Button interacting with trapdoor

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I was making a chair that has trapdoors. I have a button that is supposed to power redstone behind a block but powers the trapdoor and the door of this chair. Tutorial:
I don't want that because always I press that button, I have to close the trapdoors manually.
Does anyone have any solutions?
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How do you make a button open a trapdoor in Minecraft?
Iron trapdoors can be opened only by redstone pulse. To place a trapdoor, use a trapdoor item while pointing at the block it should be attached to. Once it is placed, the attachment block can be removed without breaking the trapdoor.DONT Press the Trap Door Button.. *MYSTERY BUTTON BOX*
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Images: Eren Li, Ryutaro Tsukata, Tatiana Syrikova, Anete Lusina