JP2000195643A - Daughter-board separating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool for separating a daughter board from a mother board. SOLUTION: This daughter-board separating tool 10 is equipped with a base member 12 having a pair of support 1 legs abutting on a surface of a mother board M and a fixed handle 16, working members 18 each pivotally mounted, at one end part thereof, on the base member 12 via a link member 20 and mounted with a clamp mechanism 32 for holding a daughter board D, and a drive handle 22 pivotally mounted on the other end part of the working member 18 and on the base member 12 and causing one working member to make turning motion. The clamp mechanism 32 has a pair of crank arms 34 having lock parts 35 that lock side edge parts of the daughter board D when the support 1 legs abut on the surface of the mother board M, the daughter board D is held between the pair of crank arms 34, and when the one working member 18 is turned by the drive handle, the side edge parts of the daughter board D are separated from the mother board M.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug connector in which a large number of plug terminals having contact portions formed in a flat blade shape are arranged, and these blade-like contact portions are interposed between a pair of spring arms for meshing. A daughter board having a pair of side edges extending in a direction intersecting a plane along the contact portion of the plug terminal, the daughter board being coupled to the motherboard in a stacked state via a receptacle connector in which a number of matching receptacle terminals are arranged. , A tool for separating from the motherboard.

[0002]

2. Description of the Related Art With the increase in density and miniaturization of electronic devices such as computers, for example, connection portions with a substrate are formed by solder balls, and such solder balls are arranged in a grid on a housing. High density connectors called BGA connectors have been developed. Such BG
In the A connector, the connector is arranged on the contact pads arranged on the surface of the substrate, and thereafter, by heating, at least a part of the terminal formed by the solder ball is melted and bonded to the contact pad on the substrate. The spacing of the terminals formed by solder balls is very close, so that a large number of connections can be provided in a limited area on the substrate. In such a BGA connector, a plug connector to be attached to one substrate arranges a large number of plug terminals having contact portions formed in a flat blade shape, and a receptacle connector to be attached to the other substrate is provided between a pair of spring arms. A low-profile structure has been developed in which a large number of receptacle terminals are arranged so that these blade-like contact portions are sandwiched and engaged with each other. When the plug connector and the receptacle connector are fitted together, the blade-like contact portion of the plug terminal is sandwiched between a pair of spring arms of the receptacle terminal, thereby allowing the board mounting the plug connector and the board mounting the receptacle connector. The two substrates are connected in a stacked state in which the surfaces face each other at a very small interval.

However, since such a high-density BGA connector includes a very large number of terminals, the two substrates are held with a large force from each other after the plug connector and the receptacle connector are fitted together and separated from each other. Is difficult. In particular, when a daughter board is connected to a motherboard on which a large number of electronic components and the like are mounted by using a BGA connector, the electronic components and the like on the periphery of the daughter board can be used.
It is difficult to bring the tool close to the required position. Further, in the case of a connector in which the receptacle terminal is configured so that the blade-shaped contact portion is interposed between a pair of spring arms and meshes with each other, when a force in a direction perpendicular to the blade-shaped contact portion is applied, the receptacle terminal or the plug terminal is formed. May be damaged.

[0004] The present invention has been made in view of the above,
An object of the present invention is to provide a tool capable of extremely easily and surely separating a daughter board connected via a high-density connector to a motherboard on which a large number of electronic components and the like are mounted.

[0005]

According to the present invention, there is provided a plug connector in which a large number of plug terminals having contact portions formed in a flat blade shape are arranged, and these blade-like contact portions are sandwiched between a pair of spring arms. A pair of side edges extending in a direction intersecting with a plane along the contact portion of the plug terminal are coupled to the motherboard in a stacked state through a receptacle connector having a number of receptacle terminals arranged to be engaged with each other. A tool for separating the daughter board from the motherboard, the tool having a longitudinal dimension extending between both side edges of the daughter board, and having a pair of support legs abutting the surface of the motherboard projecting from both ends, and A base member having a fixed handle protruding from the side opposite to the support leg of the base member, and extending along the longitudinal direction of the base member. An operating member for mounting a clamp mechanism for gripping the daughter board, and a connecting member pivotally attached to one end of the operating member and one end of the base member to support the operating member movably with respect to the base member. And a drive handle pivotally attached to each of the other end of the actuating member and the base member to rotate the actuating member around the one end. A pair of clamp arms projecting along the support legs and having a locking portion capable of locking a side edge of the daughter board when the support legs abut against the surface of the motherboard; A side edge of the daughter board corresponding to the other end of the actuating member when the actuating member is rotated about the one end by the drive handle while holding the daughter board therebetween; Is spaced from the motherboard, to separate the plug and receptacle connectors, the tool is provided.

[0006] The clamp arm is formed in an L shape having an inner arm portion extending to the side facing each other and an outer arm portion provided with the locking portion. An arm-shaped spring having one end fixed to the inner arm portion of the arm, wherein the spring is pressed by the daughter board when the support leg comes into contact with the surface of the motherboard, and is a clamp arm which is close to the connecting member. It is preferable that the other end is engaged with the inner arm of the clamp arm and the outer arm of each clamp arm is urged toward the side facing each other. Preferably, the support leg has an opening for preventing interference with the outer arm of the clamp arm. Further, provided on a support leg close to the drive handle, when the drive handle comes into contact with the fixed handle, the clamp arm close to the drive handle is locked and the distal end of the outer arm of the clamp arm is supported. A stopper positioned in the opening of the leg, wherein the spring engages with the inner arm of the other clamp arm when the clamp arm is locked by the stopper, and the tip of the outer arm is It is preferably arranged in the opening of the support leg.

[0007]

1 to 3 show a tool 10 according to a preferred embodiment of the present invention, and FIG.
1 shows a daughterboard D and a motherboard M suitable for being separated by zero. As shown in FIGS. 1 to 3, the tool 10 of the present embodiment has a thick plate-shaped base member 12, and a pair of base members 12 shown in FIGS. Support legs 14 project downward, and from the side opposite to these support legs 14, a fixed handle 16 projects. The fixed handle 16 may have an appropriate shape that is easy to hold in a hand, and is firmly fixed to the base member 12. Also,
Each support leg 14 is formed in a thin plate shape, and is screwed to an end surface of the base member 12. The distal end portion 14a of the support leg 14 that is in contact with the motherboard M is formed narrower than the base member 12 side, and the inner surface side is formed in a tapered shape to damage electronic components or circuits on the motherboard M. Without contacting the surface of the motherboard M.
Reference numeral 14b denotes an opening for preventing interference with a clamp arm described later.

An operation member 18 extends below the base member 12 along the longitudinal direction of the base member 12. The operating member 18 is movably supported with respect to the base member 12 by connecting members 20 pivotally attached to one end of the operating member 18 and one end of the base member 12, respectively. The other end of the operating member 18 is pivotally connected to a drive handle 22 which is pivotally connected to the base member 12. Therefore, the base member 12 and the operating member 1
8, the connecting member 20, and the driving member 22 form a four-bar rotating mechanism.

The connecting member 20 and the drive handle 22 are disposed in recesses 24 and 26 formed at both ends of the base member 12, and these recesses 24 and 26 are open ends of the end surface of the base member 12. Are closed by the support legs 14, respectively. Therefore, the operating member 18, the connecting member 20, and the drive handle 22 are arranged between the pair of support legs 14. In the present embodiment, the operating member 18 is
A long leg 18 extending longitudinally of the base member underneath
a and a short leg 18 b extending substantially parallel to the connecting member 20. The short leg 18 b is pivotally attached to the drive handle 22 at the upper end. Further, these two members, the operating member 18 and the connecting member 20, are formed of a pair of thin plate members, and a clamp arm described later can be arranged between them.

The drive handle 22 extends substantially parallel to the fixed handle 16. The drive handle 22 is provided with a concave 26
The inner end of the bottom edge disposed therein is pivotally connected to the base member 12 via a pin 28, and the outer end adjacent to the support leg 14 is pivotally connected to the operating member 18 via a pin 30. The rotation range of the drive handle 22 is limited by the fixed handle 16 and the support leg 14. When the drive handle 22 abuts on the support leg 14, the long leg 18 a of the operating member 18 is disposed substantially parallel to the base member 12, and when the drive handle 22 abuts on the fixed handle 16, the operating member 18 Is the end near the drive handle 22, namely the short leg 18b.
Is rotated to a position closest to the base member 12.

The operating member 18 is provided with a clamp mechanism 32 for gripping both side edges of the daughter board D. The clamp mechanism 32 includes a pair of clamp arms 34 pivotally attached to both ends of the long leg 18 a of the operating member 18, and an arch-shaped spring 3 for interlocking these clamp arms 34.
6 (FIG. 2). Each clamp arm 34 includes an outer arm 34a extending in a direction away from the base member 12,
One end of a spring 36 is fixed to the inner arm 34b of the clamp arm 34 close to the drive handle 22. The spring 36 is formed in an L shape having an inner arm 34b extending inward and facing each other. The free end of the spring 36 extends to the inner arm 34b of the opposing clamp arm 34. Further, a groove-shaped locking portion 35 for locking the side edge portion of the daughter board D is formed in the outer arm portion 34 of each clamp arm 34, and the inner surface of the distal end portion is formed in a tapered shape. To ensure smooth engagement with the side edges.

The outer arm portions 34 of these clamp arms 34
In order to prevent the outer arm 34a from protruding outward from the opening 14b formed in the support leg 14, limiters 38 and 40 for restricting the movement of the respective inner arms 34b are provided. The limiter 38 is fixed to the base member 12, and the limiter 40 is fixed to the long leg 18a of the operating member 18. These inner arms 34b are used as limiters 38, 4
When the outer arm 34a is engaged with the support leg 14, the distal end of the outer arm 34a is disposed in the opening 14b of the support leg 14, as shown in FIG. Further, the support leg 14 close to the drive handle 22 is provided with a stopper 42 for locking the clamp arm 34 on the side close to the drive handle 22 when the drive handle 22 contacts the fixed handle 16. . The stopper 42 is formed of a thin plate, and has an opening 1 of the support leg 14.
The outer arm portion 34a of the clamp arm 34 which extends inward from the 4b and is locked is positioned within the opening 14b of the support leg 14. At this time, the spring 36 has its free end engaged with the inner arm 34b of the clamp arm 34 facing the same, and the tip of the outer arm 34a is arranged in the opening 14b of the support leg 14. Therefore, the drive handle 22 is fixed to the fixed handle 1
6, the outer arm portions 34a of the clamp arms 34 are arranged in the corresponding openings 14b of the support legs 14.

The tool 10 is particularly suitable for separating a daughter board D connected to a motherboard M via a BGA connector from the motherboard M, as shown in FIGS. In the present embodiment, the daughter board D
Is formed of a CPU module. For example, two CPU devices in which solder balls forming electrodes are arranged in a lattice are mounted, and a metal protection plate 50 is arranged on these devices. When the above-described tool 10 is used, the protection plate 50 contacts the spring 36 to protect the electronic components mounted on the board. This protection plate 5
0 can also be used for heat dissipation or electromagnetic shielding.

Further, on both side edges of the CPU module D, there are provided display portions 52 for indicating the positions of the support legs 14 described above. The display section 52 is a colored section on the board, and corresponds to a connector position for connecting to the motherboard M. A plug connector 56 (FIG. 5) that engages with the socket connector 54 mounted on the motherboard M is arranged between these two display units 52.
Is locked by the clamp mechanism 32, the stress acting on the CPU module D at the time of separation can be minimized. Each of the socket connector 54 mounted on the motherboard M and the plug connector 56 mounted on the CPU module D is a BGA connector, and solder balls arranged in a lattice are connected to contact pads arranged on the substrate surface. It is implemented by melting.

As shown in FIGS. 5 and 6, the plug terminal 60 disposed in the plug housing 58 includes a contact portion 62 formed in a flat blade shape, and a holding portion 64 held by the housing 58. And a solder ball 66 is attached to the holding portion 64 and the solder ball 6
The plug terminal 60 is held on the housing 58 by the shoulder 6 and the holding portion 64. The flat surface of the contact portion 62 is disposed in a plane substantially orthogonal to the side edge of the CPU module D. On the other hand, the receptacle terminal 70 disposed in the receptacle housing 68 includes a pair of spring arms that sandwich the contact portion 62 of the plug terminal, and a holding portion 7 that is held by the housing 68.
4 and the solder ball 76 is attached to the holding portion 74, and the receptacle terminal 70 is held on the housing 68 by the solder ball 76 and the shoulder of the holding portion 74.

The receptacle terminal 70 and the plug terminal 6
0 is fitted by moving the receptacle connector 54 and the plug connector 56 along the plane where the contact portions 62 of the plug terminals 60 are arranged. The distal end of the contact arm 72 is disposed in the receiving groove 59 formed in the plug housing 58, and therefore, the distance between the mother board M and the daughter board D when the receptacle connector 54 and the plug connector 56 are fitted is extremely small. Become. The connector having the plug terminal 60 and the receptacle terminal 70 having such a structure needs to be inserted and removed along a plane on which the contact portion 62 is arranged.
If a component in the vertical direction acts on the plane of the contact portion 62, the connector may be damaged. In the present embodiment, the contact portions 62 of the plug terminals are arranged in a plane orthogonal to the side edge of the CPU module D.

Next, a method of separating the CPU module D from the motherboard M by using the tool 10 will be described with reference to FIGS. First, FIG.
As shown in (2), the drive handle 22 is rotated toward the fixed handle 16 and brought into contact with the fixed handle 16. Thereby, the clamp arm 34 on the drive handle 22 side is pulled up toward the base member 12 and is locked by the stopper 42 (FIGS. 2 and 3), and the outer arm portion 34a is disposed in the opening 14b of the support leg 14. . Furthermore, the clamp arm 34 on the opposite side
Is pressed against the inner arm 34b by the spring 36, and the outer arm 34a
Is disposed in the opening 14 b of the support leg 14. As a result, the outer arm portion 34a of each clamp arm 34 is
4, and can be arranged at a required position without touching other electronic members even in a narrow gap.

Thereafter, as shown in FIG.
The distal end portions 14a of the support legs 14 are respectively set along the display portions 52 (FIG. 4) of the U module D, and the leading edges of the distal end portions 14a are brought into contact with the surface of the motherboard M. Then, the side edge of the CPU module D is locked by a locking portion 35 (FIG. 1) formed on the outer arm portion 34a of the clamp arm 34 on the fixed handle 16 side.

Thereafter, as shown in FIG. 8A, the drive handle 22 is turned from the fixed handle 16 to the opposite side,
The clamp arm 34 on the drive handle 22 side is lowered onto the surface of the motherboard M. When the spring 36 comes into contact with the protection plate 50 of the CPU module D, the inner arm 34b of each clamp arm 34 is pressed upward, that is, toward the base member 12 by the urging force of the spring, and the outer arms 34a face each other. Biased in the direction. Thus, the clamp arm 34 on the drive handle 22 slides on the inner surface of the outer arm portion 34a along the side edge of the CPU module, and the locking portion 3
5 locks this side edge. As a result, both side edges of the CPU module D are locked by the locking portions 35 of the clamp arms 34, and are elastically held between these clamp arms 34.

When the drive handle 22 is rotated toward the fixed handle 16 as shown in FIG. 8B, the clamp arm 34 on the drive handle 22 is lifted from the motherboard M, and the CPU module D is activated. Member 18
While maintaining the parallel state, and rises to a state inclined with respect to the motherboard M. Thereafter, when the entire tool 10 is rotated about the support leg 14 on the drive handle 22 side, the entire CPU module D is separated from the motherboard M. At this time, since the side edge portion is locked by the locking portion 35 of the clamp arm 34, the CPU module D continues to urge the spring 36, and therefore, the elasticity between the outer arm portions 34a of the clamp arm 34 is reduced. And is securely held.

Thereafter, since the groove-shaped locking portion is used, the CPU
The module D can be easily pulled out in one direction.

In this tool 10, the plug connector 56 is pulled out from the receptacle connector 54 by inclining the CPU module D from one side in a plane parallel to the plane in which the contact portions 62 of the plug terminals 60 are arranged. It is extremely safe because no force component is applied to each terminal in a direction perpendicular to the plane on which the contact portions 62 are arranged. In a state where the outer arm 34a of the clamp arm 34 is disposed in the opening 14b of the support leg 14, the CP
Even if only a narrow gap of about 1.5 mm is available on both sides of the CPU module D for mounting on the U module D, the CPU module D can be safely and securely removed without damaging electronic members on the motherboard M. Can be.

[0023]

As is apparent from the above, according to the tool of the present invention, a daughter board connected via a high-density connector to a mother board on which a large number of electronic components and the like are mounted can damage members on the mother board. And can be separated very easily and reliably. Further, according to the motherboard of the present invention, the spring provided on the tool is pressed by the protection plate, whereby the member on the motherboard can be securely held on the tool without damaging the members on the motherboard, and can be safely and securely separated from the motherboard. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a main part of a tool according to a preferred embodiment of the present invention.

FIG. 2 is an elevational view of the tool of FIG. 1 with a portion cut away;

FIG. 3 is a side view of the tool shown in FIG. 1 with a part thereof cut away;

FIG. 4 is a schematic perspective view showing a daughter board together with a motherboard according to a preferred embodiment of the present invention suitable for separation with the tool of FIG. 1;

5A and 5B show a connector structure for connecting the motherboard and the daughter board shown in FIG. 4, wherein FIG. 5A is a cross-sectional view and FIG. 5B is an explanatory view of a housing taken along line BB of FIG.

FIG. 6 is an explanatory diagram of a plug terminal and a receptacle terminal of the connector of FIG. 5;

FIG. 7 is an explanatory view showing a state when the tool according to the preferred embodiment of the present invention is mounted on the daughter board.

FIG. 8 is an explanatory view showing a state when the daughter board is separated from the motherboard.

[Explanation of symbols]

Reference numeral 10: tool, 12: base member, 14: support leg, 16 ...
Fixed handle, 18: operating member, 20: connecting member, 22
.., Drive handles, 24, 26 recesses, 32 clamp mechanisms, 34 clamp arms, 35 locking portions, 36 springs, 38, 40 limiters, 42 stoppers, 50 protection plates, 52 display units, 54 ... receptacle connector, 56 ... plug connector, 60 ... plug terminal, 62 ...
Contact portions, 66, 76: solder balls, 70: receptacle terminals, 72: contact arms.

Claims (4)

[Claims] A plug connector in which a large number of plug terminals having contact portions formed in a flat blade shape are arranged;
Via a receptacle connector in which a number of receptacle terminals are arranged and engaged with each other by sandwiching these blade-like contact portions between a pair of spring arms, and coupled to the motherboard in a stacked state, and a plane along the contact portion of the plug terminal. A tool for separating a daughter board having a pair of side edges extending in an intersecting direction from the motherboard, the tool having a longitudinal dimension extending between both side edges of the daughter board, and being provided on a surface of the motherboard. A base member having a pair of supporting legs abutting from both ends and a fixed handle protruding from the opposite side of the supporting legs; a clamp extending along the longitudinal direction of the base member and gripping the daughter board An operating member to which a mechanism is mounted; and an end portion of the operating member and an end portion of the base member pivotally attached to each of the operating member. A connecting member that movably supports the operating member with respect to the base member, and is pivotally attached to each of the other end of the operating member and the base member, and protrudes from the base member in the same direction as the fixed handle. A drive handle that rotates about one end, wherein the clamp mechanism projects from both ends of the operating member along the support legs, and when the support legs contact the surface of the motherboard, the It has a pair of clamp arms having a locking portion capable of locking the side edge portion, and holds the daughter board between the pair of clamp arms,
A tool for separating a plug connector and a receptacle connector by separating a side edge of a daughter board corresponding to the other end of the operating member from a motherboard when the operating member is rotated about the one end by the drive handle. 2. The clamp arm is formed in an L-shape having an inner arm portion extending to a side facing each other and an outer arm portion provided with the locking portion, and the clamp mechanism is close to a drive handle. An arc-shaped spring whose one end is fixed to the inner arm of the clamp arm, which is pressed by the daughter board when the support leg contacts the surface of the motherboard, and comes close to the connecting member. The tool according to claim 1, wherein the other end is engaged with the inner arm of the clamp arm, and the outer arm of each clamp arm is urged toward the side facing each other. 3. The tool according to claim 1, wherein the support leg has an opening for preventing interference with an outer arm of the clamp arm. 4. A clamp arm provided on a support leg adjacent to the drive handle, the clamp arm being close to the drive handle when the drive handle contacts the fixed handle, and a tip of an outer arm portion of the clamp arm. A stopper for positioning the portion within the opening of the support leg, wherein the spring engages with the inner arm of the other clamp arm when the clamp arm is locked by the stopper, and the tip of the outer arm 4. The tool according to claim 3, wherein the portion is disposed within an opening of the support leg.