JP4223213B2 - Flexible switch member for manual handpiece switch - Google Patents

Description

[0001]
Cross-reference to related applications
This application is a US Patent Application No. 60 / 242,272 “Flexible Membranes for Hand Activation Handpiece Switches” filed Oct. 20, 2000, which is incorporated herein by reference, and filed Oct. 20, 2000. Alleged benefit based on both published US Patent Application No. 60 / 241,889 “Detention Circuitry for Surgical Handpiece System”.
[0002]
BACKGROUND OF THE INVENTION
The present application relates to an ultrasonic surgical system, and more particularly to a switch member having a film seal that prevents a switch assembly provided in an internal switch chamber formed in a surgical handpiece from contacting gas or water vapor.
[0003]
[Prior art]
It is known that an electric surgical scalpel and laser can be used as a surgical device that performs two types of functions of simultaneously performing incision and hemostasis of soft tissue by cauterizing tissue and blood vessels. However, such devices use extremely high temperatures to form a solidified state, resulting in vaporization and fuming and splashing. In addition, the use of such devices often forms a relatively wide thermal tissue damage area.
[0004]
Cutting and cauterization of tissue with a high-speed oscillating surgical blade by an ultrasonic drive mechanism is also well known. In such a system, the ultrasonic generator is equipped with an ultrasonic generator that generates an electrical signal of a specific voltage, current and frequency of, for example, 55,500 cycles per second. The generator is connected to a handpiece via a cable, which contains a piezoelectric ceramic element to form an ultrasonic transducer. In response to a foot switch connected to the generator by a switch on the handpiece or another cable, the generator signal is fed to the transducer, causing longitudinal vibrations in the element. A structure connects the transducer to the surgical blade, which causes the surgical blade to vibrate at an ultrasonic frequency when a signal from the generator is supplied to the transducer. Since the structure is configured to resonate at a predetermined frequency, the operation initiated by the transducer is amplified.
[0005]
To vibrate and activate the surgical handpiece for use, the user operates a switch mechanism. The switch mechanism basically has one or more buttons, and the user presses the button to vibrate the blade. The electrical part inside the switch mechanism of the handpiece needs to be sealed so as not to be damaged from the outside when the handpiece is cleaned or used. This is especially important for handpieces that support the use of autoclaves and water disinfection. Therefore, a coating (eg, a flexible seal) must seal the electrical components of the switch mechanism as part of the switch portion so that the electrical components are not damaged when cleaning or using the handpiece. .
[0006]
Generally, the switch member (including the button portion) is made of a resilient material such as an elastomer material, and seals between the switch member and the handpiece. The elastic switch button has poor moisture resistance (water vapor) and is not particularly suitable for preventing moisture intrusion when using an autoclave. Elastomer materials have the disadvantage of being pierced with sharp instruments. Moreover, if moisture enters the elastomeric material while using the autoclave, there is no quick way to remove this moisture from the handpiece at the end of the autoclave. Moisture present in the electrical components inside the handpiece can cause damage or malfunction of the handpiece and shorten its life.
[0007]
When the switch member is formed of an elastomer material, an integral elastic film can be provided around the switch member. This elastic coating is often shown as a “web” or a skirt that serves to easily return the switch body to its original position when the switch body is pushed down or released. In the use of a web made of this thin elastomer material, there are at least two disadvantages as part of the rocker switch body. First, the periphery of the web has a relatively thin cross section, and the durability when a sharp instrument hits the bent portion (web) is poor, and the puncture resistance is limited. Second, the web film is thin and penetrates air and moisture, so it is not strong to seal. In other words, the web film is a material sufficient to penetrate air and moisture.
[0008]
As an example with difficulty using a permeable switch member, the compatibility with the autoclave process is raised. When the rocker switch member is applied to seal the inner space portion of the handpiece, the pressure in the inner space portion is higher than the outside of the inner space portion due to the vacuum state of the autoclave. Since the switch member is limited in the outward urging force, it cannot cope with high atmospheric pressure. As a result, pressurized air leaks through the thin web coating. Pressurized air can be discharged from other parts of the switch member body. However, while the autoclave is repressurized to the normal pressure, the switch member warps downward with the pressure reduced in the inner space. As a result, the switch member is pulled downward, and the state is similar to someone pushing the switch member. The switch member thus compensates for the pressure to be equal, but there is a pressure difference that is not appropriate for drawing air back through the web membrane. This results in the switch member being continuously pressed despite the absence of a user. When the switch member is in the depressed position, the switch mechanism reacts unnecessarily and produces undesirable results.
[0009]
[Problems to be solved by the invention]
Although conventional coatings are suitable for some purposes, there is a need for coatings that prevent moisture penetration, stop gas vapor and gas (air) permeation, and have improved puncture resistance.
[0010]
[Means for Solving the Problems]
The present application provides a method and switch member for controlling liquid flow (water vapor flow, gas such as air) through a switch member used to seal the interior of a surgical handpiece, and to operate the handpiece. A pressing member is provided. The switch member has improved sealing properties that prevent fluid movement through the entire switch member or at least functional portions (eg, skirts) and inflow and outflow within the sealed switch chamber. This switch member also prevents puncture by a surgical instrument or a cleaning instrument.
[0011]
This switch member is particularly useful for handpieces that use autoclaves. The pressurized state and vacuum state of the autoclave cause the flow of gas and water vapor across the conventional switch member and particularly the entire thin skirt. In this application, there are various methods for controlling the flow of gas and water vapor in a push-down switch member (particularly a thin skirt) that can be used in an autoclave environment or other environments without the disadvantages associated with conventional members. Disclose.
[0012]
Other features and advantages will become apparent from the following detailed description when read in conjunction with the accompanying drawings.
The foregoing and other features will become apparent from the detailed description when read in conjunction with the illustrated embodiments. The description of the accompanying drawings is as follows.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 depicts an exemplary surgical incision and hemostasis system according to an embodiment, generally designated 10. In this exemplary embodiment, system 10 is an ultrasonic surgical system. The system 10 includes a console or housing 20 for accommodating an ultrasonic generator (not shown), and a control system provided inside the console 20 constituting a part of the system 10. The first cable 22 connects the console 20 and the handpiece 30 and allows an electrical connection therebetween. The first cable 22 includes a first wire bundle (not shown) that provides electrical current, ie, a drive current that is sent from the console 20 to the handpiece 30 that transmits ultrasonic longitudinal vibrations from the console 20 to the surgical instrument 11. ) Is included. The surgical instrument 11 is preferably a surgical scalpel or scissors. This instrument 11 can be used for simultaneous incision and cauterization.
[0014]
Supply of ultrasonic current to the handpiece 30 is controlled by a switch mechanism 40 provided in the handpiece 30. As will be seen in more detail below, the switch mechanism 40 is electrically connected to the console 20, particularly the generator, by one or more wires (not shown) of the first cable 22. . The ultrasonic generator can also be optionally controlled by a foot switch 50 connected to the console 20 by a second cable 60. Thus, in use, when the surgeon operates the switch mechanism 40 or the foot switch 50 of the handpiece 30 to give an ultrasonic electrical signal to the handpiece 30, the instrument 11 vibrates in the longitudinal direction at the ultrasonic frequency. To do. The switch mechanism 40 is activated by the surgeon's hand, and the foot switch 50 is activated by the surgeon's foot.
[0015]
The console 20 has a liquid crystal screen device 24 that is used to display the incision power level selected in various ways, such as maximum incision power or numerical power level. The liquid crystal screen device 24 is also used for displaying other parameters of the system. A power switch 26 and a power “on” display 28 are also provided on the console 20 to allow the user to further control the system 10. Additional buttons and control switches, indicated generally at 70, may be located on the front panel of the console 20 and control various functions of the system 10. When power is applied to the ultrasonic handpiece 30 by operating the switch mechanism 40 or the switch 50, the surgical knife or instrument 11 vibrates in the longitudinal direction according to the amount of driving power (current) selected by the user. To do.
[0016]
Next, FIGS. 1 to 4 will be described. One exemplary switch mechanism 40 is shown in detail in FIG. The handpiece 10 includes a switch end cap 90 attached to the handpiece body 92. The switch mechanism 40 includes, for example, one or more complex electrical components of the circuit board 80 and one or more push-down switch members 82 that allow the user to operate the switch mechanism 40 when it is activated or deactivated. ing. For the purpose of illustration only, each switch member 82 is represented in the form of a rocker type switch. However, there are various types of switch members 82 and types of switch members to be pushed. There is no limit. The typical switch member 82 includes a main body 83 (here, a rocker type main body) and a skirt 85 extending around the main body 83. The switch member 81 seals the inside of the handpiece 10 and thus serves as a barrier for water vapor and gas (that is, a liquid and gas permeable wall). Preferably, the main body 83 and the skirt 85 function as a transmission wall. The switch member 82 also includes a pair of spaced pillars 87 extending outwardly from the body 83 provided to actuate the switch mechanism 40 (FIG. 1) upon contact (not shown). The column 87 should not extend below the plane including the lower surface of the skirt 85 in an uncompressed state. This is because the pillars 87 are preferably made of an elastomer material like the main body 83 and the skirt 85, and the force on the upper surface of the main body 83 above the pillars 87 drives the respective pillars 87 downward, and the skirt 85 This is because it extends beyond the surface including the lower surface of the film. This is the position of the switch member 82 during compression.
[0017]
In the illustrated embodiment, the switch end cap 90 is associated with two opposing switch members 82 that connect to the switch end cap 90. The switch end cap 90 includes an outer casing that covers an electrical switch portion such as the circuit board 80. Since each switch member 82 is linked to the switch mechanism 40, an opening is provided in the outer casing 94 so that the switch member 82 fits the switch mechanism 40, thereby generating a signal by the switch mechanism 40, This is transmitted to the console 20 so that the piece 10 can be operated.
[0018]
This handpiece 10 is preferably intended for use in the surgical system disclosed in US patent application Ser. No. 09 / 693,621 “Ultrasonic Surgical System” filed Oct. 20, 2000. No. 09 / 693,549 filed Oct. 20, 2000, “Conductive Finger Adapter Retention to reduce number of Conductors”. These are hereby incorporated by reference.
[0019]
In one aspect, an improved switch member 82 comprising an elastic rocker type switch button is disclosed herein. Here, the term “elastic” is used, but the switch member 82 is deformed when force is applied to a plastic or other material (such as a compressible metal) suitable for this. May also be configured. Furthermore, although this disclosure focuses on the switch member used in the switch mechanism, there are some plastic members such as seals and walls that can substitute the switch membrane for other types. In addition, although the typical switch member is here a rocker type, the intent herein includes other types of switch members. Accordingly, the description and illustration of the rocker type switch member is merely exemplary and not limiting.
[0020]
With reference to FIGS. 3-5 (b), in one exemplary embodiment, a metal layer 110 is added to an elastomeric rocker type member 82 as shown in FIG. 5 (a). If possible, the skirt 85 is preferably integrated with the main body 83. More specifically, the metal layer 110 is attached to the lower surface 112 of the rocker switch member 82 made of elastomer. This layer 110 may be composed of any number of suitable metals such as aluminum, gold, titanium, platinum and the like. This layer 110 is made of a thin metal layer and is attached to a predetermined cut surface of the main body 83 and the lower surface 112 of the skirt 85. For example, the complete lower surface 112 (including the body 83 and the skirt 85) may be coated with a metal layer 110 with a thin coating (eg, can be approximately 5 microinches to approximately 0.0005 inches thick). In some cases, the metal layer 110 is applied only to the skirt 85 of the switch member 82. The metal layer 110 dramatically reduces the flow rate of water vapor and gas in the coated portion such as the lower surface 112. Since this layer 110 is very thin, this layer 110 is flexible and does not interfere with the flexibility of the elastic portion (switch member 82). The presence of the metal layer 110 improves the sealing action of the switch member 82. The metal layer 110 may be formed not only on the lower surface 112 but also in an intermediate layer between the upper surface of the switch member 82 and the lower surface 112. The metal layer 110 may be applied only to the intermediate layer of the skirt 85. Furthermore, the metal layer 110 may be used by itself on the upper surface of the skirt, or may be disposed on the lower surface 112 or intermediate layer along with others. This metal layer 110 can be applied with conventional techniques, i.e. a thin metal layer on the body, i.e. spray equipment or other types of equipment that can produce a uniform thickness. Other methods for applying the metal layer 110 include, but are not limited to, ion beam deposition, gas metal deposition, and chemical vapor deposition.
[0021]
In another embodiment shown in FIG. 6, a thin flexible substrate 120 is provided and coated with a metal layer 122. The substrate 120 is preferably formed of a flexible material such as polyurethane, vinyl, silicon, thermoplastic elastomer material, polyvinylidene fluoride, polyparaphenylene terephthalamide, polyimide or mixtures thereof. For example, if the polyimide film is applied together with the FEP fluoropolymer resin, it has moisture resistance, and it is difficult for the instrument to puncture the member. In the exemplary embodiment, the thickness of the substrate 120 is approximately 0.0005 inches to approximately 0.003 inches. The metal layer 122 may be composed of a metal suitable for it, such as aluminum, gold, titanium, platinum, or the like alone or as a mixture. The metal layer 122 is preferably thin, but at the same time, it is preferable that the metal layer 122 is formed of a metal having a slow flow rate of water vapor and gas. The thickness of the metal layer 122 is about 5 microinches to about 0.0005 inches in one embodiment. This metal layer 122 is formed on the first surface 124 of the thin flexible membrane substrate 120. The second surface 126 facing the thin flexible membrane substrate 120 is added to or opposed to the lower surface 112 of the elastic rocker switch member 82 when the handpiece 30 is assembled. In the embodiment, the substrate 120 is an adhesive and is attached to the lower surface 112 of the switch member 82. The thin flexible membrane substrate 120 may be positioned on or just below the lower surface 112. As an example, the thin flexible membrane substrate 120 may form a stratified contact with the elastic rocker switch member 82 such that the metal layer 122 faces away from the elastic rocker switch member 82 as shown in FIG. . The thin flexible membrane substrate 120 can be placed adjacent to the elastic rocker switch but away from it. It is assumed that the substrate 120 is applied to a position selected in the lower surface 112. For example, the substrate 120 is used only on the lower portion of the skirt 85 or on the entire lower surface 112.
[0022]
In other embodiments in FIGS. 1-4, the flow rate of water vapor and gas is reduced by structurally changing the surface, such as the lower surface 112 of the elastic switch member 82, by an ion implantation process. In the ion implantation step, the surface property of the switch member 82 can be modified while keeping the bulk property in that state. The treatment can be a thin layer attached to the lower surface 112 and / or the upper surface of the member 82 or the member 82, thereby forming a three-dimensional polymer chain cross-link. Again, the surface treatment is performed on the entire surface or only selected surfaces, such as only the bottom of the skirt 85. If a suitable ion implantation process is performed, water vapor and gas cannot pass through the elastic switch member 82 because a permeation barrier is created, so that the hole diameter / breathability of the member 82 is reduced and the flow of water vapor and gas is reduced. The speed decreases as well. Another advantage of using an ion implantation process is seen in the durability of the switch member to puncture and the improvement in surface hardness, thereby reducing the likelihood of puncture. For example, in a general sterilization process (autoclave process), a tool such as a wire brush is used to destroy a weak conventional switch film.
[0023]
Another way to modify the surface of the member 82, such as the lower surface 112, is to shallow melt or heat fuse the surface to bind surface molecules more tightly. In one way to achieve this goal, the molecules become more strongly bonded when performing a laser baking process that modifies the lower surface 112 and / or the lower surface 112 and the upper surface. This makes it difficult for a gas such as water vapor or air to pass through the lower surface 112, and a reduction in the flow rate of water vapor and gas can be realized. Since low gas permeable materials such as ceramics, metals, polymers, etc. can be placed on the lower surface 112 using ion beam melting and low temperature arc vapor melting, water vapor and gas diffusion walls are provided. Ceramics used here include alumina and silicon dioxide, and metals include aluminum, gold, titanium, platinum, alloys, or combinations thereof, which can be used as a continuous layer, but are not limited to these. Absent. The entire lower surface 112 of the body 83 and skirt 85 or the surface of a selected portion is processed. For example, only the lower surface of the skirt 85 may be surface-treated.
[0024]
Any pressure differential problems that occur across the member 82, such as during an autoclave cleaning process, can be reduced slightly by reducing the amount of air in the sealed switch chamber below the member 82. By filling the cavity area below the member 82 and reducing the amount of air below the member 82 affected by heat and pressure, the detrimental effect of the switch member 82 is reduced. This is particularly noticeable when force is applied to the member 82 in applications such as autoclave processes. The need for space to allow movement of the pillar 87 or such structure when the member 82 is depressed or returned to the uncompressed position in a small area under the member 82 may be appreciated.
[0025]
As shown in FIG. 7, the elastic switch member 82, particularly the user, operates a petroleum product such as oil or a fat film 130 by another method in order to reduce the water vapor and gas permeability. There is also a method of applying to the lower surface 112 that is sometimes unobstructed. For example, petrolatum 130 can be applied to the entire lower surface 112 or selected portions. This oil or fat film 130 can be further prevented from moving by placing the laminate material 140 on the oil or fat film 130. The laminate material 140 serves as a cover that holds and contains the oil or fat film 130. In a similar manner, silicone oil or other types of consistent oils or fats are mixed into the elastic rocker switch member 82. This reduces the water vapor and gas permeability. Again, a barrier film such as laminate material 140 is used to prevent the remaining oil from penetrating into areas that are vulnerable to oil.
[0026]
The water vapor or gas permeability of the elastic switch member 82 is determined by placing the elastic switch member 82 in a low temperature environment to recognize and / or more strongly bind and / or purify the molecular microcrystal structure of the elastic member 82. Can be reduced. As a result, the air permeability and the water vapor and gas permeability are lowered, and the gas blocking rate of the elastic switch member 82 is raised. One technique suitable for this is to place the elastic member 82 in liquid nitrogen whose temperature is gradually adjusted. When this technique is applied, there is an advantage that the elastic member 82 is further tough (strong) and hardly damaged. This is particularly effective for thin coatings that are frequently subjected to severe bending or contact with sharp instruments.
[0027]
A further understanding can be gained by those skilled in the art by applying combinations of prior art to the present invention. For example, the relatively thick elastic switch member 82 can be used by applying a fat film to a thin flexible joint. As another example, a hard and low-periphery surrounding switch button that is easy to bend (such as a non-elastic switch button that is relatively permeable and easy to bend) results in a thin bend around the body. Forming a skirt is raised. The resulting assembly has a small surface area with a high vapor transmission rate, so that the amount of vapor passing through the handpiece 10 is small.
[0028]
According to FIG. 8 (a) and the present invention, the web coating region (eg, the skirt surrounding the rocker body) of the rocker switch member 200 is made of polyimide, polyester, polyparaphenylene terephthalamide, and other thermoplastic elastomer materials. Thus, the material 210 (hereinafter referred to as a puncture-resistant skirt) that is strong against damage and easily bent is substituted. In an exemplary embodiment, the puncture resistant skirt 210 has a thickness of about 0.0005 inches to about 0.003 inches. One way to create such a device 200 is to attach a rocker-shaped component 83 onto a puncture-resistant skirt 210, which is advantageous in terms of puncture resistance over thin walled elastic materials. A locker with a flexible web area can be provided. Another method is to put the form of the puncture-resistant skirt 210 into the locker body, so that an integrated body made of two materials that combines the advantages of a rocker with features and a durable web (skirt). Can be formed. The puncture resistant skirt 210 functions as the skirt 85 of FIG.
[0029]
Flexibility and replacement performance can be enhanced when the fold or roll 220 is finished into a puncture resistant skirt 210 as shown in FIG. Since the puncture-resistant skirt 210 has high fracture resistance, the bent portion is substantially less likely to be broken than the elastic web (skirt) when struck by a sharp object. These folds / rolling rolls 220 serve to return the rocker 200 to an upper position like a spring when the force pushing the rocker 200 disappears. These folds / rolling rolls 220 also have a role of enabling the user to feel with a return snap action. A spring or dome (not shown) may be used under the rocker 200 when a means is needed to assist the rocker up or completely when the rocker 200 is opened. Plastic springs / domes are particularly useful because they are not attacked by water vapor or heat. Also, the puncture resistant skirt 210 has improved resistance to the flow of air through it, thus reducing the permeability of the rocker 200. This reduction in permeability helps the rocker to operate correctly during and after use of the autoclave.
[0030]
In addition, choosing a film that forms a puncture-resistant skirt 210 or an auxiliary coating with a relatively friction-free smooth surface (compared to a high-friction elastomeric material) allows for cleaning / use Prevents puncture / cracking. Suitable materials that do not easily cause friction are polyamide, polyester, polytetrafluoroethylene material, titanium titanium, and the like, but are not limited thereto. As an example, when a tool such as a brush sticks on a slippery member, it does not pierce as compared with a conventional elastic member but slides sideways. Thus, when the puncture-resistant skirt 210 is formed, at least the surface friction is reduced, so that the puncture-resistant skirt 210 is hardly broken. As an auxiliary surface treatment, ion implantation may be performed.
[0031]
  Better durability of switch member 200 and air / humidityResistanceAnother method for improving permeability is to treat the web membrane with a surface treatment that conforms to a predetermined surface of the switch member 200. Specifically, it is desirable that at least the web film portion (skirt) is surface-treated, or if possible, the inside (lower surface) and / or the outside surface treatment of the rocker switch member 200 is performed. For example, surface treatment of the entire lower surface may be performed. Those that can be used for surface treatment include parylene, ceramics (silicon dioxide, titanium nitrogen, etc.), metal coatings (aluminum, gold, titanium, platinum, etc.), or other suitable coating materials, It is not limited to these.
[0032]
  As shown in FIGS. 9A and 9B, an elastomer resin used to form the elastic switch member 300 in order to increase the durability and resistance of the elastic switch member 300.InMicrosphere 310TheThere is an improved method of soaking. The microsphere 310 is composed of several types of materials, but in a typical embodiment, it is made of glass, carbon, silicon, aluminum oxide, alumina, or the like. The microsphere 310 may be solid or hollow. These microspheres 310 form a highly puncture resistant substrate and impede gas flow, thus reducing the permeability of the skirt 312 and / or the body portion 314 of the member 300. Since the diameter of the microsphere 310 is as small as about 15 microns to about 100 microns and is generally an annular type, the microsphere 310 does not greatly impair the web flexibility. However, the microsphere 310 can take various shapes. Alternatively, the elastomer may be impregnated with ultrafine fibers having a diameter of about 1 to 15 microns known as synthetic fibers such as quartz fibers, ceramic fibers, and polyvinylidene fluoride fibers. In order to reduce the water vapor and gas permeability, there is also a method of increasing the thickness of the elastic switch member other than the portion that needs to be functionally thinned. The elastic switch member having an increased thickness drastically reduces the vapor transmission rate. The microspheres 310 may be provided only in the skirt 312 or may be distributed throughout the switch member including the body 314 and the skirt 312.
[0033]
As described above, the thickness of the skirt (i.e., a flexible seal) may not be highly hermetic due to the permeation of air and moisture. In other words, the conventional shape has high permeability. Desirably, the skirt should have low permeability, but usually has some permeability. The amount of gas / moisture through the skirt and other parts of the member depends on the pressure differential across the member.
[0034]
The switch member 82 (FIG. 3) is designed to provide a substantial displacement volume in the outward / upward and inward / downward directions. The symmetrical displacement volume reduces the pressure differential through the member, so the gas / humidity flow through the member is also reduced. By reducing the flow through the member, as described above, after using the autoclave, it is no longer in the lowered position but not touched by the user like a conventional rocker, and can return to the normal position. . Another advantage of suppressing the flow is that it is more reliable because moisture does not easily enter the sealed chamber and adversely affect the components.
[0035]
According to the invention, this symmetrical displacement can be obtained by several means. One example is the use of a fold / roll roll 220 as in the switch member 200 of FIG. If a fold / rolling roll 220 is used for the skirt portion 210, the skirt portion 210 can be moved up and down. Another method is to allow sufficient slack in the member so that the member can expand outward and inward. Furthermore, if an elastic metal that extends easily like polyurethane is used for the rocker, the rocker can be extended outward. In these embodiments, the pressure differential across the member is controlled by proper movement of the rocker in both directions.
[0036]
In FIG. 10, which is described using another embodiment, an attempt is made to avoid the difficulty in the pressure difference between the two sides of the member. Here, however, the liquid enters the sealed internal cavity 100 with the pressure being equalized. Use vents to prevent this. The main purpose is to prevent liquids (water, salt water, cleaners, blood, etc.) from entering the sealed internal cavity 100 loaded with the switch mechanism 40 of FIG. Such liquid ingress corrodes the switch mechanism 40, jeopardizes its function, or leaves debris in the internal cavity 100, particularly if it leaks later, sterility is threatened and becomes unacceptable. The vent of the present invention prevents the liquid from entering the internal cavity 100 and prevents the liquid from flowing to the patient side by the vent even if it enters for some reason.
[0037]
Further, FIG. 10 illustrates an exemplary method for blocking liquid entry into the internal cavity 100 and venting gas. If the handpiece inner cavity 100 is difficult to seal due to the permeability of the material, water vapor will actively enter the inner cavity 100 (due to autoclave pressure), but heat and pressure after using the autoclave. Can no longer be used, and slowly exits through the elastic rocker switch member 82. The vent 150 is formed in the outer shell 91 of the switch end cap 90 and is covered with the microporous hydrophobic membrane 160. The microporous hydrophobic membrane 160 is made of a hydrophobic material such as some suitable polytetrafluoroethylene (PTFE) or polypropylene, but is not limited thereto. In this hydrophobic membrane 160, air freely enters and exits the handpiece 30 but prevents liquid from entering. In this way, air quickly enters the internal cavity 100 of the handpiece 30 but prevents liquid from entering. The hydrophobic membrane 160 serves to equalize the pressure of the internal cavity 100 of the handpiece 30 (FIG. 1) and the external air, and at the same time blocks the liquid. The microporous hydrophobic wall 160 also serves as a virus and bacteria barrier because it filters the air entering and exiting it.
[0038]
  In another embodiment, one or more vents are formed in the switch end cap 90 to allow gas to pass through, but liquids such as water are difficult to pass through because the vents 150 are small. In other words, the liquid cannot easily pass through the vent due to the interfacial tension. To enhance the prevention of this liquid from passing through the vents, a hydrophobic material can be treated around the pores or a hydrophobic mesh (ie, the hydrophobic of FIG. 10).sexThrough the membrane 160)MouthUsed for the whole. According to one embodiment, relatively long ventilationmouthBy installing (approximately 0.1 inches to approximately 1.0 inches long and approximately 0.01 inches in diameter), the liquid is less likely to enter the sealed inner cavity 100. The installation of one vent is a simultaneous passage of liquid from one side to the internal cavity 100 and gas such as air from the other to the outside in a messy path following the sealed inner cavity 100. Since it is difficult for the liquid to flow, the liquid does not flow easily.
[0039]
  Or ventilationmouth150 is vented when the switch end cap 90 is fully assembled.mouthIn some cases, all of 150 may not be accessible. Therefore, the remaining liquid is vented to the user / patient.mouthThere is no fear of running out of 150. Instead, it is released harmless elsewhere in the assembled handpiece.
[0040]
  FIG. 11 schematically shows a highly durable switch assembly indicated at 400. The switch assembly 400 is covered by a relatively thick outer shell 402 that is not easily destroyed and does not flow gas, and can be easily pushed with light pressure. For example, according to one embodiment, the thickness of the outer shell 402 is approximately 0.04 inches to approximately 0.06 inches. The outer shell 402 is a shell that is pressed with a dome-shaped finger like a foam, and is made of various materials such as polyimide and polyester, but is not limited thereto. The outer shell 402 has two active areas, a first active area 404 and a second active area 406. Since the outer shell 402 has a dome shape, it can be easily deformed by the pressure of a finger that operates the switch mechanism 410. In the first active region 404, a first column 408 extends from the outer shell 402 in the direction of the switch mechanism 410. The end 407 of the first column 408 is completely connected to the outer shell 402, and the opposite end 409 is disposed in the stable position shown in FIG. 11 and as close as possible to the switch mechanism 410. The second end 409 includes a first switch pad 414 made on the PCB 420 that forms part of the switch mechanism 410 andPerson in chargeThere is a mating first contact pad 412. The first switch pad 414 is preferably disposed in a straight line with the first contact pad 412 in the axial direction. This is because pressing the first region 404 causes the first contact pad 412 to contact the first switch pad 414 and actuate the switch mechanism 410.
[0041]
  Similarly, a second post 416 extends from the outer shell 402 toward the switch mechanism 410 in the second section 406. As shown in FIG. 9A, in a stable state, it is desirable that the end 417 of the second column 416 is completely connected to the outer shell 402 and the opposite end 419 is infinitely close to the switch mechanism 410. The second end 419 includes a second switch pad 424 formed on the PCB 420 forming the switch mechanism 410 andPerson in chargeThere is a mating second contact pad 422. The second switch pad 414 is arranged in a straight line in the axial direction since the contact mechanism 422 comes into contact with the second switch pad 424 and the switch mechanism 410 is activated when the second region 406 is pressed. Is preferred.
[0042]
Optionally, the center post 430 can reduce inadvertent manipulation such as grabbing or pushing the center of the outer shell 402. The central column 430 extends from the outer shell 402 to the switch mechanism 410. In the stable position of FIG. 11, the center post 430 is stabilized with respect to the switch mechanism 410 or is brought close to the non-actuated portion. In addition, each of the first region 404 and the second region 406 includes a dedicated flexible coating (not shown) to further reduce the push down pressure. The exemplary outer shell 402 includes a staircase region 440 in each of the first region 404 and the second region 406. The staircase region 440 includes a contact point with a finger pressed by the user, whereby each of the first column 408 and the second column 416 is lowered toward the switch mechanism 410. The middle of this region 440 is preferably located directly above the first column 408 and the second column 416.
[0043]
Referring to FIGS. 12-15, an exemplary second switch end cap is generally indicated at 500. This switch end cap 500 has a different structure from the rocker type switch shown in FIG. The switch end cap 500 includes a pair of bellows type switch assemblies 510 and is connected to the outer shell 520 of the switch end cap 500. The outer shell 520 typically houses an electrical switch component 530, such as a circuit board 532, that provides a switch signal when activated by a user. Each circuit board 532 has two depressible contact pads 534 that provide a signal when one of these contact pads 534 is depressed to close the circuit.
[0044]
Each switch assembly 510 includes a switch abutment 512, a pair of bellows 514 and an upper gasket 516. Unlike the integrated rocker type switch member 81 of FIG. 2, this switch assembly 510 utilizes two separate bellows 514 that function as push-down switch buttons for generating signals. By physically separating these bellows 514, the risk of the user pressing both switch buttons can be largely avoided. To accommodate the switch assembly 510, the outer shell 520 defines a pair of spaced openings 522 therein. The opening 522 is generally annular. The opening 522 should also be sized to receive the bellows 514, at least a portion of the bellows 514 extending therethrough.
[0045]
Each switch abutment 512 is disposed so as to cover each circuit board 532. Therefore, the size and shape of the switch abutment 512 are preferably complementary to the circuit board 532. In the exemplary embodiment, the individual switch abutment 512 and circuit board 532 are generally rectangular in shape. The switch abutment 512 includes a first surface 540 and a second surface 542 facing the first surface 540 and facing the circuit board 532. This first surface 540 forms a first platform 544 thereon. The first platform 544 has a flat surface portion, and further has a pair of ascending staircase portions 546 formed thereon. As shown in FIG. 12 and FIG. 13 as an optimal example, each of the staircase portions 546 includes a pair of concentrically stacked rings having various diameters. The large caliber ring is in the lowest position and the other small caliber ring is formed on the lower ring, thereby forming a protruding structure on the first platform 544.
[0046]
Each staircase portion 546 includes an opening 550. This opening 550 extends completely through the switch abutment 512. Steps 546 are separated from each other to form a gap therebetween. The steps 546 are usually arranged on the same axis and provided with a space so as to be disposed on the contact pads 534 of the circuit board 532. As a result, the openings 550 are arranged coaxially with the contact pads 534 when the abutment 512 is placed on the circuit board during assembly. As shown in FIG. 12 and FIG. 13 as an optimal example, the first surface 540 of the abutment 512 is arranged below the opening 522 formed in the outer shell 520 with a pair of stepped portions 546 arranged coaxially. Installed to face the upper gasket 516. A part of the outer ring of the stepped portion 546 may protrude slightly from the outer shell 520.
[0047]
  14 and 15 are diagrams that optimally represent the configuration of the exemplary bellows 514. FIG. 14 is a side view of the bellows 514, and FIG. 15 is a cross-sectional view of the bellows 514. The bellows 514 includes a user's finger or thumb andBellows 514 to and from bellows 514Pushed down or releasedContactThere is a fuselage 515 with an upper portion 560 that functions as a touch surface. The fuselage 515 also includes a lower portion 562 that faces and mates with each step 546. Between the upper part 560 and the lower part 562, the bellows body 515 has a large number of integral bent parts 566. In the exemplary embodiment, the bends 566 are annular and separated from each other. The diameter of the bent portion 566 is preferably approximately equal to the diameter of the upper portion 560 and the lower portion 562, but the body 515 is preferably smaller than the diameter of the bent portion 566. Thus, the curved portion 566 forms an accordion-like structure as a whole.
[0048]
When the pressure is applied to the upper portion 560, the bent portion 566 folds the accordion-like structure and gives the bellows 514 a spring-like characteristic. As soon as this pressure is removed from the upper portion 560, the compressed folded structure 566 expands, thereby returning the bellows 514 to its original state. In one exemplary embodiment, the bellows 514 is made from a folded metal material, but other materials can be used as long as the bellows 514 have the spring-like properties described above. For example, the bellows 514 may be formed of nickel coated with gold or beryllium copper. In one exemplary embodiment, the thickness of the metal bellows is approximately 0.0005 inches to approximately 0.002 inches.
[0049]
As best illustrated, as shown in FIG. 15, the bellows 514 includes a post 570 attached to the upper portion 560. Preferably, the column 570 is integrally formed with the upper portion 560. The body 515 of the bellows 514 includes a central chamber therein, and a curved portion 566 surrounds the central chamber and extends radially therefrom. This central chamber is open only at the second portion 562 and the column 570 is formed to extend through the central chamber and through the opening formed in the lower portion 562. In the first uncompressed portion, as shown in FIGS. 14 and 15, the lowermost tip 572 of the column 570 extends below the lower portion 562. The column 570 generally has an annular cross section of varying diameters at different portions along the length of the column 570. More particularly, the post 570 includes an annular flange 578 having a larger diameter than the surrounding portion of the post 570. The annular flange 578 thus defines the first shoulder 579 and the second shoulder 580 in the vicinity of the lowermost tip 572. The column 570 has a slight taper from the second shoulder 580 to the lowermost tip 572.
[0050]
Since the column 570 is connected to the upper portion 560 and is movable in the central room, the force applied to the upper portion 560 and the compressive force generated in the bent portion 566 are transmitted through the central chamber directly below the column 570. . This results in the length of the column 570 protruding below the lower portion 562 when the bellows 514 is in this compressed position. As best illustrated, the column 570 is received in an opening 550 formed through the switch abutment 512, as shown in FIGS. The opening 550 has a diameter that is slightly larger than the diameter of the annular flange 578. In this uncompressed position, when the switch end cap 500 is assembled, the lowermost tip 572 does not extend downward at all or only slightly from the second surface 542 of the abutment 512. Since the openings 550 of the switch support 512 are coaxially arranged with the contact pads 534, the pillars 570 are similarly arranged coaxially with the contact pads 534. The contact pads 534 of the circuit board 532 are preferably foldable domes so that this circuit is complete when one of the domes is folded. This foldable dome has a structure that can be restored independently, and once the force to fold the dome disappears, it will return to the initial non-folding position.
[0051]
  This bellows 514 and the staircase 546ResultThe bellows 514 are disposed on the stepped portion 546 of the abutment 512 using conventional techniques. In this way, the middle room of the body 515 has the bellows 514 easily arranged and the abutment 512.ResultA portion of the staircase portion 546 of the abutment 512 is received as combined. The upper gasket 516 is disposed over the bellows 514 and further secures the bellows 514 within the overall structure. The upper gasket 516 includes a pair of spaced openings 517 that receive the bellows 514 with a number of bellows 514 extending over the upper gasket 516 when assembled in the uncompressed position. Since the upper gasket 516 is disposed in the outer shell 520, the upper gasket 516 is accommodated facing the inner surface of the outer shell 520. The bend 566 of the bellows 514 preferably extends over the outer surface of the outer shell 520, but the opening 522 of the outer shell 520 has a diameter that accommodates the bellows 514 so that the bellows 514 is subjected to pressure. Then, it is pushed into the opening 550 in the direction of the circuit board 532.
[0052]
The compression of the bellows 514 is caused by the bellows 514 that are compressed against the stepped portion 546 of the abutment 512. This compression allows the lowermost tip 572 of the column 570 to be pushed toward the circuit board 532, that is, the bellows 514 is compressed to such an extent that the lowermost tip 572 contacts the contact pad 534. This collapses the contact pad 534 (dome) and generates a switch signal. Thus, in this embodiment, the switch assembly 510 is made of a bent metal member having spring-like characteristics such that when the force is applied to the bellows 514, the switch assembly 510 is compressed, and once the force is lost, the switch assembly 510 returns to the initial uncompressed position. It is formed. The upper gasket 516 is desirably provided with a barrier that prevents unnecessary substances from entering the outer shell 520.
[0053]
Since the bellows 514 is made of metal, the bellows 514 is puncture resistant to surgical handpieces and instruments normally used (eg, wire brushes) and objects used in normal cleaning processes (eg, sterilization steps). Yes. The bellows 514 also includes a permeation barrier that prevents permeation of water vapor or gas through the bellows 514. This bellows 514 thus provides all of the advantages that have been described so far with respect to the previous embodiment of the switch member having a transmission barrier.
[0054]
In the above embodiments, the shape including the bellows part 514 has been described. However, the pressure can be freely moved from the non-compressed position to the compressed position by the applied pressure, and when the force is lost, the self-restoration to the non-compressed position can be performed. It will be appreciated that other types of switch members can be used, if any. For example, instead of the bent portion 566, the switch member that can be pushed down and is crushed may be provided with a crushed wall structure (see FIG. 11) that is crushed by pressurization and returns to an uncompressed position when no pressure is applied. This may be a metal switch member having a dome structure similar to that shown in FIG. 11 or a collapsible structure different therefrom.
[0055]
FIG. 16 is a diagram showing still another embodiment similar to the embodiment shown in FIGS. In this example, bellows 514 does not include column 570 (FIG. 15). Instead, the bellows 514 includes a hollow inner chamber, and the portion of the bellows 514 that abuts against the contact portion 534 of the circuit board 532 is substantially the inner surface of the upper portion 560 of the bellows 514.
[0056]
The contact portion 534 is more preferably a collapsible contact (for example, a dome type structure), but the column 535 extends outward from the contact portion 534. The dimensions and volume of the pillar 535 are the same as those of the pillar 570 (FIG. 15). The design is acceptable. The column 535 thus extends through the opening 550 and at least partially extends into the interior chamber of the bellows 514. In the uncompressed position, the top 560 of the bellows 514 creates a gap slightly above the top of the column 535. When force is applied to the upper portion 560, the body 515 of the bellows 514 undergoes compression and the upper portion 560 contacts the column 535. Since this column 535 is attached to the collapsible structure of itself (dome contact 534), further force supply to the upper portion 560 causes the column 535 to move downward. This results in crushing and closing the circuit in this dome structure (contact portion 534). A switch signal is sent at this time. Once this force disappears or weakens, the upper portion 560 moves outward with the column 535 as the dome structure 534 extends.
[0057]
The present invention has been shown and described with reference to particularly preferred embodiments, and various changes in shape will be understood by those skilled in the art, and details will not depart from the spirit and scope of the invention. The present invention constitutes as much as possible.
[0058]
  Specific embodiments of the present invention are as follows.
(A) A pushable switch member used to seal the inside of the surgical handpiece,
A skirt spreading around the body and the body;
A switch member comprising at least the main body and a metal layer provided in at least one of the skirts.
  (1) The metal layer is provided only on the lower side of the skirt facing the inside of the handpiece.Embodiment (A)The switch member according to 1.
  (2) The main body is a rocker type switch formed of an elastomer material.Embodiment (A)The switch member according to 1.
  (3) The metal layer is provided below the main body and the skirt.Embodiment (A)The switch member according to 1.
  (4) The metal layer is provided at least between the main body and the skirt and between the upper surface and the lower surface thereof.Embodiment (A)The switch member according to 1.
  (5) The peripheral skirt is thinner than the main body, and the metal layer is provided at least below the skirt.Embodiment (A)The switch member according to 1.
[0059]
(B) A pushable switch member used for sealing the inside of the surgical handpiece, the switch member comprising:
A skirt spreading around the body and the body;
A switch member comprising at least the main body, the skirt, and a substrate provided inside the handpiece, wherein at least a part of the substrate is covered with a transmission barrier.
  (6) The substrate is integrally formed with at least one of the main body and the skirt.Embodiment (B)The switch member according to 1.
  (7) The substrate is separated from the main body and the lower side of the skirt.Embodiment (B)The switch member according to 1.
  (8) The permeation barrier is a metal layerEmbodiment (B)The switch member according to 1.
  (9) The switch member according to embodiment (8), wherein the metal layer is metal-coated with a thickness between about 5 microinches and about 0.005 inches.
  (10) The substrate is provided immediately adjacent to at least one of the main body and the skirt.Embodiment (B)The switch member according to 1.
[0060]
  (11) The permeation barrier contains a polymer layer and is structurally changed so that the permeability of the polymer layer is reduced.Embodiment (B)The switch member according to 1.
  (12) The permeation barrier contains a layer that is modified to include a three-dimensional cross-linked polymer, thereby reducing permeability.Embodiment (B)The switch member according to 1.
  (13) The permeable layer contains a petroleum-based layer applied to the lower surface of the main body.Embodiment (B)The switch member according to 1.
  (14) The switch member according to the embodiment (13), wherein the petroleum-based layer is formed of either an oil layer or a grease layer.
  (15) It further includes a laminated material provided to face the petroleum-based layer, and the petroleum-based layer is provided at least between one of the main body and the skirt and the laminated material, and the laminated material is The switch member according to embodiment (13), which prevents migration in a petroleum-based layer.
[0061]
  (16) The transmission barrier is a ceramic layer.Embodiment (B)The switch member according to 1.
(C) A pressable switch member used for sealing the inside of the surgical handpiece, the switch member comprising:
A skirt spreading around the body and the body;
A switch member comprising a permeation barrier provided in at least one of the main body and the skirt so as to reduce a permeability of a fluid passing therethrough.
  (17) The permeation barrier contains at least a large number of microspheres provided over the entire skirt.Embodiment (C)The switch member according to 1.
  (18) The permeation barrier contains a number of microspheres provided on the entire body and the skirt.Embodiment (C)The switch member according to 1.
  (19) The switch member according to the embodiment (18), wherein the microsphere is formed of any one of a hollow member and a solid member.
  (20) The permeation barrier contains a large number of fibers provided throughout the body.Embodiment (C)The switch member according to 1.
[0062]
  (21) The switch member according to the embodiment (20), wherein the fiber is formed of a material selected from the group consisting of quartz, ceramic, and carbon.
(D) A vent assembly used to equalize the pressure between the interior and exterior while sealing the interior of the surgical handpiece,
An air vent provided in an outer shell of the handpiece and communicating with the inside of the handpiece;
A vent assembly comprising a hydrophobic membrane that is provided above the vent and allows gas to flow in and out through the vent and prevents fluid from entering and exiting through the vent.
  (22) The hydrophobic membrane includes a hydrophobic microporous membrane formed of a material selected from the group consisting of polytetrafluoroethylene and polypropylene.Embodiment (D)The vent assembly described in 1.
  (23) The vent is formed at a position inaccessible for the user of the handpieceEmbodiment (D)The vent assembly described in 1.
(E) A method for reducing the fluid permeability of an elastic switch used in a switch assembly,
A method comprising the steps of surface-treating an elastic member for a sufficient period of time and reducing the fluid permeability of the elastic member by lowering the porosity of at least a part of the elastic member.
  (24) The surface treatment includes a step of reducing the porosity by placing the elastic member in a low temperature environment for a sufficient time.Embodiment (E)The method described in 1.
  (25) The surface treatment includes a step of ion-implanting the surface of the elastic member, thereby structurally changing the lower surface to lower the porosity.Embodiment (E)The method described in 1.
[0063]
  (26) The surface treatment includes a step of laser-sintering the surface of the elastic member, thereby structurally changing the lower surface.Embodiment (E)The method described in 1.
(F) A method of venting gas from a room inside a surgical handpiece and preventing liquid from entering the room inside the surgical handpiece,
Forming a vent in the outer shell of the handpiece to communicate with the interior chamber;
A hydrophobic membrane is disposed above the vent, and the hydrophobic membrane allows gas in and out of the internal room through the vent to allow liquid in and out of the internal chamber through the vent. A method comprising preventing.
  (27) The vent is formed at a position inaccessible to the user of the handpieceEmbodiment (F)The method described in 1.
  (28) The hydrophobic film is formed of a microporous film formed of a material selected from the group consisting of polytetrafluoroethylene and polypropylene.Embodiment (F)The method described in 1.
(G) a switch assembly for use in a surgical handpiece to seal the inside of the outer shell of the handpiece,
A body formed of metal and having a portion compressible between a first uncompressed position and a second compressed position by the supply of a first force, the portion of the body generating a restoring force and generating the first force A switch assembly comprising a compressible switch member that is released when the force is removed and the restoring force returns the body to a first uncompressed position.
  (29) The compressible switch member includes a bellows switch member, and the first bellows switch member includes a plurality of bent portions and a first end portion of the bellows and a second portion so that the bellows switch member compresses the bellows by the first force. In preparation for the end of 2, the compression of the bent portion generates the restoring forceEmbodiment (G)Switch assembly as described in
  (30) An abutment having a first surface and a second surface, wherein the first surface includes a platform having a protruding member formed thereon, and an opening passes through the protruding member and is supported. And further comprising: an abutment formed to extend over the entire platform; and a gasket provided above the abutment and having an opening for receiving the bellows, the bellows being disposed above the projecting member, The switch assembly according to embodiment (29), wherein the bellows, in combination with a protruding member, has a portion that contacts a contact portion that is a component of an electrical switch.
[0064]
  (31) The switch assembly according to the embodiment (30), wherein a portion in contact with the contact portion is a column integrally formed with the bellows and extends through an opening of the protruding member.
  (32) The switch assembly according to embodiment (30), wherein the contact portion of the electrical switch component is part of a collapsible dome structure formed as part of a printed circuit board.
  (33) The embodiment (30), wherein the abutment includes an abutment plate, the protrusion includes a pair of stacked concentric rings, and an opening that passes through the center of the previous ring is provided. Switch assembly.
  (34) In an embodiment (33) in which the diameter of the lowermost ring is substantially equal to the inner diameter of the individual chamber formed in the bellows, and the individual chamber receives the protruding member so that the bellows is arranged in combination with the abutment. The switch assembly described.
  (35) The bellows column extends through the private chamber and can freely move therein, and when a force is applied to the upper part of the bellows, the column is guided downward and below the lower end of the bellows. A switch assembly according to embodiment (34) extending.
[0065]
  (36) The bellows is a substantially annular body having a lower part and an upper part, and a bent part is formed in the middle. The upper part, the lower part, and the intermediate part have the same diameter, The switch assembly of any one of the preceding claims (29), wherein the fuselage diameter between the lower portion is smaller.
  (37) having a collapsible dome contact structure, the crushing of the dome closes a switch circuit of the circuit board, generates a first switch signal, and the abutment is provided above the circuit board; 30. The switch assembly of claim 30, further comprising a circuit board wherein the opening extending through the projecting member and the abutment is coaxially arranged on the collapsible dome.
(H) a switch member used for sealing the inside of the surgical handpiece,
A switch member comprising a main body and a skirt extending around the main body, wherein at least the skirt is formed of a material that does not allow liquid to pass therethrough.
  (38) The skirt is composed of a large number of curved portions.Embodiment (H)Switch assembly as described in
  (39) The skirt is formed of a polymer material that has been surface-treated so as to lower the porosity of the polymer layer.Embodiment (H)Switch assembly as described in
[0066]
【The invention's effect】
Therefore, according to this invention, it can prevent that the switch assembly provided in the internal switch formed in the surgical handpiece contacts gas and water vapor | steam.
[Brief description of the drawings]
FIG. 1 illustrates an ultrasonic surgical cutting and hemostasis system console and handpiece and footswitch according to an exemplary embodiment.
FIG. 2 is a cross-sectional view of a typical switch end cap.
3 is a top perspective view of a typical switch member used as the switch end cap of FIG. 2. FIG.
4 is a perspective view of the switch member of FIG. 3 as viewed from below.
FIG. 5A is a perspective view of a switch member according to an exemplary embodiment as viewed from below, and FIG. 5B is a partial cross-sectional view taken along line AA of FIG.
FIG. 6 is a cross-sectional view of a switch member according to another exemplary embodiment in which a substrate is provided between the switch member and the transmission barrier.
FIG. 7 is a top perspective view of a switch member according to another exemplary embodiment.
FIG. 8A is a perspective view of a switch member according to another exemplary embodiment viewed from below, and FIG. 8B is a side view of the switch member according to another embodiment.
9A is a perspective view of a switch member according to another exemplary embodiment as viewed from below, and FIG. 9B is a partial cross-sectional view taken along line AA of FIG. 9A.
FIG. 10 is a cross-sectional view of a part of a switch end cap provided with a vent hole.
FIG. 11 is a cross-sectional view of a durable switch assembly according to another embodiment.
FIG. 12 is an exploded view of a switch end cap according to another exemplary embodiment.
13 is a cross-sectional view of the assembled switch end cap of FIG. 12. FIG.
14 is an elevational view of a bellows switch used in the switch end cap of FIG. 12. FIG.
15 is a cross-sectional view taken along line 15-15 of FIG.
FIG. 16 is an exploded view of a switch end cap according to another exemplary embodiment.
[Explanation of symbols]
10 system
20 Housing
22 First cable
30 handpiece
40 switch mechanism
50 foot switch
60 Second cable
90 Switch end cap

Claims (11)

In a pushable switch member (82) used on the surgical handpiece (30) to seal within the surgical handpiece (30),
A body (83);
A skirt (85) spreading around the body (83), when the body (83) is pushed down easily and when the body (83) is released. A skirt (85) for returning the body (83) to an initial position;
A metal layer (110, 122) provided in at least one place of at least one of the main body (83) and the skirt (85), the metal layer (110 providing a permeation barrier for the water vapor and gas in the at least one place) 122)
A switch member (82) comprising: Switch member (82) according to claim 1,
The body (83) is a switch member (82) in the form of a rocker type switch made of an elastomer material. Switch member (82) according to claim 1 or 2,
The metal layer (110, 122) is provided only on the lower surface (112) of the skirt (85) facing the inside of the handpiece (30) when used in the handpiece (30). Member (82). Switch member (82) according to claim 1 or 2,
The metal layer (110, 122) is a switch member (82) provided on the lower surface (112) of both the main body (83) and the skirt (85). Switch member (82) according to claim 1 or 2,
The metal layer (110, 122) is a switch member (82) provided in an intermediate portion between the upper surface and the lower surface of at least one of the main body (83) and the skirt (85). The switch member (82) according to any one of 請 Motomeko 1-5,
The switch member (82), wherein the skirt (85) is thinner than the main body (83), and the metal layers (110, 122) are provided on at least the lower surface (112) of the skirt (85). . Switch member (82) according to claim 1,
The switch member (82), wherein the metal layer (110, 122) is metal coated with a thickness of between about 0.127 μm (5 microinches) and about 12.7 μm (0.0005 inches). In the switch member (82) according to any one of claims 1 to 6,
The metal layer (110, 122) is a switch member (82) provided integrally with at least one of the main body (83) and the skirt (85). In the switch member (82) according to any one of claims 1 to 8,
The metal layer (110, 122) is a switch member (82) provided apart from the main body (83) and the lower surface (112) of the skirt (85). In the switch member (82) according to any one of claims 1 to 8,
The metal layer (110, 122) is a switch member (82) provided directly adjacent to at least one of the main body (83) and the skirt (85). The switch member (82) according to any one of 請 Motomeko 1-10,
The switch member (82), wherein the skirt (210) has a bend (220).

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