1. Technical Field
The present disclosure generally relates to human-machine interfaces, and more particularly to sliding switches or sliding variable controls.
2. Description of the Related Art
Various devices exist that allow humans to interact with machines. These include switches, potentiometers, and keyboards. Ingress of moisture and debris into many such devices can cause deterioration or malfunction.
An input device may be summarized as including: a knob including a first magnetic element; a housing; a slider positioned within the housing; a circuitry layer positioned between the knob and the housing; and the slider including a second magnetic element magnetically coupled to the first magnetic element to move the slider within the housing to interact with the circuitry layer as the knob moves.
The circuitry layer and the slider may form a continuously variable resistor. The circuitry layer and the slider may form a single-pole, single-throw switch. The input device may be coupled to an ultrasound system. The housing may be sealed and the slider may be isolated from an external environment. The first magnetic element may be a magnet and the second magnetic element may be a ferrous metal. The first magnetic element may be a ferrous metal and the second magnetic element may be a magnet. The first magnetic element may be a first magnet having a first polarity and the second magnetic element may be a second magnet having a second polarity, the first polarity opposite to the second polarity. The slider may include a conductive pathway. The circuitry layer may be positioned between the knob and the slider or between the slider and the housing. The input device may further include a bezel including a slot, wherein the knob is positioned to slide through the slot.
A method may be summarized as including: positioning a slider including a first magnetic element within a housing; positioning a circuitry layer to communicatively interact with the slider; and positioning a knob including a second magnetic element so the circuitry layer is positioned between the knob and the housing and so the second magnetic element is magnetically coupled to the first magnetic element, so the slider moves within the housing and communicatively interacts with the circuitry layer as the knob moves.
The method may further include moving the knob, thereby moving the slider within the housing such that the slider communicatively interacts with the circuitry layer. Moving the knob may include adjusting a continuously variable electrical signal. Moving the knob may include throwing a single-pole, single-throw switch. Moving the knob may include controlling an ultrasound system. The method may further include sealing the housing and isolating the slider from an external environment. The first magnetic element may be a magnet and the second magnetic element may be a ferrous metal. The first magnetic element may be a ferrous metal and the second magnetic element may be a magnet. The first magnetic element may be a first magnet having a first polarity and the second magnetic element may be a second magnet having a second polarity, the first polarity opposite to the second polarity. The circuitry layer may be positioned to conductively or inductively interact with the slider.
In the drawings, identical reference numbers identify similar elements or acts. The sizes and relative positions of elements in the drawings are not necessarily drawn to scale. For example, the shapes of various elements and angles are not necessarily drawn to scale, and some of these elements may be arbitrarily enlarged and positioned to improve drawing legibility. Further, the particular shapes of the elements as drawn are not necessarily intended to convey any information regarding the actual shape of the particular elements, and may have been solely selected for ease of recognition in the drawings.
In the following description, certain specific details are set forth in order to provide a thorough understanding of various disclosed embodiments. However, one skilled in the relevant art will recognize that embodiments may be practiced without one or more of these specific details, or with other methods, components, materials, etc. In other instances, well-known structures associated with the technology have not been shown or described in detail to avoid unnecessarily obscuring descriptions of the embodiments.
Unless the context requires otherwise, throughout the specification and claims that follow, the word “comprising” is synonymous with “including,” and is inclusive or open-ended (i.e., does not exclude additional, unrecited elements or method acts).
Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. It should also be noted that the term “or” is generally employed in its broadest sense, that is, as meaning “and/or” unless the context clearly dictates otherwise.
The headings and Abstract of the Disclosure provided herein are for convenience only and do not limit the scope or meaning of the embodiments.
Alternatively, the input device 100 can be a completely sealed and enclosed unit that is not connected via cables to other devices, machines, or power sources. For example, the input device 100 can include a wireless communications device such as a radio or Wi-Fi antenna to communicate information about the state of the knobs 108 from the input device 100 to devices or machines being controlled. The input device 100 can also include one or more batteries to provide power to components of the input device 100, such as to internal lighting units of the input device 100.
The illustrated slots 106 are linear, but in different implementations, non-linear slots, such as curved, circular, oval, sawtooth, crenulated, or otherwise non-linearly shaped slots, can be used. In some implementations, the knobs 108 can move (e.g., translate, rotate, and/or pivot) freely, with a desired level of friction or tackiness, or in discrete distances specified by a set of detents, across the input device 100 in two dimensions. For example, a knob 108 can move in a first dimension through a slot 106 and the slot 106 can move in a second dimension, not parallel to the first dimension, across the input device 100. As another example, a knob 108 can be coupled to the input device 100 without being confined to move along the length of a slot. In any of these implementations, the input device 100 can include multiple knobs 108.
In use, the knobs 108 can be moved manually by a user to indicate a desired change in the operation of another device or machine to which the input device 100 is communicatively coupled. In this sense, the input device 100 and knobs 108 provide a generic user interface or human-machine interface. The input device 100 can be particularly useful in specific industries and applications, however. As examples, the input device 100 can be used to control the operation of lights (e.g., stage lighting), vehicles such as automobiles, motorcycles, boats, or aircraft, medical or veterinary devices such as medical imaging systems (e.g., ultrasound systems), entertainment systems such as radios, televisions, stereo systems, or gaming consoles or systems, telephones, cameras, professional audio equipment such as in sound and mixing boards in recording studios, video equipment such as video mixing boards, fitness and exercise equipment such as treadmills, and computers and laptops. In some cases, an input device as described herein can be integrated into another larger control system, such as a television or other remote control, or a keyboard or mouse for use with a laptop or desktop computer. In some cases, an input device as described herein can be used to control the volume (e.g., of a television or stereo system), the brightness (e.g., of lights or a computer screen), or the speed (e.g., of an aircraft or a treadmill), of another external device or machine.
As illustrated in
The circuitry layer 212 can be a printed circuit board or other layer of material that carries or includes electrical circuitry and/or electronic components, such as electrically conductive elements or conductive tracks coupled to a bottom surface 212a thereof, which can interact with the sensory pathways of the magnetically coupled slider 208 to sense, detect, or measure movement of the magnetically coupled slider 208 with respect to the circuitry layer 212. In some cases, the conductive elements or tracks of the circuitry layer 212 can comprise a conductive carbon compound. The circuitry layer 212 can span across an entire upper surface of the housing 210, thereby enclosing the magnetically coupled slider 208 within the channel 216. The sealing layer 214 can be a membrane that spans across the entire upper surface of the circuitry layer 212 and light guide 213 to provide a seal for the circuitry layer 212, for the light guide 213, and for the channels 216. The sealing layer 214 can comprise a material having a relatively small coefficient of friction, or a relatively lubricious material such as a metal, such as brass, to allow other components such as the knob 218 to smoothly slide across it. Alternatively, the sealing layer 214 can comprise a relatively soft sealing material, such as a rubber, plastic, polymeric, elastic, or elastomeric sealing material. The sealing layer 214 can be transparent, and can comprise a decorated overlay that appears black when not back-lit, which can be referred to as having a “dead front.”
The outer frame 202 includes an outer wall 202b and an upper, inwardly protruding lip portion 202a. The lip portion 202a can be engaged with (e.g., adhered to) an upper surface of the sealing layer 214 to sandwich or compress the outer, peripheral edges of the sealing layer 214, light guide 213, and circuitry layer 212 between the lip portion 202a of the outer frame 202 and an upper surface of an outer, peripheral portion of the housing 210, thereby sealing and isolating the magnetically coupled slider 208, circuitry layer 212, and light guide 213 from an external environment. The seal thus provided can be water-tight and air-tight, and can provide a hermetic seal for the conductive circuitry coupled to the magnetically coupled slider 208 and circuitry layer 212.
The bezel 204 can be sized to fit within an inner perimeter of the lip portion 202a of the outer frame 202 so that the bezel 204 can be positioned against the sealing layer 214. As noted above, the bezel 204 can include a plurality of slots 206 extending generally parallel to one another through the bezel 204. Each of the slots 206 can include a relatively wide lower portion 206a and a relatively narrow upper or neck portion 206b. Put another way, the bezel 204 can include a peripheral wall 204a and an upper lip 204b that extends inwardly into the slot 206 from the peripheral wall 204a to form the slot 206. The upper lip 204b and corresponding neck portion 206b can allow the bezel 204 and slot 206 to capture the knob 218 to retain the knob 218 within the slot 206, as described further below.
The knob 218 can include a main body or stem 218a including a relatively wide base portion including a recess for receiving a magnetic element 218b and a relatively narrow top portion. The knob 218 can also include the magnetic element 218b and a bottom cover 218c coupled to (e.g., adhered or mechanically connected via protrusions 218e to) the relatively wide base portion of the stem 218a to cover the recess and magnetic element 218b, sealing the magnetic element 218b within the knob 218. The knob 218 can also include a cap 218d coupled to the relatively narrow top portion of the stem 218a. The bottom cover 218c can be positioned adjacent to or in contact with an upper surface of the sealing layer 214, and can comprise a relatively lubricious material to facilitate sliding of the knob 218 over the sealing layer 214.
The bottom cover 218c and the relatively wide base portion of the stem 218a can be sized to fit within the relatively wide lower portion 206a of the slot 206, and such that they cannot pass through the neck portion 206b of the slot 206. Thus, the knob 218 can be retained within the slot 208. The cap 218d can be coupled to the stem 218a to provide a user with a larger surface or a surface of a material different than that of the stem 218a to interact with, and can also be sized such that it cannot pass through the neck 206b of the slot 206. Thus, if the bezel 204 is removed from the rest of the input device 200, such as for cleaning, the knobs 218 are retained within the slots 206 and cannot pass through the slots 206 in either direction.
In this sense, the knob 218 is permanently coupled to the bezel 204 and therefore is less likely to be lost if and when the bezel 204 including the slots 206 and the knob 218 are removed from the rest of the input device 200, such as to allow the input device 200 to be cleaned. Further, the magnetically coupled slider 208 can remain in a given location while the input device 200 is cleaned. When the bezel 204 including the slots 206 and the knob 218 are returned to the rest of the input device 200, such as after the input device 200 has been cleaned, the magnetic element 218b can be attracted to the magnetically coupled slider 208, causing the knob 218 to slide through the slot 206 to find the given location of the magnetically coupled slider 208. In this way, after cleaning, the knob 218 can automatically return to the last location it occupied prior to cleaning. A user of the input device 200 can also slide the knobs 218 back and forth through the respective slots 206 after returning the bezel 204 to the rest of the input device 200 to restore the engagement between the knobs 218 and the respective magnetically coupled sliders 208.
In some cases, the magnetic element 218b can be a magnet having a polarity complementary to (e.g., opposite) that of a magnet of the magnetically coupled slider 208. Such an implementation can increase the magnetic force attracting the magnetically coupled slider 208 to the knob 218 and can allow the magnetically coupled slider 208 to follow the knob 218 more smoothly, more fluidly, and more precisely, by reducing the effects of friction and resulting jumps in the movement of the magnetically coupled slider 208 through a channel of the housing 210. In other cases, the magnetic element 218b can be a ferrous metal and the magnetically coupled slider 208 can include a magnet. In other cases, the magnetic element 218b can be a magnet and the magnetically coupled slider 208 can include a ferrous metal.
The magnetic element 218b and slider 208 can be in close enough proximity to one another that they magnetically attract one another and are magnetically coupled to one another. In use, a user of the input device 200 can actuate the knob 218 to move through the slot 206. As the knob 218 slides through the slot 206, the magnetic engagement of the magnetic element 218b and the slider 208 can cause the slider 208 to slide through the channel 216. As the slider 208 slides through the channel 216, the conductive pathways on the top surface 208c of the slider 208 can move across the conductive pathways formed on the bottom surface of the circuitry layer 212, thereby changing a control circuit of the input device 200 to cause changes in the operation of an external device or machine.
All of the electrical components and circuitry of the input device 200 can be sealed within the channels 216, and can be 100% isolated from an external environment of the input device 200. Thus, the input device 200 can be used in harsher environments than otherwise. For example, the input device 200 can be used underwater or in dusty or dirty environments without the electrical components being affected by the environment. The input device 200 can be used in close proximity to ultrasound gel or cleaning fluids without adverse effects to the operation of its circuitry. Further, the construction of the input device 200 allows the bezel 204 and knobs 218 to be removed from the rest of the input device 200 relatively easily (e.g., without disconnecting electrical components), such as for cleaning of the bezel 204 and knobs 218, or for other purposes, as necessitated, for example, by harsh environmental conditions.
In some embodiments, the bezel 204 can be back-lit, such as by providing LEDs underneath the sealing layer 214, such as between the sealing layer 214 and the circuitry layer 212 (e.g., mounted on the circuitry layer 212) or within the channel 216, such as at locations corresponding to locations 114 shown in
As illustrated in
As described above, in various alternative embodiments, the slider 208 can comprise a spring finger (e.g., spring finger 208d), thin-coder balls, or an electro-resist film. In some cases, the knob 208 can be pressed by a user, rather than or in addition to being pushed through the slot 206, to activate the electrically conductive elements or tracks coupled to the slider 208 to interact with the electrically conductive elements or tracks coupled to the circuitry layer 212, such as to complete an electric control circuit. In some cases, the electrically conductive elements can be pressure sensitive, such that, for example, the harder a user pushes on the knob 218, the more a resistance of an electric control circuit increases.
As described above, the sensory pathways of the magnetically coupled slider 208 can include electrically conductive elements or electrically conductive tracks which can interact with the corresponding electrically conductive elements or conductive tracks of the circuitry layer 212 to allow presence, absence, position, or movement (e.g., translation, rotation, or pivoting) of the magnetically coupled slider 208 and the knob 218 to be sensed, detected, or measured. In alternative implementations, however, other types of sensory pathways and other modes of interaction between the magnetically coupled slider 208 and the circuitry layer 212, such as non-contact and non-conductive modes of interaction, can be used to allow presence, absence, position, or movement (e.g., translation, rotation, or pivoting) of the magnetically coupled slider 208 and the knob 218 to be sensed, detected, or measured. As examples, the sensory pathways and the magnetically coupled slider 208 can interact with the electrical circuitry and/or electronic components of the circuitry layer 212 using inductive, capacitive, infrared, optical, acoustic, ultrasonic, ferroresistive, magnetoresistive, or other sensing techniques. As a specific example, in implementations in which a knob is not confined to move along the length of a slot, a circuitry layer can include a capacitive or resistive touchscreen to detect the presence, absence, position, or movement of a slider and a corresponding knob.
The magnetically coupled slider 408 can include a magnetic element 408a similar to magnetic element 208a, which can include an electrically-conductive coating, and an outer housing 408b similar to the outer portion 208b, which can comprise a low-friction plastic. The electrically-conductive coating can be a conductive pathway or a sensory pathway. The knob 418 can include a magnetic element 418b similar to magnetic element 218b, and a bottom cover 418c similar to the bottom cover 218c, which can comprise a low-friction plastic.
The circuitry layer 412 can differ from the circuitry layer 212 in that it can omit the electrically conductive tracks of the circuitry layer 212 and include an inductive coil 422, indicated by the dashed line in
The input device 500 can differ from the input device 400 in that, whereas in the input device 400 the circuitry layer 412 including the inductive coil 422 is positioned between the knob 418 and the magnetically coupled slider 408, in the input device 500 the circuitry layer 512 including the inductive coil 522 is positioned below the magnetically coupled slider 508, between the housing 510 and the magnetically coupled slider 508. In both the input device 400 and the input device 500, the respective circuitry layer is positioned between the respective housing and the respective knob.
The method 300 can further include assembling the stem 218a, magnetic element 218b, and bottom cover 218c at 310 to form a portion of the knob 218. The method 300 can further include inserting the stem 218a through the slot 206 of the bezel 204 at 312. The method 300 can further include coupling the cap 218d to the stem 218a at 314 to form the completed knob 218 which is retained within the slot 206 and restrained against motion with respect to the bezel 204 in either direction through the slot 206. The method 300 can further include coupling the bezel 204 and knobs 218 to the outer frame 202 at 316 to position the sliders 208 sufficiently close that the sliders 208 are magnetically coupled to the magnetic elements 218b.
This application claims priority to, and hereby incorporates by reference, U.S. provisional patent application No. 62/165,530, filed on May 22, 2015. Those of skill in the art will recognize that many of the methods or algorithms set out herein may employ additional acts, may omit some acts, and/or may execute acts in a different order than specified. The various embodiments described above can be combined to provide further embodiments.
These and other changes can be made to the embodiments in light of the above-detailed description. In general, in the following claims, the terms used should not be construed to limit the claims to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled. Accordingly, the claims are not limited by the disclosure.
Number | Date | Country | |
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62165530 | May 2015 | US |