CN2838146Y

CN2838146Y - Earthing device for externally inserted exposed crystal

Info

Publication number: CN2838146Y
Application number: CN 200520059789
Authority: CN
Inventors: 梁钟铭
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-17
Filing date: 2005-06-17
Publication date: 2006-11-15
Anticipated expiration: 2015-06-17

Abstract

The utility model provides an earthing device for externally inserted exposed crystals, which comprises a casing of an electric appliance, a crystal socket and a printed circuit board, wherein the crystal socket is arranged in the casing; the printed circuit board is provided with an earth pole; the earth pole is connected to the ground through a conducting wire; the earth pole of the printed circuit board is also provided with at least one metal contact piece which can be in contact with a crystal metal casing which is inserted into the crystal socket to make the crystal metal casing be electrically communicated with the electrical property of the earth pole of the printed circuit board. Due to the adoption of the metal contact piece which is in contact with the exposed crystal metal casing and is electrically communicated with the electrical property of the common earth pole of a circuit, voltage or static electricity contacted with the crystal metal casing can be conducted into the earth pole and eliminated immediately, so the utility model ensures the stability of crystal operation and protect crystals against damage. The utility model can be widely suitable for the manufacturing of electronic devices which are provided with the externally inserted exposed crystals.

Description

A kind of earthing device of outside plug type non-packed crystal

Technical field

The utility model relates to a kind of electronic device, is specifically related to a kind of earthing device of outside plug type non-packed crystal, belongs to electronic technology field.

Background technology

Electronic device of the prior art (abbreviation electrical equipment) often needs to use crystal element; Crystal element refers generally to quartz resonator and crystal filter, abbreviates crystal as, and its principle is to utilize quartzy piezoelectric effect and inverse piezoelectric effect to realize the key components that FREQUENCY CONTROL, stabilized frequency and frequency are selected, and has very high frequency stability.Press packing forms, the quartz crystal components and parts can be divided into two kinds on wire type and SMD type again.The crystal of wire type generally is a non-packed, promptly especially again insulation crust is not set, and also claims the non-packed crystal, and its structure comprises body and pin as shown in Figure 1, and pin is parallel to stretch out in outside the body, and the surface of body coats the layer of metal shell; Therefore plant crystal and can directly insert or extract the socket of electronic device from the outside, so be also referred to as outside plug type non-packed crystal for the outside exposure of its reservation.

Quartz crystal is the very high device of a kind of stability, but is the very high device of sensitiveness, as long as can both make frequency change when wafer surface has some dusts or ambient environmental conditions to change slightly.The variations in temperature of quartz crystal, frequency also changes; In addition, when a large amount of static of enrichment on the metal shell of crystal or contact high voltage, cause internal structure to be damaged easily.Present electronic device is not found to be this outside plug type non-packed crystal as yet earth protective device is provided, and can not satisfy the needs of its job stability and fail safe.

The utility model content

The purpose of this utility model is, at the existing above-mentioned deficiency of existing electronic device, provides a kind of earthing device that ground protection is provided for this outside plug type non-packed crystal.

Technical scheme provided by the utility model is: a kind of earthing device of outside plug type non-packed crystal, comprise casing for electric appliances and be arranged on the crystal socket and the printed circuit board (PCB) of enclosure interior, circuit board is provided with the earth polar, the earth polar is through lead ground connection, it is characterized in that, on the earth polar of described circuit board, at least also be provided with the metal contact that a slice can contact, make crystalline metal housing and circuit board earth polar to electrically conduct with the crystalline metal housing of insertion crystal socket.

Described metal contact is the elastic metallic member, and its lower end is to overlap, peg graft or be welded on the earth polar of printed circuit board (PCB); Described metal contact is strip or sheet metal member, and its upper end can be overlapped on the crystalline metal housing; The upper end of described metal contact can also be provided with the one section bending that is used for overlapping on the crystalline metal housing.

Described crystal is quartz resonator or crystal filter; Can also be other grafting electronic components similar to the non-packed crystal structure.

Described casing for electric appliances is two halfbodies up and down that fasten mutually, is respectively upper casing and lower casing.

Advantage of the present utility model is: owing to adopted the metal contact that contacts with non-packed crystalline metal housing and electrically conduct with the public earth polar of circuit; voltage or static that the crystalline metal shell is contacted; all can import the earth polar immediately eliminates; thereby guarantee the stability of crystal work, and the protection crystal is without prejudice.

The utility model can be widely used in being provided with the manufacturing of the electronic device of outside plug type non-packed crystal.

Description of drawings

Fig. 1 is the perspective view of prior art crystal.

Fig. 2 is the utility model embodiment perspective view.

Fig. 3 is the cutaway view of A-A among Fig. 2.

Fig. 4 is the utility model embodiment assembly structure schematic diagram.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further specified.

Embodiment provides a kind of earthing device of outside plug type non-packed crystal of electronic romote-controller.

As shown in Figure 1, crystal 1 of the prior art, comprise body 2 and from the body 2 two parallel pins that stretch out 4, the outer surface of body 2 is coated with metal shell 3.

As Fig. 2-shown in Figure 4, a kind of earthing device of outside plug type non-packed crystal of electronic romote-controller 5, comprise remote controller housing 6 and be arranged on the crystal socket 7 and the printed circuit board (PCB) 8 of this enclosure interior, circuit board is provided with earth polar 9, earth polar 9 is through lead 11 ground connection, on the earth polar 9 of described circuit board 8, be provided with the metal contact 10 that a slice can contact, make crystalline metal housing 3 and circuit board earth polar 8 to electrically conduct with the crystalline metal housing 3 of insertion crystal socket 7.

Described metal contact 10 is elasticity copper members, and its lower end is directly to be welded on the earth polar 9 of printed circuit board (PCB) 8; Described metal contact is a flat member, and its upper end can be overlapped on the crystalline metal housing 3; The upper end of described metal contact 10 can also be provided with the one section bending 12 that is used for overlapping on the crystalline metal housing.

Described crystal 1 is a quartz resonator, and its concussion frequency shell is selected according to actual needs.

Described casing for electric appliances 6 is two halfbodies up and down that fasten mutually, is respectively upper casing 6a and lower casing 6b.

Method as above-mentioned embodiment, can also produce the earthing device of the outside plug type non-packed crystal that possesses one of following technical characterictic: described metal contact, being other hardwares beyond the copper, also can be strip component, and its lower end can be that overlap joint or pin are on the circuit board earth polar; Described crystal can be a crystal filter, also can be other grafting electronic components similar to the non-packed crystal structure.

Claims

1, a kind of earthing device of outside plug type non-packed crystal, comprise casing for electric appliances and be arranged on the crystal socket and the printed circuit board (PCB) of enclosure interior, circuit board is provided with the earth polar, the earth polar is through lead ground connection, it is characterized in that, on the earth polar of described circuit board, at least also be provided with the metal contact that a slice can contact, make crystalline metal housing and circuit board earth polar to electrically conduct with the crystalline metal housing of insertion crystal socket.

2, earthing device according to claim 1 is characterized in that, described metal contact is the elastic metallic member, and its lower end is to be connected on the earth polar of printed circuit board (PCB).

3, earthing device according to claim 1 and 2 is characterized in that, described metal contact is strip or sheet metal member, and its upper end can be overlapped on the crystalline metal housing.

4, earthing device according to claim 3 is characterized in that, the upper end of described metal contact can also be provided with the one section bending that is used for overlapping on the crystalline metal housing.

5, outside plug type quartz crystal device according to claim 1 and 2 is characterized in that, described crystal is quartz resonator or crystal filter.

6, outside plug type quartz crystal device according to claim 5 is characterized in that, described crystal can also be other grafting electronic components similar to the non-packed crystal structure.

7, outside plug type quartz crystal device according to claim 1 is characterized in that, described casing for electric appliances is two halfbodies up and down that fasten mutually.