JPS5890798A - Desktop terminal device structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to the structure of a desktop terminal device used in communication devices, computers, etc.

(2) Technical Background In general, this type of desktop terminal equipment converts a digital signal into an analog signal or vice versa when transmitting or receiving an information signal using a transmission path, or converts a digital signal into an analog signal or vice versa. It is used to perform Sbee-P conversion, etc. The structure of the device is such that electronic components such as transformers, power switches, terminals, etc., and printed boards with transistors and other electronic components necessary for circuit functions are housed inside the housing, and the upper part of the housing is It is covered with a butterfly ceiling cover, and the front of the case is covered with a front cover.

In addition, this woodcutter's equipment was mainly used by placing it on a tabletop, but in recent years, it has been used not only on a tabletop, but also on a tabletop.
Increasingly, it is being used by being housed in a rack structure (a vertical rectangular casing) or the like. Therefore, in order to improve mounting efficiency, a compact external shape is required, and the ceiling cover and front cover can be easily attached and detached, allowing quick maintenance operations, and the simple structure shortens the manufacturing process, making it suitable for mass production. There is a demand for a vehicle-mounted terminal device structure.

(3) Prior art and problems Figures 1 and 2 are perspective views for explaining the structure of a conventional on-vehicle terminal device. Figure 1 shows the state with the front cover open, and Figure 2 1 shows a state in which the ceiling cover (0) is separated from the main body of the device (I: I).

In both figures, 1 is the main body of the device, 2 is the housing, 2a is the bottom plate of the housing, 2b is the bottom plate of the housing, 3 is the ceiling cover, 3a is the engaging claw, 3b is the ventilation hole, 3c is the ceiling cover ( qmJ board, 3d
Holds the screw! Lock, 3 is a fastening screw, 4 is a front plate, 4
m is an engagement claw, 5Fi rear plate, 5a is a screw hole, 5b is a ventilation hole, 5e is a mineral fuse, 5d is a cable insertion hole, 5 is a ground terminal, 5fFi power connector, 5g is an interface connector, 6 is a transformer , 7 is the measurement jar, ri, 8t
- indicates the power switch and 9 indicates the printed board, respectively. In this specification, the front plate 4 @ is called the front of the device, the rear plate 51i1 is called the rear, and the housing 2 is called the side plate 2.
A front plate 4 and a rear plate 5 are respectively attached to the front and rear ends of the body. A transformer 6, a measuring jack 7, a power switch 8, and the like are arranged on the bottom plate 2a, and a printed board 9 on which electronic components such as transistors (not shown) are mounted is also fixed separately from these. A display rung 4b, a measuring jack 7, a power switch 8, and the like are arranged on the front panel 4. The front cover 1 (l) is arranged to cover the front surface of the front plate 4, and its lower both sides are attached to the lower part of the front plate 4 via hinges 10m, so that it can be rotated to open and close. Permanent magnets 10b are attached to both upper sides of 10, and an open position fixing member 10e is attached to one side.

Therefore, when this front cover lO is closed, the permanent magnet 1
The cover 10 is fixed on the front plate 4 by the attraction force of the cover 10b, and when opened, the planar part of the cover 10 is positioned and fixed in a substantially horizontal state by the open position fixing member 10e. When mounting the ceiling cover 3 on the main body l, fit the engaging claw 4a provided on the front plate 4 between the engaging claw 3a of the cover 3 and the downward direction of the cover 3, and then tighten. Screw the screws 3 into the screw holes 5 of the rear plate 5, and tighten the grooves 3d fixed to the side plate 3e onto the rear panel 5.

Conversely, when removing the ceiling cover 3, each fastening screw 3
The structure of this conventional terminal device, in which the cover 3 must be removed after loosening and removing the cover 3, is constructed as described above, but it has the following problems. Firstly, the manufacturing process is complicated because the printed circuit board 9 and the transformer 6 are attached separately, and the electrical functions can only be inspected after all the parts have been assembled into the housing 2. Therefore, it is inconvenient for the progress of the work, and therefore the structure is not suitable for mass production. Second, ordinary transistors and at most integrated circuits (I
Since components such as C) are used, a large-sized printed board is required, and due to reasons such as securing heat dissipation space for the components, the casing structure is inevitably large and power consumption is high.Thirdly, the ceiling cover Attaching and detaching requires tools such as screwdrivers and is time-consuming. Fourth, since the front cover is equipped with a hinge, a permanent magnet, and an open position fixing member, there are many parts, and these parts occupy a part of the operation surface of the front plate, so the effective operation area is reduced. is decreased, which is not desirable.

(4) Purpose of the Invention In view of the above-mentioned problems of the prior art, the present invention has a structure suitable for mass production, has a compact external shape, and is easy to attach and detach the ceiling cover and front cover without the need for tools. The object of the present invention is to provide an on-vehicle terminal device structure that can be quickly installed.

(5) Structure of the Invention In order to achieve this object, according to the present invention, a front layer of a printed circuit board on which electronic components are mounted. ! a printed board assembly formed by attaching a front plate and a rear plate to each end thereof;
A paper machine having a U-shaped cross section and storing and fixing the printed board assembly with its opening facing upward;
A ceiling plate is formed in a shape and is removably attached to the bottom plate at the top 6 when looking at the printed board assembly with its opening facing downward; It consists of a front cover that is removably fitted into the front part of the board, and the bottom plate and the ceiling board are engaged by a plurality of sets of engaging claws provided in correspondence with each other on each side plate of both the boards. t'1. The ceiling plate is fixedly fixed to the bottom plate by elastically inserting and engaging the second elastic insertion lock into the engagement hole provided in the rear plate, and furthermore, the upper opening cover is fixed to the bottom plate. A plurality of retaining holes provided in the fitting portion elastically engage with respective retaining protrusions provided in the bottom plate and the ceiling plate in correspondence with the retaining holes, thereby fixing between the drawing boards. Provided is a sagami-shaped lake-end device structure characterized by the following features:

(6) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail based on the drawings. 3 to 9 are diagrams for explaining the desktop type terminal according to the present invention.

FIG. 3 is an exploded perspective view of the device structure of the present invention.

As shown in FIG. 3, the device structure of the present invention includes a printed board assembly 11 (Figure (A)), a bottom plate 15 (Figure (B)), a ceiling plate 16 (Figure (C)), and a front cover 17 (Figure 3). ) It consists of four parts (Figure). The printed board assembly 11 includes a printed board 12, and a front plate 13 and a rear plate 14 attached to the front and rear ends of the printed board, respectively, so as to form a plane perpendicular to the plane of the n-core printed board. Constructed. Although not shown, the printed circuit board 12 includes a particularly adopted large-scale integrated circuit (
(hereinafter referred to as LSI) and other electronic components necessary for circuit function. Further, mounting holes 121L are provided at the four corners and the center of the printed board 12. In this way, LSI
By adopting this, the printed board 12 can be made extremely compact. On the front plate 13, electronic components such as a measuring jack 131, a display run f13b, and a power switch 138 are arranged, and on the stress relief face plate 14, an interface connector 1 is arranged.
Electronic components such as 4a and fuse 14b are arranged.

In this way, the printed board assembly 11 is formed with all the electronic components necessary for the terminal equipment 9 circuit functions mounted thereon.

Therefore, there is an advantage that the electrical functions can be adjusted and inspected in the state of the printed board assembly 101;t itself. This can simplify the manufacturing process of the device and is advantageous for mass production. The bottom plate 15 is press-molded to have a U-shape in transverse direction, and side plates 15m are provided on both sides in the front-rear direction. L-shaped engaging claws 15b are attached to four locations on the sheared portions of both side plates 15a. On the top surface of the bottom plate 15, there are mounting holes 12 and 5 for the printed board 12 at the four corners and the center.
A support member 15d of screw Otake is attached correspondingly, and locking protrusions 15e are provided at two places on the left and right sides of the upper surface of the front part. The support member 15d is for supporting and fixing the printed board 12 on the bottom plate 15 at a constant height.
The printed board 12 is screwed onto the mounting hole 12m by a fastening screw 18 and a washer 18' on the mounting hole 12m. The retaining protrusion 156 engages with a retaining hole 17b of the front cover 17, which will be described later. On the other hand, the bottom surface of the bottom plate 15 has four corners.
There are rubber 17dllll'5. The ceiling plate 16 is press-molded into the same shape as the bottom plate 15. L-shaped engaging claws 16b are located at four locations on the front and rear sides of each side plate 16m of the ceiling plate 16, and the engaging claws 15b of the bottom plate 15
and are arranged so as to be able to engage with the engaging claws 15b from the horizontal direction. Further, each side plate 16m is provided with a ventilation hole 16d. Engagement protrusions 16e are provided at two places on the left and right sides of the lower front surface of the ceiling plate 16, facing the engagement protrusions 15@ of the bottom plate 15. A part of the section is cut in the front-rear direction and bent downward for installation.
(see Figure 7) is formed. This installation! As shown in Figures 5 and 6, the racket is equipped with Nailatsuchi (trade name).
An elastically engaging insertion lock stop 19 is attached with its axis directed in the front-rear direction. The front cover 17 is made of an elastic material, such as a resin material, and has a box shape with an opening 17a (see FIG. 9) along the longitudinal direction. Retaining holes 17 are provided on the left and right sides of the upper and lower surfaces of the fitting portion 17m provided at the outer end of this opening 17@.
b is provided. Each of the retaining holes 17b is connected to the bottom plate 1.
5 and the engaging protrusions 15e and 16e of the ceiling plate 16, respectively.

FIG. 4 is an assembled perspective view of the device structure shown in FIG. 3. As shown in the figure, the device structure of the present invention has a compact external shape and is compact.

Next, the assembly procedure of this device structure will be explained. FIG. 5 shows a state in which the printed board assembly 11 is housed and fixed on the bottom plate 15 and the ceiling plate 16 is placed above it.

That is, as explained in FIG.
1 is the support member 15d of the bottom plate 15 via the printed board 12
It can be easily added by simply fixing it to the top with a screw 18. Next, move the upper ceiling plate 16 downward (arrow A) as shown in FIG.
Close to the end face of 5m. Subsequently, the two end surfaces are brought into contact with each other and then slid in the direction of arrow B. As a result, as shown in FIG. 7, the engaging claws 15b and 16b engage from the horizontal direction, and at the same time as The ceiling plate 16 is the bottom plate 1.
5 and is easily engaged and fixed.

The tip 19 consists of a locking knob member and a locking member made of nylon (trade name), and the insertion shaft is hollow and has an axial slot and a part of the shaft. Six locations are provided along the outer periphery in the radial direction. Therefore, when this insertion shaft part is fitted into the engagement hole 14e and the gripping member is pushed in, the convex portion #'i is elastically deformed and the locking member becomes larger than the engagement hole 14e. Fix it and pull the knob to restore it to its original shape.

In this way, the nylon latch 19 engages with the engagement hole 14e in a controlled manner, and is easily pulled out with a predetermined tensile force. 8th
The figure is a sectional view taken along the line CC in FIG. 7, and shows the bottom plate 15, the ceiling plate 16, and the engaged state of the engaging claws 15b and 16b, respectively, as seen from the front and rear directions. As shown in the figure, the bottom plate 15 and the ceiling plate 16 have a very simple shape and are formed into the same shape. FIG. 9 is an explanatory diagram of the attachment of the front cover 17. As shown, from the direction of the arrow, the front cover 17
are fitted into the front ends of the bottom plate 15 and ceiling plate 16.

Incidentally, the dashed-dotted line indicates the front cover 17 at the rear.

At the time of fitting, the free end side of the fitting part 17m of the front cover 17 is pushed up by the engagement protrusions 15c and 16c, elastically deforms and advances, and the engagement hole 17b is inserted into the protrusion 15c+16e.
When they reach and match, the elastic force restores the original shape. In this way, the protrusions 15e, 16e and the engagement hole 17b
easily engage elastically. Further, the front cover 17 can be easily removed by the above-mentioned reverse operation. FIG. 1θ is a comparison diagram of the embodiment of the present invention described above and the conventional example shown in FIG. 1 shows a conventional example, and FIG. In the same figure, 21 is 19 inches 2. American glue, IA (El
@ctronic Industries Aimoe
(iatlon) standard, the former dimensions were called IU according to the above standards, and H3 was Hl.
3 times that is, 3U%W, respectively, represents 450.85+w+. (B) As shown in the figure, in the conventional example, only one unit could be stored in the wxu3 space, but in the embodiment of the present invention, as shown in (b) figure, two units can be stored in parallel in the WXH1 space. It is possible to store six units in the space of one WXHI in the conventional example. in this way,
The implementation efficiency has been greatly improved. This fact is of course advantageous when used in a tabletop arrangement. (7) Effects of the Invention As explained in detail above, the tabletop terminal device structure of the present invention has greatly improved mounting efficiency and power consumption. The ceiling panel and front panel can be easily and quickly attached and detached without the need for tools, and the structure is simple and the electrical functions of the circuit can be adjusted and inspected while the printed board is still assembled. Therefore, there is a great effect that mass production is possible.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams showing the structure of conventional desktop terminal equipment;
3 to 9 are diagrams showing the structure of a desktop terminal device according to the present invention, in which FIG. 3 is an exploded perspective view, FIG. 4 is an assembled perspective view, and FIG. 5 is a printed board assembly 11 on a bottom plate 15. 6 is an explanatory diagram when the ceiling plate 16 is attached to the bottom plate 15, and FIG. 7 is a perspective view showing the state in which the ceiling plate 16 is attached to the bottom plate 15.
FIG. 8 is a sectional view taken along the line C-C in FIG. It is a comparison diagram when the container structure of the present invention (Fig. A) and the container structure of the present invention (Fig. B) are housed in a girder structure of the same size. 11... Glint plate, 12... Glint plate assembly,
13...Front plate, 14...Rear plate, 15.1.Bottom plate, 15't16&...Side plate, 15b, 16b...Engaging claw, 15C116c...Engaging protrusion, 16... Ceiling plate, 17...Front cover, 17a...Inset part, 17
b...Engagement hole, 19...Nylatch (elastic insert type locking device). Figure 1 Figure 4 Figure 5 Figure 4D Figure 6 Figure 7 Figure 8 G

Claims (1)

[Claims] 1. At the front and rear ends of the printed circuit board with electronic components mounted on it.
A printed board assembly formed by attaching a front plate and a rear plate, a bottom plate formed in a U-shaped cross section and housing and fixing the printed board assembly with its opening facing upward; a ceiling plate formed in the same shape and removably attached to the bottom plate across the printed board assembly with its open part facing downward; and a front cover removably fitted into the front end of the base plate, and the bottom plate and the ceiling plate are engaged by a plurality of sets of engaging claws provided in correspondence with each other on each side plate of the bottom plate and the ceiling plate. The two elastic insertion locks provided on the ceiling plate are elastically inserted into and engaged with the retaining holes provided on the rear panel, whereby the ceiling plate is secured to the bottom plate. and a plurality of retaining holes provided in the fitting portion of the front cover plate are elastically engaged with respective retaining protrusions provided in the bottom plate and the ceiling plate corresponding to the retaining holes. A tabletop terminal device structure, characterized in that it is fixed between the drawing boards by fitting them together.