JP3937866B2 - Memory card socket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a memory card socket for connecting a memory card and a circuit board.
[0002]
[Prior art]
As this type of memory card socket, there is one mounted on a small electronic device such as a cellular phone as shown in FIGS. FIG. 5 is a perspective view showing the relationship between the memory card and the memory card socket, FIG. 6 is an exploded perspective view showing the memory card socket, and FIG. 7A is a main part showing the vicinity of the front end side of the write prevention detection contact. FIG. 2B is an enlarged view of the main part showing a state where the shell is removed.
[0003]
The memory card socket 1 is used for, for example, a memory card 2 as an SD (Secure Digital) memory. The memory card socket 1 is inserted into and removed from the memory card 2 and contacts a connection terminal provided on the memory card 2. A housing 3 holding the contacts 4 and a slider 5 that slides relative to the housing 3 when the memory card 2 is inserted and removed. The housing 3 includes a body 6 and a shell 7. A memory card 2 is inserted between them.
[0004]
As shown in FIG. 5, the memory card 2 is a synthetic resin molded product having a substantially flat rectangular shape on the outer periphery, and has an inclined surface portion 21 formed by cutting out the upper right corner in FIG. Further, the memory card 2 is formed of a synthetic resin molded product having a concave portion 22 formed on the outer surface on one end side, and a convex shape toward the outer side on one end side that can slide between the two positions 22a and 22b in the concave portion 22. A write prevention lever 23 is provided. As will be described in detail later, when the write prevention lever 23 is set at the write prevention position 22a, writing / erasing of information to the memory card 2 is prevented and the memory card 2 stores the information. When the information is protected and, on the other hand, the write prevention lever 23 is set at the write permission position 22b, the information stored in the memory card 2 is permitted by writing / erasing information to the memory card 2. Has been updated. Further, the memory card 2 is provided with a plurality of connection terminals on the back surface for connecting to the plurality of contacts 4.
[0005]
The body 6 is made of a synthetic resin molded product, and has a rectangular flat plate-like base plate 62 facing a part of the back surface of the memory card 2. A pair of arms 61a and 61b extending to one side along the side edges at both ends in the longitudinal direction of the base plate 62 are provided integrally with the base plate 62, and the base plate 62 and the arms 61a and 61b are formed in a U shape as a whole. Is formed. The arms 61a and 61b and the base plate 62 share one side edge, and a rear plate 63 is erected on the side edge of the base plate on the paper surface side (hereinafter, the upper surface side) in FIG. A side plate 64a is erected on the right side edge of the right arm 61a in FIG. 6, and a side plate 64b is erected on the left side edge of the left arm 61b in FIG.
[0006]
The shell 7 has a substantially U-shaped cross section and is coupled to the body 6 so as to overlap the side plates 64a and 64b from the outside. Card guides 65a and 65b are provided on the left side edge of the arm 61a and the right side edge of the arm 61b to restrict the movement of the memory card 2 in the horizontal direction in the figure. Slide along the guides 65a and 65b. The front ends of the card guides 65a and 65b (the lower direction in FIG. 6 is the forward direction) are inclined so as to increase both the left and right widths between the card guides 65a and 65b and the distance to the shell 7 toward the front. Card introduction portions 66a and 66b are provided. When the memory card 2 is inserted between the body 6 and the shell 7, the memory card 2 is guided by the card introduction portions 66a and 66b, so that the insertion operation of the memory card 2 is facilitated.
[0007]
The base plate 62 holds a plurality of (9) contacts 4 that respectively contact a plurality of connection terminals provided on the memory card 2. One end of each contact 4 extends along the arms 61 a and 61 b to a position where it does not overlap with the base plate 62.
[0008]
The slider 5 is placed on the arm 61a, and the slider 5 is movable in the front-rear direction between the card guide 65a and the side plate 64a. The slider 5 includes the slider body 51 and the memory card 2. And a contact portion 52 that contacts the front surface. The moving direction of the slider 5 is restricted by the card guide 65a, the side plate 64a, the shell 7 and the arm 61a, and the position where the memory card 2 is inserted into the housing and the connection terminal of the memory card 2 contacts the contact 4 and the memory card. The slider 5 slides between the position where 2 can be removed from the housing 3. A coil spring 8 that urges the slider 5 forward is placed on the front side of the end of the rear plate 63 on the arm 61a side.
[0009]
The arm 61b has a card detection contact 91, a write-protection detection contact 92, and an NC terminal 93 that exchanges control signals that enable writing / erasing of information on the memory card 2, all made of a conductive metal plate. Is fixed.
[0010]
The card detection contact 91 detects whether or not the memory card 2 is installed. One end of the card detection contact 91 is a fixed terminal 91a that contacts the write prevention detection contact 92, and the other end 91d is when the memory card 2 is not installed. It is in contact with the NC terminal 93. When the memory card 2 is inserted, the memory card 2 comes into contact with 91c, the other end 91d and the NC terminal 93 are opened, and it is detected that the memory card 2 is installed.
[0011]
The write prevention detection contact 92 detects the slide position of the write prevention lever 23. The base end side 92a is connected to the arm 61b and has an elastically deformable elastic deformable portion 92b having a predetermined length. A memory card contact portion 92c and a movable terminal 92d that are in contact with and away from the card detection contact 91 are integrally provided from the front end side of the elastic deformation portion 92b.
[0012]
The memory card socket 1 is loaded with a memory card 2 as follows. The memory card 2 is gradually inserted into the housing 3 from the lower left side of the housing 3 with the inclined surface portion 21 of the memory card 2 in the upper right in FIG. When the inclined surface portion 21 contacts the contact portion 52, the contact portion 52 is pushed by the inclined surface portion 21 and the slider 5 slides with respect to the housing 3. When the memory card 2 reaches the mounting position, the connection terminal is connected to the plurality of contacts 4, and the information of the memory card 2 is relayed from the connection terminal to the memory card socket 1 and sent to the electronic device. is there.
[0013]
As shown in FIG. 7, when the memory card 2 in which the write prevention lever 23 is set at the write permission position 22b is loaded, the memory card contact portion 92c contacts the write prevention lever convex portion 23a. In contact therewith, the movable terminal 92d is separated from the fixed terminal 91a. As a result, writing / erasing of information to / from the memory card 2 is permitted, and information stored in the memory card 2 can be updated. On the other hand, when the memory card 2 in which the write prevention lever 23 is set at the write prevention position 22a is attached, the movable terminal 92d is in contact with the fixed terminal 91a, so that information is written to the memory card 2. The information stored in the memory card 2 is protected by preventing the insertion / deletion.
[0014]
[Problems to be solved by the invention]
In the memory card socket 1 described above, the write prevention lever 23 can be easily slid between the two positions 22a and 22b in the recess 22 so that the write prevention lever 23 has the write prevention lever recesses 23b and 23b. And a groove portion 24 is formed between the concave portion 22 and the write prevention lever convex portion 23a, and a thin piece or the like can be inserted and slid into this portion.
[0015]
However, when the memory card contact portion 92c slides in the groove portion 24 with the insertion / extraction of the memory card 2, the memory card contact portion 92c fits into this portion, and the memory card 2 or the write prevention lever 23 is ground. It was easy. As a result, there is a concern that the memory card 2 cannot be mounted smoothly or that a large amount of wear powder is generated and collected in the groove 24.
[0016]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a memory card socket in which the memory card 2 can be smoothly inserted when the memory card 2 is inserted and removed. is there.
[0017]
[Means for Solving the Problems]
A memory card socket according to a first aspect of the present invention includes a housing having a plurality of contacts and having a hollow, substantially flat plate shape with one opening, and one end fixed to the housing and the other end in contact with a movable terminal. A fixed terminal, an elastically deformable elastically deformable portion having a predetermined length connected to the housing on the base end side, a memory card contact portion integrally provided from the distal end side of the elastically deformable portion, and the fixed terminal A writing prevention detection contact having a movable terminal that contacts and separates, a concave formed on the outer surface of one end side, and a writing having a convex shape toward the outer side of one end slidable between two positions in the concave portion A memory card having a connection plate that contacts the contact prevention lever and the contact and having a substantially flat rectangular shape is inserted into and removed from the housing, and the fixed terminal is connected to and separated from the movable terminal. Sending a control signal for detecting the slide position of the insertion prevention lever and enabling writing / erasing of information of the memory card loaded in the housing, the write prevention detection contact is the memory card contact portion In the memory card socket, the elastic deformation portion is elastically deformed by a pressing force abutting against the write prevention lever so that the movable terminal contacts and separates from the fixed terminal. The write prevention detection contact is the memory card. The amount of elastic deformation that reduces the amount of elastic deformation of the elastic deformation portion when the memory card contact portion slides in the groove portion between the concave portion of the memory card and the convex portion of the write prevention lever as the card is inserted and removed. have a reduced structure, the elastic deformation amount reducing structure, the length of the memory card contact portion, wherein a long substantially linear portion than the width of the groove, the elastic deformation amount reduced The curvature of the contact portion guide provided in the vicinity of the memory card contact portion is smaller than the curvature of the memory card contact portion, and the contact portion guide is connected to the memory card contact portion from the distal end side of the elastic deformation portion. together they are integrally formed by sharing a connection portion, between the contact portion guide and the memory card contacting portion is characterized that you have the presence of a predetermined space.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Since the basic configuration of the present embodiment is the same as that described in the prior art, parts having substantially the same basic functions are denoted by the same reference numerals, and details of common parts are detailed. The detailed explanation is omitted.
[0023]
A memory card socket 1 according to the present invention includes a housing 3 that holds a plurality of contacts 4 and has a hollow, substantially flat plate shape with an opening on one surface, one end fixed to the housing 3 and the other end being movable toward and away from a movable terminal 92d. An elastically deformable elastic deformable portion 92b having a predetermined length with a fixed terminal 91a and a base end side 92a connected to the housing 3, and a memory card integrally connected from the distal end side of the elastic deformable portion 92b A write prevention detection contact 92 having a contact portion 92c and a movable terminal 92d that is in contact with and away from the fixed terminal 91a, and a recess 22 formed on an outer surface on one end side and between two positions 22a, 22b in the recess 22 A memory card having a substantially flat rectangular shape having a write-proof lever 23 having a convex shape outwardly slidable at one end and a connection terminal in contact with the contact 4 2 is inserted into and removed from the housing 3, and the fixed terminal 91 a detects the slide position of the write prevention lever 23 based on the contact and separation of the movable terminal 92 d and the memory card 2 loaded in the housing 3. A control signal for enabling writing / erasing of information is transmitted, and the write prevention detection contact 92 receives the pressing force with which the memory card contact portion 92c abuts against the write prevention lever 23 to receive the elastic deformation portion 92b. It is assumed that the movable terminal 92d comes into contact with and separates from the fixed terminal 91a due to elastic deformation.
[0024]
Hereafter, the characteristic part of this invention is demonstrated using FIG.1 and FIG.2. FIG. 1A is a plan view of the main part in the vicinity of the write prevention detection contact 92 which is a characteristic part of the memory card socket 1 according to the present invention, and FIG. 1B is a top view of the write prevention detection contact 92. FIG. 3C is a plan view of the main part showing a state where the shell is removed. 2A is a plan view of the main part in the vicinity of the write prevention detection contact 92, which is a characteristic part of the memory card socket 1 according to the present invention, and FIG. 2B is a top view of the write prevention detection contact 92. It is.
[0025]
The write prevention detection contact 92 is elastic when the memory card contact portion 92c slides in the groove portion 24 between the concave portion 22 of the memory card 2 and the write prevention lever convex portion 23a as the memory card 2 is inserted and removed. It has an elastic deformation amount reducing structure that reduces the elastic deformation amount of the deforming portion 92b.
[0026]
In the elastic deformation amount reducing structure, the curvature of the contact portion guide 92e provided in the vicinity of the memory card contact portion 92c is smaller than the curvature of the memory card contact portion. The contact portion guide 92e is formed integrally from the distal end side of the elastic deformation portion 92b, sharing the connection portion with the memory card contact portion 92c, and between the contact portion guide 92e and the memory card contact portion 92c. Has a predetermined space. More specifically, the leading end of the write-protection detection contact 92 is divided into two by inserting a slit at the substantially central portion of the memory card contact portion 92c having a substantially semicircular cross section, and one of them easily gets over the groove portion 24. The contact portion guide 92e is formed in a gently raised shape, and the other is formed in a substantially semicircular shape in cross section, and its tip is used as a movable terminal 92d. Further, the memory card contact portion 92 c and the contact portion guide 92 e are provided with a chamfered portion 92 f on an end surface that contacts the memory card 2 or the write prevention lever 23.
[0027]
According to the above configuration, when the groove portion 24 passes the memory card contact portion 92c, it can be easily overcome by the contact portion guide 92e, so that the elastic deformation amount of the elastic deformation portion 92b is reduced. As a result, the contact pressure between the write prevention detection contact 92 and the memory card 2 and the write prevention lever protrusion 23a can be reduced, so that the memory card 2 can be mounted smoothly. Moreover, since the chamfered portion 92f is provided, generation of wear powder can be suppressed. Further, since the contact portion guide 92e is formed integrally with the write prevention detection contact 92, the number of parts does not increase.
[0028]
Note that the elastic deformation amount reducing structure of the write prevention detection contact 92 described above can also be used for the card detection contact 91 having substantially the same shape. In this case, when the edge of the memory card 2 comes into contact with the card detection contact 91, it can be smoothly mounted, and the generation of wear powder can be suppressed.
[0029]
Although the embodiment of the memory card socket 1 has been described above, the write-protection detection contact 92 can be variously modified, and for example, can have a shape shown in FIGS.
[0030]
3A is a plan view of the main part in the vicinity of the write prevention detection contact 92, FIG. 3B is a top view of the write prevention detection contact 92, and FIG. 3C is a main part showing a state where the shell is removed. It is a top view. 4A is a plan view of the main part in the vicinity of the write prevention detection contact 92, and FIG. 4B is a top view of the write prevention detection contact 92. FIG.
[0031]
This write prevention detection contact 92 is different from that according to the above-described embodiment in that the elastic deformation reduction structure has a length of the memory card contact portion 92c as a substantially linear shape portion longer than the width of the groove portion 24. It is different. Specifically, the write-protection detection contact 92 has a slit at the front end side of the elastic deformation portion 92b, which is divided into two parts, one being a memory card contact portion 92c and the other being a movable terminal 92d to be in contact with the fixed terminal 91a. I try to let them. The tip end side of the write prevention detection contact 92 has a substantially trapezoidal cross section and gently raises its tip, and is approximately 0.15 mm longer than the width of the groove 24 (about 0.5 mm), and is approximately 0.65 mm long. A linear shape portion is provided as a memory card contact portion 92c. Further, the memory card contact portion 92 c is provided with a chamfered portion 92 f on the end surface that contacts the memory card 2 or the write prevention lever 23.
[0032]
According to the above configuration, when the groove portion 24 passes through the memory card contact portion 92c, the memory card contact portion 92c does not fall into the groove portion 24, so that the memory card 2 can be mounted more smoothly. Moreover, since the chamfered portion 92f is provided, generation of wear powder can be suppressed. Further, since the memory card contact portion 92c and the movable terminal 92d are integrally formed on the tip end side of the write prevention detection contact 92, the number of parts does not increase. Further, since the width of the memory card contact portion 92c is narrowed, this portion is easily elastically deformed. Therefore, when the memory card 2 is mounted, the memory card contact portion 92c is in contact with the memory card 2 and the write prevention lever protrusion 23a. The pressure can be reduced.
[0033]
【The invention's effect】
In the memory card socket according to the first aspect of the present invention, the write prevention detection contact has an elastic deformation amount reducing structure for reducing the elastic deformation amount of the elastic deformation portion. The contact pressure at which the write prevention detection contact contacts the memory card and the write prevention lever convex portion can be reduced.
[0034]
In the memory card socket according to the first aspect of the present invention , since the elastic deformation amount reducing structure has a substantially linear shape portion in which the length of the memory card contact portion is longer than the width of the groove portion, the memory card contact portion falls into the groove portion. There will be nothing.
[0035]
In the memory card socket according to the first aspect of the present invention, the elastic deformation reduction structure is such that the curvature of the contact portion guide provided in the vicinity of the memory card contact portion in a side view is smaller than the curvature of the memory card contact portion. Therefore, it will be possible to easily get over the groove.
[0036]
In the memory card socket according to the first aspect of the present invention , since the contact portion guide is integrally formed by sharing the memory card contact portion and the connecting portion from the distal end side of the elastic deformation portion, the contact portion guide is provided. However, the number of parts does not increase.
[0037]
A memory card socket according to a second aspect of the present invention is the memory card socket according to the first aspect, wherein the memory card contact portion is provided with a chamfered portion on an end surface that contacts the memory card or the write prevention lever. Occurrence of this is suppressed.
[Brief description of the drawings]
FIG. 1A is a plan view of an essential part in the vicinity of a write prevention detection contact, which is a characteristic part of a memory card socket according to the present invention.
(B) It is a top view of the write-protection detection contact same as the above.
(C) It is a principal part top view which shows the state which removed the shell.
FIG. 2A is a plan view of an essential part in the vicinity of a write prevention detection contact, which is a characteristic part of a memory card socket according to the present invention.
(B) It is a top view of the write-protection detection contact same as the above.
FIG. 3A is a plan view of an essential part in the vicinity of a write prevention detection contact which is a characteristic part of another embodiment of the memory card socket according to the present invention.
(B) It is a top view of the write-protection detection contact same as the above.
(C) It is a principal part top view which shows the state which removed the shell.
FIG. 4A is a plan view of an essential part in the vicinity of a write prevention detection contact which is a characteristic part of another embodiment of the memory card socket according to the present invention.
(B) It is a top view of the write-protection detection contact same as the above.
FIG. 5 is a perspective view showing a relationship between a memory card and a memory card socket.
FIG. 6 is an exploded perspective view showing a memory card socket.
FIG. 7A is a plan view of a principal part in the vicinity of a write prevention detection contact of a conventional memory card socket.
(B) It is a principal part top view which shows the state which removed the shell.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Memory card socket 2 Memory card 22 Memory card recessed part 23 Write prevention lever 23a Write prevention lever convex part 3 Housing 4 Contact 91a Fixed terminal 92 Write prevention detection contact 92b Elastic deformation part 92c Memory card contact part 92d Movable terminal 92e Contact guide (elastic deformation reduction structure)
92f Chamfer

Claims (2)

A hollow substantially flat plate-like housing that holds a plurality of contacts and has an opening on one side, a fixed terminal that is fixed to the housing at one end and in contact with the movable terminal, and a base end that is connected to the housing at a predetermined end. An elastically deformable elastic part having a length of 1 mm, a memory card contact part integrally provided continuously from the front end side of the elastically deformable part, and a write prevention detection contact having a movable terminal contacting and separating from the fixed terminal A recess formed on the outer surface of the one end side, a write prevention lever having a convex shape toward the outer side of the one end slidable between two positions in the recess, and a connection terminal that contacts the contact. A memory card having a substantially flat rectangular shape is inserted into and removed from the housing, and the fixed terminal detects the sliding position of the write prevention lever on the basis of contact with and separation from the movable terminal to detect the housing card. A control signal that enables writing / erasing of information in the memory card loaded in the memory card, and the write prevention detection contact receives a pressing force at which the memory card contact portion contacts the write prevention lever. In the memory card socket, wherein the elastically deforming portion is elastically deformed and the movable terminal is in contact with or separated from the fixed terminal,
When the memory card contact portion slides in a groove between the concave portion of the memory card and the convex portion of the write prevention lever, the elastic deformation of the write prevention detection contact is caused when the memory card is inserted and removed. have a elastic deformation reducing structure for reducing the amount of elastic deformation of parts, the elastic deformation amount reducing structure, the length of the memory card contact portion, wherein a long substantially linear portion than the width of the groove, the elastic The deformation amount reducing structure is such that the curvature of the contact portion guide provided in the vicinity of the memory card contact portion is smaller than the curvature of the memory card contact portion, and the contact portion guide extends from the front end side of the elastic deformation portion to the memory card. together are integrally formed by sharing a connecting portion and the contact portion, the contact portion guide and between the memory card contacting unit socket for a memory card, characterized that you have the presence of predetermined space Door. The memory card contact portion, claim 1 memory card socket according that have a chamfered portion provided on an end surface in contact with the memory card or writing prevention lever.

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