44results about How to "The contrast effect is obvious" patented technology

The invention relates to a package for goods having a bar-code (2) and a temperature indicator (3) including a contrast medium between a front wall and a base wall. According to the invention, the temperature indicator (3) is placed beside the bar-code (2) in close vicinity of an outer code bar (4) thereof without covering the bar-code, in order to, on one hand, in a first temperature state without hindrance enable scanning of the bar-code, but, on the other hand, after a colour alteration in the contrast medium make scanning impossible, more precisely by making an outer neutral field (5) opaque.

The invention discloses a manufacturing method of a platinum bar and a platinum bar mould-pressing device. The manufacturing method of the platinum bar comprises the following steps of: preparing materials: preparing blank materials according to a corresponding style of the platinum bar; carrying out surface treatment: immersing the blank materials into acid to remove impurities on the surfaces of the blank materials; polishing: utilizing a polishing machine provided with a cloth wheel to polish the blank materials; spraying sand: uniformly carrying out sand spraying treatment on front and rear surfaces of the blank materials; continuously and repeatedly carrying out first-annealing and second-oil-pressing for six times, wherein the annealing temperature is 950 DEG C; parameters of a mould cavity correspond to those of the blank materials; buffing: buffing six faces of the platinum bar by a flying disc of a buffing machine to remove surplus burrs, respectively; electroplating platinum bar: immersing the platinum bar after the buffing treatment into rhodium solution to carry out electroplating on the surface of the platinum bar; and checking: carrying out qualification checking on an electroplated platinum bar product. The platinum bar manufactured by the manufacturing method, provided by the invention, has the advantages of flat character fonts, qualified weight, uniform line, complete and beautiful sanded surface, uniform and smooth and mutually-vertical frames, and obvious comparison effect as a whole.

The invention discloses a surface of revolution demonstration teaching tool, and mainly relates to the analytic geometry teaching tool field. The teaching tool comprises a base, a torsional rotating mechanism, and a busbar mechanism. The torsional rotating mechanism comprises a lower rotating shaft, a lower connecting rod, an upper rotating shaft, an upper connecting rod, and a control rod. The lower rotating shaft is rotatably disposed on the base, and the lower rotating shaft is driven by a motor disposed in the base. The lower end of the control rod and the lower rotating shaft are fixedly limited by two positions in an axial direction, and an included angle between the two positions is in a range from 20degrees to 80degrees, and the control rod penetrates the upper rotating shaft, and is synchronized with the upper rotating shaft in the axial direction. The upper rotating shaft is vertically connected with the upper connecting rod, and the lower rotating shaft is vertically connected with the lower connecting rod, and in addition, the busbar mechanism is detachably and fixedly disposed between the upper connecting rod and the lower connecting rod. The surface of revolution demonstration teaching tool is advantageous in that students can observe the forming process of the surface of revolution, and the students can compare a meridian line with the busbar conveniently, clearly, and visually, and therefore the students can understand and master related knowledge points quickly.

The invention relates to a simulation alarm device and particularly discloses a motorcycle safety helmet alarm experience device, belonging to the road traffic safety technology field. The motorcycle safety helmet alarm experience device comprises a control cabinet, a guide rail sliding block device, a traction device, an impact test model, a display device and an impact object device. The left end and the right end of the guide rail are supported and connected through a left end guide rail support and a right end guide rail support; the guide rail is connected to the sliding block in a sliding manner; the sliding block is connected to a substrate through a rotation joint; the rotation joint can rotate by surrounding the normal on the upper end surface of the sliding block; an impact test model is fixed on the substrate; the lower end of the sliding block is provided with a traction device; and the traction device is used for driving the sliding block on the guide rail and the impact test model fixed on the sliding block to move. The invention has the impact simulation functions for multiple combination states like the different speed, different angle and the facts whether the helmet is worn. The impact process is scientific and the comparison effect is obvious, which improves the alarm education effect of the device.