Abstract: A weight measurement device comprises: an upper surface cover on which a measurement target is placed; a load cell to detect weight of the measurement target placed on the upper surface cover; a bridge to support the load cell; a receiving member to receive the weight of the measurement target placed on the upper surface cover; and a bottom surface cover provided on a lower surface side of the receiving member, and further comprises a sliding part provided between the lower surface of the receiving member and an upper surface of the bottom surface cover to enable the receiving member to move in a horizontal direction relative to the bottom cover. The bridge comprises a pivot which is a fulcrum to make it possible to change inclination of the bridge relative to the bottom surface cover and is in contact with an upper surface of the receiving member.

Abstract: A system to monitor weight of a reservoir or a structure comprises a load cell which comprises an electrical or optical transducer to provide a proportional signal of the deformation, a load cell base support for holding the load cell on the ground substantially about the axis of the support element of the reservoir, a load cell support adapter to attach the loadcell to the support member of the reservoir. The cell support adapter may comprise an opening or a shouldering anchor aiming at facilitating attachment to a temporary lifting device.

Abstract: Disclosed herein relates to a system, comprising: at least one load receiver mounted on a shopping cart or basket and configured to receive an item placed into the shopping cart or basket for a weighing operation; a plurality of sensors configured to detect a plurality of parameters relating to the weighing operation of the item including at least one of: a relative angle between a force sensing axis of the at least one load receiver and a direction of gravity, a motion of the shopping cart or basket, and an ambient temperature surrounding the shopping cart or basket and the at least one load receiver; and a processor configured to determine an actual weight of the item based on at least a portion of the plurality of parameters.

Abstract: The present invention provides an animal harness comprising a harness body and a scale. The scale is secured to the harness body by a securement means. The harness can be utilized by a user to provide a specific amount of assistance to an animal using the harness because the scale will provide the user with the exact amount the animal weighs and how much assistance the user is providing the animal.

Abstract: System for resupplying a consumable good based on sensors placed to measure the level or flow of a good, and using the data produced in predictive systems to determine the likelihood of running out of a good before resupply is likely to arrive, triggering an order which arrives before supply is exhausted.

Abstract: A mobile apparatus for carrying and weighing a load includes a mobile frame supported by a plurality of wheels. At least one container is supported on the mobile frame for carrying a load. A plurality of sensor assemblies are coupled between the frame and the container, the sensor assemblies resistive to a weight force exerted by the container towards the frame in a generally vertical sensing direction for sensing a weight of the load, and the sensor assemblies non-resistive to error forces exerted generally orthogonally to the sensing direction for filtering out the error forces from the sensed weight. A stabilizing assembly is coupled between the container and the frame, the stabilizing assembly freely accommodating transfer of the force exerted by the container towards the frame in the sensing direction, and simultaneously inhibiting shifting of the container relative to the frame in one or more shifting directions perpendicular to the sensing direction.

Abstract: A separated solids monitoring system comprising a pressurised solids accumulator for receiving separated process solids, a weighing platform located inside the accumulator and arranged to carry process solids as they settle in the accumulator, a force transducer located inside the pressurised accumulator and mechanically coupled to the weighing platform to provide a weight signal which is a measure of gravitational force on the weighing platform, and mechanically based pressure compensation means integrated within the force transducer, and arranged substantially to compensate and remove a force offset in the weight signal due to the pressure of fluids in the solids accumulator thereby allowing a fuller measurement range of the force transducer to be used and substantially dedicated to indicating a mass of solids on the weighing platform.

Abstract: An apparatus includes a platform or other accessory that is supported by one or more piezoelectric transducers. As items are placed on or removed from the accessory, the piezoelectric transducer generates an electric charge that is representative of a change in weight. An amplifier receives the charge and provides output voltage that can be sampled to determine a weight value. In one implementation the platform may be supported by a transducer assembly comprising a frame and a pair of piezoelectric transducers on opposite sides of the frame. Signals from the pair may be used to compensate for environmental effects on the assembly, such as changes in temperature. The piezoelectric transducers and associated circuitry are extremely energy efficient, consuming little electrical power during operation.

Abstract: The present disclosure relates to a weighing assembly (100) for a luggage case (101). The weighing assembly (100) includes at least one support (107) in contact with a surface that supports a portion of a weight of the luggage case (101). A floating element (108) is coupled to the support (107). A deflection member (110) is coupled to the floating element (108), and the portion of the weight of the luggage case (101) causes an elastic deflection of the deflection member (110). A load cell member (112) disposed adjacent to and separate from the deflection member (110). The load cell member (112) is separate from the deflection member (110) the elastic deflection of the deflection member (110) causes a deflection of the load cell member (112), the load cell member (112) senses the amount of deflection, which correlates to the portion of the weight of the luggage (101).

Abstract: A liquid encapsulation device for embedding sensor is provided. The liquid encapsulation device comprises a substrate having an upper surface with a central concave portion; at least one protection layer sealed on the upper surface of the substrate; and at least one sensor fixed on the protection layer. Wherein, the central concave portion is filled with liquid and the sensor is arranged above the central concave portion.

Abstract: An assembly including a load cell body having contiguous cutout windows, each formed by a pair of cutout lines and connected by a cutout base, the second window being transversely bounded by the first window, the third window being transversely bounded by the second window; measuring beams, disposed along edges of the body, each defined by a respective line of the first pair of cutout lines; first and second arrangements, each having a pair of flexure beams connected by first and second bases, respectively; a loading element, extending from the second base; and strain gages, attached to the beams.

Abstract: A machine foot with a built-in load cell is provided, the load cell being suspended in an overlying sheath, with the feature that the screws which hold the load cell in place in the lower part of the machine foot pass through a bottom plate and are screwed up into a fastening ring that is separate from the sheath material. A method of production of a machine foot is provided, by which a rubber resin is moulded down into the sheath of the machine foot and is vulcanized thereto, the fastening ring being embedded in the rubber resin in an area that abuts the lower side of the sheath.

Abstract: Systems and methods for scale assemblies for providing nutritional content in accordance with embodiments of the invention are disclosed. In one embodiment, a scale assembly for providing nutritional content, the scale assembly in connection with a client device, the scale assembly comprising: a platform for receiving a food item; a pole connected to a center portion of the platform, wherein the pole applies a pressure to a surface of the client device based on a weight of the food item; a centerpiece having a hole for receiving the pole such that the pole moves vertically through the hole; at least one support leg, wherein the at least one support leg is connected to the centerpiece and provides support to the scale assembly; and wherein the pressure applied by the pole to the surface of the client device is used to calculate the nutritional content of the food item.

Abstract: A compact, self-contained, portable, electronic weigh scale for use for commercial vehicle weight enforcement. The scale has a base, a set of load cells, and a platform. The base is rigid, metallic, and generally rectangular, and has a central recessed area. The load cells are elongated, rectangular, and are coupled to the base in the central recessed area. The load cells are arranged parallel to each other. Each load celli has a long axis and a short axis, each load cell being fixedly coupled to the base at two side-by-side lateral points at a first longitudinal position relative to a bottom side of the load ceil and fixedly coupled to the base at two side-by-side lateral points at at least one other longitudinal position relative to the bottom side of the load ceil. The platform is rigid, metallic, rectangular.

Abstract: A weighing scale is disclosed. The scale includes a base, a load cell assembly coupled to the base, and a platform coupled to the load cell assembly. Also disclosed are alternative embodiments of the load cell assembly and methods of making and using the scale.

Abstract: The invention relates to a load cell for a scale having a monolithically configured measurement body that has a force reception section, a force introduction section, and a joint section arranged between the force reception section and the force introduction section, wherein the measurement body has a longitudinal axis and an axial end at the force reception side and an axial end at the force introduction side; having at least one strain gauge arranged at the upper side on the joint section for detecting a stretching deformation of the measurement body; and having a circuit board that is electrically connected to the at least one strain gauge, that is arranged at the force reception side, and that has electronics arranged thereon for processing at least one output signal of the at least one strain gauge.

Abstract: The present invention relates to a terminal for checking a calibration history of a scale, a system for managing a calibration history of a scale and a method of checking a calibration history of a scale, and more particularly, a terminal for managing history of calibrating or revising the reference data being a standard when calculating a weight, the system thereof and the method thereof. According to the present invention, it is expected to prevent business transactions of a scale user because a general user as well as a qualified person can determine whether a scale is manipulated without authority. In addition, according to the system of the present invention, it is possible to greatly lower the calibration cost of a scale.

Abstract: The invention relates to a load cell symmetrical about a central vertical axis and comprising first and second mounting surfaces, each on the same horizontal plane and configured for attachment to a support structure and to a loading fixture respectively.

Abstract: In the pressure sensor, at least two resistors are simultaneously molded at the first mounting surface and the second mounting surface of the substrate component ensuring uniformity and consistency of resistance of all resistors, at least one of resistors is a strain sensing resistor, and the resistors are electrically connected to form a pressure measuring circuit. Connecting the pressure sensor to the desired panel to accurately detect the curved deformation amount of the panel. The resistors in a pressure measuring circuit are adjacently distributed, and the resistance value of the resistor changes with temperature at the same time, so that the influence of the temperature change on the pressure measuring circuit is very small, and the interference against the external environment is good.

Abstract: A polymeric measuring plate of a weighing platform comprising measurement systems is characterized in that the measuring plate is made in its entire volume of a polymeric thermoplastic material or polymeric duroplastic material, thermosetting or chemically curing, the shape of the plate is limited by a substantially flat active surface (1a) and a spatially shaped passive surface (1b), and the measuring systems are located in areas of highest stress and are in the form of optoelectronic measuring systems (7) or beam measuring systems (11).

Abstract: A force sensor includes a substrate, a plurality of sensing elements, and a plate. The substrate includes a central aperture extending along a longitudinal axis of the substrate, and has a proximal surface, a distal surface, a first side surface, a second side surface, a top surface, and a bottom surface. A recess is defined in at least one of the distal surface, the first side surface, the second side surface, the top surface, or the bottom surface of the substrate. The plurality of sensing elements are disposed within the recess, and the plate is disposed over the recess and mounted to the substrate to hermetically seal the plurality of sensing elements within the substrate.

Abstract: A detecting device includes: a bridge circuit having at least one sensing resistor whose resistance varies according to a physical quantity of a measurement object; a power supply configured to apply a voltage to the bridge circuit; an instrumentation amplifier configured to receive an output voltage of the bridge circuit from high-impedance input terminals, amplify the received output voltage, and output the amplified output voltage; and a physical quantity calculating unit configured to receive the output voltage amplified by the instrumentation amplifier and calculate the physical quantity based on the output voltage. The bridge circuit is connected to the instrumentation amplifier via a connector.

Abstract: A weight estimation system for estimating weight of an aerospace vehicle while grounded, the weight estimation system comprising a measurement subsystem including at least one sensor configured to measure a physical property in an interface that interfaces at least one of a fuselage and a wing with an undercarriage of said aerospace vehicle, in at least one area exhibiting a measurable change in geometry that is at least partly due to said weight, said measurement subsystem configured to produce measured data indicative of said weight of said aerospace vehicle; and a processor for receiving at least part of said measured data, said processor configured to estimate said weight, by relating said measured data with predetermined physical-property-to-weight correspondence data associated with said aerospace vehicle.

Abstract: A framework for installation of coupling components, comprising: at least one mounting rail arranged on at least one of positions above and below the framework and used for installation of coupling components, wherein the mounting rail extends along a length direction of the framework; a locking device arranged at an end portion of the framework; and one or more mounting holes distributed in a side surface of the framework and used for installation of coupling components; wherein the framework is designed as a rectangular frame structure, an inner frame of the framework is provided with a cavity passing through along the length direction thereof, and the mounting hole passes through the cavity.

Abstract: In some embodiments, a cooking pot assembly includes a lid with a venting assembly. The venting assembly may include three different selectable modes, including a first mode for whistling venting, a second mode for non-whistling venting, and a third mode for non-venting. In some embodiments, the venting assembly is recessed into the lid. Also, the venting assembly may include a base portion that is secured within a recess portion of the lid to resist rotation, while a rotor of the venting assembly is mated with the base portion, but able to rotate relative to the base portion for use in selecting a venting mode.

Abstract: In one general aspect, an apparatus comprises a material including a non-layered mixture of an polymeric foam with a plurality of voids; and a plurality of conductive fillers disposed in the polymeric foam. The apparatus may produce an electrical response to deformation and, thus, function as a strain gauge. The electrical response may be a decrease in electrical resistance. The electrical response may be an electric potential generated. The conductive fillers may include conductive nanoparticles and/or conductive stabilizers. In another general aspect, a method of measuring compression strain includes detecting, along a first axis, an electrical response generated in response to an impact to a uniform composite material that includes conductive fillers and voids disposed throughout an elastomeric polymer, and determining a deformation of the impact based on the electrical response. The impact may be along a second axis different from the first axis.

Abstract: Provided is an overload prevention mechanism including a load receiving part provided with a flange having at least three ribs on the upper surface of the flange; a pedestal located below the load receiving part; an elastic body which has one end in contact with the load receiving part and the other end in contact with the pedestal, and which biases the load receiving part and the pedestal in such a direction that the load receiving part and the pedestal are separated from each other; and a connection member having on the lower surface thereof recessed grooves which engage with the ribs. The three or more ribs are disposed so as to restrict inclination and rattling of the load receiving part due to a load applied to the load receiving part.

Abstract: The present disclosure includes devices and method for measuring tension in a test object. An example device includes a probe configured to exert a force upon a test object at a particular location, a sensor that detects the force that the probe exerts upon the test object, and a switch that signals the sensor indicating the test object has been displaced a particular distance and/or angle, such that the sensor measures the force at a time when the test object has been displaced the particular distance and/or angle.

Abstract: Force measurement systems and methods are disclosed for accurate real-time measurement of forces. The system is configured to measure force as a function of time. The system may comprise a handheld device capable of measuring a force externally applied to opposing surface regions thereof for the purpose of monitoring or directing isometric exercises for personal wellness. Additionally, the system may be configured to communicate force measurement data to a remote device or server.

Abstract: A stand-on physiological sensor (e.g. floormat) measures vital signs and various hemodynamic parameters, including blood pressure and ECG waveforms. The sensor is similar in configuration to a common bathroom scale and includes electrodes that take electrical measurements from a patient's feet to generate bioimpedance waveforms, which are analyzed digitally to extract various other parameters, as well as a cuff-type blood pressure system that takes physical blood pressure measurements at one of the patient's feet. Blood pressure can also be calculated/derived from the bioimpedance waveforms. Measured parameters are transmitted wirelessly to facilitate remote monitoring of the patient for heart failure, chronic heart failure, end-stage renal disease, cardiac arrhythmias, and other degenerative diseases.

Abstract: A robot device includes an arm, a force sensor, and an adjustment portion. The force sensor is provided at a front end portion of the arm and has a force detecting portion that detects an externally exerted force. The adjustment portion performs a zero point adjustment by setting a reference point of the force detected by the force sensor based on a detection result by the force sensor. The detection result is obtained when the force detecting portion of the force sensor is in a protected condition. The protected condition is a condition in which no load is applied on the force detecting portion of the force sensor. According to this robot device, a technology for accurately setting the reference point of the force detected by the force sensor can be provided.

Abstract: A thin weighing scale having a thickness of less than 25 mm, comprising a first rigid bottom plate, extending along a reference plane defined by a first direction and a second direction, a second rigid top plate, at least four load cells 4, interposed between the first and second rigid plates, a set of linkages comprising arms, some arms extend in the first direction and some other arms extend in the second direction, each arm having an elongated shape with a first end attached to the first rigid plate and a second end rigidly connected to the second rigid plate, whereby a movement is provided along a third direction, the set of linkages preventing relative movement between first and second rigid plates along the first and second direction.

Abstract: A torque tube sensor to measure torque on a torque tube or shaft includes: a sensor body including at least a first body section and a second body section; one or more strain gauges including a first strain gauge disposed in the first body section; at least one transmitter; and strain gauge circuitry connected to the first strain gauge and at least three other resistive elements in a Wheatstone bridge configuration including two arms, the transmitter being connected between the two arms. The sensor also includes at least one receiver configured to receive signals generated by the at least one transmitter; and an armature carried by the first body section that interacts with a permanent magnet stator, the armature being in electrical contact with the strain gauge circuitry and providing power to the strain gauge circuitry and the receiver. The sensor can be part of an assembly.

Abstract: An example device includes a first flexural element, a second flexural element, a first rigid component and a second rigid component. The rigid components have a fixed height that axially offsets the first flexural element from the second flexural element. The first rigid component is coupled to the first flexural element at one or more connection points on a first plane and coupled to the second flexural element at one or more connection points on a second plane. The second rigid component is coupled to the first flexural element at one or more other connection points on the first plane and coupled to the second flexural element at one or more other connection points on the second plane.

Abstract: The sensor unit of the material tester consists of a pressure-sensor unit that measures a vertical force applied to the test probe during movement of the test probe relative to the test specimen and a horizontal force sensor unit for measuring the horizontally directed friction force. The horizontal force sensor unit is made in the form of a flexible parallelogram consisting of two sensor-holding plates interconnected through flexible beams, wherein one end of the first beam is attached to the upper sensor-holding plate and the opposite end to the lower sensor-holding plate, while one end of the second beam is attached to the lower sensor-holding plate and the other to the upper one. The beams are installed with gaps relative to both plates. The quick-release test probe incorporates a soft-touch feature.

Abstract: The present disclosure provides an electromechanical actuator comprising an actuator drive unit housing, a relief formed in the actuator drive unit housing, a column defined by the relief positioned adjacent to a second relief, and a load cell comprising the column and a strain gauge coupled to the column.

Abstract: A detecting apparatus includes: a lifting mechanism section that is provided with a lifting portion for lifting honeycomb structures and a shelf plate; an actual load value measuring section that measures an actual load value; a total load value calculating section that adds up the plurality of measured actual load value; a total load value determining section that compares a standard total weight value of the honeycomb structures and the shelf plate to the total load value and determines whether to satisfy a total load value determining condition; an actual load value determining section that compares the actual load value to the specified load value and determines whether to satisfy an actual load value determining condition; and a shelf-plate crack determining section that determines that the shelf plate is cracked when the total load value determining condition or the actual load value determining condition is not satisfied.

Abstract: A supporting frame and a motion assistance apparatus including the same may be provided. In particular, the supporting frame including a first frame including a hinge connecting portion, a second frame configured to slidingly move with respect to the first frame, and an assistance force sensing portion on at least one of the first frame and the second frame may be provided.

Abstract: This surface potential sensor is provided with an electret electrode (28), which is configured of a metal film (26) and an electret film (27), said electret electrode being provided on an upper surface of a diaphragm (25) of a semiconductor substrate. Four piezoresistors (29a, 29b, 29c, 29d) are formed on the diaphragm (25), and a distortion quantity detecting unit (32) is configured by forming a bridge circuit using the piezoresistors. Since an electrostatic force that operates between an object and the electret electrode (28) changes corresponding to potential of the object, and the electret electrode (28) warps corresponding to the change, the potential of the object can be detected by measuring a distortion quantity of the electret electrode (28) by means of the distortion quantity detecting unit (32). Consequently, not only the potential of the object but also a polarity thereof can be detected with reduced size and high sensitivity.

Abstract: A system to measure the installation torque of a screw pile comprises machinery suitable to drive the screw pile into the ground, said machinery further comprising a rotary drive suspended by means of a universal joint-type coupler. A load pin, having at least one sensor, is mounted through the universal joint-type coupler as a pivot pin and is oriented within the universal joint-type coupler so that at least some of the installation torque is transmitted through said load pin and is measurable by said at least one sensor. Preferably, a differential bridge network is used to obtain a measurable signal from the plurality of sensors.

Abstract: A force transducer for measuring compression and/or tension forces includes a rod-shaped deformation body and at least four strain transducers applied on the deformation body and configured for measuring a longitudinal strain and a transverse strain of the deformation body. Front and rear elongate recesses are provided on the front and rear sides of the deformation body at an intersection point between a central longitudinal axis and a central transverse axis of the deformation body. Left and right upper indentations and left and right lower indentations are provided on the deformation body respectively at the four quadrants bounded by the axes. An angle between the central transverse axis and a shortest connecting line between the front elongate recess and the left upper indentation is at least 17° and at most 29°.

Abstract: A vehicle seat includes: a bracket; and a seat frame that is mounted on the bracket through coupling member. The bracket has main body, and upright wall extending upward from the main body and coupled to the main body. The coupling member is mounted at one end on the upright wall with fastening member. The main body is provided with interference avoiding portion that prevents interference with protruding portion of the fastening member protruding from the upright wall toward the main body.

Abstract: A weighing device (101) has a weighing unit (102), a control unit and at least one application unit (110). The application unit is positioned within a secondary unit (104) that also has a receiving unit. The control unit has a unit for transmitting data. The weighing unit comprises load receivers (106) and a power transmitting unit. The secondary unit is placed on the load receivers, leaving a gap between the top side of the weighing unit and the bottom side of the secondary unit. The weighing unit transmits a power signal from the power transmitting unit to the receiving unit of the secondary unit through the gap and a control signal is transmitted from the data transmitting unit to the receiving unit of the secondary unit through the gap. The secondary unit, and in turn the application unit, is powered and controlled in a contactless manner.

Abstract: A hybrid touch-screen display that integrates force-based touch-screen technology with any one from among a group of projective capacitive, surface capacitive, resistive, digital resistive, SAW, IR, APR, DST, optical and electromagnetic touch-screen technologies to provide an ability to compensate for non-perfect force transfer. An alternate implementation is also disclosed that employs a single force sensor for relative force measurement in a system in which force is traditionally not measured, here a water dispenser unit. This allows compensation for varying static loads, run-time calibration, and filtering of extraneous loads through firmware.

Abstract: A valve stem connector comprises a first half and a second half, each of which includes a top section adapted to receive a portion of an actuator and a bottom section adapted to receive a portion of a valve stem. A plurality of cut-away sections is disposed in each of the first and second halves, and a pair of shear web installation sites is disposed between the plurality of cut-away sections on each of the first and second halves. A force measurement device is disposed in each shear web installation site of the pair of shear web installation sites, the force measurement device for measuring the strain on the valve stem. Each shear web installation site has a shear strain measurable by the force measurement device, and the plurality of cut-away sections allows for a bending beam near each pocket to minimize deflection.

Abstract: A thin film transistor is provided. The thin film transistor includes an oxide semiconductor layer including a source region, a drain region, and a channel region wherein a portion of the source and drain regions has an oxygen concentration less than the channel region. Further provided is a thin film transistor that includes an oxide semiconductor layer including a source region, a drain region, and a channel region, wherein a portion of the source and drain regions includes a dopant selected from the group consisting of aluminum, boron, gallium, indium, titanium, silicon, germanium, tin, lead, and combinations thereof.

Abstract: A method and device for simultaneously measuring the mass and the height of a body, wherein the measurement of the body mass is carried out by measuring the deformation of at least one deformable element, during which a scale platform is lowered, and the height measurement is realized as an absolute distance measurement relative to the scale platform, so that the distance measurement is subject to an error equal to the amount by which the scale platform is lowered. The error-prone distance measurement is converted by a correction factor into a height measurement value the absolute value of which corresponds to the averaged lowering of the scale platform.

Abstract: A force transducer for measuring compression and/or tension forces includes a rod-shaped deformation body and at least four strain transducers applied on the deformation body and configured for measuring longitudinal and transverse strains thereof. Front and rear elongate recesses are provided on the front and rear sides of the deformation body in the area of an intersection between a central longitudinal axis and a central transverse axis of the deformation body. Left and right upper indentations and left and right lower indentations are provided on the deformation body respectively at the four quadrants bounded by the axes. A ratio of a cross-section on a center plane extending orthogonally to the central longitudinal axis and including the central transverse axis, to a sum of first and second partial regions of the cross-section, is from 1.56 to 2.15.

Abstract: The calibration method for a multi-component force detector is a calibration method for a multi-component force detector provided in a rolling resistance testing machine comprising a spindle to which a tire is mounted, and a traveling drum having a simulated traveling road surface against which the tire is pressed, wherein when processing for calculating force acting on the tire from the measurement value of the multi-component force detector using a crosstalk correction factor for correcting the influence of crosstalk occurring in the multi-component force detector is performed, a test is conducted using at least one or more reference tire the rolling resistance value of which is already known, and the crosstalk correction factor is calibrated using “rolling test data” composed of force measured by the multi-component force detector during the test using the reference tire, and the rolling resistance value of the reference tire used for the measurement.

Abstract: A load cell includes a flexure element having a Roberval mechanism in which the respective ends of a pair of top and bottom parallel beams including a thin section are integrated in a fixed portion and in a movable portion, and a stopper for preventing an overload disposed between the pair of the top and bottom parallel beams by being fixed to the fixed portion. The front portion of the stopper is disposed in a concave portion for engaging the stopper formed on the inner side surface of the movable portion and extending in the width direction, and the front portion of the stopper of which a width is larger than the movable portion projects outwardly in the width direction of the movable portion.