148results about How to "Easy to use and stable" patented technology

Disclosed are foldable carts, and connecting and stabilizing mechanisms of foldable carts. A foldable cart includes first and second frames pivotally connected to each other by a connecting and stabilizing mechanism. The connecting and stabilizing mechanism allows the first and second frames to rotate toward or away from each other, and thus allow the cart to fold and unfold. The connecting and stabilizing mechanism includes positioning pins and corresponding slots to receive the positioning pins, and thus prevent the cart from folding unintentionally.

The present invention relates to an air quality notifying device connecting an air quality measurement device and a wireless terminal, and an air quality notifying method therefor, which can transmit, to a wireless terminal, and check a measurement value measured in a gas measuring instrument measuring the types and concentrations of various gases maintained in the atmosphere, such that ordinary people can easily recognize the measurement value by handling a measurement place and a situation suitable thereto and performing a notification function. That is, the air quality notifying device connecting an air quality measurement device and a wireless terminal comprises: an air quality measurement device (10) comprising a gas detection sensor (11) for measuring the types and the content of various harmful gases dispersed in the atmosphere, an environment measurement sensor (12) for respectively measuring the temperature, humidity, and fine dust or the like of a gas measurement place, an air quality determination module (13) for deriving a measurement value by collecting and determining an air quality state in the atmosphere according to the detected detection gases and the content thereof, and the surrounding environment such as temperature, humidity, and fine dust, an air quality communication module (14) for transmitting, to the outside, through communication facilities, the measurement value of air quality derived from the air quality determination module (13), and a notification module (15) for notifying the outside of a risk if the measurement value of the air quality derived from the air quality determination module (13) is measured as a set value or more; and a wireless terminal (20) comprising a communication control module (21) for receiving the air quality measurement value by connecting, through communication, to the air quality communication module (14) of the air quality measurement device (10), air quality data (22) for storing, as database, characteristics of various harmful gases, the degree of harmfulness according to the content of harmful gases in the air, and a coping method with respect to a detected place, an air quality measurement application (23) programmed to substitute the air quality measurement value received through the air quality measurement device (10) with a data value stored in the air quality data (22) so as to collect situation explanations and coping plans according to the substituted air quality measurement value, a display checking module (24) for displaying, so as to check, the air quality measurement value and the respective situation explanations and coping plans according to the air quality measurement value collected through the air quality measurement application (23), and an application operating unit (25) for selectively controlling and driving the air quality measurement application. Therefore, the air quality notifying method connecting an air quality measurement device and a wireless terminal sequentially progresses by: an air quality determination step (100) comprising an air quality value deriving step (130) of determining an air quality state in the atmosphere according to harmful gases and environments measured by respectively carrying out a harmful gas measurement step (110) of dividing, by type, harmful gases maintained in a measurement place through a gas detection sensor (11) while the air quality measurement device (10) is maintained in the measurement place and measuring the content of the harmful gases, and an environment measurement step (120) of measuring the temperature, humidity, and fine dust through the environment measurement sensor (12) provided in the air quality measurement device (10); a communication connecting step (200) of selectively executing the air quality measurement application (23) downloaded in the wireless terminal (20) so as to connect the communication of the air quality measurement device (10) and the wireless terminal (20); an air quality value receiving step (300) of receiving, in the air quality measurement application (23), through the communication control module (21), an air quality determination value measured from the air quality measurement device (10) through the communication connecting step (200); an air quality value displaying step (400) of deriving, in the display checking module (24) of the wireless terminal, an air quality measurement value inputted into the air quality measurement application through the air quality value receiving step (300); an air quality value substitution step (500) of dividing the air quality value displayed through the air quality value displaying step (400) into respective harmful gases or combining the same into a plurality of harmful gases through the application operating unit (25), and substituting the gases to the database stored in the air quality data (22); a coping plan displaying step (600) of deriving, in the display checking module (24), coping plans according to an air quality state in which all gases divided or measured according to the types and the concentration of the respective gases substituted through the air quality value substitution step (500) are combined; a coping plan checking step (700) of determining whether the coping plans derived in the display checking module (24) through the coping plan displaying step (600) are checked; and an emergency calling step (800) of making an emergency call by specified another communication if the air quality state of the coping plans derived through the coping plan displaying step (600) has a set value or more, or if the air quality state derived through the coping plan checking step (700) indicates a danger level, such that the air quality of a measurement place is precisely measured and the coping plans can be quickly searched for according to the air quality, thereby using the coping plans.

The invention relates to a mistaken-climbing-preventing stopper which comprises a clamping ring 1-1 and a clamping ring 1-2. The left sides and the right sides on the portion, close to the middle position, of the outer side walls of the clamping ring 1-1 and the clamping ring 1-2 are provided with locking bolts. The fixed ends of the locking bolts are provided with antiskid iron. Fixing holes are formed in the middle and the left and right sides of the outer side walls of the clamping ring 1-1 and the clamping ring 1-2, the fixing holes are threaded holes, warning rods are inserted into the fixing holes, a U-shaped groove is formed in one end of the clamping ring 1-1, a protruding clamping key is arranged at one end of the clamping ring 1-2, positioning holes are formed in the middles of the U-shaped groove and the protruding clamping key, the other end of the clamping ring 1-1 and the other end of the clamping ring 1-2 are provided with connecting keys respectively, a pin penetrates in the positioning holes in the U-shaped groove and the protruding clamping key, positioning holes are formed in the connecting keys, a butting bolt penetrates through the positioning holes, and a fixing nut matched with the butting bolt is screwed to the butting bolt. The mistaken-climbing-preventing stopper has the advantages of being simple in structure, good in protection performance and low in manufacturing cost.

The invention provides a water coaster. In the middle of the coaster that can be put into a water cup, there is a hole that matches the bottom of the water cup. Several distributed water receiving holes are arranged around the hole. , the water cup can be stably placed on the coaster after it is filled with water, and the water receiving holes set around it can receive the tea spilled from the cup to avoid polluting other placed objects on the table. It has the characteristics of stable and convenient use of the water cup.