JP2848038B2 - Electronic equipment housing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for electronic equipment used for rack-mounted instruments and, more particularly, to an improvement in a structure in which the size of the housing is reduced and assembly workability is improved.

[0002]

2. Description of the Related Art Electronic equipment includes, for example, control equipment mounted inside a machine tool or a control panel. In such a case for a control device, a small one is desirable in terms of realizing internal mounting. As such a housing, for example, a housing disclosed in Japanese Unexamined Patent Application Publication No. 1-200699, which is proposed by the present applicant, is known.

[0003]

However, there are the following problems to reduce the size of the housing. (i) Attaching the programmer The control device has an input device called a programmer. Depending on whether the control device main body is horizontal or vertical, the mounting of the programmer on the main body is also horizontal or vertical. The programmer is provided with a display unit for displaying contents such as an LCD, and the display direction matches the mounting direction of the programmer with respect to the main body. However, in general-purpose control equipment, it is necessary for the convenience of the user to make the display of the programmer easy to see regardless of how the control equipment is mounted inside the equipment to be controlled.

(Ii) Cover and connector The connector is provided in the control device main body and is used when connecting a programmer. Since the programmer is not always connected, it is covered with a dustproof cover when not in use to protect the contacts. However, if the dust cover is detachable, the dust cover is easily lost. For non-detachable slide-type and door-type dust-proof covers, the escape caused by the slide and the escape required for rotation around the hinges become dead space, reducing the mounting volume and reducing the housing surface. There is a problem that irregularities appear on the surface and the appearance is impaired.

When the programmer is mounted on the main body, connection with the connector is made. This mounting is performed by a latch provided on the programmer. The latch serves as a guide for connection with the connector and as a stopper. However, when a force is applied to the programmer, a force is applied to the connector via the latch, and there has been a problem that the connection reliability of the connector is reduced.

(Iii) Extension Module Installation The extension module is connected to the housing when the standard functions of the basic module of the electronic device housing are insufficient. In this case, it is desirable that the shape of the housing is unified between the two, and that the cables to be connected do not appear on the surface. Further, since the connection with the extension module is made only in a part of the casing, the connection mechanism with the extension module on the casing side is preferably as simple as possible.

A first object of the present invention for solving the above problems.
An object of the present invention is to provide an electronic device which can be easily used by a user by increasing a degree of freedom of a mounting direction of a programmer, preventing loss of parts and facilitating maintenance part replacement work. Second
It is an object of the present invention to provide a device in which the extension module can be mounted with high reliability and the housing for the basic module can be small.

[0008]

According to a first aspect of the present invention to achieve the first object, a printed circuit board, a housing surrounding the printed circuit board, and attached to the housing and connected to the printed circuit board. An electronic device housing having a programmer includes a mounting foot provided at a position corresponding to a substantially square vertex provided on the programmer, and a latch provided on a surface of the mounting face facing the mounting foot adjacent to the mounting foot. In addition, the housing has four recesses having a size corresponding to an interval between the mounting feet provided on four upper sides of both sides, and the programmer is provided with any one of a horizontal direction and a vertical direction with respect to the housing. It is characterized by being mounted in a posture.

As these operations, the programmer sets, confirms, or reads out the operation contents of the CPU and the like mounted on the printed circuit board. Four mounting feet are provided on the square apex, and two directions, horizontal and vertical with respect to the recess of the housing, can be adopted as mounting postures.

A second invention for achieving the second object is as follows.
A main module provided at a position depressed from the surface of the housing, a basic module having a connector cover removably mounted on substantially the same surface as the housing surface and covering the main connector, and a flat cable. Fixed side case with one end attached and mounted on almost the same plane as the expansion side housing surface
A cover, a connector to which the other end of the flat cable is attached and which is connected to the main connector, and which is attached to the basic module casing instead of the connector cover when the connector is connected. An expansion module having a movable cable cover is provided. When connecting the extension module to the basic module, remove the connector cover and move the movable cable cover.
Is attached, and the main connector and the connector are connected.

The extension module has a movable-side cable cover to ensure connection with the main connector of the basic module, and the flat cable has a fixed-side cable cover for the extension module. The connector connection work is easy and reliable.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. First
FIG. 1 is a conceptual view showing the configuration of an embodiment of the present invention, and shows an assembled state of parts. In the drawing, a casing 10 has a ventilation port 11 except for a wall mounting surface and a rib 12 for limiting the size of the ventilation port. The size of the ventilation opening 11 is set so that foreign matter such as a screw does not enter the inside of the housing and does not hinder natural convection. The ribs 12 are provided on the side surfaces, for example, in a lattice shape. The engaging portion 13 is a concave portion or an opening provided on the short side on the lower side of the side surface of the housing 10, and the claw portion 46 provided on the frame 45 is engaged with the engaging portion 13. The engaging portion 14 is a concave portion or an opening provided on a long side on the lower side of the side surface of the housing 10, and a claw portion 27 provided on the terminal block 25 is engaged with the engaging portion 14. The recess 15 is provided on the long side on the upper side of the housing 10 and is used for mounting the programmer 90. The opening 16 is provided substantially at the center of the plane of the housing 10 and is provided for the convenience of replacing the battery 75 and installing a ROM pack (not shown). The connector hole 17 is provided at the flat end of the housing 10 and
And a main connector 51 connected to the checker is located inside. The display cover 18 covers the display lamp unit 53, and has a translucent window at a location facing each light emitter. The connector hole 19 is provided between the opening 16 and the display cover 18, and the sub-connector 55 is located inside. The cover holding bases 29 are provided at four places in the four corners of the housing 10, and cover the terminal base 25.
4. Attach 4.

The printed board 20 has mounted thereon electronic components 21 that generate heat, such as power transistors, and passive components, such as capacitors. The terminal block 25 is mounted on the long side of the printed circuit board 20, and a signal line (not shown) is connected to each terminal, and a convex fixing portion 26 and a casing 10 used for mounting the auxiliary printed circuit board 50 are connected to the terminal block 25. Claw part 2 used for connection of
7 are provided. On both sides of the terminal block 25, cover holding blocks 29 are located.

The cushioning member 30 is attached in contact with the printed circuit board 20 and has a high thermal conductivity and is made of an electrically insulating and flexible material. Such a material is a plastic such as a rubber, a gel, a potting material, and a cushion material. Preferably, silica or the like is added to improve thermal conductivity and the like. The thickness of the printed circuit board 20
In the case of a lead or solder that protrudes from the board, or a board that is mounted on both sides, it is thicker than the mounted parts and ensures insulation. The insulating material 35 is a plate-like material made of highly rigid rubber or the like which is mounted between the cushioning material 30 and the base 40.
Thermal conductivity is assured by using a material similar to that of the cushioning material 30. Since the cushioning member 30 has plasticity, there is a possibility that a short circuit may occur at the terminal of the printed circuit board 20. Therefore, the terminal is mounted just in case.

The base 40 is located on the side of the housing 10 where the wall 50 is attached, and is in contact with the insulating material 35. As the material, a material having high thermal conductivity, such as aluminum or copper, and having a rigidity necessary for mounting to the wall 50 is used. The studs 41 are provided at the four corners of the base 40, and the printed circuit board 20 is provided with screws 28 with the cushioning material 30 and the insulating material 35 interposed therebetween.
Used to fix with. Mounting hole 42 is base 4
0 are provided on one of the long sides.
Install two sets of IN rail mounting units. The mounting hole 43 is provided at the center of the other long side of the base 40, and similarly mounts a set of DIN rail mounting units (not shown). The frame 45 is a quadrangular frame-like structure attached to the base 40, and secures a clearance between the base 40 and the printed circuit board 20. Two claws 46 are provided on the short side of the frame 45, and two
Engages with the engaging portion 13.

The auxiliary printed circuit board 50 has a signal processing circuit and the like mounted thereon, and contains components which are not suitable for mounting on the printed circuit board 20 in terms of noise and cost. For example, the auxiliary printed board 50 is a four-layer board and the printed board 20 is a double-sided board for wiring reasons. The auxiliary printed circuit board 50 includes a main connector 51 having terminals connected to a programmer 90 and a sub-connector 5.
And an indicator light unit 53 such as an LCD for displaying.
Is also installed. Shield plate 56 is auxiliary frame 6.
It is attached to the substrate 0 to provide electromagnetic insulation between the auxiliary printed circuit board 50 and the printed circuit board 20, and has a substantially square shape, and a projection 57 is provided on one side thereof.

The auxiliary frame 60 is the auxiliary printed circuit board 50
And a notch 62 into which the projection 57 fits, and a projection 63 on which the side opposite to the side having the projection 57 is loaded. Auxiliary frame
In order to attach the system 60 to the printed circuit board 20, the latch 61
Is engaged with the fixing portion 26 of the terminal block 25.

The holder 70 is inserted through the opening 16, and is mounted on the auxiliary printed circuit board 50.
2 to house a disk-shaped battery 74. The connector cover 80 covers the opening 17 and the cover 82 covers the opening 16.
And the connector hole 19 is closed, and the terminal block cover 84 is covered.
It is attached to the holding base 29 to cover the terminal base 25, and basically prevents dust from entering the inside of the housing 10.

The programmer 90 is mounted on the housing 10,
This is for writing data and confirming a program on the electronic circuit mounted on the printed circuit board 20 or the auxiliary printed circuit board 50. Latches 91 provided at four corners engage with the concave portions 15 of the casing 10 to engage with the concave portions 15. The attachment is detachable.

Next, the functions of the device configured as described above will be segmented for each function. (1) DIN Rail Mounting Function FIG. 2 is an overall view when the housing 10 is mounted on the DIN rail. The housing 10 is mounted on a DIN rail 100. Here, the DIN rail 100 also functions as a girder of the pillar 100a.

FIGS. 3A and 3B are main part configuration diagrams when the housing 10 is mounted on a DIN rail. FIG. 3A is a bottom view and FIG. 3B is a side view. The DIN rail 100 is a rail normally used when an electronic device is mounted on a structure, and has a U-shaped cross section and a shape having a brim at a tip. The guide latch 110 is mounted in the mounting hole 42 of the base 40.
It is fixed to the base 40 by a hooking projection 111 and a claw 112 having elasticity. The press-contact latch section 120 has a base.
The hook 1 is attached to the mounting hole 43 of the
21 and the claw 122 having elasticity, the base is fixed to the base 40, and the slider 123 is used to fix the DIN rail.
The fixing is performed by pressing against the nozzle 100. The slider 123 has a convex knob 124 near the center, and is provided with a restoring force in the direction of arrow A by a cantilever spring 125, and moves along the groove 126.

If the position of the slider 123 is moved to overcome the spring portion 125, the case 10 can be detached from the DIN rail 100. If the position of the slider 123 is set at an intermediate position, the slider is not in contact with the DIN rail 100, so that the slider 123 can be moved in the direction of the DIN rail 100. If no force is applied to the slider 123,
The slider 123 is moved to the DIN rail 10 by the spring portion 125.
It is fixed by pressing against zero.

When mounting on a normal wall instead of the DIN rail 100, the guide latch 110 and the press-contact latch 120 can be removed from the base 40 and screwed. Since the guide latch 110 and the press-contact latch 120 are mounted behind the base 40, the housing 10 can be mounted between the DIN rail mounting and the wall mounting.
There is no large difference in the size of the device, and a small device is sufficient.

(2) Heat Dissipation Function FIG. 4 is an explanatory view of a heat dissipation mechanism of the housing 10. A heat-generating electronic component 21 such as a power transistor is mounted on the printed circuit board 20. The heat generated by the heat-generating electronic component 21 is radiated by radiation, convection and conduction. The heat radiation Q1 due to the radiation is
Is transmitted (Q10), and then infrared rays are radiated from the surface of the housing 10. In a normal thermal design, the contribution of radiation is small and is ignored. As for the convection, heat radiation Q2 due to natural convection generated at the ventilation port 12 is used.
And heat dissipation Q2 'by forced convection using a fun cooler
There is. The heat dissipation by conduction is to dissipate the heat of the heat-generating electronic component 21 to a wall 100 (here, a DIN rail or a pillar) on which the housing 10 is mounted, and the conduction Q30 to Q35 and Q3
Consisting of Here, the conduction Q30 is conduction from the heat-producing electronic component 21 to the printed circuit board 20, and is performed, for example, via a lead. The conduction Q31 is conduction from the front surface to the back surface of the printed circuit board 20. The conduction Q32 is conduction from the printed circuit board 20 to the cushioning material 30. The conduction Q33 is conduction from the front surface to the back surface of the cushioning material 30. Conduction Q34 is cushioning material 30
From the base to the base 40. Conduction Q35 is base 4
0 is conduction from the front surface to the back surface. Conduction Q3 is base 4
Conduction from 0 to wall 100. Here, there is a feature in that the function of the heat radiator is also used in the wall body 100 which is the structure.

The light is transmitted to the cushioning material 30 via the lead of the printed circuit board 20 or the heat-generating electronic component 21. The buffer material 30 has a high thermal conductivity, and the insulating material 35 is also made of a material having a high thermal conductivity, so that heat is transmitted to the base 40. Since base 40 is in contact with DIN rail 100 as shown in FIG. 2, heat is immediately transferred to DIN rail 100. Since the cushioning material 30 and the insulating material 35 are accommodated between the printed circuit board 20 and the base 40 at an appropriate pressure, a portion having low thermal conductivity such as an air layer is substantially eliminated.

As a result, compared to the case 10, the DIN
Since the large structure of the electronic component 100 is used as a heat radiating material, even if the heat generated by the electronic components on the printed circuit board 20 is large, the rise in the internal temperature can be suppressed low.

FIG. 5 is an explanatory view of cooling by natural convection. Here, the position where the ventilation opening 11 is not blocked, that is, the rib 12
The printed circuit board 20 is attached to the inside of the housing 10 in a positional relationship overlapping with the above. The printed board holding portion 18 ′ determines the mounting position of the printed board 20 provided inside the housing 10, and has a height such that the printed board 20 comes to the position of the rib 12.

In this way, the ventilation port 11 sufficiently functions as a passage against natural convection caused by heat generation of the electronic components mounted on the printed circuit board 20. Thereby, the cooling is sufficiently performed by natural convection. When forced convection is also used, a fan may be appropriately mounted.

(3) Combined Function of Terminal Block FIG. 6 is a perspective view of a substantially half portion of the terminal block 25. The fixing portion 26 is a small projection provided on the surface on the printed circuit board 20 side, and engages with the latch 61 of the auxiliary frame 60. The claw portion 27 is a projection approximately the same size as the fixing portion 26 provided on the surface on the printed circuit board 20 side, and is engaged with the engaging portion 14 of the housing 10. The flexure restricting portion 28 'is the printed circuit board 2.
It is a protrusion larger than the claw portion 27 provided substantially at the center of the surface on the 0 side, and comes into contact with the printed circuit board 20 so that the terminal block 25 substantially functions as a reinforcing material for the printed circuit board 20.
The terminal blocks 25 are mounted on the printed circuit board 20 in pairs. By making the terminal block 25 symmetrical to the left and right, it is possible to change the mounting state of the same shape according to the printed circuit board 20 to cope with the situation, and to promote the sharing of parts.

(4) Holding of Auxiliary Printed Circuit Board FIG. 7 is a perspective view showing the structure of an auxiliary printed circuit board 50 on which an auxiliary frame 60 is mounted. The auxiliary printed circuit board 50 has a cable 52 connected to the main connector 51. The cable 52 includes the printed circuit board 20 and the auxiliary printed circuit board 50.
For example, a signal is supplied from the input signal lines connected to the terminal block 25 to the auxiliary printed circuit board 50 via the printed circuit board 20, the signal is processed, and the output terminal is assigned to the terminal. Input / output signals such as output to the table 25 are communicated. The ROM socket 54 is connected to the ROM pack, and determines the contents of signal processing performed by the auxiliary printed circuit board 50 by exchanging the ROM pack. The sub-connector 55 is used for, for example, obtaining power from the battery 74.

The locking portion 64 has a claw projecting toward the auxiliary printed circuit board 50, and restrains the vertical movement of the auxiliary printed circuit board 50. The battery chamber 65 is a space for mounting the battery 74 housed in the holder 70,
A slope 76 is provided on the side opposite to 2. Slope 76
Prepares the attachment and detachment of the holder 70. ROM room 66 is RO
A plane for housing the M pack is provided. Support leg 67
Is to secure a clearance between the auxiliary printed circuit board 50 and the printed circuit board 20, and a gap is provided between the adjacent supporting legs 67 so as to ensure the flow of air. The girder 68 is provided at a portion where the auxiliary printed circuit board 50 is mounted.
It is responsible for supporting the auxiliary printed circuit board 50 and the shield plate 56. The notches 69 are provided at four locations on the beam 68, and engage with positioning projections provided on the casing 10 (not shown) to align the display lamp 53 and the display cover 18 in the direction of arrow B. Is done.

FIG. 8 is a sectional view showing a state where the housing 10 and the auxiliary frame 60 are combined. There is an air gap δ between the beam portion 68 and the auxiliary printed circuit board 50, and the display lamp portion 53 and the display cover 18 are aligned in the direction of arrow G. The gap δ absorbs manufacturing errors and assembly errors, and increases the non-defective rate in manufacturing.

FIG. 9 is a side view for explaining the battery storage state, and the battery storage section 72 is shown in cross section. The holder 70 is a finger hook portion 70 used when detaching from the battery housing portion 72.
1 and a latch 702 to be used when mounting the battery
And a stopper surface 703 having a fan-shaped side corresponding to the shape of the battery 74, and a contact surface 704 having a partially cutout provided on the bottom surface. The battery housing 72 has an opening 721 that engages with the latch 702 and the battery 7 housed in the holder 70.
4 includes an upper contact 722 in pressure contact with the upper electrode 741, a lower contact 723 in pressure contact with the lower electrode 742 of the battery 74, and a guide surface 724 in contact with the contact surface 704.

In such an apparatus, first, the battery 74 is inserted into the holder 70 and brought into the state shown in FIG. Next, when the holder 70 is sent in the direction of the arrow, the latch 702 engages with the opening 721 to be fixed. Then, the contacts 721 and 722 come into contact with the electrodes 741 and 742 to start supplying power to the auxiliary printed circuit board 50. When detaching, pressing the finger hook 701 releases the engagement between the latch 702 and the opening 721, moves in the direction opposite to the arrow, and replaces the battery 74.

(5) Attaching Function of Programmer FIG. 10 is an explanatory diagram of a state in which the programmer 90 is attached to the housing 10. The housing 10 is already assembled,
Therefore, the printed circuit board 20, the cushioning material 30, the base 40, the auxiliary printed circuit board 50, the auxiliary frame 60 and the like are accommodated in the housing 10. A cover 828 is provided on one side of the cover 82 to facilitate movement in the direction of arrow E. Further, a cover in which the locking portion 825 sandwiches the finger hook portion 828 is provided.
82 are provided on both sides. On the surface of the programmer 90, there are provided a key switch 98 for inputting, and a display unit 99 for displaying key input contents and data inside the housing 10, and for example, a liquid crystal or LED is used.

FIG. 11 is a block diagram of the programmer 90.
12A is a rear view, FIG. 12B is a side view, and FIG. 12 is a configuration perspective view of the housing 10 to which the programmer 90 is mounted. The programmer 90 can select and mount two directions, the horizontal direction H and the vertical direction V, on the housing 10. In the figure, mounting feet 92
Have latches 921 and 922 with high rigidity. The mounting foot 93 has a latch 931 that can be displaced with a small rigidity and a latch 932 that has a large rigidity.
Facing one. Guide surface 9 along latch 932
Reference numeral 33 is used as a guide when the programmer 90 is mounted on the housing 10 in the horizontal direction. The mounting foot 94 has latches 941 and 942 that are rigid and can be displaced. Latch 9
42 faces the latch 932, and a positioning projection 943 provided on a plane parallel to the latch 932
When the O is attached to the housing 10 in the horizontal direction, the O is engaged with the concave portion 15 to perform positioning. The positioning protrusion 944 provided on the surface along the latch 941 engages with the concave portion 15 when mounting the programmer 90 to the housing 10 in the vertical direction to perform positioning. The mounting foot 95 includes a rigid rigid latch 951 facing the latch 941 and a rigid rigid latch 952 facing the latch 922.
Are used as guides when the programmer 90 is attached to the housing 10 in the vertical direction. The connector 96 is provided between the mounting feet 93 and 94, and is connected to the sub-connector 55 through the connector hole 19 when mounted horizontally. Connector 97 has mounting feet 92 and 9
3 and is connected to the sub-connector 55 through the connector hole 19 when mounted vertically. The housing 10 has recesses 151-151 corresponding to the mounting feet 92-95.
154 are provided.

The mounting of the device having the above-described structure will be described below. The programmer 90 has a square shape with one side L1, and has a value substantially equal to the maximum width L2 (width including the terminal block 25) in the width direction of the housing 10, so that the programmer 90 can be mounted in either the horizontal or vertical direction. Ensure that they do not protrude from the housing 10. The width L3 of the housing 10 on the side where the programmer 90 is mounted is substantially equal to the distance between the mounting feet 92 and 93 of the programmer 90, and the distance L3 between the concave parts 151 and 152 or the concave parts 153 and 154 is the fixed side latch 921.
And the distance between the displacement side 931 and the like. The outer distance L5 and the inner distance L6 between the recesses 151 and 154 of the housing 10 correspond to the sizes of the mounting feet 92 to 95 and the distance therebetween. Connectors 96 and 97 and housing 1
0 is connected to the guide surface 93 of the mounting foot by the programmer 90.
3, 953 and the positioning protrusions 943, 944, the displacement is restricted, so that unnecessary force does not act upon attachment and detachment, and the reliability of the contact is secured.

(6) Cover Function FIG. 13 is a view for explaining the relationship between the cover 82 and the housing 10, and shows a front sectional view in a state where both are detached. In the drawing, a cover 82 is attached to an opening 16 of a housing 10 and has a front surface 821 that appears on a plane (upper surface), a contact surface 822 provided at one end of a back surface, and another end. It has a contact surface 823 provided in the portion and a central back surface 824 provided therebetween. The locking portion 825 is located at the center rear surface 8
The cover 82 has a projection provided on the housing 24 and fixes the cover 82 to the housing 10. The protrusion 826 is provided at the end of the contact surface 822 and is used for positioning. Stopper part 82
7 is a step-shaped member provided between the contact surface 823 and the locking portion 825.

The housing 10 has a flat surface 101 around the opening 16.
Having. This flat surface 101 forms a substantially same flat surface as the surface 821 when the cover 82 is mounted. The support surface 102 contacts the contact surface 822, the support surface 103 contacts the contact surface 823, and the side support surface 104
To hold the cover 82. The recessed surface 105 is engaged with the locking portion 825 to prevent the cover 82 from falling off the housing 10. The recess 106 is engaged with the projection 826 to prevent the cover 82 from moving in the direction of the arrow E to perform positioning. The stopper 107 is provided at an end of the support surface 103, and stops when the cover 82 moves in the direction of arrow E by abutting against the stopper 827. This moving distance is larger than the width of the connector hole 19. The sliding surface 108 is provided between the concave surface 105 and the support surface 103, and slides when the bottom surface of the locking portion 825 moves in the direction of arrow E.

Next, the operation of the thus configured apparatus will be described. First, a state in which the cover 82 is closed will be described. The contact surfaces 822 and 823 and the central back surface 824 are in contact with the support surfaces 102 and 103 and the side support surface 104, respectively. Since the connector hole 19 is covered by the central rear surface 824, the programmer 90 cannot be mounted, the battery cannot be replaced, and the ROM pack cannot be mounted. The locking portion 825 and the recessed surface 105 are engaged with each other, and the protrusion 826 is also fitted with the recess 106.

Next, when the cover 82 is moved in the direction of the arrow E, the engaging portion 825 is disengaged from the recessed surface 105 and rides on the sliding surface 108, and the projection 826 is fitted into the concave portion 106. Break the relationship. And the stop part 1
07 comes into contact with the stopper portion 827, and the movement is suppressed. In this state, the connector hole 19 appears and the programmer 9
0 can be attached to the housing 10 and the battery 7
Covers the function of 4 covers and ROM pack cover 8
Two are doing. When the cover 82 is moved in the direction of the arrow F in this state, the locking portion 825 is separated from the sliding surface 108 and the inner unit is exposed from the opening 16.

FIG. 14 is a sectional view of an essential part for explaining the terminal block cover 84. As shown in FIG. An end of the terminal block cover 84 has a fixed protrusion 841 for fixing to the cover holding base 29 and a movable protrusion 842 having a smaller amount of protrusion than the engaging portion 843. The portion that covers the terminal block 25 is the thin plate portion 844, which has low rigidity. The cover holding base 29 has a concave portion 291 with a depth that engages with the fixed projection 841 and a small projection 292 with a slight height that engages with the movable projection 842.

The assembling of the device having the above-described structure will be described below. Position the engaging portion 843 on the cover holding base 29,
The fixed projection 841 is inserted into the recess 291, and then the force is applied to engage the movable projection 842 and the small projection 292 to latch. When removing, the thin plate portion 844 is deformed in the thickness direction. Then, a force exceeding a certain level is applied to the movable protrusion 842.
And the engagement with the small projection 292 is released. Then, the force concentrates on the fixing protrusion 841, and the thin plate portion 844 including the engaging portion 843 is bent and deformed, disengaged from the concave portion 291, and the terminal block cover 84 is detached from the cover holding table 29. .

(7) Connection Function with Extension Module FIG. 15 shows the case 10 (basic module) and extension module.
FIG. 2 is a configuration perspective view showing a state in which a console 200 is connected. The extension module 200 is used to add a function when the function of the auxiliary printed circuit board 50 alone of the housing 10 is insufficient. In principle, the extension module 200 is mounted adjacent to the cable so as to minimize the cable length. ing. The expansion module 200 includes a connector cover 210 used for connection with a downstream module.
A fixed cable cover 220 used for connection between the module and the upstream module is provided at each end of the plane.
The shape of the connector cover 210 is substantially the same as the shape of the connector cover 80 that covers the connector hole 17. The flat cable 222 is a signal line for electrically connecting the basic module or the upstream extension module to the extension module 200. One end of the flat cable 222 is a fixed cable cover 220.
, And a movable cable cover 230 at the other end. The terminal block 250 connects a signal line to the extension module 200, and has a shorter length than the terminal block 25 of the basic module. The terminal block cover 260 covers the terminal block 250.

FIG. 16 shows the case 10 and the expansion module 20.
0 is a configuration diagram in a state where 0 is connected, (A) is a front view, (B)
FIG. 3 is a diagram clarifying the electrical connection relationship between printed circuit boards. A movable cable cover 230 having a latch 231 is mounted in the connector hole 17 in place of the connector cover 80, and the main connector 51 and the connection connector 23 are provided.
2 are connected. The fixed-side cable cover 220 and the movable-side cable cover 230 have left-right symmetrical shapes.
It has a surface that is slightly higher than the plane of the housing 10 and the expansion module 200, so that the connection of the flat cable 222 does not cause excessive unevenness in the module plane. We are careful about. Fixed cable cover 220
Is the extension connector 22 connected to the printed circuit board 240
1 and the movable-side cable cover 230 covers the connection connector 232 connected to the main connector 51. The two connectors 221 and 232 are connected by a flat cable 222. The extension connector 242 is mounted on the printed circuit board 240 and has a connector cover 2.
Covered by 10.

In the device configured as described above, the movable cable cover 230 connected to the housing 10 is provided on the extension module 200 side. Therefore, the extension module 20
No extra parts are mounted on the housing 10 having no zero, and the increase in additional cost is small. Further, since the flat cable 222 is covered by the cable covers 220 and 230, the flat cable 222 does not appear on the surface of the housing and is protected. When connecting another extension module 200a to this extension module 200, the connector cover 210 of the upstream extension module 200 is removed, and the downstream extension module 200 is connected.
When the movable cable cover 230a is mounted, electrical connection between the two can be performed by the extension connector 242 and the connection connector 232.

(8) Assembling Work Returning to FIG. 1, the assembling work of the electronic device casing will be described. First, the printed circuit board 20 on which the electronic components and the terminal block 25 are mounted is separated from the cushioning material 30, the insulating material 35 and the frame.
And is attached to the base 40 with the screw 28 via the arm 45. Next, the auxiliary printed circuit board 50 is mounted on the auxiliary frame 60 via the shield plate 56, and this is attached to the printed circuit board 20.
And connect the cable 52 as necessary. The housing 10 covers the printed circuit board 20 on which the auxiliary printed circuit board 50 is mounted, and is covered with various covers.

When mounting on a DIN rail, the guide latch section 110 and the press-contact latch section 120 are mounted on the base 40. The programmer 90 can be mounted on the housing 10,
The cover 82 is opened and closed to replace the battery 74 and the ROM pack. It is understood that such a stacked structure facilitates the assembling work.

[0049]

As described above, the present invention has the following effects. The mounting direction of the programmer 90 with respect to the housing 10 can be selected, and both an increase in the degree of freedom in installation and an improvement in workability are achieved.
In addition, since the relative positional relationship between the two is fixed by the mounting feet, unnecessary force does not act on the connector, thereby improving reliability.

The cover 82 has the connector hole 19 and the battery 7.
Since the cover of the 4th class is also used, sharing of parts is promoted. In addition, when using a connector that is frequently used, it is sufficient to slide the cover 82 and the workability is good.

When the extension module 200 is connected to the housing 10, since the connection is made by using the movable cable cover 230, the system can be easily expanded. In addition, since one expansion module can be connected to another expansion module, many expansion modules can be connected to one basic module.
Connection is possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention, in which parts are assembled to each other.

FIG. 2 is an overall view when the housing 10 is mounted on a DIN rail.

FIG. 3 is an explanatory view of a main part when the housing 10 is mounted on a DIN rail.

FIG. 4 is an explanatory diagram of a heat radiation mechanism of the housing 10;

FIG. 5 is an explanatory diagram of cooling by natural convection.

6 is a perspective view of a substantially half portion of the terminal block 25. FIG.

FIG. 7 is a configuration perspective view of an auxiliary printed circuit board 50 to which an auxiliary frame 60 is attached.

FIG. 8 is a cross-sectional view of a state where the housing 10 and the auxiliary frame 60 are combined.

FIG. 9 is a side view illustrating a battery storage state.

FIG. 10 is an explanatory diagram of a state in which a programmer 90 is mounted on the housing 10.

FIG. 11 is a configuration diagram of a programmer 90.

FIG. 12 is an external perspective view of a housing 10 on which a programmer 90 is mounted.

FIG. 13 is a diagram illustrating a relationship between a cover and a housing.

FIG. 14 is a cross-sectional view of a main part explaining a terminal block cover 84;

FIG. 15 is a configuration perspective view showing a state in which the housing 10 and the extension module 200 are connected.

16 is a main part configuration diagram showing a connection state between the housing 10 and the expansion module 200. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Housing 20 ... Printed circuit board 25 ... Terminal block 30 ... Buffer material 40 ... Base 45 ... Frame 50 ... Auxiliary printed circuit board 60 ... Auxiliary frame 70 ... Holder 72 ... Battery accommodating part 74 ... Battery 80 ... Connector cover 82 ... Cover 84 ... Terminal block cover 90 ... Programmer 100 ... DIN rail 110 ... Guide latch section 120 ... Press-contact latch section 200 ... Expansion module 210 ... Connector cover 220 ... Fixed side cable cover ― 230… Movable cable cover

────────────────────────────────────────────────── ─── Continued on front page (51) Int.Cl. ⁶ Identification code FI H05K 7/12 H05K 7/12 S 7/14 7/14 A 7/20 7/20 B (31) Priority claim number Application Hei 2-107886 (32) Priority date Hei 2 (1990) October 15 (33) Priority claiming country Japan (JP) (31) Priority claim number Real application Hei 2-111348 (32) Priority date Hei 2 ( (1990) October 24 (33) Priority claim country Japan (JP) (31) Priority claim number Jpn. 2-111812 (32) Priority date Hei 2 (1990) October 25 (33) Priority claim Country Japan (JP) (31) Priority claim number Jpn. Hei 2-112246 (32) Priority date Hei 2 (1990) October 26 (33) Priority claim country Japan (JP) (72) Inventor Fumio Watanabe (72) Inventor Takayuki Hamada 2-9-1, Nakamachi, Musashino-shi, Tokyo Yokogawa Electric Corporation (56) References JP-A-2-310999 (JP, A) JP-A-2-83956 (JP, A) JP-A-63-33686 (JP, U) JP-A-2-91394 (JP, U) ( 58) Fields surveyed (Int.Cl. ⁶ , DB name) H05K 7/18

Claims (6)

(57) [Claims] An electronic device housing having a printed board (50), a casing (10) surrounding the printed board, and a programmer (90) attached to the casing and connected to the printed board. The first four mounting feet (92 to 92) provided at positions corresponding to substantially square vertices provided on the programmer.
95), and a latch provided on a surface of the housing facing the mounting foot adjacent to the mounting foot, and a concave portion having an interval corresponding to the interval between the four mounting feet provided on the upper side of both sides of the housing. (15) The electronic device, wherein the programmer is mounted on the casing in one of a horizontal direction and a vertical direction by engaging the mounting foot with the concave portion. Equipment housing. 2. A connector (96, 97) provided on a surface of a mounting foot of the programmer, wherein one of the connectors is provided with a connector hole when the programmer is mounted horizontally or vertically with respect to a housing. (1
9) through the connector (55) of the printed circuit board (50)
The housing for an electronic device according to claim 1 , wherein the housing is connected to the electronic device. 3. The first to fourth mounting feet have a substantially quadrangular cross section, and an inner side face adjacent to the four side faces faces an inner side face of the adjacent mounting foot. The first mounting foot (92) has two high rigidity latches (921, 922) on adjacent inner side surfaces, and the second mounting foot (93) has a low rigidity and displaceable latch (931); A rigid latch (932) is provided on the adjacent inner side surface, and the latch (932) is provided.
1) faces one of the latches (921) of the first mounting foot, and the third mounting foot (94) has two rigid and displaceable latches (941, 942) on adjacent inner side surfaces. At the same time, one latch (942) faces the latter latch (932) of the second mounting foot, and the fourth mounting foot (95) is connected to a latch (952) having a small rigidity and being able to be displaced, and a large rigidity. With the latch (951) on the adjacent inner side, the former latch faces the other latch (922) of the first mounting foot, and the latter latch is one latch (941) of the third mounting foot. The housing for an electronic device according to claim 1, wherein: 4. The second mounting foot (93) has a guide surface (933) along a rigid latch (932), and one latch (942) of the third mounting foot (94).
First positioning projection (943) provided on a plane parallel to
And a second positioning projection (944) provided on a plane parallel to the other latch (941), and the fourth mounting foot (95) is provided with a rigid latch (9).
51), the guide surface of the second mounting foot acts as a guide when the programmer is mounted in a horizontal direction with respect to the housing. The projection engages with the recess, and when the programmer is mounted vertically to the housing, the guide surface of the fourth mounting foot acts as a guide, and the second positioning projection is formed of the recess. The electronic device housing according to claim 3 , wherein the electronic device housing is engaged with the electronic device. 5. A main connector (51) provided at a position depressed from the surface of the housing, and a connector cover (80) removably mounted on substantially the same surface as the surface of the housing to cover the main connector. And a fixed-side cable cover (22) to which one end of a flat cable is mounted and which is mounted on substantially the same plane as the surface of the expansion-side housing.
0), a connector (232) to which the other end of the flat cable is attached and which is connected to the main connector, when the connector is connected to the basic module housing instead of the connector cover Movable side key to be attached
Extension module (20) with bulk cover (230)
0), and when connecting the extension module to the basic module, remove the connector cover, attach the movable cable cover, and connect the main connector and the connection connector. An electronic device housing characterized by the above-mentioned. 6. An extension module connected to a basic module.
A downstream extension module connected to the module, the extension module having an extension connector (242) covered by a connector cover (210), and the downstream extension module being a flat cable; Fixed-side cable cover (220), one end of which is mounted and mounted on substantially the same plane as the housing surface of the upstream expansion module;
A connector (232) to which the other end of the flat cable is attached and which is connected to the extension connector. When the connection connector is connected, the connector is mounted on the extension module casing instead of the connector cover. A movable cable cover (230), when connecting the downstream extension module to the extension module, remove the connector cover, attach the movable cable cover, and attach the extension connector The electronic device housing according to claim 5, wherein the connector is connected to a connector.