JP2015008197A - Erroneous insertion prevention mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an erroneous insertion prevention mechanism which enables successful insertion of a module substrate to a corresponding base substrate.SOLUTION: A process control controller comprises: a base substrate 1; a module 2 attached to the base substrate 1; and a limiting member 3 attached to the base substrate 1. The limiting member 3 includes: a base part 31; an engagement part 32 projected from one end of a bottom face 31d of the base part 31; and a leaf spring part 33 projected from the other end of the bottom face 31d. The base part 31 has slant faces 31b, 31c which are slanted with respect to a direction perpendicular to the base substrate 1 in a plane parallel with a module substrate 22. The slant faces 31b, 31c are arranged in an opposite manner to a notch 22b of the module substrate 22.

Description

  The present invention relates to an erroneous insertion prevention mechanism.

  Conventionally, for example, a process control controller or the like includes a module substrate provided with an electronic circuit for performing a specific process, and a base substrate provided with an input / output circuit, a communication circuit, a power supply circuit, and the like. The structure which inserts the connector provided in the module into the connector is proposed. Here, there are a plurality of types of module boards depending on the processing content and the like, and the shape of the connector differs depending on the type, and input / output signals are different. For this reason, the module substrate may be damaged unless the corresponding module substrate is inserted. Therefore, a mechanism for preventing erroneous insertion of the module substrate has been proposed (for example, see Patent Document 1).

  For example, Patent Document 1 proposes a configuration in which a bowl-shaped terminal case having an upper opening is disposed on a base substrate, and a module substrate covered with a housing is inserted and fitted through the opening. Here, on the inner side surface inside the opening of the terminal case and the contact surface of the housing of the module inserted into the terminal case, an engaging portion made of a concave portion or a convex portion parallel to the module insertion / extraction direction is formed. . This engaging part is inserted into the concave part by appropriately inserting a key or cutting the convex part so that the concave part and the convex part engage with each other only when the module inserted into the terminal case corresponds. Is set to

JP 2000-311005 A

  However, in the above-described mechanism, since the user inserts the key and cuts the convex portion, these operations may be mistaken. As a result, even the correct module substrate to be inserted cannot be inserted into the terminal case.

  Accordingly, an object of the present invention is to provide an erroneous insertion prevention mechanism that can reliably insert a module substrate into a corresponding base substrate.

  In order to solve the problems as described above, an erroneous insertion prevention mechanism according to the present invention includes a base substrate having a first connector and a second connector inserted into the first connector, A notch is formed in the opposite side edge, and a module substrate standing with respect to the base substrate by inserting the second connector into the first connector, and a position facing the module substrate on the base substrate, A notch restricting member, comprising a restricting member that is movably attached in a direction along a side edge of the module substrate, protrudes toward the module substrate, and restricts insertion of the module substrate into the first connector base substrate. The surface opposite to the surface of the module substrate or the surface facing the notch of the regulating member is formed obliquely with respect to the direction perpendicular to the base substrate in a plane parallel to the plane of the module substrate. It is characterized in.

  In addition, another erroneous insertion prevention mechanism according to the present invention includes a base substrate having a first connector and a second connector inserted into the first connector, and the second connector is used as the first connector. A module substrate that is erected with respect to the base substrate by insertion, and a housing having an open bottom, accommodates the module substrate therein, and inserts the second connector into the first connector. And a case in which a notch is formed in the side edge portion facing the base substrate, and a position facing the case on the base substrate so as to be movable in a direction along the side edge portion of the case, A regulating member that protrudes toward the case and regulates insertion of the case into the first connector base board, and a surface that faces the regulating member of the notch or a surface that faces the notch of the regulating member, And it is characterized in that it is formed obliquely with respect to the direction perpendicular to the base substrate in a plane parallel to the plane of the module substrate.

  In the erroneous insertion prevention mechanism, the notch is formed in a substantially trapezoidal shape in a plane parallel to the plane of the module substrate, and the regulating member is formed in a substantially rectangular shape in a plane parallel to the plane of the module substrate. May be.

  According to the present invention, the surface of the notch facing the regulating member or the surface facing the notch of the regulating member is formed obliquely with respect to the direction perpendicular to the base substrate in a plane parallel to the plane of the module substrate. Therefore, when the corresponding module substrate is moved toward the base substrate in order to connect the second connector to the first connector, the opposing surface and the notch or the regulating member come into contact with each other, The restricting member moves along the shape. Accordingly, the position of the restricting member is automatically set without depending on the user, so that the module substrate can be reliably inserted into the corresponding base substrate.

FIG. 1 is a cross-sectional view of the main part showing the configuration of the process control controller. FIG. 2 is a plan view of FIG. 3 is a cross-sectional view taken along line II-II in FIG. FIG. 4 is a perspective view schematically showing the configuration of the regulating member. FIG. 5 is a cross-sectional view of the main part for explaining the setting operation of the restricting member. FIG. 6 is a cross-sectional view of a main part for explaining the setting operation of the restricting member. FIG. 7 is a cross-sectional view of an essential part for explaining erroneous insertion of a module. FIG. 8 is a view for explaining a modified example of the notch and the regulating member. FIG. 9 is a view for explaining a modification of the notch and the regulating member. FIG. 10 is a diagram for explaining a modified example of the module. 11 is a cross-sectional view taken along line III-III in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this embodiment, a case where the present invention is applied to a process control controller will be described as an example.

  The process control controller shown in FIG. 1 includes a base substrate 1, a module 2 attached to the base substrate 1, and a regulating member 3 attached to the base substrate 1. Note that the base substrate 1 and the regulating member 3 in FIG. 1 correspond to a cross-sectional view taken along line II in FIG.

  As shown in FIG. 2, the base substrate 1 is a printed board having a substantially rectangular shape in plan view, and includes a terminal block and a connector (not shown) having power supply terminals and GND terminals connected to the printed wiring. A female connector 11 into which a connector 23 (to be described later) of the module 2 is inserted is provided at a substantially central portion of the upper surface of the base substrate 1. An attachment portion 12 to which the restriction member 3 is attached is formed between one short side portion of the base substrate 1 and the connector 11. The attachment portion 12 is provided in the vicinity of a pair of long holes 121 a and 121 b that are substantially rectangular in plan view parallel to the long side of the base substrate 1, and the long hole 121 b between the long hole 121 b and one long side of the base substrate 1. Three small holes 122a to 122c that are formed and are substantially circular in plan view and spaced apart from each other in the extending direction of the long side of the base substrate 1 (hereinafter referred to as “first direction”) are formed. Here, in the first direction, the small hole 122b is located at the center of the long holes 121a and 121b. Similarly, the small hole 122a is located between one end part and the central part of the long holes 121a and 121b, and the small hole 122c is located between the other end part and the central part of the long holes 121a and 121b. In the present embodiment, the small hole 122b has a smaller diameter than the small holes 122a and 122c.

  The module 2 includes a housing 21, a module substrate 22 accommodated in the housing 21, and a connector 23 fixed to the module substrate 22.

  The housing | casing 21 is a rectangular parallelepiped member which the bottom part formed, for example from resin opened.

The module board 22 is a plate-like printed board having a substantially rectangular shape in plan view, and is mounted with an electronic circuit (not shown) that performs various arithmetic processes. Such a module substrate 22 is housed inside the housing 21 in a state perpendicular to the opening surface of the housing 21 inside the housing 21.
In addition, a long rectangular portion 22 a of the module substrate 22 facing the opening surface of the housing 21 is formed with a substantially rectangular cutout 22 b in the vicinity of one end portion.

  The connector 23 is a male connection terminal corresponding to the connector 11, and electrically connects the module substrate 22 and the base substrate 1 in cooperation with the connector 11 that can be inserted into the connector 11. Such a connector 23 has a main body portion 23a composed of a substantially rectangular parallelepiped housing attached in the vicinity of the long side portion 22a of the module substrate 22, and one long side portion supported by the main body portion 23a, and the other long side. And a plate-like connecting portion 23b having a substantially rectangular shape in plan view, the portion projecting toward the opening surface of the housing 21.

  As shown in FIGS. 3 and 4, the regulating member 3 includes a base portion 31, an engaging portion 32 protruding from one end portion of the bottom surface 31 d of the base portion 31, and a leaf spring portion protruding from the other end portion of the bottom surface 31 d. 33. Such a regulating member 3 can be manufactured by, for example, resin injection molding.

  The base portion 31 has a substantially hexagonal shape cut into a triangular prism shape from a substantially central portion of the upper surface of the rectangular parallelepiped to a substantially central portion of the pair of side surfaces, in other words, a shape in which the rectangular parallelepiped is connected to the side surface including the bottom bottom of the trapezoidal column. Therefore, a pair of substantially rectangular side surfaces (hereinafter referred to as “slopes”) 31b and 31c adjacent to a substantially rectangular side surface (hereinafter referred to as “upper surface”) 31a including the upper base of the trapezoidal column are The upper surface 31a is obliquely connected.

  The engaging portion 32 is erected from the end on the side surface 31e side of the pair of side surfaces 31e and 32f perpendicular to the top surface 31a and the inclined surfaces 31b and 31c on the bottom surface 31d having a substantially rectangular shape on the opposite side to the top surface 31a. A plate-like foot portion 32a, a plate-like projection portion 32b projecting from the end portion of the foot portion 32a on the side opposite to the side surface 32f and perpendicular to the foot portion 32a, and the projecting portion And a hemispherical projection 32c formed on the upper surface of 32b.

  The plate spring portion 33 includes a plate-like foot portion 33a erected from the end portion on the side surface 31f side of the bottom surface 31d, and the end portion of the foot portion 33a on the side opposite to the side surface 31e and on the foot portion 33a. It has a plate-like claw portion 33b protruding in a direction perpendicular to it. Here, in the foot portion 33a, a portion adjacent to the engaging portion 32 side of the bottom surface 31d is cut out toward the top surface 31a. As a result, the foot 33a can be easily elastically deformed in the direction toward the engaging portion 32.

As shown in FIG. 3, such a restricting member 3 includes a protrusion 32 b of the engaging portion 32 inserted into the long hole 121 b from the upper surface side of the base substrate 1, and then a claw portion of the leaf spring portion 33 in the long hole 121 a. 33b is press-fitted, and the leg portion 33a is inserted into the long hole 121a while being elastically deformed. Then, in the restricting member 3, the bottom surface 31 d of the base portion 31 abuts on the upper surface of the base substrate 1, and the protruding portion 32 b of the engaging portion 32 and the claw portion 33 b of the leaf spring portion 33 abut on the lower surface of the base substrate. Thereby, the regulating member 3 is sandwiched between the base substrate 1 by the bottom surface 31b, the protruding portion 32b, and the claw portion 33b. At this time, the restriction member 3 is formed in a rectangular parallelepiped shape with the long holes 121a and 121b through which the foot part 32a of the engaging part 32 and the foot part 33a of the leaf spring part 33 are inserted, so that the long holes 121a and 121b are formed. It is possible to move in the extending direction.
Here, when the regulating member 3 is moved to a position where the convex portion 32c faces any one of the small holes 122a to 122c, the convex portion 32c is fitted into the small holes 122a to 122c facing each other. In the present embodiment, the small holes 122a and 122c are formed with a larger diameter than the convex part 32c, and the small hole 122b is formed with a smaller diameter than the convex part 32c. Therefore, when the convex portion 32c is opposed to the small hole 122b, the regulating member 3 is movable in the extending direction because the peripheral surface of the convex portion 32 is in contact with the opening edge of the small hole 122b. It becomes. On the other hand, when the convex portion 32c is opposed to the small holes 122a and 122c, the convex portion 32 is inserted into the small hole 122b and is fitted therein, so that it is difficult to move in the extending direction.

<Operation of incorrect insertion prevention mechanism>
Next, the operation of the erroneous insertion prevention mechanism according to this embodiment will be described.
In the erroneous insertion prevention mechanism according to the present embodiment, first, a setting operation for setting the position of the regulating member 3 is performed.

  First, a base substrate 1 to which the regulating member 3 is attached and a module 2 to be inserted into the base substrate 1 are prepared. At this time, the restricting member 3 is disposed at a position where the convex portion 32c faces the small hole 122b. Thereby, the regulating member 3 can move in the extending direction of the long holes 121a and 121b.

  Next, as shown in FIG. 1, the module 2 is positioned above the base substrate 1, and the connector 11 and the connector 23 are arranged to face each other. At this time, the long side portion 22 a of the module substrate 22 faces the restriction member 3, and the end of the notch 22 b faces the slopes 31 b and 31 c of the restriction member 3.

  Subsequently, the module 2 is moved toward the base substrate 1, and the connector 23 b of the connector 23 is inserted into the connector 11. At this time, as shown in FIG. 5, the end portion of the notch 22 b of the module substrate 22 contacts the inclined surface 31 b of the regulating member 3. As the module 2 moves, the slope 31b is pressed by the end of the notch 22b. As described above, the restricting member 3 is movable in the extending direction of the long holes 121a and 121b, that is, in the first direction. Therefore, when the module 2 further moves and the inclined surface 31b is pressed by the end portion of the notch 22b, the force that moves the regulating member 3 toward the other inclined surface 31c, that is, the left side in the drawing by the inclined surface 31b. The restriction member 3 moves to the left side by this force.

When the connecting portion 23b of the connector 11 and the connector 23 is inserted and the connector 11 and the connector 23 are connected, as shown in FIG. 6, the regulating member 3 is housed in the notch 22b. At this time, the convex portion 32c is fitted in the small hole 122a. As a result, the regulating member 3 becomes difficult to move in the first direction. Therefore, even if the module 2 is removed from the base substrate 1, the restricting member 3 remains at a position where the convex portion 32c is fitted in the small hole 122a.
The position of the restricting member 3 is set by the above procedure.

  When the corresponding module 2 to be connected to the base substrate 1 is attached after the position of the restricting member 3 is set by the above-described procedure, the module 2 is moved toward the base substrate 1 to connect the connector 23 to the connector 11. When the connection portion 23b is to be inserted, the regulating member 3 is disposed opposite to the notch 22b, so that the regulating member 3 is accommodated in the notch 2. As a result, the module 2 can be further moved toward the base substrate 1, so that the connecting portion 23 b of the connector 23 is inserted into the connector 11, and the connector 11 and the connector 23 are connected.

  On the other hand, as shown in FIG. 7, when attaching a module 2 ′ that should not be connected to the base substrate 1, the module 2 ′ is moved toward the base substrate 1 to connect the connector 11 to the connector 11. When trying to insert 23 b, the regulating member 3 does not face the notch 22 b ′ of the module 2 ′, so that the regulating member 3 comes into contact with the long side portion 22 a of the module substrate 22. For this reason, since the module 2 cannot be moved further toward the base substrate 1, the connecting portion 23 b of the connector 23 cannot be inserted into the connector 11. As a result, it is possible to prevent erroneous insertion of the module 2 ′ that does not correspond to the base substrate 1.

  As described above, according to the present embodiment, since the notch or the regulating member 3 has the inclined surfaces 31b and 31c, the module 2 corresponding to the base substrate 1 is connected to connect the connector 23 to the connector 11. If it moves, slope 31b, 31c and the notch 22b will contact, and the regulating member 3 will move along the shape of slope 31b, 31c. Thereby, since the position of the regulating member 3 is automatically set regardless of the user, the module substrate 22 can be reliably inserted into the corresponding base substrate 1.

  In the present embodiment, the case where the inclined surfaces 31 b and 31 c are provided on the regulating member 3 as an example of a surface formed obliquely with respect to a direction perpendicular to the base substrate 1 in a plane parallel to the plane of the module substrate 22 is taken as an example. Although described, the end may be provided on the module substrate 22 as shown in FIG. In this case, of the end surfaces continuous with the long side portion 22a of the notch 22b of the module substrate 22, the end surface 22c near the connector 23 is perpendicular to the base substrate 1 in a plane parallel to the plane of the module substrate 22. Are formed diagonally. Further, the base portion 31 ′ of the regulating member 3 is formed in a rectangular parallelepiped shape. Even in this case, when the corresponding module 2 is moved toward the base substrate 1 in order to connect the connector 23 to the connector 11, the regulating member 3 moves along the shape of the end face 22c and the base portion 31′c. Since the position of the regulating member 3 is automatically set regardless of the user, it is possible to prevent erroneous insertion more reliably.

  Further, as shown in FIG. 9, the end surface 22 d that is not near the connector 23 among the end surfaces continuous with the long side portion 22 a of the notch 22 b of the module substrate 22 is along the planar direction of the module substrate 22, and Needless to say, it may be formed obliquely with respect to the normal direction of the base substrate 1.

  Further, in the present embodiment, as an example, the inclined surfaces 31b and 31c made of a plane are provided as surfaces formed obliquely with respect to the direction perpendicular to the base substrate 1 in a plane parallel to the plane of the module substrate 22. Although described, the surface is not limited to a flat surface and may be a curved surface. Moreover, although the two inclined surfaces 31b and 31c are formed in the control member 3 as the surface, the number of surfaces is not limited to two and can be set freely as appropriate.

Further, in the present embodiment, the case where the notch 22b in which the regulating member 3 is accommodated is provided in the module substrate 22, but the place where the notch is formed is not limited to the module substrate. For example, FIG. As shown in FIG. 11, the housing 21 may be provided. In this case, the end portion 21 c far from the connector 23 among the end portions continuous with the notch 21 b in the long side portion 21 a facing the base substrate 1 of the housing 21 is in a plane parallel to the plane of the module substrate 22. Are formed obliquely with respect to the direction perpendicular to the base substrate 1. Moreover, this notch 21b is formed from the recessed part depressed in the thickness direction of the long side part 21a. Even in this case, when the corresponding module 2 is moved toward the base substrate 1 in order to connect the connector 23 to the connector 11, the regulating member 3 moves along the shape of the end portion 21c and the base portion 31 ′. Since the position of the regulating member 3 is automatically set regardless of the user, it is possible to prevent erroneous insertion more reliably.
10 and 11, even when the notch 21b is formed in the housing 21, the shape of the notch 21b and the regulating member 3 is not limited to this. For example, as in the present embodiment, Needless to say, the notch 21b may be formed in a substantially rectangular shape in plan view.

  The present invention can be applied to, for example, a process control controller.

  DESCRIPTION OF SYMBOLS 1 ... Base board | substrate, 2 ... Module, 3 ... Restriction member, 11 ... Connector, 12 ... Attachment part, 21 ... Housing | casing, 21a ... Long side part, 21b ... Notch, 21c ... End part, 22 ... Module board | substrate, 22a ... long side part, 22b ... notch, 22c ... end face, 23 ... connector, 23a ... main body part, 23b ... connection part, 31, 31 '... base part, 31a ... top face, 31b, 31c ... slope, 31d ... bottom face, 31e 32f ... side face 32 ... engaging part 32a ... foot part 32b ... projecting part 32c ... convex part 33 ... leaf spring part 33a ... foot part 33b ... claw part 121a, 121b ... long hole 122a -122c ... Small hole.

Claims (3)

A base substrate having a first connector;
A second connector to be inserted into the first connector, a notch is formed in a side edge facing the base substrate, and the second connector is inserted into the first connector to A module substrate standing on the base substrate;
The module board is mounted on the base board so as to be movable in a direction along the side edge of the module board at a position facing the module board, protrudes toward the module board, and connects to the first connector base board. A regulating member that regulates insertion of the module substrate,
The surface of the notch facing the restriction member or the surface of the restriction member facing the notch is formed obliquely with respect to a direction perpendicular to the base substrate in a plane parallel to the plane of the module substrate. This is a mechanism for preventing erroneous insertion. A base substrate having a first connector;
A module board that has a second connector inserted into the first connector, and is erected with respect to the base board by inserting the second connector into the first connector;
The side which consists of the housing | casing which the bottom part opened, accommodates the said module board | substrate in the inside, and is erected with respect to the said base board | substrate by inserting the said 2nd connector in the said 1st connector, and faces the said base board | substrate A case with a notch formed at the edge;
A position on the base substrate facing the case is movably attached in a direction along the side edge of the case, protrudes toward the case, and the case is connected to the first connector base substrate. A restriction member for restricting insertion,
The surface of the notch facing the restriction member or the surface of the restriction member facing the notch is formed obliquely with respect to a direction perpendicular to the base substrate in a plane parallel to the plane of the module substrate. This is a mechanism for preventing erroneous insertion. In the erroneous insertion prevention mechanism according to claim 1 or 2,
The notch is formed in a substantially trapezoidal shape in a plane parallel to the plane of the module substrate,
The erroneous insertion preventing mechanism, wherein the restricting member is formed in a substantially rectangular shape in a plane parallel to the plane of the module substrate.

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