JP4526031B2 - IC socket - Google Patents

Description

  The present invention relates to an IC socket in which a surface-mounted IC can be detachably attached.

  Conventionally, in order to detachably attach a surface mount IC to the surface of a substrate, it has been attached via a socket attached to the substrate by soldering or the like. For example, in Patent Document 1, a socket base is fixed to a predetermined position of a substrate to which a surface mount IC is attached, and the surface mount IC is attached to the base. As for the mounting method, each contact spring is fitted in each groove portion of the base, the lead is fitted in the groove portion of the base so that the IC lead is not displaced, the lead is placed on the contact spring, and the holding frame Thus, the IC is fitted into the socket so as to surround the surface mount IC. As a result, the lead of the IC reliably contacts and is fixed to the contact spring of the groove provided on the base of the socket.

  Further, Patent Document 2 discloses that a surface mount IC is placed on a socket attached to the surface of a substrate, and a handle provided on the end of the socket is pulled to slide a slide provided on the socket. A structure in which the lower end portion of the lead of the mounting IC is pressed and fixed to the terminal of the socket is disclosed.

  Further, in Patent Document 3, a surface mount type electronic component is placed on a socket attached on a substrate, and a lid is fitted and fixed to a protruding portion protruding from a pedestal portion so as to press each lead portion. The structure to be disclosed is disclosed.

In addition, it is known that the contact provided on the socket is formed in a U shape, and the lower end portion of the lead of the surface mount IC is sandwiched between the U-shaped contacts. In this case, the lead slides on the contact surface during insertion and scrapes off the oxide film and dirt, so that high contact reliability is obtained, a cover for holding the surface mount IC is unnecessary, and vibration resistance and impact resistance are achieved. It's expensive.
Japanese Patent Laid-Open No. 5-3064 JP-A-6-140116 JP 2003-123920 A

  However, in the case of the above conventional technique, in order to remove the surface mount IC mounted and fixed on the IC socket attached on the substrate, delicate load adjustment is necessary using a dedicated jig for removal, There was a problem that workability was not good. For example, in the structures disclosed in Patent Documents 1 and 3, since the frame-type cover is fitted on the claw of the socket, the cover is removed using a jig or the like, and then the IC placed on the socket is removed. It was a thing. In addition, in the socket disclosed in Patent Document 2, when the surface mount IC is placed, the slide portion is slid and fixed while pressing the upper surface of the lead of the IC. There was still a possibility of stress. Furthermore, in order to operate the grip portion of the slide portion of the small socket, it is only possible to work with a tool having a tip of a nail or a fine end, and workability is not good.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide an IC socket that has a small operation load for fixing an IC and that can easily attach and detach a surface mount IC. To do.

The present invention provides an IC socket to which a surface mount type IC is detachably mounted, and the housing of the housing is formed so that the IC can be mounted on the lead terminal of the IC. A plurality of grooves provided on the inner side of the side wall, a storage groove formed on a side surface of the housing in communication with the groove, and the lead terminals are provided in each groove so as to be in contact with each other. The IC socket includes a plurality of contacts for surface mounting and a lever that is locked to the housing and holds the lead terminals in contact with the contact surfaces.

The lever is provided at both ends thereof with mounting arm portions that fit into fitting grooves formed on the outside of the side wall perpendicular to the side wall on which the housing groove of the housing is provided, and the lead terminal as the contact An engaging portion formed so as to be sandwiched between the lever and the lever is provided to be slidable from the outside with respect to the housing groove of the housing, and the lever is provided in the fitting groove. The mounting arm portion is slidably engaged. With the lever slid into the housing, the lever swings and the engaging portion presses the lead terminal to contact the contact. It is pressed against the contact part .

The lever is formed in a U shape with the mounting arm portions provided at both ends of the lever. Further, on the outer surface of the mounting arm of the lever is shall have knob protrusions are formed.

  According to the IC socket of the present invention, it is possible to easily attach and detach a surface mount type IC by using a pair of operating levers. Also, the work efficiency of the attaching / detaching work is good, and the lever engaging part holds the lead end part of the surface mount type electronic component by the sliding operation with respect to the contact inserted in the housing, so that the operation part and the jig A large load is not applied to the tool or the like, and the IC lead terminal can be securely attached and fixed with a light force.

  Hereinafter, an embodiment of an IC socket according to the present invention will be described with reference to FIGS. The IC socket 10 according to this embodiment is a surface-mountable IC 12 that can be detachably mounted on a circuit board. As shown in FIG. 1, the IC socket 10 is formed in a flat rectangular parallelepiped hollow frame shape. The upper surface of the central part of the short side is provided with a housing 14 made of resin or the like formed in a curved and recessed state. On both outer sides of the long side of the housing 14, there are formed receiving grooves 16 each having a substantially U-shape with a cross section orthogonal to the longitudinal direction opening outward. As shown in FIG. 2A, a latching protrusion 18 is provided in the vicinity of the corner above the longitudinal end of each storage groove 16. A pair of fitting grooves 20 are formed on the outer walls of both short sides of the housing 14 so as to communicate with the receiving grooves 16 formed on both long sides, respectively, and to be slightly diverged inward from both ends of the short side. It has been.

  As shown in FIG. 2B, the side walls of both long sides of the inner hollow portion of the housing 14 are partitioned slightly wider than the width between the connection end portions 22a of the lead terminals 22 extending on both sides of the IC 12. A plurality of groove portions 24 are provided at equal intervals or more than the number of lead terminals 22. Further, the partition 26 forming the groove portion 24 is inclined upward from the outside of the housing 14 to the inside. As shown in FIG. 1, the bottom side of the groove portion 24 is connected to an engagement groove 28 formed in a concave groove shape on the bottom surface of the housing 14. As shown in FIG. 2A and the like, the engagement groove 28 communicates with the bottom surface side of the storage groove 16 formed on the side surface of the housing 14, and a side surface opening 28 a is formed on the side surface. Each engagement groove 28 is provided with a contact 30 having a plurality of strip-shaped metal plates formed into a substantially U shape by bending and having elasticity.

  The substantially U-shaped bent portion of the contact 30 is inserted into the engagement groove 28, and one side of the bent contact 30 is slightly bent and protrudes from the side opening 28a. One end 30a of the contact 30 protruding from the side opening 28a is bent so as to be in contact with a contact point of a circuit board (not shown), and the back surface of the end 30a is formed to be flush with the housing bottom surface 14a. Further, on the other side of the bent contact 30, a contact portion 30b curved so as to rise slightly from the communicating portion of the engagement groove 28 and the storage groove 16 into the storage groove 16 is formed. Is bent downward on the side of the storage groove 16. As shown in FIG. 2A, the bent tip 30c is elastically in contact with the bottom of the lever 34, and the lever 34 is slidably contacted.

  The lever 34 has a rectangular cross-sectional shape perpendicular to the longitudinal direction, and a substantially triangular concave portion 34a is formed on the bottom thereof, as shown in FIG. A portion 34b is formed. A corner formed in the inward direction of the recess 34a is formed as an engaging portion 34c. The levers 34 are slidably attached in pairs to the storage grooves 16 provided along both long sides of the housing 14, and attachment arm portions 36 extending in a direction perpendicular to the longitudinal direction at both ends in the longitudinal direction. Are provided integrally. The mounting arm portion 36 is fitted in the fitting groove 20 of the housing 14, and both end portions of the lever 34 are pivotally supported by the housing 14.

  As shown in FIG. 2A and the like, a rotation support portion 38 of a semicircular protrusion is formed inside the attachment arm portion 36 so as to be able to rotate and slide. Further, a sliding guide 39 provided in a part of the bottom of the fitting groove 20 slightly protrudes. The sliding guide 39 is formed at the center lower portion of each fitting groove 20 and is formed with a space between the inner end of the fitting groove 20. An oval knob protrusion 40 is formed on the outer surface of the attachment arm portion 36. In the vicinity of the housing 14 on the upper surface of both end portions in the longitudinal direction of the lever 34, a latching portion 34 d with a notched end portion is provided. Further, the side surface of the lever 34 along the longitudinal direction, the mounting arm portion 36, and the corner portion of the knob projection 40 are rounded.

  Next, a method for using the IC socket 10 of this embodiment will be described. First, when the IC 12 is attached to the IC socket 10 fixed on a circuit board (not shown), as shown in FIG. 2A, the pair of levers 34 are slid horizontally in the horizontal direction and opened. Then, one end of the contact 30 is pushed up by the elastic force of the contact 30, and the end 30 c of the contact 30 comes into contact with the apex of the recess 34 a at the bottom of the lever 34. Next, as shown in FIG. 2B, the lead terminal 22 of the IC 12 is moved downward from the upper part of the groove part 24 along the partition so that the lead terminal 22 of the IC 12 is brought into contact with the contact part 30b of the contact 30. Then, the connection end 22 a of the lead terminal 22 is placed in contact with the contact portion 30 b of the contact 30. Then, as shown in FIG. 2C, when the side surfaces of both levers 34 are pressed in the inner horizontal direction of the housing 14, the convex portions 34 b and the concave portions 34 a on the bottom surface of the lever 34 become the contact portions 30 b and the end portions of the contacts 30. It slides on 30c and is bent and pushed.

  When the mounting arm portions 36 at both ends of the lever 34 are pushed in until they are in contact with the inner end of the fitting groove 20, as shown in FIG. 3D, the engaging portion 34 c of the lever 34 and the contact portion 30 b of the contact 30. As a result, the lead terminal 22 of the IC 12 is pinched. Then, as shown in FIG. 3E, when the levers 34 are further pushed into each other, the lever 34 rotates downward about the rotation support portion 38, and the lever 34 is further moved to the latching protrusion 18 of the storage groove 16. The latch portion 34d is fitted, the lever 34 is latched, and the IC 12 is fixed.

  Next, when removing the IC 12 attached to the IC socket 10, contrary to the attachment, the knob protrusion 40 shown in FIG. 3E is held, and as shown in FIG. When it is lifted to a horizontal position around 38, the latch is released. Subsequently, in a state where the knob protrusion 40 is supported, the levers 34 are horizontally slid to the left and right sides and opened. Then, as shown in FIG. 2B, the holding of the lead terminal 22 of the IC 12 is released, and the IC 12 is removed by lifting the IC 12 upward along the partition 26 forming the groove 24.

  According to the IC socket 10 of this embodiment, the surface mounting type IC 12 can be easily attached and detached by operating the lever 34. Further, it is easy to support by the knob protrusion 40, and the lever 34 slides and presses in an oblique direction with respect to the elastic force caused by the bending of the contact 30, so that the contact 30 can be bent with a small force. The operating force is reduced, and the lever 34 is easily operated.

  Further, since the lever 34 operates in the horizontal direction, the height of the housing 14 can be suppressed, and when the IC socket 10 is fixed on the circuit board, it can be fixed lower. is there.

  The IC socket of the present invention is not limited to the above embodiment, and vertical grooves are formed on the inner side surfaces of both long sides of the housing in accordance with the number of lead terminals of the surface mount IC, and a contact is provided for each. If there is. Further, even if the IC packages to be mounted have different lengths, they can be used together if the widths of the left and right lead ends and the pitch of the leads match. In addition, the side surfaces of both levers are pressed in the horizontal direction inside the housing, and both levers are slid and pushed to pinch the IC lead terminals so that the side surfaces of both levers protrude from the housing receiving grooves. If it is formed, it is easier to press.

  In addition, when pressing both levers, in addition to pressing with a finger or the like, pressing may be performed using a tool. The shape of the housing can be set as appropriate according to the IC to be placed.

It is a perspective view which shows the IC socket of one Embodiment of this invention. Partial sectional view (a) showing a state where the lever of the IC socket of this embodiment is opened, partial sectional view (b) showing a state where the IC is placed, and partial sectional view (c) showing a state where the lever starts to close ). 2D is a cross-sectional view (d) showing a state where the lever is closed, and a partial cross-sectional view (e) showing a state where the terminal of the IC is pressed by the lever, following the step of FIG. 2C of the IC socket of this embodiment. is there.

Explanation of symbols

10 IC socket 12 IC
14 Housing 16 Housing groove 20 Fitting groove 22 Lead terminal 24 Groove portion 26 Partition 28 Engagement groove 30 Contact 30a Terminal portion 30b Abutting portion 34 Lever 34a Recessed portion 34b Protruding portion 34c Engaging portion 34d Latching portion 36 Mounting arm portion 38a Rotation Base 40 Picking protrusion

Claims (3)

A housing to which a surface mount type IC is detachably mounted;
A plurality of grooves provided inside the side wall of the housing so that the lead terminals of the IC can be fitted;
A storage groove formed on a side surface of the housing in communication with the groove;
A plurality of contacts for surface mounting that are provided in each groove so that the lead terminals can come into contact with each other, and are made of a conductive elastic body;
In an IC socket provided with a lever locked to the housing and holding the lead terminals in contact with the contact surfaces ,
The lever is provided at both ends thereof with mounting arm portions that fit into fitting grooves formed on the outside of the side wall perpendicular to the side wall on which the housing groove of the housing is provided, and the lead terminal as the contact And an engaging portion formed so as to be sandwiched with
The lever is provided to be slidable from the outside with respect to the housing groove of the housing, and the mounting arm portion of the lever is slidably engaged with the fitting groove, An IC socket , wherein the lever swings and the engaging portion presses the lead terminal and presses against the contact portion of the contact while the lever is slid into the housing . 2. The IC socket according to claim 1 , wherein the lever is formed in a U shape with the attachment arm portions provided at both ends of the lever . 3. The IC socket according to claim 2 , wherein a knob protrusion is formed on an outer surface of the mounting arm portion of the lever .

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