Powered surgical instruments utilize one or more electrical components, such as circuit boards, sensors, motors, etc. to operate various functions of the instrument. Handheld powered surgical instruments may have a corded power supply configuration or may be battery operated. Some battery-operated surgical instruments are powered by a removable battery pack, which is typically discarded after use. Many governing bodies across the globe require batteries to be fully discharged by the time they reach the end of their waste stream. Accordingly, a need exists for a low-cost mechanism that ensures the full discharge of a battery subsequent to the battery's use and prior to disposal.
The present disclosure provides a surgical instrument that includes a handle assembly and a battery assembly configured to removably couple to the handle assembly. The handle assembly includes a handle housing, an electronic component within the housing, a handle finger extending from the handle housing, and first and second electrical terminals electrically coupled to the electronic component. The battery assembly includes a battery housing, a battery cell disposed in the battery housing, first and second battery contacts electrically coupled to the battery cell, and a discharge circuit board. The discharge circuit board is configured to discharge the battery cell and is movable within the battery housing from a first position to a second position by the handle finger upon coupling the battery assembly to the handle assembly. The discharge circuit board includes a first contact pad electrically coupled to the first battery contact, a second contact pad electrically coupled to the second battery contact, and a switch including a first end extending from the second contact pad and a second end movable relative to the first contact pad between a first condition, where the second end is in conductive contact with the first contact pad, and a second condition, where the second end is not in conductive contact with the first contact pad.
In an aspect, the surgical instrument may include an elongated shaft extending from the handle assembly and an end effector operably coupled to the elongated shaft.
In an aspect, the battery assembly may include a retainer configured to maintain the discharge circuit board in the second position after the battery assembly is removed from the handle assembly. Additionally, or alternatively, the retainer may be configured to maintain the discharge circuit board in the first position prior to the battery assembly being coupled to the handle assembly.
In an aspect, the discharge circuit board may further include a plunger positioned under the switch and movable through an opening defined through the discharge circuit board. The plunger may be configured to move the switch upward to disengage the switch from contact with the first contact pad. Additionally or alternatively, the handle finger includes a ramped surface and the plunger may be configured to slide along the ramped surface as the battery assembly is being connected to the handle assembly.
In an aspect, the first contact pad may be electrically coupled to the first battery contact and the second contact pad may be electrically coupled to the second battery contact when the discharge circuit board is in the first position and the second position.
In an aspect, the discharge circuit board may be configured to longitudinally slide along a track of the battery assembly.
In an aspect, the battery housing may include a battery connector and the handle housing may include a handle connector configured to releasably mate with the battery connector.
In an aspect, the first battery contact may be electrically coupled to a first terminal of the battery cell and the second battery contact may be electrically coupled to a second terminal of the battery cell.
Another aspect of the present disclosure provides a battery assembly for use with a surgical instrument. The battery assembly includes a housing, a battery cell disposed within the battery housing, first and second battery contacts electrically coupled to the battery cell, and a discharge circuit board. The discharge circuit board is movable within the battery housing between a first position in the battery housing and a second position in the battery housing. The discharge circuit board includes a first contact pad electrically coupled to the first battery contact, a second contact pad electrically coupled to the second battery contact, and a switch. The switch includes a first end extending from the second contact pad and a second end movable relative to the first contact pad between a first condition, where the second end is in conductive contact with the first contact pad, and a second condition, where the second end is not in conductive contact with the first contact pad. The discharge circuit board is configured to discharge the battery cell when the switch is in the second condition and the discharge circuit board is in the second position.
In an aspect, the battery assembly may further include a retainer configured to maintain the discharge circuit board in the first position and the second position.
In an aspect, the battery assembly may further include a track defined in the battery housing, and the discharge circuit board may be configured to longitudinally slide along the track.
In an aspect, the first battery contact may be electrically coupled to a first terminal of the battery cell and the second battery contact may be electrically coupled to a second terminal of the battery cell.
In an aspect, the discharge circuit board may further include a plunger positioned under the switch and movable through an opening defined through the discharge circuit board. The plunger may be configured to move the switch upward to disengage the switch from contact with the first contact pad.
In an aspect, the first contact pad may be electrically coupled to the first battery contact and the second contact pad may be electrically coupled to the second battery contact when the discharge circuit board is in the first position and the second position.
Another aspect of the present disclosure provides a surgical instrument that includes a handle assembly and a battery assembly configured to removably couple to the handle assembly. The battery assembly includes a battery housing, a battery cell disposed within the battery housing, first and second battery contacts electrically coupled to the battery cell, and a discharge circuit board. The discharge circuit board is movable within the battery housing between a first position in the battery housing and a second position in the battery housing. The discharge circuit board includes a first contact pad electrically coupled to the first battery contact, a second contact pad electrically coupled to the second battery contact, and a switch. The switch includes a first end extending from the second contact pad and a second end movable relative to the first contact pad between a first condition, where the second end is in conductive contact with the first contact pad, and a second condition, where the second end is not in conductive contact with the first contact pad. The discharge circuit board is configured to discharge the battery cell when the switch is in the second condition and the discharge circuit board is in the second position.
In an aspect, the battery assembly may include a retainer configured to maintain the discharge circuit board in the first position prior to the battery assembly being coupled to the handle assembly and maintain the discharge circuit board in the second position after the battery assembly is removed from the handle assembly.
Various aspects of the disclosed surgical instrument are described herein below with reference to the drawings, wherein:
The disclosed powered surgical instruments are described in detail with reference to the drawings in which like reference numerals designate identical or corresponding elements in each of the several views. However, it is to be understood that the aspects of the disclosure described herein are merely exemplary of the disclosure and may be embodied in various forms. Well-known functions or constructions are not described in detail to avoid obscuring the disclosure in unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the disclosure in virtually any appropriately detailed structure.
In this description, the term “proximal” is used generally to refer to that portion of the device that is closer to a clinician during usage of the device in a customary manner, while the term “distal” is used generally to refer to that portion of the device that is farther from the clinician during usage of the device in a customary manner. Further, the term “clinician” is used generally to refer to medical personnel including doctors, nurses, and support personnel.
Many governing bodies across the globe require batteries (e.g., lithium cells) to be fully discharged by the time they reach the end of their waste stream. Handheld surgical instruments can utilize removable battery packs to power the instrument during use in a procedure. If the battery pack is removed from the handheld device, thereby disconnecting the electrical load, prior to being fully discharged, the battery will not meet this requirement and can reach the end of its waste stream with electrical energy still available. The presently described surgical instruments include a mechanism for guaranteeing full discharge of the battery irrespective of whether the battery remains connected to the surgical instrument or is removed from the surgical instrument after use.
Referring initially to
Handle assembly 100 includes a handle housing 101, which houses various electronic component(s) 120 (e.g., circuit boards, motors, sensors, controllers, etc.
With reference to
The discharge circuit board 250 contains a passive resistive load which is conductively coupled to a contact pad 256 (
The battery assembly 200 further includes a spring clip 210 or any other suitable retaining device that is positioned relative to the discharge circuit board 250 such that the spring clip 210 maintains the position of the discharge circuit board 250 in the first position prior to the battery assembly 200 ever being coupled to any handle assembly 100. The spring clip 210 also maintains the discharge circuit board 250 in the second position after the battery assembly 200 is removed from the handle assembly 100.
The handle assembly 100 includes a handle finger 130 extending from the handle housing 101 and a protrusion 135 extending from the handle finger 130. An electrical contact 126 is electrically coupled to the electronic component 120 and is configured to conductively contact a battery contact 216 of the battery assembly 200 to close the electrical circuit, thereby providing electrical power to the electronic components (e.g., electronic component 120) of the handle assembly 100 when the battery assembly 200 is coupled to the handle assembly 100. In an aspect, the electrical contact 126 extends through an opening 137 (
The time to fully discharge the battery cell 206 of the battery assembly 200 depends on the capacity of the battery cell 206 and the resistive load of the discharge circuit board 250. In aspects, the resistive load of the discharge circuit board 250 may be selectable, manually or automatically, to control the discharge rate. Resistors forming the resistive load of the discharge circuit board 250 may be implemented in series and parallel to distribute electrical power as well as add safety redundancies to the discharging function of the discharge circuit board 250.
After being in the disposal state, if the battery assembly 200 is recoupled to the handle assembly 100, the protrusion 135 of the handle finger 130 will slide under the discharge circuit board 250 between the contact pad 256 and the battery contact 216 to break the conduction connection therebetween and enable reconnection of the electrical contact 126 to the battery contact 216.
Referring now to
Handle assembly 100″ includes a handle housing 101″, which houses various electronic component(s) 120″ (e.g., circuit boards, motors, sensors, controllers, etc.,
With reference to
The discharge circuit board 250″ contains a passive resistive load which is conductively coupled to a first contact pad 256″ and a second contact pad 257″ (
The discharge circuit board 250″ also includes a plunger 260″ positioned between the first contact pad 256″ and the second contact pad 257″ an extending through an opening 252″ (
A retainer 210″ extending from a portion of the track 205″ maintains the position of the discharge circuit board 250″ in the first position prior to the battery assembly 200″ ever being coupled to any handle assembly 100″, that is, while the battery assembly 200″ is in a pre-installation state. The retainer 210″ also maintains the discharge circuit board 250″ in the second position after the battery assembly 200″ is removed from the handle assembly 100″, that is, while the battery assembly 200″ is in either of the post-installation state or the disposal state. In an aspect, the retainer 210″ includes a ramped surface extending into the track 205″ against which a proximal surface of the discharge circuit board 250″ rests to retain the discharge circuit board 250″ in the initial, first, position until a force is imparted upon the discharge circuit board 250″ to move the discharge circuit board 250″ along the track 205″ to the second position. When the discharge circuit board 250″ is moved to the second position, a backside of the retainer 210″ rests against a distal surface 254″ of the discharge circuit board 250″ to retain the discharge circuit board 250″ in the second position. The retainer 210″ retains the discharge circuit board 250″ in the second position while the battery assembly 200″ is coupled to the handle assembly 100″ (post-installation state) and after the battery assembly 200″ is removed from the handle assembly 100″ (disposal state). Although described as being positioned within the track 205″ and resting against a distal surface 254″ of the discharge circuit board 250″, the retainer 210″ may be configured in any manner suitable for retaining the discharge circuit board 250″ in the first and second positions.
The battery assembly 200″ also includes a first battery contact 220″ and a second battery contact 240″, a portion of each of which being positioned relative to the track 205″ in which the discharge circuit board 250″ is slidably disposed. In aspects, at least a portion of one of the first battery contact 220″ and the second battery contact 240″ is, or includes, a leaf spring. The discharge circuit board 250″ is movable relative to the first battery contact 220″ and the second battery contact 240″. With brief reference to
The handle assembly 100″ includes a handle finger 130″ extending from the handle housing 101″ and a protrusion 135″ extending from the handle finger 130″. A proximal portion of the handle finger 130″ includes a ramped surface 136″. The protrusion 135″ is positioned such that during the process of coupling the battery assembly 200″ to the handle assembly 100″, the protrusion 135″ engages the distal surface 254″ (
With the battery assembly 200″ removed from the handle assembly 100″, and the discharge circuit board 250″ in the second position, the switch 270″ is no longer prevented from creating a circuit between the first contact pad 256″ and the second contact pad 257″. Thus, in this configuration, with the second battery contact 240′ in conductive contact with a bottom side of the second contact pad 257″, the first battery contact 220″ in conductive contact with a bottom side of the first contact pad 256″, and the switch 270″ forming a connection between a top side of the first contact pad 256″ and a top side of the second contact pad 257″, the circuit between the battery cell 206″ and the resistive load of the discharge circuit board 250″ is closed. The resistive load of the discharge circuit board 250″ will discharge the battery cell 206″ until no more electrical energy is left in the battery cell 206″ of the battery assembly 200″.
The time to fully discharge the battery cell 206″ of the battery assembly 200″ depends on the capacity of the battery cell 206″ and the resistive load of the discharge circuit board 250″. In aspects, the resistive load of the discharge circuit board 250″ may be selectable, manually or automatically, to control the discharge rate. Resistors forming the resistive load of the discharge circuit board 250″ may be implemented in series and parallel to distribute electrical power as well as add safety redundancies to the discharging function of the discharge circuit board 250″.
Detect switch 470 includes a depressible button 472 which is biased outward and configured to be depressed inward when the battery assembly 200″ is coupled to the handle assembly 100″. When the depressible button 472 is in its biased outward position, the detect switch 470 is in an “ON” condition, and when the depressible button 472 is depressed the detect switch 470 is switched to an “OFF” condition. In the pre-installation state, the discharge circuit board 450 is in the first position and is not aligned with or contacting the battery contacts 490, and therefore, is not discharging the battery cell 206″ even though the detect switch 470 is in the “ON” condition. When the battery assembly 200″ is coupled to the handle assembly 100″, the discharge circuit board 450 is moved to the second position, where the discharge circuit board 450 is aligned with the battery contacts 490, and the detect switch 470 is switched from the “ON” condition to the “OFF” condition, thereby opening the circuit of the discharge circuit board 450 and disabling the discharge of the battery cell 206″.
Upon removal of the battery assembly 200″ from the handle assembly 100″, the discharge circuit board 450 is in the second position within the battery assembly 200″ and the depressible button 472 of the detect switch 470 is biased outwardly, placing the detect switch in the “ON” condition and initiating the discharge of the battery cell 206″.
Persons skilled in the art will understand that the devices and methods specifically described herein and illustrated in the accompanying drawings are non-limiting exemplary embodiments. It is envisioned that the elements and features illustrated or described in connection with one exemplary embodiment may be combined with the elements and features of another without departing from the scope of the present disclosure. As well, one skilled in the art will appreciate further features and advantages of the disclosure based on the above-described embodiments. Accordingly, the disclosure is not to be limited by what has been particularly shown and described, except as indicated by the appended claims.
This application claims the benefit of, and priority to, U.S. Provisional Patent Application Ser. No. 63/341,005, filed on May 12, 2022, the entire contents of which are incorporated by reference herein.
Number | Date | Country | |
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63341005 | May 2022 | US |