JP5044049B1 - Connector device - Google Patents

Abstract

To appropriately adjust impedance between differential signal terminals.
A housing capable of mounting a memory card, and a plurality of contact terminals (4) provided on the housing and connectable to electrodes of the memory card, and a pair of adjacent ones of the plurality of contact terminals (4). The contact terminals (4) are a pair of differential signal terminals (41) corresponding to differential transmission, and the middle part in the extending direction of the pair of differential signal terminals (41) sandwiches the middle part. A shape changing portion (46) is formed in which the width dimension or the thickness dimension is different between the one end side and the other end side, and the width dimension or the thickness dimension changes from one end side to the other end side. A pair of differential signal terminals (41) is provided in the housing so that a dielectric is interposed at least at a part between (46).
[Selection] Figure 6

Description

  The present invention relates to a connector device that supports high-speed data transmission between an electronic device and a mounted member such as a memory card mounted on the electronic device.

  2. Description of the Related Art Conventionally, as a connector device that supports high-speed data transmission, there is known a device that increases transmission efficiency by matching impedance between an electronic device and a memory card (see, for example, Patent Document 1). In the connector device of Patent Document 1, a plurality of terminals extending in the card insertion direction are disposed on the bottom wall portion of the housing, and a ground plate is provided on the lower surface of the bottom wall portion so as to face each terminal. Each terminal has a tapered arm portion extending from the base end portion fixed to the housing to the back, and a narrow soldering portion protruding forward from the base end portion.

  Further, the ground plate has a vertical width that is equal to or greater than the entire length of the arm portion and a horizontal width that substantially coincides with both ends of the plurality of terminals. With this configuration, the ground plate is positioned directly under each terminal, and a microstrip line structure is formed for all terminals. In the connector device of Patent Document 1, in the microstrip line structure, the impedance of the terminal is adjusted by adjusting the distance between each terminal and the ground plate.

JP 2010-129173 A

  By the way, in the above-described connector device, in order to cope with high-speed data transmission, the pair of differential signal terminals perform high-speed differential transmission that is resistant to noise. However, since the terminal shape described above is abruptly narrowed between the base end portion and the soldering portion, the distance between the pair of differential signal terminals is greatly changed. In this part, since the impedance changes abruptly, there is a problem that an insertion loss (insertion loss) and a return loss (reflection loss) at the terminal increase, and the transmission efficiency of the connector device decreases.

  The present invention has been made in view of such a point, and an object thereof is to provide a connector device capable of appropriately adjusting impedance between differential signal terminals.

The connector device of the present invention includes a housing to which a member to be attached can be attached, and a plurality of terminals provided on the housing and connectable to electrodes of the member to be attached, and a pair of adjacent terminals among the plurality of terminals. The terminals are a pair of differential signal terminals corresponding to the differential transmission, and the intermediate portions in the extending direction of the pair of differential signal terminals have a width on one end side and the other end side with the intermediate portion interposed therebetween. A shape changing portion having a different dimension or thickness, and changing in width or thickness as it progresses from one end side to the other end side in the middle portion is formed, and at least part of the pair of shape changing portions is dielectric. The pair of differential signal terminals are provided in the housing so that a body is interposed, and the pair of differential signal terminals are spaced apart from the pair of shape change portions on the side surfaces opposite to the side surfaces adjacent to each other. ,other Cutting mark of the connecting crosspiece between the terminals and wherein the remaining.

According to this configuration, since the dielectric is interposed between the pair of shape changing portions where the impedance greatly changes, it is possible to suppress the influence of the impedance due to the shape change of the terminal. As a result, the impedance between the differential signal terminals is appropriately adjusted, insertion loss and return loss are reduced, and transmission efficiency such as data transmission is improved. In addition, since the shape is not changed by the cut marks on the side surfaces facing each other, the impedance due to the cut marks is not affected.

  In the connector device of the present invention, the housing is made of resin, and the dielectric is made of a part of the housing. According to this configuration, since the dielectric can be constituted by a part of the housing, the dielectric can be easily interposed between the pair of shape changing portions.

  In the connector device according to the present invention, at least a part between the pair of shape changing portions is embedded in the housing. According to this configuration, since the outer surface of the shape changing portion is covered from the periphery by the resin, it is possible to further suppress the influence of the impedance due to the shape change of the terminal.

  In the connector device of the present invention, the side surface of the differential signal terminal in the shape changing portion changes to a linear shape, a curved shape, or a shape in which straight lines are folded. According to this configuration, it is possible to reduce the influence of the impedance on the signal transmission by gradually changing the impedance in the shape changing portion as compared with the case of the shape changing portion in which the width dimension changes rapidly.

  In the connector device of the present invention, the thickness of the dielectric is changed in the shape changing portion in accordance with the change in the width or thickness of the differential signal terminal. According to this configuration, the impedance can be appropriately adjusted in accordance with the shape change in the shape change portion.

  In the connector device of the present invention, the pair of shape changing portions are formed symmetrically with reference to a virtual cross section passing through a midpoint between the pair of differential signal terminals in the extending direction of the terminals. According to this configuration, the impedance between the pair of differential signal terminals can be easily adjusted.

  Further, in the connector device of the present invention, the side surfaces adjacent to each other of the pair of shape change portions are based on a virtual cross section passing through a midpoint between the pair of differential signal terminals in the extending direction of the differential signal terminals. As symmetrically formed. According to this configuration, by forming symmetrically the side surfaces adjacent to each other of the pair of shape changing portions having a large influence on the impedance, the influence of the impedance due to the shape change of the terminals can be reduced.

  Further, in the connector device according to the present invention, the shape changing portion may have a width dimension different from each other at one end side and the other end side of the intermediate portion in the extending direction of the pair of differential signal terminals. The pair of differential signal terminals is formed such that the width dimension changes as it proceeds from one end side to the other end side in the middle portion, and a dielectric is interposed at least at a part between the pair of shape change portions. Is provided in the housing. According to this configuration, since the dielectric is interposed between the pair of shape changing portions whose impedance changes greatly, it is possible to suppress the influence of the impedance due to the change in the terminal interval between the pair of shape changing portions. As a result, the impedance between the differential signal terminals is appropriately adjusted, insertion loss and return loss are reduced, and transmission efficiency such as data transmission is improved.

  In the connector device of the present invention, the mounted member is a memory card. According to this configuration, the transmission efficiency between the memory card and the electronic device can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the connector apparatus which can adjust an impedance appropriately between differential signal terminals can be provided.

It is a perspective view of the connector device concerning this embodiment. It is a perspective view of the connector device which removed the cover concerning this embodiment. It is a schematic diagram around a pair of differential signal terminals according to the present embodiment. It is a perspective view of the periphery of the differential signal terminal according to the present embodiment. It is a graph which shows the variation | change_quantity of the capacitance in the shape change part which concerns on this Embodiment. It is explanatory drawing of the relationship between the holding position of the terminal holding part which concerns on this Embodiment, and impedance. It is a perspective view of the lock part and slide member of the connector apparatus which concern on this Embodiment. It is explanatory drawing of the mounting | wearing operation | movement of the thick card based on this Embodiment. It is explanatory drawing of the mounting | wearing operation | movement of the thin card based on this Embodiment. It is a top view of the thin card | curd which concerns on this Embodiment. It is a top view of the thick card | curd incompatible with the differential transmission which concerns on this Embodiment. It is a top view of the thick card | curd corresponding to the differential transmission which concerns on this Embodiment. It is a schematic diagram around a pair of differential signal terminals according to a first modification. It is a schematic diagram around a pair of differential signal terminals according to a second modification. It is a schematic diagram around a pair of differential signal terminals according to a third modification. It is explanatory drawing of the relationship between the holding | maintenance range and impedance of the terminal holding part which concerns on a 4th modification. It is a schematic diagram around a pair of differential signal terminals according to a fifth modification.

  Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings. In the following, a connector device that allows insertion of a thin card and two types of thick cards will be described as an example. However, the connector device is not limited to this and can be changed as appropriate.

  First, before describing the connector device according to the present embodiment, a thin card and two types of thick cards that are mounted members will be described. FIG. 10 is a plan view of the thin card according to the present embodiment. FIG. 11 is a plan view of a thick card that does not support differential transmission according to the present embodiment. FIG. 12 is a plan view of a thick card corresponding to differential transmission according to the present embodiment.

  As shown in FIGS. 10A and 10B, the thin card 7 is a so-called multimedia card (MMC) formed with a certain thickness in the insertion direction, and is formed in a substantially rectangular shape when viewed from above. An inclined surface 71 is formed at one corner of the thin card 7 and is notched and inclined at about 45 degrees. The inclined surface 71 is used to identify the insertion direction of the thin card 7, and the side on which the inclined surface 71 is formed is the front end side in the insertion direction, and the opposite side is the rear end side in the insertion direction. A plurality of pads 72 that contact the plurality of contact terminals 4 b of the connector device 1 are provided on the front end side of the thin card 7.

  As shown in FIGS. 11A and 11B, the thick card 8 is a so-called SD card formed to be thicker than the thin card 7, and is formed in a substantially rectangular shape when viewed from above. Further, the thick card 8 is configured based on the specifications of the thin card 7, and the upper stage is formed in a step shape having the same width as the thin card 7 in a front view. An inclined surface 81 for identifying the insertion direction is formed at one corner of the thick card 8 and is notched as in the thin card 7 and is inclined at about 45 degrees.

  Further, a groove portion 82 is formed by a plurality of partition walls 83 extending in a plurality of insertion directions on the leading end side where the inclined surface 81 of the thick card 8 is formed. The groove 82 is provided with a plurality of pads 84 that come into contact with the plurality of contact terminals 4 b of the connector device 1. Further, on one side surface of the thick card 8, a notch 85 that is locked to a locking portion 53 of the slide member 5 described later is provided. On the other side surface of the thick card 8, an operation unit 86 for prohibiting writing to the memory in the card is provided.

  As shown in FIGS. 12A and 12B, the other thick card 9 is formed in substantially the same shape as the SD card, and is a card (for example, UHS) that supports differential transmission with an increased number of pads than the SD card. -II card). Similar to the thick card 8, the thick card 9 has an inclined surface 91 for identifying the insertion direction in which one corner of a rectangular shape in a top view is cut out at about 45 degrees. On the back surface of the thick card 9, a plurality of pads 94a, 94b are arranged in two rows. Some pads 94a in the front row include pads for differential signals. Further, the thick card 9 is provided with a notch 95 to be engaged with the engaging portion 53 of the slide member 5 on one side surface, and an operation portion 96 for prohibiting writing to the memory in the card on the other side surface. It has been.

  Next, the overall configuration of the connector device will be described with reference to FIGS. FIG. 1 is a perspective view of the connector device according to the present embodiment. FIG. 2 is a perspective view of the connector device with the cover removed according to the present embodiment.

  As shown in FIG. 1 and FIG. 2, the connector device 1 according to the present embodiment is a box having an insertion port 21 by attaching a cover 3 from above to a housing body 2 whose upper surface and front surface are opened. Forms a housing (housing). The insertion slot 21 has a shape complementary to the two types of thick cards 8 and 9 when viewed from the front. The two types of thick cards 8 and 9 are inserted into the stepped area of the insertion slot 21, and the thin card 7 is inserted into the upper rectangular area of the insertion slot 21.

  On the bottom wall portion 22 of the housing body 2, a plurality of contact terminals 4a and 4b made of, for example, phosphor bronze are arranged in two rows in the front-rear direction. The contact terminals 4a on the front row side are held side by side at a predetermined interval by a terminal holding portion 23 that crosses the housing body 2 in the width direction. One end of the contact terminal 4 a extends toward the back in the window 24 a of the bottom wall portion 22 and can be connected to a pad 94 a in front of the thick card 9. The other end of the contact terminal 4a protrudes forward and is soldered to the mounting board. Further, a part of the adjacent terminals of the contact terminal 4a is a pair of differential signal terminals for differential transmission.

  The contact terminals 4b on the rear row side are held side by side at a predetermined interval by the back wall portion 25. One end of the contact terminal 4b protrudes out of the housing and is soldered to the mounting board. The other end of the contact terminal 4 b extends forward in the window portion 24 b of the bottom wall portion 22 and can be connected to the pads 72, 84, and 94 b of the cards 7, 8, and 9. The contact terminals 4a and 4b are attached by insert molding to the housing body 2 formed of a synthetic resin such as LCP (Liquid Crystal Polymer) which is a material having a relative dielectric constant of around 4.

  A side wall portion 26 of the housing body 2 is provided with a slide member 5 that can slide along the side surface and a coil-shaped discharge spring (not shown) that expands and contracts as the slide member 5 slides. The discharge spring has one end in contact with the back wall portion 25 and the other end in contact with the slide member 5, and biases the slide member 5 in the discharge direction. The slide member 5 is configured to be slidable in the insertion and discharge directions while being urged by the discharge spring.

  A heart cam groove 51 (see FIG. 7) is formed on the upper surface on the front end side of the slide member 5, and the position of the slide member 5 is defined by the heart cam groove 51 and the latch pin 6 provided on the front end side of the side wall portion 26. The The latch pin 6 extends along the side wall part 26, and both ends are bent at substantially right angles downward. One end of the latch pin 6 is rotatably supported on the front end side of the side wall portion 26, and the other end is slid on the heart cam groove 51 of the slide member 5.

  The heart cam groove 51 is formed in a heart-shaped annular shape having a plurality of steps and slopes, and slides the other end of the latch pin 6 in one direction in accordance with the slide of the slide member 5. When the slide member 5 is pushed into the mounting position in the vicinity of the back wall portion 25, the other end of the latch pin 6 is locked to the locking portion of the heart cam groove 51, and the return of the slide member 5 due to the bias of the discharge spring is restricted. The When the slide member 5 is further pushed from this state, the latched state between the latch pin 6 and the heart cam groove 51 is released, and the slide member 5 is returned by the bias of the discharge spring. Thus, the latch pin 6 and the heart cam groove 51 have a holding function at the mounting position of the slide member 5.

  The slide member 5 is provided with a metallic leaf spring 52 extending forward from the rear end side as a base end. On the front end side of the leaf spring 52, an engaging portion 53 is formed by bending a part of the plate surface inwardly toward the inside of the housing. The slide member 5 is slid integrally with the thick cards 8 and 9 by the locking portions 53 locking the notches 85 and 95 of the thick cards 8 and 9 inserted in the housing. When the thin card 7 having no notch is inserted into the housing, the slide member 5 and the thin card 7 are slid integrally with the locking portion 53 elastically contacting the card side surface.

  On the rear end side of the slide member 5, a protruding portion 54 that protrudes toward the center of the housing is formed. The front end side of the protrusion 54 is inclined at about 45 degrees so as to follow the inclination of the inclined surfaces 71, 81, 91 of the cards 7, 8, 9. Further, the base end side of the leaf spring 52 is inclined along the inclined surfaces 71, 81, 91 of the cards 7, 8, 9 together with the inclination of the protruding portion 54. By the inclined portion of the protruding portion 54 and the inclined portion on the proximal end side of the leaf spring 52, the cards 7, 8, and 9 are guided to the mounting position only during normal insertion, so that erroneous mounting of the card is prevented.

  The cover 3 is formed by bending a metal plate material, and a pin presser 31 for pressing the latch pin 6 is formed on the upper plate portion corresponding to the side wall portion 26. The pin presser 31 is a cantilever spring cut and raised toward the bottom wall portion 22, and presses the intermediate portion of the latch pin 6 to press the other end of the latch pin 6 against the heart cam groove 51. Further, a lock portion 32 that locks the opening of the leaf spring 52 to the outside at the mounting position is formed behind the pin presser 31. Although the details will be described later, the lock portion 32 prevents the card spring 52 from being forcibly removed by suppressing the outward opening of the leaf spring 52.

  With reference to FIG. 3, a pair of differential signal terminals, which is a characteristic part of the present embodiment, will be described. FIG. 3 is a schematic diagram around a pair of differential signal terminals according to the present embodiment. FIG. 4 is a perspective view around a pair of differential signal terminals according to the present embodiment.

  As shown in FIG. 3, the pair of differential signal terminals 41 corresponds to differential transmission for transmitting a signal (data) using a potential difference between signals transmitted between adjacent terminals. This is a contact terminal for the pad 94a. The pair of differential signal terminals 41 is formed symmetrically with reference to a virtual cross section A passing through the midpoint between the terminals in the terminal extending direction. Each differential signal terminal 41 has a spring portion 42 extending from the terminal holding portion 23 to the back of the housing. The distal end portion of the spring portion 42 is divided into two forks, with one piece being elongated and the other piece being wide and short. One piece of the spring portion 42 is curved upward to form a contact portion 43 that contacts the pad 94a of the thick card 9. The other piece of the spring portion 42 is curved upward and serves as a contact portion 44 that contacts the partition wall 83 on the back surface of the card when the thick card 8 that does not support differential transmission is mounted.

  As shown in FIG. 4, the abutting portion 44 abuts against the partition wall 83 disposed between the pads 84 of the thick card 8 to push down the differential signal terminal 41. As a result, the contact portion 43 is moved away from the back surface of the thick card 9 and the contact pressure between the contact portion 43 and the back surface of the thick card 8 is relaxed. Further, the side surface of the contact portion 43 and the inner side surface of the partition wall 83 are not in contact with each other. Therefore, when the thick card 8 that does not support differential transmission is mounted, the card back surface and the contact portion 43 do not slide strongly, and wear of the contact portion 43 is effectively prevented. Furthermore, since the side surface of the contact part 43 does not contact the inner side surface of the partition wall 83, the contact part 43 is prevented from being deformed and the inner side surface of the partition wall 83 is prevented from being damaged.

  Each differential signal terminal 41 has a soldering portion 45 drawn from the terminal holding portion 23 to the front of the housing. The soldering portion 45 is drawn downward from the upper surface of the bottom wall portion 22 and soldered to the mounting board of the electronic device. The width dimension of the soldering part 45 is formed smaller than the width dimension of the spring part 42. The spring part 42 and the soldering part 45 are connected by a shape changing part 46 whose width dimension gradually decreases from the spring part 42 toward the soldering part 45. In a pair of adjacent differential signal terminals 41, the facing inward side surface 47 of the shape changing portion 46 is gently inclined, and the outward side surface 48 is greatly inclined.

  On the side surface 48 of each differential signal terminal 41, a cut mark 49 of a connecting bar with the adjacent contact terminal 4a remains. The cut marks 49 are located at two places in the front and rear away from the shape changing portion 46.

  By the way, although differential transmission is performed in the pair of differential signal terminals 41, if there is a shape that causes a significant change in impedance between the input end and the output end of the terminal, the return loss and the inserter due to this shape. Loss occurs. When the return loss and the insertion loss are large, the differential signal waveform is crushed and it is difficult to discriminate data. As a result of investigating the causes of return loss and insertion loss, the present inventor has found that impedance mismatch occurs due to a change in terminal shape. Therefore, in the present embodiment, a large change in impedance is suppressed by holding the shape changing portion 46 having a large impedance change in the terminal holding portion 23 as a dielectric.

Hereinafter, a configuration for suppressing a change in impedance between the differential signal terminals will be described. The impedance is obtained by inductance and capacitance as represented by the following equation (1). Here, in Expression (1), Z represents impedance, L represents inductance, and C represents capacitance.
Z = √ (L / C) (1)

Further, the capacitance is determined by the thickness and length of the shape changing portion 46, the dielectric constant of the inclusion between the opposing side surfaces 47, and the interval between the opposing side surfaces 47, as represented by the following equation (2). Here, in Expression (2), t is the thickness (thickness dimension) of the shape changing portion 46, dx is the minute length of the shape changing portion 46, ε is the dielectric constant, and W is the distance between the side surfaces 47 (width dimension). (Refer to FIG. 3). Note that the total capacitance in the range surrounded by the dielectric is obtained by integrating the capacitance by the dielectric length.
C = t · dx · ε / W (2)

For example, when it is set as the structure where the shape change part 46 of this Embodiment is not hold | maintained at the terminal holding | maintenance part 23, a shape change part is exposed in the air. In this case, since the dielectric constant ε _{air of air} is small, the capacitance is strongly influenced by the change in terminal shape (terminal spacing). Specifically, as shown in FIG. 5, the capacitance C _air greatly decreases toward the soldering portion 45. As a result, the impedance changes greatly and the return loss and insertion loss increase.

On the other hand, in the present embodiment, the shape change portion 46 is held by a synthetic resin having a dielectric constant higher than that of air, thereby reducing the influence of terminal shape change (terminal spacing) acting on the capacitance. A synthetic resin is interposed between the side surfaces 47 of the shape changing portion 46, and the dielectric constant ε _resin of the synthetic resin is larger than the dielectric constant ε _{air of air} . Therefore, as shown in FIG. 5, the amount of decrease in the capacitance C _resin is suppressed as compared with the configuration in which the shape change portion is exposed to the air. As described above, in this embodiment, the portion where the capacitance is reduced due to the change in the terminal shape is held by the synthetic resin, thereby suppressing the significant change in the capacitance and suppressing the change in the impedance.

  Next, as shown in FIG. 6A, the impedance characteristic was examined by three-dimensional electromagnetic field analysis by changing the holding position of the differential signal terminal 41 by the terminal holding unit 23, and the result shown in FIG. 6B was obtained. The proximal end side of the spring portion 42 of the pair of differential signal terminals 41 has a constant width dimension and is a parallel portion having side surfaces formed in parallel to adjacent terminals. When this parallel portion is held by the synthetic resin, the amount of change in impedance near the shape changing portion 46 is large as shown by the broken line W1. Specifically, it increases from about 190 [Ω] to about 200 [Ω], then decreases to about 100 [Ω], increases again, and is stable at about 140 [Ω]. On the other hand, when the shape change portion 46 of the pair of differential signal terminals 41 is held by synthetic resin, the amount of change in impedance near the shape change portion 46 is suppressed as indicated by the solid line W2. Specifically, after decreasing from about 190 [Ω] to about 130 [Ω], it increases again and stabilizes at about 140 [Ω].

  As described above, in the present embodiment, the shape change portion 46 is held by the synthetic resin, so that the impedance drop is greatly suppressed compared to the configuration in which only the parallel portion is held by the synthetic resin. And the slope of the change is reduced. In the present embodiment, since the cutting trace 49 remains at a position away from the shape changing portion 46 and on the side surface opposite to the side surface facing each other, the impedance is affected by the cutting trace 49. There is no. Further, the side surfaces corresponding to each other can be formed in parallel. Furthermore, since the width dimension of the shape changing portion 46 is gradually changed by the inclined surfaces 47 and 48, a rapid change in impedance is suppressed as compared with the case where the width dimension changes abruptly.

  In the present embodiment, the pair of shape changing portions 46 are entirely held by the synthetic resin, but the present invention is not limited to this. It is only necessary that the impedance change can be moderated, and it is sufficient that the synthetic resin is interposed at least between a part of the side surfaces 47 facing each other of the pair of shape changing portions 46.

  In the present embodiment, the side surfaces 47 and 48 of the shape changing portion 46 are inclined. However, the present invention is not limited to this. The shape changing portion 46 may have any shape as long as the spring portion 42 and the soldering portion 45 are connected to each other. For example, as shown in FIG. 13A, the side surfaces 47 and 48 of the shape changing portion 46 may be formed to be curved. Further, as shown in FIG. 13B, the side surfaces 47 and 48 of the shape changing portion 46 may be formed in a shape in which a plurality of straight lines (two straight lines in the figure) are folded. In this case, the side surfaces 47 and 48 are formed to be inclined in two stages by the side surfaces 47a and 48a having a shallow inclination angle and the side surfaces 47b and 48b having a deep inclination angle. Even with these configurations, in the pair of adjacent differential signal terminals 41, the width dimensions of the side surfaces 47 and 48 of the shape changing portion 46 can be gradually changed, and the influence of impedance on signal transmission can be reduced. In the first modification shown in FIG. 13, the same reference numerals are assigned to the same names as in the present embodiment for convenience of explanation.

  In the present embodiment, the shape changing portion 46 is formed by changing the width dimension of the pair of differential signal terminals 41. However, the present invention is not limited to this. The shape changing part 46 only needs to be formed so that the width dimension or the thickness dimension of the one end side and the other end side sandwiching the shape changing part 46 is matched. For example, the shape changing part 46 changes the shape by changing only the thickness dimension. A portion 46 may be formed. Here, the width dimension indicates the interval between the side surfaces of the differential signal terminal 41, and the thickness dimension indicates the thickness t (vertical direction) of the pair of differential signal terminals 41 in the thickness direction. Is.

  In the present embodiment, the synthetic resin is interposed between the pair of shape changing portions 46 to suppress the change in impedance. However, the present invention is not limited to this. For example, instead of the synthetic resin according to the present embodiment, it is possible to further suppress a change in impedance by using a material having another dielectric constant. Further, it is possible to suppress a change in impedance by partially adjusting the thickness of the terminal holding portion 23. Furthermore, it is possible to suppress a change in impedance by adjusting the thickness of the terminal holding portion 23 in a top view.

  For example, as shown in FIGS. 14A and 14B, the terminal holding portion 23 may be formed so as to increase in thickness from the spring portion 42 side toward the soldering portion 45 side in the shape changing portion 46. As described above, the capacitance decreases from the spring portion 42 side toward the soldering portion 45 side due to the influence of the shape change (terminal interval). For this reason, the change in capacitance can be moderated by adjusting the thickness of the terminal holding portion 23 according to the change in the terminal interval. Therefore, the change in impedance can be adjusted with higher accuracy than the configuration in which the terminal holding portion 23 is formed with a constant thickness.

  In addition, it is possible to suppress a change in impedance by adjusting the thickness of the shape changing portion 46. For example, as shown in FIGS. 14C and 14D, the thickness of the shape changing portion 46 may be formed so as to decrease from the spring portion 42 side toward the soldering portion 45 side. Even in such a configuration, it is possible to adjust the change in impedance more accurately than in the configuration in which the capacitance change is moderated and the terminal holding portion 23 is formed with a constant thickness. In the second modification shown in FIG. 14, the same reference numerals are assigned to the same names as in the present embodiment for the convenience of explanation.

  Moreover, in this Embodiment, although a pair of shape change part 46 was formed symmetrically on the basis of the virtual cross section A, it is not limited to this. The pair of shape changing portions 46 can suppress a change in impedance even when asymmetric. Moreover, in this Embodiment, although the upper surface of a pair of shape change part 46 is exposed, you may be covered with the synthetic resin. For example, as shown in FIGS. 15A and 15B, the outer surfaces of the pair of shape changing portions 46 may be covered from the periphery with a synthetic resin (terminal holding portion 23) except for the plurality of presser holes 29. The presser hole 29 is a hole formed by a presser pin that supports the contact terminal 4a in the mold during insert molding.

  In the configuration in which the shape changing portion 46 is covered from the periphery by the synthetic resin, even if a part of the shape changing portion 46 on the spring portion 42 side is exposed from the upper surface of the terminal holding portion 23 as shown in FIGS. 15C and 15D. Good. In this case, the substantially half part on the soldering part 45 side is exposed so that the substantially half part 46a on the spring part 42 side is exposed from the upper surface of the terminal holding part 23 by bending in the thickness direction provided in the shape changing part 46. It is positioned at a position higher than 46b. Since the substantially half part 46a on the spring part 42 side is located at the upper end of the terminal holding part 23, the spring part 42 can be sufficiently separated from the installation board on which the housing body 2 is installed. Thus, the spring part 42 is separated from the installation board by an amount corresponding to the increase in the thickness of the terminal holding part 23, thereby preventing the spring part 42 and the installation board from colliding with each other. In the third modification shown in FIG. 15, for convenience of explanation, the same reference numerals are assigned to the same names as in the present embodiment.

  In the present embodiment, the synthetic resin is entirely interposed between the side surfaces 47 of the pair of shape changing portions 46. However, the present invention is not limited to this configuration. As shown to FIG. 16A, it is good also as a structure which a synthetic resin interposes at least one part between the side surfaces 47 of a pair of shape change part 46. FIG. Even with such a configuration, a rapid change in impedance can be suppressed. For example, as shown in FIG. 16B, when the synthetic resin is partially interposed between the pair of side surfaces 47, the change in impedance is suppressed as compared with the case where the synthetic resin is not interposed between the pair of side surfaces 47.

  Specifically, when the synthetic resin does not intervene between the pair of side surfaces 47, as shown by a broken line W3, from the position P1 on the spring portion 42 side of the shape changing portion 46 to the position P2 on the soldering portion 45 side. Impedance rises. Therefore, the impedance mismatch becomes large. On the other hand, when the synthetic resin is partially interposed between the pair of side surfaces 47, the impedance decreases from the position P1 on the spring part 42 side where the synthetic resin is interposed toward the intermediate position P3 as indicated by the solid line W4. To do. Thereafter, the impedance increases from a midway position P3 where no synthetic resin is interposed toward a position P2 on the soldering portion 45 side. As described above, when the synthetic resin is interposed in at least a part between the pair of side surfaces 47, the impedance mismatch is reduced by partially reducing the impedance. In addition, in the 4th modification shown in FIG. 16, the same code | symbol is attached | subjected about the same name as this Embodiment for convenience of explanation.

  In the present embodiment, both side surfaces 47 and 48 of the pair of shape changing portions 46 are formed symmetrically with respect to the imaginary cross section A, but the present invention is not limited to this configuration. As shown in FIG. 17A, the inner side surfaces 47 of the pair of shape changing portions 46 may be formed symmetrically with respect to the virtual cross section A, and the outer side surfaces 48 may be formed asymmetric with respect to the virtual cross section A. This is because, as shown in FIG. 17B, the density of the lines of electric force differs between the inside and the outside of the pair of differential signal terminals 41. That is, the lines of electric force generated between the conductors are dense inside the pair of differential signal terminals 41, and the lines of electric force generated between the conductors are sparse outside the pair of differential signal terminals 41. Therefore, even if the outer side surfaces 48 of the pair of shape changing portions 46 are formed asymmetrically, the influence on the impedance is small. The entire inner surface including the side surface 47 of the pair of differential signal terminals 41 is formed symmetrically with respect to the virtual cross section A, and the entire outer surface including the side surface 48 is not limited to between the side surfaces 47 of the shape changing portion 46. It may be formed asymmetrically with respect to the virtual cross section A. In addition, in the 5th modification shown in FIG. 17, the same code | symbol is attached | subjected about the same name as this Embodiment for convenience of explanation.

  Next, the lock configuration of the connector device will be described with reference to FIG. FIG. 7 is a perspective view of the lock portion and the slide member of the connector device according to the present embodiment.

  As shown in FIG. 7, the leaf spring 52 is supported on the rear end side of the slide member 5, and in the initial state, the locking portion 53 is placed at a locking position where the notch 95 of the thick card 9 can be locked. Positioned. Moreover, the leaf | plate spring 52 can be moved to the separation position which spaced apart the latching | locking part 53 from the latching position by opening outside. For example, when the thick card 9 is inserted, the leaf spring 52 swings outward when the locking portion 53 is pushed out by the side of the card, and returns to the initial state when the locking portion 53 enters the notch 95. . A protrusion 55 is formed at the front end of the leaf spring 52 so as to protrude toward the cover 3 side.

  The cover 3 is provided with a lock portion 32 that prevents the leaf spring 52 from swinging outward when the slide member 5 is in the mounting position. The lock portion 32 is formed by supporting the restricting piece 35 along the plate surface of the leaf spring 52 with a pair of arm portions 36 and connecting the riding piece 37 to the lower end of the restricting piece 35. The restriction piece 35 extends in the front-rear direction, and is formed by being bent downward at the free ends of the pair of arm portions 36 at both front-rear ends. In this case, the regulating piece 35 is positioned so as to cover the back side of the leaf spring 52 facing the outside of the housing by the pair of arm portions 36. The riding piece 37 extends in the front-rear direction and is formed by being bent horizontally from the lower end of the regulating piece 35. The front end portion of the riding piece 37 is slightly raised obliquely upward, and is formed so as to easily ride on the protrusion 55 of the leaf spring 52.

  In the lock portion 32 configured in this manner, when the thick card 9 is in the ejection position, the restricting piece 35 is positioned on the base end side of the leaf spring 52 and allows the leaf spring 52 to swing. When the thick card 9 is in the mounting position, the restricting piece 35 is located on the front end side of the leaf spring 52 and restricts the swinging of the leaf spring 52. Therefore, the locking portion 53 of the leaf spring 52 is unlikely to come off from the notch 95 of the thick card 9 at the mounting position, and the thick card 9 is prevented from being forcibly removed. In this case, forcibly removing refers to preventing the card from being easily removed when an attempt is made to pull out the card in the mounting position. That is, when an attempt is made to pull out the card, the card is pulled out with a predetermined force (a force of about 4 to 10 N) that does not damage the card. Note that forcible removal of the thick card 8 that does not support differential transmission is also prevented by the same configuration.

  Further, in the lock portion 32, when the thin card 7 is in the ejection position, the regulating piece 35 is positioned on the proximal end side of the leaf spring 52 and allows the leaf spring 52 to swing. Here, since the thin card 7 is not formed with a notch, the leaf spring 52 moves to the mounting position while being opened outward. At this time, the riding piece 37 rides on the protruding portion 55 and escapes the lock portion 32 upward (see FIG. 9C). Further, the ride-on piece 37 rides on the plate spring 52, thereby causing the spring force of the lock portion 32 (arm portion 36) to act on the plate spring 52 in the return direction. Therefore, in the mounting position, the spring force of the leaf spring 52 and the lock portion 32 is applied to the side surface of the thin card 7, but no excessive force is applied to the thin card 7, and the lock portion 32 and the leaf spring 52 are prevented from being damaged or deformed.

  Hereinafter, the mounting operation of each card will be described with reference to FIGS. FIG. 8 is an explanatory diagram of the mounting operation of the thick card according to the present embodiment. FIG. 9 is an explanatory diagram of the mounting operation of the thin card according to the present embodiment. In FIGS. 8 and 9, for convenience of explanation, the cover is omitted except for the lock portion. In FIG. 8, a thick card corresponding to differential transmission is illustrated as an example of the thick card, but the mounting operation is the same for a thick card not compatible with differential transmission.

  First, the mounting operation of the thick card 9 will be described. As shown in FIG. 8A, when the slide member 5 is in the discharge position, the base end side of the leaf spring 52 is positioned on the restriction piece 35 and the leaf spring 52 is allowed to swing outward. In this state, when the thick card 9 is inserted into the connector device 1, the leaf spring 52 is opened outward by the locking portion 53 being pushed in by the card side surface. When the thick card 9 is brought into contact with the protruding portion 54 of the slide member 5, the locking portion 53 enters the notch 95, and the leaf spring 52 is restored to its original state. At this discharge position, the leaf spring 52 can swing without being restricted by the restriction piece 35, so that the thick card 9 can be inserted and removed.

  When the thick card 9 is further pushed in from the state of FIG. 8A, the thick card 9 and the slide member 5 are integrally moved to the mounting position as shown in FIG. 8B. When the slide member 5 is moved to the mounting position, the other end of the latch pin 6 is locked to the locking portion of the heart cam groove 51 and is held in the mounting position together with the thick card 9. When the slide member 5 is in the mounting position, the front end side of the leaf spring 52 is positioned on the restriction piece 35 and the swinging of the leaf spring 52 to the outside is restricted.

  Specifically, as shown in FIG. 8C, the restricting piece 35 is located on the back side of the leaf spring 52 facing the outside of the housing, so that the swinging range of the leaf spring 52 is closer to the thick card 9 than the restricting piece 35. Limited to If a force in the pulling direction is applied to the thick card 9 in this state, a force toward the outside of the housing acts on the leaf spring 52, but the swing of the leaf spring 52 is restricted within a predetermined range by the restriction piece 35. Is done. As described above, since the swing of the leaf spring 52 is restricted by the restriction piece 35, the locking portion 53 of the leaf spring 52 is not detached from the notch 95 of the thick card 9, and the thick card 9 is forcibly removed. Is prevented. At this time, when the thick card 9 is to be pulled out with a stronger force (predetermined force described above), the restricting piece 35 is lifted with respect to the leaf spring 52 than the arm portion 36 side, and the piece 37 side is further away. Due to the gentle inclination formed, the arm portion 36 is bent above the leaf spring 52, and the leaf spring 52 is not restricted by the restriction piece 35, and the pressure card 9 is pulled out. become.

  8B, when the thick card 9 is further pushed, the latched state of the latch pin 6 and the heart cam groove 51 is released, and the slide member 5 is pushed back to the discharge position by the discharge spring.

  Next, the mounting operation of the thin card 7 will be described. As shown in FIG. 9A, when the slide member 5 is in the discharge position, the base end side of the leaf spring 52 is positioned on the restriction piece 35 and the leaf spring 52 is allowed to swing outward. In this state, when the thin card 7 is inserted into the connector device 1, the leaf spring 52 is opened outward by pushing the locking portion 53 into the side surface of the card. Since the thin card 7 is not formed with a notch, the thin card 7 is brought into contact with the protruding portion 54 of the slide member 5 with the leaf spring 52 being opened outward. At this discharge position, only the spring force of the leaf spring 52 acts on the thin card 7, so that the thin card 7 can be inserted and removed.

  When the thin card 7 is further pushed in from the state of FIG. 9A, the thin card 7 and the slide member 5 are integrally moved to the mounting position as shown in FIG. 9B. When the slide member 5 is moved to the mounting position, the other end of the latch pin 6 is locked to the locking portion of the heart cam groove 51 and is held in the mounting position together with the thin card 7. In this case, since the slide member 5 moves to the mounting position with the leaf spring 52 opened outward, the projection 55 of the leaf spring 52 enters under the riding piece 37 and the lock portion 32 is pushed upward.

  Specifically, as shown in FIG. 9C, when the riding piece 37 rides on the protrusion 55 of the leaf spring 52, the lock portion 32 is lifted upward about the proximal end side of the arm portion 36. At this time, the lock portion 32 applies a spring force to the plate spring 52 on the card side surface side. That is, at the mounting position, the spring force of the leaf spring 52 and the lock portion 32 acts on the side surface of the thin card 7, and the thin card 7 is pressed against the side wall portion 27 of the housing body 2. In this state, when a force in the pulling direction is applied to the thin card 7, the spring force of the leaf spring 52 and the lock part 32 causes a resistance to pulling out the thin card 7. Further, the lock portion 32 and the leaf spring 52 are prevented from being damaged or deformed without applying excessive force to the thin card 7.

  9B, when the thin card 7 is further pushed, the latched state between the latch pin 6 and the heart cam groove 51 is released, and the slide member 5 is pushed back to the discharge position by the discharge spring.

  In the above-described embodiment, the lock portion 32 is formed on the upper plate portion of the cover 3, but the present invention is not limited to this. The lock portion 32 may be configured to be able to lock the leaf spring 52 of the slide member 5. For example, the lock portion 32 may be formed by extending the arm portion 36 from the side plate portion of the cover 3.

  As described above, according to the connector device 1 according to the present embodiment, since the synthetic resin as the dielectric is interposed between the shape change portions 46, the shape change (terminal interval) of the terminals acting on the impedance is reduced. The effect is reduced. Thereby, the impedance between the differential signal terminals 41 is appropriately adjusted, the insertion loss and the return loss are reduced, and the transmission efficiency of the connector device 1 is improved.

  In the above-described embodiment, the memory card is exemplified as the member to be attached to the connector device. However, the present invention is not limited to this, and any medium that supports differential transmission may be used.

  In addition, this invention is not limited to the said embodiment, It can change and implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

1 Connector device 2 Housing body (housing)
3 Cover (housing)
4a, 4b Contact terminal (terminal)
5 Slide member 9 Thick card (attached member, memory card)
23 Terminal holding part 32 Locking part 35 Restriction piece 36 Arm part 37 Riding piece 41 Differential signal terminal 42 Spring part 43 Contact part 44 Abutting part 45 Soldering part 46 Shape change part 47, 48 Side face 49 Cut trace 52 Leaf spring 94a 94b Pad (electrode)

Claims (9)

A housing capable of mounting a mounted member;
A plurality of terminals provided on the housing and connectable to electrodes of the mounted member;
A pair of adjacent terminals among the plurality of terminals is a pair of differential signal terminals corresponding to differential transmission,
In the middle part of the extending direction of the pair of differential signal terminals, the width dimension or the thickness dimension is different between the one end side and the other end side across the middle part. The shape change part where the width dimension or the thickness dimension changes as the process proceeds to is formed,
The pair of differential signal terminals is provided in the housing so that a dielectric is interposed between at least a part of the pair of shape changing portions ,
The pair of differential signal terminals are characterized in that cut traces of connecting bars to other terminals remain at positions separated from the pair of shape change portions on the side surfaces opposite to the side surfaces adjacent to each other. apparatus.   The connector device according to claim 1, wherein the housing is made of resin, and the dielectric is made of a part of the housing.   The connector device according to claim 2, wherein at least a part between the pair of shape changing portions is embedded in the housing. 4. The connector device according to claim 1, wherein a side surface of the differential signal terminal in the shape changing portion changes into a linear shape, a curved shape, or a shape in which straight lines are folded. 5. In the shape changing part, to any of claims 1 to 4, characterized in that varying the thickness of the width or thickness of the dielectric in accordance with the magnitude of the change in size of the differential signal terminals The connector device as described. Said pair of shape-changing portion, claim from claim 1, characterized in that symmetrically formed a virtual cross-section through the middle point between the pair of differential signal terminals in the extending direction of the terminal as a reference The connector device according to any one of 5 . The side surfaces adjacent to each other of the pair of shape changing portions are formed symmetrically with respect to a virtual cross section passing through a midpoint between the pair of differential signal terminals in the extending direction of the differential signal terminals. The connector device according to any one of claims 1 to 5 . In the middle part of the extending direction of the pair of differential signal terminals, the width dimension is different between one end side and the other end side across the middle part, and the shape changing part is the other end from the one end side in the middle part. It is formed so that the width dimension changes as it goes to the side,
According to any one of claims 1 to 7, wherein the pair of differential signal terminals so that at least a part in the dielectric is interposed between the pair of shape-changing portion is provided on the housing Connector device. 9. The connector device according to claim 1, wherein the mounted member is a memory card.

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