50 results about "Head-hitting" patented technology

The invention discloses a method for preventing and controlling rockburst by an artificial space defect body. Firstly, one or more pressure relief roadways are excavated in the high stress dangerous area of ​​rockburst, and three boreholes are drilled in the head of the pressure relief roadway. The boreholes are drilled along the centerline of the roadway, and the holes on both sides are drilled obliquely forward at an angle of 30° based on the centerline of the roadway, so that the coal seam can be relieved by deep hole blasting; Drilling, and finally blasting from the head of the roadway to the back of the roadway. The invention changes the stress distribution by creating a large defect space in the high-stress coal body, the stress is far away from the roadway, the coal body around the roadway is destroyed, the energy is greatly released, and the risk of impact is fundamentally reduced.

An iron club head includes a striking plate for striking a golf ball and a body. The body includes an elastically deformable thin wall. An opening is defined in a front side of the body and surrounded by the thin wall. The striking plate is bonded in the opening. The thin wall has a thickness smaller than that of the striking plate. When the iron club head hits a golf ball, a momentum of striking generated as a result of hitting the golf ball causes elastic deformation of the striking plate and the thin wall to increase an overall deformation of the iron club head.

The invention relates to a range hood, which especially relates to an air inlet structure of the range hood. Aiming to the incomplete smoke and oil suction shortcoming of the range hood of the prior art, the invention discloses a range hood which has both the advantages of a top inlet range hood and a side inlet range hood. The invention has the technical scheme that the top-side range hood comprises a panel, a smoke collection cover and a blower; the panel is connected with the smoke collection cover; the panel comprises a lateral panel and a top panel; a lateral air inlet is mounted on the lateral panel; and a top air inlet is mounted on the top panel. The invention has the beneficial effects that the range hood has the shore distance smoke and oil suction effect of the side inlet range hood and effectively solves the upward escaping problem of the residue smoke and oil of the side inlet range hood; the range hood has both the advantages of the top inlet range hood and the side inlet range hood with a more complete smoke and oil suction effect; the range hood is also characterized in the avoidance of head hitting and oil dripping and the beautiful appearance.

A vest can be worn by a visually impaired pet, such as a dog, to help the pet navigate without hurting themselves by bumping into walls or objects. The vest includes plastic tubing with wire woven therein. The tubing is shaped like a halo that surrounds the front and sides of the pet's head. Should the visually impaired pet run into an object or wall, the halo will hit before their head hits and the pet will turn away before injuring themselves. The vest can be worn about their torso with their front legs fitting in leg holes of the vest. The vest can be adjustable to fit a range of pet sizes. The halo can also be adjustable to provide safe navigation of the pet. Typically, the vest is designed for dogs, but other visually impaired pets or animals may benefit by using the vest.

The invention provides an airbag type safety helmet. The airbag type safety helmet comprises a helmet body and a buffering rack arranged in the helmet body, wherein the helmet body is provided with a power supply, a gravity sensor and an airbag groove; an opening of the airbag groove is arranged outward; an airbag is arranged in the airbag groove; an airbag cover is arranged on the airbag groove; an inflation hole of the airbag is connected with a gas generator; the gas generator is connected to the gravity sensor; and the gravity sensor is connected with the power supply. Once a worker falls off, the gravity sensor induces weight loss and then the gas generator is triggered to work to generate a lot of gas to inflate the airbag instantly; and before a head hits the ground, an inflation step is finished by the airbag, so that the head can be really protected and casualty accidents are reduced.

A shock and impact testing device includes a shock and impact module and a control module. The shock and impact module includes a platform, an air cylinder having a rod, an impact head positioned on the platform aligning with the rod, and a lifting structure connected to the platform to drive the platform to rise and then release the platform to allow the platform to fall down freely until the impact head hits the rod. The control module calculates a pressure of the air cylinder and a height difference between the impact head and the rod, and controls the lifting structure to drive the platform to rise to a height difference between the impact head and the rod meets the calculated height difference and adjusting a pressure of the air cylinder to meet the calculated pressure.

The invention discloses a car front wall upper plate assembly. The car front wall upper plate assembly is of an opening suspension structure, namely, the bottom of a front baffle plate is suspended and an opening is formed between the bottom of the front baffle plate and the bottom of a rear support plate. Correspondingly, when an adult pedestrian is hit by the front part of a car, the pedestrian body falls toward the car and the pedestrian head hits against the front baffle plate of the car front wall upper plate assembly; as the suspended bottom of the front baffle plate is not restricted by other structures, the front baffle plate is capable of recessing toward the rear support plate under the hitting of the pedestrian head, energy absorption is carried out on the hitting of the pedestrian through the deformation of the front baffle plate due to the recession toward the rear support plate and the damage caused to the pedestrian head can be reduced. Moreover, through a reinforcing plate arranged on the rear support plate, the strength loss generated to the car front wall upper plate assembly by the opening suspension structure can be made up to a certain extent, so that the strength requirement of the car front wall upper plate assembly is considered while the pedestrian safety is ensured.

A method of producing bicycle ratchet bushing is provided, wherein an alloyed fundamental material is applied to the processes of a modeling process and a detailing treatment to form a product of bicycle ratchet bushing. Wherein, when the processes of drilling and tapping a hole of the modeling process are completed, the tapped hole of the workpiece is connected to a screw rod, and the screw rod is clamped by a drawing machine, so that the workpiece can be penetrated through the mold of the drawing machine to proceed with the drawing process. When the drawing process is working, it is not necessary to apply a head-hitting process to the workpiece as the conventional drawing method does, therefore the outer teeth of the ratchet of the workpiece will not be deformed by an external force, and can penetrated into the mold for further drawing process, therefore the whole manufacturing processes can be controlled efficiently.

The invention discloses a badminton training plate and relates to the technical field of badminton. The badminton training plate is used for solving the problem that one person cannot do badminton training. The badminton training plate comprises a bracket, a lining plate and a rebound plate, the bracket is provided with the obliquely arranged lining plate, the angle between the lining plate and the vertical direction is 0 to 45 degrees, and the lower part of the lining plate is close to the trainer; the lining plate is provided with the rebound plate made of a thermoplastic elastomer. According to the badminton training plate, the bracket is provided with the obliquely arranged lining plate, the lining plate is provided with the rebound plate made of the thermoplastic elastomer material, the hit badminton head can rebound to the badminton hitter after the badminton head hits against the rebound plate, and therefore, the badminton hitter can do badminton hitting training through the training plate, and the training plate is simple in structure, convenient to operate and convenient to move and transport.

The invention discloses a full-cover carton sealer comprising a workbench and a conveying device. A hitting mechanism and a folding, pressing mechanism and a sealing mechanism are sequentially arranged on the upper side of the workbench. The conveying device is used for conveying a carton to enable the carton to sequentially pass through the hitting mechanism, the folding and pressing mechanism and the sealing mechanism. The hitting mechanism comprises a guide hook, a hitting head and a partition plate. The guide hook is used for leading in the carton. The partition plate is used for hitting and pressing front opened covers of the led-in carton. The hitting head hits and presses back opened covers of the carton. The folding and pressing mechanism comprises a pressing rod used for hitting and pressing opened covers on one side of the carton and a folding and pressing plate used for folding and pressing opened covers on the other side of the carton. The sealing mechanism is used for sealing the carton with the four sides being folded and pressed. The full-cover carton sealer can seal all covers of the carton and greatly improves the sealing efficiency.

The invention relates to a lawn mower used for mowing lawns in courtyards, parks, and sides of roads, and other places. The lawn mower has three wheels, and reduces one of four wheels in a conventional four-wheel lawn mower, so turning and back-up are more flexible. The three-wheel lawn mower which has rotation angle in-gears of a grass head hitting flat rod to turn up a single front wheel is a series excited machine electric lawn mower having a chassis anticollision safety brake with a function wave disk. The lawn mower comprises an anticollision protecting device arranged on the front part of a lawn mower chassis, a brake with a function wave disk, the brake being arranged on the middle part of the lawn mower chassis, and a grass blocking pulling device and a grass shatter prevention device controlled by a remote stay cord.

Fall-resistance child-friendly bed comprises cribs or double-deck cribs of different types with fences everywhere except for inlets and outlets; the fall-resistance child-friendly bed further comprises a fencing block which is arranged at the front end of each internal outlet of two ends of the fence outlet and is connected with the fence, the upper end of the fencing block is arranged with a permanent magnet; the tops of four corners of the fence are provided with a folded mosquito net rod grafting hole respectively; the fencing block at the fence outlet is internally provided with a movable fence, two ends of the internal side at the bottom of the movable fence are articulated with the internal side of bed edge by a hinge, two ends at the upper end of the movable fence and two positions corresponding to the permanent magnet fencing block are respectively provided with a corresponding permanent magnet. Compared with existing cribs, the bed has the characteristics that the mosquito net is convenient to be hung so as to prevent children from being bit by mosquitoes, the movable fence prevents the child from falling off the bed and getting the head hit in sleeping process and careless playing, which results in impacting level of intelligence, the opening and closing of the movable fence are convenient and do not influence the speed for getting in and out of the bed, thereby, parents can save time and energy in taking care of the child during sleeping.

The invention provides a percussion mallet. The percussion mallet comprises a mallet head, a mallet rod and a mallet handle, the mallet rod is connected between the mallet head and the mallet handle, and the mallet rod is made of an elastic material. Because the mallet rod is made of the elastic material, in dependence on the elasticity of the mallet rod, the percussion mallet is elastic, by means of the reaction force generated when the mallet head hits keys, the mallet head can reciprocate up and down to vibrate in a certain amplitude quickly, a string of dense and short sounds is generated, the percussion mallet can play continuous and dense long tremolo and short tremolo, sustained tone, sliding tone, vibrato and the like, the sound effect can be improved, and the percussion mallet is beneficial to playing a musical instrument. In addition, the invention also provides a percussion instrument provided with the above percussion mallet.

The invention discloses a multistage crusher. The multistage crusher comprises a barrel-shaped shell, a feed opening is formed in the upper end of the shell, a discharge opening is formed in the lower end of the shell, the inner wall of the shell is provided with a lining plate, the lining plate is provided with multiple layers of annular partition plates, a crushing cavity only with the inner annular face opened is formed by the two adjacent partition plates and the lining plate in an enclosure mode, and at least one baffle is vertically arranged in each crushing cavity; a central rotating shaft extending up and down is installed in the shell, a rotating shaft sleeve or a hammer disc which coaxially rotates with the central rotating shaft is arranged on the central rotating shaft in a sleeving mode, hammering heads are installed on the rotating shaft sleeve or the hammer disc, each hammering head extends into the corresponding crushing cavity, and the crushing cavity on each layer at least corresponds to one hammering head; the hammering heads hit materials into the crushing cavities, the materials impact with the lining plate, the partition plates and the baffles in the crushing cavities, and meanwhile the materials mutually impact for crushing; the crushed materials enter the crushing cavity on the next layer for another time impacting till the materials are discharged out of the discharge opening. The phenomenon that the materials are in the crushing cavity on the same layer and do not fall into the crushing cavity on the next layer along with movement of the hammering heads is avoided.

The invention provides a head hitting preventing desk for an infant. The infant head hitting preventing desk comprises a desk and desk legs, wherein the desk is connected with the desk legs; alarms are mounted on the desk legs; infrared probes are mounted on the middle parts of four edges and four corners of the desk; a switch and a battery are mounted at the edge side of the left part of the desk; the switch is electrically connected with an electric wire; the electric wire is electrically connected with the alarms and the front infrared probe; the front infrared probe is electrically connected with the left infrared probe, the left upper infrared probe, the rear infrared probe, the right upper infrared probe, the right infrared probe, the right lower infrared probe and the left lower infrared probe in parallel. According to the infant head hitting preventing desk, the infrared probes and the alarms are mounted on the desk or other furniture; when the infrared probes detect that people hit the desk, a warning is sent so as to prevent the head hitting pain caused by carelessness of the infant; if some objects are put aside the desk, the switch at the edge side of the desk can be pressed and the power supply can be switched off. Therefore, a user does not need to worry that the head of the infant is hit and safety is realized.

The invention discloses a head-neck flank damping structure, a safety headrest and a child safety seat. The head-neck flank damping structure comprises a flank supporting skeleton, a flank supportingpiece, a damping mechanism, a protecting cover and an energy absorbing piece; the flank supporting skeleton is connected with a headrest skeleton, the flank supporting piece is connected with the headrest skeleton, and the damping mechanism is arranged on the inner side of the flank supporting skeleton and comprises a frame structure arranged around and a damping groove formed in the frame structure; the protecting cover is arranged outside the flank supporting piece and connected with the flank supporting piece; and the inner side of the damping mechanism is covered with the energy absorbingpiece, a buffering cavity is formed between the protective cover and the flank supporting piece, and the buffering cavity communicates with the damping groove. The head-neck flank damping structure has the advantages that deformation of the energy absorbing piece is larger through forming of the damping groove, and the situation that the head hits a hard plate behind the energy absorbing piece, consequently, buffering is insufficient, and damage is caused is avoided.

A game robot toy comprises a robot toy, a power source, a shoulder counterweight, a shoulder steering gear, a voice player, a elbow steering gear, an arm counterweight, a fist counterweight, a wrist steering gear, a waist counterweight, an ankle steering gear, a sole counterweight, a leg counterweight, a knee steering gear, a hip steering gear, a signal receiver, a controller and a remote control. The controller is used for controlling the shoulder steering gear, the elbow steering gear, the wrist steering gear, the ankle steering gear, the knee steering gear and the hip steering gear to start up and shut down to realize the movement and game playing of the robot toy. The voice player is used for playing the dubbing of the head-hitting game action. According to the technological means, the game robot toy has the beneficial effects that the game robot toy reasonably layouts the body structure and equipment to make sure it has reasonable weight and stable gravity center and it has good fighting game. It has flexible action and smooth movement which increases the interest of fighting game of robot toy, fits the mighty external image of the robot toy and improves the market attractiveness of the robot toy.