JPH052821Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is applied to the front surface of instruments, such as electronic equipment used in the measurement field, which is removably installed in the front opening of the case body of the instrument. It concerns the panel structure.

[Prior Art] Many types of instruments used in the field of measurement have been proposed or implemented in the past. For example, as shown in FIG. 9, there is a display panel 10 on the front.
A chassis 104 having a circuit board 103 attached thereto is inserted and removed freely into a case body 105 with an open front.
02 to perform necessary operations using operation keys (not shown) and display information;
If necessary, the chassis 104 is pulled out from the case body 105 by a predetermined dimension and adjusted using an adjustment section 106 consisting of an operation switch formed on the front side of the chassis 104, and maintenance of each part of the circuit board 103 is performed.・When performing inspections,
An instrument 101 is used in which a chassis 104 is completely pulled out from a case body 105 to perform maintenance and inspection work.

By the way, the instrument 101 configured as described above
Some front panels 102 have a structure in which a door is provided on the front surface (or a part of the front surface). FIG. 10 shows an example of the structure of the door. In the figure, the door 107 is rotatably supported with a shaft 107a protruding from the ends of the upper and lower surfaces of the door 107 being forcibly fitted into a recessed fitting hole 102a formed in the front panel 102. It is something that

However, in the door structure described above, the door 107
Since the shaft 107a of the door 107 is forcibly fitted into the recessed fitting hole 102a, if the door 107 is opened and closed repeatedly for a long time, the recessed fitting hole 102a will expand due to the shaft 107a of the door 107, causing the door 107 to become loose. At worst, the door 107 may become detached from the front panel 102, resulting in a lack of durability.

Therefore, the present invention was developed to solve the above-mentioned problems, and its purpose is to provide a front panel structure for instruments that has a simple structure and is extremely durable. .

[Means for Solving the Problems] Therefore, in order to achieve the above object, the front panel structure of instruments according to the present invention has a storage window 20, and upper and lower (or Mounting groove 39 at the specified position on the left and right)
an inner frame member 16 having a groove a formed thereon; an opening 29 fixed to the front surface of the inner frame member 16 at a position facing the storage window 20; and an opening 29 at a position facing the mounting groove 39a. The outer frame member 17 has a mounting groove 40a formed in a direction facing the groove 39a, and a shaft 35 provided in the opening 29 and protruding from a predetermined position on the upper and lower (or left and right) surfaces thereof. It is characterized by having a door 30 rotatably clamped and fixed in each of the mounting grooves 39a and 40a.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a perspective view showing an embodiment of the meter according to the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a partially cutaway front view of the meter according to the present invention, and FIG. FIG. 1 is a cross-sectional view of FIG. 1, cut to reveal the main structural parts. In the figure, 1 indicates a meter. This instrument 1 includes a case body 2 having a substantially box-like shape and having an opening 2a on the front surface;
It is generally constructed by a chassis frame 3 housed in a manner that can be freely inserted into and removed from the case body 2 through the opening 2a, and a front panel 4 that is detachably attached to the opening 2a of the case body 2.

Next, each of the above components will be explained in detail with reference to the drawings. The chassis frame 3 is formed by bending a strong thick metal plate with open front and lower surfaces. A pair of projections 5, each long in the axial direction, are provided at opposing positions on both inner side surfaces 3a, 3a of the chassis frame 3, forming guide grooves 5a. This guide groove 5a
are formed at a plurality of locations (three locations in the embodiment) in the thickness direction of both inner side surfaces 3a, 3a of the chassis frame 3. The inside of the chassis frame 3 in which the guide groove 5a is formed constitutes a storage section 6.
A plurality of circuit boards 7 can be freely inserted and removed along the guide groove 5a. The circuit board 7 is a display device driving circuit board for driving a display device 8, which will be described later, an input circuit board for taking in information from an operation section 31 of the front panel 4, which will be described later, as an input signal, and the input circuit board. It consists of a control circuit board and the like for controlling calculations and the like based on input signals from the controller.

Next, on the left side of the upper surface of the chassis frame 3, a display device 8 is mounted which is housed and fixed within an outer casing 8b with a display surface 8a exposed. This display device 8 is for displaying input information such as initial settings when measuring an object to be measured, and output information such as measurement results of an object to be measured. For example, data display,
Various displays such as bar display, setting display, trend display, etc. are performed. Note that this display device 8 has flat plate-shaped and L-shaped mounting plates 9, 9 provided on the left and right sides.
It is fixedly supported on the chassis frame 3 by a and 9b.

Furthermore, a guide member 10 in which a guide groove 10a is formed is provided on the L-shaped mounting plate 9b. This guide member 10 is connected to the case body 2
A mounting auxiliary plate 11 is similarly provided on the inner surface of the upper wall 2b, so that a control circuit board 23 of an external storage device 21, which will be described later, can be freely inserted and removed.

Incidentally, a motherboard 12 that mediates measurement control is fixedly installed on the back of the chassis mount 3 and the display device 8. A plurality of connectors 13, 13 (corresponding to the number of circuit boards) are provided at predetermined positions on the front and back surfaces 12a, 12b of this motherboard 12.
a, 13b are provided. A connector 13a is provided on the surface 12a of this motherboard 12.
The circuit board 7 housed in the housing section 6 can be detachably attached thereto. Further, an accessory unit 14 is detachably attached to the back surface 12b of the motherboard 12 via a connector 13b. The attached unit 14 is a power supply unit 14a for driving display devices, external storage devices, internal circuits, etc., input/output communication between external devices via a personal computer, etc., and alarms etc. that occur within the instrument. It is composed of an external input/output unit 14b consisting of multiple types for outputting this to the outside, an input terminal unit 14c formed with a plurality of terminals for receiving input from the object to be measured, etc. It is something. In the embodiment, a power supply unit 14a, two types of external input/output units 14b, and an input terminal unit 14c are detachably attached to the motherboard 12 via the connector 13b in this order from the top.

Therefore, the circuit board 7 and the attached unit 14 are connected to the connector 1 from the front and back of the motherboard 12.
3, the internal circuit and external circuit are separated by the motherboard 12, and even if a malfunction occurs in the meter 1, it can be dealt with immediately and maintenance and inspection can be easily performed. It is becoming possible to do this.

By the way, both sides 3a of the chassis frame 3,
An axially long L-shaped chassis rail 15 is provided at the bottom of 3a. This allows the chassis frame 3 to be smoothly moved in and out of the case body 2.

Next, the front panel 4 has a flange portion 16a.
It is formed by a double structure of an inner frame member 16 and an outer frame member 17. The flange portion 16a
is fixed by a mounting bracket 45, which will be described later, with its back portion in contact with the wall panel 18 during assembly and installation. The inner frame member 16 includes:
An opening hole 19 is formed at a position corresponding to the display surface 8a of the display device 8, and the opening end thereof faces inward and forms an inclined surface 19a at a predetermined angle. Furthermore, a storage window 20 is formed on the right side in parallel with this opening hole 19. In this storage window 20, an external storage device 21 is stored and fixed. This external storage device 21 has a storage medium insertion section 22a,
a control unit 22 that controls recording and reproduction between the display device 8 and a storage medium (for example, a disk) not shown; and a control unit 22 provided on the back of the control unit 22;
A control circuit board 23 to which elements for controlling and driving the external storage device 21 are connected, and the control unit 22
The control unit 24 is provided at the bottom of the external storage device 21 and includes a plurality of operation keys for selecting functions of the external storage device 21, a switch 24a, and the like.

In addition, in the embodiment, as the external storage device 21
FDD (Floppy Disk Driver) is used.

By the way, as shown in FIG. 6, the outer frame member 17 has a protrusion piece 25 provided on the peripheral edge of the back surface that is fitted into a recess 26 formed in the inner frame member 16, and the outer frame member 17 is connected to the inner frame member 16. Inner frame member 1 is tightened by screwing the inner surface between
It is fixed to the front of 6. This outer frame member 17 has an opening hole 27 having a slightly larger diameter than the opening hole 19 formed in the inner frame member 16 at a position facing the opening hole 19 of the inner frame member 16 . Further, a display filter plate 28 is provided between the opening holes 19 and 27. The display filter plate 28 is sandwiched between the opening holes 19 and 27 on all four sides, making the display device 8 easy to view and preventing dust from entering from outside.

On the other hand, the outer frame member 17 has the inner frame member 1
An opening 29 whose right side is open at a position facing the storage window 20 of No. 6 and whose diameter is slightly larger than that of the storage window 20.
is formed. Note that this opening 29 has
A door 30, which will be described in detail later, is attached.

Further, at the lower part of the front panel 4, an operation section 31 is provided which includes a plurality of operation keys 31a, a switch 31b, and the like. The operation keys 31a in the operation section 31 are used to perform input settings during measurement, change settings, and switch the display screen of the display device 8, and the switch 31b is used to turn the display device 8 on and off. This is for switching the drive.

Furthermore, both sides 4a, 4a of the front panel 4
At the bottom of the cutout 3, a through hole 32a is formed.
2 is formed. A fixing screw 33 passes through the notch 32 through a through hole 32a, and is screwed into a screw hole 34 formed in the front upper part of both side surfaces 3a, 3a of the chassis frame 3. Thereby, the front panel 4 is fixedly supported on the chassis frame 3 with the flange portion 16a protruding from the case body 2.

In this embodiment, when the fixing screw 33 is removed and the front panel 4 is pulled out from the opening 2a of the case body 2, the external storage device 21 is also pulled out.

Next, the structure of the door 30 will be described in detail with reference to FIGS. 5 and 6. In addition, in FIG. 5, only the outer frame member 17 is shown in a back view.

The door 30 has a rectangular shape, and a shaft 35 is provided integrally with the door 30 on the right side of the upper and lower surfaces 30a and 30b of the door 30 in FIG.
Further, a recessed fitting groove 36 is formed in the substantially central portion of the left front surface of the door 30 . Furthermore, a triangular projection 37 having a groove continuous with the recessed fitting groove 36 is integrally formed on the right side in parallel with the recessed fitting groove 36, and constitutes a handle 38.

Incidentally, on the right side of the storage window 20 of the inner frame member 16, at a predetermined upper and lower position in contact with the edge of the storage window 20, there is a protrusion with a semicircular mounting groove 39a having a slightly larger diameter than the shaft 35. A portion 39 is integrally formed. Further, at a position facing the protrusion 39 in the outer frame member 17, a recess 40 is provided with a semicircular mounting groove 40a facing the protrusion 39.
is formed. And when assembling the door 30
The shaft 35 that projects above and below the door 30 is connected to the convex portion 39 centered on the line A-A (dotted chain line) shown in FIG.
It is fixedly supported by being sandwiched between the mounting groove 39a (inner frame member 16) and the mounting groove (outer frame member 17) of the recess 40. Also, this door 30 is A-A
It can be rotated forward by a predetermined angle around the line.

Note that the above-mentioned mounting grooves 39a and 40a may be provided on the left and right sides of the inner frame member 16 and outer frame member 17, respectively, to fixedly support the shaft 35 of the door 30.

Next, the case body 2 is formed of a substantially box-shaped metal plate with open front and rear surfaces. A recessed fitting portion 41 is formed in the lower portions of both outer wall surfaces 2c and 2c of the case body 2. The recessed fitting portion 41 is an axially long aperture surface 41a having a stepped portion toward the inside of the case body 2. Loose insertion holes 42, 42 are formed at two locations approximately in the center of this recessed fitting portion 41, respectively. Further, screw holes 43, 43 are provided on both side surfaces 3a, 3a of the chassis frame 3, which face the loose insertion holes 42, 42. Locking members 44, 44 are screwed and fixed into the screw holes 43, 43 through the loose insertion holes 42, 42. This locking member 44 is composed of a locking plate 44a which is a head portion and to which a mounting bracket 45 described later is attached, and a screw portion 44b provided on the locking plate 44a. When the locking member 44 is attached to the chassis frame 3, it is fixed so that the surface of the locking plate 44a is substantially flush with the side wall surface 2c of the case body 2.

Next, the structure of the mounting bracket 45 attached to the locking member 44 will be described in detail with reference to FIGS. 7 and 8.

This mounting bracket 45 is formed by bending a thick metal plate, and includes a fixed member 46, a movable member 47,
It is constituted by moving means 48. The fixing member 46 is formed of a rectangular frame whose front and left sides are open in FIG. 7, and whose right side has a screw hole 49. On the left side of the bottom surface (case body side) of this fixing member 46,
A protrusion 50 is formed, and a mounting hole 51 having a notch 51a of a predetermined length is provided on the upper and lower surfaces. The protrusion 50 has a locking groove 52 having a slightly smaller diameter than the locking plate 44a of the locking member 44.
is formed. Further, the length between the end of the protrusion 50 and the left end of the fixing member 46 is l ₁ ,
The length between the mounting hole 51 and the right end is _l2 . Furthermore, a mounting hole 54 in which a locking groove 52 similar to the locking groove 51 formed in the protruding portion 50 is formed is also provided on the right side of the bottom surface of the fixing member 46 . The length between the centers of each of the locking grooves 51 and 52 described above is set to be approximately the same as the length between the centers of the locking plate 44a of the locking member 44.

Next, a movable member 47 to which the fixed member 46 is attached is longer than the fixed member 46 and
It has a vertical dimension larger than the vertical dimension of 6. Also,
Like the fixed member 46, the moving member 47 has an open front and left side, and a screw hole 55 on the right side.
It is formed by a rectangular frame body provided with. A first through hole 5 having a length l ₃ is provided on the bottom surface of the moving member 47 at a predetermined distance from the right end.
6 is formed. In addition, this first through hole 5
6, a second through hole 58 having a length _l5 is formed through a support piece 57 having a length _l4 .

Here, the length l ₃ of the first through hole 56 is greater than the length l ₆ between the fixing member 46 and the attachment hole 51. The maximum movement stroke of this mounting bracket 45 is _l3 - _l6 . Further, this mounting bracket 45 is designed so that the relationships l ₁ < ₅ and l ₂ > l ₄ hold.

The mounting bracket 45 configured as described above is assembled in advance before the instrument 1 is attached, and the assembly is performed by first passing the protrusion 50 of the fixed member 46 through the second through hole 58 of the movable member 47. and hook it on the support piece 57. This is easily accomplished by screwing the screws of the moving means 48 into the respective screw holes 49 provided in the fixed member 46 and the moving member 47.

Furthermore, when attaching the instrument 1 to the wall panel 18 using the mounting bracket 45 assembled in advance as described above, first, as shown in FIGS. 8a and 8b,
The front and rear locking grooves 52 and 53 of the fixing member 46 are hooked onto each locking plate 44a of the locking member 44. next,
While maintaining this state, the fixed member 46 and the movable member 4
7 is tightened until the front end 47a of the moving member 47 presses the wall panel 18 and the back surface of the front panel 4 comes into contact with the wall panel 18. Therefore, the meter 1 is securely fixed to the wall panel 18 by the mounting bracket 45. Furthermore, the locking member 44 to which the mounting bracket 45 is attached is not directly fixed to the case body 2, but is attached to the chassis frame 3 on which the display device 8 is mounted through the loose insertion hole 42 of the case body 2. Fixed. Therefore, the weight of the display device 8 etc. is directly transferred to the mounting bracket 45 through the case body 2.
Since the load on the case body 2 can be reduced without being added to the weight, there is no risk that the case body 2 will be distorted by the weight.

In the embodiment described above, the locking member 44 is loosely inserted into the loose insertion hole 42 of the case body 2 and fixed to both side surfaces 3a, 3a of the chassis frame 3.
4 is configured to fix the instrument 1 to the wall panel 18 by attaching the mounting bracket 45 to the wall panel 18. For example, the chassis mount 3 is formed into a box shape and the locking members 44 are fixed to the upper and lower surfaces thereof. It may be fixed to the wall panel 18 by attaching a mounting bracket 45.

Furthermore, even if an object heavier than the display device 8 is placed on the chassis frame 3 and stored in the case body 2, this can be handled by providing the above-mentioned mounting brackets 45 at multiple locations. I can do it.

Furthermore, in the embodiment described above, the shaft 35 of the door 30
Mounting grooves 39a and 40a formed in the inner frame member 16 and the outer frame member 17 for clamping and fixing the
Although the shape is semicircular, the shape is not particularly limited to the semicircular shape as long as it forms a hole with a larger diameter than the diameter of the shaft 35 of the door 30.

[Effect of the invention] As explained above, according to the front panel structure of instruments of the invention, the shaft 35 of the door 30 is connected to the inner frame member 16.
and each mounting groove 3 formed in the outer frame member 17.
The door 30 can be attached to the front panel 4 with a simple structure in which it is clamped and fixed by 9a and 40. In addition, the door 30 does not rattle or come off from the front panel 4 even when opened and closed for a long time, resulting in extremely durable effects, and the door 30 can always be opened and closed in a stable manner. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the meter according to the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a partially cutaway front view of the meter, and FIG. 4 is the same as that shown in FIG. 5 and 6 are exploded views showing the structure of the door; FIG. 7 is an exploded perspective view of the mounting bracket;
8a and 8b are diagrams showing the operation of the mounting bracket in the attached state; FIG. 9 is a partially cutaway side view of a conventional meter;
FIG. 10 is a diagram showing an example of the structure of a door in a conventional meter. 1... Instrument, 2... Case body, 2a... Opening, 3... Chassis mount, 4... Front panel, 1
6... Inner frame member, 17... Outer frame member, 20... Storage window, 29... Opening, 30... Door, 35...
Shaft, 39a, 40a...Mounting groove.

Claims (1)

[Claims for Utility Model Registration] It has a storage window 20, and mounting grooves 39 are provided at predetermined positions above and below (or on the left and right) touching the edge of the storage window 20.
an inner frame member 16 having a shape formed therein; fixed to the front surface of the inner frame member 16, having an opening 29 at a position facing the storage window 20, and having an opening 29 at a position facing the mounting groove 39a; an outer frame member 17 in which a mounting groove 40a is formed in a direction facing the groove 39a; A front panel structure for instruments, comprising a door 30 rotatably clamped and fixed in each mounting groove 39a, 40a.