Please select the most similar patent number from A, B, C and D. Which number is?
A support column array having a variable elastic modulus, and a vacuum glass. A first ring of support columns in the variable elastic modulus support column array close to a sealed edge of the vacuum glass comprises low-elastic modulus support columns. A second ring of support columns close to the sealed edge of the vacuum glass comprises high-elastic modulus support columns. In this manner, rings of low elastic modulus support columns and rings of high elastic modulus support columns are alternately arranged in a direction leading away from the sealed edge of the vacuum glass, until the support columns are all arranged. The vacuum glass is formed from the varying elastic modulus support column array and flat glass. The varying elastic modulus support column array reduces the maximum stress and the maximum deformation sustained by the vacuum glass, thereby reducing glass damage and missing support columns. The arrangement of the varying elastic modulus support columns can be applied without changing the original array spacing of support columns of existing products, or using the array spacing of support columns in novel designs.
A: An impact resistant vacuum glass, comprising a vacuum glass body. The vacuum glass body comprises a first glass substrate (1), a second glass substrate (2), a sealing material, and a support (3); the first glass substrate (1) and the second glass substrate (2) are arranged opposite to each other; the sealing material is provided at an edge position between the first glass substrate (1) and the second glass substrate (2); the first glass substrate (1), the second glass substrate (2) and the sealing material jointly enclose a vacuum chamber (4); the support (3) is provided within the vacuum chamber (4); a buffer material (6) is provided on the end face side of the periphery of the vacuum glass body and on the outside of at least one plate surface of the periphery of the vacuum glass body; a dynamic stress cancellation frame (7) is provided on the outer side of the buffer material (6), the dynamic stress cancellation frame (7) is capable of applying a adjustable preload force to the edge of the vacuum glass. The vacuum glass can significantly improve impact resistance performance.
B: An inclination adjustable liquid crystal module packing box for assembling a liquid crystal module (20) comprises a box body (10), a bearing rack (30) and a first supporting assembly, wherein the bearing rack (30) is used for bearing the liquid crystal module and is connected to the bottom surface (11) of the box body through the first supporting assembly; the first supporting assembly comprises at least one group of first adjusting mechanisms (40) connected to one side of the bearing rack (30) and have adjustable elasticity; each first adjusting mechanism (40) consists of a first supporting column (41), an elastic member (42) and a positioning element (43); and the first supporting column (41) is telescopically connected to the bottom surface (11) of the box body through the elastic member (42) and is also provided with an elastic buckle (44) matched with the positioning element (43) to realize graded lifting of the first supporting assembly. Through the angle of the bearing rack, a PCB (Printed Circuit Board) is kept at a lower position of the inclination; even if bumping occurs during transportation, the PCB does not bend upwards because of the gravity action per se so as not to cause wrinkling of a COF (Chip On Film) or cause conflict damage to glass by the PCB.
C: A novel outdoor leg press training device, comprising a support column (1), rotary shafts (2), chairs (3) and foot pedals (4), wherein the support column (1) is provided thereon with a plurality of tension springs (5) distributed along the height direction thereof, wherein different tension springs (5) have different elastic moduli; one end of the tension springs (5) is fixed to the support column (1), and the other end thereof is provided with a hook (6); the side surface of each rotary shaft (2) which is close to the support column (1) is provided with a hanging ring (7), and a hook (6) may be hung onto a hanging ring (7). The tension springs are added to an existing outdoor leg press training device, so that a trainee may select different tension springs to fix to the rotary shaft according to the strength condition of the trainee, thereby increasing or decreasing training difficulty. Therefore, highly-targeted leg press training may be achieved, and the user may achieve a better training effect.
D: Disclosed are a device for connecting a crossbeam (3) with an upright pillar of a bunk bed, and a bunk bed. The upright pillar comprises a supporting pillar (1) and a connecting pillar (2). An end part of the crossbeam (3) is provided with a connecting base (4); the connecting base (4) is provided with a vertically penetrated conical hole; a shaft sleeve (5) is movably arranged in the conical hole; an outer surface (5-1) of the shaft sleeve (5) and a side surface (4-1) of the conical hole form a pair of inclined surfaces matching each other. An end surface of the connecting pillar (2) is provided with a plurality of grooves (2-2), so that a plurality of elastic clamping jaws (2-1) are formed on an end part of a sidewall of the connecting pillar (2); one end of the supporting pillar (1) is inserted into the connecting pillar (2); the shaft sleeve (5) is sleeved on the connecting pillar (2); the connecting base (4) compresses the shaft sleeve (5) so that the two inclined surfaces (4-1), (5-1) are tightly pressed together, and the shaft sleeve (5) forces the elastic jaws (2-1) to bend inward to be deformed to tightly hold the supporting pillar (1). The connecting base (4) is utilized to compress the shaft sleeve (5) so that the two inclined surfaces (4-1), (5-1) are tightly pressed together, and the shaft sleeve (5) forces the elastic jaws (2-1) to bend inward to be deformed to tightly hold the supporting pillar (1); thereby, the connecting pillar (2), the supporting pillar (1) and the crossbeam (3) are firmly connected together, and disassembly and assembly are very quick and simple.
Answer: A