JP2001024363A - Mechanism for preventing erroneous installation of electronic unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely prevent malfunction owing to erroneous installation by sliding a sliding board installed in a module case from a position shielding connection between a module connector and a base connector at the time of fitting an electronic module to a base unit. SOLUTION: A sliding board 24 which is buried in the groove of a module case fitting face and is formed by a spring material shielding the insertion of a base connector 3 is supported so that it can vertically slide. A spring 27 abutting on the sliding board 24 and the module case 2 is installed and the sliding board 24 is always kept in a shielding position with the energizing force. Since the shielding part of the sliding board 24 is always kept in the connector shielding position and the insertion of the base connector 3 is inhibited with such constitution, the lower projection 21 of the module case 2 is engaged with a lower engagement hole and installation is impossible when a lever 26 is not slid. Thus, erroneous installation can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing erroneous mounting of an electronic device integrally formed by engaging and fixing an electronic device module having a built-in electronic component in a base unit.

[0002]

2. Description of the Related Art FIG. 10 is a sectional side view of a conventional base unit in which an electronic device module is engaged and fixed. FIG. 11 is a perspective view showing a state in which the electronic device module is also engaged and fixed to the base unit. Is a side sectional view of the state in FIG. 11, and FIG. 13 is a side sectional view showing a state in which the electronic device module is erroneously mounted on the base unit from above.

In FIGS. 10 to 13, reference numeral 101 denotes a base unit main body having a lower engagement hole 111 for fixing a module case 102 and an upper engagement hole 112, and 102 engages with a lower engagement hole 111 at a lower end of the base unit. A module case for forming a projection 121 at a position and accommodating the printed circuit board 103; 103, a printed circuit board on which electronic components are mounted; 104, an electric connection with the printed circuit board 103;
It is a terminal block that is fixed to the module case with screws.

In the base unit main body 101, 11
1 is a lower engagement hole for fixing the module case 102, 1
12 is an upper engaging hole, 113 is a motherboard to which the arrayed base connectors 114 are soldered and fixed to the base unit main body 101 by screws, and 114 is a connector electrically connected to the module connector 131 on the printed circuit board 103. is there. These constitute the base unit body.

In the module case 102, 121
Is a projection provided at a position engaged with the lower engagement hole 111,
Reference numeral 122 denotes a slide hook which is slidably held at a position opposite to the upper engagement hole 112 of the base unit on the upper part of the module case 102, has an inclined portion at its tip, and engages with the upper engagement hole 112, and 123 denotes a slide hook 122. A pressing portion 124 formed integrally with the finger and pressed down by a finger is a coil spring that abuts on the module case 102 and the slide hook 122 and keeps the slide hook 122 in the engaged position at all times.

In the printed circuit board 103, reference numeral 131 denotes a module connector which is arranged at a position where the base connector 114 of the base unit main body 101 is fitted and which is fixed to the printed circuit board 110 by soldering. According to the system to be configured, a printed circuit board 103 for each function is housed and fixed in each module case 102 by groove engagement, and a terminal block 104 is attached to configure an electronic device module for each function.

Next, the operation when the module case 102 is connected to the conventional base unit main body 101 will be described. The electronic device module of each function selected according to the system to be configured has a lower end projection 121 of the module case 102 engaged with a lower end engagement hole 111 of the base unit as shown in FIGS. When pivoting toward the base unit 101 with the joint as a fulcrum, the slide hook 1
The tip inclined portion 22 has an engagement hole 112 at the top of the base unit.
When it comes into contact with the upper side and slides downward against the urging force of the spring 124, and is immersed and inserted all the way, it is slid and held at the engagement position by the urging force of the spring 124, and the mounting is completed. The upper part may be fixed with screws.

At this time, the module connector 131 is fitted and connected to the base connector 114 of the base unit 101 from the lower end while rotating, and in the mounted state, the base connector 114 of the base unit main body 101 and the base connector 114 of the module case 102 are mounted. The module connector 131 is fitted and electrically connected to each other, and the electric signal of each electronic device module is transmitted through the motherboard 113. In this way, when the connector is rotated and fitted, the pins to be connected first can be arranged as power supply pins so that mounting / separation can be performed during operation.

On the other hand, when the electronic device module is separated, when the pressing portion 123 on the upper portion of the slide hook 122 is pressed downward by a finger against the urging force of the spring 124, the slide hook 122 slides, and the base unit 101 slides. Is disengaged from the upper engagement hole 112, and the module case 102 is rotated forward and separated.

Wires from external input / output devices and the like are wired to the terminal block 104, and are electrically connected to these external devices to form a system. Such a structure of an electronic device integrated with each function-specific electronic device module is often used for a programmable controller, an NC controller, a robot controller, and the like, and a user freely configures and uses the system. In these systems, the electronic device module is often attached to and detached from the base unit due to periodic inspection / failure / change or expansion of the system.

[0011]

The conventional electronic device integrally formed of the function-specific electronic device modules is configured as described above. Therefore, when the electronic device module is mounted, the lower projection of the module case must be removed. Even if it is pressed by mistake toward the base unit without engaging in the lower engagement hole of the base unit, the upper slide hook is engaged with the upper engagement hole of the base unit. In this state, the connector on the base unit side and the module connector on the printed circuit board side
Although the connector is not completely engaged and is erroneously attached (see FIG. 13), the connector and the module connector may be electrically connected to each other. It is difficult to understand the state of erroneous mounting, and if used as it is, the electrical connection is released due to some external factors during use, and there is a possibility that the connector may be improperly connected. Similarly, when the upper slide hook is engaged first and pivoted about the fulcrum, the protrusion is not engaged with the lower engagement hole, resulting in erroneous mounting.

In addition to the case where a failed module is erroneously replaced during operation, even a module in which the pin arrangement of the connector is considered so that the module can be replaced during operation as described above is erroneously replaced as described above. When pivoting around the upper part of the case, the order of mating of the connector pins is from the upper part which is opposite to the regular one. (Originally, the power pin is connected first with the projection engaged with the lower end engaging hole as the rotation axis.) ), The module to be replaced may malfunction and the entire system may malfunction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. In an electronic device integrally formed by engaging and fixing an electronic device module having a built-in electronic component in a base unit, the electronic device may be mounted by mistake. An object of the present invention is to provide an erroneous mounting prevention structure that reliably prevents erroneous operation, has a small installation space, is inexpensive, has excellent mass productivity, and is easy to incorporate into a case.

[0014]

According to the present invention, there is provided an electronic device module in which a module connector and a printed circuit board on which electronic components are mounted are housed in a module case, and the module connector corresponds to the module connector. A base unit that is electrically connected to the electronic device module via a base connector provided on a motherboard; a slide plate provided in a module case when the electronic device module is mounted on the base unit. However, it slides from the position where the connection between the module connector and the base connector is shielded.

Further, the base unit has a standing wall formed with a lower engaging hole and an upper engaging protrusion, and the module case has a protrusion engaging with the lower engaging hole and an upper engaging protrusion. A hook for locking, and a slide plate formed at a position where the connection between the module connector and the base connector is blocked before mounting to the base unit, and a slide plate slidable on a mounting surface; By engaging the projection with the hole, the standing wall and the slide plate come into contact with each other, and the shielding portion slides from a position where the connection between the module connector and the base connector is shielded, and the module connector and the base are slid. This releases the shield from the connector.

Further, on the module case mounting surface, there is formed a groove into which a slide plate and a spring which is joined to the slide plate and always keeps the slide plate in the shut-off position are immersed, and the slide plate is held at an edge of the groove. A wall is provided, and the erroneous mounting prevention mechanism can be assembled from a mounting surface.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Next, Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which an electronic device module is mounted on a base unit. FIG. 2 is a side sectional view after a slide plate is mounted on a module case mounting surface. FIG. FIG. 4 is a perspective view in which a lever is locked to a slide plate, and FIG. 5 is a perspective view of a groove for storing the slide plate as viewed from a module case mounting surface.

In FIG. 1, reference numeral 1 denotes a base unit main body which has a mechanism for engaging and fixing an electronic equipment module, and is fixed to a control panel or the like by screws, and 2 is formed of a resin for housing and fixing the printed circuit board 3 by groove engagement. A module case 3 engaged with and fixed to the base unit main body 1, a printed circuit board 3 on which electronic components are mounted, and 4 a terminal block electrically connected to the printed circuit board 3 and fixed to the module case by screws.

In the base unit main body 1, reference numeral 11 denotes a lower engaging hole provided in a wall portion (standing wall) of the base unit main body 1, and is formed at a position where the module case 2 engaged with the wall portion is easily rotated. Have been. Reference numeral 12 denotes an upper engagement projection provided on a wall of the base unit main body 1, reference numeral 13 denotes a motherboard to which the arranged base connectors 14 are soldered and fixed to the base unit main body 1 by screws, and reference numeral 14 denotes a module on the printed circuit board 3. The connector is electrically connected to the connector 31. These components constitute a base unit main body, and the motherboard 13 is electrically connected to a board of each electronic device module via a base connector 14.

In the module case 2, a lower projection 21 is formed integrally with the module case 2 and provided at a position to be engaged with the lower engagement hole 11 of the base unit main body 1.
Reference numeral 22 denotes a hook which is also engaged with the upper engaging projection 12 by the elastic force of the resin, and reference numeral 23 denotes the module case 2 together with the hook 22.
A pressing projection, which is formed integrally with the module and is pressed by a finger to release locking when separated, is immersed in a groove 25 of the module case mounting surface, is supported so as to be slidable up and down, and blocks insertion of the base connector 3. 25 is a groove formed on the module case mounting surface for accommodating the slide plate 24, 26 is formed of resin, and has a locking hole 261 and a slit 262 for locking by the elastic force.
A lever 27 which is locked to the slide plate 24 and protrudes from the through hole 251 of the case when the module case 2 is not mounted, and a lever 27 abuts on the slide plate 24 and the module case 2 to attach the slide plate 24 This is a spring that is always held at the cutoff position by the force.

In the slide plate 24, 241 is formed on the slide plate 24,
A notch 242 for locking the shielding portion at an optimal blocking position by locking with the 52 is a notch for passing the groove edge wall 253 at the time of assembling, and a reference numeral 243 is a shielding portion for blocking insertion of the base connector 14.

In the groove 25, 251 is a through hole in which the lever 26 on the inner end face of the groove is slidably accommodated, and 252 is a projection which is engaged with the notch 241 of the slide plate 24 and always keeps the slide plate 24 at the optimal shut-off position. , 253, 254 are slide plates 2 formed facing the groove edge of the module case.
A groove edge wall 255 that holds the spring 4 therebetween is a spring storage groove portion that stores the spring 27. These grooves 25 are. Each is formed integrally with the module case 2.

In the printed circuit board 3, reference numeral 31 is arranged at a position where the base connector 14 and the base connector 14 of the base unit 1 are fitted.
The module connector is fixed to the printed circuit board 10 by soldering. According to the system to be configured, a printed circuit board 3 for each function is housed and fixed in each module case 2 by groove engagement, and a terminal block 4 is attached to configure the electronic device module for each function.

FIG. 6 is a perspective view showing a state where the slide plate 24 is mounted on the module case mounting surface, and FIG. 7 is a perspective view showing the same state after the slide plate is mounted. Referring to the drawing, the elasticity of the slide plate 24 is used to incorporate the slide plate 24 into the module case groove. The shielding part 243 is located in between,
The operation of holding the module connector 31 and the base connector 14 (to prevent electrical connection) and slidably mounting the module connector 31 will be described.

First, the shielding portion 24 of the slide plate 24
The lever 26 is inserted and locked on the opposite side of the module 3, and the lever 26 is inserted from the inside into the through hole 251 of the module case mounting surface. In this state, the shielding portion 243 is lifted and tilted, the spring 27 is immersed in the groove 255, the notch 242 of the slide plate is pressed with a finger to pass through the groove edge wall 253, and the tip shielding portion 243 is pressed with a finger. When sliding upward, the notch 241 of the slide plate 24 is engaged with the protrusion 252 in the groove, and the shielding portion 243 of the slide plate 24 is always held at the blocking position by the spring 27. Is done. Here, the slide plate 24 is held by the groove edge walls 253 and 254 so as not to come off from the groove 25.

Next, a case where the module case 2 is mounted on the base unit main body 1 will be described. The lower end projection 21 of the module case is inserted into the lower engagement hole 11 of the base unit.
, The lever 26 protruding from the module case through hole 251 comes into contact with the standing wall of the base unit main body 1, slides inward against the urging force of the spring 27, and sinks into the case end surface. With the movement of the lever 26, the slide plate shielding portion 243 locked with the lever 26
Slides from the blocking position of the base connector 14.
By the sliding of the slide plate shielding portion 243, the shielding of the module connector 31 is released, and the module connector 31 and the base connector 14 are slid to a position where they can be electrically connected and can be fitted.

Further, the lower end projection 21 and the lower engagement hole 11
When the module case 2 is pivoted about the engaging portion of the base unit 14, the base connector 14 is fitted with the module connector 31 to be electrically connected, and the hook 22 on the upper part of the case is engaged with the base unit main body 1. It is snap-fitted into the locking groove of the projection 12 and engaged and fixed. When removing the case, pressing the pressing protrusion 23 on the upper portion of the hook downward with a finger releases the engagement of the engaging protrusion 12 with the groove, and the electronic device module case can rotate in the detaching direction from the base unit main body 1. Becomes Further rotation, the module connector 31 and the base connector 14 are disengaged from each other, and the lower end protrusion 21
Is pulled out from the lower engagement hole 11, the slide plate shielding portion 243 slides to the connector blocking position by the urging force of the spring 27 and locks with the protrusion 252 in the groove of the module case, so that the module connector 31 is effectively shielded. Is done.

Next, the operation at the time of erroneous mounting will be described with reference to FIGS. FIG. 8 is a side sectional view when the module case is incorrectly mounted from above, and FIG. 9 is an enlarged view of the same. When the hook 22 on the upper part of the module case is inserted into and engaged with the groove of the engaging projection 12 on the upper part of the base unit body and is rotated about the fulcrum, the shielding part 243 of the slide plate 24 is moved to the blocking position above the base connector 14. Has been retained,
The shielding portion 243 of the slide plate 24 comes into contact with the upper corner of the base connector 14, and the insertion of the base connector 14 is prevented, so that the electronic device module cannot be mounted.

The lower projection 21 of the module case 2
Similarly, when the cover unit 243 is pressed toward the bay unit without engaging in the lower engagement hole 11 of the base unit main body 1, the shielding portion 243 of the slide plate 24 comes into contact with the upper corner of the base connector 14 and the module case 2 The lower protrusion 21 contacts the wall of the base unit main body 1 and the base connector 1
4 is blocked, and the electronic device module cannot be mounted.

In this state, the base connector 14
Are not fitted at all and all pins are not electrically connected. In this state, since the module case 2 has a large inclination, erroneous mounting can be easily confirmed. In addition, as a condition for not being fitted, the arrangement of the base connector 3 and the shielding portion 243 of the slide plate
Is installed at an optimum position in the longitudinal direction of the connector, and can be made in consideration of the height of the wall below the base unit main body 1.

According to the present embodiment, since the shielding portion of the slide plate is always held at the connector blocking position to prevent the insertion of the base connector, the lower projection of the module case is engaged with the lower engagement hole. However, if the lever is not slid, the case cannot be mounted, and erroneous mounting can be prevented.

When the lower projection of the module case is engaged with the lower engaging hole of the base unit, the lever comes into contact with the wall of the base unit and moves to the end face of the case, so that the shielding portion of the slide plate is engaged with the connector. Since the module case is slid to a possible position, the module case can be attached and detached without operating the lever, and erroneous mounting can be prevented.

Further, if an attempt is made to mount the module case erroneously without engaging the lower projection of the module case in the lower engagement hole of the base unit, the base connector and the module connector are not connected at all due to the shielding portion of the slide plate. Other than proper mounting, electrical connection is not possible, and malfunction due to erroneous mounting can be reliably prevented.

The erroneous mounting mechanism is mounted via a groove provided on the mounting surface of the module case.
It is space-saving and can be easily assembled from the mounting surface of the module case without using any tools, reducing the number of assembly steps and making it economical. Also, with the pin arrangement on the connector,
By providing the power supply pins at the lower portion (lower terminal side), the connector can be reliably connected from the power supply pin side.

In the present embodiment, the configuration in which the slide plate 24 slides when the lever 26 contacts the wall of the base unit main body 1 has been described. When the device module is mounted, it may be configured to slide by contacting the wall of the base unit main body 1.

[0036]

According to the present invention, the slide plate is always held at the connector blocking position, and the module connector and the base connector can be connected only when the electronic device module is mounted, thereby preventing erroneous mounting. .

Further, the lower projection of the module case is engaged with the lower engagement hole, and the case cannot be mounted unless the slide plate slides by contacting the standing wall. Other than normal mounting such as engagement, electrical connection cannot be made, and erroneous mounting can be prevented.

Further, the erroneous mounting mechanism is space-saving, can be easily assembled from the module case mounting surface without using tools, and the number of assembling steps can be reduced, which is economical.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which an electronic device module is mounted on a base unit according to the present invention.

FIG. 2 is a side sectional view of a module case of the present invention in which an erroneous mounting prevention mechanism is assembled.

FIG. 3 is a side sectional view showing an electronic device module mounted on the base unit of the present invention.

FIG. 4 is a perspective view in which a lever is assembled to the slide plate of the present invention.

FIG. 5 is a perspective view of a slide plate mounting groove provided in the module case of the present invention.

FIG. 6 is a perspective view showing a state in which a slide plate is mounted on the module case of the present invention.

FIG. 7 is a perspective view showing a state in which a slide plate is attached to the module case of the present invention.

FIG. 8 is a side sectional view when an electronic device module is erroneously mounted on the base unit of the present invention.

FIG. 9 is an enlarged side sectional view when an electronic device module is erroneously mounted on the base unit of the present invention.

FIG. 10 is a side sectional view in which an electronic device module is mounted on a conventional base unit.

FIG. 11 is a perspective view showing a state where an electronic device module is mounted on a conventional base unit.

FIG. 12 is a side sectional view showing a state where an electronic device module is mounted on a conventional base unit.

FIG. 13 is a side sectional view showing a state in which an electronic device module is erroneously mounted on a conventional base unit.

[Explanation of symbols]

1 Base unit body, 2 module case, 3
Printed circuit board, 11 lower engaging hole, 12 upper engaging protrusion,
13 motherboard, 14 base connector, 21 lower projection, 22 hook, 23 pressing projection, 24 slide plate, 25 groove, 26 lever, 27 spring, 31 module connector, 243 shielding part, 251 through hole.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Taikichi Nagahashi 2-6-1, Otemachi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Engineering Co., Ltd. (72) Isao Matsui 2-6-, Otemachi, Chiyoda-ku, Tokyo No.2 Mitsubishi Electric Engineering Co., Ltd. F term (reference) 5E348 DF01 EE28 EF56

Claims (3)

[Claims] An electronic device module in which a module connector and a printed circuit board on which electronic components are mounted are housed in a module case, and the electronic device module is electrically connected to a base connector provided on a motherboard corresponding to the module connector. When the electronic device module is attached to the base unit, the electronic device includes:
An erroneous mounting prevention mechanism for an electronic device, wherein a slide plate provided in a module case slides from a position where the connection between the module connector and the base connector is blocked. 2. The base unit has a standing wall having a lower engagement hole formed therein and an upper engagement projection, and the module case has a lower projection and an upper engagement projection engaged with the lower engagement hole. And a slide plate that forms a shielding portion at a position where the connection between the module connector and the base connector is shielded before being attached to the base unit and is slidable with respect to a mounting surface. By engaging the lower projection with the hole,
The standing wall and the slide plate are in contact with each other, and the shielding portion slides from a position where the connection between the module connector and the base connector is shielded to release the shielding between the module connector and the base connector. The erroneous mounting prevention mechanism for an electronic device according to claim 1. 3. A groove in which a spring is immersed is formed on a mounting surface of the module case, and a spring that is joined to the slide plate and always keeps the slide plate in a shut-off position, and holds the slide plate at an edge of the groove. The erroneous mounting prevention mechanism for an electronic device module according to claim 1, further comprising a wall, wherein the erroneous mounting prevention mechanism can be assembled from a mounting surface.