JP2011222890A - Shield case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which allows downsizing while maintaining electrical contact.SOLUTION: A box-shaped case body 10 with its upper side open includes a side plate 10b having an upper edge folded inward to form a corner. Along the corner, a plurality of introduction holes 10c are formed at predetermined intervals, and a plurality of engagement holes 10a are formed under the respective introduction holes 10c. When a lid 11 is attached to close the upper opening of the case body 10, claws 15 formed at each side of the lid 11 is introduced into the introduction holes 10c and a protrusion 15a of each claw 15 elastically engages in each engagement hole 10a.

Description

  The present invention relates to a shield case for electronic equipment used for the purpose of preventing leakage and interference of radio waves.

  A conventional shield case for a general electronic device is composed of a case main body and a lid portion fitted on the case main body. An example of the configuration of such a shield case 100 for a conventional electronic device is shown in FIGS. 12 is a perspective view showing a configuration of a conventional shield case 100, FIG. 13 is an enlarged perspective view of a part of the configuration of the conventional shield case 100, and FIG. 14 is a conventional shield case. FIG. 15 is a perspective view showing a configuration of a main body of a conventional shield case 100, and FIG. 16 is a perspective view showing a configuration during assembly of the conventional shield case 100. It is.

  As shown in FIG. 12, the conventional shield case 100 includes a rectangular parallelepiped main body 110 and a lid 111 that is fitted so as to close the upper surface of the main body 110 that is opened. The main body portion 110 and the lid portion 111 are made by processing a metal plate, and a circuit board on which a high frequency (RF) circuit or the like is assembled is housed in an internal housing space. Four coaxial plugs 112 are provided on one side surface of the main body 110, and an RF signal input from the coaxial plug 112 is input to an internal circuit board or an RF signal output from the internal circuit board. Can be output via the coaxial plug 112. Each of the four sides of the lid portion 111 is provided with a large number of claw portions 115 formed at a predetermined interval, and the claw portions 115 are bent substantially perpendicularly downward at the sides. A number of claw portions 115 formed on the four sides of the lid portion 111 are elastically pressed against the upper outer surface of the side plate 110b of the main body portion 110 when the lid portion 111 is fitted on the main body portion 110. The part 111 is attached to the main body part 110.

  As shown in the enlarged view of FIG. 13, the claw portion 115 is formed with a convex portion 115a that protrudes inward slightly from the center, and is formed in a tapered shape so as to be inclined obliquely outward from the convex portion 115a. The leading end portion 115c is formed. In this case, the interval between the convex portions 115 a in the claw portions 115 formed on the opposite sides of the lid portion 111 is formed slightly narrower than the width of the main body portion 110. And since the front-end | tip part 115c is formed in the taper shape so that it may go diagonally outside, when the cover part 111 is fitted by the main-body part 110, the space | interval between the convex parts 115a is slightly larger than the width | variety of the main-body part 110. Even if it is narrowly formed, the lid 111 can be easily fitted onto the main body 110 by being guided by the tapered tip 115c. Further, a large number of elongated rectangular engagement holes 110a are formed in the upper portions of the four side plates 110b of the main body 110 corresponding to the positions where the claw portions 115 are arranged, and the lid 111 is fitted on the main body 110. In this case, as shown in FIG. 13, the convex portions 115a of the respective claw portions 115 are elastically engaged with the corresponding engagement holes 110a. Thereby, the cover part 111 comes to be fixed to the main-body part 110 elastically and reliably.

  As shown in FIG. 15, the main body 110 has a rectangular parallelepiped shape including four side plates 110b, and a plurality of elongated rectangular engagement holes 110a corresponding to the positions of the claw portions 115 are formed on the upper portions of the four side plates 110b. Has been. The upper ends of the four side plates 110b are bent inward, and four coaxial plugs 112 are fixed to one of the side plates 110b. In addition, for example, three partition plates 114 are provided in the main body 110 at a predetermined interval in the horizontal direction, and the internal storage space is partitioned into four. In each of the four storage spaces, a circuit board 113 in which an RF circuit and the like are assembled is stored. In this case, the circuit board 113 is provided with a semi-fixed adjustment element such as a trimmer or volume for adjusting electrical characteristics of an RF circuit or the like, and the adjustment element is provided with an adjustment knob 113a. Further, a plurality of projecting portions 114 a each having a constriction formed at the base projecting from the upper end of the partition plate 114 are provided.

Further, as shown in FIG. 14, a large number of claw portions 115 are formed on each of the four sides of the lid portion 111 by being bent substantially perpendicularly downward on the sides. And the convex part 115a which protrudes inside is formed in the slightly lower side from the center of the nail | claw part 115, and the taper-shaped front-end | tip part 115c which goes diagonally outward from the convex part 115a is formed. In addition, a plurality of round holes 111 c and a plurality of slits 111 b are formed in the planar portion of the lid portion 111. When the lid portion 111 is fitted on the main body portion 110, the adjustment knob 113a of the adjustment element provided on the circuit board 113 is inserted into the round hole 111c so as to slightly protrude, and the upper end of the partition plate 114 is The formed protrusion 114a protrudes through the slit 111b.
Here, FIG. 16 shows a state in which the lid portion 111 is fitted to the main body portion 110. In this state, the plurality of protruding portions 114a protruding from the slits 111b are twisted to obtain an attachment state shown in FIG. Thus, the planar portion of the lid 111 is attached in close contact with the upper surface of the main body 110.

Next, a configuration example of a shield case 200 for another conventional electronic device is shown in FIGS. FIG. 17 is a perspective view showing a configuration of another conventional shield case 200, and FIG. 18 is a perspective view showing an enlarged partial configuration of another conventional shield case 200 in a sectional view.
A shield case 200 for another conventional electronic device shown in these drawings includes a rectangular parallelepiped main body 210 and a lid 211 that is fitted so as to close the open upper surface of the main body 210. Has been. The main body portion 210 and the lid portion 211 are formed by processing a metal plate, and a circuit board in which an RF circuit or the like is assembled is housed in the internal housing space. The configuration of the lid portion 211 is the same as the configuration of the lid portion 111 in the conventional shield case 100. The configuration of the main body 210 is different from the configuration of the main body 110 in the conventional shield case 100, except that the four side plates 210b are not provided with engagement holes, but the other configurations are the same.
That is, when the lid 211 is fitted on the main body 210, the lid 211 can be easily fitted on the main body 210 by being guided by the tapered tip 215 c. Further, the interval between the convex portions 215a in the claw portions 215 formed on the opposite sides of the lid portion 211 is formed slightly narrower than the width of the main body portion 210, and when the lid portion 211 is fitted to the main body portion 210, The lid 211 is elastically fixed to the main body 210.

Next, FIG. 19 and FIG. 20 show a configuration example of a conventional shield case 300 for still another electronic device. FIG. 19 is a perspective view showing a configuration of still another conventional shield case 300, and FIG. 20 is an enlarged perspective view showing a partial configuration of still another conventional shield case 300 in a sectional view.
The shield case 300 for still another conventional electronic device shown in these drawings includes a rectangular parallelepiped main body part 310 and a cover part 311 that is fitted to close the upper surface of the main body part 310 that is opened. It is configured. The main body portion 310 and the lid portion 311 are made by processing a metal plate, and a circuit board in which an RF circuit or the like is assembled is housed in the internal housing space. The configuration of the lid 311 is the same as the configuration of the lid 111 in the conventional shield case 100. In addition, the configuration of the main body 310 is different from the configuration of the main body 110 in the conventional shield case 100, although the configuration in which the protrusions 310a are provided in place of the engagement holes in the four side plates 310b is different. The configuration is the same.
That is, on the upper outer surface of the four side plates 310b in the main body portion 310, projecting portions 310a extending to the filaments are formed in the lateral direction over the entire side plate 310b. Then, when the lid portion 311 is fitted on the main body portion 310, as shown in FIG. 20, the convex portions 315a of the respective claw portions 315 get over the protruding portions 310a and are elastically pressed against the side plates 310b. Become. In this case, since the convex portion 315a of the claw portion 315 is engaged with the protruding portion 310a, the lid portion 311 is fixed to the main body portion 310 elastically and reliably. When the lid 311 is fitted on the main body 310, the convex portion 315a of the claw portion 315 is easily guided over the projecting portion 310a by being guided by the tapered tip portion 315c.

JP 2009-182058 A JP 2009-141245 A

In the conventional shield case, since the claw part of the lid part is configured to be pressed against the outer surface of the side plate in the main body part, the outer dimensions of the shield case are larger than the width of the main body part, thereby reducing the size. There was a problem that could not.
Further, since the electrical contact between the lid portion and the main body portion is mainly performed by the convex portion of the claw portion, the electrical contact may not be ensured.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a shield case that has a structure that can be reduced in size and that can ensure electrical contact.

  The shield case of the present invention has a box shape with at least an upper surface opened, and a conductive case main body portion in which a circuit board is accommodated, and the upper surface of the case main body portion is closed. A conductive lid that is fitted on the upper surface of the case main body, and the upper end of the side plate in the case main body is bent inward, and a plurality of introduction holes are formed at corners of the upper end of the side plate at predetermined intervals. A plurality of engagement holes formed at the predetermined intervals at positions corresponding to the respective introduction holes, and provided on each side of the lid portion. The claw portions are formed at the predetermined intervals at the positions of the sides of the lid portion respectively corresponding to the positions of the introduction holes, and the claw portions are formed to be bent downward substantially at a right angle. In addition, each nail portion is formed with a convex portion that bulges outward. When the lid portion is fitted on the case body portion, the plurality of claw portions are introduced into the introduction holes formed in the side plates, and the protrusions in the claw portions are The main feature is that the portion engages with each of the engagement holes inside the side plate.

  According to the present invention, when the lid portion is fitted on the case main body portion, the plurality of claw portions formed on each side of the lid portion are formed at the corners on the upper end of the side plate in the case main body portion. The convex portions that are introduced into the introduction holes and bulge outwardly formed on the respective claw portions are arranged on the inner side of the side plate in each of the plurality of engagement holes formed on the side plate corresponding to the introduction holes. To be engaged. Thereby, the outer dimension of the shield case becomes the same as the width of the case body, and the shield case can be miniaturized. Moreover, since each nail | claw part is introduce | transduced into an introduction hole, and also engages with an engagement hole, while a nail | claw part can contact a case main-body part in several places and it can ensure electrical contact, a cover part The mechanical strength attached to the case body can be improved.

It is a perspective view which shows the structure of the shield case concerning 1st Example of this invention. It is a perspective view which expands and shows a part of structure of the shield case concerning 1st Example of this invention with sectional drawing. It is a perspective view which shows the structure of the cover part of the shield case concerning this invention. It is a perspective view which shows the structure of the case main-body part of the shield case concerning this invention. It is a perspective view which shows the structure in the middle of the assembly of the shield case concerning 1st Example of this invention. It is a perspective view which shows the structure of the shield case concerning 2nd Example of this invention. It is a perspective view which expands and shows a part of structure of the shield case concerning 2nd Example of this invention by sectional drawing. It is a perspective view which shows the structure of the shield case concerning 3rd Example of this invention. It is a perspective view which expands and shows a part of structure of the shield case concerning 3rd Example of this invention with sectional drawing. It is a perspective view which shows the structure of the shield case concerning 4th Example of this invention. It is a perspective view which expands and shows a part of structure of the shield case concerning 4th Example of this invention by sectional drawing. It is a perspective view which shows the structure of the conventional shield case. It is a perspective view which expands and shows a part of structure of the conventional shield case by sectional drawing. It is a perspective view which shows the structure of the cover part of the conventional shield case. It is a perspective view which shows the structure of the case main-body part of the conventional shield case. It is a perspective view which shows the structure in the middle of the assembly of the conventional shield case. It is a perspective view which shows the structure of the other conventional shield case. It is a perspective view which expands and shows a part of structure of the other conventional shield case by sectional drawing. It is a perspective view which shows the structure of the other conventional shield case. It is a perspective view which expands and shows a part of structure of the further other conventional shield case by sectional drawing.

  The structure of the shield case 1 of the first embodiment of the present invention is shown in FIGS. FIG. 1 is a perspective view showing a configuration of a shield case 1 according to a first embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a part of the configuration of the shield case 1 according to the first embodiment of the present invention. FIG. 3 is a perspective view showing the configuration of the lid portion of the shield case 1 according to the first embodiment of the present invention. FIG. 4 is a perspective view of the shield case 1 according to the first embodiment of the present invention. FIG. 5 is a perspective view showing the configuration of the case main body, and FIG. 5 is a perspective view showing the configuration during the assembly of the shield case 1 according to the first embodiment of the present invention.

  As shown in FIG. 1, the shield case 1 according to the first embodiment of the present invention shown in these drawings includes a box-shaped case main body portion 10 having a rectangular parallelepiped shape whose upper surface is open, and an opening of the case main body portion 10. It is comprised from the rectangular-shaped cover part 11 fitted so that the upper surface currently covered may be obstruct | occluded. The case body 10 and the lid 11 are made by processing a metal plate to be conductive, and a circuit board in which a high frequency (RF) circuit or the like is assembled is accommodated in an internal storage space. Four coaxial plugs 12 are provided on one side surface of the case body 10, and an RF signal input from the coaxial plug 12 is input to an internal circuit board or an RF signal output from the internal circuit board. A signal can be output via the coaxial plug 12. Each of the four sides of the rectangular lid portion 11 is provided with a large number of claw portions 15 formed at predetermined intervals, and the claw portions 15 are substantially perpendicular to the lower side at the side of the planar portion of the lid portion 11. It is bent and formed. When a large number of claw portions 15 formed on the four sides of the lid portion 11 are fitted onto the case main body portion 10, the introduction holes 10c formed in the side plate 10b of the case main body portion 10 to be described later. The lid portion 11 is attached to the case body portion 10 by being introduced into the inside and being engaged with an engagement hole 10a formed in the upper portion of the side plate 10b.

As shown in the enlarged view of FIG. 2, the claw portion 15 is formed with a convex portion 15 a that bulges outward slightly from the center, and is formed in a tapered shape so as to obliquely inward from the convex portion 15 a. A tip portion 15c is formed. Further, the interval between the convex portions 15a of the claw portions 15 formed on the opposing sides of the lid portion 11 is formed slightly wider than the inner dimension of the case main body portion 10 (the interval between the inner surfaces of the opposing side plates 10b). Has been.
As shown in the enlarged view of FIG. 2, the case main body 10 includes a side plate 10 b and a metal (conductive) bottom plate 10 d that closes the lower surface. Four side plates 10b are arranged on the front, rear, left and right sides to form a box. The upper end of each side plate 10b is bent inward at a substantially right angle, and has a rectangular shape elongated in the horizontal direction at a predetermined interval equal to the predetermined interval at which the claw portion 15 is provided at the corner of the upper end of the bent side plate 10b. A plurality of introduction holes 10c are formed. Further, a plurality of rectangular engagement holes 10a elongated in the lateral direction are formed at the upper portions of the side plates 10b at the predetermined intervals so as to be formed at positions corresponding to the plurality of introduction holes 10c. And since the front-end | tip part 15c is formed in the taper shape so that it may go diagonally inside when the cover part 11 is fitted to the case main-body part 10, the space | interval between the convex parts 15a in the nail | claw part 15 which faces is formed. Even if the inner shape of the case main body 10 is formed to be slightly wider than the space between the facing introduction holes 10c, the claw 15 is guided and introduced into the introduction hole 10c by the tapered tip 15c. It becomes like this. Each claw portion 15 introduced into the introduction hole 10c is elastically engaged with the projection 15a in the engagement hole 10a formed corresponding to the lower portion of the introduction hole 10c. In this way, the lid 11 can be easily and elastically and reliably attached to the case main body 10. The shield case 1 of the first embodiment has the same outer dimensions as the width of the case body 10, and the shield case 1 can be miniaturized. In addition, each claw portion 15 can contact the periphery of the introduction hole 10c and the engagement hole 10a at a plurality of locations to ensure electrical contact, and can improve the mechanical strength to be attached.

  The details of the configuration of the case body 10 are shown in FIG. 4, and as shown in this figure, the case body 10 has a box shape composed of four side plates 10b. A plurality of elongated rectangular engagement holes 10 a are formed at predetermined intervals that are the same as the predetermined intervals of the claw portions 15 corresponding to the arrangement positions of the claw portions 15. Further, the upper ends of the four side plates 10b are bent inward, and a plurality of introduction holes 10c are formed at the corners of the upper ends of the bent side plates 10b at the predetermined intervals. Four coaxial plugs 12 are fixed to one side plate 10b. Further, a partition plate 14 made of, for example, three metal plates is provided in the main body 10 at a predetermined interval in the lateral direction, and the internal storage space is partitioned into four. In each of the storage spaces divided into four, circuit boards 13 assembled with RF circuits and the like are respectively stored. In this case, the circuit board 13 is provided with a semi-fixed adjustment element such as a trimmer or volume for adjusting the electrical characteristics of the RF circuit, etc., and the adjustment element is provided with an extended adjustment knob 13a. ing. Further, a plurality of projecting portions 14 a each having a constricted portion formed at the base projecting from the upper end of the partition plate 14 are provided.

  Further, the details of the configuration of the lid portion 11 are shown in FIG. 3, and as shown in FIG. 3, the lid portion 11 has a planar portion that is a rectangle that closes the upper surface of the case body portion 10, and a planar shape. It consists of a number of claw portions 15 formed on each of the four sides of the part. The claw portion 15 is formed to be bent substantially at a right angle downward, and a convex portion 15a bulging outward is formed slightly below the center of the claw portion 15, and obliquely inward from the convex portion 15a. A tapered distal end portion 15c is formed. A plurality of round holes 11 c and a plurality of slits 11 b are formed in the planar portion of the lid portion 11. When the lid portion 11 is fitted on the case body portion 10, the tip of the adjustment knob 13a of the adjustment element provided on the circuit board 13 passes through the round hole 11c and slightly protrudes, so that the partition plate 14 A plurality of protrusions 14a formed at the upper end of the protrusion 11b protrude through the slits 11b.

Here, FIG. 5 shows a state in which the lid portion 11 is fitted to the case main body portion 10. In this state, a large number of claw portions 15 are elastically engaged with the engagement holes 10a inside the side plate 10b of the case main body portion 10. Therefore, the claw part 15 applies a stress that lifts the planar part of the lid part 11 upward. Therefore, by twisting each of the plurality of projecting portions 14a projecting from the respective slits 11b, the constricted portion of the projecting portion 14a is twisted into the attachment state shown in FIG. 1, and the planar portion of the lid portion 11 is not lifted. It comes in close contact with the upper surface of the case body 10.
In the shield case 1 of the first embodiment of the present invention, the adjustment knob 13a protruding from the shield case 1 is rotated and adjusted in a state in which power is supplied to the circuit board 13 housed therein and the circuit board 13 is in an operating state. By doing so, it can be adjusted so as to have desired electrical characteristics.

Next, the configuration of the shield case 2 of the second embodiment of the present invention is shown in FIGS. FIG. 6 is a perspective view showing the configuration of the shield case 2 according to the second embodiment of the present invention, and FIG. 7 is an enlarged sectional view of a part of the configuration of the shield case 2 according to the second embodiment of the present invention. It is a perspective view shown by.
The shield case 2 according to the second embodiment of the present invention shown in these drawings is similar to the shield case 1 of the first embodiment in that a box-like case body 20 having a rectangular parallelepiped shape with an open top surface, and a case It is comprised from the rectangular-shaped cover part 21 fitted so that the upper surface by which the main-body part 20 was opened may be obstruct | occluded. The case body 20 and the lid 21 are made by processing a metal plate to be conductive, and a circuit board in which a high frequency (RF) circuit or the like is assembled is accommodated in an internal storage space. Four coaxial plugs 22 are provided on one side surface of the case main body 20, and an RF signal input from the coaxial plug 22 is input to an internal circuit board or an RF signal output from the internal circuit board. A signal can be output via the coaxial plug 22.

The configuration of the lid portion 21 is the same as the configuration of the lid portion 11 according to the first embodiment, and a detailed description thereof is omitted, but a number of claw portions 25 formed at predetermined intervals are 4 of the lid portion 21. The claw portion 25 is formed on the side and is bent substantially perpendicularly downward. As shown in the enlarged view of FIG. 7, the claw portion 25 is formed with a convex portion 25a that bulges outward slightly from the center, and is formed in a tapered shape so as to obliquely inward from the convex portion 25a. A tip portion 25c is formed. Further, the interval between the convex portions 25a in the claw portion 25 formed on the opposite sides of the lid portion 21 is formed slightly wider than the inner dimension of the case main body portion 20 (the interval between the inner surfaces between the opposing side plates 20b). Has been.
As shown in the enlarged view of FIG. 7, the case body 20 includes a side plate 20 b and a metal (conductive) bottom plate 20 d that closes the lower surface. Four side plates 20b are arranged on the front, rear, left and right sides so as to form a box. The upper ends of the side plates 20b are bent inward at a substantially right angle, and a plurality of rectangular shapes having an elongated width capable of introducing two claw portions 25 adjacent to the corners of the upper ends of the bent side plates 20b. The introduction holes 20c are formed at a predetermined interval. Further, a plurality of rectangular engaging holes 20a having the same elongated width as the introduction holes 20c are formed in the upper portions of the side plates 20b at positions corresponding to the introduction holes 20c at the predetermined intervals. Since the other structure of the case main body 20 is the same as that of the case main body 10 according to the first embodiment, a description thereof will be omitted.

  And since the front-end | tip part 25c is formed in the taper shape so that it may go diagonally inside when the cover part 21 is fitted to the case main-body part 20, the space | interval between the convex parts 25a in the nail | claw part 25 which faces is formed. Even if the inner shape of the case main body 20 is formed to be slightly wider than the distance between the introduction holes 20c facing each other, the claw 25 is guided into the introduction hole 20c by the tapered tip 25c. . In this case, two adjacent claw portions 25 are guided and introduced into one introduction hole 20c, and are introduced two by two into the engagement holes 20a formed correspondingly below the introduction hole 20c. The convex portion 25a of the claw portion 25 comes to be elastically engaged inside the side plate 20b. In this way, the lid 21 can be easily and elastically and reliably attached to the case main body 20. Further, when the lid 21 is fitted on the case main body 20, the tip of the adjustment knob 23a of the adjustment element on the circuit board housed in the case main body 20 passes through the round hole 21c and slightly protrudes. Thus, a plurality of projecting portions 24a having a constricted portion formed at the base projecting from the upper end of the partition plate in the case body portion 20 project through each of the slits 21b. By twisting each of the plurality of projecting portions 24a projecting from the respective slits 21b, the constricted portion of the projecting portion 24a is twisted, and the planar portion of the lid portion 21 is attached in close contact with the upper surface of the case main body portion 20 without being lifted. Be able to.

Also in the shield case 2 of the second embodiment, the outer dimensions are the same as the width of the case body 20, and the shield case 2 can be downsized. Moreover, each claw part 25 can contact the circumference | surroundings of the introduction hole 20c and the engagement hole 20a in several places, can ensure electrical contact, and can improve the mechanical strength attached.
Also in the shield case 2 of the second embodiment of the present invention, the adjustment knob 23a protruding from the shield case 2 is rotated and adjusted in a state in which power is supplied to the circuit board housed therein and the circuit board is in an operating state. Therefore, it can be adjusted so as to obtain desired electrical characteristics.

Next, the configuration of the shield case 3 of the third embodiment of the present invention is shown in FIGS. FIG. 8 is a perspective view showing the configuration of the shield case 3 according to the third embodiment of the present invention, and FIG. 9 is an enlarged sectional view of a part of the configuration of the shield case 3 according to the third embodiment of the present invention. It is a perspective view shown by.
The shield case 3 according to the third embodiment of the present invention shown in these drawings is similar to the shield case 1 of the first embodiment in that a box-like case main body 30 having a rectangular parallelepiped shape whose upper surface is opened, and a case It is comprised from the rectangular-shaped cover part 31 fitted so that the upper surface by which the main-body part 30 was opened may be obstruct | occluded. The case main body 30 and the lid 31 are made by processing a metal plate to be conductive, and a circuit board in which a high frequency (RF) circuit or the like is assembled is stored in an internal storage space. Four coaxial plugs 32 are provided on one side surface of the case main body 30, and an RF signal input from the coaxial plug 32 is input to an internal circuit board or an RF signal output from the internal circuit board. A signal can be output via the coaxial plug 32.

The configuration of the lid portion 31 is the same as that of the lid portion 11 according to the first embodiment, and a detailed description thereof is omitted, but a number of claw portions 35 formed at a predetermined interval are four of the lid portion 31. The claw portion 35 is provided at the side and bent downward at a substantially right angle. As shown in the enlarged view of FIG. 9, the claw portion 35 is formed with a convex portion 35a that bulges outward slightly from the center, and is formed in a tapered shape so as to obliquely inward from the convex portion 35a. A tip portion 35c is formed. Further, the interval between the convex portions 35a of the claw portion 35 formed on the opposing sides of the lid portion 31 is formed slightly wider than the inner dimension of the case main body portion 30 (the interval between the inner surfaces of the opposing side plates 30b). Has been.
As shown in the enlarged view of FIG. 9, the case main body 30 includes a side plate 30b and a metal (conductive) bottom plate 30d that closes the lower surface. Four side plates 30b are arranged on the front, rear, left and right sides to form a box. The upper ends of the side plates 30b are bent inward at a substantially right angle, and a plurality of rectangular introduction holes 30c having a narrow width capable of introducing the claw portions 35 into the corners of the upper ends of the bent side plates 30b. Are formed at the same predetermined intervals as the claw portions 35. Since the other structure of the case main body 30 is the same as that of the case main body 10 according to the first embodiment, a description thereof will be omitted.

  And since the front-end | tip part 35c is formed in the taper shape so that it may go diagonally inside when the cover part 31 is fitted to the case main-body part 30, the space | interval between the convex parts 35a in the nail | claw part 35 which faces is formed. Even if the inner shape of the case main body 30 is formed to be slightly wider than the distance between the introduction holes 30c facing each other, the claw 35 is guided into the introduction hole 30c by the tapered tip 35c. . In this case, one claw portion 35 is guided and introduced into each introduction hole 30c, and the convex portion 35a of each claw portion 35 introduced into the introduction hole 30c is elastically pressed against the inner surface of the side plate 30b. To come. In this way, the lid 31 can be easily and elastically and reliably attached to the case main body 30. Further, when the lid portion 31 is fitted on the case main body 30, the tip of the adjustment knob 33a of the adjustment element on the circuit board housed in the case main body 30 slightly penetrates the round hole 31c. As a result, a plurality of projecting portions 34a having a constricted portion formed at the base projecting from the upper end of the partition plate in the case main body 30 project through each of the slits 31b. By twisting the plurality of projecting portions 34a projecting from the respective slits 31b, the constricted portion of the projecting portion 34a is twisted so that the planar portion of the lid portion 31 is brought into close contact with the upper surface of the case main body portion 30 without being lifted. It can be attached.

Also in the shield case 3 of the third embodiment, the outer dimensions are the same as the width of the case main body 30, and the shield case 3 can be downsized. In addition, each claw portion 35 can contact the periphery of the introduction hole 30c and the engagement hole 30a at a plurality of locations to ensure electrical contact, and can improve the mechanical strength to be attached.
Also in the shield case 2 of the third embodiment of the present invention, the adjustment knob 33a protruding from the shield case 3 is rotated and adjusted in a state in which power is supplied to the circuit board housed therein and the circuit board is in an operating state. Therefore, it can be adjusted so as to obtain desired electrical characteristics.

Next, the structure of the shield case 4 of the fourth embodiment of the present invention is shown in FIGS. FIG. 10 is a perspective view showing the configuration of the shield case 4 according to the fourth embodiment of the present invention, and FIG. 11 is an enlarged sectional view of a part of the configuration of the shield case 4 according to the fourth embodiment of the present invention. It is a perspective view shown by.
The shield case 4 according to the fourth embodiment of the present invention shown in these drawings is similar to the shield case 1 of the first embodiment in that a box-shaped case main body 40 having a rectangular parallelepiped shape with an open upper surface, and a case It is comprised from the rectangular-shaped cover part 41 fitted so that the upper surface by which the main-body part 40 was opened may be obstruct | occluded. The case main body 40 and the lid 41 are made by processing a metal plate to be conductive, and a circuit board on which a high frequency (RF) circuit or the like is assembled is stored in an internal storage space. Four coaxial plugs 42 are provided on one side surface of the case main body 40, and an RF signal input from the coaxial plug 42 is input to an internal circuit board or an RF signal output from the internal circuit board. A signal can be output via the coaxial plug 42.

The configuration of the lid portion 41 is the same as the configuration of the lid portion 11 according to the first embodiment, and a detailed description thereof is omitted, but a number of claw portions 45 formed at a predetermined interval are four of the lid portion 41. The claw portion 45 is formed on the side and is bent at a substantially right angle downward. As shown in the enlarged view of FIG. 11, the claw portion 45 is formed with a convex portion 45 a that bulges outward slightly from the center, and is formed in a tapered shape so as to obliquely inward from the convex portion 45 a. A tip 45c is formed. Further, the interval between the convex portions 45a of the claw portions 45 formed on the opposing sides of the lid portion 41 is formed slightly wider than the inner dimension of the case main body portion 40 (the interval between the inner surfaces of the opposing side plates 40b). Has been.
As shown in the enlarged view of FIG. 11, the case main body 40 includes a side plate 40b and a metal (conductive) bottom plate 40d that closes the lower surface. Four side plates 40b are arranged on the front, rear, left and right sides to form a box. The upper ends of the side plates 40b are bent inward at a substantially right angle, and a plurality of rectangular introduction holes 40c having an elongated width capable of introducing the claw portions 45 into the corners of the upper ends of the bent side plates 40b. Are formed at the same predetermined intervals as the claw portions 45. Further, below the introduction holes 40c formed in each side plate 40b, an inward projecting portion 40e that bulges into a line on the inner side of the side plate 40b is formed over substantially the lateral width of the side plate 40b. Since the other structure of the case main body 40 is the same as that of the case main body 10 according to the first embodiment, a description thereof will be omitted.

  And since the front-end | tip part 45c is formed in the taper shape so that it may go diagonally inside, when the cover part 41 is fitted to the case main-body part 40, the space | interval between the convex parts 45a in the nail | claw part 45 which faces is formed. Even if the inner shape of the case main body 40 is formed to be slightly wider than the distance between the introduction holes 40c facing each other, the claw portion 45 is guided into the introduction hole 40c by the tapered tip 45c. . In this case, one claw portion 45 is guided and introduced into each introduction hole 40c, and the convex portion 45a of each claw portion 45 introduced into the introduction hole 40c bulges from the inner surface of the side plate 40b. Overcoming the formed inward protruding portion 40e, the elastic protrusion engages with the inward protruding portion 40e. In this way, the lid portion 41 can be easily and elastically and reliably attached to the case main body portion 40. In addition, the length of the inward protruding part 40e should just be more than the length between the both ends of the some nail | claw part 45 currently formed in the one side of the cover part 41. FIG. Further, when the lid portion 41 is fitted on the case body portion 30, the tip of the adjustment knob 43a of the adjustment element on the circuit board housed in the case body portion 40 slightly protrudes through the round hole 41c. Thus, a plurality of projecting portions 44a each having a constricted portion formed at the base projecting from the upper end of the partition plate in the case main body portion 40 project through each of the slits 41b. By twisting the plurality of projecting portions 44a projecting from the respective slits 41b, the constricted portion of the projecting portion 44a is twisted, and the planar portion of the lid portion 41 is closely attached to the upper surface of the case main body portion 40 and attached. Be able to.

Also in the shield case 4 of the fourth embodiment, the outer dimensions are the same as the width of the case main body 40, and the shield case 4 can be miniaturized. In addition, each claw portion 45 can contact the periphery of the introduction hole 40c and the engagement hole 40a at a plurality of locations to ensure electrical contact and improve the mechanical strength to be attached.
Also in the shield case 4 of the fourth embodiment of the present invention, the adjustment knob 43a protruding from the shield case 4 is rotated and adjusted in a state in which power is supplied to the circuit board housed therein and the circuit board is in an operating state. Therefore, it can be adjusted so as to obtain desired electrical characteristics.

In the shield case of each embodiment according to the present invention described above, the claw portion is pressed against the inside of the case main body portion, so that the tension of the claw portion formed on the lid portion is applied in the inner direction of the lid portion. Comes to float. Then, by twisting the projecting portion formed at the base projecting upward from the lid portion, the lid portion is fixed to the case main body portion, so that the lifting of the lid portion is suppressed and the claw portion is suppressed. As a result, a stronger tension is applied, and the electrical contact between the lid and the case body can be strengthened. Therefore, radio wave interference and leakage can be prevented as much as possible, and the performance is improved.
Further, since the outer dimension of the shield case according to the present invention is reduced, the outer dimension of the product using the shield case can be reduced, the space for installation can be saved, and the material can be reduced. .
Furthermore, in the shield case 4 according to the fourth embodiment, the inward projecting portion 40e is formed over substantially the lateral width of the side plate 40b, but instead, only at positions corresponding to the claw portions 45, respectively. The inner ridges 40e may be provided at the same predetermined intervals as the claw portions 45. Even if it does in this way, when the cover part 41 is fitted to the case main body part 40, the convex part 45a of each nail | claw part 45 introduce | transduced in the introduction hole 40c is formed so that it may bulge from the inner surface of the side plate 40b. The inner projecting portion 40e is overcome and elastically engaged with the inner projecting portion 40e.

1 to 4 shield case, 10 case main body, 10 main body, 10a engagement hole, 10b side plate, 10c introduction hole, 10d bottom plate, 11 lid, 11b slit, 11c round hole, 12 coaxial plug, 13 circuit board, 13a Adjustment knob, 14 Partition plate, 14a Projection, 15 Claw, 15a Projection, 15c Tip, 20 Case body, 20a Engagement hole, 20b Side plate, 20c Introduction hole, 20d Bottom plate, 21 Lid, 21b Slit, 21c Round hole, 22 Coaxial plug, 23a Adjustment knob, 24a Protruding part, 25 Claw part, 25a Convex part, 25c Tip part, 30 Case body part, 30a Engagement hole, 30b Side plate, 30c Introduction hole, 30d Bottom plate, 31 Lid, 31b Slit, 31c Round hole, 32 Coaxial plug, 33a Adjusting knob, 34a Projection, 35 Each claw, 35 claw portion, 35a convex portion, 35c tip portion, 40 case body portion, 40a engagement hole, 40b side plate, 40c introduction hole, 40d bottom plate, 40e inward protruding portion, 41 lid portion, 41b slit, 41c round hole, 42 Coaxial plug, 43a Adjustment knob, 44a Projection, 45 Claw, 45a Projection, 45c Tip, 100 Shield case, 110 Main body, 110a Engagement hole, 110b Side plate, 111 Lid, 111b Slit, 111c Round hole, 112 Coaxial plug, 113 Circuit board, 113a Adjustment knob, 114 Partition plate, 114a Protruding part, 115 Claw part, 115a Convex part, 115c Tip part, 200 Shield case, 210 Body part, 210b Side plate, 211 Lid Part, 215 claw part, 215a convex part, 215c tip part, 300 shield case, 310 Body part, 310a Protruding part, 310b Side plate, 311 Lid part, 315 Claw part, 315a Convex part, 315c Tip part

Claims (6)

It is a box shape having at least an upper surface opened, and a conductive case main body portion in which a circuit board is housed.
A conductive lid fitted on the upper surface of the case main body so as to close the opening on the upper surface of the case main body;
The upper end of the side plate in the case main body is bent inward, and a plurality of introduction holes are formed at predetermined intervals in the corner of the upper end of the side plate, and the positions corresponding to the introduction holes, respectively. A plurality of engagement holes are formed in the upper part of the side plate at the predetermined interval,
The plurality of claw portions provided on each side of the lid portion are formed at the predetermined intervals at the positions of the sides of the lid portion corresponding to the positions of the introduction holes, respectively. And each nail portion is formed with a convex portion that bulges outward,
When the lid portion is fitted to the case body portion, the plurality of claw portions are introduced into the introduction holes formed in the side plates, and the convex portions in the claw portions are A shield case that engages with each of the engagement holes on the inner side of the side plate. It is a box shape having at least an upper surface opened, and a conductive case main body portion in which a circuit board is housed.
A conductive lid fitted on the upper surface of the case main body so as to close the opening on the upper surface of the case main body;
The upper end of the side plate in the case main body is bent inward, and a plurality of introduction holes are formed at predetermined intervals in the corner of the upper end of the side plate, and the positions corresponding to the introduction holes, respectively. A plurality of engagement holes are formed in the upper part of the side plate at the predetermined interval,
A plurality of claw portions provided on each side of the lid portion are formed at predetermined intervals on each side of the lid portion so as to correspond to one of the introduction holes, and the claw portions are substantially perpendicular to each other. And each nail portion is formed with a convex portion that bulges outward,
When the lid is fitted on the case body, the plurality of claw portions are introduced into the introduction holes formed in the side plate, and the convex portions of the plurality of introduced claw portions are The shield case engages with the engagement hole inside the side plate corresponding to the introduction hole. It is a box shape having at least an upper surface opened, and a conductive case main body portion in which a circuit board is housed.
A conductive lid fitted on the upper surface of the case main body so as to close the opening on the upper surface of the case main body;
The upper end of the side plate in the case body is bent inward, and a plurality of introduction holes are formed at predetermined intervals in the corner of the upper end of the side plate,
The plurality of claw portions provided on each side of the lid portion are formed at the predetermined intervals at the positions of the sides of the lid portion corresponding to the positions of the introduction holes, respectively. And each nail portion is formed with a convex portion that bulges outward,
When the lid portion is fitted to the case body portion, the plurality of claw portions are introduced into the introduction holes formed in the side plates, and the convex portions in the claw portions are A shield case, wherein the shield case is pressed against the inner surface of the side plate. It is a box shape having at least an upper surface opened, and a conductive case main body portion in which a circuit board is housed.
A conductive lid fitted on the upper surface of the case main body so as to close the opening on the upper surface of the case main body;
The upper end of the side plate in the case main body is bent inward, and a plurality of introduction holes are formed at predetermined intervals at the corner of the upper end of the side plate, and the upper inner surface of the side plate is below the introduction hole. An inward projection that bulges from is formed,
The plurality of claw portions provided on each side of the lid portion are formed at the predetermined intervals at the positions of the sides of the lid portion corresponding to the positions of the introduction holes, respectively. And each nail portion is formed with a convex portion that bulges outward,
When the lid portion is fitted on the case main body portion, the plurality of claw portions are introduced into the introduction holes formed in the side plate, and the convex portions in the claw portions are A shield case, wherein the shield case overlies the inward protruding portion on the inner side of the side plate and engages with the inward protruding portion.   The shield case according to any one of claims 1 to 4, wherein a tip of the claw portion is formed in a tapered shape obliquely inward.   A partition plate that divides the storage space of the case main body into a plurality of parts is provided in the case main body, and is formed so as to protrude from the upper end of the partition plate when the lid is fitted to the case main body. 5. The protruding portion protrudes through a slit formed in the lid portion, and the lid portion is fixed to the case main body portion by twisting the protruding protruding portion. A shield case according to any one of the above.

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