Abstract: A heat insulation bottle includes a bottle body having an accommodation chamber opened to a top side thereof with a concave arc portion defined in an inner bottom side, a bottle head detachably connected to the bottle body and including a bottle mouth located at a top side with an opening defined therein in communication with the accommodation chamber, a guide surface located at an opposing bottom side thereof and sloping upwards from the bottom side of the bottle head to a bottom side of the opening and an air vent in communication between the accommodation chamber and the outside, a flexible bushing mounted in the opening in the bottle mouth, and a bottle cover connected to the bottle head and adapted for blocking the opening in the bottle mouth. The heat insulation bottle is practical for serving hot drinks, cold drinks and drinks with fruit particles.

Abstract: The present invention relates to an improved structure of a straw, which includes: a straw body which is hollow cylinder made of plastic, a plurality of fork portions at one end of the straw body to define a plurality of gaps there between. Each fork portion includes a body portion and a top portion. The body portion has one end connected to the straw body, and another end connected to the top portion. The body portion is uniform width, and the top portion has an arc-shaped external end. The above structure solves the problem of the conventional straw that the conventional straw is likely to be blocked by solid in the beverage, and is unable to pick up the fruit pieces in the beverage.

Abstract: A hanging system is disclosed. The hanging system is especially adapted to couple with travel bags of various sizes for holding garments and accessories in place when traveling or commuting. A second embodiment includes a hangar accessory which allows the hanging system to be mounted from a standard hanging rod.

Abstract: A floor mat (1) at a standing workstation with a mat surface (4) is disclosed, which comprises a mat structure (2) made of an elastomer material and formed beneath the mat surface (4), in which irregularly distributed elements (3) are arranged, the consistency of which is harder than the consistency of the elastomer material of the mat structure (2).

Abstract: A tree stand comprising a supporting base, a positioning sphere, and a compression collar. The supporting base is comprised of an annular cavity surrounding upwardly facing hemispherical socket. The annular cavity comprises an outer side wall including an upper threaded portion. The positioning sphere includes an outer spherical surface and a cavity for receiving a trunk of the tree. The compression collar comprised an outer threaded wall engageable with the upper threaded portion of the supporting base, and a first flange contactable with an upper portion of the outer spherical surface of the positioning sphere. When the positioning sphere is disposed in the hemispherical socket, and the compression collar is maximally threadably engaged with the supporting base, the flange of the compression collar is contacted with the outer spherical surface of the positioning sphere and immobilizes the sphere in the socket, thereby securing the tree in a desired upright position.

Abstract: The arrangement for dispensing a curtain using an extendable tube with mating rods and cartridges provides an expedient and convenient method for mounting, changing and removing curtains. It consists primarily of an extendable tube housing a cartridge for dispensing a curtain that is pre-assembled with attached circular balls and a guide piece. The cartridge is attached to mating rods that can be adjusted as needed to attach or remove additional cartridges. The user pulls the guide piece in a downward direction to release the curtain from the release chamber of the extendable tube.

Abstract: A product include an item for hanging. The item has a top edge and a plurality of spaced holes formed therein proximate the top edge. The plurality of spaced holes are arranged in pairs, wherein between each pair of holes, therein is a slit formed through the item. The slit is defined by a linear center portion and first and second angled end portions at respective ends of the linear center portion. A hanger ring assembly is also provided and includes grommet backings that mate to grommet bases so as to capture the item therebetween and are arranged about the holes at the first and second angled end portions of the slit.

Abstract: A slicer device and a method of using a slicer device for slicing and removing a fleshy part of a watermelon surrounded by a rind. The device includes an elongated handle and a scraper head with a scraping portion having at least one scraping edge configured to follow the contour of the watermelon while scraping the fleshy interior of the watermelon.

Abstract: A peeler is formed with a tubular main body having a first open end, an opposing second open end, and a hollow interior extending from the first open end to the second open end. The tubular main body is formed from a first flexible material allowing the tubular main body to deform under pressure by a use. A pick is attached to the first open end and extends away from the second open end, the pick being formed from a second material, the second material being different from the first material and further being relatively more rigid than the first material.

Abstract: Popcorn machines having automatic sifting systems, and associated methods of operation are disclosed herein. In one embodiment, a popcorn machine includes a cabinet for receiving popcorn and unpopped corn kernels. The popcorn machine also includes an automatic sifting system having a sifting component positioned at least partially within the cabinet to receive the popcorn and the unpopped corn kernels. The sifting component can include a plurality of perforations, and an agitator can be positioned to move the sifting component to agitate the popcorn and unpopped corn kernels. The agitation of the popcorn and the unpopped corn kernels moves the unpopped corn kernels toward and through the perforations.

Abstract: The present invention relates to a cooking vessel having a detachable handle and, more particularly, to a cookset having a detachable handle, wherein the handle can be simply attached to and detached from the cookset, and the cookset is firmly fixed to the handle in a state where the handle is coupled thereto so that the cookset is firmly fixed to the handle even when the cookset is moved or flipped during cooking.

Abstract: A portable coffee maker assembly for brewing coffee or other hot beverages from a pod from a portable device includes a base housing that includes a brewing compartment and two opposing transporting covers which may be selectively secured together into a transporting configuration or separated into a brewing configuration. The brewing compartment is operative to draws water stored in a water compartment member positioned thereon into the brewing conduit and direct the water to a pod receptacle positioned thereon, passing through an integrated heating element along the way. In this regard, heated water may be introduced into a coffee pod positioned in the pod receptacle and then dispensed into a drinking receptacle.

Abstract: The coffee machine (1) comprises a controller, a boiler for heating a flow of infusion water, a movable infusion unit (3) that comprises an open infusion chamber (4) connected to a dispensing line (6) for dispensing the coffee infusion and an ejection piston (9) slidably supported in the infusion chamber (4), a supply line (5) for supplying said flow of infusion water to the infusion unit (3), a closing piston (8) that is engageable for closure of the infusion chamber (4), the controller being programmed to subject the infusion unit (3), prior to execution of the infusion process, to a first course of translational movement for closure of the infusion chamber (4) by the closing piston (8), and to subject the infusion chamber (4) and the ejection piston (9) or only the ejection piston (9), following execution of the infusion process, to a second course of translational movement in the same direction as the first course of translational movement, for compression of the load of spent coffee grounds (33) against

Abstract: A device for continuous heating of fluids, using steam, includes a first tubular circuit, having one inlet and one outlet, in which to fluid or mixture of liquids with gases to be heated is circulated, and a second tubular circuit in which the heating steam is circulated. The first tubular circuit comprises a section that is helically wound around a section of the axial length of a hollow first cylindrical body, closed at both ends. The device further comprises a hollow second hollow cylindrical body in which said first cylindrical body and said helically wound section are coaxially housed. The second cylindrical body is closed at both ends and has radial passageways communicating between the cavity of said first cylindrical body and the cavity of said second cylindrical body. The first cylindrical body, second cylindrical body and radial passageways forming part of said second tubular circuit.

Abstract: A container for cooking food includes a first substantially concave element, made from a first metal material, and a second element, made from a second metal material, preferably ferromagnetic, externally fixed with respect to an area of the first element corresponding to the bottom of the container, the container moreover includes a third element internally fixed with respect to the area, made from the second metal material, or from a third metal material in which the first element, in its unrefined state, includes a supplementary annular portion constituting a continuous solid part of the first element, positioned near to the perimeter of the second element, and foreseen for flowing and moving near to the perimeter of the third element under the action of a punch and of a matrix; also a method for making the container is presented.

Abstract: A cookware has a lid, a cooking vessel, and a hinge that connects both the lid and the cooking vessel together. The hinge is movable and permanently installed on the lid and the cooking vessel. Both the lid and the cooking vessel stay together during cooking and storage.

Abstract: The present invention relates to a heating device (10) for heating food (12) in a container (14), in particular milk in a baby bottle, comprising a chamber (16) configured to contain a fluid (18) and to receive the container (14), a heating unit (20) for heating the fluid (18) in the chamber (16), a temperature measuring element (22) for measuring a temperature of the fluid (18) over a time range, a calculation unit (24) for determining, for each time point of the time range being a first time point, a temperature difference of the fluid (18) between the first time point and a corresponding second time point of the time range different from the first time point, the calculation unit (24) being configured to compare the determined temperature difference to a predefined amount of temperature, and an estimation unit (26) for estimating an arrival time point, at which a pre-set temperature for the food (12) contained in the container (14) is reached, based on the comparison result of the calculation unit (24).

Abstract: A grill device includes a first grill module movably connected to a second grill module to be movable between a closed position, where the first and second grill modules define a grill space therebetween for accommodating a food to be grilled, and an opened position. The first grill module includes a first housing having a first grill plate that has a penetrating hole, a sensing mechanism having a probe assembly that is movably mounted on the first housing and that has a probe, and a control mechanism which is disposed to actuate movement of the probe assembly between a projecting position, where a tip end of the probe extends into the grill space through the penetrating hole, and a retreating position, where the tip end retreats into the penetrating hole.

Abstract: A cooking assembly includes a grill rack having a peripheral portion defined by a plurality of laterally extending wires bound by a peripheral frame. An inner retention portion is defined by a plurality of laterally extending wires generally co-planar with the plurality of laterally extending wires of the peripheral portion. The inner retention portion includes a retention border adapted to removably engage the drip tray. A drip tray is configured to removably engage the retention border, thereby securing the drip tray laterally. One of a searing pan and a cooking stone is configured to be received in the drip tray.

Abstract: The present invention is an apparatus comprising a disposable frying oil filter and a filter securing element, and a method of using the same. The disposable filter is adapted to cover the sides and base of a fryer basket and allow oil to pass though at a substantially similar rate to a filterless fryer basket, while trapping virtually all small particles released from a cookable item. The filter securing device is preferably a frame attached to the fryer basket, and is adapted to hold the disposable filter in place and allow for easy replacement when the disposable filter becomes saturated with small particles.

Abstract: A blending system is shown and described herein. The blending system may include a base including a motor, a blade selectively and operably engaged with the base, where the motor rotates the blade, a container having an open end and a lid configured to cover the open end. The blending system may also include an interlock system that may include a plurality of induction coils positioned on the base and the container and be in electrical communication with at least one lid sensor, wherein the power is translated through the induction coils to engage a switch device to complete a power circuit to allow a user to operate the motor of the blender.

Abstract: A paperboard packaging container for bulk solids includes a container body having a container wall extending from a container bottom edge to a container body opening and having an inner surface facing an inner compartment in the packaging container, and a lid for closing the container body opening. An upper reinforcing rim is applied at the container body opening and extends along the opening edge, defining a perimeter of a container access opening and is joined to the inner surface of the container wall by means of a weld seal which extends around the container body opening and has an upper edge including a first abutment surface arranged to abut against a second abutment surface on an inner lid surface with the lid in a closed position on the container access opening and form a tight seal between the rim and the lid with the lid in the closed position.

Abstract: A toothbrush holder apparatus can include a toothbrush and a handle. The toothbrush can include a distal end with bristles. The handle can include a gripping portion and a cavity configured to hold the toothbrush. The handle can include a secured configuration and an unsecured configuration. In the secured configuration, the toothbrush can be secured within the handle with a support feature. In the unsecured configuration, the toothbrush is removable from the handle. A stopper can be coupled to the handle. The stopper can be located at a distance from the distal end of the toothbrush. An adapter can extend from the stopper and include an opening to the cavity. The adapter can have a convex shape extending from the stopper. The toothbrush can be located within the opening, and a support feature configured to hold the toothbrush within the handle.

Abstract: A water control and monitoring system for a shower head comprising a water flow meter, and a water control valve and a valve adjustment rod couple to the control valve on one end and a grip retention handle on the other end. The water flow meter is coupled in-line with a pipe passing through a shower wall to a shower head. The water control valve is coupled with the pipe passing through the shower wall to the shower head. The valve control rod extends down from the control valve greater than a foot to the rubber grip retention handle and is adapted to control the position of the water control valve. The grip retention handle forms a cavity that allows a user to insert their hand and applies enough force to the hand that the user can adjust water pressure simply by twisting their wrist.

Abstract: A bath or shower storage system which offers customizable storage solutions for a bath or shower. The bath or shower storage system includes a bath or shower wall having a magnet-friendly zone formed by an integrated panel within the bath or shower wall, and one or more magnetic shelves which can be attached to the magnet-friendly zone. The magnetic shelves include an attachment member that includes one or more magnets, and a storage member to store bath products. The bath or shower storage system may include a variety of storage solutions such as shallow trays, shelves, washcloth holders, and hooks.

Abstract: A bath or shower storage system which offers customizable storage solutions for a bath or shower. The bath or shower storage system includes a bath or shower wall having one or more integrated rails formed on the bath or shower wall, and one or more locking storage accessories which can be attached to the integrated rails. The locking storage accessories include hinge clamp that clamps on the integrated rail when the locking storage accessories are placed in a locked position, and a storage portion to store bath products. The bath or shower storage system may include a variety of storage solutions such as shallow trays, shelves, washcloth holders, and hooks.

Abstract: A showering assistance device that enables a user to adjust the height of the showerhead through an accessible height adjustment mechanism is discussed. The showering assistance device also allows a user to adjust the circumferential or lateral position of the showerhead with respect to the seat upon which the user is sitting via an angle adjustment mechanism.

Abstract: A guide block for stabilizing an edge of a glass panel relative to a surface is disclosed. The guide block includes a block base having a body of variable size and shape configured for mounting on the surface. The block base defines at least one fastening screw receiving hole on top and on a side thereof. The guide block further includes a mounting member having a pin extending therefrom an inner side of the mounting member. The block base has a front and a rear such that the front is configured to receive the pin in a hole therethrough such that the block base and the mounting member stabilize the edge of the glass panel disposed therebetween and the rear is configured as a receiving channel for stabilizing an edge of a sliding glass door disposed therein.

Abstract: A soap grip for a bar of soap provides a flexible fabric gripping body that extends through a medial portion of a bar of soap so as to extend from a first end and a second end thereof, the gripping body provides finger holes extending outwardly from the ends of the bar of soap to allow for secure gripping of the bar of soap while bathing.

Abstract: A foot brush assembly that includes a planar base member and a removable loofa base pad that is attached to the base member and a elongate handle, wherein the base member and handle are attached in a manner that allows the base member to pivot with respect to the handle and therefore allow the base member to be oriented horizontally for use or vertically to facilitate drainage of liquids from the device. When in a horizontal position the user can use the handles to stabilize the base member and help the user maintain balance. In embodiments a liquid soap dispenser is provided that introduce soap onto the loofa surface. In further embodiments a brush is also included with the device.

Abstract: A dispensing apparatus for strips of coiled flexible material having at regular intervals tear lines to form the strips. The apparatus includes a casing receiving the coil, the casing having a circular opening for the passage and distribution of a strip of coiled flexible material under a tensile stress. The casing also includes at least one washer fixed on the casing concentrically with the distribution opening, wherein the internal diameter of the at least one washer is smaller than the diameter of the opening. The one or more washers are made of an elastomeric material capable of being deformed under the effect of the material distribution through the opening for achieving, concomitantly, a strip cut along a tear line. The one or more washers cooperate with an element manually operable and arranged to reduce the internal diameter of the one or more washers.

Abstract: An assembly is provided. The assembly is configured to be disposed within a wall having an outer surface and an aperture formed in the outer surface. The assembly includes a housing and a lateral support assembly. The housing includes a lateral wall and a medial wall. The lateral wall includes a lateral outer surface, a lateral inner surface, and a lateral aperture extending through the lateral outer surface and the lateral inner surface. The lateral support assembly includes a retainer, a support housing, a button, and a biasing member. The retainer is disposed within the lateral aperture. The support housing is coupled to the retainer. The button is at least partially disposed within the passage of the retainer and within the passage of the support housing. The biasing member is at least partially disposed within the passage of the retainer and within the passage of the support housing.

Abstract: Referring to FIG. 1. The invention relates to a housing for a soft pack dispensing container for wipes B, the latter featuring hermetically sealed edges 10, 11 and a rigid flip top A which has a frame fixed to the dispensing container B, a frame which surrounds an aperture 7 through which wipes are extracted. The fixed frame features at least two slide rails 3, 4 enabling the dispensing container A to attach to the supports within a housing so long as at least one of the slide rails 3, 4 is of a specific geometric cross section profile that corresponds to the geometric cross section profile of its corresponding support.

Abstract: A toilet seat has a toilet seat ring and two coaxial hinges which have two mutually spaced-apart bearing pins and hinge sleeves molded onto the toilet seat ring. The two hinge sleeves slide onto the journals from the same side.

Abstract: A toilet with a base portion containing a front facing user-accessible compartment is disclosed. A channel is provided within a base portion for connecting a floor sewer pipe to the raised base of the toilet. Multiple embodiments are disclosed in which the user-accessible front facing user-accessible compartment comprises a retractable foot spa, a retractable scale, a computer processor, and user health devices. User interfaces are disclosed for the operation of the front facing user-accessible compartment and other functions of the front facing user-accessible compartment. Latching and moving mechanisms are also disclosed and claimed herein.

Abstract: Disclosed herein is a cleaner with improved cleaning efficiency. A cleaner includes a main body having a dust collecting unit and a suction head including a head cover, a base plate having a suction port to suck in foreign substances on a surface to be cleaned and coupled to the head cover, and a brush rotatably provided between the head cover and the base plate, wherein the base plate includes a first inclined portion slantly extending from a front end of the suction port with respect to the surface to be cleaned, and a second inclined portion slantly extending from a rear end of the suction port with respect to the surface to be cleaned, and integrally formed with the first inclined portion.

Abstract: A vacuum cleaner is provided, which includes a main body; a dust collection unit arranged in the main body to collect dusts from air that flows into the main body along an intake passage; and a suction unit arranged at a downstream that is lower than a location of the dust collection unit on the intake passage to provide a suction force, wherein the suction unit includes a suction force generator, an exhaust passage configured to switch a discharge direction of the air that has passed through the suction force generator at least twice, and a plurality of sound-absorbing members arranged on the exhaust passage to pass the air therethrough.

Abstract: A surface cleaning head 100 for a surface cleaning apparatus includes a dirty air inlet 108, a dirty air outlet 112, and a dirty airflow path extending between the dirty air inlet 108 and the dirty air outlet 112. The surface cleaning head 100 also includes an automated valve assembly 116 operable to open and place the dirty airflow path in fluid communication with ambient pressure. The automated valve assembly 116 is adjustably opened based upon a suction level within the dirty airflow path.

Abstract: Disclosed is a cleaning robot for creating a 3Dimensional (3D) obstacle map including information about a height of an object existing on an area to be cleaned, and cleaning the area to be cleaned based on the 3D obstacle map, and a method of controlling the cleaning robot. In accordance with an aspect of the present disclosure, there is provided. The cleaning robot includes a main body, a moving portion configured to move the main body, an obstacle sensor configured to sense a height of an obstacle, and a controller configured to create an obstacle map including information about the height of the obstacle.

Abstract: The invention relates to a vacuum cleaner robot comprising a suction device mounted on wheels and a power supply device mounted on wheels, where the suction device comprises a floor nozzle, a dust separator and a motorized fan unit for suctioning an air stream in through the floor nozzle, where the suction device comprises a drive device for driving at least one of the wheels of the suction device, and where the power supply device comprises a drive device for driving at least one of the wheels of the power supply device, where said power supply device is via a power supply cable connected to said suction device for supplying said suction device with power.

Abstract: A cleaning system comprises a power plant, a regenerative blower having a power input shaft, a suction port, and a discharge port, an interface assembly configured for transmitting power from the power plant to the regenerative blower, a pump configured for generating pressurized water, and a heat exchanger system configured for heating the pressurized water.

Abstract: Some embodiments provide apparatuses and methods useful to providing control over movement of motorized transport units. In some embodiments, an apparatus providing control over movement of motorized transport units at a shopping facility comprises: a central computer system comprising: a transceiver; a control circuit; a memory coupled to the control circuit and storing computer instructions that when executed by the control circuit cause the control circuit to perform the steps of: obtain, from one or more of the communications received from the motorized transport unit, route condition information comprising information corresponding to an intended route of travel; obtain additional route condition information detected by one or more detectors external to the motorized transport unit; detect an object affecting the intended route of travel; identify an action to be taken by the motorized transport unit with respect to the detected object; and communicate one or more instructions.

Abstract: The present invention relates in general to the field of cleaning devices, and more specifically, to a cleaning device and method of cleaning bathrooms. The cleaning device and method of cleaning bathrooms is inexpensive and environmentally friendly in that it utilizes a removable, washable and reusable cleaning head to thereby reduce unnecessary waste and cost. The cleaning device and method of cleaning bathrooms is sturdy and allows a user to clean an entire bathroom including showers, bathtubs, sinks, counters and toilets. The purpose of the invention is to provide a cleaning device and method of cleaning bathrooms that reduces the risk of slipping, falling and injuries associated with traditional methods of cleaning bathrooms (e.g., neck, back, shoulder and knee pain).

Abstract: The present invention relates to a wiping cloth which is configured so as to be multi-layered and has at least two material layers lying directly on top of one another, of which one first outer material layer forms an external wiping and cleaning layer, and of which the second material layer is configured as a storage layer. In order for such a wiping cloth which by way of a fixedly established surface facilitates a consistent application of cleaning liquid to be achieved, it is provided according to the invention that the at least two material layers lying on top of one another are made from a textile material preferably of at least approximately identical absorbency or water-release capability, in that the wiping and cleaning layer and the storage layer are mechanically interconnected in a planer manner, and in that a cleaning agent that is reactivatable by adding water is provided in at least one of the material layers lying on top of one another.

Abstract: A batch-type warewash machine includes a chamber for receiving wares to be cleaned, the chamber having a chamber access opening and a single spray zone, with at least one spray system for spraying liquid onto wares in the single spray zone. A door is movable between a closed position covering the chamber access opening and an open position away from the chamber access opening to allow wares to be moved in and out of the chamber. A curtain structure is mounted on the machine, the curtain structure located behind the door when the door is in the closed position. The curtain structure remains in position and at least partially covers the chamber access opening when the door is in the open position so as to retain hot moist air within the chamber when the door is moved to the open position upon completion of a ware cleaning cycle.

Abstract: A filter assembly for filtering a wash fluid to be circulated by a circulation pump in a dishwasher appliance includes a discharge blade defining lateral, transverse and vertical directions. The discharge blade includes a blade hub and a pair of opposing blades, and each of the opposing blades extend outward from the blade hub to a blade tip along the lateral direction. Further, each opposing blade may include a leading edge, a trailing edge, a top surface, and a bottom surface. The trailing edge of at least one opposing blade may be spaced apart from the leading edge along both the transverse and vertical directions, and may define a curve extending between the blade hub and blade tip along the lateral direction. Still further, the top surface of the at least one opposing blade may define a slope between the leading edge and the trailing edge along the transverse direction.

Abstract: An insertion apparatus includes an insertion section configured to be freely bendable, a rotational housing provided on an outer peripheral surface of the insertion section to be rotatable about a longitudinal axis, a motor that rotates the rotational housing, a drive control unit that supplies a drive current to the motor to control driving of the motor, a torque limit value storage unit that stores a torque limit value which is an upper limit of the drive current, a drive current detection unit that detects the drive current, and a torque limit value correction unit that corrects the torque limit value stored in the torque limit value storage unit in accordance with a bending shape detected by a bending shape detection unit that detects a bending shape of the insertion section.

Abstract: An intubation system includes an intubation instrument for capturing an image, wherein the intubation instrument has a first interface for providing an image signal representing the captured image, a display device with a second interface for receiving the image signal, wherein the display device is provided and designed to display the image captured by the intubation instrument, and a cable with a third interface at a first end of the cable and with a fourth interface at a second end of the cable. The first, second, third, and fourth interfaces are designed such that the first interface at the intubation instrument is connectable directly to the second interface at the display device and is alternatively connectable directly to the third interface at the cable, and such that the second interface at the display device is connectable directly to the first interface at the intubation instrument and is alternatively connectable directly to the fourth interface at the cable.

Abstract: An image signal acquisition unit acquires a first image signal corresponding to a first wavelength band, a second image signal corresponding to a second wavelength band, a third image signal corresponding to a third wavelength band, and a fourth image signal corresponding to a fourth wavelength band. A correlation storage unit stores a correlation between oxygen saturation degree and a first calculated value obtained from a specific calculation based on the second image signal, the third image signal, and the fourth image signal. A correlation correction unit calculates a correlation correction amount on the basis of the first image signal, the second image signal, the third image signal, and the fourth image signal, and corrects the correlation on the basis of the correction amount.

Abstract: An imaging unit including: a guide tube having an inner lateral surface extending in a longitudinal direction of the guide tube, the inner lateral surface defining an inner chamber; a lens tube having an outer lateral surface extending in a longitudinal direction of the lens tube, the lens tube being at least sectionally accommodated within the inner chamber of the guide tube; and at least one optical element which is accommodated in the lens tube; wherein the lens tube comprises a plurality of bars disposed on the outer lateral surface, each of the plurality of bars interacting with a corresponding one of a plurality of grooves recessed in the inner lateral surface of the guide tube.