KR19980063510U - Signal input terminal - Google Patents

Abstract

The present invention is a signal input terminal (BNC Jack) used to connect a coaxial cable to a circuit board built into the main body of a device in an electronic device that receives a signal through a coaxial cable from the outside, in particular, In order to prevent eccentricity, both ends of the outer peripheral surface of the cylindrical body fixed to the bracket are signal input terminals formed in a flat shape.

The present invention is coupled to the socket 60 of the coaxial cable 40, the hollow cylindrical body 51 is fixed to the bracket 70 attached to the rear of the image output circuit board 10, and the body 51 The core pipe 52 which is embedded in the direction and connects the core pipe 52 of the coaxial cable 40 to a predetermined terminal of the substrate 10, and is filled in the body 51 to connect between the body 51 and the core pipe 52. In the signal input terminal 50 including the insulator 53 to insulate, the tip 51a of the body 51 prevents the core tube 52 from being eccentric by a torsional force acting on the body 51. To this end, at least both sides of the outer periphery are formed in a flat shape, and in this configuration, since the center movement of the core pipe 52 due to the fastening force applied to the body during assembly or the external force after assembly is prevented, the signal input terminal The assemblability of the image output circuit board can be greatly improved.

Description

Signal input terminal

The present invention relates to a signal input terminal (BNC Jack) used to connect a coaxial cable to a circuit board built into a main body of an apparatus in an electronic device that receives a signal through an external coaxial cable. Specifically, in order to prevent the eccentricity of the core tube, the present invention relates to a signal input terminal in which both ends of the outer peripheral surface of the cylindrical body fixed to the bracket are molded in a planar shape.

In a video output electronic device such as a color monitor or television that receives an electric signal from an external source and outputs an image, a video PCB is installed to send an applied signal to an image output unit.

As shown in the exploded perspective view of FIG. 1 of the accompanying drawings, the circuit board 10 is vertically installed at the rear end of the main substrate 30 behind the cathode ray tube (CRT) 20 corresponding to the rear side of the apparatus body. The substrate 10 receives an image signal from the coaxial cable 40 drawn from an external device (PC or antenna, etc.).

A signal input terminal 50 is a connection terminal used to connect the coaxial cable 40 drawn from a PC or an antenna to the image output circuit board 10 for inputting an image signal to the image output circuit board 10. .

Two examples of signal input terminals conventionally used in FIGS. 2 and 4 of the accompanying drawings are shown in an exploded perspective view.

As shown, the signal input terminal 50 is fixed to the bracket 70 attached to the image output circuit board 10 while acting as a case to ground the outer conductor of the coaxial cable 40 to the bracket 70. A hollow cylindrical body 51 and an elongated core tube made of copper material which is embedded in the body 51 in the longitudinal direction and connects the core wire of the coaxial cable 40 to the terminal of the board 10. (52), and an insulator (53) filled in the body (51) to insulate the core pipe (52) with respect to the body (51), which is a bracket (attached to the rear of the image output circuit board (10). 70) is installed.

The body 51 can be seen to be separated into a front end 51a fixed to the bracket 70 based on the stopper 51c in the center and a rear end 51b coupled to the socket 60 of the coaxial cable 40. 2 and 4, the signal input terminal 50 of FIG. 2 has a threaded portion formed on the outer circumference of the front end 51a of the body 51, and the signal input terminal of FIG. 50 differs in that the front end 51a of the body 51 is formed with a caulking 51d extending in the longitudinal direction from the stopper 51c.

Accordingly, in the signal input terminal 50 of FIG. 2, the tip 51a of the body 51 is fitted into the mounting hole 71 of the bracket 70, and the washer 54 and the nut 55 are fitted to the tip 51a. It is fixed to the bracket 70 by being fastened one by one. As for the signal input terminal 50 of FIG. 4, after the front end 51a of the body 51 is fitted in the installation hole 71, the caulking 51d is installed in the installation hole 71. ) Is fixed to the bracket 70.

The stopper 51c commonly installed in the signal input terminal 50 of the two examples is a locking step for preventing further insertion when the front end 51a of the body 51 is fitted to the bracket 70 installation hole 71. The rear end 51b of each body 51 is formed with two binding protrusions, and as shown in FIG. 1, the coaxial cable has a curved long groove 61 corresponding to the binding protrusions. 40 is coupled to the socket 60 is installed at the tip.

On the other hand, the video signal input to the monitor is usually composed of five synchronization signals such as color (red, blue, green), horizontal and vertical, so that five coaxial cables for applying these video signals to the image output circuit board 1 are provided. 40 are connected. Therefore, the bracket 70 is provided with five signal input terminals 50 for connecting the five coaxial cables 40 to the image output circuit board 10.

However, in the state in which the signal input terminals 50 are installed in the bracket 70, each core tube 52 passes through the through hole of the image output circuit board 10 so that each signal can be correctly soldered and connected to a corresponding terminal. The body 51 of the input terminals 50 should be fixed in the correct position on the bracket 70. To this end, the installation hole 71 of the bracket 70 to which the outer periphery 51a of the body 51 and the tip 51a of the body 51 are fitted is as shown in FIGS. 3 and 5. , The body 51 is produced in a circular cut, that is, a D-shaped cross section so that the body 51 is not twisted by an external force. This structure also serves to set the assembly position of the body 51.

However, as described above, the conventional signal input terminals 50 in which the tip 51a of the body 51 has a D-shaped cross section have the body 51 by the nut 54 fastening force or the pressing force against the caulking 51d. When the torsional force is applied, the body 51 is rotated in the clockwise direction with respect to the portion where the body 51 is in contact with the installation hole 71 (upper right side in the drawing) and the core pipes 52 are eccentric in the direction of the arrow. For this reason, when the bracket 70 is attached to the substrate 10, the core tube 52 is poorly connected to the terminal of the substrate 10, or in severe cases, the core tube 52 is installed in the bracket 70. Since the insertion of the substrate 10 into the through hole is impossible, there is a problem in that it cannot be assembled to the image output circuit board 10 at all.

Thus, the present invention, the problem with the conventional signal input terminal as described above is solved, both sides of the outer peripheral surface of the body tip is formed in a flat shape, the torsional force acting on the body when fixing the body to the bracket installation hole It is an object of the present invention to provide a signal input terminal in which the core tube is not eccentric during assembly by distributing the two repulsive forces opposite to the installation hole opposite to the installation hole to the body with torques opposite to each other.

1 is an exploded perspective view of a typical monitor.

Figure 2 is an exploded perspective view showing an example of a conventional signal input terminal.

FIG. 3 is a front view of the A direction of FIG. 2; FIG.

Figure 4 is an exploded perspective view showing another example of a conventional signal input terminal.

Fig. 5 is a front view of the B direction in Fig. 4.

Figure 6 is an exploded perspective view showing a fixed structure of the signal input terminal according to an embodiment of the present invention.

FIG. 7 is a C front view of FIG. 6; FIG.

Figure 8 is an exploded perspective view showing a fixed structure of the signal input terminal according to another embodiment of the present invention.

9 is a front view of the D direction in FIG. 8;

Explanation of symbols on the main parts of the drawings

10: Video output circuit board

20: cathode ray tube

30: main board

40: coaxial cable

50: signal input terminal

51: body

51a: Tip

51b: the end

51c: stopper

51d: caulking

52: core

70: bracket

71: installation worker

The present invention has the object as described above, the rear end is coupled to the socket of the coaxial cable, the front end of the hollow cylindrical body is fixed to the insertion hole of the bracket attached to the image output circuit board and the longitudinal direction to the body The front end is connected to a predetermined terminal of the substrate through the through hole of the video output circuit board, and the rear end is connected to the core wire of the coaxial cable to connect the core of the coaxial cable and the terminal of the video output circuit board. In the signal input terminal comprising a connecting core and an insulator filled between the body and the core to insulate the body and the core, in order to prevent the core from being eccentric by torsional force acting on the body, At least both sides of the outer peripheral surface of the front end of the body is characterized in that it is molded in a plane.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention consisting of the above configuration will be described in more detail.

In the description of the present embodiment, the same reference numerals are used for the configuration of the present invention, which is the same as the conventional technology described at the outset, and only the improved parts will be described so as not to overlap with the prior art for clarity.

Figure 6 of the accompanying drawings is an exploded perspective view showing a fixing structure for the bracket of the signal input terminal according to an embodiment of the present invention, Figure 7 is a front view seen from the C direction of FIG. And, Figure 8 is an exploded perspective view showing a fixing structure for the bracket of the signal input terminal according to another embodiment of the present invention, Figure 9 is a front view seen from the D direction of FIG.

Signal input terminal 5 according to an embodiment of the present invention, as shown in Figure 6, the cylindrical body 51 is fixed to the bracket 70 while grounding the outer conductor of the coaxial cable 40, the body (51) The core tube 52, which is built in the longitudinal direction and protrudes from the tip end portion 51a of the body 51, and is filled in the body 51 to the body 51 and the core tube 52 It consists of an insulator (not shown) etc. which insulate.

Two binding protrusions are formed on the rear end 51b of the body 51, and a ring-shaped stopper 51c is formed on the outer circumference of the middle portion. The thread is formed on the outer circumference of the tip 51a of the body 51, which is located in front of the stopper 51c and inserted into the installation hole 71 of the bracket 70, which is cut off on both sides when viewed in cross section. Circular, that is, as shown in FIG. In addition, the installation hole 71 of the bracket 70 into which the front end 51a of the body 51 is fitted is also formed in a circular shape in which both sides of the front end 51a of the body 51 are cut out.

The core pipe 52 is embedded in the body 51 in the longitudinal direction, the tip of which protrudes toward the front of the body 51 and penetrates the substrate 10 to be soldered to a predetermined terminal.

The signal input terminal 50 of the embodiment of the present invention having such a configuration, first, the front end 51a of the body 51 is fitted to the installation hole 71 of the bracket 70 and then to the front end 51a on the opposite side. The washer 54 and the nut 55 are fastened and fixed to the bracket 70. In this state, the bracket 70 is attached to the substrate 10 and the coaxial cable 40 is attached to the rear end 51b of the body 51. By coupling the socket 60 of the coaxial cable 40, the coaxial cable 40 is connected to a predetermined terminal of the substrate 10.

Meanwhile, the signal input terminal of one embodiment of the present invention is fixed to the bracket 70 by fastening the washer 54 and the nut 55, while the signal input terminal of the other embodiment has a bracket 70 by crimping 51d. ) Is fixed.

That is, the signal input terminal 50 according to another embodiment is formed with a caulking (51d) extending in the form of a valve from the stopper (51c) of the body 51 to the tip (51a) side as shown in FIG. After the front end 51a of the body 51 is fitted into the installation hole 71 of the bracket 70, the caulking 51d is shown as an imaginary line of FIG. 9 by an external force by the jig. In the form, the bracket 70 is pressed around the installation hole 71 and fixed to the bracket 70.

The signal input terminal 50 has a circular shape in which the outer circumferential surface of the caulking 51d and not the body 51 and the bracket 70 have a circular shape in which a part of both sides of the installation hole 71 is cut off, and thus is fixed to the bracket 70. Eccentricity is prevented in the state.

Signal input terminals of one embodiment and another embodiment of the present invention having a structure as described above in detail, the circular symmetry of the front end 51a of the body 51 or the cross section of the caulking 51d is cut off both sides With the cross section, when a rotational force is applied to the body 51, both flat portions receive a repulsive force from the installation hole 71 at the same time, so that the repulsive forces act as a torque in the opposite direction with respect to the body 51. Therefore, the body 51 is not rotated relative to the installation hole 71. Therefore, the core tube 52 located in the center of the body 51 is not eccentric.

For example, when the body 51 is subjected to a clockwise rotational force, the body 51 is left from the installation hole 71 of the bracket 70, as can be seen in the figures of FIGS. 7 and 9. Repulsion is received at the bottom and top right. These repulsive forces are canceled by acting as torque in the opposite direction to the body 51 and fail to rotate the body 51. In this way, the body 51 is not rotated relative to the installation hole 71 even when the external force in the rotational direction is received, so that the core pipe 52 in the center of the body 51 is not eccentric at the center of the installation hole 71. do.

As described above, the signal input terminal according to the present invention is not eccentric by the external force received during or after assembly, thereby eliminating the problem of connection or assembly failure due to the eccentricity of the core tube seen in the conventional signal input terminal. Can be.

According to the present invention as described in detail above, the relative rotation to the installation hole of the body is prevented by the fastening force applied during assembly or the external force after assembly, etc., so that problems of connection failure or inability to assemble the coaxial cable due to core eccentricity are prevented. This eliminates the assembly of the signal input terminal to the image output circuit board.

The present invention is not limited to the specific preferred embodiment described above, and any person having ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention claimed in the scope of utility model registration claims Would be possible.

Claims (1)

The rear end is coupled to the socket of the coaxial cable, the front end is a hollow cylindrical body which is inserted and fixed in the installation hole of the bracket attached to the rear of the video output circuit board, Disposed in the body in a longitudinal direction, the front end of which is connected to a predetermined terminal of the substrate through a through hole of the video output circuit board, and the rear end of the main body of the coaxial cable is connected to the core of the coaxial cable A core pipe connecting the terminals of the circuit board, In the signal input terminal comprising an insulator filled between the body and the core tube and insulates the body and the core tube, Signal input terminal, characterized in that at least both sides of the outer peripheral surface of the front end of the body is formed in a plane in order to prevent the core tube from being eccentric by the torsional force acting on the body.