JPS6140070Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a non-insertion/extraction force type connector, and particularly to a connector in which the terminals are arranged in high density and the size of the drive mechanism including the terminals is reduced.

As the number of terminals in a connector increases, the insertion and removal force required when mating or uncoupling each other increases, which causes inconvenience in handling and can sometimes cause accidents such as damage to the connector due to excessive force when mating or uncoupling. This may occur. Therefore, various types of so-called no-insertion/extraction-force type connectors are in use, which aim to reduce the above-mentioned insertion/extraction force as much as possible to facilitate handling and prevent accidents. These forceless insertion/extraction type connectors generally have contact contacts that are movable within a certain range, and a direction in which the contacts are brought into contact with or separated from the contacts of the mating connector, and are located integrally with or close to the contacts. Many of them are composed of a driving body that acts to drive the driving body, and an operating member such as a handle type or slider type that operates the driving body. However, with the trend toward smaller devices and faster calculations, the connectors used in devices have also become smaller, and the number of contacts has increased.As a result, the arrangement density of contacts has increased, and the signal frequency has increased. It is necessary to shorten the length of the conductive path in the section, and therefore, the height above the mounting board is also required to be as low as possible. This inevitably narrows the gap between each contact and reduces the space inside the connector, so, for example, each member necessary for the above-mentioned no-insertion/extraction-force type connector must be made smaller or thinner. This causes a problem in that it is difficult to manufacture the members, and also causes a problem in that the structural strength of each member is reduced and the reliability of the product is reduced.

The present invention was developed in view of the above-mentioned problems, and it increases the arrangement density of contacts.
Moreover, it is an object of the present invention to provide a highly reliable no-insertion/extraction-force type connector that can be configured to have a low overall dimension, particularly in height.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Figure 1 is a perspective view showing the overall configuration of the connector.
The connector is for connecting a card 20, which is also a printed circuit board, to a board 10 such as a printed circuit board, and is constructed integrally with the board 10 and the card 20, respectively. Note that FIG. 1 shows the state before the board 10 and card 20 are connected. FIG. 2 is a perspective view showing the pin contact assembly 30 and board socket contact 40 attached to the board 10, and the card socket contact 50 attached to the card 20, together with their positional relationship. Pin contact assembly 30
It consists of a pin contact 31 made of a metal round bar with a pointed end 31a formed at one end, and a drive base 32 made of an insulator or metal and integrally fixed to the other end of the pin contact. The drive base 32 has a shape that is a combination of a rectangular parallelepiped and a short cylinder, and a protrusion 33 parallel to the axial direction of the pin contact 31 is formed protruding from a surface 32a, and a short protrusion 33 is formed from a surface 32b opposite to the surface 32a. A cylindrical driven projection 34 protrudes. Since the driven protrusion 34 is fitted into a cam groove of a slider, which will be described later, and is driven while sliding on the wall surface of the cam groove, it is desirable that its cross-sectional shape be approximately circular or elliptical. Next, the board socket contact 40 is made of an elastic metal plate and has a substantially rectangular back plate part 41, a fixing part 41a extending perpendicularly to the back plate part from one short side of the back plate part, and It consists of a pair of clamping pieces 42 and 43 that protrude from both long sides in a direction opposite to the fixing part 41a. The clamping piece 4
2 and 43 are slightly biased in the direction toward each other, and as they approach the end, they are further bent into an arc shape, so that the end surfaces of each tip face each other and are in a substantially close contact state. Further, contact pieces 42a and 43a are formed by providing a U-shaped notch near the center of each surface of each holding piece 42 and 43. The contact piece 42
a, 43a are connected to the clamping pieces at the sides near the ends of the clamping pieces 42 and 43, and are bent in a direction toward each other at the sides, so that the contact pieces and the clamping pieces 42 , 43 and the horizontal cross sections thereof mutually form a circular arc to form a contact portion 44. Note that the distance between the surfaces of each piece forming this contact portion that face each other in the horizontal direction (direction parallel to the back plate portion) must be smaller than the diameter of the pin contact 31 described above. Further, by forming a protrusion 45 horizontally protruding toward the center of each of the contact pieces 42a and 43a, the contact when mated with the pin contact 31 described later becomes more reliable. Therefore, it can be said that it is desirable.
Note that the upper edges of the clamping pieces 42 and 43 (upper side in the drawing) extend from a position slightly lower than the upper short side 41b of the back plate 41, so the back plate 41 is lower than the upper short side 41b.
A flat plate portion 41c is formed in a portion from b to the upper edge line of the clamping pieces 42, 43. Next, the card socket contact 50 has a similar external shape to the above-mentioned board socket contact 40, and its plan view and front view are as shown in FIGS. 3a and 3b. , a pair of clamping pieces 52 and 53 protruding from the middle of both long sides of the back plate. Note that the holding pieces 52 and 53 are biased toward each other so that their tips are almost in close contact with each other, and the contact pieces 52a and 53a are formed by notches on each surface, and their shapes are similar to the above-mentioned board saw. Since they are similar to the clamping pieces and contact pieces in the butt contact, their explanation will be omitted. Also, the clamping piece 52,
Each end face of the upper side and lower side of 53 is the back plate part 5.
Fixing portions 51c and 51d, which are approximately rectangular in shape, are formed at the upper and lower portions of the back plate portion 51 because they are spaced from the upper and lower end surfaces 51a and 51b by approximately equal distances, respectively. Next board 1
The above-mentioned pin contact assembly 30, board socket contact 40, and others are attached to the connector 0, and the procedure for attaching them is as follows.

(See FIGS. 1 and 4 below) A circuit pattern (not shown) equal to the arrangement pitch of the contacts is formed on the upper surface 11 of the board 10, and the pin contacts 31 pass through the circuit pattern in correspondence with the pattern. A through hole 12 is provided. First, the board socket contacts 40 are placed at predetermined positions on the circuit pattern, and the fixing portions 41a are fixed by soldering to the patterns. A suitable jig is required to place each socket contact 40 in the correct position in advance, but in this case, the pin contact 31 is fitted into the socket contact 40 in advance and the pin contact is used as part of the jig. It can also be used. After soldering the socket contact 40, when the pin contact assembly 30 is inserted into the through hole 12 from the back side of the board 13, the pin contact 3
1 is introduced into the contact part 44 of the socket contact 40 by its pointed head 31a, and further the clamping piece 4
It protrudes above 2,43. pin contact 31
Since it is sufficiently elastically clamped by the contact portion 44 of the socket contact, it will not slide due to its own weight unless special force is applied. All pin contact assembly 3
0, the slider guide tube 60 is attached to the back side 13 of the board so as to cover the drive base 32 of the pin contact assembly 30. The guide tube 60 is a U-shaped insulating member with a cross section that is long enough to accommodate the drive base 32 of each pin contact assembly 30, and is fixed to the back surface 13 of the board by adhesive or other method. Slider insertion hole 61 between the back side of the board
form. A slider sliding groove 63 having a width equal to the horizontal thickness perpendicular to the axis of the slider 80 (described later) is formed on the bottom surface 62 of the guide cylinder over the entire length of the guide cylinder 60. The distance between the bottom surface 63a and the back surface 13 of the board is equal to or slightly larger than the vertical height dimension perpendicular to the axis of the slider 80. It can be freely slid in any direction and removed. Further, a plurality of guide grooves 66 are formed in the inner walls 64 and 65 of the guide tube in a direction perpendicular to the bottom surface 53. The guide grooves 66 are provided in the same number and at the same pitch as the pin contact assemblies 30 to be mounted, and have a width and inner wall surface 6 that allow the protrusions 33 of the drive base 32 to fit and slide therein.
4,65, and the inner wall surface 64,6
5 is formed over the entire length in the vertical direction. Therefore, when attaching the slider guide tube 60 to the back surface 13 of the board, first attach each pin contact assembly 30
is rotated while fitted in the socket contact 40 so that the protrusion 33 of the drive base 32 is properly aligned to face each inner wall surface 64 or 65 of the guide tube 60, and then each guide groove 66 and the above-mentioned The guide tube may be fixed to the back surface 13 of the board by adhesive or other method while aligning the respective protrusions 33 and fitting the protrusions 33 from above the guide groove 66. By attaching this guide tube 60, the pin contact assembly 30 is attached to its drive base 3.
2 is held within the guide cylinder, and its movement range is limited. Next, the board housing 70 is attached to the upper surface 11 of the board 10. The board housing 70 is a member made of an insulating material and has a substantially U-shaped cross section, and has approximately the same length as the slider guide tube 60, and is fixed at a symmetrical position with the guide tube 60 across the board 10. . The board housing 7
A peripheral wall 71 is provided to surround the entire circumference of the upper surface of the card 0, and a recess 72 is formed in the peripheral wall with a size that allows a card housing 90 attached to a card 20, which will be described later, to fit therein. A card clearance groove 73 into which the end of one side of the card 20 can fit is formed along the longitudinal center line of the bottom surface 72a of the recess 72, but the length of one side of the card 20 is normally , the housing 7 is longer than the entire length of the board housing 70 when installed.
Since a portion of the card protrudes from both ends 74 and 75 in the longitudinal direction of the card, notches 74a and 75a are formed at the ends corresponding to the extended portions of the card escape groove 73. A pin contact hole 76 through which the pin contact 31 can pass is provided in the bottom surface 72a of the recess 72 on both sides of the card relief groove 73 in parallel with its longitudinal center line. must match the pin contact through holes 12 of the card 10 in their vertical position and number. Furthermore, the bottom surface of the board housing 70 facing the board 10 is provided with a cavity 77 for receiving and receiving a board socket contact 40 fixed on the circuit pattern of the board. This space may be provided independently for each socket contact 40, or it may be a continuous long space for each row, but in either case, the socket contact 4 is provided on the top surface.
The board socket contact 40 is provided with a slit 78 having a shape that allows the flat plate part 41c of 0 to fit thereinto, and supports the flat plate part 41c.
is sufficiently held within the housing without movement even when the pin contact slides. Further, a gap 79 is provided on the lower surface of the housing between the lower edge of the side surface parallel to the longitudinal direction of the board housing 70 and the space 77, through which the fixed portion 41a of each board socket contact 40 passes. Fixed part 41a
A portion of the circuit is exposed outside the housing, but this is necessary for circuit checks, etc. It goes without saying that the space 77, slit 78, and gap 79 described above are all provided symmetrically with respect to the longitudinal center line of the board housing 70, similar to the pin contact hole 76.

Next, the drive slider 80 is a long rod-shaped member with a rectangular cross section, and is composed of a drive part 81 and a knob part 82, and the drive part 81 can freely slide inside the slider guide tube 60 and be inserted and withdrawn as described above. Since the cross-sectional dimension of the knob portion 82 is larger than that of the drive portion 81, when the slider 80 is inserted into the guide tube 60, the knob portion 82 is larger than that of the drive portion 81. The slider 80 is stopped at the position where it comes into contact with the end face of the slider 80 and does not enter the guide cylinder 60 any further. Further, when removing the slider 80, it is sufficient to hold the knob portion 82 with your fingers and apply force. Cam grooves 85 and 86 are provided on both sides 83 and 84 in the longitudinal direction of the drive section 81 of the slider 80, extending substantially over the entire length of the drive section. Since the cam grooves 85 and 86 are completely symmetrical with respect to the central axis in the longitudinal direction of the drive portion 81, only the cam groove 85 on one side surface 83 will be described here. As shown in FIGS. 1 and 5, the cam groove 85
1, a horizontal portion 85a that is parallel to the axis of the slider 80 for most of the entire length of the slider 80, a sloped portion 85b that continues from one end of the horizontal portion 85a and slopes downward, and an end portion 81a of the drive portion 81 from the end of the sloped portion. It consists of an introduction part 85c for the driven protrusion 34 which is again parallel to the axis of the slider at a short part. In addition, the cam groove 85
The vertical distance between the upper side and the lower side is slightly larger than the diameter (or maximum diameter) of the driven protrusion 34 of the pin contact assembly 30 in its entire range; In order to reduce friction as much as possible and to reduce the force for driving the slider 80 as much as possible, the height of the lower side of the horizontal portion 85a is slightly lower than the height of the lower side of the highest portion of the slope portion 85b. Further, the total length of the horizontal portion 85a needs to be longer than the total length of the pin contact arrangement portion. Further, at the opening of the introduction portion 85c to the slider end 81a, the upper side and the lower side are inclined in a direction away from each other, so that the above-mentioned driven protrusion 34 can be easily received.

Next, the card 20 is usually composed of a printed circuit board, and on one side of the card, as shown in FIG. 3B, a pattern 21 matching the arrangement pitch of the pin contacts 31 of the board 10 is formed on both sides of the card. It goes without saying that each of the patterns 21 is connected to each circuit within the card 20. The pattern 21 is formed in a rectangular shape, and the lengths of its long and short sides are slightly larger than the lengths of the corresponding sides of the back plate portion 51 of the card socket contact 50. Each card socket contact 50 is fixed to its back plate portion 51 by soldering. Each socket contact 5
0, the card housing 90 is installed so as to cover each socket contact 50. As shown in FIGS. 1 and 4, the card housing 90 consists of housing pieces 91 and 92 that are symmetrical to each other and have a U-shaped cross section. The length of each housing piece is sufficiently longer than the arrangement part of the card socket contacts 50, and a screw hole 93 is provided near both ends of each housing piece, and a screw through hole (not shown) that matches the screw hole is provided.
are provided on the card 20, and each housing piece 91 and 9
2 with the card 20 between them, and then tighten the screw 94.
The card housing 90 is formed integrally with the card 20 by passing it through the housing piece and board and securing it with a nut. Each housing piece 91, 92 accommodates the card socket contact 50 therein, but only a portion of the fixing portion 51c is exposed from the upper surface 91a, 92a. This is due to the need for circuit checks during use, as in the case of the board housing described above. However, since the screw holes 93 are provided at both ends of the housing piece, the upper surfaces 91a, 92a are higher than the intermediate portion thereof, forming stepped surfaces 91b, 92b. Also, the bottom surface 9
A plurality of through holes 91d and 92d through which the pin contacts 31 penetrate when the card 20 is fitted to the board 10 are provided in the holes 1c and 92c in the same number and at the same positions as the pin contacts 31, respectively. The overall length of the card housing 90 in the longitudinal direction and the overall width including the card 20 are such that it can fit into the recess 72 of the board housing 70.

Next, the procedure for fitting or disengaging the board 10 and card 20 is as follows. First, attach the card 20 to the board 1 on one side where the card socket contact 50 and card housing 90 are attached.
0 to face the upper surface 11 of 0. If the slider 80 is removed in advance, each pin contact 31 will be in a sufficiently lowered position, and the pointed head of the pin contact 31 will be
1a is inserted into the board housing 70 and the bottom surface 72
a is flat. This state is shown in the left half of FIG. Then, insert the card housing 90 portion containing the card 20 into the recess 7 of the board housing 70.
Insert it into 2. Next, when the slider 80 is inserted into the guide tube 60 from the end 81a side of the drive section 81, the driven protrusion 34 of the pin contact assembly 30 is inserted into the cam groove 8 due to the shape of the introduction section 85c.
5 or 86. (See Fig. 5) At this stage, the pin contact assembly 31 has not yet been raised, but the slider 80 is further moved into the guide tube 60.
When the driven protrusion 34 is advanced inwards, the driven protrusion 34 becomes the slope portion 85b.
At the same time, the pin contact 31 also rises while sliding inside the contact portion 44 of the board socket contact 40, and the pointed head 3
Through hole 91 of card housing 90 from side 1a
The contact pieces 52a, 5 of the clamping pieces 52, 53 reach the card socket contacts 50 through the contacts 52a, 52c and 92c.
It fits between 3a. In this case pin contact 31
To prevent the entire card 20 from moving away from the board 10 due to push by 2) may be engaged with the end surface of the card 20 opposite to the housing. In that case, pin contact 31 and card socket contact 50
Since the cards 20 are mated sequentially from the ends, rather than all at the same time, the force pushing up the cards 20 is small, so even with a simple structure, the cards 20 are sufficiently held without moving while the slider 80 is in operation. . As the slider 80 moves forward, the driven protrusion 34
After the pin contacts 31 are fully engaged with the card socket contacts 50, the driven projections 34 reach the horizontal portions 85a of the slider and are held in the cam grooves 85, 86. Furthermore, as described above, since the slider 80 is of a type that sequentially drives the pin contacts 31, the force required to insert the slider is small. This state is shown in the right half of FIG. When the slider 80 is fully inserted into the guide tube 60, the knob 82 comes into contact with the guide tube entrance and is stopped and held. A circuit from the board 10 to the card 20 via the board socket contact 40, pin contact 31 and card socket contact 50 is constructed. In this case, the pin contact 31 is the board socket contact 40
Since the circuit is formed after sliding with the card socket contact 50 and the card socket contact 50, a wiping action is always applied to the contact surfaces and a stable electrical contact state can be obtained. Next, when detaching the card 20 from the board 10, by holding the slider 80 by its knob 82 and pulling it outward, contrary to the above-mentioned fitting process, the driven protrusion 34 moves into the cam grooves 85, 85. and is pushed down by the slope portions 85b and 86b. Then, the pin contact 31 also descends and is first removed from the card socket contact 50, and then further descends and sinks into the board housing 70, returning to the state shown in the left half of FIG. 4. In this case as well, since the pin contacts 31 are removed in order, the force for moving the slider 80 may be small. After removing the slider 80, the card 20 can be removed by releasing the card from the locking member provided on the device.

As described above, according to the present invention, pin contacts combined with socket contacts are arranged on the board side, while socket contacts are arranged on the card side at positions facing the pin contacts on the same line. Then, by inserting the slider into the guide cylinder with the card fitted onto the board, the pin contacts will rise in order from one end of the array and will fit into the socket contacts on the card side. Since the structure is such that the card is moved in sequence and the procedure is reversed when removing it, the force required to engage or disengage the card and the board is only the force required to move the slider.Moreover, each pin contact is structured to move in sequence. Because of this, less force is required to move the slider. In addition, since pin contacts are formed so that they come into contact with each socket contact after sliding, the surface is constantly wiped and good electrical contact can be maintained. In addition, the drive contacts and their drive mechanism are mounted on both sides of the board instead of just one side, making it suitable for high frequency signals and making the shape of the connector particularly short. Not only can the surface height be lowered, but the contacts can be arranged close enough to each other to achieve high density, making it possible to reduce the overall shape of the connector without any insertion or removal force. Excellent effects can be obtained. In the above-described embodiment, the card is constructed as a printed circuit board, but it goes without saying that it can be similarly constructed as a cable such as a flat cable.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the external appearance of the contact of the present invention including the board and card, Fig. 2 is a perspective view showing the pin contact assembly and the external form and relative position of each socket contact, and Fig. 3 is a perspective view of the pin contact assembly and the external appearance and relative position of each socket contact. Figure 4 is a cross-sectional view of the entire connector including the card and board, and Figure 5 is a part of the slider and the slider's cam groove and pin contact assembly. It is a figure showing the relative position of. 10...Board, 11...Top surface of board, 12...
...Pin contact through hole, 13...Bottom surface of board,
20...Card, 30...Pin contact assembly,
31...Pin contact, 32...Drive base, 4
0... Board socket contact, 50... Card socket contact, 60... Slider guide cylinder, 80... Slider, 85, 86... Cam groove.

Claims (1)

[Scope of utility model registration request] In a connector that mates a card that also has an electric circuit to a board that is mainly a printed circuit board, a board socket contact is fixed to the top surface of the board, a through hole is provided in the board, and a drive base is fixed to one end from the bottom surface of the board. A pin contact is passed through the through hole and fitted into the board socket contact, the card socket contact is fixed to the card, and the card is inserted so that the card socket contact is on the same line as the pin contact. A slider is placed on the upper surface of the board and fixed to the lower surface of the board by sliding a slider and driving the pin contact together with the drive base through the cam groove of the slider, so that the pin contact is connected to the card socket contact. A non-insertion/extraction force type connector characterized by having a structure that allows mating or unmating.