CN216123281U

CN216123281U - Dismounting member for fixed daughter board in mother-daughter board set

Info

Publication number: CN216123281U
Application number: CN202121789410.0U
Authority: CN
Inventors: 赵龙; 谭笑婷
Original assignee: Zhongke Suzhou Intelligent Computing Technology Research Institute
Current assignee: Zhongke Suzhou Intelligent Computing Technology Research Institute
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-03-22
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses a disassembly and assembly component for fixing a daughter board in a mother-daughter board set, which is associated with a mother board, the daughter board and a probe module and is assembled and combined by a lock catch unit, an aluminum alloy pressing block, positioning columns and a knob, wherein the positioning columns are fixedly arranged on the surface of the mother board in pairs in a spaced manner and are in an upright shape; the locking unit is provided with a pair of locking buckles which are connected in a sliding mode and are elastically expanded towards two sides based on the locking buckle base body, the outer end portion of any locking buckle is provided with a locking buckle clamping groove which is semi-wrapped on the positioning column and is clamped and limited on the end cap, the center of the locking buckle base is provided with a through hole, the aluminum alloy pressing block is installed at the bottom of the locking buckle base body and is elastically floated towards the separation direction through the second spring and the pin column, the knob is connected into the through hole and pushes the aluminum alloy pressing block to enable the daughter board to be pressed towards the mother board through rotation, and the aluminum alloy pressing block is separated from the daughter board through reverse rotation. By using the dismounting component, a user does not need to dismount the screw complexly when replacing the PCB daughter board, and the PCB daughter board can be dismounted and mounted simply by rotating the knob and pushing against the operating column.

Description

Dismounting member for fixed daughter board in mother-daughter board set

Technical Field

The utility model belongs to a PCB (printed circuit board) assembly structure, and particularly relates to a quick disassembly support for fixing a daughter board in a mother board lamination assembly scheme.

Background

In recent years, the demand of the semiconductor market has been continuously increased, and the global occupation has been greatly increased in a short time. In the semiconductor market, the proportion of integrated circuits is over 80%, and the chip used as a carrier of the semiconductor is rapidly developed. The chip test needs to be connected to a test system, and different chips need different PCB boards for testing. In order to solve the problem that the whole PCB board needs to be redesigned each time, one of the existing technical solutions is to design a PCB motherboard connected to a test system, so that different chip tests only need to redesign the PCB daughter board. The daughter board and the motherboard are connected through a probe module, and a fixing mode or a fixing bracket is needed for fixing the PCB daughter board, the probe module and the PCB motherboard.

In the prior art, the installation among the PCB daughter board, the probe module and the PCB motherboard is to completely fix the three components by passing bolts through the installation holes among the PCB daughter board, the probe module and the PCB motherboard. Such a fixing method has a number of problems: firstly, the PCB daughter board needs to be frequently disassembled and replaced for testing, a plurality of screws need to be unscrewed in the disassembling process, the operation is complicated, and corresponding screws need to be frequently and sufficiently equipped; secondly, frequent assembly and disassembly of the screws may cause damage to the probe modules and the PCB motherboard mounting holes, eventually resulting in the rejection of the PCB motherboard and the probe modules.

Disclosure of Invention

The utility model aims to provide a dismounting member for fixing a daughter board in a daughter board set, so as to solve the problems in the prior art.

The technical solution of the utility model for realizing the above purpose is as follows: the utility model provides a dismouting component of fixed daughter board in daughter board group, associates mother board, daughter board, probe module and establishes its characterized in that: the disassembly and assembly component is assembled and combined by a lock catch unit, an aluminum alloy pressing block, positioning columns and a knob, wherein the positioning columns are fixedly arranged on the surface of the mother board in a pair-spaced mode and are in an upright shape, and end caps with enlarged diameters are formed at the top ends of the positioning columns; the locking unit is provided with a pair of locking buckles which are slidably connected in the locking buckle unit and elastically expanded towards two sides, the outer end part of any locking buckle is provided with a locking buckle clamping groove which is semi-wrapped with a positioning column and is clamped and limited on the end cap, the center of the locking buckle base is provided with a through hole with a thread groove, the aluminum alloy pressing block is arranged at the bottom of the locking buckle base and is elastically floated towards the separation direction through a second spring and a pin column, the knob screw rod is connected in the through hole and pushes the aluminum alloy pressing block to press the daughter board towards the mother board through rotation in one direction, and the pressure is released through reverse rotation or is separated from the aluminum alloy pressing block.

Preferably, the lock catch base is provided with two sliding grooves which are symmetrical relative to the center of the through hole; the lock catch penetrates through any sliding groove and linearly slides in the sliding groove, a tool withdrawal groove is formed at the inner end, close to the through hole, of the sliding groove, a first spring for pushing the lock catch outwards is arranged at the inner end, away from the through hole, of the lock catch base and the outer end, far away from the through hole, of the sliding groove of the lock catch base, a base positioning groove is formed in the outer end, far away from the through hole, of the lock catch base, and the base positioning groove, the positioning column and an end cap of the positioning column are movably sleeved and provided with surplus space.

Preferably, the lock catch base is provided with a baffle plate for sealing the tool withdrawal groove and the first spring at the inner end of the sliding groove.

Preferably, the hasp connects and is equipped with the protruding operation post of form, and the hasp base has seted up the guide slot that slides, the bottom of operation post pierces through the hasp and stretches into the limited slip of stroke in the guide slot that slides.

Preferably, the round pin post has round pin cap, center pillar and the fore-set that the external diameter contracts in proper order, and the round pin post passes through the fore-set and the bottom spiro union of hasp base is fixed, the aluminum alloy briquetting is equipped with the reducing hole that link up the form corresponding every round pin post, wherein the internal diameter alpha on reducing hole top side satisfies with center pillar clearance fit, and the internal diameter beta of reducing hole bottom side satisfies with round pin cap clearance fit, the second spring cup joints in center pillar and both ends and supports and lean on the reducing terminal surface in round pin cap and reducing hole.

Preferably, the aluminum alloy pressing block is provided with a pressing block positioning groove which is movably sleeved with the positioning column and has a surplus space.

Preferably, still include the rigid coupling in daughter board surface and with the relative insulation board of aluminum alloy briquetting, the insulation board is equipped with the insulation board constant head tank that cup joints with the reference column activity and have surplus space.

Preferably, the positioning columns are arranged in pairs in a spaced manner based on positioning bases, the positioning bases are fixedly connected to the bottom side of the mother board, and the positioning columns penetrate through the surface of the mother board to be upright.

Preferably, the probe modules are fixedly connected to the surface of the motherboard and sleeved with the exposed positioning columns, and the number of the disassembling and assembling members corresponding to the probe modules is more than one set.

Preferably, the bottom of the knob is provided with a thread groove matched with the through hole, and the top of the knob is provided with a holding part suitable for operation and rotation.

Compared with the prior art, the utility model has substantive characteristics and progressiveness, and has the beneficial effects that: 1. when a user replaces the PCB daughter board, the PCB daughter board can be detached and installed simply by rotating the knob and pushing against the operating column without disassembling screws in a complicated way; 2. the knob is matched with the stainless steel pressing block, so that the PCB can be in good contact with the probe module, and the whole system has good conductivity; 3. the installation requirements of PCB daughter boards with different thicknesses can be met by adjusting the rotation angle of the knob.

Drawings

Fig. 1 is an exploded view of the mechanism of the present invention.

Fig. 2 is a schematic structural view of the present invention in practical use.

1-mother board, 2-daughter board, 3-probe module, 31-probe module fixing screw, 4-locking unit, 41-locking base, 411-sliding groove, 412-base positioning groove, 413-tool withdrawal groove, 414-sliding guide groove, 415-through hole, 42-locking, 421-locking clamping groove, 43-first spring, 44-baffle, 45-operation column, 46-baffle fixing screw, 5-aluminum alloy pressing block, 51-reducing hole, 52-pressing block positioning groove, inner diameter of top side of alpha-reducing hole, inner diameter of bottom side of beta-reducing hole, 6-positioning base, 61-positioning column, 611-end cap, 7-knob, 71-thread groove, 72-holding part, 8-insulating board, 81-insulating board positioning groove, 9-pin, 91-pin cap, 92-center post, 93-top post, 94-second spring.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings for the purpose of understanding and controlling the technical solutions of the present invention, so as to define the protection scope of the present invention more clearly.

In view of the technical summary, the present invention discloses a detachable member for fixing daughter boards in a daughter-mother board assembly, which is associated with a mother board 1, daughter boards 2, and probe modules 3, and the detachable member is assembled and combined mainly by a locking unit 4, an aluminum alloy pressing block 5, a positioning column 61, and a knob 7.

Referring to fig. 2, the positioning base 6 is fixedly connected to the bottom side of the motherboard 1, and the positioning posts 61 penetrate through the surface of the motherboard to form an upright shape, the positioning posts 61 are fixedly arranged on the surface of the motherboard 1 in pairs in an upright shape, and the top ends of the positioning posts 61 are formed with end caps 611 with increased diameters. It should be noted that the end cap 611 is one of the important components of the function of the detachable member of the present invention, and cooperates with the locking unit 4 to achieve height limitation of the locking unit and the unit as a whole, as will be understood from the drawings and the detailed description below.

Referring to fig. 1 and 2, the latch unit 4 is provided with a pair of latches 42 slidably connected to the latch base 41 and elastically expanding toward two sides, the outer end of any latch 42 is provided with a latch slot 421 semi-wrapping the positioning post 61 and engaging and limiting on the end cap 611, and the center of the latch base 41 is provided with a through hole 415 with a thread groove. In order to satisfy the slidable property and the elastic expansion of the pair of lock catches, the lock catch base 41 is provided with two sliding grooves 411 which are symmetrical relative to the center of the through hole 415; corresponding to any sliding groove, the lock catch 42 is penetrated in the sliding groove 411 for linear sliding; and the inner end of the chute 411 close to the through hole 415 is formed with a relief groove 413 which needs to be withdrawn from the T-shaped milling cutter for processing the chute, and is provided with a first spring 43 which pushes the lock catch 42 outwards, so that the lock catch is elastically pressed to the side of the relief groove close to the through hole and is kept outwards in tension by the reaction force of the first spring. When the pair of lock catches are pressed inwards by external force, the lock catch clamping grooves on the outer sides of the pair of lock catches are separated from the positioning columns and the end caps thereof, so that the lock catch units can be freely lifted and moved and can also be detached from the upper part of the sub-board 2; and after the locking unit finishes the falling position relative to the positioning column, and releases the external force of the locking buckle, the locking buckle slides outwards along with the elasticity released by the first spring until the locking buckle clamping groove abuts against the positioning column, and abuts against the end cap along with the upward sliding to realize the locking in one stage, namely, the sub-plate 2 is fixed in the horizontal direction.

In order to facilitate the operability of the lock catch, the lock catch 42 is connected with a convex operating column 45, the lock catch base 41 is optionally provided with a sliding guide groove 414, and the bottom of the operating column 45 penetrates through the lock catch 42 and extends into the sliding guide groove 414 to slide in a limited way. In other words, in an actual implementation case, the stroke range for unlocking and locking by operating the lock catch is small, so that the continuity of the operation of the lock catch is ensured to a certain extent through the stroke limitation of the sliding guide groove. In addition, the operation column can be integrally welded with the lock catch, a sliding guide groove is omitted, and the lock catch can be conveniently operated manually to slide.

The outer ends of the locking base 41 and the sliding groove 411 thereof far away from the through hole 415 are provided with base positioning grooves 412, the base positioning grooves 412 are movably sleeved with the positioning columns 61 and the end caps 611 thereof, and have surplus space, so that the interaction is not interfered and the positioning is accurate when the positioning columns are sleeved by the whole locking unit. The aluminum alloy pressing block 5 is also provided with a pressing block positioning groove 52 which is movably sleeved with the positioning column 61 and has a surplus space.

In addition, the lock base 41 is connected with a baffle 44 for closing the tool withdrawal groove 413 and the first spring 43 at the inner end of the sliding groove, and is fixed in the tool withdrawal groove 413 by a baffle fixing screw 46, so as to prevent the first spring from bouncing off or falling dust inside due to unbalanced stress from affecting the sliding flexibility.

The aluminum alloy pressing block 5 is attached to the bottom of the lock base 41 and is elastically floated in a separating direction by the second spring 94 and the pin 9, the knob 7 is screw-connected in the through hole 415, the aluminum alloy pressing block 5 is rotationally pushed in the same direction, the daughter board 2 is pressed against the mother board 1, and conversely, the daughter board 2 is separated from the aluminum alloy pressing block 5 by releasing pressure through reverse rotation. The height of the lock catch base 41 relative to the mother board 1 is unchanged, and when the knob 7 is pressed downwards, the lock catch base pushes the aluminum alloy pressing block 5, so that the sub board 2 is pressed downwards. The height of the daughter board 2 in the vertical direction can be adjusted at this time.

In detail, the pin 9 has a pin cap 91, a center post 92 and a top post 93, the outer diameters of which are sequentially contracted, the pin 9 is fixed to the bottom of the latch base 41 through the top post 93 by a screw thread, the aluminum alloy pressing block 5 is provided with a through-shaped reducing hole 51 corresponding to each pin 9, wherein the inner diameter α of the top side of the reducing hole satisfies clearance fit with the center post 92, the inner diameter β of the bottom side of the reducing hole satisfies clearance fit with the pin cap 91, the second spring 94 is sleeved on the center post 92, one end of the second spring abuts against the pin cap 91, the other end of the second spring abuts against the reducing end face of the reducing hole 51, and the inner diameter β of the bottom side of the reducing hole is larger than the inner diameter α of the top side of the reducing hole. Therefore, the position of the pin 9 relative to the lock catch base 41 is constant, and the second spring sleeved on the pin is pressed against the variable-diameter end faces of the pin cap and the aluminum alloy pressing block in a compressed state. Therefore, the aluminum alloy pressing block is tightly abutted to the lock catch base 41 under elastic tension without external force, and after the external force is applied to the stainless steel pressing block through the knob, the aluminum alloy pressing block overcomes the elastic tension to be separated from the lock catch base 41 and applies pressure to the daughter board. Thereby, the principle that the aluminum alloy compact is arranged toward the separation direction to be elastically floated can be understood.

The surface of the aluminum alloy compact 5 is subjected to oxidation treatment and is therefore insulating. However, in order to prevent the oxide layer of the aluminum alloy pressing block 5 from being damaged due to severe friction, thereby causing short circuit and damage to the circuit board, the utility model further comprises an insulating plate 8 which is fixedly connected to the surface of the daughter board 2 and is opposite to the aluminum alloy pressing block 5, and the insulating plate 8 is provided with an insulating plate positioning slot 81 which is movably sleeved with the positioning column 61 and has a surplus space.

The probe modules 3 are fixedly connected to the surface of the motherboard 1 and are sleeved with the exposed positioning posts 61, and the number of the detachable components corresponding to the number of the probe modules 3 is two. In this embodiment, a set of dismounting members is provided, and since two positions of the daughter board 2 need to be connected to the motherboard 1 through the probe module, and both sides are pressed down simultaneously, the stress on the daughter board 2 can be more uniform and better in conductivity.

Finally, the bottom of the knob 7 is provided with a thread groove 71 matched with the through hole, and the top of the knob 7 is provided with a holding part 72 convenient for the hand to operate and rotate.

In summary, the technical scheme introduction and the embodiment detailed description of the utility model can be seen, and the scheme has the substantive characteristics and the progressiveness: when a user replaces the PCB daughter board, the PCB daughter board can be detached and installed simply by rotating the knob and pushing against the operating column; 2. the knob gland has a good pressing effect, so that the PCB daughter board can be in good contact with the probe module, and the whole system has good conductivity; 3. the installation requirements of PCB daughter boards with different thicknesses can be met by adjusting the rotation angle of the knob.

In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations are within the scope of the present invention as claimed.

Claims

1. The utility model provides a dismouting component of fixed daughter board in daughter board group, associates mother board (1), daughter board (2), probe module (3) and establishes its characterized in that: the disassembly and assembly component is assembled and combined by a lock catch unit (4), an aluminum alloy pressing block (5), a positioning column (61) and a knob (7), wherein the positioning columns (61) are fixedly arranged on the surface of the mother board (1) in pairs in a spaced manner and are vertical, and end caps (611) with increased diameters are formed at the top ends of the positioning columns (61); the locking unit (4) is provided with a pair of locking buckles (42) which are slidably connected into the locking buckles (4) and elastically and outwardly expanded towards two sides based on locking buckle bases (41), the outer end part of any locking buckle (42) is provided with a locking buckle clamping groove (421) which is semi-wrapped with a positioning column (61) and is limited on an end cap (611) in a clamping manner, a through hole (415) with a thread groove is formed in the center of the locking buckle base (41), an aluminum alloy pressing block (5) is arranged at the bottom of the locking buckle base (41) and is separated towards elastic floating arrangement through a second spring (94) and a pin column (9), a screw rod of a knob (7) is connected into the through hole (415) and pushes the aluminum alloy pressing block (5) to enable the daughter board (2) to be pressed towards the mother board (1) through rotation in one direction, and pressure is released through reverse rotation or separated from the aluminum alloy pressing block (5).

2. The removable member for fixing a daughter board in a daughter board assembly according to claim 1, wherein: the lock catch base (41) is provided with two sliding grooves (411) which are symmetrical relative to the center of the through hole; corresponding to any sliding chute, the lock catch (42) is connected in the sliding chute (411) in a penetrating mode and slides linearly, a tool withdrawal groove (413) is formed in the inner end, close to the through hole (415), of the sliding chute (411) and provided with a first spring (43) pushing the lock catch (42) outwards, a base positioning groove (412) is formed in the outer end, far away from the through hole, of the lock catch base and the sliding chute of the lock catch base, and the base positioning groove (412) is movably sleeved with the positioning column (61) and an end cap (611) of the positioning column and provided with a surplus space.

3. The removable member for fixing a daughter board in a daughter board assembly according to claim 2, wherein: and a baffle (44) for sealing the tool withdrawal groove (413) and the first spring (43) is connected to the inner end of the sliding groove of the lock catch base (41).

4. The removable member for fixing daughter boards in a daughter board assembly according to claim 1 or 2, wherein: the lock catch (42) is connected with a convex operation column (45), the lock catch base (41) is provided with a sliding guide groove (414), and the bottom of the operation column (45) penetrates through the lock catch (42) and extends into the sliding guide groove (414) to slide in a limited way.

5. The removable member for fixing a daughter board in a daughter board assembly according to claim 1, wherein: round pin post (9) have the external diameter and contract in proper order round pin cap (91), center pillar (92) and fore-set (93), and round pin post (9) are fixed through the bottom spiro union of fore-set (93) and hasp base (41), aluminum alloy briquetting (5) are equipped with reducing hole (51) of lining up the form corresponding every round pin post (9), and wherein the internal diameter alpha on reducing hole top side satisfies with center pillar (92) clearance fit, and the internal diameter beta of reducing hole bottom side satisfies with round pin cap (91) clearance fit, second spring (94) cup joint in center pillar (92) and both ends support and lean on in the reducing terminal surface in round pin cap (91) and reducing hole (51).

6. The removable member for fixing daughter boards in a daughter board assembly according to claim 1 or 5, wherein: the aluminum alloy pressing block (5) is provided with a pressing block positioning groove (52) which is movably sleeved with the positioning column (61) and has a surplus space.

7. The removable member for fixing a daughter board in a daughter board assembly according to claim 1, wherein: still include rigid coupling in daughter board (2) surface and insulation board (8) relative with aluminum alloy briquetting (5), insulation board (8) are equipped with insulation board constant head tank (81) that cup joints and have surplus space with reference column (61) activity.

8. The removable member for fixing a daughter board in a daughter board assembly according to claim 1, wherein: the positioning columns (61) are arranged in pairs in a spaced manner based on the positioning bases (6), the positioning bases (6) are fixedly connected to the bottom side of the mother board (1), and the positioning columns (61) penetrate through the surface of the mother board to be upright.

9. The removable member for fixing a daughter board in a daughter board assembly according to claim 1, wherein: the probe modules (3) are fixedly connected to the surface of the motherboard (1) and are sleeved with the exposed positioning columns (61), and the disassembling and assembling components are configured into more than one set corresponding to the number of the probe modules (3).

10. The removable member for fixing a daughter board in a daughter board assembly according to claim 1, wherein: the bottom of the knob (7) is provided with a thread groove (71) matched with the through hole, and the top of the knob (7) is provided with a holding part (72) suitable for operation and rotation.