Source: https://patents.google.com/patent/JP4170782B2/en
Timestamp: 2020-04-04 05:40:02
Document Index: 99965931

Matched Legal Cases: ['art 51', 'arts 14', 'art 14', 'art 55', 'art 55', 'art 51']

JP4170782B2 - Electronic equipment box mounting structure - Google Patents
Electronic equipment box mounting structure Download PDF
JP4170782B2
JP4170782B2 JP2003013969A JP2003013969A JP4170782B2 JP 4170782 B2 JP4170782 B2 JP 4170782B2 JP 2003013969 A JP2003013969 A JP 2003013969A JP 2003013969 A JP2003013969 A JP 2003013969A JP 4170782 B2 JP4170782 B2 JP 4170782B2
JP2003013969A
JP2004228325A (en
正彦 村瀬
2003-01-22 Application filed by マスプロ電工株式会社 filed Critical マスプロ電工株式会社
2003-01-22 Priority to JP2003013969A priority Critical patent/JP4170782B2/en
2004-08-12 Publication of JP2004228325A publication Critical patent/JP2004228325A/en
2008-10-22 Publication of JP4170782B2 publication Critical patent/JP4170782B2/en
The present invention relates to a box mounting structure for an electronic device in which a box that houses a printed circuit board on which circuit components are mounted is attached to the main body of the electronic device.
In recent years, in the process of mounting circuit components on printed circuit boards of electronic devices, automatic mounting devices configured to automatically mount surface mount components, through-hole components, etc. at predetermined positions have been widely introduced and work in the mounting process Time saving and labor saving are realized. Normally, when automatic mounting of circuit components is performed with this device, a base substrate having an external dimension standardized on the mounting line of the device is prepared in advance, and a plurality of printed circuit boards having the same shape and wired in the same pattern are prepared on the base substrate. It is arranged so that it can be taken. By doing so, it is possible to increase the number of mounting parts per base substrate and perform the mounting process by the automatic mounting apparatus more efficiently.
For example, two printed circuit boards 51, 51 having the same rectangular shape are arranged on the base substrate 50 in FIGS. These printed circuit boards 51 and 51 are provided with an outer frame serving as an outer peripheral edge of the base board 50 in order to secure strength sufficient to withstand the mounting process and transport process of circuit components by an automatic mounting apparatus and at the same time to make it easy to individually divide after completion of mounting. It is arranged in 52 via a groove 53 and a V cut 54. The printed circuit boards 51 and 51 are connected to each other by two perforations 55. Illustration of pattern wiring and mounted parts on the printed circuit boards 51 and 51 is omitted.
The individual printed circuit boards 51 that have been divided after the completion of mounting are, for example, from noise entering from outside or the high frequency circuit of the printed circuit board itself when a high frequency circuit is mounted for an electronic device such as a satellite broadcasting system or a CATV system. In order to shield radiated noise, it is usually housed in a shield case and mounted in the electronic device body. For example, as a conventional shield case, the one described in Patent Document 1 is known. The shield case of this patent document 1 is to store the printed circuit board 51 so as to be covered with a pair of shield cases having the same shape from both the upper and lower sides, and is provided on the tongue piece provided on the case side and the electronic device main body rear panel. The tongue piece is attached to the electronic device main body by screwing.
Japanese Patent Laid-Open No. 6-196889
However, in the shield case of Patent Document 1, since the divided perforation portion 55 is left as a protrusion on one long side end portion 51a of the printed circuit board 51, the long side end portion 51a and the side surface of the shield case are left. There was a problem that the inside of the printed board 51 could not be stored in close contact, and the component mounting effective area of the printed circuit board 51 was reduced by the gap. Moreover, since a space for providing a tongue piece for screwing is required between the shield case of Patent Document 1 and the electronic device main body, there is a problem that the electronic device main body is enlarged by that amount. .
In order to solve these problems, a shield case 60 as shown in FIGS. 3 and 4 has been devised. The shield case 60 includes a side cover 61 whose upper and lower surfaces are open, and an upper cover 62 and a lower cover 63 that can close the upper and lower surfaces of the side cover 61, respectively. Side portions 62 a and 63 a that can be attached to the upper and lower peripheral end portions of the side cover 61 protrude from the upper surface cover 62 and the lower surface cover 63, respectively. In the side cover 61, when the printed circuit board 51 is stored, a screwing portion 64 is bent at a position where the perforated portion 55 hits, and an opening 65 is opened by the bending. Further, a screwing portion 66 similar to the screwing portion 64 is also formed on the opposing surface of the side cover 61 by bending at one place. Further, the side cover 61 is provided with four fixing protrusions 67 for fixing the printed circuit board 51 at predetermined positions.
In the shield case 60, the printed circuit board 51 is assembled from the lower surface of the side cover 61 with the perforated portion 55 aligned with the opening 65. In a state where the printed circuit board 51 is fixed at a predetermined position by the fixing protrusion 67 of the side cover 61, the opening 65 allows the perforation 55 to escape to the outside, and the long side end 51 a of the printed circuit board 51 is formed inside the side cover 61. Adhere to the side. The printed circuit board 51 is housed in the shield case 60 by attaching the upper surface cover 62 and the lower surface cover 63 to the side surface cover 61.
According to the shield case 60, the screwing portion 64 is bent and formed in accordance with the position of the perforation portion 55, and the perforation portion 55 is allowed to escape outward from the opening 65. The part 51a can be stored in close contact with the inside of the side surface of the shield case 60, and the component mounting effective area can be increased by the gap generated in the shield case of Patent Document 1.
However, as in Patent Document 1, the shield case 60 is attached by screwing the screw fixing portions 64 and 66 formed by bending from the side thereof and the screw fixing bases 68 and 69 of the electronic device main body 70 with screws 58. For this reason, there still remains a problem that the electronic device main body 70 is increased in size by the screwing space.
In addition, the side cover 61 increases in height in the vertical direction as the component height of the circuit component mounted on the printed circuit board 51 is increased. Therefore, a circuit component having a high component height is provided on the lower surface side of the printed circuit board 51. At the time of mounting, it is necessary to secure the height of the lower surface cover 63 and the printed circuit board 51 by moving the bending position of the screwing section 64 that allows the perforated portion 55 of the printed circuit board 51 to escape. In this case, the opening 65 having an enlarged opening area cannot be completely closed by the side portion 63a of the lower surface cover 63, and the shield characteristic of the shield case 60 is deteriorated.
In view of these problems, the present invention provides a box mounting structure for an electronic device that can increase the component mounting effective area of the printed circuit board regardless of the protrusion of the protrusion, reduce the size of the electronic device, and further prevent deterioration of the shield characteristics. The challenge is to achieve this.
In order to solve the above-described problem, a box attachment structure for an electronic device according to the invention of claim 1 includes a printed board having a protrusion protruding from a predetermined position at a peripheral edge, a box for storing the printed board, said box body comprising a box body mounting structure of an electronic device comprising a mounting means for mounting within the electronic apparatus main body, said attachment means, to the outside in accordance with the protruding direction of the protrusion on the wall of the box body and the locking portion to escape the protrusion outwardly, the hook caught by the upper end of the locking portion from the bottom surface of the electronic apparatus main body together with the protrusion in a state of being squeezed formed accommodating the printed circuit board is fitted a locking piece formed by providing a base which defines the height, Tona is, the said locking piece the box body locked by hooking the hook of the upper end portion of the locking portion electronics Configured to be attached to the body .
Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or similar component in each figure. FIG. 1 is an exploded perspective view showing an embodiment of a box attachment structure for an electronic device according to the present invention, and FIG. 2 is an enlarged cross-sectional view of the main part AA of FIG.
An electronic device 20 shown in FIGS. 1 and 2 includes a printed circuit board 51 of FIG. 5 in which high-frequency circuits are patterned, a metal shield case 10 that houses the printed circuit board 51, and the shield case 10 made of synthetic resin. It is comprised from the attachment means 22 attached in the main body 21. As shown in FIG. As described above, the printed circuit board 51 is formed in a rectangular shape, and two perforated portions 55 project as protrusions from one long side end of the printed circuit board 51.
The shield case 10 includes a side cover 11 whose upper and lower surfaces are open, and an upper cover 12 and a lower cover 13 that can close the upper and lower surfaces of the side cover 11, respectively. The upper surface cover 12 and the lower surface cover 13 are provided with side portions 12a and 13a that can be mounted on the peripheral edges of the upper and lower surfaces of the side surface cover 11, respectively. The side cover 11 is provided with four fixing protrusions 17 for fixing the printed circuit board 51 at predetermined positions.
In the side cover 11, when the printed circuit board 51 is stored, a squeezed portion 14 that is pressed so as to squeeze outwardly in accordance with the projecting direction of the protrusion at a position where the perforated portion 55 hits is used as a locking portion. Is formed. The squeezed portion 14 has a squeezed width slightly wider than the width of the perforated portion 55, a squeezed height from the lower surface of the side cover 11 to the vicinity of the fixed position of the printed circuit board 51, and a protruding length of the perforated portion 55. Further, the squeezing amount in the projecting direction is slightly longer, and the squeezed shape is formed into a cross-sectional arch shape that substantially matches the projecting shape of the perforated portion 55. Further, an opening 15 is formed between the squeezed portion 14 and the lower end portion of the side cover 11 by an amount corresponding to the protruding height of the side portion 13 a of the lower surface cover 13. The side cover 11 is formed with a squeezed portion 16 similar to the squeezed portion 14 in the vicinity of the center of the opposing side surface.
The electronic device main body 21 is formed in a box shape whose upper surface is opened by, for example, injection molding. The electronic device main body 21 has a total of three locking pieces 18 and 19 protruding from the bottom surface to be locked to the squeezed portions 14 and 16. The locking pieces 18 and 19 are composed of flanges 18a and 19a that are hooked on the upper ends of the squeezing parts 14 and 16, and plate-like bases 18b and 19b that define the height from the bottom of the flanges 18a and 19a. Has been.
In the box mounting structure for an electronic device having the above-described configuration, the printed circuit board 51 is fixed at the fixing position of the fixing protrusion 17 so that the perforated portion 55 is aligned with the opening portion 15 and further aligned with the squeezed portion 14. With the printed circuit board 51 fixed, the squeezed part 14 fits into the perforated part 55 and escapes the perforated part 55 to the outside, and the long side end part 51 a of the printed circuit board 51 is in close contact with the inner surface of the side cover 11. Let The printed circuit board 51 is accommodated in the shield case 10 by attaching the upper surface cover 12 and the lower surface cover 13 to the side surface cover 11. At this time, the opening 15 is closed by the side 13 a of the lower surface cover 13.
The shield case 10 in which the printed circuit board 51 is housed is mounted in the electronic device main body 21 by mounting means 22 including the squeezed portions 14 and 16 and the locking pieces 18 and 19. Specifically, the squeezed portions 14 and 16 of the printed circuit board 51 are aligned with the locking pieces 18 and 19 of the electronic device main body 21, and the hooks of the locking pieces 18 and 19 are placed on the upper ends of the squeezed portions 14 and 16. By hooking 18a and 19a, the shield case 10 is locked and attached in the electronic device main body 21.
Thus, according to the above configuration, the squeezed portion 14 is aligned with the shield case 10 at the position of the perforated portion 55 of the printed circuit board 51, and squeezed out according to the protruding direction of the perforated portion 55. Since it is fitted to the portion 55 so as to escape to the outside, the printed circuit board 51 can be accommodated with the long side end 51 a of the printed circuit board 51 being in close contact with the inner side surface of the shield case 10. Therefore, the component mounting effective area of the printed circuit board 51 can be increased by the gap, similarly to the conventional one shown in FIGS. 3 and 4, regardless of the protrusion of the perforation 55. Further, even when a circuit component having a high component height is mounted on the lower surface side of the printed circuit board 51, the opening 15 can be closed almost entirely, and the deterioration of the shielding characteristics of the electronic device 20 can be prevented.
Moreover, the space for providing the conventional mounting screw portion is not required, and the electronic device 20 can be miniaturized. In addition, the shield case 10 can be easily attached / detached as compared with the attaching / detaching work using screws, and the manufacturing time of the electronic device 20 can be reduced by shortening the work time for assembly and disassembly.
The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the shape and configuration of each part without departing from the spirit of the present invention, as exemplified below. .
(1) The squeezed portions 14 and 16 are squeezed out from the lower end so that the opening 15 does not occur in the shield case 10. In this case, it is desirable to provide a notch portion with a notch width that matches the squeezed width of the squeezed portion 14 in the side portion 13 a of the lower surface cover 13. By so doing, it is possible to further prevent deterioration of the shielding characteristics of the electronic device 20.
(2) The base portions 18b and 19b of the locking pieces 18 and 19 are substituted by the wall surface of the electronic device main body 21, and the flange portions 18a and 19a are provided on the wall surface of the electronic device main body 21 so that they can be arranged at a specified height from the bottom surface. Also good. In this way, the distance between the shield case 10 and the electronic device main body 21 can be further narrowed, and the electronic device 20 can be further reduced in size.
(3) The box is not limited to a metal material, and may be formed using only a synthetic resin material or a mixture of a metal material and a synthetic resin material.
(4) The electronic device body is not limited to a synthetic resin material, and may be formed using only a metal material or a mixture of a synthetic resin material and a metal material.
(5) The protrusion is not limited to the perforation 55 as long as it protrudes from a predetermined position at the peripheral edge, but is, for example, a connector support, a printed board fixing screw hole, or a specific shape of the applied electronic device. It may be a protrusion or the like associated with.
(6) The number of the locking portions is not limited to three, and is larger than the number of protrusions according to at least the protruding position of the protrusion, and an arbitrary number is provided on each of the front, rear, left and right side surfaces of the box, and You may provide the locking piece to stop in an electronic device main body.
(7) When the upper ends of the squeezed portions 14 and 16 and the hooks 18a and 19a of the locking pieces 18 and 19 are hooked and locked, the contact between the two portions is not limited to surface contact, and one of them is acutely angled. It may be formed to be line contact or point contact. Further, the contact surfaces of both portions are not limited to flat surfaces, and may be formed on curved surfaces or uneven surfaces.
As described in detail above, according to the first aspect of the present invention, the component mounting effective area of the printed circuit board can be increased regardless of the protrusion of the protrusion. In addition, a space for providing a mounting screw portion as in the prior art is not required, and the electronic device can be miniaturized. Furthermore, the opening can be closed almost entirely, and the shield characteristics of the electronic device can be prevented from deteriorating. In addition, the box can be easily attached to and detached from the electronic device main body, and the manufacturing time of the electronic device can be reduced by shortening the work time for assembly and disassembly.
FIG. 1 is an exploded perspective view showing an embodiment of a box mounting structure for an electronic device according to the present invention.
FIG. 2 is an enlarged cross-sectional view of the main part AA of FIG.
FIG. 3 is an exploded perspective view showing a box mounting structure of a conventional electronic device.
4 is an enlarged cross-sectional view of a main part BB in FIG. 3 showing an attachment state.
FIGS. 5A and 5B show a printed circuit board arrangement in the case of taking two sheets, where FIG. 5A is a front view and FIG. 5B is a side view.
10 .. Shield case as box, 14, 16.. Squeezed portion as locking portion, 15 .. Opening portion, 18, 19 .. Locking piece, 20 .. Electronic equipment, 21. Main body, 22... Mounting means, 51... Printed circuit board, 55.
A box mounting of an electronic device comprising: a printed circuit board having a protrusion protruding from a predetermined position of a peripheral edge; a box for storing the printed circuit board; and a mounting means for mounting the box in the electronic device main body. Structure,
The attachment means includes
And the locking portion to escape the protrusion together with the protrusion in the squeeze formed outside while accommodating the printed circuit board is fitted to the outside in accordance with the protruding direction of the protrusion on the wall of the box body, the engagement a locking piece formed by providing a hook portion hooked to the upper end of the stopper portion to the base portion to define a height from the bottom surface of the electronic apparatus main body, Ri Tona,
Locking the hook by hooking the hook of the locking piece to the upper end of the locking portion and attaching the box inside the electronic device main body,
Electronic equipment box mounting structure.
JP2003013969A 2003-01-22 2003-01-22 Electronic equipment box mounting structure Expired - Fee Related JP4170782B2 (en)
JP2003013969A JP4170782B2 (en) 2003-01-22 2003-01-22 Electronic equipment box mounting structure
JP2004228325A JP2004228325A (en) 2004-08-12
JP4170782B2 true JP4170782B2 (en) 2008-10-22
ID=32902157
JP2003013969A Expired - Fee Related JP4170782B2 (en) 2003-01-22 2003-01-22 Electronic equipment box mounting structure
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