JPH0425821Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to public listening equipment that amplifies, branches, or distributes signal currents such as television signals, and particularly relates to public listening equipment that is installed in the casing of the communal listening equipment. The present invention relates to a contact post as a connecting terminal and a contact post holder that supports the contact post.

[Prior art]

When receiving TV waves, when multiple receivers are connected to one antenna for shared listening, the TV signal from the antenna is first amplified by an amplifier, and then distributed and branched to be sent to each TV receiver. ing. In the casing of public listening equipment that amplifies, distributes, or branches television signals, for example, there are
As described in the publication, a connection terminal (designated 5 in the former publication and 21 in the latter publication) to which the connector core wire of the coaxial cable is connected is provided. That is, the signal current from the coaxial cable is input to the electric circuit of the public listening equipment through its connection terminal (hereinafter referred to as a contact post). The contact post must be fixedly attached to the casing, and this is done by being held and attached by a contact post holder (hereinafter simply referred to as a holder) made of an insulating material such as plastic.

On the other hand, operating the amplifier requires an applicable frequency power supply, which is supplied using a coaxial cable for carrying the signal current. A current passing circuit is provided in the divider and branch to pass the commercial frequency power supply.

[Problem that the invention attempts to solve]

Since the power supply capacity of the power supply increases as the output of the amplifier increases, the power supply current flowing through the coaxial cable also increases. Accordingly, the contact post to which the coaxial cable is connected must also be made thicker. However, when the number of public listening houses or the number of public listening terminals is small, a small amplifier and a small power supply capacity are required, so the contact posts are made thinner to reduce stray capacitance.

However, when the diameter of the contact post is changed according to the power supply capacity of the power supply, there is a problem in that the holder that insulates the contact post from the casing also has to be changed.

An object of the present invention is to provide a holder that can accommodate multiple types of contact posts.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Means for solving problems]

A brief overview of typical devices among the devices disclosed in this application is as follows.

That is, in the portions of the upper and lower holders that support the contact posts, penetrating support holes having different diameters are provided in the upper and lower holders, and among the contact posts, the first type of contact posts have terminal portions. The diameter of the bottom portion is approximately the same as that of the support hole of the upper holder, and the diameter of the bottom portion is approximately the same as that of the support hole of the lower holder. Further, the second type of contact post has a terminal portion having a diameter comparable to that of the support hole of the lower holder, and a bottom portion having a diameter approximately equal to that of the support hole of the upper holder.

With the above configuration, the core wire guide is miniaturized,
Since the area occupied in the holder becomes smaller, the holder that supports the core wire guide and the connection terminal can be made smaller.

[Effect]

The upper holder of the first type contact post is
It becomes the lower holder of the seed contact post, and the first
Since the lower holder of the first type of contact post becomes the upper holder of the second type of contact post, one holder can accommodate multiple types of contact posts.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In addition, in all the figures for explaining the examples,
Components having the same function are given the same reference numerals, and repeated explanations thereof will be omitted.

FIG. 1 shows a public listening system from an antenna to a receiver.

In FIG. 1, ANT is an antenna, and the television signal received here is passed through a coaxial cable K and amplified by an amplifier ANP. The output of the amplifier ANP is distributed by a distributor 1 through a coaxial cable K, further branched into a plurality of parts by a branch Q, and then sent to each television receiver TV.

To feed the amplifier ANP with the applicable frequency power, for example, install a power supply inserter between branchers Q and Q, and connect cable K pulled out from this to the commercial power supply. This is done through the distributor and the coaxial cable connecting between them. This is done through the coaxial cable K connected to the distributor 1.

Next, FIG. 2 shows the appearance of the distributor 1.

In FIG. 2, 1A is a top casing and 1B is a bottom casing. These casings 1A, 1B are made of aluminum die-casting, for example. Note that the arrow at the tip of the leader line 1 indicates both the top casing 1A and the bottom casing 1B, that is, the entire distributor 1. Bottom casing 1B
is attached to the top casing 1 by a plurality of bolts 2.
It is attached to A. Connector connection holes 4A, 4B, 5A, and 5B to which connectors of coaxial cable K are connected are provided on the side surface of top casing 1A. The connector connection holes 4A and 5A are provided so that their axes intersect at 90 degrees,
Further, the connector connection holes 4B and 5B are provided so that their axes intersect at 90 degrees.
In addition, connector connection holes 4A and 4B and 5A and 5B
are provided at symmetrical positions on the top casing 1A, respectively.

Next, FIG. 3 shows a state in which the top casing 1A and the bottom casing 1B are separated and the insides of each are viewed.

As shown in Figure 3, connector connection holes 4A and 5
The position where the axes of A intersect, connector connection holes 4B and 5
Contact posts 6 are provided at respective positions where the axes of B intersect. contact post 6
is held between a holder 7 made of an insulator such as plastic, passed through a support protrusion 8 formed integrally with the top casing 1A, and further fixed with screws 9. Below the screw 9, there is a support protrusion formed integrally with the top casing 1A, into which the screw 9 is screwed. contact post 6
is connected to a female terminal 11 on a printed circuit board 10 attached to the bottom casing 1B with screws 9.

Since the coaxial cable K expands and contracts depending on the outside temperature, a force is applied to the contact post 6 to which the core wire of the coaxial cable K is connected in a horizontal direction, that is, in a direction perpendicular to the axis of the contact post 6. Then contact post 6
A horizontal force is applied to the female terminal 11 to which it is connected, and acts to push the terminal 11 apart. If the deformation of this terminal 11 is large and it cannot be restored,
Since poor contact with the contact post 6 will occur,
In the present application, the contact post 6 is held between the holders 7 so as not to move in the horizontal direction.

Area 1 surrounded by a dashed line on the printed circuit board 10
0A is an area where an electric circuit is made up of resistors, capacitors, coils, transistors, etc.

Next, FIGS. 4, 5, and 6 show the structure of the contact post 6 and the holder 7 that holds it.

The contact post 6 shown in FIG. 4 is used when the power supplied to the amplifier ANP through the coaxial cable K is relatively small.

In FIG. 4, 7A is an upper holder;
B is the lower holder. In addition, the upper holder 7A,
The positional relationship of the lower holder 7B is simply determined for convenience of explanation in FIG. 4, and in FIG. 6, the lower holder 7B is located above the upper holder 7A.

The main components of the contact post 6 are a core wire connection portion 6C to which the core wire of the connector is connected, a terminal portion 6A above this, and a bottom portion below the core wire connection portion 6C (slightly thinner than the core wire connection portion 6C). (part) 6B. These terminal portion 6A, core wire connection portion 6C, and bottom portion 6B are integrally formed. Core wire connection part 6C
The diameter is the largest, and the diameter becomes narrower in the order of the bottom portion 6B and the terminal portion 6A. The terminal portion 6A is a portion connected to the female terminal 11 shown in FIG. 3. The upper holder 7A is provided with a support hole 14A having a diameter large enough for the terminal portion 6A of the contact post 6 to pass through. Further, the lower holder 7B is provided with a support hole 14B having a diameter large enough for the bottom 6B of the contact post 6 to pass through. Connect the terminal part 6A to the support hole 1
4A and the bottom portion 6B through the support hole 14B, the contact post 6 is clamped. Each of the upper holder 7A and the lower holder 7B has an opening 17 through which the support protrusion 8 of the top casing 1A passes.
is formed.

As shown in FIG. 5, a step 17A is formed at the periphery of one opening 17 of the lower holder 7B.
The upper holder 7 should fit into this step 17A.
A protrusion 17B is formed on the periphery of the opening 17 of A. A protrusion 17B is formed on the periphery of the other opening 17 of the lower holder 17B, which is different from the above.
A step 17A is formed at the periphery of the other opening 17 of the upper holder 7A so as to fit therewith. Further, a projection 16A is formed on the flat portion of the upper holder 7A, and a hole 16B is formed in the lower holder 7B to fit with the projection 16A of the upper holder 7A. Further, a hole 15A is formed in the flat portion of the upper holder 7A at a position different from the projection 16A, and a projection 15B that fits into the hole 15A is formed in the lower holder 7B. The holes 15A and 16B are
It does not penetrate through the upper holder 7A or the lower holder 7B. Moreover, each of the upper holder 7A and the lower holder 7B has a
A pillar 21 is provided that defines the size of the window through which the core wire guide 12 is exposed. Pillar 2 of upper holder 7A
The top of 1's head is flattened, and there is a small protrusion 20
B is provided. A small hole 20A is formed at the top of the column 21 of the lower holder 7B so as to fit therein.

As mentioned above, the upper holder 7A and the lower holder 7
The upper holder 7A and the lower holder 7B are prevented from being separated even if a horizontal force is applied to the contact post 6 by fitting them at respective predetermined locations. .
Further, the holder 7 is fixed to the top casing 1A using a support protrusion 8 and a screw 9 so that the position where the contact post 6 is provided does not change. Attach holder 7 to top casing 1A
A screw 9 for attachment to the hole 18 is provided in the hole 18. In addition, as shown in FIG. 4, the upper holder 7
A. By providing a protruding guide 19 around the hole 18 on the outer surface of the lower holder 7B, the support protrusion 8 that should be under the hole 18 can be placed under the hole 18 when the holder 7 is attached to the top casing 1A. It makes it easy to guide.

Here, the structure of the contact post 6 will be explained using FIGS. 4 and 7.

FIG. 7 is a sectional view of the contact post 6, in which the upper stage a shows the contact post 6 for small current use, and the lower stage b shows the contact post 6 for large current use. The above-mentioned small current is up to about 60 VAC and 6 A, and the thickness φ of the terminal portion 6A is 4 mm.
The large current is up to about 60V AC and 10A, and the thickness of the terminal part 6A is 6mm.

As shown in the upper row a of FIGS. 4 and 7, among the side surfaces of the core wire connection portion 6C of the contact post 6
Core wire connection hole 6 through which the core wire (not shown) is passed
The periphery of D is a protrusion 6E that protrudes from the other side surface. The protruding portion 6E has a recessed step on its inner periphery. In order to fit into this step,
Core wire guide 12 made of an insulator such as plastic
The periphery of the through hole 12C on the back surface of the holder is made to protrude.
The width of the wire guide 12 is approximately the same as the diameter of the wire connecting portion 6C of the contact post 6. here,
The width of the fiber guide 12 is defined as the width that is perpendicular to the axis passing from the terminal portion 6A to the bottom 6B of the collect post 6 and the axis of the fiber connection hole 6D when the fiber guide 12 is attached to the fiber connection portion 6C. It is the width in the direction. The core wire guide 12 is formed so that the axis of the core wire connection hole 6D of the contact post 6 and the axis of the through hole 12C of the core wire guide 12 coincide with each other when the core wire guide 12 is attached to the protrusion 6E. A core contact adapter 13, which is connected by gripping the core of the connector of the coaxial cable K, is inserted into the core connection hole 6D through the through hole 12C of the core wire guide 12. By using the core wire contact adapter 13, the connection can be completed simply by pushing the core wire into the core wire guide 12 from the core wire guide 12 side, so that work efficiency is significantly improved. Core wire contact adapter 13
is fixed in the core wire connection hole 6D by a hexagon socket set screw 22. In addition, the core wire guide 12 is
Even if the core wire contact adapter 13 is not attached, it is formed to fit well into the protrusion 6E so that it will not fall off. However, in the small current contact post 6, the core wire contact adapter 13 is always inserted into the core wire connection hole 6D. The surface 12D of the wire guide 12 into which the wire is inserted is tapered, so that the wire can be easily inserted into the wire contact adapter 13.
I try to be guided by.

Next, a method of holding the large current contact post 6 will be explained using FIG.

FIG. 6 is a perspective view of the large current contact post 6 and the upper holder 7A and lower holder 7B that sandwich it.

As shown in FIG. 6, in the large current contact post 6, the terminal portion 6A is thicker than the bottom portion 6B. Terminal part 6A of contact post 6 for large current
The diameter of the bottom 6B of the contact post 6 for small current is
The diameter of the bottom portion 6B of the contact post 6 for large current is approximately the same as that of the terminal portion 6A of the contact post 6 for small current. In the contact post 6 for small current, the upper holder 7A is passed through the terminal part 6A, and the lower holder 7B is passed through the bottom part 6B, but in the contact post 6 for large current, the upper holder 7A is passed through the bottom part 6B. , the lower holder 7B is passed through the terminal portion 6A. Therefore,
In the case of the contact post 6 for small current, the upper holder 7A faces the printed circuit board 10, but in the case of the contact post 6 for large current, the lower holder 7B faces the printed circuit board 10. Note that the terminal portion 6A of the contact post 6 for large current is also connected to the printed circuit board 1.
I insert it into the female terminal 11 on the 0 and connect it.
The female terminal 11 at this time differs from the one shown in FIG. 3, and has a cylindrical portion connected to the terminal portion 6A, for example, like the terminal 16 shown in Publication of Utility Model Publication No. 18221/1983. use. Here, the seventh
The structure of the large current contact post 6 will be explained using the drawings.

As shown in the lower part b of FIG. 7, a core wire guide 12 is attached to the large current contact post 6 as well, so that the core wire can be easily inserted.
A hexagon socket set screw 22 is provided in the terminal portion 6A of the contact post 6, and the core wire contact adapter 13 is fixed with this screw.

The large current contact post 6 is used when feeding large power to the amplifier ANP through the coaxial cable K, but when the feeding power is relatively small (about 60 VAC, 10 A).
When connecting the core wires with the core wire contact adapter 13 and supplying particularly large current (about 60 VAC, 15 A), remove the core wire contact adapter 13 and connect the core wires with the straight hexagon socket set screw 22. Connect to the core wire connection section 6C.

Next, the contact post 6 can be rotated 90 degrees while being held between the upper holder 7A and the lower holder 7B, whether for large current use or small current use, and can be stopped at a predetermined position. This will be explained using FIGS. 3, 5, and 8 to 10.

FIG. 8 is a perspective view for explaining that the contact post 6 can be rotated 90 degrees while being held between the upper and lower holders 7A and 7B, and is a perspective view of the lower holder 7B when the contact post 6 is placed. In order to make the structure easier to understand, the upper holder 7A is removed from the illustration.

FIG. 9 is a perspective view of a stopper for stopping the contact post 6 at a predetermined position, and FIG. 10 is a perspective view of the core wire guide 12 viewed from the back side, that is, the side to be fitted to the contact post 6. .

As shown in Fig. 8, the contact post 6
can be rotated almost 90 degrees. That is, when the contact post 6 is attached as shown in FIG. 3, if it is the contact post 6 on the right side, by rotating it, for example, the fiber guide 12 and the core that are peeking out from the connector connection hole 4A can be removed. The line contact adapter 13 comes to be seen through the connector connection hole 5A. As shown in FIG. 5, the ends 24A ₁ , 24A ₂ , 24B ₁ , 24B ₂ of the sliding surfaces 24 of the upper and lower holders 7A, 7B on which the protrusion 6E of the contact post 6 slides are It has a radius of curvature that is approximately the same as the radius of the outer circumferential circle of the protrusion 6E. Each of the upper holder 7A and the lower holder 7B is provided with one stopper 23 at a position shifted by 90 degrees from each other for stopping the rotation of the contact post 6 at a predetermined position. The stopper 23 is formed integrally with the holders 7A and 7B. 25 is contact post 6
This groove is provided to allow the core wire guide 12 to move smoothly without falling off during rotation. This groove 25 is also formed in the upper holder 7A at a similar position. Here, the stopper 23 of the lower holder 7B
is shown enlarged in FIG. In addition, the upper holder 7A
The stopper 23 also has the same structure as the stopper 23 shown in FIG. As shown in Figure 9,
The stopper 23 is formed into a plate shape having a semi-cylindrical projection 23A, and is provided approximately at the boundary between the groove 25 and the region A formed by cutting out a part of the sliding surface 24. The protruding guide rail 12B of the core wire guide 12 is inserted into the groove 25. Groove 2
The width of the contact post 5 is made wider than the thickness of the guide rail 12B, so that the contact post 6 can rotate smoothly while the guide rail 12B is not hanging on the stopper 23. A V-shaped groove 12A is formed on the back surface of the core wire guide 12 and has a width and depth that are just wide enough for the protrusion 23A of the stopper 23 to fit into.
is formed.

When the core wire guide 12 that has moved above the groove 25 hangs on the stopper 23 by rotating the contact post 6, the guide rail 12B is moved between the protrusion 23A of the stopper 23 and the outer wall of the groove 25. Due to competition, resistance increases. As the contact post 6 is rotated against this resistance, the protrusion 23A enters the groove 12A, so that the resistance suddenly disappears, indicating that the contact post 6 has been rotated to a predetermined position. In addition, since the stopper 23 is formed into a plate shape, appropriate elasticity can be obtained, and the resistance applied to the core wire guide 12 when the contact post 6 is rotated is also appropriate. Also, when the contact post 6 rotates to a predetermined position, the protrusion 2 of the stopper 23
When the wire 3A falls into the groove 12A of the fiber guide 12, it makes a "snapping" sound, making it clear that it has arrived at the predetermined position. Although FIG. 8 shows the contact post 6 for small current, the contact post 6 for large current is also similar to the stopper 2 provided on the upper holder 7A and the lower holder 7B.
3 and the groove 12A of the core wire guide 12, the predetermined position can be clearly identified.

Figure 5 and the contact post 6 are attached to the upper holder 7.
As shown in FIG. 11, which is a side view of the contact post 6 when it is held between the contact post A and the lower holder 7B.
When the wire guide 1 is rotated to the specified position,
A depression 26 is formed in each side surface of the upper holder 7A and the lower holder 7B, which face the side surface of the upper holder 7A and the lower holder 7B. Thereby, an appropriate space 27 is formed between the core wire guide 12 and the holder 7, such that the tip of a flathead screwdriver can fit therein. Insert the tip of the screwdriver into this space 27 and insert the core wire guide 12.
By prying the contact post 6, which has been stopped by the stopper 23, can be easily rotated.

On the other hand, a pillar 21 is provided on each of the upper holder 7A and the lower holder 7B, and when the contact post 6 is rotated until it is stopped by the stopper 23, the size of the window in which the wire guide 12 appears is determined by the wire guide 1.
It is about the same as 2. In other words, pillar 21 is
When inserting the core wire of the connector into the core wire contact adapter 13, the core wire of the connector may be accidentally inserted into the core wire contact adapter 1.
3 and the core wire guide 12 to prevent it from entering other parts of the holder 7.

Next, the connection state of the core wires in the large current contact post 6 will be explained.

FIG. 12 is a sectional view showing a cross section when the connector of the coaxial cable K is connected to the connector connection hole 4A of the top casing 1A.

Although not shown in FIG. 12, the holder 7
is fixed to the casing 1A by support protrusions 8 and screws 9 (see FIG. 3). The distance from the holder 7 to the end of the connector connection hole 4A is determined so that the core wire 28 reaches the hexagon socket set screw 22 of the contact post 6. This is used when supplying large current to the core contact adapter 1.
3 is removed and the core wire 28 is directly attached to the contact post 6 with the set screw 22. Even when using the contact post 6 for large currents, when the power supply current is relatively small, by using the core contact adapter 13,
The connection is completed simply by pushing it into the core wire 28. Further, the core wire insertion hole (not labeled) of the core wire contact adapter 13 is provided with sufficient depth to prevent the core wire 28 from bottoming out. Therefore, although the core wire insertion hole is a through hole in FIG. 12, the length of the core wire contact adapter 13 is long and the depth of the core wire insertion hole is sufficient to prevent the core wire 28 from bottoming out. As long as it is deep, it does not need to be a through hole. Even when the wire contact adapter 13 is not used, the wire guide 12 is fitted into the wire connecting portion 6C of the contact post 6 and is held well.

Here, FIG. 13 shows the cross-sectional shape of the core wire contact adapter 13 when the core wire 28 is not inserted.

In Figure 13, the L ₁ part is the set screw 22.
The part that is pressed down is made thicker to provide sufficient mechanical strength. A thinner portion _L2 is provided beyond this _L1 , that is, in the direction where the core wire 28 is inserted. Thereby, good springiness is obtained and the core wire 28 is reliably gripped. In order to give the part L ₂ a spring characteristic, the tip is concave, so the diameter D ₂ of the tip of the core wire insertion hole when the core wire 28 is not inserted is the center of the thick part L ₁ . It is smaller than the diameter D ₁ of the wire insertion hole.
On the other hand, the end surface 13A of the core wire contact adapter 13 into which the core wire 28 is inserted is tapered to facilitate insertion of the core wire 28.

In the top casing 1A shown in FIG. 2, four connector connection holes 4A, 4B, 5A, and 5B are provided, but in some cases, the ones to be used are predetermined, for example, 5A and 5B. In this case, no holes are formed in the connector connection holes 4A and 4B. Therefore, contact post 6
It is preferable to fix the cable facing the connector connection hole 5A or 5B so that it does not turn toward the connector connection hole 4A or 4B due to a mistake during the wire connection. Therefore, in the present application, as shown in FIG.
By providing a semicircular recess 29 in B and using a core wire contact adapter 13 that is long enough that its rear end protrudes when inserted into the contact post 6, unlike the core wire contact adapter 13 described above, The tip is hung in the recess 29. As shown in FIG. 5, the recess 29 is provided in both the upper holder 7A and the lower holder 7B, and by aligning the upper and lower parts, the core wire contact adapter 13 protrudes from the contact post 6.
It wraps around the rear end of the.

As explained above, according to the contact post 6 and holder 7 of this embodiment, the following effects can be obtained.

(1) Support holes 14A and 14B are provided through which the contact posts 6 of the upper and lower holders 7A and 7B are passed, and the diameter of the support hole 14A is made smaller than the diameter of the support hole 14B. The diameter of the terminal portion 6A is the same as that of the upper holder 7A.
The diameter of the bottom part 6B is made to be the same as that of the support hole 14A of the lower holder 7B.
The diameter of the bottom part 6B is set to be the same as that of the support hole 14B of the lower holder 7B, and the diameter of the bottom part 6B is set to be the same as that of the support hole 14B of the lower holder 7B.
By making it the same as the support hole 14A of A,
Upper holder 7A of contact post 6 for small current
becomes the lower holder of the contact post 6 for large current, and the lower holder 7B of the contact post 6 for small current becomes the upper holder of the contact post 6 for large current, so one holder 7 can support multiple types of contact posts 6. can do.

(2) By making the width of the conductor guide 12 the same as that of the contact post 6 and fitting it into the conductor connection portion 6C of the contact post 6, the wire guide 12 is installed by fitting into the conductor connecting portion 6C of the contact post 6. Since the area occupied by them becomes very small, the holder 7 can be made smaller. Therefore, the distributor 1 can also be made smaller.

(3) In the contact post 6 for high current, the position of the contact post 6 in the top casing 1A is determined so that the core wire 28 of the connector can reach the set screw 22 in the core wire connection part 6C, so that power can be supplied. When the current is relatively small, the connection can be completed simply by providing the core wire contact adapter 13 in the core wire connection part 6C and pushing the core wires 28 into the core wire contact adapter 13, thereby improving work efficiency. , when the power supply current is large, remove the core contact adapter 13 and tighten the set screw 2.
Since the core wire 28 can be connected with the wire 2, the core wire 28 and the contact post 6 can be connected well. That is, the method of connecting the core wires 28 can be changed depending on whether the feeding current is relatively small or large.

(4) Set screw 22 of core wire contact adapter 13
The wall thickness of the part pressed by is made thicker,
By reducing the thickness of the part that grips the core wire 28 beyond this point, the core wire contact adapter 1
3 to the contact post 6 with the setscrew 22, and the connection of the core wire 28 is improved by increasing the springiness of the part that grips the core wire 28. can be increased.

Although the present invention has been specifically explained above based on the embodiments, it goes without saying that the present invention is not limited to the above embodiments and can be modified in various ways without departing from the gist thereof.

For example, although the foregoing embodiments have been described with respect to a splitter, it goes without saying that the present invention can be similarly applied to distributors and amplifiers.

[Effect of idea]

Among the devices disclosed in this application, the effects of typical ones are briefly explained below.

The upper holder of the small current contact post becomes the lower holder of the large current contact post, and the lower holder of the small current contact post becomes the lower holder of the large current contact post, so one holder can handle multiple types of contact posts. can correspond to In other words, it is compatible with multiple types of contact posts, and parts can be shared.

In addition, by fitting the contact post and the upper and lower holders through the support holes, the contact post can rotate but is held so that it does not move forward, backward, left, or right, making the connection between the contact post and the female terminal easier. can be performed well.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the network from the antenna to the receiver, Figure 2 is an external view of the distributor, and Figure 3 is a schematic diagram of the network from the antenna to the receiver.
The figures are a perspective view and a plan view showing the inside of the top casing and bottom casing, Figure 4 is a perspective view of the upper holder and lower holder when holding a small current contact post, and Figure 5 is the upper holder. and a perspective view showing the inside of the lower holder, Figure 6 is a perspective view of the upper holder and lower holder when holding a large current contact post, and Figure 7 is a small current contact post and a large current contact. 8 is a perspective view showing the rotation angle of the contact post, FIG. 9 is a perspective view of the stopper, FIG. 10 is a perspective view of the wire guide, and FIG. 11 is a perspective view of the contact post. 12 is a sectional view for explaining the mounting position of the contact post in the top casing, FIG. 13 is a sectional view of the core wire contact adapter, and FIG. 14 is a sectional view of the lower holder. FIG. In the figure, 1...distributor, 1A...top casing, 1B...bottom casing, 2...bolt,
3...Distribution terminal, 4A, 4B, 5A, 5B...Connector connection hole, 6...Contact post, 6A...
...terminal section, 6B...bottom, 6C...core wire connection section,
6D... Core wire connection hole, 6E... Projection, 7,7
A, 7B...Holder, 8...Support protrusion, 9...Screw, 10...Printed circuit board, 10A...Circuit area, 11...Female terminal, 12...Wire guide, 1
2A...Groove, 12B...Guide rail, 13...
Core wire contact adapter, 14A, 14B... Support hole, 22... Hexagon socket set screw, 23... Stopper, 25... Groove for inserting the core wire guide, 26...
Recess in side wall of holder, 27... Space, 28... Core wire, 29... Recess in holder.

Claims (1)

[Scope of utility model registration request] A contact post is provided in the casing of a public listening device that amplifies, branches, or distributes signal current such as a television signal, and is connected to the core wire of a connector of a coaxial cable that simultaneously carries signal current and power supply current; In the contact post holder in which the contact post is supported by an upper holder and a lower holder and installed in a casing, the upper holder and the lower holder have different diameters in the portions of the upper and lower holders that support the contact posts. A penetrating support hole is provided, and among the contact posts, the first type contact post has a terminal portion having a diameter comparable to that of the support hole of the upper holder;
The diameter of the bottom part is made to be approximately the same as the support hole of the lower holder. Further, the second type of contact post is characterized in that the diameter of the terminal portion is made approximately the same as the support hole of the lower holder, and the diameter of the bottom portion is made approximately the same as the support hole of the upper holder. post holder.