Abstract: In a mobile terminal, a control section monitors a battery residual amount at a power supply section, if the battery residual amount is less than a preset threshold, it refers to the states of various flags stored in a flag table at a memory section. Subsequently, if the control section judges it is before exit after entry for a service for the object of a lock temporary release and an entry and exit usage service, it changes a noncontact IC card function section to a lock temporary release state. This allows the noncontact IC card function to be in a lock temporary release state, just before the power supply is turned off, even if the battery residual amount is low. Therefore, when the commuter gets off a train and passes through a station ticket gate, the commuter may use the noncontact IC card function.

Abstract: A method of reading indicia having encrypted data provided therein comprising the steps of: scanning indicia utilizing an indicia reader; recognizing the presence of encrypted data in the indicia; retrieving an appropriate encryption key for decrypting the encrypted data; decrypting the data utilizing the encryption key; and, decoding the decrypted data.

Abstract: A mirrored spinner with paired offset facets for scattering a laser beam. The mirrored spinner includes a first number of mirrored facets, including a second number of pairs of offset mirrored facets.

Abstract: There is provided a bar code reader arranging a diaphragm member in which a through hole for an emission diaphragm and a through hole for a field diaphragm are formed as one body on an optical path between a laser light source and a scanning unit, in such a way that the both holes extend over an emission optical path along which emitted laser light is emitted, and a return optical path along which return light reflected from a bar code returns.

Abstract: A portable terminal assembly comprises an enclosure having a distal end wall and a proximal end wall connected to a pair of sidewalls such that the enclosure walls connect a bottom surface to a top surface having a user interface to define an enclosure interior. The enclosure has a power source compartment positioned in the enclosure interior. The cover couples to the compartment situated in an opening in the bottom surface. The cover housing of the cover includes a cover surface, a pair of cover sidewalls, a proximal cover end wall and a distal cover end wall such that the cover walls extend from the cover surface to define the cover interior. A magnet is coupled to the cover interior, such that the magnet has a sufficient magnetic field strength for affecting the state of the contacts of a switch. The switch is mounted in the interior of the enclosure, such that the switch is coupled to at least one component receiving power from the power source when positioned in the compartment.

Abstract: Modular, portable data collection terminals are disclosed for use in mixed wireless and hard-wired RF communication networks, wherein various radio transmitter modules and associated antennas may be selectively added to a base terminal unit to solve networking problems associated with specific types of business environments. Modularity exists in both the hardware (splitting data collection and processing control circuitry from radio transceiver control circuitry) and software (splitting transceiver-specific, lower level communication protocol from generic, higher level communication protocol). The control circuitry, including associated microprocessors devices, interact to selectively activate communication circuits to perform necessary communication or data processing functions and enter and remain in a power-saving dormant state during other times. To support such dormant or “sleeping” states, a series of communication protocols provide for channel access to the communication network.

Abstract: A method for producing a secure personal card and its working process using an intelligent card, the card has electric contacts, a CPU with at least data memory of the user and a biometric data receptor of the user. The biometric data stored in the card is used to make a comparison with biometric data received at the moment of use. Once the card is activated, generating an absolute identification of the biometric data of the authorized user, said biometric data being stored in an unreadable memory, generating and storing the personal data of the user and his/her access code, said biometric data being compared with the current read data of the actual user, in order to verify the identity of the user, then verification and identification of said personal data and access code being allowed in order to continue regular working operation.

Abstract: A method of manufacturing a microelectronic device with contactless operation, mainly for electronic passports. An antenna is made on a thin, flexible substrate. A perforated sheet that is thin and calibrated, and that has at least one cavity in its thickness, is placed on the substrate. A microelectronic chip is placed in each cavity of the perforated sheet and the output contacts of the microelectronic chip are connected to corresponding terminals of the antenna. The microelectronic chip is protected by sealing off the cavity that contains the chip. The method is particularly adapted for manufacturing electronic radiofrequency identification devices, in particular for electronic passports.

Abstract: This disclosure discloses a tag label producing apparatus comprising: a printing device; a transmitting/receiving device that performs information transmission/reception; a feeding device that feeds said tag medium; a coordination control portion; a communication determining portion that determines whether or not information transmission/reception has succeeded; and a decision portion that decides a feeding-stop condition for stopping feeding based on a feeding condition for the transmission/reception, and a feeding-condition for printing to a print area; wherein: said coordination control portion controls in coordination operations of said feeding device, said transmitting/receiving device, and said printing device so as to stop feeding based on said feeding-stop condition decided by said decision portion and to perform retry of said information transmission/reception when said communication determining portion determines that said information transmission/reception has failed.

Abstract: A payment method and system are provided for electronic data that is purchased by a recipient from a supplier thereof for transmission to the recipient with payment being made in advance of downloading of the electronic data. The pre-payment entitles the recipient to a predetermined period of time online, or a predetermined quantity of downloaded electronic data. Payment control means associated with communication means communicates with a source of funding associated with the particular recipient and an allocated funds register is associated with the source of funding such that an initial quantum of value contained in the source of funding is credited to the allocated funds register. The payment control means monitors the balance remaining in the allocated funds register and when a predetermined low value is reached a further predetermined quantum of value contained in the source of funding is credited to the allocated funds register to increase the balance therein and enable continued connectivity.

Abstract: A method of imaging a coding pattern disposed on a surface of a substrate. The method comprises the steps of: (a) capturing an image of a portion of the coding pattern; (b) sampling a registration symbol contained in the imaged portion; (c) mapping a set of data elements to a first translation code symbol value when read in a first orientation or a second translation symbol code value when read in a second orientation; (d) determining a translation from the mapped set of data elements; and (e) using the translation to sample and decode tag data.

Abstract: An equipment interface module that can operate one or more pieces of HVAC equipment in accordance with instructions received from a properly operating thermostat, yet can also operate the HVAC equipment when communications between the thermostat and the HVAC controller are lost due to, for example, low battery power at the thermostat, malfunctioning thermostat sensor(s), malfunctioning communication and/or thermostat circuitry, electrical interference, and the like. In some instances, the equipment interface module may regulate the HVAC equipment in accordance with a signal from a remote sensor when communication with the thermostat is lost.

Abstract: A shape memory alloy (SMA) actuator for engaging and actuating a device. The actuator includes an engagement mechanism, a bias element, and a SMA object(s). The SMA actuator may automatically and passively transfer to a backup or redundant feature that resets or extends the actuator's operational life. In one embodiment, the SMA actuator includes an additional SMA object(s) that replaces the primary SMA object(s) in the event the primary SMA object(s) breaks. The SMA actuator may also be configured to apply a dynamic stress to the SMA object during transition of the object to modify the transition temperatures of the object. The SMA actuator may be part of a fluid distribution system, such as a heating, ventilation, and air conditioning (HVAC) system and used to control the flow of fluid, such as air, from the distribution system.

Abstract: A base plate for fastening a rail to a fixed bottom support, having a through-opening which runs from the upper side of the base plate to its underside and through which a clamping bolt having a polygonal head is inserted from the underside, forming in the underside, a receptacle, wherein the head of the clamping bolt is seated. Each side-face of the bolt head has a face for contact formed on the circumferential wall, which extends for part of the length of a side-face of the bolt head, and against which side-face has, planar support. The faces for contact on the circumferential wall are spaced apart from one another. There is formed in the circumferential wall of the receptacle, between each pair of adjacent faces for contact, a recess wherein there is no contact between the bolt head and the circumferential wall of the receptacle.

Abstract: The present disclosure relates to a system and method for non-invasively attaching components to railroad track rails. More specifically, an anchor is provided that securely fastens to the track rail in a non-invasive manner for holding one or more signal lines to a surface of the track rail. In one embodiment, the non-invasive anchor utilizes a compressive force to clamp to a flange portion of the track rail. In this regard, first and second body members of the anchor may be advanced toward the toward opposing surfaces of track rail to compress the component between a portion of the anchor and a surface of the track rail. In one embodiment, a pawl prevents the withdrawal of these body members from one another such that the compressive force may be maintained once the anchor is applied to the track rail.

Abstract: A system for fastening a rail on a substrate includes a base plate, molded into which is a central portion, the width of which is adapted to the width of the rail foot of the rail to be fastened, with at least one fastening element for connecting the base plate to the substrate. The at least one tensioning element is provided for holding down the rail on the base plate. The system provides a fastening system allowing fastening of rails that satisfies modern requirements with the additional benefit of low production costs and simple assembly, while maintaining the basic configuration of the base plate provided and using simple means.

Abstract: A system for the data management of a thermal spraying apparatus with a spray gun (2) is made available, wherein the system includes a decentrally arranged device (1) with a memory (4), in order to detect process parameters and to store data of the thermal spraying apparatus and wherein the data contain identification and operating data of the thermal spraying apparatus and the device (1) additionally includes a bus interface (6) for the transmitting of the data.

Abstract: A nebulization apparatus with a packaging and fixing structure includes a piezoelectric driving device, an adhesive agent, a nebulization plate, a packaging layer and a fixing base. A ditch at the piezoelectric driving device is provided for filling an adhesive agent and installing the nebulization plate that is fixed to the driving device by the adhesive agent. The packaging layer covers the piezoelectric driving device. The fixing base fixes the piezoelectric driving device. Preferably, the packaging layer is made of a polymer material for insulating moisture and preventing short circuits of the piezoelectric driving device. The ditch and the adhesive agent enhance the attaching strength of the piezoelectric driving device and the nebulization plate to extend the life of the nebulization apparatus, and the adhesive agent can electrically insulate the nebulization plate and the piezoelectric driving device, such that the nebulization plate will have no electrochemical action with the liquid.

Abstract: An aromatic nebulizing diffuser includes a base panel, an electric fan, a power control unit, a lower housing, a fluid container that has bottom mounting rods detachably plugged into respective tubular upright posts of the base panel to facilitate cleaning work, a water baffle, an upper housing, an ultrasonic oscillator that controls a light source to emit light when oscillating an aromatic fluid in the fluid container to produce a fine mist of aromatic fluid droplets and a speaker mounted in a vertical speaker holder at the bottom side of the fluid container within the lower housing and controllable by the power control unit for audio output.

Abstract: The present invention provides a bumping-type sprinkler. The sprinkler includes a main body, where an inlet pipe coupling end is mounted at the lower end, an upper frame is mounted at the upper end, and a water outlet is arranged at lower flange nearby the upper frame. A revolving member, arranged onto the upper frame of the main body, has a torsional spring and a revolving portion. An outflow turntable is assembled corresponding to the water outlet of the main body. A pivot portion is placed centrally on the outflow turntable for screwing it laterally on the water outlet at interval. A plurality of outflow guide holes are arranged at intervals along a circular path of the eccentric circumferential portion of the outflow turntable. The outflow guide holes can be located corresponding to the water outlet in line with the change of rotation/displacement angle of the outflow turntable.

Abstract: The present invention relates generally to a nebulizer, and more particularly but not exclusively to a compact nebulizer that may include an angled impactor and/or siphon tube integrated into the impactor to increase the nebulizer efficiency.

Abstract: The invention relates to a dispenser for a substance, comprising a housing (1), a reservoir (2), a metering valve (3), and an actuator (4). In known dispensers, the metering valve (3) is positively coupled to the actuator (4) via coupling means when the metering valve is activated for the first time. The invention is characterized in that the coupling means can be activated by inserting a the reservoir (2) into the housing (1) and by the respective relative movement between the housing (1) and the reservoir (2) in the direction of insertion (E) thereby eliminating an idle movement after the insertion of the reservoir.

Abstract: A feed nozzle assembly for introducing a mixture of a gas and a liquid hydrocarbon droplets into a vessel in the form of a substantially sheet-like spray, which feed nozzle assembly comprises a nozzle body provided at its upstream part with means to supply the gas and means to supply the liquid hydrocarbon to said nozzle body and at the downstream end with a closed outlet end which outlet end is provided with an elongated opening wherein in the opening an insert is positioned such that a continuous loop opening results for discharge of the mixture of gas and liquid droplets.

Abstract: A showerhead with a rotationally adjustable handle includes a handle unit, a water outlet head unit, and a water inlet control unit. The handle unit has a hollow structure therein and has a first, a second, and a third communicating pipe penetrating therethrough. The water outlet head unit has a cover cap and an outlet valve assembly. The cover cap is connected to a first end of the handle unit and provided with an accommodating space for accommodating the outlet valve assembly. The outlet valve assembly is connected to one ends of the first, the second, and the third communicating pipe. The water inlet control unit is connected to a second end of the handle unit and is rotated to control a water inlet state among a plurality of stages, such that a water flow is guided into any one or a combination of any two of the communicating pipes.

Abstract: A mechanism of controlling water outflow of shower is provided in the casing of shower. The water outlet of the mechanism is aligned with the water outlet of shower. The mechanism of controlling water outflow comprises inner sealing shell, outer sealing shell, and an intermediate cavity defined between the inner sealing shell and the outer sealing shell. A water outflow cavity is formed between outer sealing shell and water outflow disc. The intermediate cavity communicates with intake channel of shower. The mechanism of controlling water outlet also comprises separating sealing pad inside the intermediate cavity, with one side sticked to the water outflow disc of outer sealing shell and the other side sticked to valve elements. The intermediate cavity comprises the inner cavity and outer cavity. The inner cavity communicates with water outflow cavity through the first small hole and with outer cavity through a through-hole. The intake channel communicates with outer cavity.

Abstract: In accordance with certain embodiments, a system includes a spray device having a liquid pathway leading to a liquid exit, an air pathway leading to an air exit directed toward a spray region downstream of the liquid exit, and an assembly disposed in the liquid pathway adjacent the liquid exit. The assembly includes a threadless pintle generally fit into a sleeve in a concentric manner without threads. The assembly also includes a generally annular passage between the threadless pintle and the sleeve and a passage coupled with the generally annular passage. The generally annular passage also has a cross-sectional area that alternatingly increases and decreases in a lengthwise direction along the liquid pathway.

Abstract: Provided is a manual air-actuated spray paint apparatus and associated method for evenly disbursing paint in a controlled manner. Such an apparatus preferably includes a portable reservoir for holding the paint therein and a hand-actuated paint applicator removably coupled thereto. A mechanism for simultaneously discharging a single stream of paint and a volume of air may also be included. A discharge spout is removably mated to and in fluid communication with the paint applicator for mixing the single paint stream and the volume of air as they pass through the spout. A trigger is pivotally mated to the housing and is articulated between tensioned and released positions to activate the paint discharging mechanism. When the trigger is engaged, the paint is directed upwardly out of the reservoir and travels out the discharge spout to be applied to the surface intended to receive the paint.

Abstract: The invention relates to a fuel injector having a coupler. The reciprocating movement of an actuator is transmitted by the coupler to a pin-shaped injection valve member which is guided into the nozzle body. The coupler has a valve piston and a coupler sleeve, and the valve piston is displaced in the inner diameter area of the coupler sleeve. The inner diameter of the coupler sleeve is greater than the outer diameter of the injection valve member. The difference between the inner diameter of the coupler housing and the outer diameter of the injection valve member is 0.2 mm or less.

Abstract: In one embodiment of the present invention, a process for manufacturing at least one particulate material is disclosed, the process including the following consecutive steps of: a) introducing into a vibrating grinder at least two powders each comprising UO2, provided by two different synthesis routes and of close specific surface area; b) shaking the powders into the grinder so as to form a particulate material, the grinding intensity being sufficient to break up the agglomerates and the aggregates in the powders without at the same time breaking up the crystallites in the powders, and the grinding energy being such that all of the agglomerates and aggregates are destroyed. One embodiment of the present invention also concerns a particulate material obtained by this process.

Abstract: A sieve device including a cog elongation with several cogs shaped from flexible material arranged parallel to each other. The cogs are provided with bends or chamfers serving for defining a grid to define the grain size for the sieved material. The sieve device is included in a cylinder disintegrator.

Abstract: A powder based granules disintegrating and sizing device having a drive shaft in a horizontal direction inside a casing, a rotor fixed to the drive shaft, a sizing stator having an inclined surface, a gap section A where the powder based granules settles being formed by the plate surface of the rotor and the inclined surface of the sizing stator, and a disintegrating and sizing section B being formed by the narrowest gap section between the circumferential edge of the rotor and the sizing stator. The drive shaft is supported in a cantilever fashion, the rotor is fixed to an open side end portion thereof, the sizing stator is installed over the whole circumference of the rotor, a raw material supply port is opened in the vicinity of the central portion of the rotor, and a product output port is opened in the vicinity of position directly below the rotor.

Abstract: A mobile rock crushing vehicle with a detachable electronic control box which can be automatically lifted, by a pair of hydraulic pivoting arms, off the vehicle, lowered and set upon any vibration damping and isolating mass, such as the earth, all by moving a hydraulic lever. The pair of pivoting arms further automatically configure a reduced-vibration transmitting connection when the electronic control box is set upon the ground.

Abstract: A pulveriser mill has a grinding set (2) supported by a support table (4), the support table having on its underside supporting parts 8?, 10?, 12?. By such means the working life of the support table may be extended.

Abstract: A crushing and mill device includes an outer rotary disk (1) and an inner rotary disk (2) put in said outer rotary disk, wherein, the outer and inner rotary disks communicate the inlet (3) of the feed material, some through holes (20) communicating the outer and inner disk are provided on the sidewall of the inner disk, some carrier plates (4) for carrying the feed material are provided on the places that correspond to the through holes (20) on the disks. The rotations of the outer and inner disks are driven by motors, and the rotations direction of the inner and outer disks are opposite. The sidewall of outer disk has an outlet (10) of the feed material. The feed material enters the inner and outer disks from the inlet, and the feed material is shot off oppositely by the rotations of the outer and inner disk. The feed material passes the through holes of the inner disk and impacts with each other to be broken and milled.

Abstract: A belt retractor for a safety belt system includes a frame, a belt reel rotatably mounted in the frame, a force limiter, a locking mechanism which couples the belt reel in a restraint case to the frame via the force limiter, and a belt webbing unwinding measuring means which includes a signal transmitter and at least one sensor. The sensor is associated with the signal transmitter and detects a change in a magnetic field. At least upon activation of the locking mechanism the signal transmitter is coupled to the belt reel such that it generates a signal upon rotation of the belt reel.

Abstract: A method is described for obtaining a coreless roll (R) of web material with a first portion of web material forming an inner nucleus (R1) of said roll and a second portion of web material (R2) wound around the outside of said nucleus. The two portions (R1, R2) can be separated from one another and, for said purpose, an interface or discontinuity is created in at least one turn of the web material forming the roll, between said inner nucleus and said second portion of web material, so as to facilitate the extraction of the inner nucleus from the outer portion of the roll.

Abstract: A thread spool holding device has a plastic base plate that holds a series of preferably soft plastic spindles that can be introduced or removed from the base and can be arranged as needed by sliding along a slotted track of the base. Each spindle can hold a threaded spool and has a cross sectional configuration for gripping the center hole of the spool. The spindle ends can also hold a bobbin in tandem with a thread spool.

Abstract: An aircraft with a long body 1 which has a forward end 2 and an aft end 3, which is able to achieve vertical take-off by means of a tilt-able rotor and blade assembly 4 at the forward part of the aircraft and a tilt-able turbojet 19 at the rear of the aircraft. The rotor and blade assembly is rotated by an engine assembly 8, with the engine assembly, the rotor and blades all positioned on top a multi-directional tilt enabling joint 9. The turbojet is fitted to a multi-directional tilt enabling joint 27 to allow control of lateral movement of the aircraft as well as providing vertical lift and forward propulsion during forward flight. The turbojet is connected to the tilt enabling joint 27 by a rivet 30 such that the turbojet can be rotated relative to the tilt enabling joint.

Abstract: An arrangement (10) for installing a component (12) in an aircraft comprises a guide device (14) which is connectable to an aircraft structure or is formed integrally with the aircraft structure, as well as an elastically deformable damping element (16; 16a, 16b, 16c) which is adapted to enable the component (12) to be mounted in the guide device (14) in a self-supporting manner. A locking mechanism (26) is adapted to fasten the component (12) in a desired position in the guide device (14) in a releasable manner.

Abstract: A plate material is formed into a height difference adjusting member having a J-shape such that its shim portion and resilient support portion are opposed to each other. The height difference adjusting member is mounted on a spar such that the shim portion and the resilient support portion are resiliently mounted to a flange of the spar. A rear end of a leading edge skin is fixed to the flange by a fastener in a state where the shim portion of the height difference adjusting member is interposed between the leading edge skin and the flange. The shim portion adjusts a difference in height between a front end of a main body skin and the rear end of the leading edge skin. Even if a large number of height difference adjusting members are mounted on the spar, the height difference adjusting members do not fall off and are not displaced.

Abstract: A leading edge structure for use in an aerospace vehicle includes a body having a flowpath surface which defines a leading edge adapted to face an air flow during operation; and a metallic icephobic plating comprising nickel applied to at least a portion of the flowpath surface.

Abstract: An end effector operatively coupled to an extendable tensile element extended from a first vehicle engages a primary receptacle of a second vehicle. The first and second vehicles are drawn together by retracting the extendable tensile element into the first vehicle until contact therebetween, after which roll axes of the first and second vehicles become substantially aligned responsive to a further retraction of the extendable tensile element into the first vehicle and a resulting tension in the extendable tensile element. At least one alignment post of at least one of the first and second vehicles engages with at least one surface of at least one corresponding secondary receptacle so as to at least substantially align the first and second vehicles in roll responsive to the tension in the extendable tensile element.

Abstract: Aircraft control surface (1), in particular for an aircraft lifting surface (2), that comprises a primary control surface (6) that comprises a hinge axis (10), and a secondary control surface (7) that comprises a hinge axis (11), with the secondary control surface (7) rotating by means of its hinge axis (11) relative to the primary control surface (6), said secondary control surface (7) only partially occupying the span of the primary control surface (6), the length of the secondary control surface (7) along its hinge axis (11) being significantly less than the length of the primary control surface (6) along its hinge axis (10), and moreover the width or chord of said secondary control surface (7) along the direction of its hinge axis (11) narrows significantly towards the tip of the lifting surface (2) according to a law of narrowing designed expressly for adapting the distribution of torsional stiffness along the span of the lifting surface (2) to the distribution of aerodynamic load thereon, whereas the di

Abstract: A method of reducing drag of a leading edge device having first and second flow surfaces includes coupling the first flow surface to an airfoil and coupling the second flow surface to the first flow surface. The leading edge device may be moved between a retracted position and an extended position. The second flow surface may be positioned generally behind the first flow surface during at least a portion of the movement of the leading edge device between the retracted and extended positions.

Abstract: A wing for an aircraft is provided, including at least a first wing portion configured for providing high-lift mild stall characteristics at least at Reynolds numbers in the range between about 0.3*106 and about 2.0*106, and at least a second wing portion comprising a substantially permanently slotted aerofoil arrangement. Also provided are an air vehicle including such wings, a method for operating an aircraft, and a method for designing an aircraft wing.

Abstract: A rail switch for a conveyor assembly is provided. The rail switch includes a switch mounting for mounting rail sections. The rail switch includes a first rail section having a first end, a second end, a first face and a second face, as well as a receptor portion for receiving a first gate, an aperture located between the first end and second end through which a first connecting portion of the switch mounting is inserted, and a first weld mounting on the first face and a second weld mounting on the second face of the first rail section securing the first rail section and switch mounting together.

Abstract: A clamp apparatus including a first strap and a second strap. The first strap including an attachment end for attachment to an associated structural member, an intermediate portion having a first radius of curvature for contacting an elongate article, and a connection end having a first aperture for receiving a fastener. The second strap including an attachment end for attachment to an associated structural member, an intermediate portion having a second radius of curvature for contacting the elongate article, and a connection end having a second aperture for receiving the fastener. The first radius of curvature is different from the second radius of curvature.

Abstract: The invention concerns a display support element for a bracelet and/or a wristwatch comprising: a central element for receiving a bracelet or wristband and having a longitudinal axis substantially parallel to the longitudinal axis of the wristband or bracelet, the central element being flexible along its longitudinal axis, and two lateral elements, secured to the central element so as not to hinder the flexibility thereof, the lateral elements defining, with the central element, a substantially closed volume.

Abstract: A base apparatus for providing engagement to advice holder is provided, including a connection unit, a fixed unit, and at least a weight unit. The connection unit is for connecting a clapper or holder of electronic device, and the fixed unit is engaged to the bottom of the connection unit. The weight unit is sandwiched between and partially contained within the boundaries of the connection unit and the fixed unit. The weight unit includes a wrap means, an anti-slip means, and at least a weight object. The boundaries of the anti-slip means and the wrap means are engaged together to form a space for accommodating the weight object.

Abstract: A parallel four-bar mechanism is disclosed, having the second and third bars being parallel to each other and having their opposite ends hinged to the first and fourth bars respectively. A stopping block is provided with a stopping slot, and a movable stopping pin is configured to be engageable with the stopping slot. When an actuating member drives the stopping pin to disengage from the stopping slot, the second and third bars are able to translate relative to each other; and when the actuating member drives the stopping pin into the stopping slot, the second and third bars are locked with each other, with the second and third bars not being able to translate relative to each other, and thus the whole parallel four-bar mechanism is locked in a preset angular position.