81 results about "Forward sliding" patented technology

The invention provides a firework inner barrel feeding device and method and combined firework production equipment, and relates to the technical field of firework production equipment, and the firework inner barrel feeding device comprises a first layer platform, a first pushing mechanism and a second pushing mechanism. An inner cylinder can be vertically placed on the first layer of platform, and a plurality of flow dividing channels and feeding sliding ways are arranged on the first layer of platform. The first pushing mechanism is provided with a first pushing piece used for pushing the inner cylinder and a first driving assembly. The first driving assembly is used for driving the first pushing piece to act; the first pushing piece is used for pushing the inner barrels in the feeding sliding way from the rear portions of the inner barrels to the front portions of the inner barrels so that the inner barrels in the feeding sliding way can be kept in a gathering state when sliding forwards. The second pushing mechanism comprises a second pushing piece, a protecting and holding piece and a second driving assembly; the second driving assembly is used for driving the second pushing piece and the protecting and holding piece to act; the second pushing piece and the protecting and holding piece are both located behind the first pushing piece. According to the feeding device, the inner barrel can be prevented from toppling over in the inner barrel feeding process, and the continuity of the feeding process is ensured.

A folding knife having a blade pivoted from a closed position to a manual release open locked position with a combined apertured sliding release and locking arm. The sliding release and locking arm is mounted within the knife handle on a fixed guide pin within an arm opening being spring urged there against. Arm positioning pins extends in oppositely disposed relation to one another from the locking arm providing dual frame engagement within respective guide slots therein. Arm positional projections are engaged on a modified blade shank during operation moving the locking arm back and up then releasing to slide forward locking the blade in auto open use position until manual arm engagement by the user against the arm spring and blade spring for release and transitional closure. Arm access operation is available secondarily via pin access opening in the exterior handles for alignment operation.

The I-shaped steel welding tool for green building construction comprises a machine tool, a conveying pipe and a workpiece, the machine tool is provided with a clamping and conveying assembly, the clamping and conveying assembly is used for conveying and clamping the workpiece, the machine tool is further provided with a positioning and clamping assembly, and the positioning and clamping assembly is used for clamping and fixing the two ends of the workpiece when the workpiece is welded. A cooling assembly is arranged on the machine tool and used for cooling the welding end of the workpiece when the workpiece is welded. According to the clamping device, the motor is started to drive the half gear to rotate so as to drive the first rack to slide on the first guide rod in a reciprocating mode, when gear teeth at the upper end of the first rack are meshed with the first gear, the two clamping plates slide oppositely to clamp a workpiece, and the gear teeth at the upper end of the first rack are shorter than the lower end of the first rack; and the half gear can drive the first rack to continuously slide forwards until the lug at the tail end of the first rack drives the whole mounting box and the workpiece to slide forwards.

The present application relates to coal mine supporting technical field, specifically to a kind of lifting type supporting device for underground coal mine, including base, support column, mobile jack, hydraulic controller, protective beam, roof beam plate, support assembly, connecting assembly, moving assembly and contact zone;Support assembly extends outside roof beam plate in initial state, when supporting device needs to move forward, the support column is relieved, after the base and roof beam plate slide forward a standard step, the support column is raised and supported, the connecting assembly is disconnected, support assembly returns to inside roof beam plate, after moving assembly pushes support assembly forward a standard step, support assembly extends outside roof beam plate, and connecting assembly is connected with the connecting assembly of two side supporting devices, solve the problem that when the rock layer above is too loose, when hydraulic support removes support, the loose rock on top can not wait for the "stress arch" of adjacent frame to form completely, and instantaneously collapse.

The utility model discloses an automobile seat capable of integrating leg support and cushion extension functions, which comprises a leg support assembly and a cushion assembly, the cushion assembly comprises a seat frame skeleton, a seat basin bracket and a cushion extension plate, the seat frame skeleton and the seat basin bracket are mutually fixed, a fixed bracket is fixedly arranged on the seat frame skeleton, a movable bracket is connected to the fixed bracket in a front-back sliding manner, and the cushion extension plate is arranged on the movable bracket. A driving mechanism is arranged between the movable support and the fixed support and can drive the movable support to slide front and back along the fixed support, the rear end of the leg support assembly is fixed to the movable support, and the cushion extension plate is arranged at the front end of the top face of the seat basin support, connected with the seat basin support in a front-back sliding mode, penetrates through the seat basin support and is fixedly connected with the movable support. When the driving mechanism drives the movable support to slide forwards, the seat cushion extension plate can be driven to slide forwards so as to lengthen the seat cushion, and meanwhile the leg support assembly can be driven to move forwards as a whole. Reasonable integration of the leg support and the cushion extension function is achieved, and interference between the leg support and the cushion extension function is effectively avoided.

The utility model discloses an automobile seat capable of integrating cushion height adjusting and backrest flattening functions, which comprises a backrest assembly and a cushion assembly, the cushion assembly comprises a seat frame skeleton, the lower end of the seat frame skeleton is provided with a height adjusting mechanism, the lower end of the backrest assembly is hinged with the rear end of the seat frame skeleton through an angle adjuster, and the backrest assembly is connected with the backrest assembly. The seat cushion assembly further comprises a seat cushion upper support assembly, the seat cushion upper support assembly is arranged above the seat frame framework and connected with the seat frame framework in a front-back sliding mode, a driving mechanism is arranged between the seat cushion upper support assembly and the seat frame framework, and the driving mechanism can drive the seat cushion upper support assembly to slide front and back along the seat frame framework. The whole seat cushion upper support assembly is obliquely arranged in the mode that the front portion is high and the rear portion is low, and when the driving mechanism drives the seat cushion upper support assembly to slide forwards, the rear end of the seat cushion assembly can provide space for the backrest assembly to be turned flat, so that the backrest assembly can be turned flat forwards. According to the utility model, integration of two important functions is realized in one seat structure, and the use convenience and practicability of the seat are improved.

This invention belongs to the field of conveying equipment technology and discloses an asymmetrical workpiece conveying direction reversal device based on chain tooth transmission, including a ring conveying unit, a horizontal holding assembly, a reverse / forward pushing cylinder assembly, and a reverse / forward slide assembly. The ring conveying unit is equipped with a ring guide rail and a sprocket mechanism arranged along a vertical plane. The horizontal holding assembly is driven by a chain and slides synchronously along the guide rail, sequentially passing through the feeding, detection, reverse pushing, and forward pushing stations. The horizontal holding assembly achieves stable horizontal conveying of the workpiece pallet throughout the entire process by meshing a horizontal holding gear with the guide half gear of the central guide assembly in a 1:1 ratio, and cooperating with the guide notch and strip protrusion for limiting. After visual detection identifies the front and back of the workpiece, the reversed workpiece is flipped over via the reverse slide, and the front workpiece is directly conveyed via the forward slide, ensuring that the front faces upward. This invention eliminates the need for machine downtime and reciprocating reset, allowing for continuous and stable operation, effectively preventing workpiece displacement and overturning, and improving production cycle time and versatility.

The utility model discloses an agriculture and forestry picking device with a shearing mechanism, which comprises a main body unit, the main body unit comprises a fixed mounting piece, an upper fixing plate is rotatably connected in the fixed mounting piece, and a connecting frame is fixedly connected to the surface of one side of the upper fixing plate. The driving motor can drive the threaded rod to rotate, the threaded barrel in threaded connection with the threaded rod can push the moving plate to move forwards, the sliding rod fixedly connected with the moving plate slides forwards on the surface of the inner wall of the sliding groove, and then the shearing blade is driven to oppositely rotate on the inner wall of the connecting frame. Meanwhile, a fixing shaft fixedly connected with the shearing blade pushes a positioning rod to translate, a connecting plate fixedly connected with the positioning rod translates on the surface of a limiting rod, the limiting rod fixedly connected with the positioning rod clamps and positions the grape vines, and then the shearing blade shears the grape vines short, so that the number of driving mechanisms can be reduced, and the structure is simplified.

The utility model discloses a protection device for a water conservancy slope, which relates to the technical field of slope protection and comprises a slope protection main body, a guide plate is arranged on the front side of the slope protection main body, a cleaning mechanism comprises symmetrical sliding rods, the sliding rods are fixedly connected with the guide plate, the sliding rods are connected to the front end of the slope protection main body in a sliding manner, symmetrical sliding grooves are formed in the inner bottom wall of a through groove, and the sliding grooves are communicated with the guide plate. The top of the rear end of the sliding rod is fixedly connected with a connecting base, the upper end of the connecting base is fixedly connected with a movable inclined plate, the movable inclined plate is slidably connected into the through groove, the movable inclined plate is parallel to the inclined face of the slope protection body, and a plurality of equidistant filter baskets are fixedly connected to the movable inclined plate. The device has the beneficial effects that a guide plate drives a connecting base to slide towards the rear end of a sliding groove, so that a movable inclined plate drives a plurality of filter baskets to slide into a through groove, then the guide plate is far away from a slope protection body, the movable inclined plate drives the filter baskets to slide forwards, and at the moment, water flow moves in the direction far away from the slope protection body; garbage in water flow is filtered out through the multiple filter baskets.

The quick-locking Christmas tree base includes a cylindrical section with a central receiving cavity. Locking sections are evenly spaced along the side walls of the cylindrical section, and a through hole is located on the top side wall of each locking section. A push rod bolt passes through the cylindrical section from the outer end of the locking section to the receiving cavity. A stop mechanism is located at the top of the locking section, comprising a sliding key, a stop plate, and a spring. The stop plate is fitted onto the outer wall of the bolt and engages between the second groove at the bottom of the sliding key and the first groove at the rear end of the mounting groove. Under the continuous pushing of the spring, the stop plate tilts backward, restraining the push rod bolt and preventing it from retracting. When fixing the tree trunk, simply push the push rod bolt forward. After fixing, the stop plate automatically returns to its natural state under the force of the spring, preventing retraction. For enhanced locking and position adjustment, the push rod screw can be rotated for adjustment. To unlock, slide the sliding key forward to the front of the opening and hold it; the push rod bolt can then be removed.

The utility model relates to the technical field of assembly tool, specifically relates to a kind of auxiliary assembly tool for vehicle wheel hub dust cover;Including base and mounting mechanism, mounting mechanism includes support seat, positioning plate, datum plate, limiting plate, plug, bolt, T-shaped threaded sleeve, adjusting device and locking device, first control locking device automatic relaxation, then remove two bolts after removing limiting plate and plug, the wheel hub clamp on positioning plate can be directly forward sliding to take out to complete disassembly, when wheel hub clamp disassembly, after locking device automatic relaxation, remove two bolts after directly removing limiting plate and plug can directly disassemble, the number of disassembly bolt is less in structure, and positioning pin structure does not need to be set, more conducive to convenient disassembly, in turn can be conducive to wheel hub clamp to realize quick replacement when wheel hub dust cover assembly is carried out.

The utility model relates to the technical field of logistics management, and discloses an intelligent logistics cargo fixing device which comprises a main supporting plate, a clamping structure is arranged on the upper surface of the main supporting plate, a movable clamping plate is connected to the surface of the clamping structure in a threaded mode, a movable groove is formed in the surface of the movable clamping plate, and the movable clamping plate is connected with the main supporting plate in a threaded mode. And a movable rod is movably connected into the movable groove. The clamping structure is roughly adjusted, then the round blocks are sequentially pushed towards the rear end, the shapes of the round blocks accord with the pushing of a palm, so that the movable rod slides in the movable groove, the clamping groove is shaped like a right trapezoid, and the inclined clamping block is also shaped like a right trapezoid matched with the clamping groove. By means of the device, the problem that due to the fact that the sizes of the logistics goods are different, the small logistics goods cannot be fixed in the fixing process, and consequently the logistics goods shake in the transportation process is solved.

The invention relates to a sliding door fitting for laterally moving a first sliding door and a second sliding door. The first sliding door is located on the front vertical plane when at the closing position and is located on the rear vertical plane when at the opening position. And the second sliding door is always positioned on the front vertical plane. The sliding door fitting is provided with a guide element with a main extension direction for guiding the sliding door to move. The guide element has a first guide rail region adapted to the first sliding door and a second guide rail region adapted to the second sliding door. The sliding door accessory is further provided with first sliding connecting pieces, and each first sliding connecting piece is provided with an elastic element. The first sliding connection can be moved in the region of the first guide rail in the main extension direction and also transversely to the main extension direction at the same time. The first sliding connection can be slid in the region of the first guide rail from a front sliding position transversely to the main extension direction against the restoring force of the elastic element. In addition, the sliding door accessory is further provided with a second sliding connecting piece. The second sliding connection is movably guided in the main extension direction in the linear guide structure of the second guide rail region.

The application provides a helicopter sliding passenger cabin door, and relates to the field of aviation machinery, which comprises a door, upper and lower sliding rails for the door to slide, a door frame matched with the door to open and close, and a locking mechanism for locking or unlocking between the door and the door frame, wherein the locking mechanism comprises an upper lock box assembly, a lower lock box assembly, a connecting rod assembly, an upper lock seat assembly, a lower lock seat assembly, a hook assembly and a hook limiting assembly; the upper lock box assembly and the upper lock seat assembly and the lower lock box assembly and the lower lock seat assembly are locked and matched to form lock points, two lock points ensure the stability of the door locking, and the force required for the operation of the hook is small, which is very convenient; the connecting rod assembly with rigid connection between the upper lock box assembly and the lower lock box assembly is used for transmission without motion stroke difference, which is synchronous, sensitive and reliable; the hook assembly and the hook limiting assembly are matched to limit the forward sliding of the door, so that the door can be kept in the open state.

The utility model provides a supporting and positioning mechanism which comprises a plurality of supporting and positioning assemblies. Each supporting and positioning assembly comprises a fixed base fixedly arranged at the front end of the lifting platform, a positioning piece penetrating through the fixed base in a front-back sliding mode, a guiding piece connected with the fixed base in a front-back sliding mode, a movable base located on the rear side of the fixed base and connected with the positioning piece and the guiding piece, and a driving device with the two ends movably connected with the movable base and the lifting platform correspondingly. The driving device is used for driving the movable base to move front and back and driving the positioning pieces and the guiding pieces to slide front and back. After the front end of the lifting platform is in butt joint with the rear end of the carriage, the positioning pieces slide forwards to the front ends, stretch out of the front side of the fixing base and are inserted into the positioning slots to limit the height reduction of the carriage. The multiple positioning pieces are used for supporting and positioning the upper and lower limiting positions of the rear end of the carriage, the rear end of the carriage is prevented from sinking excessively, it is guaranteed that the front end of the lifting platform and the rear end of the carriage are in a basically flush butt joint state all the time, and loading stability is guaranteed.

The application provides a pull rod device for an in-swinging and in-turning window and an in-swinging and in-turning window. The pull rod device comprises a window frame connecting assembly, a sash fixing rod, a long rod and a sliding block assembly. The sash fixing rod is provided with a sliding groove, the sliding block assembly is slidingly assembled in the sliding groove, and the long rod is hingedly connected with the window frame connecting assembly and the sliding block assembly at two ends. The side wall of the sliding groove is provided with a plurality of clamping openings, and the sliding block assembly comprises a sliding block, a swing rod and a spring piece. The upper surface of the sliding block is formed with an assembly groove, the swing rod is provided with a clamping convex, and the swing rod is outwardly assembled in the assembly groove. The spring piece is assembled between the sliding block and the swing rod, and during reverse sliding of the sliding block assembly in the sliding groove, the spring piece pushes the swing rod to make the clamping convex embedded in the clamping opening, and the swing rod prevents the sliding block assembly from forward sliding in the sliding groove. The application enables the in-swinging and in-turning window to be positioned at different in-turning distances, and meets different ventilation requirements.

The utility model discloses a splicing sewing machine belongs to sewing machine field, including base, the upper end fixed mounting of base has workstation, the upper side fixed mounting of workstation has sewing machine body, the upper side fixed mounting of workstation has mounting bracket, the front side of mounting bracket is provided with first limit block, the downside swing mounting of first limit block has second limit block, the rear end rotation mounting of mounting bracket has second drive roll, be provided with feeding assembly in first limit block and second limit block, through the design of feeding assembly makes curtain material to be able to stable, continuously send into sewing area, and through the sliding groove, sliding rod and first spring, first limit block and second limit block are slid forward, and then, the curtain material of feeding assembly delivery is kept tight, avoids the situation of folding to occur, reduces the manual operation of operating personnel, thereby reduces the labor intensity, avoids the human error, and improves product quality.

This utility model relates to the field of tracked equipment technology and provides a tracked towing mechanism, including a base, a clamp, and a translation component mounted on the base. Two sets of clamps are slidably mounted on the translation component, and a telescopic component is provided between the two sets of clamps. The clamps are provided with positioning pins for limiting the center hole on the track. This utility model utilizes the positioning pins on the clamps to align with the center hole of the track pin, clamping cylinder clamps the track, and at the same time, a horizontal slide slides forward a fixed distance. When the clamping cylinder releases, the horizontal slide slides backward back to its original position, repeating this process until the entire track is installed and transported on the conveyor rollers, achieving precise step-by-step transmission of the track on the conveyor rollers and meeting the requirements of automatic assembly equipment.

The utility model relates to a kind of aerial working platform safety protection devices, including base, base top two sides are all fixedly connected with a pair of side bars, a pair of side bars top is equipped with cover, two side bars of inside are opposite face front side fixedly connected with front side bar, rear side fixedly connected with the rear side bar with door, the gap between a pair of side bars is equipped with the side plate sliding forward, locking mechanism is equipped between side plate and side bar, two side plate front side fixedly connected with baffle, baffle bottom and base front side corresponding fixedly connected with connecting plate, two connecting plates opposite face between fixedly connected with the U-shaped organ type telescopic cover.The utility model can effectively avoid tool drop to ground when construction, reduce security risk.

A shoe having an insole with pressure relief rings for cushioning the metatarsal heads of the human foot and inhibiting the forward slide of the foot into the toebox. The pressure relief rings are made from a low-density foam will the surrounding material of the insole are mad with a high-density foam. In various embodiments the pressure relief rings are hollow, solid like a disc, or have a depression into the low-density foam. The shoe is also provided with a natural toebox, in which the point of the toe is shifted to the inside of the foot to have a more natural fit for the asymmetry of the human foot.

The present application relates to the technical field of door panel impact test, and discloses a kind of anti-blast valve impact detection device, including supporting device, hammering device, protection plate, control device, reinforcing device.Worker holds long rod and pushes the hammer change slide rod back into the clamping shaft, then manually rotates the hammer change cylinder, so that the through hole on the hammer change cylinder is aligned with the through hole on the hammer sleeve, then the impact shaft is pushed out from the hammer support by long rod, so that the first shaft body, the second shaft body and the axis of the hammer sleeve are aligned, then manually pull out two long rods, at this time, the spring on the hammer change slide rod drives the hammer change slide rod and the second shaft body to slide forward, so that the first shaft body extends from the limit cover, when the first shaft body is completely extended, the front end of the second shaft body is clamped by the inner wall of the limit cover, so that the impact shaft of different material types is replaced.

The utility model belongs to the technical field of steel member processing, provide a kind of steel member feeding device, the steel member feeding device includes machine table, and the machine table is equipped with material box respectively, clamping mechanism, the clamping mechanism includes the fixed base of left and right settings, transverse movement module, the front of fixed base is equipped with pneumatic claw disc, slidingly equipped with clamping pipe in the fixed base, the right end of clamping pipe is worn from the axis of pneumatic claw disc, rotating plate and push cylinder are equipped on the fixed base, the driving shaft of push cylinder is rotatably connected with the upper end of rotating plate, the lower end of rotating plate is rotatably connected with the tail end of clamping pipe, the right end of clamping pipe is opened with multiple broken slots. Broken slot setting in the front end of clamping pipe forms clamping petal, under the action of push cylinder and rotating plate, clamping pipe slides forward, cooperate pneumatic claw disc can realize the stable clamping of steel member, avoid steel member to slip in the conveying process, ensure the stability and reliability of feeding.

This utility model discloses a cold-cutting and sealing device for an extrusion blow molding machine, comprising: two fixed plates fixed on the extrusion blow molding machine; an adjusting plate disposed between the two fixed plates; a front cylinder and a rear cylinder respectively disposed on the front and rear side walls of the adjusting plate; a connecting plate connected to the rear cylinder; a guide rod disposed at each of the left and right ends of the connecting plate; the two guide rods sliding forward through the adjusting plate and connecting to the front blade holder; a front clamping plate disposed on the rear side wall of the front blade holder; a rodless cylinder disposed on the front blade holder; a rearwardly extending cutter disposed on the slide of the rodless cylinder, the cutter being located below the front blade holder; a rear blade holder connected to the front cylinder; the rear blade holder slidably locked between the two guide rods; and a rear clamping plate disposed on the front side wall of the rear blade holder, the rear clamping plate being horizontally aligned with the front clamping plate. The advantages of this utility model are its simple structure and its ability to ensure that the cut end of the tubular preform remaining in the molding die does not adhere and seal.

This utility model provides an automatic chip cleaning device for machining castings on machine tools, relating to the field of chip cleaning technology. It includes: a machine tool body; a tool holder mounted on the machine tool body, which can slide left and right on the machine tool body; a receiving plate fixed to the top surface of the tool holder; a tool mounting rod on the tool holder passing through the receiving plate; and the receiving plate having a rectangular plate structure that slides on the machine tool body. Firstly, the receiving plate on the tool holder is inclined at 20 degrees. This ingenious design allows chips generated during machining to automatically slide forward and collect, greatly improving chip cleaning efficiency, achieving automatic cleaning, and reducing manual cleaning workload. The auxiliary block further optimizes the chip handling process. Its right-angled trapezoidal structure and top surface with the same inclination as the receiving plate not only prevent chips from falling directly onto the machine tool body but also encourage the chips to continue sliding forward, laying a good foundation for subsequent collection.

The utility model relates to a child safety seat and a base thereof. The base comprises a fixing frame, a connecting frame, a clamping assembly and a buffering structure, wherein the connecting frame is arranged on the fixing frame in a sliding mode in the front-back direction and can be fixedly connected with an automobile seat. The clamping assembly comprises a clamping piece and a matching structure, the clamping piece is movably arranged on the connecting frame and moves front and back along with the connecting frame, the matching structure is arranged on the fixing frame, when the clamping piece is matched with the matching structure, the fixing frame is prevented from sliding forwards relative to the connecting frame, and when the fixing frame moves backwards, the clamping piece is separated from the matching structure; the fixing frame can slide relative to the connecting frame; the buffering structure is arranged on the fixing frame and located on the front side of the matching structure, when the fixing frame and the connecting frame relatively slide under the impact effect of external force, the clamping piece can move to the position where the buffering structure is located, the clamping piece and the buffering structure are matched to provide child buffering, and the safety performance of the safety seat is better.

The utility model relates to the technical field of steel wire rope processing, and discloses a cutting device for steel wire rope processing, which comprises a bottom plate, the top of the bottom plate is fixedly connected with an unfolding roller, the outside of the unfolding roller is rotatably connected with a steel wire rope main body, the top of the bottom plate is fixedly connected with a guide mechanism, and the top of the bottom plate is fixedly connected with a workbench. The top of the workbench is fixedly connected with a fixing mechanism. The fixing mechanism comprises a connecting plate, the bottom of the connecting plate is fixedly connected to the top of the workbench, the front side of the connecting plate is fixedly connected with a sliding assembly, the sliding assembly is fixedly connected with a connecting rod, and the bottom of the connecting rod is fixedly connected with a triangular plate. According to the steel wire rope cutting device, after the triangular plate rotates to drive the fixing rod connected with the connecting block to slide forwards to fix the steel wire rope body, the situation that the cutting position is inaccurate due to shaking and displacement of the steel wire rope in the cutting process can be effectively avoided.

The utility model relates to the technical field of plastic recycling and cleaning, and discloses a pretreatment equipment for waste plastic recycling and cleaning, which comprises a processing table, a collecting box is arranged on the top of the processing table, a cleaning assembly is arranged on the top of the processing table, a sorting assembly is arranged at the bottom of the cleaning assembly, the sorting assembly comprises a guide frame, the guide frame is fixed on the surface bottom of the connecting box, and a bearing part is fixedly connected to the left side of the guide frame. The pretreatment equipment for waste plastic recycling and cleaning is provided with the sorting assembly, which can drive the gear to rotate by starting the stepping motor part, then drive the meshing rack of the gear to slide forward or backward in the limiting seat, the inclination angle of the sorting plate part is reduced by forward sliding, the inclination angle is increased until the vertical state, the spring part can control the adjustment rate during angle adjustment, the sorting treatment can be carried out, the angle of the flexible sorting plate body is adjustable, and the plastic particles with different shapes and densities can be adapted.

The utility model relates to a side airbag device, a vehicle seat and a vehicle. The side safety air bag device comprises a first air bag part and a second air bag part connected with the first air bag part, the first air bag part is used for protecting the head of a passenger after being expanded and unfolded, the second air bag part is used for protecting the trunk of the passenger after being expanded and unfolded, and the first air bag part is provided with a retaining structure. The retaining structure is used to constrain forward slippage of the head. According to the technical scheme, the first air bag part is provided with the retaining structure, and the retaining structure is used for restraining the forward sliding of the head, so that the head is always kept in the protection area of the air bag, the head is prevented from colliding with the interior trim of the vehicle due to the forward sliding, and the risk of craniocerebral injury is reduced.

The invention discloses a high-transmission photoelectric sensor anti-falling protection device, which belongs to the technical field of sensors and comprises a device body mechanism, and a driving mechanism is mounted in front of the device body mechanism. If the whole sensor accidentally falls off from the mounting position, the small suction cup is automatically separated from the adsorption surface, at the moment, the pushing spring which is originally in a compressed state quickly releases elastic potential energy to drive the second gear strip to quickly slide forwards, and the movement drives the first gear strip at the other end of the first gear body to cooperatively move backwards through gear transmission; and then, the protective baffle automatically resets under the action of the structural design, an extending opening of the outer cylinder is effectively shielded, and at the moment that the whole sensor falls to the ground, the protective shell, the hollow disc and the protective baffle outside the sensor can effectively relieve impact, and internal precision components can be effectively prevented from being damaged. Particularly, the signal transmitting end and the signal receiving end provide sufficient protection, and damage caused by falling is avoided.