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1、 Insulator. An insulator, also known as a base or device board, is used to place the touch element in the desired orientation and distance, ensuring the insulation function between the touch element and the shell. Excellent insulation resistance, voltage resistance, and ease of processing are the basic requirements for selecting insulation materials for processing into insulators.

2、 Attachment. The attachments are divided into structural attachments and equipment attachments. Structural accessories such as snap rings, positioning keys, positioning pins, guide pins, connecting rings, fixtures, sealing rings, sealing gaskets, etc. Device accessories such as screws, nuts, screws, spring coils, etc. The attachments are mostly standard and universal parts.

3、 Touchpiece. The contact point is the central component of the SIM card holder that completes the electrical connection function. Usually, a contact pair is composed of male and female contacts, and electrical connections are completed by inserting the female and male contacts. The male contact is a rigid component, and its shape is cylindrical (circular pin), square cylindrical (square pin), or flat (insert). Male contacts are generally made of brass or phosphor bronze. The female contact, also known as the socket, is a key component of the contact pair. It relies on the elastic structure to undergo elastic deformation and generate elastic force when inserted into the plug, forming a tight contact with the male contact and completing the connection. There are many types of jack structures, including cylindrical (slotted, necked), tuning fork, cantilever beam (longitudinally slotted), folding (longitudinally slotted, 9-shaped), box (square jack), and hyperbolic spring jack.

4、 Shell. It provides mechanical maintenance for the built-in insulation device board and pins, and provides alignment when inserting plugs and sockets, and then fixes the SIM card holder on the device.

1、 The surface sugar content of parts has a significant impact on quality indicators such as porosity, appearance, and corrosion resistance. The lower the surface roughness, the smaller the porosity, and the better the appearance and corrosion resistance. On the contrary, the higher the surface roughness, the higher the porosity, and the poorer the appearance and corrosion resistance.

2、 If special measures are not taken before electroplating, defects such as spots, pits, scratches, and burrs on the surface of the SIM card holder cannot be eliminated during the electroplating process, which will directly affect the appearance quality of the part surface electroplating.

3、 Unless the surface roughness content of the SIM card holder has a special impact on the product's performance, the surface roughness of the SIM card holder should be minimized as much as possible, at least lower than the required surface roughness value after electroplating.