JPH0577887U - IC socket that can store electric elements - Google Patents

Abstract

(57) [Abstract] [Purpose] The electric element is housed together with the IC of the IC socket to shorten the wiring between the IC and the electric element and to increase the mounting density of the printed circuit board. [Structure] A window 22 is formed in an IC socket to insert an electric element from the outside. In the window 22, two elastic pieces 24a,
A conductive elastic member 24 constituted by 24b is provided. The elastic piece 24a is formed integrally with the conductive contact piece 28. The elastic piece 224b is formed integrally with the pin 26. When the electric element is inserted into the IC socket from the outside, the elastic pieces 24a and 24b are separated from each other and the electric element is sandwiched and fixed by the elasticity.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of an IC (integrated circuit) socket.

[0002]

[Prior Art]

 FIG. 8 is a diagram for explaining the conventional technique and shows a printed wiring state on a printed circuit board. In FIG. 8, through holes 1 to 14 are pin insertion holes formed on a printed board for mounting an IC socket having 14 pins. The through hole 7 is connected to the ground pattern GND, and the through hole 14 is connected to the power supply pattern Vcc. A capacitor C for removing noise included in the power supply voltage is connected between the pattern Vcc and GND. Further, the through holes 10 to 13 correspond to the signal output from the IC mounted in the IC socket, and resistors R for removing noise included in the output signal are connected to the through holes 10 to 13, respectively.

[0003]

[Problems to be solved by the device]

 For the purpose of using them, it is desirable to mount the capacitor C and the resistor R as close to the IC pins as possible, but in FIG. 8, for example, the capacitor C is close to the ground through hole 7, but It becomes far from the power supply through hole 14 and the noise removal efficiency decreases. Further, since the printed wiring pattern connecting the power supply through hole 14 and the capacitor C is long, this serves as an antenna, and electromagnetic waves are radiated from this to cause new noise generation.

Further, since the resistor R is also arranged on the printed wiring pattern drawn out from the through hole 13, for example, the resistor R is used for signal output of the IC by the length of the pattern from the through hole 13 to the resistor R. It becomes far from the pin and the noise removal efficiency decreases.

Further, since the capacitor C and the resistor R are arranged around the IC socket, an area on the printed circuit board correspondingly is required, and the mounting density is reduced.

Therefore, an object of the present invention is to improve the noise removal efficiency of a capacitor or a resistor in an IC socket and prevent the reduction of the mounting density.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is an IC socket for mounting an integrated circuit (IC) on a printed circuit board, wherein a pin insertion hole for inserting an IC pin is formed, and the IC pin is formed on the printed circuit board. An IC socket provided with mounting pins to be electrically connected includes a pair of electrically conductive members that can be electrically connected to each other and an insertion hole into which an electric element can be inserted from the outside. One of the members is electrically connected to the IC pin when the IC is inserted into the IC socket, and the other of the pair of conductive members is always electrically connected to the mounting pin. An electric element inserted into the IC socket via a hole is interposed between the pair of conductive members so as to be electrically connectable to the member, and the IC pin and the mounting pin via the electric element are provided. Electricity Is to provide an IC socket is characterized in that the road is formed.

The electric element inserted into this IC socket is, for example, a chip resistor for removing noise. Furthermore, a capacitor for noise removal can be installed in advance in this IC socket.

[0009]

[Action]

 According to the present invention, an electric element (for example, a noise removing resistor) is inserted through an electric element insertion hole formed in an IC socket, and the electric element is provided between a pair of conductive connecting members provided inside the insertion hole. Is fixed. As a result, an electric path is formed between the IC and the printed circuit board through the electric element.

[0010]

【Example】

 A first embodiment of the IC socket of the present invention will be described in detail with reference to FIGS. In FIG. 1, a pin insertion hole 20 for inserting an IC pin is provided on the upper surface of the IC socket. A window 22 for inserting an electric element such as a chip resistor is provided on the side surface of the IC socket, and a conductive elastic member 24 for sandwiching and fixing the electric element is provided inside the window 22. There is. Although not shown in the figure, the window 22 and the elastic member 24 are also provided on the opposite side surface of the IC socket. On the lower surface of the IC socket, the IC socket is mounted on the printed circuit board 32 shown in FIG. A female pin 26 is provided.

As shown in FIG. 2, the elastic member 24 is composed of two elastic pieces 24 a and 24 b, and one elastic piece 24 a has an IC inside the pin insertion hole 1 when the IC is mounted in the IC socket. It is integrally formed with a conductive contact piece 28 which comes into contact with the pin 34 and is electrically connected thereto. The other elastic piece 24b is formed integrally with the pin 26. The elastic pieces 24a, 24b are in contact with each other to form an electric path between the IC and the printed board 32. The pins 26 are soldered to the printed circuit board 32 by the solder 30.

Here, when an electric element such as the chip resistor Ra is inserted into the window 22 from the direction shown by the arrow, the elastic pieces 24a and 24b are separated as shown in FIG. 3, and the chip resistor Ra is sandwiched and fixed by elasticity. Then, an electric path between the IC and the printed circuit board 32 via the chip resistor Ra is formed.

When the chip resistor Ra is removed, elasticity causes the elastic pieces 24a and 24b to return to their original state and come into contact with each other.

Next, a second embodiment of the IC socket of the present invention will be described in detail with reference to FIGS. 4 to 6, the same components as those of the IC socket of the present invention described with reference to FIGS. 1 to 3 are designated by the same reference numerals.

In FIG. 4, instead of the window 22 shown in FIG. 1, a lead terminal insertion hole 36 for inserting an electric element such as a resistor having a lead terminal is formed on the side surface of the IC socket. ..

In FIG. 5, an elastic member 40 is provided in the hollow chamber portion 38 connected to the lead terminal insertion hole 36. The elastic member 40 is composed of two elastic pieces 40a and 40b each having an insertion hole 42 formed therein. One elastic piece 40a is inside the pin insertion hole 20 when the IC is mounted on the IC socket. Is formed integrally with a conductive contact piece 28 which is brought into contact with the IC pin 34 and electrically connected thereto. The other elastic piece 40b is formed integrally with the pin 26. The elastic pieces 40a, 40b are in contact with each other to form an electric / electric path between the IC and the printed board 32.

When the resistor Rb is inserted into the lead terminal insertion hole 36 from the direction shown by the arrow, when the lead terminal of the resistor Rb penetrates the insertion holes 42 of the elastic pieces 40a and 40b as shown in FIG. The elastic pieces 40a and 40b are separated from each other, and the resistance Rb is fixed by elasticity. Then, an electric path between the IC and the printed circuit board 32 via the resistor Rb is formed.

When the resistor Rb is removed, the elastic pieces 40a and 40b return to their original state due to elasticity and come into contact with each other.

Next, a third embodiment of the IC socket of the present invention will be described in detail with reference to FIG. FIG. 7 shows a capacitor formed in the IC socket of the first embodiment described with reference to FIGS. Each of the capacitors is formed in a strip shape, and of the pins 26 of the IC socket, the metal plate 44 connected to the power supply pin and the metal plate 46 connected to the ground pin overlap each other. It constitutes a capacitor. When the IC is energized, electric charges are accumulated between the overlapping metal plates 44 and 46 to function as a capacitor.

The capacitor may be formed as described above in the IC socket of the second embodiment described with reference to FIGS.

[0021]

【The invention's effect】

 As described above, according to the IC socket of the present invention, electric elements such as resistors and capacitors can be mounted in the IC socket, so that the IC and those electric elements can be connected in the shortest distance. Therefore, if those electric elements are for removing noise included in the power supply voltage supplied to the IC or the output signal output from the IC, the noise removal efficiency is improved. Furthermore, there is an advantage that the mounting density is increased because the space for mounting those electric elements on the printed circuit board is small.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an IC socket according to the present invention.

FIG. 2 is a sectional view of the IC socket shown in FIG.

3 is a sectional view illustrating a mechanism according to the present invention at an end portion of the IC socket shown in FIG.

FIG. 4 is a perspective view showing a second embodiment of an IC socket according to the present invention.

5 is a cross-sectional view of the IC socket shown in FIG.

6 is a sectional view illustrating a mechanism according to the present invention at an end portion of the IC socket shown in FIG.

FIG. 7 is a sectional view showing a third embodiment of an IC socket according to the present invention.

FIG. 8 is a plan view illustrating a conventional technique.

[Explanation of symbols]

 20 pin insertion hole 22 window 24 elastic member 24a elastic piece 24b elastic piece 26 pin 28 contact piece 30 solder 32 printed circuit board 34 IC pin 36 lead terminal insertion hole 38 hollow chamber 40 elastic member 40 elastic piece 40 elastic piece 42 insertion hole 44 Metal plate 46 Metal plate R resistance Ra resistance Rb resistance C capacitor

Claims (4)

[Scope of utility model registration request] 1. An IC socket for mounting an integrated circuit (IC) on a printed circuit board, wherein a pin insertion hole for inserting an IC pin is formed, and the IC pin is electrically connected to the printed circuit board. An IC socket including a pin for use has a pair of conductive members electrically connectable to each other and an insertion hole into which an electric element can be inserted from the outside, and one of the pair of conductive members is the IC Is electrically connected to the IC pin when inserted into the IC socket, the other of the pair of conductive members is always electrically connected to the mounting pin, and is inserted into the IC socket through the insertion hole. The electric element is interposed between the pair of conductive members so as to be electrically connectable to the member, and an electric path between the IC pin and the mounting pin via the electric element is formed. IC socket. 2. The pair of conductive members each include a conductive contact piece having elasticity, and when the electric element is not inserted into the IC socket, the contact pieces are elastically brought into contact with each other, and the electric element is When inserted into the IC socket, an electrical connection portion of the electric element to the outside is interposed between the contact pieces and is brought into contact with the contact pieces due to the elasticity, and is mounted on the IC pin via the electric element. The IC socket according to claim 1, wherein an electric path to the pin for use is formed. 3. The conductive contact piece is formed with an insertion hole into which a lead terminal, which is an electrical connection portion with the outside of the electric element, is inserted, and the electric element is not inserted into the IC socket. At this time, the contact pieces are brought into contact with each other due to elasticity, and when the electric element is inserted into the IC socket, the lead terminal of the electric element is inserted into the insertion hole of the conductive contact piece so that the contact piece is 3. The IC socket according to claim 2, wherein an electric path between the IC pin and the mounting pin that is separated from each other is formed via the electric element. 4. The IC socket comprises at least two metal plates electrically connected to the mounting pins,
2. The IC socket according to claim 1, wherein the metal plates are arranged so as to face each other so that charges are accumulated between the metal plates when electricity is applied to the metal plates.