust 700 is applied to push lever 102 (and the shuttle block 104 attached thereto) toward track block 108.

[0054] Go to Figure 7B and Figure 8B As the shuttle block 104 is pushed toward the track block 108, in some embodiments, the distal end 122 of the arm 106 rotates clockwise about the shuttle block 104 relative to the neutral angle position, and the proximal end 124 of the arm 106 begins to translate about the recessed track 130 in the track block 108. In other embodiments, the connector 100 may alternatively be configured as a mirror image of the example shown, such that when the shuttle block 104 is pushed toward the track block 108, the arm 106 alternatively rotates counterclockwise about the shuttle block 104 relative to the neutral angle position. When the connector 100 is in Figure 1A When a thrust 700 is applied in the unlocked state, the locating pin 128 begins to slide from the third corner 414 toward the first corner 410 along the first segment 402. As the locating pin 128 slides along the first segment 402, the rotation of the distal end 122 of the arm 106 causes the arm 106 to be gradually preloaded further until the locating pin 128 slides past the first corner 410 to the second stable state on the second segment 404. Specifically, during the corresponding rotation of the arm 106 as the locating pin 128 slides along the first segment 402 toward the first corner 410, the second tapering surface 534 of the arm 106 can further press against the second arm 508 against which the torsion spring 204 abuts, while the first arm 506 of the torsion spring 204 continues to abut against the surface 520 of the mounting member 208. Therefore, the rotation of the arm 106 can cause an increase in the torsional preload already present on the arm 106. The range of movement of the locating pin 128 along the first segment 402 can therefore directly correspond to the applied thrust 700. Specifically, the thrust 700 must therefore be sufficiently greater than the parallel component of the increasing torsional preload force applied to the arm 106 and the increasing linear preload force caused by the compression springs 112A and 112B, so that the shuttle block 104 can be pushed toward the track block 108, the arm 106 can be rotated further, and the locating pin 128 can be moved further along the first segment 402 toward the first corner 410.

[0055] If the thrust of 700 is not large enough to move the locating pin 128 past the first corner 410 to the second segment 404 (e.g.) Figure 7C and Figure 8CAs shown), after the thrust 700 is removed, the combination of the parallel component of the torsional preload force caused by the torsion spring 204 and the linear preload force caused by the compression springs 112A and 122B can move the locating pin 128 back to its previous stable state (rest position) near the third corner 414 on the first segment 402 (as shown). Figure 7A and Figure 8A (As shown).

[0056] However, if the thrust 700 is large enough to move the locating pin 128 around the first corner 410 and onto the second segment 404, then the connector 100 will... Figure 7A , Figure 7B and Figure 7C The unlocked state shown has changed to Figure 7D The latching state is depicted. Once the locating pin 128 has slid past the first corner 410 and the thrust 700 is removed, the torsional preload force from the torsion spring 204 will cause the locating pin 128 to slide along the second segment 404 toward the second corner 412. The sliding of the locating pin 128 along the second segment 404 toward the second corner 412 can correspond to the distal end 122 of the arm 106 rotating back toward the neutral angle position. As the locating pin 128 slides along the second segment 404, the torsional preload force that has gradually accumulated since the locating pin 128 reached the first corner 410 can also be reduced. Although the torsional preload force decreases in response to the opposite rotation of the arm 106 and the movement of the locating pin 128 along the second segment 404, some of the torsional preload force on the arm 106 is retained to keep the locating pin 128 against the second corner 412.

[0057] As described above, applying a thrust 700 can cause connector 100 to... Figure 7A The depicted unlocked state changes to as follows Figure 7D The latching state is shown. In Figure 7D and Figure 8D In the position shown. When connector 100 is in the latched state, lever 102 retracts toward track block 108. Regarding the shield discussed earlier, when connector 100 is in... Figure 7D When in the position shown, the cover can be retracted for storage or charging. When connector 100 is in the latched state, with locating pin 128 adjacent to the second corner 412 (as shown...), Figure 8D When (as shown), connector 100 is in the second stable state, and because connector 100 needs to be freely oriented toward the stationary position (as shown) after connector 100 is unlocked. Figure 7A and Figure 8A As shown, when the connector moves back, it may inevitably be subjected to an uncertain amount of tension loading.

[0058] Turning Figure 7E and Figure 8EConnector 100 can be unlocked by applying a second thrust 720 to the lever block 102 toward the track block 108. When the second thrust 720 is applied, the angle of the second segment 404 and the second bend 412, combined with the torsional preload force, guides the locating pin 128 past the second bend 412 toward the third segment 406. Therefore, the applied second thrust 720 must also be large enough to allow the locating pin 128 to slide past the second bend 412 onto the third segment 406 to unlock connector 100. As the locating pin 128 is pushed past the second bend 412, connector 100 can become unlocked and begin to transition to the rest position and unlocked state. Figure 7E As shown, once connector 100 is unlocked by thrust 720, after the second thrust 720 is released, connector 100 will begin to travel along the third segment 406 toward the stationary position. Once the second thrust 720 is released, as connector 100 moves toward... Figure 7A Once the first stable state (stationary position) is reversed, the locating pin 128 will begin to move automatically along the third segment 406.

[0059] Go to Figure 7F and Figure 8F When the second thrust 720 is released, the torsional force caused by the torsion spring 204 causes the positioning pin 128 to move automatically along the third segment 406 from the second corner 412 toward the third corner 414. The movement of the positioning pin 128 along the third segment 406 corresponds to the extension and movement of the lever block 102 (and the shuttle block 104 connected to it) away from the track block 108. The sliding of the positioning pin 128 along the third segment 406 toward the third corner 414 also corresponds to the counterclockwise rotation of the arm 106 relative to the neutral angle position. When the arm 106 rotates counterclockwise, the first tapering surface 532 on the arm 106 can press against the first arm 506 of the torsion spring 204, thereby causing the second arm 508 to abut against the surface 526 of the reaction disc 202. The second arm 508 applies a rotational force to the reaction disc 202 by abutting against the surface 526 of the reaction disc 202, which in turn causes the surface 524 of the reaction disc 202 to further abut against the surface 522 of the mounting member 208. Therefore, the rotation of the arm 106 can cause the torsional preload already present on the arm 106 to increase further as the locating pin 128 moves toward the third corner 414.

[0060] When the locating pin 128 reaches the end of the third segment 406 near the third corner 414, the gradually accumulating torsional preload force from the counterclockwise rotation of the arm 106 as the locating pin 128 travels along the third segment 406 can cause the locating pin 128 to slide around the third corner 414, allowing the arm 106 to rotate back to the neutral angle position. When the locating pin 128 slides around the third corner 414 onto the first segment 402, the connector 100 can reset to the unlocked state and be in a stationary position, as... Figure 7AAs shown. When connector 100 is reset, lever block 102 returns to the extended position relative to track block 108, where connector 100 is ready to be actuated by the next thrust.

[0061] In summary, embodiments of this disclosure provide an apparatus for a robust push-push connector having a mechanism for adjustably coupling a first object to a second object. Specifically, the apparatus is configured to latch and unlock a lever block and a shuttle block connected thereto with a track block. Latching and unlocking further cause the lever block and shuttle block to transition between a first stable state in which the lever block and shuttle block extend from the track block and a second stable state in which the lever block and shuttle block retract toward the track block.

[0062] The connector described above allows the lever block to transition between two stable states in response to a thrust applied to the lever block in a single direction (e.g., toward the track block). The connector includes a rigid and mechanically stable arm that connects the shuttle block to the lever block and can withstand considerable mechanical stress in all positions / states. The arm is coupled to a torsion spring that maintains a slight preload on the arm, and actuation of both the latching and unlocking mechanisms is achieved by applying a thrust in the opposite direction of the preload. Using a torsion spring to create preload on the arm allows for the use of a rigid arm and eliminates any slack in the device. Therefore, the described embodiment provides a robust push-push mechanism.

[0063] Although the foregoing describes embodiments of this disclosure, other and additional embodiments of this disclosure may be contemplated without departing from the essential scope of this disclosure, and the scope of this disclosure is defined by the appended claims.

Claims

1. A push-push device for adjustablely connecting a first object to a second object, the push-push device comprising: A shuttle block, the shuttle block being configured to be coupled to the first object; An arm having a distal end and a proximal end, the distal end of the arm being rotatably coupled to the shuttle block, and the proximal end of the arm being slidably coupled to a recessed track in a track block configured to be coupled to the second object; One or more first springs are disposed between the distal end of the arm and the shuttle block, wherein the one or more first springs are configured to apply a torsional preload force to the arm; and One or more second springs extend between the track block and the shuttle block, wherein the one or more second springs are configured to apply a linear preload force between the distal end of the track block and the proximal end of the shuttle block, and wherein: The distal end of the arm is configured to rotate relative to the shuttle block, and the proximal end of the arm is configured to move along the recessed track of the track block in response to a thrust applied to the distal end of the shuttle block and pointing toward the distal end of the track block. The push-push device is configured to switch between a latched state and an unlocked state as the proximal end of the arm moves along the recessed track in the track block in response to the thrust.

2. The push-push device as described in claim 1, wherein, The recessed track in the track block includes: Define a first segment, a second segment, and a third segment of the raised surface in the track block, the raised surface having a first corner, a second corner, and a third corner, and wherein: The first segment connects to the second segment at the first corner in the raised surface. The second segment connects to the third segment at the second corner in the raised surface, and The third segment connects to the first segment at the third corner in the raised surface.

3. The push-push device as described in claim 2, wherein, The proximal end of the arm is slidably connected to the recessed track via a sliding member configured to slide along the recessed track between a first stable state and a second stable state when the thrust is applied. When the sliding member is in the first stable state, it is on the first segment and adjacent to the third corner, and The sliding member is on the second segment and adjacent to the second corner when it is in the second stable state.

4. The push-push device as described in claim 3, wherein, The push-push device is configured to be in the unlocked state when the sliding member is in the first stable state.

5. The push-push device as described in claim 3, wherein, The push-push device is configured to be in the latching state when the sliding member is in the second stable state.

6. The push-push device as described in claim 3, wherein, The push-push device is configured to transition from the unlocked state to the latched state when the sliding member moves from the first stable state to the second stable state by the thrust.

7. The push-push device as described in claim 3, wherein, The push-push device is configured to transition from the unlocked state to the latched state when the sliding member moves from the first segment over the first corner to the second segment by the thrust.

8. The push-push device as described in claim 3, wherein, The push-push device is configured to transition from the latched state to the unlocked state when the sliding member moves from the second segment over the second corner to the third segment by the thrust.

9. The push-push device as claimed in claim 3, wherein, When the sliding member is in the first stable state when the thrust is applied, the arm is configured to rotate, and the sliding member is configured to move along the first segment toward the first corner.

10. The push-push device as claimed in claim 3, wherein, When the sliding member is in the second stable state when the thrust is applied, the arm is configured to rotate, and the sliding member is configured to move along the second segment past the second corner.

11. The push-push device as claimed in claim 3, wherein, After the thrust is applied to move the sliding member past the second corner and the thrust is released, the linear preload force and the torsional preload force are configured to cause the sliding member to automatically move along the third segment and around the third corner to the first stable state.

12. The push-push device as claimed in claim 3, wherein, The torsional preload force is configured to keep the sliding member abutting against the sidewall of the raised surface inside the recessed track as the sliding member moves along the recessed track.

13. The push-push device of claim 1, further comprising a rod extending between the track block and the shuttle block, wherein, The shuttle block is configured to slide along the rod toward the track block when the thrust is applied.

14. The push-push device of claim 1, further comprising a lever block for connecting the first object to the shuttle block, the lever block being connected to the shuttle block via a latch plate, and wherein, The latch plate is configured to disengage the rod from the shuttle block when the tensile force applied to the rod exceeds the maximum tensile load.

15. The push-push device as claimed in claim 1, wherein, The one or more first springs include one or more torsion springs.

Images