| 摘要 |
Disclosed is a whiteboard lifting device, which can be delivered with a minimal volume since the device comprises a minimum of parts, has an improved structure so as to facilitate the assembly thereof, and provides the convenience of being able to move vertically while maintaining a very stable horizontal state and being able to be easily stopped and released at a desired position. The present invention comprises: a whiteboard that can be raised and lowered vertically; a stand comprising a pair of upright posts provided at the sides of the stand while supporting the whiteboard such that the whiteboard can be raised and lowered, upper and lower horizontal posts, both ends of which are fixed to the upright posts, a ground support fixed at the lower ends of the upright posts, and casters mounted at the bottom of the ground support; board support parts for holding the whiteboard thereon; and a lifting part and a brake part, which move the whiteboard up and down and stop the same. The board support parts comprise: a pair of supporting parts with which the rear surface of the whiteboard, which can be raised and lowered, comes into contact, and a fixing part and a support part, which are coupled to the upper and lower sides of the supporting parts. The lifting part comprises: a pair of sliding blocks, which move by being respectively inserted into the pair of upright posts of the stand, and of which the vertical centers at one side are cut so as to form moving spaces; upper and lower fixing pieces, which have one end fixed to the outer sides of the upper and lower parts of the sliding blocks in the horizontal direction and the other end fixed to the supporting parts of the board support part; and a connecting bar for connecting the sliding blocks to one-another. The brake part comprises: a fixed ratchet gear, mounted in the vertical direction inside the pair of upright posts of the stand; a stopper, horizontally moving so as to be separated from or engage with the ratchet gear in an orthogonal state, and having a sawtoothed part formed at the front end thereof and an operating lever fixed at the rear end thereof; a guide block, guiding the stopper such that the stopper horizontally moves, and fixed to the inside of the lower end of the sliding block of the lifting part so as to vertically move together with the lifting part; and a spring, assisting the horizontal movement of the stopper, and providing an elastic force such that the sawtoothed part at the front end thereof engages with the ratchet gear when the stopper stops. The whiteboard is raised by allowing the bottom of the whiteboard to be artificially lifted in a state in which the whiteboard is mounted on the board support parts, or the whiteboard can be lowered by separating the sawtoothed part, at the front end of the stopper of the brake part, from the ratchet gear. |
