CN207819059U - The ESD circuit safeguard structure of deck - Google Patents

Abstract

The utility model provides a kind of ESD circuit safeguard structure of deck, including deck and ESD protection device, and the deck includes at least one pin, and the pin is connected to ground by ESD protection device.The beneficial effects of the utility model are：Using the structural defence pin of deck, reduces the usage quantity of ESD device, save PCB space, reduce design cost and production cost.

Description

The ESD circuit safeguard structure of deck

Technical field

The utility model is related to ESD protection fields, refer in particular to a kind of ESD circuit safeguard structure of deck.

Background technology

Although the structure of early stage SIM card holder also has the metal frame shell of ground connection, the signal pin of SIM card/TF card to exist User changes during SIM card/TF card, is touched by the hand of user, if human body just carries electrostatic, easily discharges pin Cause the damage of relevant device, therefore each pin of deck of early stage is provided with ESD protection device.But with the hair of technology Exhibition, the size of SIM card is smaller and smaller, while the metal frame housing design of deck is more and more perfect, and a large amount of pins originally are exposed The case where be not present, such as cross and ESD protection device still be set by original circuit design, both increased protection costs, The space of pcb board is occupied again.

Utility model content

Technical problem to be solved in the utility model is：A kind of ESD electricity of the deck of simple in structure and low in cost is provided Road safeguard structure.

In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of ESD circuit protection of deck Structure, including deck and ESD protection device, the deck include at least one pin, the pin by ESD protection device with Ground connects.

Further, the pin is electrically connected with Sensitive Apparatus.

Further, the ESD protection device is TVS pipe.

Further, the deck is TF card deck.

Further, the deck is SIM card deck.

Further, the deck is all-in-one card deck.

The beneficial effects of the utility model are：Using the structural defence pin of deck, reduce the use number of ESD device Amount, saves PCB space, reduces design cost and production cost.

Description of the drawings

The concrete structure of the utility model is described in detail below in conjunction with the accompanying drawings：

Fig. 1 is the cartridge structure schematic diagram of the utility model；

Fig. 2 is the card seat circuit application principle figure of the utility model；

1- shells；2- deck ontologies；The first pins of 3-；4- second pins.

Specific implementation mode

For the technology contents of the utility model, construction feature, the objects and the effects are described in detail, below in conjunction with implementation Mode simultaneously coordinates attached drawing to be explained in detail.

Embodiment

It please refers to Fig.1 and Fig. 2, a kind of ESD circuit safeguard structure of deck, including SIM, nanoSIM and a TF tri- is closed One deck and TVS pipe for ESD protection, the deck include can antistatic shell 1 and deck ontology 2, deck ontology 2 On be provided at least one pin, the part of the pin or pin is set to the position that the outer side is easily touched by user It sets, is connected with the TVS pipe for ESD protection over the ground on the line of the pin and Sensitive Apparatus.

Further, if the pin is connect with ground wire (GND), connection TVS pipe is not had to.

Further, suitable for the various decks that can touch pin equipped with exposed pins or user, as SIM card deck, MicroSIM cards deck, NanoSIM cards deck, TF card deck, SD card deck or various combination decks.

As can be seen from the above description, the beneficial effects of the utility model are：Using the structural defence pin of deck, reduce The usage quantity of ESD device, saves PCB space, reduces design cost and production cost.

Implement example

Referring to Fig. 2, three-in-one deck includes the first exposed pin 3 and exposed second pin 4, other pins By the protection of shell 1, wherein the first pin 3 is connect with GND, second pin 4 is connect with VCC-SIM2, therefore in second pin 4 A TVS pipe is connected over the ground, for protecting VCC-SIM2, you can the ESD protecting effects for reaching deck save ESD device It uses, greatly reduces entreprise cost.

The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in Other related technical areas are equally included in the patent within the scope of the utility model.

Claims (6)

1. a kind of ESD circuit safeguard structure of deck, it is characterised in that：Including deck and ESD protection device, the deck includes At least one pin, the pin are connected to ground by ESD protection device.

2. the ESD circuit safeguard structure of deck as described in claim 1, it is characterised in that：The pin has electricity with Sensitive Apparatus Connection.

3. the ESD circuit safeguard structure of deck as claimed in claim 2, it is characterised in that：The ESD protection device is TVS pipe.

4. the ESD circuit safeguard structure of deck as described in claim 1-3 any one, it is characterised in that：The deck is TF Card deck.

5. the ESD circuit safeguard structure of deck as described in claim 1-3 any one, it is characterised in that：The deck is SIM Card deck.

6. the ESD circuit safeguard structure of deck as described in claim 1-3 any one, it is characterised in that：The deck is more Unify card deck.