JPH08330774A - Input unit structure of recorder - Google Patents

Abstract

PURPOSE: To provide input unit structure of a recorder, wherein the input unit is thinned down and improved in assembling workability and electromagnetic shielding effect. CONSTITUTION: An input unit structure is equipped with a chassis 11 which bears up a mounting circuit board 18, a front panel 21 fixed to the chassis 11 covering its front side, and a cover 31 provided covering the chassis 11, wherein a pair of protrudent pieces 15 are provided to lateral spots located on the rear end of the chassis 11, and a recessed support piece is provided to a part of the cover 31 which does not confront the protrudent pieces 15 of the support 34. The protrudent pieces 15 which are bilaterally located are borne up by the support 34 of the cover 31 between the rear end of the chassis 11 and a certain spot, and the recessed support piece of the cover 31 is placed on a center side to form a fixed section 43. By this setup, an electromagnetic shielding sheet material 19 can be kept wider in covering area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input unit structure of a recorder, and more specifically, it can make the thickness relatively thin and improve workability during assembly and electromagnetic shield effect. The present invention relates to a structure of an input unit of a recorder.

[0002]

2. Description of the Related Art In various recorders such as a waveform recorder, some recorders are provided with an input unit which is detachably attached so that an analog signal can be input.

FIG. 6 shows the conventional input unit 5 described above.
1 is an explanatory view showing an example of a cross-sectional structure of No. 1, a chassis 52 for supporting the mounting circuit board 57 having an electromagnetic shield effect, and a front panel attached to the front side of the chassis 52. It is composed of a portion 58 and a cover portion 63 that also has an electromagnetic shield effect and is detachably provided on the chassis portion 52.

Of these, the chassis portion 52 is a pillar member 56 on which a horizontally mounted mounting circuit board 57 is erected.
It is formed by including a bottom plate portion 53 that supports the bottom plate portion through the front plate portion 53, a front plate portion 54 in which a front end portion of the bottom plate portion 53 is folded up, and an eave portion 55 in which a front end portion of the front plate portion 54 is folded back. .

The front panel portion 58 includes a vertical panel portion 59 having a terminal portion 61, a knob portion, and the like, and a pair of horizontal panel portions projecting inward from upper and lower end edge portions 59a and 59b of the vertical panel portion 59. It is formed so as to have a substantially U-shaped cross section with the projecting piece portions 60, 60, and has a space 6 between the projecting piece portions 60 and 60 and the eaves portion 55.
2 is formed and is attached to the chassis portion 52 while covering the front side thereof.

Further, the cover portion 63 has the space 6
2 is a top plate portion 64 in which the tip portion 64a can be freely introduced.
And a back plate portion 65 in which the rear end portion of the top plate portion 64 is folded down,
The edge portion of the back plate portion 65 is formed of a supporting leg portion 66 which is freely folded back so as to come into contact with the bottom plate portion 53.

In this case, the cover portion 63 is pushed into the chassis portion 52 from the rear side thereof and the gap portion 6 is formed.
2 and the rear end portion 53a of the bottom plate portion 53.
0 and 72 are formed and are detachably covered.

Moreover, the fastening portion 70 formed on the side of the gap 62 has the top plate portion 64 introduced into the gap 62.
The upper end edge 59 of the panel 58 with respect to the tip 64a of
By inserting the screw material 71 from the side of the horizontal projecting portion 60 located at a and screwing the screw material 71 on the side of the eaves portion 55 of the chassis portion 52, and between the rear end portion 53 a of the bottom plate portion 53. The fastening portion 72 formed on the bottom of the bottom plate portion 53 side, the screw material 7
3 is inserted and screwed to the side of the support leg portion 66 of the cover portion 63, respectively.

[0009]

By the way, according to the above-mentioned conventional technique, the cover portion 63 can be provided so as to be freely attached to and detached from the chassis portion 52.

However, in the case of the above-mentioned prior art, since the fastening portions 70 and 72 are both formed by screwing the screw members 71 and 73, it is necessary to provide them particularly on the bottom plate portion 53 side. There is a disadvantage that the length of the pillar member 56 must be erected to secure a space for screwing, and as a result, the thickness of the input unit 51 increases by that much.

Further, since the fastening portions 70 and 72 have the structure in which the screw members 71 and 73 are screwed, the work for fastening the screw members 71 and 73 is increased accordingly.
There was also a problem that deteriorated workability during assembly.

Further, in the fastening portion 72 formed on the side of the bottom plate portion 53, the supporting leg portion 66 of the cover portion 63 and the screw material 73 are provided.
Since and exist as protrusions, the electromagnetic shield sheet material 74 cannot be laid in this portion,
There was also a problem that the generation of noise could not be effectively blocked.

In view of the above problems of the prior art, the present invention provides a recorder input unit structure which can reduce the thickness of the input unit and at the same time improve workability during assembly and electromagnetic shield effect. The purpose is to provide.

[0014]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and its structural feature is that a bottom plate portion that supports a mounted circuit board and a front end portion of the bottom plate portion are folded up. A front plate part, a chassis part composed of an eave part obtained by folding back a front edge part of the front plate part, and a pair of horizontal projection parts projecting inward from both upper and lower edge parts of the vertical panel part. And has a substantially U-shaped cross section, and has a front panel part attached to the chassis part while forming a space between the eave part and the front side to cover the front side, and a tip part to the space part. A top plate part that can be freely introduced, and a back plate part in which the rear end part of the top plate part is folded down,
A cover portion formed of a support leg portion in which a tip edge portion of the back plate portion is freely folded back so as to be brought into contact with the bottom plate portion, and the cover portion is pushed into the chassis portion from the rear thereof to form the void portion. And a rear end portion of the bottom plate portion, each of which has a fastening portion formed between the bottom portion and the bottom end portion of the recorder unit. Except for each of the left and right parts, a pair of raised pieces formed by a cut-and-raised standing portion and a horizontal portion obtained by bending the tip of the standing portion in the horizontal direction are provided. In the portion, the non-face-to-face portion with the raised piece,
The concave support leg pieces that are bent and deformed in the horizontal direction through the notches are provided, and the fastening portion formed on the side of the void is provided at the tip of the cover introduced into the void. On the other hand, it is formed by inserting from the side of the horizontal projecting piece located at the upper edge of the vertical panel section and screwing a screw material on the side of the eaves section of the chassis section, and between the rear end section of the bottom plate section. The fastening portion formed on the lower side supports the raised piece portions located on the left and right sides of the bottom plate portion under the support leg portion side of the cover portion, and the recessed portion of the cover portion on the side of the central portion of the bottom plate portion. The supporting leg pieces are placed and fitted to each other. In addition,
In this case, it is desirable that an electromagnetic shield sheet material is laid down on the bottom plate portion of the chassis portion so as to reach the pair of raised piece portions.

[0015]

Therefore, by pressing the cover part horizontally from the rear of the chassis part, the fastening parts are respectively formed between the void part and the rear end part of the bottom plate part. It can be detachably covered.

In this case, the fastening portion on the side of the void is inserted from the side of the horizontal projecting piece located at the upper edge of the vertical panel with respect to the tip of the cover introduced into the void. Then, a screw member may be screwed on the side of the eaves portion of the chassis portion.

Further, the fastening portion formed between the rear end portion of the bottom plate portion and the raised piece portions located on the left and right of the bottom plate portion are supported below the supporting leg portion of the cover portion. And,
It can be formed by placing the recessed support leg pieces of the cover on the side of the central portion of the bottom plate and fitting them together.

Therefore, from the side of the fastening portion formed between the bottom plate portion and the rear end portion, the screw material can be swept away to make the screwing space unnecessary, so that the entire thickness can be obtained. Not only can this be made thinner, but the work for fastening the screw material can be reduced and the workability during assembly can be improved.

Moreover, since the pair of raised pieces located on the left and right of the bottom plate are in contact with the inner surface of the back plate of the cover, the electromagnetic shield sheet material is mounted on these raised pieces. It is possible to enhance the electromagnetic shield effect and suppress the influence of noise.

[0020]

1 shows a left side view of an embodiment of the present invention, FIG. 2 shows a bottom view thereof, and FIG. 3 shows a schematic sectional structure taken along the line A--A in FIG. It is explanatory drawing shown at the time of the assembly as an example.

According to these figures, the whole is the same as the conventional example shown in FIG. 6, and has a chassis portion 11 having an electromagnetic shield effect to support the mounting circuit board 18, and a front surface side of the chassis portion 11. The front panel portion 21 is attached, and the cover portion 31 is detachably provided on the chassis portion 11 and also has an electromagnetic shield effect.

Among them, the chassis portion 11 is a pillar member 17 on which a horizontally mounted mounting circuit board 18 is erected.
It is formed by including a bottom plate portion 12 that supports the bottom plate portion through the front plate portion 13, a front plate portion 13 in which a front end portion of the bottom plate portion 12 is folded up, and an eave portion 14 in which a front end portion of the front plate portion 13 is folded back. .

In this case, the chassis portion 11 is shown in FIG. 4 which is a sectional view taken along the line AA in FIG. 2 in each of the left and right portions except the central portion of the rear end portion 12a of the bottom plate portion 12. It is formed by providing a pair of raised piece portions 15 and 15 in the shape of an eave with a step formed by a raised portion 15a that is cut and raised and a horizontal portion 15b that is obtained by bending the tip of the raised portion 15a in the horizontal direction. ing. Reference numeral 12b in the drawing denotes a guide wing piece when it is mounted on the recorder side, and 20 denotes a connector.

Further, the front panel portion 21 has a vertical panel portion 22 having a terminal portion 24 and a knob portion 25, and an eaves-like protrusion from the upper and lower end edge portions 22a and 22b of the vertical panel portion 22 inward. It has a pair of horizontal protrusions 23, 23 provided, and has a substantially U-shaped cross section, and is formed with a structure for holding the front plate portion 13 side of the chassis portion 11.

In this case, the front panel portion 21 has the horizontal protruding piece portion 2 located on the side of the upper edge 22a of the vertical panel portion 22.
3 is between the eaves portion 14 and the tip portion 32 of the top plate portion 32.
The horizontal projection 23 and the vertical panel portion 22 are formed in such a positional relationship that a void portion 28 for introducing a can be formed, and are located on the side of the lower end edge portion 22b. It is formed by attaching to the chassis part 11 while covering the front side where the front plate part 13 is located.

On the other hand, the cover portion 31 has the space 2
8 is a top plate portion 32 in which the tip portion 32a can be freely introduced.
And a back plate part 33 in which the rear end part of the top plate part 32 is folded down,
The back plate portion 33 is formed of a support leg portion 34 in which a tip edge portion of the back plate portion 33 is freely folded back so as to come into contact with the bottom plate portion 12.

In this case, the cover portion 31 is the support leg portion 3.
4, the supporting leg portion 34 located in a non-facing portion with the pair of raised piece portions 15 and 15, that is, BB in FIG.
As is apparent from FIG. 5 showing the line cross section, the supporting leg portion 34 located in the central portion is formed by the concave supporting leg portion portion 36 which is cut and raised through the notch 35 and deformed so as to be bent in the horizontal direction. There is. In addition, reference numeral 37a in the drawing denotes a ventilation hole provided in the side plate portion 37 for heat dissipation.

On the other hand, the chassis portion 11, the front panel portion 21 and the cover portion 31 thus formed are pushed into the chassis portion 11 from the rear side thereof as shown in FIG. Therefore, a structure is adopted in which a fastening portion 41 is formed between the void portion 28 and the rear end portion 12a of the bottom plate portion 12, and is detachably covered.

That is, as shown in FIG.
The fastening portion 41 formed on the side of 8 is the upper edge portion of the vertical panel portion 22 of the front panel portion 21 with respect to the tip portion 32a of the top plate portion 32 of the cover portion 31 introduced into the void portion 28. 22a of the horizontal protrusions located on the side of 22a
It is formed by inserting the screw material 42 from the side of 3 through the through holes 23a and 38 and screwing it into the screw hole 16 provided in the eave portion 14 of the chassis portion 11.

Further, the fastening portions 43 formed between the rear end portion 12a of the bottom plate portion 12 and the pair of the raised piece portions located on the left and right sides of the rear end portion 12a of the bottom plate portion 12 respectively. As shown in FIG. 4, 15 and 15 are respectively supported under the supporting leg portion 34 side of the cover portion 31, and the bottom plate portion 12
5 is formed by placing the recessed support leg pieces 36 of the cover portion 31 on the side of the central portion of the rear end portion 12a and fitting them to each other.

The bottom plate portion 12 of the chassis portion 11 is mounted on the pair of raised piece portions 15 and 15 formed at the rear end portion 12a thereof, as described in claim 2, and is appropriately mounted. It is desirable to lay an electromagnetic shield sheet material 19 such as a synthetic resin sheet material that has been subjected to an electromagnetic shield treatment.

Since the present invention is constructed as described above, by pushing the cover portion 31 horizontally from the rear of the chassis portion 11 as shown in FIG. And the rear end portion 12a of the bottom plate portion 12
The fastening portions 41 and 43 can be formed between the and, and can be detachably covered.

In this case, as shown in FIG.
The fastening portion 41 formed on the side of 8 is the upper edge portion of the vertical panel portion 22 of the front panel portion 21 with respect to the tip portion 32a of the top plate portion 32 of the cover portion 31 introduced into the void portion 28. 22a of the horizontal protrusions located on the side of 22a
It can be formed by inserting the screw member 42 from the side of 3 through the through holes 23a and 38 and screwing the screw member 42 into the screw hole 16 provided in the eaves portion 14 of the chassis portion 11.

Further, the fastening portion 43 formed between the rear end portion 12a of the bottom plate portion 12 is provided with a pair of the respective raised piece portions located on the left and right sides of the rear end portion 12a of the bottom plate portion 12. As shown in FIG. 4, 15 and 15 are respectively supported under the supporting leg portion 34 side of the cover portion 31, and the bottom plate portion 12
It can be formed by placing the recessed support leg pieces 36 of the cover portion 31 on the side of the central portion of the rear end portion 12a and fitting them to each other, as shown in FIG.

Therefore, from the side of the fastening portion 43,
Since the screw material 42 required by the fastening portion 41 formed on the side of the void portion 28 can be swept away to make the screwing space unnecessary, a separation distance from the mounting circuit board 18 is secured. For this reason, not only can the height of the upright pillar 17 be reduced to reduce the overall thickness, but also the work for fastening the screw material can be eliminated to improve workability during assembly. be able to.

In addition, the bottom plate portion 12 of the chassis portion 11 is supported by the supporting leg portion 34 of the cover portion 31 as a result of the pair of the raised piece portions 15 and 15 being supported by the chassis under the above-described fitting structure. It is possible to ensure the covering state of the cover portion 31 with respect to the portion 11, and furthermore, the recessed support leg piece portion 36 of the cover portion 31 supports the rear end portion 12a of the bottom plate portion 12 upward to support the chassis portion. It is possible to reliably prevent the occurrence of bending on the side of 11.

Further, the pair of raised piece portions 15, 15 located on the left and right sides of the bottom plate portion 12 are the back plate portion 3 of the cover portion 31.
3, the electromagnetic shield sheet material 19 can be laid and laid on these raised piece portions 15 because it is in contact with the inner side surface, and the electromagnetic shield effect can be enhanced and the influence of noise can be effectively suppressed. can do. Thus, since the electromagnetic shield effect can be enhanced on the surface of the bottom plate 12 on the side where the raised piece 15 is located, a high voltage component or the like that is relatively likely to become a noise source is mounted on the facing portion of the mounting circuit board 18. However, the effect of noise can be further reduced by effectively shielding the electromagnetic field.

[0038]

As described above, according to the present invention, with respect to the chassis portion, the cover portion is pushed in from the rear side in the horizontal direction so that the gap portion and the rear end portion of the bottom plate portion are separated from each other. The fastening portions can be formed between them and can be detachably covered.

In this case, the fastening portion on the side of the void is inserted from the side of the horizontal projecting piece located at the upper edge of the vertical panel with respect to the tip of the cover introduced into the void. Then, a screw member may be screwed on the side of the eaves portion of the chassis portion.

Further, the fastening portion formed between the rear plate portion and the rear end portion of the bottom plate portion supports the raised piece portions located on the left and right of the bottom plate portion under the supporting leg portion of the cover portion. And,
It can be formed by placing the recessed support leg pieces of the cover on the side of the central portion of the bottom plate and fitting them together.

Therefore, from the side of the fastening portion formed between the bottom plate portion and the rear end portion, the screw material can be swept away to make the screwing space unnecessary, so that the entire thickness can be reduced. Not only can this be made thinner, but the work for fastening the screw material can be reduced and the workability during assembly can be improved.

Moreover, since the pair of raised pieces located on the left and right of the bottom plate are in contact with the inner side surface of the back plate of the cover, the electromagnetic shield sheet material is mounted on these raised pieces. It is possible to enhance the electromagnetic shield effect and suppress the influence of noise.

[Brief description of drawings]

FIG. 1 is a left side view of an embodiment of the present invention.

FIG. 2 is a bottom view of the embodiment shown in FIG.

FIG. 3 is an explanatory view showing a cross-sectional structure taken along the line AA in FIG. 2 when assembled, as an example.

FIG. 4 is an explanatory diagram showing an example of a sectional structure taken along line AA in FIG. 2 after completion of assembly.

5 is an explanatory diagram showing an example of a sectional structure taken along line BB in FIG. 2 after completion of assembly.

FIG. 6 is an explanatory view showing an input unit as a conventional example corresponding to FIG.

[Explanation of symbols]

 11 chassis part 12 bottom plate part 12a rear end part 12b guide wing piece 13 front plate part 14 eaves part 15 raised piece part 15a rising part 15b horizontal part 16 screw hole 17 pillar material 18 mounting circuit board 19 electromagnetic shield sheet material 20 connector 21 Front panel part 22 Vertical panel part 22a Upper edge part 22b Lower edge part 23 Horizontal projecting piece part 23a Through hole 24 Terminal part 25 Knob part 28 Void part 31 Cover part 32 Top plate part 32a Tip part 33 Back plate part 34 Support leg part 35 Notch 36 Recessed leg piece 37 Side plate 37a Ventilation hole 38 Through holes 41, 43 Fastening part 42 Screw material

Claims (2)

[Claims] 1. A chassis portion including a bottom plate portion for supporting the mounted circuit board, a front plate portion obtained by folding up a front end portion of the bottom plate portion, and an eave portion obtained by folding back a front edge portion of the front plate portion. The vertical panel portion has a pair of horizontal projecting portions projecting inwardly from both upper and lower edge portions and has a substantially U-shaped cross section, and a void portion is formed between the eave portion and the front surface thereof. A front panel part which is attached to the chassis part while covering the side, a top plate part in which the tip part can be freely introduced into the void part, and a back plate part in which the rear end part of the top plate part is folded down. A cover portion formed of a supporting leg portion in which a tip edge portion of the back plate portion is folded back so as to be freely brought into contact with the bottom plate portion, and the cover portion is pushed into the chassis portion from the rear thereof and the gap is formed. To the input unit of the recorder which is detachably covered by forming a fastening portion between the bottom portion and the rear end portion of the bottom plate portion. In the chassis part, in each of the left and right parts except the central part in the rear end part of the bottom plate part, a raised part that is cut and raised,
A pair of raised piece portions formed by a horizontal portion obtained by horizontally bending the tip end portion of the rising portion is provided, and in a supporting leg portion of the cover portion, a non-faced portion with the raised piece portion is provided. , A concave support leg piece portion that is bent and deformed in the horizontal direction through a notch is provided, and the fastening portion formed on the side of the void portion is the tip portion of the cover portion introduced into the void portion. On the other hand, by inserting from the side of the horizontal protruding piece located at the upper edge of the vertical panel portion and screwing a screw material on the side of the eaves portion of the chassis portion, The fastening portion formed between supports the raised piece portions located on the left and right of the bottom plate portion on the side of the support leg portion of the cover portion, and at the side of the central portion of the bottom plate portion of the cover portion. An input unit structure for a recorder, characterized in that the concave support leg pieces are placed and fitted to each other. 2. The input unit structure of the recorder according to claim 1, wherein an electromagnetic shield sheet material is laid down on the bottom plate portion of the chassis portion so as to reach the pair of raised piece portions.