147results about How to "Easy and stable placement" patented technology

The invention discloses a conference show device. The conference show device comprises two lifting rods, the bottom ends of the lifting rods are fixedly connected with foot pads, the top ends of the two lifting rods are sleeved with a telescopic blackboard, cylindrical grooves are formed in the positions, close to the two sides, in the telescopic blackboard, the lifting rods are sleeved with the cylindrical grooves, a first telescopic rod is fixedly connected between the two lifting rods, two fixing plates are symmetrically fixed to the top of the telescopic blackboard, a second telescopic rodis fixedly connected between the two fixing plates, two limiting cylinders are symmetrically and fixedly arranged on the back of the telescopic blackboard, openings are symmetrically formed in the opposite sides of the two limiting cylinders, torsion springs are fixedly connected to the two upper and lower opposite inner walls of the limiting cylinders, the opposite ends of the two torsion springs are jointly and fixedly connected with rollers, and projection cloth is wound between the two rollers. The device is simple and reasonable in structural design, convenient to operate, capable of adjusting the height of a show plate, and adjusting the size of the telescopic blackboard and the projection cloth, and convenient to move.

The invention discloses an auxiliary device for ensuring safe demolding of mold stripping of a concrete product. The auxiliary device comprises a bearing frame, first reset springs, second reset springs and vertical shafts. A containing basket is mounted above the bearing frame. An opening is formed in the bottom of the containing basket. A first conical spring is mounted below the containing basket and located at the outer side of the opening. The vertical shafts are mounted at the upper end of the containing basket. Baffles are mounted on the vertical shafts. The baffles are connected with the containing basket through the vertical shafts. According to the auxiliary device for ensuring safe demolding of mold stripping of the concrete product, a mold filled with the concrete product is conveniently placed on the inner side of the containing basket, and first ejector rods and second ejector rods extend out of mounting sleeves and are in fit contact with the outer surface of the mold correspondingly under the pushing of the first reset springs and the second reset springs, so that the mold can be conveniently and stably placed, subsequent knocking vibration on the side wall of the mold is facilitated, and the demolding operation is finally completed.

The present invention is about a wireless keyboard for tablet PC, which is a kind of accessory that is necessary for using the tablet PC conveniently. The present invention combined the role of a case that protects the tablet PC to the wireless keyboard and ensured and made the attachment and detachment of it more convenient with magnet and all. When user intends to use it, he or she can easily assemble the built-in stand of the wireless keyboard and conveniently use it.

The invention relates to a placing shelf, in particular to a dustproof type electronic box placing shelf convenient to move, and aims to solve the technical problem of providing a dustproof type electronic bookshelf convenient to move, which can be convenient to move, can allow electronic boxes to be conveniently placed and stored, and has the effect of being dustproof. In order to solve the technical problem, the invention provides the dustproof type electronic bookshelf convenient to move. The dustproof type electronic bookshelf convenient to move comprises a bottom plate, universal wheels, a travelling mechanism, first placing plates, second placing plates and a dustproof mechanism, wherein the universal wheels are symmetrically arranged on the front side, the rear side, the left side and the right side of the bottom of the bottom plate; the travelling mechanism is arranged at the top of the bottom plate; the left side of the travelling mechanism is uniformly connected with the first placing plates; and the second placing plates are uniformly connected to the right side of the travelling mechanism. According to the dustproof type electronic box placing shelf disclosed by the invention, firstly, the travelling mechanism is arranged, so that the effect of conveniently and stably placing the electronic boxes can be achieved; and besides, the dustproof mechanism is arranged, so that the effect of being dustproof for the electronic boxes can be achieved.

The invention discloses an anti-collision storage rack for gear selling. The anti-collision storage rack comprises a base and a second transverse rod. Slide wheels are mounted at the bottom of the base. An oil groove is formed in the middle of the upper surface of the base. A support column is disposed at each of the two ends of the oil groove. A placing groove is formed in the middle of each support column. A standing column is arranged in each placing groove. The top ends of the two standing columns are connected through the second transverse rod. Gear seats are disposed on the upper surface of the second transverse rod. A first transverse rod is disposed at the bottom of the second transverse rod. Anti-collision devices are disposed at the bottom of the first transverse rod. Each anti-collision device comprises a vertical rod and a support column, the top of the vertical rod is connected with the first transverse rod, the support column is horizontally disposed on the lateral face of the bottom of the vertical rod, U-shaped grooves are formed in the support column, and a protective pad is disposed on the inner surface of each U-shaped groove. The anti-collision storage rack for gear selling has the advantages that gears can be stored conveniently and stably, the storing and taking of the gears are facilitated by the aid of the gear storage rack, and collision is avoided.

The invention discloses a double-wavelength testing device applicable to the judgment of firing delay time of a shock tube. The double-wavelength testing device is composed of two sets of photoelectric conversion mechanisms with the same structure, wherein each photoelectric conversion mechanism comprises an optical fiber connector, a narrow band pass filter, a band pass filter, a photoelectric multiplier tube and an operational amplifying circuit; after compound light is introduced into the testing device, the light is filtered through the narrow band pass filters to form monochromatic light; when the monochromatic light penetrates through the band pass filters, stray light is further filtered; the filtered monochromatic light enters the photoelectric multiplier tubes and an optical signal is converted into an electric signal; and then the electric signal is processed by the operational amplifying circuits and is led out of the double-wavelength testing device. Each narrow band pass filter in the double-wavelength testing device comprises two sheets of filters with different central wavelengths and are changeable, and the measurement requirements on the concentration of OH or CH* atom radicals at different positions of the shock tube or the concentration of different atom radicals at the same position can be met; and the double-wavelength testing device is simple in structure, convenient to operate, low in manufacturing cost, convenient and firm to mount, good in light shielding performance and accurate and reliable in testing result.