JPS6236220Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention particularly relates to a socket mounting device for mounting a socket for a crystal resonator on a printed wiring board.

Crystal resonators are used in the oscillation circuits of portable radio communication devices, etc., but in such cases, the crystal resonators are often mounted in a replaceable manner so that the frequency can be selected according to the customer's request. It's getting old.
For this reason, a socket for a crystal resonator is provided on the printed wiring board side, and the following types of sockets are known. That is, the device shown in FIG. 1 consists of a housing 1 made of synthetic resin and a female contact 3 having spring elasticity mounted in an opening 2 of the housing 1.
The female contact 3 is configured to be mounted on the board 5 by inserting the lead piece 4 of the female contact 3 protruding from below into the mounting hole 6 of the board 5. According to this socket, since the crystal resonator 7 is supported by the spring elasticity of the female contact 8, excessive stress is not applied to the male contact 8, but the housing 1 itself is Since it is placed on top, it becomes bulky and poses an obstacle to downsizing the device. Further, the lead piece 4 must be soldered to a predetermined wiring path on the back side of the board 5, and the workability is not good. On the other hand, in the socket shown in FIG. 2, socket pins 9 are embedded and fixed directly in the substrate 5. According to this, the mounting height of the crystal resonator 7 can be lowered, but since the socket pin 9 does not have enough room to tolerate the spacing error that occurs between the male contactor 8 and the male contactor 8. There is a risk that unnecessary stress will be added to 8. Especially in cold weld type packages, the male contact 8
The stress applied to the crystal oscillator may cause cracks in the surrounding resin, causing the gas sealed in the package to leak, causing the oscillation frequency of the crystal resonator to deviate from its original value.

Therefore, the object of this invention is to provide a socket mounting device with good workability that can reduce the mounting height of a socket with a female contact having spring elasticity to a printed wiring board. be.

Hereinafter, this invention will be described in detail based on embodiments shown in the accompanying drawings.

A socket 11 using this socket mounting device is shown in FIGS. 3-5. This socket 11 includes a housing 12 made of synthetic resin such as phenolic resin, and a plurality of female contacts 13, 13 (in this embodiment, a pair of left and right female contacts) mounted inside the housing 12. is provided with a flange 14 formed on its upper side and two openings 15 formed to receive female contacts 13, 13 from above. In this case, as shown in FIG. 6, each opening 15 is provided on the upper surface of the housing 12 corresponding to the lead piece 20 of the female contactor 13, which will be described later.
A recessed step 16 of a predetermined depth is provided extending from the upper edge toward the side wall of the housing 12, and an engaging portion is provided on both inner side walls of the opening 15 below the recessed step 16. Grooves 17, 17 are formed respectively. On the other hand, referring also to FIG. 7, the female contactor 13 includes a jack member 18 including a pair of elastic wings 19 bent downward at right angles, and a jack member 18 extending horizontally from the jack member 18. The lead piece 20 is integrally connected to the lead piece 20. A crystal oscillator 7 shown in FIG.
A guide hole 21 is bored through which the male contact 8 is inserted. The lower ends of each elastic wing piece 19, 19 are bent inwardly to constitute jack terminals 22, 22 having spring elasticity and formed to be able to elastically clamp the male contact 8. are doing. In addition, the elastic wing pieces 19, 19 have tongue pieces 23, 23 cut and raised outwardly and upwardly from the side wall portions thereof.
Each is equipped with Note that this female contact 13 can be integrally made by, for example, pressing a good conductor such as phosphor bronze or beryllium copper. Moreover, this female contactor 13 is
The jack member 18 includes a projecting piece 24 projecting from the tip thereof, and a narrow neck part 25 formed between the jack member 18 and the lead piece 20.

In this socket 11, a female contactor 1
3 is firmly fixed in the housing 12 by being forcibly press-fitted from above the opening 15. That is, along with this press-fitting operation, the tongue piece 2
3 and 23 are once pushed into the opening 15 while being deformed inwardly, but the upper side walls 26 and 26 of the opening 15
At the point when it crosses over, it elastically returns into the engaging grooves 17, 17, and acts as a detent inside thereof (see FIG. 5). On the other hand, the protruding piece 24 and the narrow neck portion 25 each abut on the concave stepped portion 16 (see FIG. 4). In this way, the stopper action of the projecting piece 24 and the narrow neck part 25 on the concave stepped part 16, and the tongue pieces 23, 23
Due to the detent action on the engagement grooves 17, 17, the female contact 13 is reliably locked within the opening 15 of the housing 12.

FIG. 8 shows the printed wiring board 28 of this socket 11.
The installation state is illustrated. A printed wiring board 28 to which this socket 11 is applied has a mounting hole 29 formed in a shape into which the housing 12 is fitted, and a wiring path 30 printed in a pattern corresponding to each lead piece 20, 20. 30 are formed in advance. This socket 11 is installed by inserting its housing 12 into the mounting hole 29. In this case, the flange 14 formed on the upper side of the housing 12 is inserted into the mounting hole 29.
It abuts on the peripheral edge of 9. Therefore, the thickness of the flange 14 becomes the apparent height of the socket 11 when viewed from the front side of the printed wiring board 28. Then, each lead piece 20, 20 corresponds to a wiring path 3.
0 and 30, respectively, and the socket 11 is fixed onto the printed wiring board 28 via these soldered parts.

In the above structure, the crystal resonator 7 is removably mounted on the socket 11 by inserting its male contacts 8, 8 into the guide holes 21, 21 of the jack members 18, 18. In this case, as mentioned above, the apparent height of the socket 11 is equal to the thickness of the flange 14, and by setting the thickness to preferably 1 mm or less, the mounting height of the crystal resonator 7 can be made considerably lower. This is advantageous for making portable wireless communication devices thinner and smaller.
Further, since the male contact 8 inserted through the through hole 21 is elastically held between the jack terminals 22, there is little risk of applying undue stress to it. Furthermore, in this embodiment, since the jack terminals 22, 22 are arranged parallel to the arrangement direction of the male contacts 8, 8,
Even the spacing error between the male contacts 8, 8 can be sufficiently tolerated. On the other hand, according to this socket mounting device, since the lead piece 20 of the jack member 18 is led out laterally from the side of the flange 14, the soldering work can be performed on the surface side of the printed wiring board 28, further improving work efficiency. It has the advantage of being able to be enhanced.

Although the above embodiment has been described as a socket for a crystal resonator, the present invention is not limited thereto and can of course be applied to other electronic components. Furthermore, by adding female contacts, it can be easily adapted to electronic components having two or more male contacts.

[Brief explanation of the drawing]

Figures 1 and 2 are sectional views showing the conventional example, Figure 3 is a plan view of the socket according to this invention, Figure 4 is a partial sectional view taken along the - line in Figure 3, and Figure 5. is an enlarged sectional view taken along the - line in FIG. 3, FIG. 6 is a plan view showing the housing of FIG. 3, and FIG. 7 is a perspective view of a female contact.
FIG. 8 is a developed perspective view for explaining the state of attachment to a printed wiring board. In the figure, 7 is a crystal resonator, 8 is a male contact, 1
1 is a socket, 12 is a housing, 13 is a female contact, 14 is a flange, 15 is an opening, 16 is a concave step, 17 is an engagement groove, 18 is a jack member, 19 is an elastic wing piece, and 20 is a lead piece. , 21 is a guide hole, 22 is a jack terminal, 28 is a printed wiring board,
29 is a mounting hole, and 30 is a wiring path.

Claims (1)

[Claims for Utility Model Registration] In a socket mounting device for mounting a socket applied to an electronic component such as a crystal resonator to a printed wiring board, the socket has a lead piece 20 extending laterally.
a female contact 13 having a
A housing 12 made of synthetic resin has an opening 15 into which the lead piece 3 can be inserted from above, and a flange 14 is formed on the upper side of the housing 12. A concave stepped portion 16 having a predetermined depth extending from the upper edge of the opening 15 toward the side wall of the housing 12 is provided at the portion, and the printed wiring board has a mounting hole 29 into which the housing 12 is appropriately fitted; forming a wiring path 30 corresponding to the lead piece 20;
The socket is mounted on the printed wiring board by bringing the flange 14 into contact with the peripheral edge of the mounting hole 29, and the lead piece 20 is soldered to the corresponding wiring path 30. Socket mounting device.