JP2003309380A - Fastening structure for cover in electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively mount/demount a cover 20 mounted via coupling means 30 on a case 1 of an electronic equipment into/from an inspection screw hole 14 of the case 1 of the electronic equipment used outdoors, at low cost having weatherability, but without entanglement of a circuit board 9 with a circuit element 9a or twisting of the circuit board 9. <P>SOLUTION: In a structure for fastening a cover 20 mounted in a screw hole 14 with a fastening tool engaged with a case 1 via coupling means 30, one end of the coupling means 30 is engaged with stopper means 15 in the case 1, with the other end of the coupling means 30 mounted rotatably on a screw top of the cover 20. The coupling means 30 is configured into a plate form freely bendable, and the cover 20 is fastened to the screw hole 14. The configuration of the coupling means 30 when it is accommodated in the case 1 is kept substantially unchanged, while the screw hole 14 is turned. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an amplifier circuit,
The present invention relates to a structure in a case of an electronic device that accommodates various high-frequency circuits such as a converter circuit, in which a lid provided with a male screw that can be screwed into a screw hole provided in the case is fixed to the case.

[0002]

2. Description of the Related Art In this type of electronic device, the operating state may be checked or various adjustments may be made in the operating state. Therefore, the circuit board in the case is provided with, for example, a monitor terminal and a gain adjusting volume, and a screw hole is provided at a case portion facing these parts, and the screw hole is used to measure the level. Or adjusting the gain. A lid is detachably attached to the screw hole. For example, a string made of a synthetic resin material or a well-known ball chain is used to prevent the lid from being removed when the lid is removed from the case. It is tied to the case. FIG. 12 shows, as a connecting means for connecting the lid 20, a string 51 made of a synthetic resin material. In this embodiment, a stopper 55 having one end of the cord body locked by a set screw is fixed to the inside of the case 1 of the electronic device, and a spherical retaining bead 52 is formed on the other end of the cord body 51. The retaining bead 52 is fitted into a recess 54 provided at the screw tip of the lid 20, and then the peripheral edge of the recess 54 is caulked, and the caulking portion 53 prevents the bead from coming off. The lid body 20 and the cord body 51 are relatively rotatable, so that the lid body 20 is removable. (For example,
(Refer to JP-B-62-42551)

Next, as shown in FIG. 13, there is a method of using a ball chain 61 as a connecting means of the case 1 and the lid 20. In this embodiment, a stopper 62 provided at one end of the ball chain 61 is fixed to the side wall of the case 1 of the electronic device with a set screw, and a connecting piece 63 is provided at the other end of the ball chain 61. An attachment 64 is connected to the piece 63, and a coil portion 65 is formed at a free end portion of the attachment 64. The coil portion 65 is provided with an annular groove 66 in the lid 20.
The lid 20 is detachable by being loosely fitted in. (See, for example, JP-A-11-29169)

[0004]

The method of using a cord made of a synthetic resin material shown in FIG. 12 has a small number of parts and can be manufactured at low cost. When the lid is fastened to the case, Since the cord, which is the connecting means, is housed in the case, it is a good method without being exposed to rain wind, ultraviolet rays, etc. However, since the connecting means is housed in the case, the cord is formed thin. Therefore, when the lid is fastened to the case, the string is not bent and stored in the case in a certain shape, and when the lid is attached and detached, the string is provided on the circuit board. There was a problem of getting entangled with the parts. Furthermore, tension is always applied to the cord body that is bent and stored in the case, and the cord body is in a state of being pressed against the caulking portion formed at the screw tip of the lid body, and the cord body is repeatedly attached and detached. At this time, there is a problem in that the cord body may not rotate properly in the caulking portion, and as a result, the cord body may be twisted and cut in a severe case. In addition, the method using the ball chain requires a lot of members, so that it takes a long time to assemble and the material cost is high, which is a factor of cost increase. Further, since the connecting means is provided outside the case, it is necessary to make a strong weatherproof one that can withstand ultraviolet rays and rain and wind. Therefore, the present application has been made in order to solve the above-mentioned problems of the conventional technology, and an object thereof is to provide a case of an electronic device that houses an electronic circuit.
Another object is to provide a case for electronic equipment mainly for outdoor use. Another object is to provide a case of an electronic device that can be attached to both a wall surface and a mast. Another object is to provide a case of an electronic device that can be inspected and adjusted in an operating state. Another purpose is to provide the case with screw holes for inspection,
An object of the present invention is to provide a case of electronic equipment in which a lid is detachably attached to the screw hole. Another object of the present invention is to provide a structure for fixing a lid body in a case of an electronic device in which the lid body and the case are connected by a connecting means so that the lid body is not removed when the lid body is removed. Another object of the present invention is to provide a connection structure for a lid body in a case of an electronic device configured to be housed in the case when the lid means is fastened to the case. Another object of the present invention is to provide a connecting structure for a case of an electronic device, wherein the connecting means is configured to maintain a substantially constant shape when the lid is rotated by the screw hole of the case.

[0005]

In order to solve the above-mentioned problems, the invention of claim 1 provides a case in an electronic device accommodating a circuit board having circuit elements with a screw hole facing the circuit board. , A lid body having a size capable of closing the screw hole and having a male screw capable of being screwed into the screw hole is detachably attachable,
In a structure in which the lid is connected to a case via a connecting means, one end of the connecting means is locked by a locking means inside the case, and the other end of the connecting means is covered by a screw tip of the lid. It is connected to the body so that it can rotate relative to the body,
The connecting means is plate-shaped and can be bent.

According to a second aspect of the present invention, in the connecting structure according to the first aspect, the connecting means has a shape of the connecting means when the connecting means is housed in a case, and the lid body has the screw hole. It is configured to maintain a substantially constant value while rotating.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment embodying the present invention will be described below in detail with reference to the drawings. 1 to 3, reference numeral 1 denotes a case, which is a television receiving amplifier shown as an example of a high-frequency device in the present application, in which a screw mounting portion 3 is brought into contact with a wall surface 2 and a fastening screw 3a is inserted into a screw hole 3b. I'm wearing it. Case 1 of this TV receiver amplifier
Is composed of a case body 4 having an open front surface and a cover 6 fixed to the case body 4 by a fastening screw 5 so as to cover the open part of the case body 4, and is formed of, for example, aluminum. Has been done. The case body 4 is provided with a recessed groove 18 in the peripheral edge portion where the cover 6 and the case body 4 come into contact with each other, and a waterproof packing 10 is attached to the recessed groove 18 to ensure the waterproofness of the high-frequency device of the present application. There is.
In the case body 4, 5b is a screw hole for tightening the fastening screw 5, 41 is an F-type connector, 42 is a ground connection terminal, and 7 is a support column standing from the inside of the case body. Reference numeral 8 denotes a high-frequency circuit housed in the hollow portion of the case body 4, which is composed of a circuit board 9 fixed to the supporting column 7 by a screw rod 7a and a large number of circuit elements 9a attached to the circuit board 9 as is well known. . Reference numeral 11 is a circuit element to be adjusted, and a variable resistor is shown as an example. Reference numeral 11a denotes its rotation axis, which is shown as an example of an operating member.

Next, the cover 6 is provided with a recessed groove 12 at the peripheral edge where the cover 6 and the case main body 4 come into contact with each other. Ensures immunity to noise and jamming radio waves. Further, a screw hole 14 for inspection is formed in the cover 6 at a position facing an operation member described later. Reference numeral 5a is an insertion hole through which the fastening screw 5 is inserted. 15
Is a locking means provided in the case, and the connecting means 30
Lock one end of.

Next, the lid will be described with reference to FIG. Reference numeral 20 denotes a lid, which is made of brass plated with nickel in the present application, and has a size sufficient to close the screw hole 14 as shown in FIG. 21
Indicates a male screw, and is formed so as to be screwed with the female screw of the screw hole 14. Reference numeral 22 denotes a fitting groove formed on the side which becomes the surface of the lid body 20. A groove 25 into which a waterproof O-ring 24 is fitted is formed at the base of the screw shaft 23. Reference numeral 26 is a screw hole for fixing a stop portion of the connecting means 30 described later with a screw.

Next, the connecting means will be described with reference to FIG. Reference numeral 30 denotes a connecting means, in which 31 is a locking portion, 32 is a connecting portion, and 33 is a stopping portion, and in the present application, a synthetic resin material (for example, PET) is formed in a plate shape as shown in FIG. . Next, a method of connecting the connecting member 30 to the lid will be described with reference to FIG. Reference numeral 33 is a stopper provided at the other end of the connecting means 30, which is a screw hole 26 formed in a screw tip of the lid 20 (a surface facing the hollow portion in the case body).
It is attached with a fastening screw 27. At this time, the dimension of the shaft portion of the fastening screw 26 is formed to be slightly longer than the female screw forming portion of the screw hole 26, and the screw head of the fastening screw 27 and the screw tip of the lid 20 come into contact with each other. And the insertion hole 33 formed in the stopper 33.
Since the diameter of a is formed to be slightly larger than the diameter of the fastening screw 27, the connecting means 30 and the lid 20 are formed.
Allows relative rotation. Connecting means 30 to the lid 20
After attaching the stopper 33 of the
Then, the lid 20 is tightened in the screw hole 14.
Next, the locking portion 31 of the connecting means 30 is locked to the locking means 15 provided on the cover 6.

Next, a method of locking the locking portion 31 of the connecting means 30 will be described in detail with reference to FIGS. 2, 5 and 7.
Reference numeral 31 is a locking portion provided at one end of the connecting means 30, and is locked to the locking means 15 provided on the cover 6. The locking means 15 is integrally provided on the inside of the cover 6 with the same material as the cover 6. As shown in FIGS. 2 and 7, the locking means 16 and 17 projecting in an inverted L-shaped cross section are interlocked with each other. It is formed so as to oppose each other, and the dimension between the base portions 16a and 17a of the respective locking pieces is L1, and the end portions 16b and 1b of the respective locking pieces are
The dimension between 7b is formed to be L2.

Next, the connecting means 30 is provided with a recess 34 as shown in FIG. Here, the width of the locking portion 31 is W1 and the width between the recesses 34 is W2 with respect to the axis of the connecting means 30. First, as shown in FIG. 7, the connecting means 30 is bent approximately 90 degrees at the concave portion 34 of the connecting means 30. Next, the recess 34 and the ends 16b and 17b of the locking piece are arranged so as to be fitted to each other. Next, the locking portion 31 is pushed so that the concave portion 34 is press-fitted in the longitudinal direction of the locking piece. Thus, the locking portion 31 of the connecting means 30 is housed between the base portions 16a and 17a of the locking piece. At this time, the locking portion 31
Is formed so that the width W1 thereof is slightly larger than the dimension L1 between the bases 16a and 17a of the locking pieces, and the width W2 between the recesses 34 is slightly larger than the dimension L2 between the ends 16b and 17b of the locking pieces. By forming the connecting means 30 into the locking means 1
It is securely clamped in 5.

Next, the mounting state of the connecting means 30 will be described in detail with reference to FIGS. 8 and 9. As described above, the case 1 and the lid 20 are connected via the connecting means 30. Therefore, the axial length of the connecting means is such that the cover 20 covers the cover 20.
When the operation member 11a is operated from the screw hole 14 when the cover member 20 is removed from the screw hole 14, the cover member 20 has a length that does not interfere with the operation.
It is necessary to determine so as not to touch a large number of circuit elements 9a attached to the circuit board 9 when tightened in the screw holes 14 of the cover 6. As a result, when the lid body 20 is tightened in the screw hole 14 of the cover 6, the shape of the connecting means 30 when stored is as shown in FIG.

In the present application, the connecting means 30 is formed of a synthetic resin material (for example, PET), and the thickness thereof is as thin as approximately 0.2 mm in the present application, so that the connecting means 30 can be bent in the axial direction. It can be bent freely and has the shape described above when stored. However, the connection means 3 of the present application
Since 0 is formed in a plate shape as shown in FIG. 6, it is not possible to freely bend the connecting means 30 in a direction perpendicular to the axial direction.
That is, in order to remove the lid 20 from the screw hole 14 of the cover 6, while the lid 20 is rotated, the connecting means 3
At 0, a force is exerted to keep the same shape as when it is stored. In addition, as described above, since the connecting means 30 and the lid 20 are configured to be rotatable relative to each other, even when the lid 20 is tightened in the screw hole 14 of the cover 6, The connecting means 30 maintains a substantially constant shape even when it is removed.

Next, another embodiment of the connecting means 30 will be described with reference to FIG. In addition, the same reference numerals are used for the portions having the same or equivalent configurations as those in the previous figure in terms of function, and description thereof is omitted. As shown in FIG. 10, the connecting means 30 has a locking portion 3
1, a connecting portion 32, a stop portion 33, a concave portion 34, and an abutting portion 35, and in the present application, is formed in a plate shape with a synthetic resin material (for example, PET). Locking part 31, connecting part 32, stop part 3
The configuration of 3 is as described above. The connecting means 30 is shown in FIG.
It is stored in the case as shown in. For this reason, the connecting portion 32 acts as a spring, and a force is applied in the direction in which the locking portion 31 tends to disengage from the locking means 15. This embodiment corresponds to this. When the locking portion 31 of the connecting means is locked to the locking means 15 of the cover 6, the contact portion 35 is in a state of protruding from the locking means 15 toward the circuit board 9 as shown in FIG. The length of the abutment portion 35 in the axial direction is determined by the abutment portion 3 when the engagement portion 31 is engaged with the engagement means 15.
The end portion 35a of 5 is formed so as to contact the boss or the rib 7b provided on the case body 4 or the circuit board 9 (the rib 7b in the embodiment of the present application). By the action, the locking portion 3 of the connecting means 30
It is possible to suppress the force with which 1 disengages from the locking means 15, and it is possible to lock more reliably.

Next, examples other than those described above will be given. First, an example of another material of the connecting means 30 will be described. The embodiment of the case of the present application is formed by aluminum die casting, and as described above, a shield mesh is provided in the peripheral edge portion where the cover 6 and the case main body 4 come into contact with each other, and a structure in which importance is placed on immunity to external noise and jamming radio waves of the case. Has become. Therefore, the connecting means 30 may be made of metal and formed into a thin plate. Next, a case where the case 1 is made of a synthetic resin material (for example, ABS) will be described. In this case, in order to secure immunity to external noise and jamming radio waves, a circuit board having circuit elements is housed in a well-known shield case to form a unit. This makes it possible to provide a case that is lightweight and has excellent shielding properties. At this time, the lid 14 may also be made of a synthetic resin material (for example, ABS), and the connecting means 30 may also be made of a synthetic resin material (for example, PET), so that the weight of the case can be further reduced. Be peeled off. It should be noted that the embodiments shown in the present application are, for example, the case 1, the connecting means 20,
The shape, thickness, material, etc. of the locking means 15 are not limited to the above.

Next, the operation member 11 having the above-mentioned structure is used.
When the operation of a is to be performed, for example, a screwdriver is applied to the fitting groove 22 of the lid body 20 in the state of FIG. 8 to rotate the lid body 20, and the lid body 20 is rotated as shown in FIG. Remove from 1. Then, the operation member 11a is operated. When the operation is completed, the connecting means 30 (connecting portion 32) is again attached to the screw hole 1
4 to be housed in the case 1, and the lid 20 may be screwed into the screw hole 14. In the present application, an example of a variable resistor used for gain adjustment or the like is shown as an operation from the screw hole 14, but, for example, an operation knob of a slide switch for switching ON / OFF of an attenuator or the like may be placed. Further, a connector for checking the level etc. may be provided. Screw hole 14 for checking
Insert the corresponding plug through and connect to measure the level. After the level check is completed, the plug is separated from the connector, and after collection, the lid 20 is screwed into the screw hole.

The present invention is not limited to the above-mentioned embodiment, and the application and shape of each part can be appropriately changed and implemented without departing from the gist of the present invention.

[0019]

As described above in detail, according to the first aspect of the present invention, the case of the electronic device accommodating the circuit board having the circuit element is provided with the screw hole facing the circuit board, and the screw is provided. In the hole, a lid body having a size capable of closing the screw hole and provided with a male screw that can be screwed into the screw hole is detachably attachable, and the lid body is connected via a connecting means. In the structure to be connected to the case, one end of the connecting means is locked to a locking means inside the case, and the other end of the connecting means is connected to a screw tip of the lid so as to be rotatable relative to the lid. In addition, since the connecting means is formed in a plate-like shape and can be bent, the lid can be easily connected at low cost. Further, since the connecting means is housed in the case when the lid body is tightened in the screw hole, it is protected from rain and wind and ultraviolet rays, etc., and provides a tie-stop structure having good weatherability even when using an inexpensive material. it can.

According to a second aspect of the present invention, in the connection structure according to the first aspect, the connecting means has a shape of the connecting means when the connecting means is housed in a case, and the lid body has the shape described above. Since the screw holes are configured to be kept substantially constant while rotating, a connection preventing structure can be provided in which the connecting means does not get entangled or twisted with the parts provided on the circuit board.

[Brief description of drawings]

FIG. 1 shows a front view of an embodiment of the case of the present application.

FIG. 2 shows a side view when the case of the present application is attached to a wall surface. .

FIG. 3 shows an embodiment of a cover in the case of the present application.

FIG. 4 shows an example of a case body in the case of the present application.

FIG. 5 shows an example of the lid of the present application.

FIG. 6 shows an embodiment of the connecting means of the present application.

7 is an explanatory view in which a stopper of the connecting means of FIG. 5 is hinged to a lid.

FIG. 8 shows a method of attaching the locking portion of the connecting means to the locking means.

9 is a cross-sectional view taken along line HH of FIG. 1 showing a state where the connecting means of FIG. 5 is stored in the case.

10 is a cross-sectional view taken along line HH of FIG. 1 showing a state where the lid is removed in FIG. 5 and the operating member is operated by a driver.

FIG. 11 shows another embodiment of the connecting means of the present application.

12 is a cross-sectional view taken along line HH of FIG. 1 showing a storage state of the connecting means in FIG. 10 in a case.

FIG. 13 shows a conventional example using a cord.

FIG. 14 shows a conventional example using a ball chain.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Wall surface, 3 ... Screw mounting part, 3a ... Fastening screw, 3b ... Screw hole, 4 ... Case main body, 5 ... Fastening screw, 6
... cover, 7 ... support pillar, 7a ... screw rod, 7b ... rib, 8
... High frequency circuit, 9 ... Circuit board, 9a ... Circuit element, 10 ...
Waterproof packing, 11 ... Adjusted circuit element (variable resistor as an example), 11a ... Operating member, 12 ... Recessed groove, 13 ... Shield mesh, 14 ... Screw hole, 15 ... Locking means, 16,
17 ... Locking pieces, 16a, 17a ... Base, 20 ... Lid, 2
DESCRIPTION OF SYMBOLS 1 ... Male screw, 22 ... Fitting groove, 23 ... Screw shaft, 24 ... O ring, 25 ... Groove, 26 ... Screw hole, 27 ... Fixing screw, 30
... connecting means, 31 ... locking part, 32 ... connecting part, 33 ... stop part, 34 ... recessed parts 34, 35 ... abutting part, 35a ... end part, 4
0 ... Mast, 41 ... F type connector, 42 ... Ground connection terminal, 43 ... Mast mounting member, 44 ... Waterproof cap, 4
5 ... Monitor terminal waterproof cap, 51 ... String body, 52 ... Retaining bead, 53 ... Caulking part, 54 ... Recess, 55 ... Stop fitting, 61 ... Ball chain, 62 ... Stop fitting, 63 ... Connecting piece, 64 ... Mounting Child, 65 ... Coil portion, 66 ... Annular groove,
L1 ... Dimension between bases 16a and 17a, L2 ... end 16b
And 17b, W1 ... width of locking part, W2 ... width between recesses

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E084 AA05 AA14 AA23 AB10 BA02                       CA01 CC01 EA02 EB03 EC01                       FA09 FB03 GA04 GB04 HA04                       HB04 HD04 JA13 JA14                 4E353 AA17 AA18 CC12 CC14 CC32                       CC33 DD02 DD14 DR60 GG24                       GG32                 4E360 AB12 AB20 AB33 AB34 AB64                       BA08 BC05 CA03 EA05 EA18                       EB02 EC12 ED02 ED17 ED27                       GA04 GA06 GA29 GA47 GA53                       GB21

Claims (2)

[Claims] 1. A case in an electronic device containing a circuit board having circuit elements is provided with a screw hole facing the circuit board, and the screw hole has a size capable of closing the screw hole and the screw. In a structure in which a lid provided with a male screw that can be screwed into a hole is detachably attachable and the lid is connected to a case through a connecting means, one end of the connecting means is a case. The connecting means is locked to an internal locking means, the other end of the connecting means is connected to a screw tip of the lid body so as to be rotatable relative to the lid body, and the connecting means is formed in a plate shape and is bendable. A structure for fixing the lid body in an electronic device, which has been characterized. 2. The connection structure according to claim 1, wherein the connecting means has a shape of the connecting means when the connecting means is housed in a case, while the lid rotates the screw hole, A structure that keeps the lids of electronic devices almost constant.