CN201075484Y - Memory card connector - Google Patents

Abstract

A memory card connector includes an insulative housing, a plurality of conductive terminals, a pair of elastic switch terminals, a card ejection mechanism and at least one shielding shell. The pair of switch terminals includes first and second switch terminals, each having an elastic portion. The two elastic parts of the pair of switch terminals are always spaced by a distance. When the memory card is completely inserted into the card inserting space of the insulating body, a metal contact of the card withdrawing mechanism is inserted between the two elastic parts of the pair of switch terminals along with the movement to make clamping contact, so as to realize the detection of the insertion of the memory card. The shielding shell is provided with a blocking elastic sheet which is used for abutting against a half of locking elastic sheets of the card withdrawing mechanism so as to prevent the memory card from flying away from the connector in the card withdrawing process. The shielding shell is also provided with a contact piece for contacting a protruding part at the edge of the half-locking elastic sheet so as to prevent the abnormal separation of the memory card in the working state.

Description

memory card connector

technical field

The present invention relates to a memory card connector, in particular to a memory card connector with a function of detecting whether a memory card has been fully inserted and a half-lock mechanism for keeping the memory card in a half-lock state.

Background technique

In recent years, in order to increase the storage capacity of electronic devices such as mobile phones, personal digital assistants (PDAs) and digital cameras or to expand their functions, these electronic devices are generally equipped with various memory card connectors to accommodate plug-and-play devices. various types of memory cards. In addition to the two-way transmission of digital data between the memory card and the electronic device, the digital data recorded by the electronic device can also be stored in the memory card.

U.S. Patent No. 6,547,601 discloses an existing memory card connector, which includes an insulating body, a plurality of conductive terminals arranged on the insulating body, a shielding shell covering the periphery of the insulating body, and a pair of Switch terminals on one side. The shielding case is provided with a side wall and a holding part under the side wall for fixing the memory card connector and the electronic device. When the corresponding memory card is inserted into the memory card connector, the pair of switch terminals is detected to allow the signal to pass through, so that the memory card and the conductive terminal are electrically connected to carry out data transmission. Wherein, the pair of switch terminals includes an elastic terminal and a fixed terminal, and each switch terminal includes a pin portion and a conductive contact for mating contact. Wherein, the fixed terminal is integrally formed by a side wall edge of the shielding housing, and the holding portion of the side wall serves as a leg portion of the fixed terminal. When the memory card is inserted into the connector, one side of the memory card abuts against the elastic terminal, so that the elastic terminal moves outward due to pressure and contacts the fixed terminal, thereby realizing the detection function of the memory card insertion.

However, the above existing memory card connector has the following defects: 1) use the inserted memory card itself (such as the card shell) to make electrical contact with the elastic terminal that presses the switch terminal and the fixed terminal. After repeated use, the memory card It is easy to wear and tear, which affects the stable contact between the elastic terminal and the fixed terminal; 2) The elastic terminal alone bears the direct pressure of the inserted memory card, which will produce a lot of resistance. If the operation is improper, it is easier to deform the elastic terminal, which will also affect its Stability; 3) The memory card itself has certain positive/negative tolerances in the manufacturing process. When the memory card has a negative tolerance, the elastic terminal is likely to be unable to receive sufficient positive force and cannot be reliably contacted with the fixed terminal, thereby affecting the detection result of the memory card insertion; on the contrary, when the memory card has a positive tolerance, the elastic The terminal is prone to permanent deformation due to excessive deformation, so that it cannot have high reliability and durability. For the current development trend of smaller and smaller electronic devices, these defects of the above-mentioned switch terminals will become more and more obvious. For example, when the switch terminal of the above-mentioned structure is used for a smaller memory card connector, such as a Trans-flash (TF) card connector, due to the limited space of this type of memory card connector, the elastic terminal of the above-mentioned structure is in memory. When the card is inserted, it is subjected to severe stress and is prone to deformation, which affects the contact electrical properties and service life of the memory card connector. Therefore, it is necessary to improve the detection method and detection structure of the existing memory card connector to overcome the above-mentioned defects.

In addition, most of the current memory card connectors use a push-push type card ejection mechanism to facilitate the insertion and removal of the memory card. This type of card ejection mechanism mostly includes: a sliding seat installed on the side of the insulating body and can move forward and backward freely, a return spring, a guide rod, and a half lock shrapnel installed on the sliding seat, the half lock shrapnel A fitting protrusion is formed at the end. When the memory card is inserted, the concave part arranged on the side of the memory card cooperates with the matching convex part of the above-mentioned half-lock elastic piece to keep the memory card in the half-lock state.

When the above-mentioned memory card is pushed in the half-lock state, the sliding seat will overcome the elastic force of the return spring and move to the forward position. At this time, the guide rod moves along the advancing track of the cam groove provided on the sliding seat. Then, the guide rod is blocked by the cam protrusion, and the sliding seat is locked in the advanced position, thereby positioning and fixing the memory card in a readable and writable state.

When the above-mentioned memory card needs to be taken out, it is only necessary to push the memory card again. Then, the slide seat advances again, and the guide rod moves from the cam protrusion to the end of the advance track of the cam groove and is locked. Subsequently, as the pushing of the memory card is released, the slide seat is pushed back to the front side due to the elastic force of the return spring, the above-mentioned guide rod moves to the end of the return track along the return track of the cam groove, and the slide seat also moves to the retreat position. At this time, the cooperating convex part of the half-lock shrapnel cooperates with the concave part of the memory card from the lateral direction, and the memory card is half-locked to prevent it from flying out. Then, after the sliding seat reaches the retracted position, when the memory card is pulled out, the matching convex part of the above-mentioned half-lock elastic piece breaks away from the concave part of the memory card, so that the memory card can be pulled out from the connector toward the front.

As mentioned above, the above-mentioned memory card connector uses the so-called heart-shaped cam groove mechanism and the return spring to perform the insertion of the memory card to the set position and the pull-out from the set position in stages in a push-in/push-out manner.

However, the half-locked state of the memory card held by the matching convex part of the half-lock shrapnel and the concave part of the memory card is not a completely locked state, but a loose holding state, and the memory card can still be easily locked. being unplugged and plugged in. In the above-mentioned push-push type card ejection mechanism, the power source is the return spring. When the spring force is released instantaneously, a large inertia will be generated, that is, an impact force will be generated. Therefore, when the memory card is withdrawn, the force of the return spring will If the elastic force is strong, there will be a problem that the memory card will fly out of the connector rapidly. In addition, when the memory card moves, the half-lock shrapnel is bent and deformed laterally by the reaction force from the mating part of the memory card. Since there is no mechanism to stop the bending deformation, it is impossible to press the half-lock shrapnel during the action. Adjustment. If the pressure of the half-lock shrapnel is set to be strong, it can effectively prevent the memory card from flying out of the connector. But in this case, if the pressing force of the half-lock shrapnel is too strong, the insertion and extraction of the memory card cannot be performed smoothly. Of course, in order to prevent the memory card from flying out, the elastic force of the return spring can also be set weakly. However, if the elastic force of the return spring is too weak, it may not be possible to ensure the required return force (stroke) to withdraw the memory card from the connector. There are also some designs in the prior art to prevent the memory card from flying out of the connector, but these designs usually cannot absorb the tolerance of the memory card, that is, when the memory card has a certain plus or minus tolerance, these anti-card fly-out designs will fail .

In addition, the above-mentioned existing memory card connectors are generally not provided with an anti-loosening mechanism to prevent the memory card from being loosened from the connector. When the memory card is in normal use, that is, in the locked working state, the deformation force of the half-lock shrapnel and the friction force between the memory card and the connector are used to ensure that the memory card will not fall off abnormally. However, in actual use, it can be found that the memory card is often pulled out forcibly by humans, or the vibration or abnormal external force generated by the electronic device during the movement process will loosen and fall off, resulting in the memory card not working normally. There are also some designs to prevent the memory card from coming out of the connector in the prior art, but these designs usually utilize parts made of metal to interact with parts made of plastic to realize the function of preventing the card from falling out, but due to the strength of the plastic part itself Insufficient, so these anti-card out designs are prone to failure.

Therefore, in order to ensure the safe and reliable use of the memory card in the electronic device, it is necessary to design a memory card connector that can effectively prevent the movement of the electronic device when the memory card is fully inserted. The detachment of the memory card caused by vibration, abnormal drop, etc., and the connector should be easy to operate, and has the advantages of simple mechanism and easy manufacture.

Contents of the invention

The main purpose of the present invention is to provide a memory card connector with switch terminals, which can provide a stable detection function of memory card insertion, to ensure better electrical contact and longer service life.

Another object of the present invention is to provide a memory card connector with switch terminals, which has the function of preventing flying cards.

Another object of the present invention is to provide a memory card connector with a switch terminal, which has the function of preventing the inserted memory card from being released from the connector.

In order to achieve the above object, the present invention provides a memory card connector, which includes: an insulating body having at least one card insertion space for accommodating the insertion of a corresponding memory card; a plurality of conductive terminals accommodated in the insulating body, It is used to make electrical contact with the corresponding contacts of the memory card; at least one first switch terminal and one second switch terminal are accommodated in the insulating body, each switch terminal has a holding part for holding with the insulating body, and a pin A part extends out of the insulating body from one end of the holding part, and an elastic part extends inwardly into the insulating body from one end of the holding part; and a card ejection mechanism can move on the insulating body. The two elastic parts of the first and second switch terminals are always kept at a distance, and the card ejecting mechanism has at least one metal contact; when the memory card is fully inserted into the card insertion space of the insulating body, the metal contact of the card ejecting mechanism follows until it is inserted between the two elastic parts of the switch terminal, and is elastically clamped and contacted by the two elastic parts, thereby electrically conducting the first switch terminal and the second switch terminal to realize the detection of the insertion of the memory card Measurement.

Preferably, the two conductive contacts of the above-mentioned pair of elastic switch terminals are misplaced along the insertion and withdrawal direction of the memory card, so that the contact piece of the card ejection mechanism can be docked with the two conductive contacts of the two switch terminals successively to achieve a more stable detection. test function.

Compared with the prior art, the memory card connector according to the present invention uses the non-wearable metal contact piece on the card ejection mechanism and the elastic energy provided by the two elastic parts of the switch terminal to effectively clamp and tightly and stably The ground is in electrical contact with the contact, thus ensuring the correct detection function. Simultaneously, through this pair of switch terminals bearing the resistance of inserting the memory card together, it can also overcome the defect that the switch terminals of the existing connectors only use a single elastic terminal and are prone to permanent deformation, thereby improving the reliability of the switch terminals and the memory card connector. degree and durability.

In addition, in order to achieve the above-mentioned purpose, the card ejecting mechanism of the memory card connector of the present invention further includes: a sliding seat that can slide along the direction of memory card insertion and extraction on the insulating body, and an elastic element that moves against the sliding seat along the direction of memory card withdrawal. Resetting elastic force is provided, and half of the locking elastic piece is installed on the sliding seat and has a matching protrusion. The matching convex portion of the half-lock elastic piece extends into the card insertion space of the insulating body, and cooperates with the concave portion provided on one side of the memory card to ensure that the memory card is in a half-lock state. The shielding shell is provided with a blocking elastic piece corresponding to the half-locking elastic piece, and the blocking elastic piece has a base protruding downward from the main body of the shielding shell, and an elastic portion extending from the base along the memory card withdrawing direction. When the memory card is about to be withdrawn, the elastic portion of the blocking shrapnel will abut against the half-lock shrapnel to apply force to the half-lock shrapnel, thereby reducing or even offsetting the impact force of the reset elastic element, which can not only restrain the bending deformation of the half-lock shrapnel, but also The matching force between the matching convex part of the half-lock elastic piece and the memory card concave part is increased. Moreover, the design of the blocking elastic piece can allow the size tolerance of the memory card, that is, when the size of the memory card includes a positive and negative tolerance, the blocking elastic piece and the matching protrusion of the half-locking elastic piece can mutually move away from or toward the memory card. Press down to allow for these tolerances. Therefore, when the memory card is ejected by the card ejection mechanism, the memory card connector according to the present invention can effectively prevent the memory card from flying away.

Moreover, in order to achieve the above purpose, the half-lock elastic piece of the card ejection mechanism of the memory card connector according to the present invention is further provided with a protruding portion, and the shielding case is provided with a conflicting portion corresponding to the protruding portion of the half-lock elastic piece. When the memory card is fully inserted and in the locked working state, the downward protruding interference portion of the shielding case can be pressed against the upwardly extending protrusion of the half-lock elastic piece, thereby changing the force arm of the half-lock elastic piece, thereby correspondingly Increase the holding force of the half-lock shrapnel to prevent its matching convex part from breaking away from the concave part of the memory card. In this way, it can ensure that the inserted memory card will not accidentally fall off during normal use or when it is shaken or dropped abnormally, ensuring safe and reliable use of the memory card, and preventing the memory card from being forcibly pulled out to a certain extent. out. At the same time, the cooperation between the interference part of the shielding shell and the protruding part of the half-lock spring is a metal-to-metal cooperation, so it has sufficient strength and is not easy to fail. Therefore, even when the memory card is in the working state, the memory card connector according to the present invention can still effectively prevent the memory card from being accidentally detached due to vibration, abnormality or strong external force.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Description of drawings

FIG. 1 is an exploded perspective view of the new memory card connector.

FIG. 2 is a three-dimensional assembled view of FIG. 1 .

FIG. 3 is a three-dimensional exploded view of another angle of the memory card connector of the present invention.

FIG. 4 is a three-dimensional assembled view of FIG. 3 .

5 is a three-dimensional assembly diagram of the insulating body, the first terminal, the second terminal and the card ejecting mechanism of the memory card connector of the present invention.

FIG. 6 is a perspective view of the second shielding shell of the memory card connector of the present invention.

Figure 7 is a schematic diagram of the new memory card connector, showing the positional relationship between the switch terminal pair and the contact piece on the card ejection mechanism when the TF card is in the half-lock state (for clarity, the insulating body is partially cut off) .

Fig. 8 is a schematic view of the new memory card connector, showing the docking state between the switch terminal pair and the contacts on the card ejection mechanism when the TF card is in working condition (for clear display, the insulating body is partially cut off).

Fig. 9 is a schematic diagram of the memory card connector of the present invention, showing the structure of the present invention that can prevent the card from flying away when the TF card is withdrawn.

Fig. 10 is a schematic view of the memory card connector of the present invention, showing the structure of the present invention that can prevent the card from being accidentally detached when the TF card is in working condition.

Detailed ways

Relevant detailed description and technical contents of the present invention are as follows now in conjunction with the accompanying drawings:

Please refer to FIG. 1. FIG. 1 is a two-in-one memory card connector according to a preferred embodiment of the present invention, which can be installed in various electronic devices for a SIM card 8 and a TF or Micro SD card 9 It is inserted into it to form an electrical connection to store digital data. It should be noted that although this new model is described by taking a two-in-one memory card connector of a SIM card and a TF or Micro SD card as an example, the patent scope of this new model is not limited thereto. Connectors of other forms of memory cards Also applicable.

As shown in Figures 1 and 3, the memory card connector includes an insulating body 1, a plurality of first terminals 2, a plurality of second terminals 3, a card ejection mechanism 4, a first shielding shell 5, a first Two shielding shells 6 and a pair of elastic and symmetrical switch terminals 7 . Wherein, the insulative body 1 is made of plastic material, and three surrounding side walls are respectively formed on the top and bottom of the insulative body 1 to form a first card insertion space 11 and a second card insertion space 12 in a concave shape. Stacked on top of each other.

A first socket 13 and a second socket 14 are respectively outwardly formed on different sides of the top and bottom of the insulating body 1, so that the SIM card 8 and the TF card 9 pass through the first socket 13 and the second socket 14 from the outside respectively. The second socket 14 is inserted into the first card insertion space 11 and the second card insertion space 12 , and its insertion state is shown in FIG. 2 and FIG. 4 . The outer edge of the side wall of the insulating body 1 is provided with a plurality of first fastening blocks 15 and a plurality of second fastening blocks 16, which are respectively used to fasten and fix the first shielding shell 5 and the second shielding shell 6 (such as Figure 2). A row of openings 17 are formed on the top of the insulating housing 1 to correspond to the first terminals 2 .

These first terminals 2 are made of conductive metal material and are divided into two different lengths, and each first terminal 2 has a first fixing part 21, and the two ends of the first fixing part 21 are respectively extended and bent A first contact portion 22 and a first pin portion 23 are formed, and the first terminals 2 are embedded and fixed on the insulating housing 1 by the first fixing portion 21 . The first contact portion 22 of these first terminals 2 stretches into the first card insertion space 11 through the opening 17, and is inserted into the electrical contacts 81 on the SIM card 8 in the first card insertion space 11 (such as As shown in Figure 2) the contact realizes the electrical connection. As shown in FIG. 4 , the first leg portions 23 of the first terminals 2 protrude from the side of the insulating housing 1 to be soldered on the circuit board.

The second terminals 3 are made of conductive metal material, and each second terminal 3 has a second fixing portion 31 embedded and fixed on the insulating body 1 . Two ends of the second fixing portion 31 are respectively extended and bent to form a second contact portion 32 and a second leg portion 33 . As shown in Figure 5, the second contact portion 32 of the second terminal 3 is used to extend into the second card insertion space 12, and to be inserted into the electrical contacts on the TF card 9 in the second card insertion space 12. 91 (as shown in FIG. 1 ) contacts to realize electrical connection. The second leg portions 33 of the second terminals 3 pass through the side of the insulating housing 1 to be soldered on the circuit board.

As shown in FIG. 1 and FIG. 3 , the pair of elastic and symmetrical switch terminals 7 is also made of conductive metal material, including a first switch terminal and a second switch terminal. Each switch terminal 7 has a fixing portion 71 , and a resilient portion 72 and a leg portion 73 are respectively extended and bent from two ends of the fixing portion 71 . As shown in Figure 1 and Figure 5, the fixing parts 71 of these switch terminals 7 are used to be embedded and fixed on the insulating body 1, and the pin parts 73 of these switch terminals 7 pass through the side of the insulating body 1, and Solder on the circuit board simultaneously with the pin portion 33 of the second terminal 3 . The elastic portions 72 of the pair of switch terminals 7 are always separated by a certain distance, and extend into an opening 18 of the insulating housing 1 . Each elastic portion 72 has an arc-shaped free end 720 on which a conductive contact 721 is disposed. Preferably, the two conductive contacts 721 of the two elastic parts 72 are dislocated along the insertion and removal direction AB of the TF card 9 (refer to FIG. 7 and FIG. 8 ).

The card ejection mechanism 4 is installed on one side of the insulating body 1 for assisting the insertion and extraction operation of the TF card 9 . As shown in FIG. 1 and FIG. 3 , the card ejection mechanism 4 includes a sliding seat 41 , an elastic element 42 , a guide rod 43 , half-lock elastic pieces 44 and a contact piece 45 . The sliding seat 41 is slidably arranged on the side of the insulating body 1 along the insertion and extraction direction AB of the TF card 9, and the outer edge of the sliding seat 41 is provided with a cam groove 410 that can be used to control card insertion and withdrawal (please Refer to Figure 3). The elastic element 42 is a compression spring, one end of which is in contact with the sliding seat 41 , and the other end is in contact with the insulating body 1 . After the memory card 9 is inserted into the connector to compress the elastic member 42 , once the card is withdrawn, the elastic member 42 can provide restoring elastic force to the sliding seat 41 along the card withdrawing direction B of the TF card 9 . The guide rod 43 is a "ㄈ"-shaped metal rod body, one fixed end of which is fixed in the insulating body 1, and the other movable end can move in the cam groove 410 in two stages to realize card insertion/retraction respectively. card operation.

The half-lock elastic piece 44 has a U-shaped fixing part 440 to be accommodated on the sliding seat 41, and a matching convex part 441, which extends into the second card insertion space 12 of the insulating body 1 and is provided on one side of the TF card 9. The recess 90 cooperates (as shown in FIG. 9 ). A protruding portion 442 extends from a side edge of the fixing portion 440 of the half locking elastic piece 44 . The contact piece 45 includes a fixing part 450 and a pair of connecting parts 451, wherein the fixing part 450 is assembled in a slot 411 of the sliding seat 41, and the connecting part 451 protrudes out of the sliding seat 41 for connecting with the pair of first The two elastic parts 72 of the first and second switch terminals 7 are butted to realize the function of detecting whether the TF card 9 has been fully inserted.

As shown in FIG. 1 and FIG. 2 , the first shielding shell 5 is made of metal material, which covers the top of the insulating housing 1 to provide electromagnetic shielding effect. The sidewall of the first shielding shell 5 is provided with a plurality of first fastening holes 51 corresponding to the first fastening blocks 15 of the insulating housing 1 . Through these first fastening holes 51 and these first fastening blocks 15 snapping together, the first shielding shell 5 and the insulating body 1 can be snapped into one body, and cover the first part of the insulating body 1. A card insertion space 11 top. As shown in Figures 1 and 3, the side wall of the first shielding housing 5 is integrally formed with an elastic pressing piece 52, which is used to elastically press against the outer edge of the guide rod 43 of the card ejecting mechanism 4, so that the guide The guide rod 43 can be stably fitted into the cam groove 410 .

As shown in FIG. 1 and FIG. 4 , the second shielding shell 6 is made of metal material, which covers the bottom of the insulating housing 1 to provide electromagnetic shielding effect. The sidewall of the second shielding shell 6 is provided with a plurality of second fastening holes 61 corresponding to the second fastening blocks 16 of the insulating housing 1 . Through the snap-fit combination of the second fastening holes 61 and the second fastening blocks 16, the second shielding shell 6 and the insulating body 1 can be snap-fitted into one body, and cover the insulating body 1. The bottom of the second card insertion space 12 . Please further refer to FIG. 6, the second shielding shell 6 is provided with an outwardly protruding elastic pressing piece 62 for elastically abutting against the side of the TF card 9 without a recess (refer to FIG. 9 ), and an outwardly extending The blocking shrapnel 63, and a conflicting piece 64 that protrudes outwards but is torn.

As shown in Figure 1, Figure 6 and Figure 9, the blocking elastic piece 63 has a base 630 extending outward from the second shielding shell 6, and extends from the base 630 along the exit direction B of the TF card 9 and approaches the half lock. An elastic portion 631 is inclined on the side of the elastic piece 44 . Both the resisting member 64 and the blocking elastic piece 63 are located on the same side of the slot 65 formed in the second shielding shell 6 . The resisting member 64 protrudes upwards for abutting against the protruding portion 442 of the half lock elastic piece 44 (as shown in FIG. 10 , which will be described later). The resisting member 64 includes a resisting portion 640 for abutting against the protruding portion 442 of the half-lock spring 44 , and two connecting portions 641 for connecting with the main body of the second shielding shell 6 . The abutting portion 640 extends along the insertion and removal direction AB of the TF card 9 , has a height difference from the main body of the second shielding case 6 , and protrudes toward the insulating case 1 . The second shielding shell 6 is provided with a window 66 corresponding to the elastic portion 72 of the switch terminal 7 and the opening 18 of the insulating body 1, which can be used to observe whether the two elastic portions 72 of the switch terminal 7 are accurately docked with the docking portion 451 of the contact piece 45. .

As shown in Figures 1 and 2, when the SIM card 8 is inserted into the first card insertion space 11 of the connector until it is positioned, the electrical contacts 81 on the SIM card 8 can be connected to the first terminals 2 of the SIM card 8. A contact portion 22 contacts to realize electrical connection, so that the SIM card 8 can be electrically connected to the circuit board through the memory card connector.

As shown in Figure 1, Figure 7 and Figure 9, when the TF card 9 is inserted into the second card insertion space 12 through the opening 14 of the insulating body 1, the TF card 9 can push the sliding seat 41 of the card ejection mechanism 4 to synchronize Action until the TF card 9 moves to the half-lock position, the matching convex part 441 of the half-lock elastic piece 44 of the card ejection mechanism 4 will snap into the concave part 90 provided on the side of the TF card 9, thereby loosely holding the TF card 9 on the half locked state. But in this half-lock state, the electrical contact point 91 on the TF card 9 has not been in contact with the second contact portion 32 of the second terminal 3 to realize electrical connection, and the relative elastic portions 72 of the two switch terminals 7 are also connected to each other. There is still a certain distance, that is, there is no electrical conduction between them, so the electrical connection between the connector and the memory card 9 is still in the initial Open state.

After that, as shown in FIGS. 1 and 10 , if the TF card 9 continues to be inserted into the connector along the direction A, it will continue to slide forward together with the sliding seat 41 to reach the front end of the insertion direction, and compress the elastic element 42 . Subsequently, the sliding seat 41 retreats, and the guide rod 43 cooperates with the matching portion in the cam groove 410 , so that the sliding seat 41 stops moving in the insulating body 1 . At this time, as shown in FIG. 1 and FIG. 8 , the TF card 9 has been inserted into position, and the electrical contacts 91 on it are in contact with the second contact portion 32 of the second terminal 3 to realize electrical connection. At this time, the contact piece 45 assembled on the sliding seat 41 moves with the sliding seat 41 until the contact piece 45 is inserted along the slope of the free end 720 of the elastic part 72 of the two switch terminals 7, so that the two elastic switches The elastic portion 72 of the terminal 7 produces a rebound force due to being pressed, and the contact piece 45 is clamped between the elastic portions 72 of the two switch terminals 7, and is respectively docked with the two conductive contacts 721 of the free ends 720 of the two elastic portions 72, The two elastic switch terminals 7 are electrically connected to each other, so as to realize the detection function of the memory card insertion. In this way, it can be determined that the TF card 9 has been stably connected to the connector, and enters the working state of reading and writing, and the TF card 9 is electrically connected with the circuit board of the electronic device through the memory card connector.

As mentioned above, the new memory card connector utilizes the non-wearable metal contact piece 45 provided on the sliding seat 41 to clamp and contact the two elastic parts 72 of the switch terminal 7, so that the electrical contact between the two can be made more stable. Tight and stable, so it can ensure the detection function is correct. At the same time, it can also overcome the problem that the existing switch terminals are prone to metal fatigue and permanent deformation only by bending one terminal and contacting the other terminal, especially when the memory card itself has a certain dimensional tolerance, thereby improving the switch terminal 7. And the reliability and durability of the memory card connector. In addition, preferably, the two conductive contacts 721 provided on the free ends 720 of the two elastic parts 72 of the switch terminal 7 are misplaced along the insertion and withdrawal direction AB of the TF card 9, so that the contact pieces 45 of the card ejection mechanism 4 can be arranged successively The pair of switch terminals 7 is electrically connected twice, so a more stable and reliable detection function can be provided.

As mentioned above, in the traditional design, the TF card 9 is only through the deformation elastic force of the half-lock elastic piece 44 (that is, the matching convex part 441 of the half-lock elastic piece 44 elastically fits with the concave part 90 of the TF card 9) and the connection between the TF card 9 and the connection. The frictional force between the devices is used to ensure that the TF card 9 will not fall off abnormally, so it is a little weak. In actual application, it can be found that the TF card 9 will often fall out of the connector due to artificially forcibly pulled out, or the vibration or abnormal drop generated during the moving process, causing the TF card 9 to fail. normal work. On the contrary, as shown in Fig. 1 and Fig. 10, when the TF card 9 is in the locked working state, the side edge of a resisting member 64 of the second shielding case 6 of the new memory card connector is used to press the half lock The side of the protruding part 442 of the elastic piece 44 can increase the force arm of the half-lock elastic piece 44, thereby correspondingly increasing the holding force of the half-lock elastic piece 44 to the concave portion 90 of the TF card 9, preventing the matching convex portion 441 from the concave portion 90 of the TF card 9 break away. In this way, it can be ensured that the inserted TF card 9 will not be separated from the connector even if it is shaken, dropped or pulled out by force during use, thereby ensuring safe and reliable use of the TF card 9 . At the same time, the cooperation between the resisting part 64 of the second shielding shell 6 and the protruding part 442 of the half-lock spring 44 is a cooperation between metal and metal materials, so it has sufficient strength and is not easy to fail. In addition, the resisting member 64 of the second shielding shell 6 is formed by tearing, so the structure is simple and the manufacture is convenient.

Please refer to Figure 3, Figure 7 and Figure 9, when you want to withdraw the TF card 9, you can push the TF card 9 along the card insertion direction A, and the TF card 9 will drive the sliding seat 41 of the card ejection mechanism 4, The moving guide rod 43 moves so that one end of the guide rod 43 moves in the cam groove 410 . When the push to the TF card 9 is released, since the elastic member 42 exerts a reset rebound force on the sliding seat 41 along the card-removing direction B, the sliding seat 41 drives the TF card 9 to move back to the half-lock position. At this time, the mating convex portion 441 of the half-lock elastic piece 44 laterally cooperates with the concave portion 90 of the TF card 9 to keep the TF card 9 in a loose half-locked state again. Subsequently, when the TF card 9 is pulled out, the matching convex portion 441 of the above-mentioned half-lock elastic piece 44 can disengage from the concave portion 90 of the TF card 9 , thereby withdrawing the TF card 9 .

As shown in Figure 9, in order to overcome the problem that the TF card 9 may fly out of the connector rapidly due to the recovery elastic force of the elastic element 42 of the card ejection mechanism 4 when the TF card 9 is withdrawn, the new memory card connector A blocking elastic piece 63 is provided at the position of the second shielding shell 6 corresponding to the half lock elastic piece 44 . As mentioned above, the blocking elastic piece 63 has an elastic portion 631 extending along the withdrawal direction B of the TF card 9 and inclined toward the side close to the half locking elastic piece 44 . When withdrawing from the TF card 9 to make it in the half-lock state as shown in Figure 9, the elastic part 631 of the blocking elastic piece 63 abuts against the free end of the matching convex part 441 of the half-lock elastic piece 44 and locks the half-lock elastic piece 44. The cooperating convex part 441 exerts force in the direction of the TF card 9, thereby reducing or even offsetting the impact force of the elastic element 42 in the process of withdrawing the card, restraining the bending deformation of the half-lock elastic piece 44, and increasing the cooperation of the half-lock elastic piece 44. The holding force between the convex portion 441 and the concave portion 90 of the TF card 9 . In this way, when the TF card 9 is taken out, the problem that the TF card 9 will fly out from the second socket 14 of the insulating case 1 can be effectively prevented. Moreover, the design of the blocking elastic piece 63 can absorb the tolerance of the TF card 9, that is, when the size of the TF card 9 has a certain positive and negative tolerance, the elastic portion 631 of the blocking elastic piece 63 and the matching convex portion 441 of the half lock elastic piece 44 These tolerances can be absorbed by pressing against each other in a direction away from or toward the TF card 9 .

To sum up, compared with the prior art, the memory card connector according to the present invention utilizes the metal contact piece 45 on the sliding seat 41 to effectively clamp and contact the pair of elastic switch terminals 7, and is not easily deformed, so it has the advantages of Stable and reliable detection function. When the TF card 9 is fully inserted and is in working condition, by pressing against each other with the protruding part 442 of the resisting member 64 and the half-lock elastic piece 44, the moment arm of the half-lock elastic piece 44 can be changed to correspondingly increase the impact of the half-lock elastic piece 44 on the TF card. 9 holding force, so as to ensure that the inserted TF card 9 will not fall off due to vibration, abnormal drop or external force during use. In addition, when the TF card 9 is withdrawn, the elastic part 631 of the blocking elastic piece 63 of the new connector abuts against the free end of the mating convex portion 441 of the half-lock elastic piece 44, which can effectively prevent the TF card 9 from flying rapidly out of the connector. out.

Claims (25)

1. A memory card connector, comprising: An insulating body at least has a card insertion space for accommodating the insertion of a corresponding memory card; A plurality of conductive terminals are accommodated in the insulating body and are used for electrical contact with corresponding contacts of the memory card; At least one first switch terminal and one second switch terminal are accommodated in the insulating body, each switch terminal has a holding portion for holding with the insulating body, a pin portion extending out of the insulating body from one end of the holding portion, and a The elastic part extends inwardly from one end of the holding part into the insulating body; and A card ejection mechanism, which can move on the insulating body; It is characterized in that: the two elastic parts of the first and second switch terminals are always kept at a certain distance, and the card ejecting mechanism has at least one metal contact piece; when the memory card is completely inserted into the card insertion space of the insulating body, the card ejecting mechanism The metal contact moves accordingly until it is inserted between the two elastic parts of the switch terminal, and is elastically clamped and contacted by the two elastic parts, thereby electrically conducting the first switch terminal and the second switch terminal to realize memory Detection of card insertion. 2. The memory card connector as claimed in claim 1, wherein the first switch terminal and the second switch terminal have symmetrical shapes and are arranged correspondingly in the insulating body. 3. The memory card connector as claimed in claim 2, wherein the elastic portion of each switch terminal has a free end in an arc shape, and the free end is provided with a conductive contact for contacting the metal of the card ejection mechanism. The contacts make contact. 4. The memory card connector as claimed in claim 3, wherein the two conductive contacts on the two elastic parts of the two switch terminals are dislocated along the insertion and removal direction of the memory card. 5. The memory card connector as claimed in claim 1, wherein the card ejecting mechanism further has a sliding seat for the card ejecting mechanism to move on the insulating body, and an elastic element is disposed on the sliding seat. 6. The memory card connector as claimed in claim 5, wherein the metal contact piece of the card ejection mechanism comprises a fixing portion and a pair of mating portions, the fixing portion is assembled in the sliding seat, and the mating portion protrudes Extend out the sliding seat, when the memory card is fully inserted into the card insertion space of the insulating body, the butt joint portion of the metal contact will clamp and contact with the two elastic parts of the two switch terminals along with the sliding of the sliding seat. 7 . The memory card connector as claimed in claim 1 , wherein an opening is formed on the insulating body adjacent to the side wall where the card ejecting mechanism is installed, and the two elastic portions of the switch terminal are partially accommodated in the opening. 8 . 8. The memory card connector according to claim 7, further comprising a shielding shell, the shielding shell covers the insulating body and is provided with a window corresponding to the opening of the insulating body, for the exposed part to be accommodated in the insulating body The two elastic parts of the switch terminal inside the opening. 9. A memory card connector comprising: An insulating body, at least provided with a card insertion space for accommodating the insertion of a corresponding memory card; a plurality of conductive terminals accommodated in the insulating body; A card ejection mechanism, which can move on the insulating body, the card ejection mechanism has at least one elastic element for generating elastic force, and a half-lock elastic piece for cooperating with a recess of the memory card to keep the memory card in a half-lock state ;as well as At least one shielding shell is used to cover the insulating body; It is characterized in that: the shielding shell is provided with a blocking elastic piece corresponding to the half-locking elastic piece of the card ejecting mechanism, and when the memory card withdraws from the connector, the blocking elastic piece can abut against the half-locking elastic piece to slow down the force exerted by the elastic element on the memory card. Stretch outward. 10. The memory card connector as claimed in claim 9, wherein the shielding shell is provided with a slot, and the blocking elastic piece is located in the slot. 11. The memory card connector as claimed in claim 9, wherein the card ejecting mechanism further comprises a sliding seat that can slide along the direction of inserting and removing the memory card, and the elastic element is used to apply elastic force to the sliding seat. 12. The memory card connector as claimed in claim 11, wherein the half-lock elastic piece is installed on the sliding seat, and has a fixing portion and a mating protrusion, and the mating protrusion protrudes into the plug of the insulating body. In the card space, it is used to cooperate with the concave part of the memory card to keep the memory card in a half-locked state. 13. The memory card connector as claimed in claim 12, wherein the blocking elastic piece has a base protruding from the shielding case to the insulating body, and an elastic portion extending from the base along the withdrawing direction of the memory card , when the memory card is withdrawn, the elastic portion of the blocking elastic piece abuts against the half-lock elastic piece, so that the matching convex portion of the half-lock elastic piece is firmly fitted with the concave portion of the memory card. 14. The memory card connector according to claim 12, wherein the shielding housing further comprises a resisting member, the resisting member comprises a resisting portion and two connecting portions connected to the main body of the shielding case, the resisting portion It extends along the inserting and pulling out direction of the memory card, has a height difference relative to the shielding case, and protrudes toward the insulating body. 15. The memory card connector as claimed in claim 14, characterized in that an edge of the fixed part of the half-lock spring protrudes toward the shielding housing and is provided with a protruding part, when the memory card is fully inserted into the card insertion space of the insulating body In the working state, the side edge of the resisting part of the shielding case just presses against the side of the protruding part of the half-lock elastic piece, so that the memory card is not easy to come out due to external force in the working state. 16. The memory card connector as claimed in claim 14, wherein the shielding shell is provided with a slot, and the blocking elastic piece and the resisting member are both located in the slot and on the same side. 17. The memory card connector as claimed in claim 14, wherein the blocking elastic sheet is stamped, and the resisting member is torn. 18. The memory card connector as claimed in claim 14, wherein the blocking elastic piece is closer to the slot of the card insertion space of the insulating body than the resisting member. 19. The memory card connector according to claim 9, wherein the side wall of the shielding housing is provided with a plurality of fastening holes, and the outer periphery of the insulating body is correspondingly provided with a plurality of fastening blocks for mutual Snap fit. 20. The memory card connector as claimed in claim 9, wherein the shielding housing is provided with an elastic pressing piece relative to the blocking elastic piece, the elastic pressing piece protrudes toward the insulating body and extends along the insertion and removal direction of the memory card, It is used to elastically abut against the side of the memory card that is not provided with a concave portion. 21. A memory card connector comprising: An insulating body, at least provided with a card insertion space for accommodating the insertion of a corresponding memory card; a plurality of conductive terminals accommodated in the insulating body; A card ejection mechanism is assembled on the insulating body, and the card ejection mechanism includes a sliding seat that slides along the memory card insertion and extraction direction, an elastic element that applies elastic force to the sliding seat along the memory card withdrawal direction, and has a A fixed part on the sliding seat and a half-lock elastic piece of a matching convex part, the matching convex part protrudes into the card insertion space of the insulating body, and is used to cooperate with a concave part of the memory card to keep the memory card in half lock state; and a shielding shell, used to cover the insulating body; It is characterized in that: an edge of the fixing part of the half-lock elastic piece is provided with a protruding part, and the shielding shell is provided with a resisting part corresponding to the protruding part of the half-locking elastic part, and the resisting part includes a conflicting part, and is used for shielding The two connecting parts connected to the housing, wherein the conflicting part extends along the insertion and extraction direction of the memory card, and has a height difference from the shielding housing. When the memory card is fully inserted and in working condition, the side of the conflicting part of the shielding housing The edge is pressed against the side of the protruding part of the half-lock elastic piece, so that the memory card is not easy to come out due to external force when it is in the working state. 22. The memory card connector as claimed in claim 21, wherein the shielding shell is provided with a slot, and the resisting member is located in the slot. 23. The memory card connector as claimed in claim 21, wherein the resisting member is tear-shaped. 24. The memory card connector according to claim 21, wherein the side wall of the shielding housing is provided with a plurality of fastening holes, and the outer periphery of the insulating body is correspondingly provided with a plurality of fastening blocks for mutual Snap fit. 25. The memory card connector as claimed in claim 21, wherein the shielding shell is provided with an elastic pressing piece relative to the resisting member, and the elastic pressing piece protrudes toward the insulating body and extends along the insertion and removal direction of the memory card, It is used to elastically abut against the side of the memory card that is not provided with a concave portion.

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