DIGITAL EXTENDERS WITH HAPTIC FEEDBACK

Abstract

Certain embodiments are directed to mechanical devices for augmenting dexterous reach and sensing of a user. The devices can include a proximal portion configured to receive an appendage of a user; a distal portion configured detect sensory information; an articulation positioned between the proximal and distal portion to provide for motion of the distal portion via manipulation of the proximal portion; wherein the distal portion comprising a sensing element and the proximal portion comprises a feedback element, the feedback element being connected to the sensing element providing for physical extension of sensory capabilities of the appendage.

Claims

1. A mechanical device for augmenting dexterous reach and sensing of a user comprising: a proximal attachment portion configured to receive an appendage of a user; a distal digital extender portion configured to detect sensory information; an articulation to provide for motion of the distal portion via manipulation of the proximal portion; wherein the distal portion comprising a sensing element and the proximal portion comprises a feedback element, the feedback element being connected to or in communication with the sensing element providing for physical extension of sensory capabilities of the appendage.

2. The device of claim 1, wherein the sensing element is a thermal, capacitive, pneumatic, hydraulic, resistive, vibrational, and/or piezoelectric sensing element.

3. The device of claim 1, wherein the device is configured to translate movement of an appendage to movement of the distal portion.

4. The device of claim 3, wherein the translation is scaled at a scale of 1000:1 to 1:1 to 1:1000 proximal distance moved to distal distance moved.

5. The device of claim 1, wherein the proximal portion is configured to fasten a portion of the appendage.

6. The device of claim 1, further comprising an attachment mechanism to secure the device to a user.

7. The device of claim 6, wherein the attachment mechanism is a glove, sock, wrist strap, ankle strap, or sleeve worn by the user.

8. The device of claim 1, wherein the device is a medical device.

9. The device of claim 1, wherein the device is made of materials that are capable of being sterilized.

10. The device of claim 1, wherein the digital extender of the device is 1 to 24 inches long.

11. The device of claim 1, wherein the digital extender of the device has a maximum cross section of 0.5 to 5 cm.

12. The device of claim 11, wherein the digital extender of the device has a minimum cross section of 0.01 to 4 cm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings form part of the present specification and are included to further demonstrate certain aspects of the present invention. The invention may be better understood by reference to one or more of these drawings in combination with the detailed description of the specification embodiments presented herein. In the drawings, which are not necessarily to scale, like or corresponding parts are denoted by like or corresponding reference numerals.

[0017] FIG. 1 shows one embodiment of the digital extenders with haptic feedback construct.

[0018] FIGS. 2a and 2b show one embodiment of one kinematic control system for the mechanical platform in an extended and a flexed position.

[0019] FIGS. 3a and 3b shows another embodiment of the mechanical system where the proximal stabilization of the proposed invention is incorporated into a glove-like format.

[0020] FIGS. 4a and 4b shows one embodiment from a posterior view to display the mechanical translation of the user's digital movement to that of the distal joint for both extension and flexion.

[0021] FIG. 5A-5F illustrates another embodiment directed to a two digit, actuate digital extender device. FIG. 5A is a top view. FIG. 5B is a first side view. FIG. 5C is a second side view of the embodiment. FIG. 5D is a bottom view of the embodiment. FIG. 5E is a top perspective view of the embodiment. FIG. 5F is a bottom perspective view of the embodiment.

DETAILED DESCRIPTION OF THE INVENTION

[0022] Certain embodiments of the invention provide a physical extension to the fingers (digits) or other appendages while also providing a degree of tactile sensing (haptic feedback) and movement control. Haptic feedback currently exists in robotics technology and within the biomedical engineering field, as a part of robotic surgeries. Most of the current technology investigating haptic feedback or artificial limbs endeavors to replace missing digits or mimic the sensory and kinematic components of fingers for robotic applications.

[0023] Certain configurations are designed to work with fully functioning biological digit(s), serving as an extension of a fully functioning digit(s), particularly for biomedical applications.

[0024] Certain embodiments of a device or apparatus described herein provides a user an extension of their fingers, approximately 4 to 10 inches, in order to extend his or her digital feel and control, possibly for purposes such as performing medical procedures or palpations. Currently, clinical providers use a myriad of medical devices or probes to visualize or manipulate patient anatomy for medical procedures. Digital extenders allow the provider to both locate and treat pathologies through palpation and manipulation without the need for switching tools or imaging.

[0025] The digital extenders platform with haptic feedback may be used to extend the mechanical and sensory reach of a natural digit. The device includes a mechanical platform to translate and replicate motion from the wearer's natural digit to that of the extended mechanical digits. The distal mechanical digit includes a sensory component to detect the distal environment and translate the sensory information to the natural digit. This sensory information may include tactile, pressure, temperature or other signals that transmit meaningful feedback to the user about the distal environment. This device may be used to palpate structures in medical scenarios or austere environments where desired dexterous control and feel are out of reach or unsafe for natural digits. As used herein a tactile sensor generally refers to a sensor that creates an electrically or physically (e.g., pressure, etc.) usable signal from pressure or force generated by contact with objects. Some tactile sensors provide limited information, detecting only whether contact above some threshold force or pressure has been made. Others provide detailed spatial measurements, and can be used to determine the location and magnitude of a force applied to a surface, or to estimate the force and torque applied to a rigid body in contact with several tactile sensors (such as the force and torque exerted on the ground by the sole of a foot). A number of such sensors are known in the art and can be adapted for the purposes described herein. Several modalities for tactile sensing and haptic feedback have been developed and procured involving the translation of sensory input to feedback output through mechanisms such as mechanical actuation, microfluidics, and pneumatics as well as electromechanical systems such as capacitive and resistive technologies. Many of the technologies are readily available on the appropriate scale of the proposed digital extenders platform and could be employed in various implementations according to the environmental constraints or desired functionality.

[0026] FIG. 1 shows one example of a digit extender. The digit extender is an elongated device having a proximal end configured to interact with an users appendage and a distal end configured to provide tactile information to the user. In the particular example illustrated in FIG. 1, the appendage is a finger or fingertip; however, in other embodiments the appendage can be a hand, palm, toe, or foot. The device can be configured to attach directly to the appendage or can be attached to or incorporated in glove, sleeve, sock, strap, or similar article that is worn by the user.

[0027] Referring to FIG. 1, the user places digit 110 in proximal end 112 of the device. The proximal end of the device is configured to fasten digit 110, or other appendage, from the first second or third knuckle or articulation of the finger or other appendage. In a particular aspect the proximal end of the device covers the distal two knuckles. The fingertip or sensing portion of the appendage can be positioned on haptic feedback element 122. In certain aspects the device has a fixed length. In other aspects the length of the device is adjustable and can be lengthened or shortened by the user. The length of the device can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 to 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 inches long, including all values and ranges there between, as measured from proximal end to distal end. In certain embodiments the device is 4 to 10 inches in length. The device can be circular, oval, triangular, square or polygonal solid, matrix, or tube. The solid, matric, or tube need not maintain a consistent cross section and constrict and expand in circumference or analogous dimension along its length. The proximal end can be flattened and the appendage placed upon the proximal end and affixed to the appendage or the proximal end can be configured to receive the appendage inside the proximal end of the device where it is secured once the appendage is appropriately positioned.

[0028] A distal portion 114 extends from the fingertip providing a fingertip extension portion. The distal finger extension has tactile or pressure sensing element 116 that is connected to haptic feedback element 122 and can transmit a sensed signal through connection 118 to haptic feedback element 122 that interfaces with the user's finger or other appendage. Sensing element 116 can use various mechanisms or combination of mechanisms for sensing, including but not limited to thermal, capacitive, hydraulic, or piezoelectric technologies that sense the environment at the distal end of the device (thus physically extending the sensory capability of the user) and translate a meaningful feedback signal to the user's finger that is connected to feedback element 122. The connection between sensing element 116 and feedback element 122 can be a wired or a wireless connection. In certain aspects the device can be moved and/or articulated by the user moving the appendage on which the device is placed or by other manipulation of the device, e.g., dials, gears, wires and such that can be manipulated by a user using an appendage not directly connected to the appendage positioned in the device. The device can have 1, 2, 3, or more articulation points at various lengths along the device. The articulation points can be configured to move in 1, 2, or 3 dimensions, with a first dimension being extension/retraction (x axis), a second dimension being up/down (y axis), and a third dimension being side to side (z axis). Proximal to the distal portion can be one or more an articulation joints that provide sufficient flexibility to the distal portion of the device such that the distal portion can be directed over a required deflection range (180° or more) by the steering mechanism and can be directed to bend in any direction desired about the circumference of the distal portion. In certain aspects the user can select both the amount of bend or articulation and the direction of the bend.

[0029] FIG. 2 shows one example of a kinematic control system for the mechanical platform in an extended position (FIG. 2a) and in a flexed position (FIG. 2b) where the flexion and extension of the user's natural digit corresponds to the flexion and extension of the distal mechanical segment or portion 232. Referring to FIG. 2a and FIG. 2b, the mechanical platform has proximal portion 230 and a distal portion 232 that are connected by an articulation 234. The appendage (finger) 236 is shown operatively positioned and affixed to proximal portion 230. Proximal portion 230 is shown having a fixed arm and a moveable arm to allow for movement of distal portion 232 in relation to proximal portion 230 using articulation 234.

[0030] FIG. 3 shows another embodiment of the mechanical system where the proximal stabilization of the proposed invention is incorporated into glove 338. The embodiment is pictured in extension (FIG. 3a) and flexion (FIG. 3b). Other embodiments may include a glove or sleeve element that extends and encloses the user's finger or other appendage and/or the distal mechanical segments partially or entirely.

[0031] FIG. 4 shows the embodiment of FIG. 3 from a posterior view to display the mechanical translation of the user's digital movement to that of the distal joint for both extension (FIG. 4a) and flexion (FIG. 4b). In one such embodiment, the movement of the user's digit is captured by a proximal mechanical construct (FIGS. 4c and 4e) and translated to the distal mechanical actuation component (FIGS. 4d and 4f). Constant tension may be applied above or below the distal actuation component to aid in overcoming forces for extension or flexion. This may be implemented tension components such as pulleys, spring or elastic materials.

[0032] FIG. 5A-5F shows another embodiment of a digit extender having mount portion 540 at the proximal end and finger mount portion 541, with the digits or finger extension(s) 510 connected to finger mount 541 portion. The device that can have one, two, three, or four digits (or finger extensions). The embodiment of FIG. 5 is a two digit configuration with the digits (510a and 510b) of the device corresponding to the index finger 510a and the middle finger 510b of a user. The device has a proximal end 512 configured to interact with an users appendage and a distal end 514, which can be configured to provide tactile information to the user. In the particular example illustrated in FIG. 5, the appendage is a hand; however, in other embodiments the appendage can be a palm, wrist, toe, or foot. The device can be configured to attach directly to the hand via mount portion 540 or can be attached to or incorporated in glove, sleeve, sock, or similar article that is worn by the user.

[0033] Referring to FIG. 5A, The proximal end of the digit extender includes hand mount 540 that is configured to fit on the back of the hand and positioning the finger mount portion 541 of the digit extender 510 over the users finger or other appendage as the case may be, from the first, second or third joint or biologic articulation of the finger or other appendage. Hand mount 540 and finger mount 541 can be attached via articulation 560. Digital extender 510 has at least a first articulation/joint 549 and can include a second articulation/joint 550, or additional articulations or joints. In a particular aspect, the finger mount portion 541 of the device covers the distal two joints. In other aspects the digital extenders, finger mount portion, or the finger mount portion and digital extender covers all joints or articulations of the appendage (e.g., the finger). The fingertip or sensing portion of the appendage can be positioned on a haptic feedback element positioned in finger mount portion 541. In certain aspects the device or digit extender portion 510 has a fixed length. In other aspects the length of the device or digit extender portion 510 is adjustable and can be lengthened or shortened by the user. The length of the device or the digit extender 510 can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 to 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 inches long, including all values and ranges there between, as measured from proximal end to distal end. The digit extender 510 has a proximal mounting portion 551 that is configured to attach to finger mount portion 541, the length of digit extender 510 is measured from the beginning of the proximal portion 551 to the distal end of the digit extender 510 when full extended. In certain embodiments the device or digit extender 510 is 4 to 10 inches in length. The distal portion of digit extender 510 (i.e., that portion of 510 not including proximal portion 551) can be a circular, oval, triangular, square or a polygonal solid, matrix, or tube. The digit extender 510 need not maintain a consistent cross section and may constrict and expand in circumference or analogous dimension along its length. The proximal end of digit extender 510 is configured to receive the appendage (e.g., finger) inside the proximal end of the digit extender where it is secured once the appendage is appropriately positioned.

[0034] A distal portion (including a first distal portion 548, a second distal portion 552, and a tip portion 553) extends from the proximal portion (551) providing an extension of the finger. Digital extender 510 can have 1, 2, 3, or more articulation points connecting at various lengths along the device, e.g., connecting first distal portion 548 to second distal portion 552, or second distal portion 552 to tip portion 553. The articulation points can be configured to move in 1, 2, or 3 dimensions, with a first dimension being extension/retraction (x axis), a second dimension being up/down (y axis), and a third dimension being side to side (z axis). Proximal to the distal portion can be one or more articulation joints that provide sufficient flexibility to the distal portion of the device such that the distal portion can be directed over a required deflection range (180° or more) by the steering mechanism and can be directed to bend in any direction desired about the circumference of the distal portion. In certain aspects the user can select both the amount of bend or articulation and the direction of the bend. Tip portion 553 can have tactile or pressure sensing element(s) that are connected to a haptic feedback element and can transmit a sensed signal through connections to a haptic feedback element that interfaces with the user's finger or other appendage. A sensing element can use various mechanisms or combination of mechanisms for sensing, including but not limited to thermal, capacitive, hydraulic, or piezoelectric technologies that sense the environment at the distal end of the device (thus physically extending the sensory capability of the user) and translate a meaningful feedback signal to the user's finger that is connected to the feedback element. The connection between sensing element and feedback element can be a wired or a wireless connection.

[0035] In certain aspects the device can be moved and/or articulated by the user moving the appendage on which the device is placed or by other manipulation of the device, e.g., dials, gears, wires and such that can be manipulated by a user using an appendage not directly connected to the appendage positioned in the device. The device can also include actuators 547 that are mounted on the hand mount, as an example.

[0036] The device can include kinematic control system for the flexion and extension of the user's natural digit to control the flexion and extension of digit extender 510 or a portion thereof. The mechanics of control system includes gears and mechanics (i.e., mechanism, which can also include pulleys, levers, strings, wires and the like) 555 configured to transfer the movement of a user's to movement of the digit extender 510, and one or more trigger 556 configured to allow manipulation of the extended digit 510 by moving the user's appendage. The mechanism and trigger are coupled to allow for movement of the digit extender. The user's appendage (e.g., finger) can be inserted into the finger mount and in position relative to trigger(s) to provide for manipulation of the device during use. The movement of the user's appendage can be captured or translated by a mechanical construct and translated to the digital actuation component. Constant tension may be applied above or below the digital actuation component to aid in overcoming forces for extension or flexion. This may be implemented by tension components such as actuators, pulleys, spring or elastic materials.

[0037] The distal tip can be configured for grasping, palpating, or moving structures (e.g., biological structures such as tissues or organs).

[0038] The device can be configured to be inserted in body openings (e.g., mouth, trachea, esophagus, vagina, rectum, etc.), or in surgical openings (e.g., during laparoscopy).

[0039] In certain embodiments, the device can be a fixed length device or an adjustable length device. In certain aspects the device is a telescopic device that can be adjusted before, during or before and during use.

[0040] The device can be manufactured from and/or coated with various materials or combinations of material. In certain aspects the material can include metallic materials including but not limited to stainless steels (SUS) such as SUS304, SUS316L, SUS420J2, and SUS 630, gold, platinum, silver, copper, nickel, cobalt, titanium, iron, aluminum, tin, various alloys such as a nickel-titanium (Ni—Ti) alloy, a nickel-cobalt (Ni—Co) alloy, a cobalt-chromium (Co—Cr) alloy, and a zinc-tungsten (Zn—W) alloy, metal-ceramic complexes, and the like. The material may be used alone, or two or more kinds among the above may be used concurrently. The device can also include polymer materials. Polymers include, but are not limited to polyamide resins such as Nylon 6, Nylon 11, Nylon 12, and Nylon 66 (all of which are registered trademarks), polyolefin resins including polyethylene resins such as Linear Low-Density Polyethylene (LLDPE), Low-Density Polyethylene (LDPE), High-Density Polyethylene (HDPE), and Ultra High Molecular Weight Polyethylene (UHPE or UHMWPE), or polypropylene resins, modified polyolefin resins, epoxy resins, urethane resins, diallyl phthalate resins (allyl resins), polycarbonate resins, fluororesins, amino resins (urea resins, melamine resins, and benzoguanamine resins), polyester resins, styrene resins, acrylic resins, polyacetal resins, vinyl acetate resins, phenol resins, vinyl chloride resins, silicone resins (silicon resins), polyether resins, polyimide resins, and the like. The polymer material may be used alone, or two or more kinds among the above may be concurrently used.

[0041] In certain embodiments the device can include other accessory devices such as a camera, clamp, scalpel, and the like.