JPH088551A - Electronic equipment - Google Patents

Abstract

PURPOSE:To lessen the distance between a connecting conductor and a circuit board when a connecting plug seat is mounted by a method wherein a connecting plug seat main body is inserted into a mounting hole, a flange is made to bear against the inner surface of a mounting board, and a fitting member which is so shaped as to complement an expansion hole to enable an engaging pawl to be fitted in the expansion hole as the engaging pawl is fitted in a cutout is provided. CONSTITUTION:A connecting plug seat 10 is provided to a mounting board, wherein the main body 11 of the connecting plug seat 10 is inserted into a mounting hole provided to a mounting board 4, a fitting member 13 is fitted in an expansion hole 6, and an engaging pawl 7 is engaged with a cutout 14. A nut 18 is fitted in the screwed part 11 of the main body 11, and the board 4 is pinched between the nut 18 and the flange 12. When the nut 18 is tightened, the fitting member 13 fitted in the expansion hole 6 and the engaging pawl 7 fitted in the cutout 14 stop the main body 11 from rotating together with the nut 18, whereby the nut 18 can be easily tightened. In a state that the connecting plug seat 10 is mounted on a board, the edge of a circuit board is located at the cutout of the flange 12. Therefore, a distance between a connecting conductor 16 of the connecting plug seat main body 11 and the circuit board is lessened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device such as a branching device, a distributor or a booster, and more particularly to an electronic device provided with a connector for connecting a transmission line.

[0002]

2. Description of the Related Art As shown in FIG. 7, a mounting board 5f for mounting a connector seat in a housing is provided with a mounting hole 5f for inserting the body of the connector seat. The mounting hole 5f is formed by expanding two portions of the mounting hole 5f which are opposed to each other in the radial direction in the radial direction to form expansion holes 6f for fitting the fitting members. A circuit board 3f is arranged in the housing in the vicinity of the mounting hole. On the other hand, the connector seat for attaching to the mounting board has a main body provided with a connecting conductor at the center of the end portion on the side to be positioned in the housing, and the outer periphery of the main body with respect to the mounting board. A flange for abutting is integrally attached, and a screw part for nut screwing is formed on the outer peripheral surface of the main body.
A fitting member for fitting the expansion hole in a state where the main body is inserted into the mounting hole and the collar is brought into contact with the mounting substrate is integrally provided. When the main body of the stopper seat is inserted into the mounting hole and the fitting member is fitted into the expansion hole 6f, and the mounting board 4f is sandwiched by the flange and the nut screwed to the screw portion, The connector seat is attached to the mounting board 4f (see, for example, Japanese Utility Model Laid-Open No. 57-140781).

In the above structure, a sufficiently large overlapping area of the mounting substrate 4f and the collar can be obtained, so that the mounting substrate can be firmly tightened by the collar and the nut, and the axial direction of the mounting hole, that is, the mounting substrate. A strong fixed state can be achieved in the direction perpendicular to the plane. Further, by fitting the fitting member into the expansion hole, it is possible to prevent co-rotation of the main body when tightening the nut, resulting in good workability.

[0004]

However, in the above configuration, since the brim is largely projected to the side, the circuit board 3f in the housing is
Is the part 12f where the tsuba is located as shown in the figure so that it does not hit the tsuba
Must be placed in a position that avoids
There is a problem that the distance L between the 3f and the connection conductor becomes large, and a mismatch occurs when transmitting a high frequency signal between them. Also, when tightening the nut or screwing the connector to the connector seat after mounting, if a wrench is used to perform those operations in order to perform a firm mounting, the fitting member for the expansion hole 6f There is a problem that the rotation preventing force is insufficient in the fitting, the peripheral edge of the mounting hole 5f in the mounting board and the fitting member of the connector seat are damaged, and the main body rotates together. In addition to the expansion hole 6f, a larger number of expansion holes are indicated by a chain double-dashed line in order to increase the rotation blocking force.
If 6f is provided and there are four places, mounting board 4f
In the periphery of the mounting hole 5f, the portions 31, 31, ..., which engage with the fitting member of the contact plug seat and act as a detent thereof, become extremely small and the strength is reduced, which eventually increases the rotation blocking force. There was an unconnected problem.

The electronic equipment of the present invention is provided to solve the above-mentioned problems (technical problems) of the prior art.
The first purpose is to make it possible to reduce the distance between the connection conductor and the circuit board in a state where the connector seat is attached to the attachment board, and to perform high-frequency signal transmission between the two with good matching. To provide the electronic device. A second object is to make a part of the flange of the stopper seat defective as a means for reducing the distance, and to arrange the disposition position of the rotation stopping means of the stopper seat main body in a specific positional relationship with respect to the defective portion. The choice is to allow the detent means to be provided at a plurality of locations. A third object is to make it possible to obtain a large rotation blocking force by providing the detent means at a plurality of locations. A fourth object is to prevent the tightening force of the mounting board by the collar and the nut from being weakened even if the detent means are provided at a plurality of locations. Other objects and advantages will be readily apparent from the drawings and the following description related thereto.

[0006]

In order to achieve the above object, in an electronic device according to the present invention, a mounting board for mounting a connector seat on a housing has a mounting hole for inserting a body of the connector seat. And a circuit board is arranged in the housing in the vicinity of the mounting hole, while the connector seat for mounting on the mounting board is connected to the center of the end located on the housing side. It has a main body provided with a conductor, and on the outer periphery of the main body, a collar for abutting against the inner surface of the housing of the mounting substrate is integrally attached, and the outer peripheral surface of the main body is attached. Is formed with a screw portion for screwing a nut, and further, the plug base is provided with a nut for sandwiching the mounting substrate with the collar by screwing with the screw portion, Insert the body of the stopper seat into the mounting hole, and use the collar and nut to In an electronic device in which a mounting board is sandwiched and the connector seat is mounted on the mounting board, the mounting hole is located at the circuit board side edge of the mounting hole. Since the fitting member is fitted to both sides of the mounting hole in the direction parallel to the direction of the side of the circuit board, the radial dimension of the flange and the nut is set to be smaller than the radius dimension of the flange and the nut. An expansion hole extending to a position of a small radius is provided, and an engaging claw protruding toward the inside of the housing is provided at each intermediate portion of the peripheral edge of each expansion hole, while the peripheral edge of the collar is provided. A part of a part of the board is formed with a defect portion for allowing the side of the circuit board to remain so that the connection conductor is located close to the side of the circuit board in a state where the body is inserted into the mounting hole. ,
A notch for fitting the engaging claw is formed at a position where the engaging claw overlaps with the side of the circuit board in the defective part, and the main body is inserted into the mounting hole. Then, in a state where the flange is brought into contact with the inner surface of the mounting substrate and the engaging claw is fitted in the missing portion, the fitting of a shape that complements the expansion hole is fitted in the expansion hole. A member is attached.

[0007]

In the case of mounting the connector seat to the housing, the body of the connector seat is inserted into the mounting hole of the mounting board, the fitting member is fitted into the expansion hole, and the engaging claw is fitted into the missing portion. . Then, a nut is screwed into the threaded portion of the main body, and the board is sandwiched between the nut and the collar. In the case of tightening the nut, the fitting member that fits in the expansion hole and the engaging claw that fits in the cutout portion prevent co-rotation of the main body with respect to the nut, and facilitate the nut tightening work. . In the mounted state, the edge portion of the circuit board can be located at the defective portion of the collar. Therefore, the distance between the connection conductor of the contact plug seat body and the circuit board can be reduced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a housing of an electronic device, and 2a and 2b are an input terminal and an output terminal, respectively, which are attached to the housing. Reference numeral 3 shown in FIGS.
The circuit board provided inside is shown, and the housing 1 is provided by a well-known means.
It is designed to be fixed at a predetermined place inside. Next, a description will be given of FIGS. 2 to 5 showing a mounting structure of the connector seat on the housing 1. Reference numeral 4 denotes a mounting board of the housing 1, which is provided for mounting the contact plug seat. The mounting substrate 4 also forms a ground circuit of the electronic device, and is made of a metal plate such as a steel plate. Reference numeral 5 is a mounting hole for inserting the body of the connector seat. The mounting hole 5 is provided in such a positional relationship that an edge 5a on the circuit board 3 side is in contact with one side 3a of the circuit board 3 on the mounting hole side. Numerals 6 and 6 are expansion holes in which a fitting member is fitted to prevent the body of the contact plug seat from rotating, and extend in a direction parallel to the direction 3b of the side 3a of the circuit board 3 at the peripheral edge of the mounting hole 5. Both side portions are formed in a state of being expanded in a direction parallel to the direction 3b. Reference numerals 7 and 7 are engaging claws for preventing the body of the connector seat from rotating, and project in the axial direction of the mounting hole 5 toward the inner side of the housing 1 at intermediate positions on the peripheral edges of the respective expansion holes 6. It is set up. The engagement claw 7 is formed, for example, on the substrate 4
In addition, when the mounting hole 5 and the expansion hole 6 are punched out by a pressing means, a part thereof is cut and raised. The width W of the engaging claw 7 is preferably determined so that a necessary and sufficient rotation inhibiting force can be obtained, and the absent portion described later can be made as small as possible, for example, 3 mm.

Next, reference numeral 10 shows a connector seat used as the input terminal 2a and the output terminal 2b. The main body 11 is formed in a cylindrical shape as shown in the figure. Reference numeral 11a indicates a screw portion formed on the outer peripheral surface of the main body 11 for screwing the nut and the connector.
Reference numeral 12 denotes a flange for abutting against the surface of the mounting substrate 4 on the inner side of the housing, which is an example of a part of the outer circumference of the main body 11 provided on the outer circumference of one end. It may be the outer circumference of the middle part. The collar 12 is electrically connected to the body 11 together with the connector 10
Constitutes the outer conductor of. Reference numeral 12a denotes a deficiency portion of the collar for keeping the side 3a of the circuit board 3, and is formed in a state where a part of the periphery of the collar 12 is cut to a position where it overlaps with one tangent to the main body 11. Reference numeral 12b is a defect portion formed on the side opposite to the defect portion 12a for forming a fitting member described below. The defective portion 12b is formed in order to facilitate the formation of the fitting member, and it is not necessary to positively provide it. 13 is the main body 11 for fitting in the expansion hole 6
Is formed in a shape that complements the expansion hole 6 with a fitting member attached to a part of. The fitting member 13 is formed, for example, as follows. That is, when the main body 11 is formed, the bulging portions for forming the collar and the fitting member are formed in a circular shape as shown by imaginary lines 12c and 13c, respectively. After that, a part of their peripheral edges is ground and formed into a flat shape as shown. Reference numerals 14 and 14 denote notches formed on the collar 12 for fitting the engaging claws 7 and 7 to each other. The width of the lacking portion 14 is preferably formed as small as possible within a range in which the engaging claw 7 can be fitted in order to leave a large area of the collar 12 overlapping the substrate 4. Next, 15 is a well-known insulator for electrically insulating the outer conductor and the central conductor, and 16 is the main body.
The connection conductor is provided at the center of the end portion of the housing 11 on the side to be located in the housing, and is composed of a portion of the center conductor held by the insulator 15 that protrudes from the insulator to the outside. Reference numeral 18 is a well-known nut for fixing to the substrate 4.

Next, the dimensional relationship of each part of the mounting substrate and the contact seat is shown below. Diameter D of mounting hole 5
1 is formed to be slightly larger than the diameter D0 of the main body 11 so that the main body 11 can be inserted without rattling. The radial dimension R1 of each expansion hole 6 and 6 is the radius R of the collar 12 so that the collar 12 and the nut 18 are left with the overlapping portion with the mounting substrate 4.
2 and the radius R3 of the nut 18 (the minimum radius portion in the peripheral flat portion). The D0 is, for example, 9
mm, D1 is 9.5 mm, R1 is 5.5 mm, R
2 is 6 mm and R3 is 6 mm.

Next, the assembly of electronic equipment will be described. First, the connector seat 10 is attached to the attachment substrate 4 as follows. From the state shown in FIG. 2, the main body 11 is inserted into the mounting hole 5, the fitting members 13 are fitted into the expansion holes 6, respectively, and the engaging claws 7 are fitted into the notches 14. Next, attach the nut 18 to the threaded part of the main body 11.
By screwing into 11a and abutting it on the board 4 and further tightening it, the collar 12 and the nut 18 abut on the inner surface and the outer surface of the mounting board 4, respectively, as shown in FIG. The substrate 4 is sandwiched between them. This completes the mounting.

When tightening the nut 18, the fitting members 13 are fitted in the expansion holes 6 respectively, and the engaging claws 7 are fitted in the missing portions 14, respectively. The rotation of the main body 11 due to the movement is prevented. In addition, the blocking force becomes large by combining the rotation blocking forces of the above-mentioned multiple detent means. In this case, as described above, the expansion hole 6 is directional.
Since it is provided only on both sides in the direction parallel to 3b, the fitting member
Regarding the rotation prevention by 13, the rotation prevention can be performed by a relatively long portion in the circumferential direction at the peripheral edge of the attachment hole 5 in the attachment substrate 4 as indicated by reference numeral 5b in FIG. 4B. Yes, it can exert a great stopping power. Regarding the rotation prevention by the engaging claws 7, as described above, the engaging claws 7 are provided at the peripheral edge of the expansion hole 6, that is, at the position where the distance from the axial center of the main body 11 is the longest, so that the engaging claw 7 has a narrow width. A large rotation blocking force can be obtained by the engagement claw 7. With such a narrow engaging pawl 7, the lacking portion 14 provided in the corresponding portion of the collar 12 may also have a narrow width, and therefore, as shown by reference numeral 12d in FIG. Since a relatively long portion can be left in the circumferential direction and the rotation can be blocked by that portion, a large blocking force can be exerted.

In the state where the above-mentioned tightening is completed, the fixing strength in the axial direction of the contact plug seat with respect to the mounting substrate 4 is large. That is, since the structure for preventing the rotation is as described above, the collar 12 is superposed on the mounting substrate 4 in a wide range as shown by reference numeral 12e in FIG. Therefore, when the mounting substrate 4 is sandwiched between the collar 12 and the nut 18, the mounting substrate 4 can be firmly tightened, and the axial fixing strength between the mounting substrate 4 and the connector seat can be increased. .

Next, as shown in FIG. 6, the circuit board 3 on which various circuit elements 22 are mounted and the mounting board 4 are arranged in a positional relationship as shown in FIGS. 4B and 5C, that is, defective. Part 12
The side 3a of the substrate 3 is mechanically coupled to the substrate 3a (the coupling means may be any known means such as screwing or caulking), and the connecting conductor is then connected as shown by reference numeral 23 in FIG. 16 is soldered to the signal circuit of the circuit board 3, and the mounting board 4 is soldered to the ground circuit of the circuit board 3 as indicated by reference numeral 24. When the mounting board 4 and the circuit board 3 combined in this way are incorporated into the main body 1a of the housing 1 as shown in FIG. 6, an electronic device is completed.

A transmission line such as a coaxial cable is used for the electronic device.
When connecting 25, for example, an F-type connector 26 attached to the end of the coaxial cable 25 is connected to the connector 10. The connection is made by screwing the nut 27 of the connector 26 onto the threaded portion 11a of the main body 11 as is well known. In this case, the nut
Even if 27 is tightened with a large force using, for example, a wrench, the main body 11 is prevented from rotating with a large blocking force as described above, so that the main body 11 is erroneously rotated and the connection conductor for the circuit board 3 is connected. It is possible to prevent the occurrence of an accident that damages the connection state of 16. Generally, when a nut (for example, the nut 18 or the nut 27) is tightened by using a tool (spanner), a torque of about 50 kgf · cm is applied. However, with the above configuration, 160 kgf · cm, which is more than three times that
Because it can withstand a rotating torque up to a level,
11 and the mounting substrate 4 are not destroyed.

[0016]

As described above, according to the invention of the present application, when the connector seat is attached to the mounting substrate by achieving the above object, even if the nut is rotated with a large force by using a tool such as a wrench,
The main body can be reliably prevented from rotating, and reliable attachment can be performed with easy work. Moreover, a large fixing force can be obtained in the attached state, and the connection conductor of the connector seat and the circuit board can be obtained. The distance can be reduced, and the high-frequency signal can be transmitted between the two in good matching.

[Brief description of drawings]

FIG. 1 is a perspective view of an electronic device.

FIG. 2 is an exploded perspective view showing a relationship between a substrate and a connector seat.

FIG. 3 is a front view of the connector seat.

FIG. 4A is a plan view of a mounting hole portion in a board,
FIG. 6B is a plan view showing a state in which the connector is attached to the substrate.

5A is a sectional view taken along line 5A-5A in FIG.
5B is a sectional view taken along line 5B-5B in FIG. 4, and FIG. 5C is a sectional view taken along line 5C-5C in FIG.

FIG. 6 is a sectional view for explaining a state in which the connector is connected to the connector seat.

FIG. 7 is a diagram showing a structure around a mounting hole in a conventional mounting substrate.

[Explanation of symbols]

 1 Case 3 Circuit Board 4 Mounting Board 5 Mounting Hole 6 Expansion Hole 7 Engaging Claw 11 Main Body 12 Collar 13 Fitting Member 14 Missing Part

Claims (1)

[Claims] 1. A mounting board for mounting a connector seat in a housing is provided with a mounting hole for inserting a body of the connector seat, and a circuit board is provided in the housing in the vicinity of the mounting hole. On the other hand, the connector seat for mounting on the mounting board has a main body provided with a connecting conductor in the center of the end on the side to be positioned in the housing, and the above-mentioned mounting on the outer periphery of the main body. A flange for abutting against the inner surface of the housing of the board is integrally attached, and a screw portion for nut screwing is formed on the outer peripheral surface of the main body. A nut for sandwiching the mounting substrate with the collar by screwing the threaded portion is provided, and the body of the connector seat is inserted into the mounting hole, and the collar and the nut are inserted. And clamp the mounting board, and attach the connector seat to the mounting board. In the electronic device, the position of the mounting hole is determined such that the edge of the mounting hole on the circuit board side is in contact with the side of the circuit board on the mounting hole side, and the direction of the side of the circuit board in the mounting hole. On both sides in the direction parallel to, in order to fit the fitting members respectively, expansion holes extending to the positions of the radial dimension smaller than the radial dimensions of the collar and nut are extended, and Engaging claws projecting toward the inside of the housing are provided in the intermediate portions, respectively, while the connecting conductors are provided in a part of the periphery of the collar when the main body is inserted into the mounting hole. In order to locate the side of the circuit board close to the side, a defect is formed to keep the side of the circuit board, and the engagement claw overlaps with the side of the circuit board in the defect. At the position where In the main body, the main body is inserted into the mounting hole, the collar is brought into contact with the inner surface of the mounting substrate, and the engaging claw is fitted into the lacking portion. For mating,
An electronic device comprising a fitting member having a shape that complements the expansion hole.