Abstract: The present disclosure relates to a device and a system for testing flatness. The device for testing flatness includes a base, a testing platform, and a ranging sensor. The testing platform is assembled on the base. The testing platform includes a supporting structure. The supporting structure is disposed on the side of the testing platform away from the base and is used to support a to-be-tested board. The structure matches the structure of the to-be-tested board. The ranging sensor is disposed on the side of the testing platform away from the base. After the to-be-tested board is placed on the testing platform, the ranging sensor is used to test distances between a number N of to-be-tested positions on the to-be-tested board and the ranging sensor, to obtain N pieces of distance information, and the N pieces of distance information are used to determine the flatness of the to-be-tested board, where N is an integer greater than 2.

Abstract: A folding device is provided. The folding device includes a bearing and fixing mechanism (1) configured to bear and fix a main body portion (21) of a to-be-folded device (2); a folding mechanism (3) located on at least one side of the bearing and fixing mechanism (1), the folding mechanism (3) being rotatably connected to the bearing and fixing mechanism (1) and configured to bear and fix a to-be-folded portion (22) of the to-be-folded device (2); and a driving mechanism (4) connected to the folding mechanism (3), the driving mechanism (4) being configured to drive the folding mechanism (3) to turn relative to the bearing and fixing mechanism (1), so as to fold the to-be-folded portion (22) to a side in a thickness direction of the main body portion (21). The folding device can fold automatically, and manual folding is avoided.

Abstract: A device integrated hot and cold tap water and hot and cold purified water including a casing pipe, a water guide mechanism, a touch switch, a microcontroller, a pulling head, and first and second magnetic components is provided. The water guide mechanism includes first and second pipelines disposed in the casing pipe. The first and second pipe lines are respectively provided with a first valve body and a touch control assembly. The touch switch and the microcontroller are electrically connected with the touch control assembly. The pulling head includes a fixed cylinder provided in a water outlet of the casing pipe and a bubble former fixed in the fixed cylinder. An interior of the bubble former has an inner waterway and an outer waterway. The first and second pipelines communicate with the water outlet of the casing pipe through the outer waterway and one end of the inner waterway, respectively.

Abstract: The invention discloses a fluid sensing device provided in a flow path through which fluid flows, including a base fixed in the flow path; a piston core rod disposed in the base and connected to the base through an elastic member, the piston core rod being provided with a pushing surface pushed by the fluid in the flow path; a magnet provided on the piston core rod; a magnetic sensing device provided on a side surface of the piston core rod to sense change of magnetic line received as change of position of the magnet, thereby determining whether fluid flows in flow path; wherein the elastic member is disposed such that direction of the restoring force thereof is opposite to the direction of fluid flow in flow path. The present invention has fewer parts and easy production, and can reduce judgement difference caused by low flow rate.

Abstract: The invention discloses a device integrated hot and cold tap and purified water, including: casing pipe providing with first and second pipeline respectively provided with first and second valve body; first pipeline comprising: first water inlet hose having both end communicated with cold water supply part of tap water and water inlet end of first valve body; second water inlet hose having both end communicated with hot water supply part of tap water and water inlet end of first valve body; connecting pipe having both end communicated with water outlet end of first valve body and outer waterway; one end of second pipeline provided with two branch pipes communicated with hot and cold water supply part of purified water, and the other end communicating with inner waterway. The invention has advantages that only one mounting hole is used to integrate hot and cold tap and purified water on a faucet.

Abstract: The present invention discloses a valve body structure facilitating maintenance of hose solving problem that prior valve body structure is inconvenient to install hose and unremovable. Valve body structure comprises hollow valve body, valve body provided with at least one water guide channel; hose inserted one end into valve body and connected with water guide channel, outer surface of one end of hose connected with water guide channel provided with clamping slot; clamping ring provided inside of valve body, which is located on the same plane as clamping slot, and one end of clamping ring provided with an elastic body which drives a clamping ring arm to locate in clamping slot and to clamp hose, if hose needs to be removed, compressing elastic body to move clamping ring arm away from clamping slot. The valve body structure facilitates user to repair or replace hose, and greatly saves user's maintenance costs.

Abstract: The disclosure provides a mechanical press-type switch valve core, which subverts usage of traditional switch valve core in control of water, switches from rotary switch to press-type switch, and reduces damage of switch handle during use. You can use other parts of body to press the switch (such as arms) when hands are inconvenient in use process. The appearance is relatively simple and generous in the use of the product. The mechanical press-type switch valve core is provided a compression spring between the pressing assembly and the blocking assembly for up-and-down movement acting on the water-blocked rod, and at the same time overcoming water pressure force of the water-blocked rod and O-shape sealing ring when the valve core is opened. The mechanical press-type switch valve core is sealed with the O-shape sealing ring, which is a static seal, and has high sealing life.

Abstract: The present invention discloses a valve body structure facilitating maintenance of hose solving problem that prior valve body structure is inconvenient to install hose and unremovable. Valve body structure comprises hollow valve body, valve body provided with at least one water guide channel; hose inserted one end into valve body and connected with water guide channel, outer surface of one end of hose connected with water guide channel provided with clamping slot; clamping ring provided inside of valve body, which is located on the same plane as clamping slot, and one end of clamping ring provided with an elastic body which drives a clamping ring arm to locate in clamping slot and to clamp hose, if hose needs to be removed, compressing elastic body to move clamping ring arm away from clamping slot. The valve body structure facilitates user to repair or replace hose, and greatly saves user's maintenance costs.

Abstract: A towel rack with multiple usage modes, comprising: first connecting rod; second connecting rod; pair of large skeletons, first upper rod of left side large skeleton and right side large skeleton connecting to first connecting rod by first, second rotation positioning member, respectively, pair of large skeletons and first connecting rod being in relative rotation state or locked state when pressing or releasing first button; pair of small skeletons, second upper rod of left side small skeleton connecting to first lower rod of left side large skeleton, and second upper rod of right side small skeleton connecting to first lower rod of right side large skeleton through third and fourth rotation positioning member, respectively, pair of small skeletons and large skeletons being in relative rotation state when pressing second button.