JPH073586Y2 - Memory card connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a memory card connector, and more particularly to a multipolar memory card connector having a large number of contacts.

[Prior Art] A conventional memory card connector (hereinafter referred to as a connector) and a memory card using the connector (hereinafter referred to as a card) are shown in FIGS. 5 and 6.

In this connector A, a large number of contact pieces 110 projecting in parallel from the body 100 are housed in a mutual space of a large number of ribs 120 ... Formed in the body 100 to prevent contact between the contact pieces 110, and Attach the tip of the contact piece 110 to the support 130 of the body 100.
The contact piece 110 is preloaded by being locked. Further, in the card B using this connector A, contacts B ₁ are arranged in parallel at appropriate places on the upper surface thereof, and by inserting the card B into the connector A, the contact 111 bent in the vicinity of the tip of the contact piece 110 is formed. It is designed to contact the contact B ₁ on the card B side.

On the other hand, in recent years, wiring boards on which connectors are mounted and devices on which connectors are mounted are required to increase the mounting density and mounting density of various components including the connectors to reduce the overall thickness and thus the size. ing.

[Problems to be Solved by the Invention] However, since the conventional connector A has a structure in which the card B is inserted between the ribs 120 and the support plate portion 102 that supports the lower surface of the card B, the support plate portion thereof is provided. It is indispensable to form a space between the rib 102 and the rib 120 to the extent of the total thickness of the card B. Therefore, the connector A has to be relatively bulky under the influence of the thickness of the card B, and there is a problem that the promotion of the thinning of the connector A is restricted by the thickness of the card B.

The present invention has been made in view of the above problems, and an object thereof is to provide a connector whose thinning is not restricted by the thickness of a card.

[Means for Solving the Problems] The connector of the present invention is used for a card in which a large number of holes open at the front end surface are arranged in parallel, and contacts are formed below the inner wall surface of these holes. The characteristic is that a support plate portion that supports the lower surface of the memory card is provided on the body in a protruding manner, and a large number of contact pieces are juxtaposed along the support plate portion from the body in a juxtaposed state. Is formed with a curved piece portion protruding toward the support plate portion side, a contact corresponding to the memory card side contact is formed on the top of the curved piece portion, and each contact piece of the contact piece is formed on the support plate portion. A large number of concave portions corresponding to each of the curved pieces are arranged side by side,
Both wall surfaces located in the width direction of the contact piece in the recessed portion are inclined so that the mutual interval becomes narrower as they approach the bottom of the recessed portion, and the contact piece has the contact of the curved piece portion corresponding thereto. Preload is applied so that it fits into the recessed portion, and the contact of the curved piece fits into the recessed portion, and the tip of the curved piece is larger than the thickness of the opening edge lower part of the hole of the memory card above the support plate It is configured to be located away from.

[Operation] In this configuration, when the card is slid and inserted on the support plate, the curved piece rides on the lower part of the opening peripheral edge of the hole opened at the front end surface of the card against the preload of the contact piece. After going up, it is inserted into the hole and the contact of the curved piece makes elastic contact with the contact on the card side.

When the curved piece of the contact piece is pulled out from the hole by retracting the card, the curved piece portion is displaced toward the support plate portion side by the preload of the contact piece, and the contact fits into the recessed portion. At that time, since the mutual distance between the two wall surfaces of the recessed portion located in the width direction of the contact piece is inclined so that it becomes narrower toward the bottom of the recessed portion, the wall surface guides the curved piece into the recessed portion. Function as.

[Embodiment] FIG. 1 is a partially cutaway perspective view showing a connector A according to an embodiment of the present invention and a card B used in the connector A, FIG. 2 is a front view of the connector A, and FIG. 4A to 4C are sectional views in which a portion corresponding to the portion X in the drawing is enlarged, and FIGS.

The connector A is provided with a body 1, guide portions 2 protruding from both ends of the body 1 in the width direction, a support plate portion 3 protruding from a lower end portion of the body 1, and an upper end portion of the body 1. The upper plate portion 4 and the upper plate portion 4 are integrally formed of synthetic resin. The guide 2 is provided with a guide groove 21 for guiding the insertion / removal of the card B, and between the support plate portion 3 and the upper plate portion 4. An accommodation space S for the card B is formed.

A large number of contact pieces 5 and contact pieces 6 having a spring property are alternately held in parallel in the body 1, and the contact pieces 5 and 6 are projected from the body 1 along the support plate portion 3. . Figure 4A ~
As shown in FIG. 4C, curved pieces 51, 61 each having a shape projecting toward the support plate 3 side are formed at the tips of the contact pieces 5, 6, and the curved pieces 51, 61 are formed. The contacts 52 and 62 are formed on the top of 61, and the curved piece 51 of one contact piece 5 is formed.
The contact 52 and the curved piece portion 61 of the contact piece 6 on the other side and the contact 62 thereof are displaced in the front-rear direction. 53,63
Is a terminal formed on each of the contact pieces 5 and 6, which projects from the body 1 and is connected to a circuit (not shown).

On the other hand, a large number of fine grooves 8 are arranged in parallel on the inner surface of the support plate portion 3. These narrow grooves 8 are provided separately corresponding to the curved piece portions 51, 61 of the contact pieces 5, 6. And each of the above-mentioned contact pieces
Pre-loads are given to 5 and 6 so that the contacts 52 and 62 of the curved piece portions 51 and 61 are fitted inside the corresponding narrow grooves 8. As a means for imparting such a preload, in the illustrated example, a means for slightly bending the middle portions of the contact pieces 5, 6 into a V-shape is adopted. Further, as shown in FIG. 3, the groove wall surfaces 81, 81 on both sides of the narrow groove 8 are inclined so that the mutual distance between them becomes narrower toward the bottom of the narrow groove 8. That is, the two groove wall surfaces 81, 81 are inclined so as to open upward in the figure. The narrow groove 8 is an example of the recessed portion of the present invention, and the groove wall surfaces 81, 81 are examples of both wall surfaces located in the width direction of the contact pieces 5, 6 in the recessed portion. Therefore, instead of the narrow groove 8, for example, a round or elliptical mortar-shaped hole may be provided.

Next, the card B will be described.

As shown in FIG. 1, the card B is provided with a large number of hole portions 9 having an opening 91 on the front end surface thereof. Even if each hole 9 is formed by a slit opened on the upper surface slightly entering from the front edge of the card B and a through hole communicating with the slit and opened on the front surface as shown in the figure, the entire slit 9 is a slit. Or it may be entirely formed of holes, and all of them are included in the concept of the hole portion 9. Such a hole 9 has a lower inner wall surface as shown in FIGS. 4A to 4C.
The contacts 93, 94 are formed on the 92 in a state of being displaced in the front-back direction. The displacement width is the same as the displacement width of the contacts 52, 62 on the connector side described above, and the positions of the contacts 93, 94 on the card side are such that the card B is accommodated in the card of the connector A as shown in FIG. 4C. The contacts 52 and 62 on the connector side are in contact with each other when completely inserted into the space S. Further, the thickness of the lower portion of the peripheral edge of the opening 81 in the hole portion 9, that is, the lower portion of the opening edge portion 95 of the hole portion 9 is extremely thin. That is, the thickness of the opening peripheral edge portion 95 is such that the tips of the curved piece portions 51, 61 and the support plate portion 3 in the state where the contacts 52, 62 of the curved piece portions 51, 61 described above are fitted in the narrow grooves 8. It is made thinner than the interval H (see FIG. 3) between the and. In other words, the tips of the curved piece portions 51, 61 are located farther from the support plate portion 3 than the thickness of the opening edge lower portion 95. In addition, in the illustrated example, contacts 93 and 94 on the card B side
Is formed on the wiring board P forming a part of the card B, but it is not always necessary to form the contacts 93, 94 on the wiring board P, and a hole is formed in the body portion of the card B. A contact may be formed below the inner wall surface of the hole.

According to the above connector A, the curved pieces 51, 61 of the contacts 5, 6 are such that their contacts 52, 62 are fitted in the respective narrow grooves 8, 8 as shown in FIG. It is in the normal position. From this state, when the card B is slid on the support plate 3 and inserted into the card storage space S, the opening edge lower part 95 of the card B is contacted with one of the contact pieces at the first stage as shown in FIG. 4A. Curved piece of 5
The curved piece portion 51 is inserted into the gap between the support plate portion 3 and the support plate portion 3, and then the curved piece portion 51 rides up on the lower portion 95 of the opening edge as shown in FIG. 4B, and then the curved piece portion 51 is inserted into the hole 9. When the card B is further inserted, the curved piece portion 61 of the other contact piece 6 performs the same operation to enter the hole portion 9, and the card B is completely inserted into the accommodation space S as shown in FIG. 4C. When inserted, the contacts 52,62 on each curved piece 51,61 will
It will be in contact with 3,84.

When the contacts 52, 62 of the curved pieces 51, 61 are in elastic contact with the contacts 93, 84 on the card side, since the lower surface of the card B is supported by the support plate portion 3, the inner wall surface of the hole 9 is formed. Even if the lower part is made thin, it will not bend.

When the card is inserted, the curved piece portions 51, 61 of the contact pieces 5, 6 are positioned by the narrow grooves 8, 8 until the curved piece portions 51, 61 ride on the opening edge lower portion 95 of the hole 9 in the card B, and the opening edge lower portion 95.
After getting on the vehicle, it will be positioned in the hole 9
A situation in which the curved piece portions 51, 61 contact each other does not occur. Therefore, the contact piece can be highly densified even though it is not a structure in which almost the entire length of the contact piece is partitioned by the rib 120 as in the conventional example described in FIG. When the card B is completely inserted, the lower part of the inner wall surface of the hole 9 in the card B is sandwiched by the support plate 3 and the curved pieces 51, 61 of the contact pieces 5, 6 or the contacts 52, 62. ,
In that state, the contacts 52, 62 on the connector side elastically contact the contacts 93, 94 on the card side. Since the thickness of the lower portion of the inner wall surface of the hole 9 provided in the card B only affects such contact between the contacts, and the overall thickness of the card B has nothing to do with it, as shown in FIG. Compared with the conventional connector B of the type in which the contact 111 of the contact piece 110 is elastically contacted with the contact B ₁ formed on the upper surface of B from above, the overall thickness can be easily reduced.

Next, when the card B is retracted and the curved piece portions 51 and 61 are pulled out from the hole portion 9, the curved piece portions 51 and 61 are supported by the preloads given to the contact pieces 5 and 6, and the supporting plate portion 3 side. , And their contacts 52 and 62 correspond to the narrow grooves, respectively.
Fits in 8,8. At that time, the groove wall surfaces 81, 81 of the narrow groove 8 are curved piece portions.
Since it functions as a guide for bringing 51 and 61 into the narrow groove 8,
Even if the curved piece portions 51, 61 are slightly displaced with respect to the corresponding narrow grooves 8, 8, each curved piece portion 51, 61 is guided by the groove wall surfaces 81, 81 to be reliably positioned at the regular position. It Therefore, even if the contact pieces 5, 6 are arranged side by side with high density, the contact pieces 5, 6 are reliably prevented from contacting each other.

Although the connector A having the upper plate portion 4 has been described in this embodiment, the upper plate portion 4 is not essential. Also, the contact piece
The curved piece portions 51, 61 of 5, 6 may have any shape as long as they can form the contacts 52, 62 and can ride on the lower portion 95 of the opening edge on the card B side. It may be arcuate.

According to the present invention, the lower part of the inner wall surface of the hole on the card side is sandwiched by the support plate and the curved piece of the contact piece, and in that state, the contact of the curved piece contacts the contact on the card side. When the connector is thinned, the thickness of the lower portion of the inner wall surface only affects it, and the overall thickness of the card does not restrict the thinning of the connector. Since it is easy to reduce the thickness of the lower portion of the inner wall surface, according to the present invention, it is possible to easily promote the thinning of the connector. In addition, the connector of the present invention has a structure in which the lower surface of the card is supported by the supporting plate portion protruding from the body, so even if the lower portion of the inner wall is thinned, it is backed up by the supporting plate portion. There is also an effect that the lower part of the inner wall surface is less likely to bend.

Further, since the wall surface of the recessed portion juxtaposed on the support plate portion has a function of attracting the curved piece portion that has come out of the recessed portion to the recessed portion, even if the card is repeatedly inserted and removed, the curved portion of each contact piece is curved. The pieces are surely called into the corresponding recessed portions, and when the card is not inserted, the contacts of the curved pieces are fitted into the recessed portions and positioned reliably. Therefore, even if the contact pieces are arranged in high density side by side, the contact function between the contact pieces is surely prevented due to the function of drawing the wall surface of the recessed portion, and thereby the contact density is also promoted.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a connector according to an embodiment of the present invention and a card used for the connector, FIG. 2 is a front view of the connector, and FIG. 3 is a portion corresponding to the portion X in FIG. FIG. 4A to FIG. 4C are explanatory views of the operation, FIG. 5 is a partially cutaway schematic side view showing a conventional connector and a card used therefor, and FIG. 6 is a VI-VI of FIG. It is a line sectional view. A ... Connector, B ... Card, 1 ... Body, 3 ... Support plate part, 5,6 ... Contact piece, 8 ... Fine groove (recessed part), 9 ... Hole part, 51, 61
… Bending pieces, 52,62… Contacts on the connector side, 81… Groove wall surfaces (both wall surfaces located in the width direction of the contact piece in the recessed portion), 93,94… Contacts, 95… Under the opening edge of the hole.

Claims (1)

[Scope of utility model registration request] 1. A memory card connector for use in a memory card in which a large number of holes open at the front end surface are arranged side by side, and contacts are formed on the lower part of the inner wall surface of the holes, and the lower surface of the memory card is attached to the body. A supporting plate portion for supporting is provided in a protruding manner, and a plurality of contact pieces are juxtaposed along the supporting plate portion from the body in a juxtaposed state, and a curved piece of a shape protruding to the supporting plate portion side at the tip of the contact piece. In addition to the formation of the curved portion, a contact corresponding to the contact on the memory card side is formed on the top of the curved piece, and a large number of concave portions corresponding to the curved piece of each contact piece are arranged on the support plate. The two wall surfaces of the contact piece in the recessed portion that are located in the width direction are inclined so that the mutual spacing becomes narrower toward the bottom of the recessed portion, and the contact piece has the contact of the curved piece portion. Fit into the corresponding recess Preload is applied so that the tip of the curved piece is located farther from the supporting plate than the thickness of the opening edge of the hole of the memory card when the contact of the curved piece is fitted in the recess. A memory card connector, which is configured to.