CN2285014Y - High Density Low Profile Printed Circuit Board Connectors - Google Patents

Abstract

The utility model discloses a low-type printed circuit board connector of high density, it can overcome factors such as external vibration and keep good electric conductivity performance. The main structure of the connector is that a conducting strip (30) (70) of an insulating body (20) is provided with cantilever type elastic contact arms (39) (76), elastic clamping type end retainers (60) or (80) for clamping a daughter board (41) are arranged at two ends of the body (20), a middle retainer (90) is arranged in the middle of the body (20), and a conducting support element (65) or (85) at the lower part of the end retainer (60) or (80) and the middle retainer (90) enable the connector (10) to be stably connected with the motherboard.

Description

High Density Low Profile Printed Circuit Board Connectors

The utility model relates to a high-density low-profile connector used for connecting printed circuit boards.

At present, the design of high-density connectors is developing towards its low shape, and the daughter board (ie, the circuit board inserted into the connector slot) and the connection path of the daughter board are also reduced accordingly. The daughter board plug-in connector of the prior art is only clamped by the conductive strip, but this clamping force is not enough. Since there are industrial gold or palladium-nickel-gold coatings at the contact points of the conductive sheet and the contact points of the sub-board connection channels, the force should not be too large during the multiple times of pulling out and inserting the sub-board, otherwise the coating will be easily scratched off; After the relevant overall combination, the collision vibration during the handling process will cause the sub-board to be elastically detached, resulting in poor power supply, and the vibration in different environments will cause the sub-board to shake, resulting in instantaneous power failure. There are also connectors that have been improved to prevent the sub-board from detaching and shaking. It extends the rails at both ends of the socket of the connector body much higher than the top surface, but it can only reduce the shaking range of the sub-board and cannot really prevent the sub-board. Shaking and detachment, and its height from the top surface of the body will be very brittle because the body material is high-temperature-resistant insulating plastic, which is easy to cause breakage; after the body adopts a low-profile structure, the elastic movable length of the conductive sheet is insufficient, and the movable range is reduced, which is easy to cause Elastic fatigue, which affects the quality of connector products.

The purpose of this utility model is to design a high-density and low-profile printed circuit board connector, which has the characteristics of reliable connection between the daughter board and the mother board, good contact electrical conduction performance after connection, and long service life of the product.

The technical scheme of the utility model is that it has an insulating body with a plug-in slot, and there are several conductive sheet installation grooves on both sides of the plug-in slot, which correspond to the corresponding conductive sheet installation grooves on the opposite side, and each conductive sheet There is a rib on the inner side of the upper part of the installation groove and a partition rib on the bottom to separate the lower parts of the two opposite grooves. On both sides of the insertion groove, there are conductive strips. The contact arm protruding groove communicates with the conductive strip installation groove. A conductive sheet with a cantilevered elastic contact arm is placed in the sheet mounting groove, and the two ends of the insulating body are installed through mounting holes to hold the daughter board and connect the motherboard (that is, the circuit board on which the bottom of the connector is fixed) The elastic clip-type end fixer is used, and the middle part of the insulating body is equipped with a middle fixer for connecting the body to the motherboard through the installation hole.

Further description will be made below in conjunction with the accompanying drawings and embodiments.

Description of drawings:

Fig. 1 is the external (stereoscopic) structure of the utility model,

Figure 2 is a top view of the connector shown in Figure 1,

Fig. 3 is the front view structure of the connector in Fig. 1 (wherein the component (90) has a partial section),

Fig. 4 is the sectional structure of 2C-2C in Fig. 1,

Fig. 5 is a kind of embodiment structure of end fixer,

Fig. 6 is a sectional perspective view of 4A-4A in Fig. 1,

Fig. 7 is the sectional structure of 4A-4A in Fig. 1,

Figure 8 is a structural situation when conductive sheets are arranged in rows,

Figure 9 is a side view of the components shown in Figure 8,

Fig. 10 is a kind of embodiment structure of middle fixer,

Figure 11 is a side view of the element of Figure 10,

Fig. 12 is the sectional structure of the connector that the conductive sheet of another embodiment structure is housed,

Fig. 13 is a side view structure when the conductive sheets in the orientation shown in Fig. 12 are arranged in a row,

Fig. 14 is a side view structure of the conductive sheet in Fig. 13,

Fig. 15 is a top view of the connector adopting the end retainer of the second embodiment,

Fig. 16 is a front view of the connector shown in Fig. 15 (wherein the component (90) is partially cut away),

Fig. 17 is a cross-sectional structure taken along line 8C-8C in Fig. 15 . In said attached drawings:

10-Connector 20-Insulation body

21-Conductive sheet installation slot 22-Insert slot

23-Separation Rib 24-Gear Rib

25-Mounting hole 26-Mounting hole

27-Mounting hole 30-Conductive sheet

31-Pin 311-Inner folding end

312-cantilever 313-left bump

314-right bump 32-base

33-Clamping bump     34-Clamping bump

35-Anti-arc 36-Arc

37-Curved arm 39-Cantilever elastic contact arm

40-connecting strip 41-sub-board

60-end retainer 61-base

62-Clamp arm 63-Clamping part

64-Protrusion thorn 65-Guide support element

66-Curved foot 67-Auxiliary foot

68-Jig arm 681-Clamping part

6811-motherboard 69-convex part

70-conductive sheet 71-pin

72-Straight Body 73-Spine

74-arc 741-upper end

742-straight part 75-curved arm

76-cantilever elastic contact arm 77-convex part

78-interference end 80-end retainer

81-Base 82-Clamp Arm

83-Protruding thorn 84-Clamping part

85-Guide support element 86-Foot

87-convex part 90-middle fixer

91-Base 92-Foot

93-convex part 94-convex thorn

From Fig. 1 to Fig. 3 and Fig. 15 and Fig. 16, it can be seen that the connector (10) of the utility model has an insulating body (20) with a plug-in slot (22), and each side of the plug-in slot (22) is There are several conductive sheet mounting grooves (21) and they are respectively corresponding to the corresponding conductive sheet mounting grooves on the opposite side, and there are ribs (24) shown in Fig. 6 or Fig. 7 on the inner side of each conductive sheet mounting groove (21). Its bottom has the dividing rib (23) that is used to separate the lower part of the relative two grooves, and the two side walls of the insertion groove (22) have conductive sheet contact arm extending grooves to communicate with the installation groove (21). Its design feature is that the A conductive sheet (30) or (70) with a cantilevered elastic contact arm (39) or (76) is placed in the conductive sheet installation groove (21), and the two ends of the insulating body (20) pass through the mounting hole (25) or (27) An elastic clip-type end fixer (60) or (80) for clamping the sub-board (41) and the motherboard (6811) is equipped, and the middle part of the insulating body (20) is equipped with a mounting hole (26) for A middle fixer (90) that connects the main body (20) with the motherboard (6811).

Referring to Fig. 4 and Fig. 5 and Fig. 1 to Fig. 3, the structure of a kind of elastic end retainer (60) is, it has base (61), and base (61) has two clamping arms (62) that extend upwards and is positioned at this. Between the two clamping arms (62) and on the end clamping arm (68) located outside it, the base (61) is provided with a projection (69) and two side thorns ( 64), there are convex clamping parts (63) inside the upper ends of the two clamping arms (62), and the two clamping arms (62) protrude from the top surface of the insulating body (20). There are also recesses corresponding to the clamping portion (63) on both sides of the end clamp arm (68), which are only formed by stamping. The base (61) also has a downwardly extending guide support element (65), referring to Fig. 5, it has a curved foot (66) and two auxiliary feet (67) on both sides, which pass through the mother board (6811) correspondingly The provided hole surfaces are thus fixed (to the connector) on the motherboard. The above is the overall structure of the end fixer and the lower guide support element, and the two can also be made into separate parts and used independently. At this moment, the mounting hole (25) can be designed as a T-shaped hole as shown in Fig. 2 .

The design principle of the above-mentioned end retainer (60) is that when the sub-board (41) is embedded between the two clamp arms (62), it is clamped by the two clamp arms (63) and the end clamp arms (68) at the same time. The end holders (60) are respectively provided at both ends of the insulating body (20), so the sub-board obtains clamping forces in four directions, front, rear, left, and right, and its elastic clamping force can clamp the entire sub-board, and the end clamping arm ( 68) has a clamping part (681) (see Figure 3) to match the corresponding recess of the sub-board (41), so that it can clamp the sub-board (41) more firmly, thereby preventing the vibration of the sub-board (41) from shaking and break away.

Referring to Fig. 15 to 17, this is the structure of an end fixer (80) as yet another embodiment. Its structure difference with end fixer (60) is that remove end clamp arm (68) and curved foot (66) on the structure basis of described fixer (60) and be the structure of this end fixer (80). At this time, the installation hole (27) on the insulating body (20) can be in the shape of a straight groove. In other words, the end clamp arm (68) and curved foot (66) are added on the basis of the structure of the end fixer (60) to form the structure of the end fixer (80). As long as the clamping force of the two clamping arms (63) is reasonably designed, the sub-board (41) can be firmly clamped, and its working principle is similar to that of the former.

Referring to Fig. 10 and Fig. 11, the structure of the middle fixer (90) in the middle fixer hole (26) (its effect is similar to the effect of the aforementioned guide support element (65) or (85)) is that it has a base (91) and the two feet (92) extending downwards, the base (91) has a convex portion (93) and two side thorns (94), and the two feet (92) are used to be fixedly connected with the motherboard (6811) , the convex part (93) and the thorn (94) are used to make the base part (91) of the middle fixer (90) firmly snap into the hole (26).

The above-mentioned end fixer and middle fixer can also adopt other common structures in the prior art.

Referring to Fig. 6 to Fig. 9, described conductive sheet (30) (one kind of embodiment) structure that is made by good elastic metal sheet is, it has the base (32) that both sides are clamped on the bottom of conductive sheet mounting groove (21) ), on which there are pins (31) protruding from the body (20) up and down, and the base (32) has a clamping bump (33) (34) that makes the base firmly clamped to the bottom of the groove (21). Clamping protrusions (33) (34) are provided on both sides of the base (32), so that the base (32) is in the center of the groove (21); the base (32) has an upwardly extending elastic cantilever contact arm ( 39), it consists of arc portion (36), anti-arc portion (35), curved arm (37), and a cantilever (312) with inner folded end (311) in turn, and is provided with a left arm on the contact arm (39). Protruding point (313) and right protruding point (314), said protruding point (313) (314) plays a role in positioning the arm (39) in the groove (21). When the conductive piece (30) is loaded into the groove (21), the contact arm (39) extends into both sides of the insertion groove (22) as shown in Figure 7, and when the sub-board (41) shown in Figure 8 is inserted into When in the groove (22), the contact arm (39) with good elasticity on both sides can maintain reliable electrical contact performance therewith. The retaining ribs (24) and the separating ribs (23) in the groove (21) keep the two opposite conductive sheets (30) in a good installation position without short-circuiting (see Fig. 7). In actual production, the conductive sheet (30) is embedded into the groove (21) once from the bottom of the body (20), and the pins (31) are used for welding on the circuit board (motherboard). The embedding process is to insert the conductive sheet (30) combine the material strips (40) into one body (referring to Fig. 8), insert them at one time from the bottom of a plurality of neatly arranged insulating bodies (20), and then separate the strips (40) from the conductive sheets (30). Can. The elastic design of this cantilever structure can increase its elastic range of motion and disperse elastic stress.

Referring to Figures 12 to 14, the structure of the conductive sheet (70) as the utility model (another embodiment) is that the lower end of the straight body portion (72) is a pin (71) protruding from the bottom of the body (20) , the pin (71) can be inwardly bent as shown in Figure 12, or it can be inwardly bent as opposed to it or stretched straight down from the straight body portion (72), with all thorns (73) The upper end (741) of the straight body part (72) has an arc part (74), a straight part (742), a curved arm (75), a cantilever type elastic contact arm with a conflicting end (78) and a convex part (77) in sequence (76). As can be seen from Fig. 12, the conflicting end (78) abuts on the partition rib (23), and the inner side of the crank arm (75) abuts on the retaining rib (24) to thereby be positioned. The effect of the thorns (73) is the same as the aforementioned similar structures.

The overall design principle of the present utility model can be known from the above structure. The conductive sheet (32) (70) has a good elastic cantilever type contact arm, which can be connected to the conductive path (commonly known as "gold finger") of the sub-board (41). To maintain good electrical contact, the end holder (60) (80) can further stably clamp the sub-board, making it difficult to shake and disengage when unfavorable factors such as external vibrations occur, and the guide support element (65) (85) and The middle retainer (90) makes the connector (10) firmly connected with the motherboard (6811).

It can be seen from the above that the utility model is a high-density low-profile printed circuit board connector, which is reliable in connecting the sub-board and the motherboard, has good contact and electrical conduction performance after connection, and has the characteristics of long service life.

Claims (6)

1, a kind of high density is hanged down the type printed circuit connector, this connector (10) has the insulating body (20) of band inserting groove (22), inserting groove (22) both sides have corresponding with the offside respectively conducting strip mounting groove of plurality of conducting strips mounting groove (21) and its corresponding, described each mounting groove (21) upper inner has a grade muscle (24) and separator disc (23) is arranged at the bottom, inserting groove (22) two side has the conducting strip contact arm to stretch out groove to be communicated with described mounting groove (21), it is characterized in that, be equipped with conducting strip (30) or (70) of band cantilever-type elastic contact arm (39) or (76) in the described conducting strip mounting groove (21), elastic clip folding formula end fixator (60) or (80) is equipped with through installing hole (25) or (27) in insulating body (20) two ends, and middle fixture (90) is equipped with through installing hole (26) in its middle part.

2, the low type printed circuit connector of high density according to claim 1, it is characterized in that, two jig arm (62) of stretching on the base portion (61) of described end fixator (60) has, there is convex clamping section (63) inboard, two jig arm (62) upper ends of stretching out insulating body (20) end face, has the base portion (61) of the protruding thorn of projection (69) and both sides (64) to have by stretching leading that secondary foot (67) constitutes under two and supports element (65).

3, according to the low type printed circuit connector of claim 1,2 described high density, it is characterized in that between the two secondary foots (67) of described end fixator (60) bent pin (66) being arranged, have end jig arm (68) be positioned at two jig arm (62) with and be positioned at its outside.

4, the low type printed circuit connector of high density according to claim 1 is characterized in that, the structure of described middle fixture (90) is that base portion (91) has two foots of stretching down (92), and the protruding thorn of protuberance (93) and both sides (94) is arranged on this base portion (91).

5, the low type printed circuit connector of high density according to claim 1, it is characterized in that, the structure of described conducting strip (30) is to have the both sides of the base portion (32) of the pin (31) that stretches out body (20) down that blocking salient point (33) (34) is arranged, and the elastic cantilever formula contact arm of stretching on the base portion (32) (39) successively by arc portion (36), anti-arc portion (35), crank arm (37), have the cantilever (312) of infolding end (311) to constitute, be provided with left salient point (313) and right salient point (314) at contact arm (39) epimere.

6, the low type printed circuit connector of high density according to claim 1, it is characterized in that, the structure of described conducting strip (70) is, the pin (71) that stretches out insulating body (20) bottom is arranged and has stretched portion (72) upper end (741) of protruding thorn (73) that arc portion (74), straight portion (742), crank arm (75) are arranged successively, has the cantilever type elastic contact arm (76) of conflict end (78) and protuberance (77).

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