JP5037799B2 - TV outlet - Google Patents

Description

  The present invention relates to a television outlet that connects a signal transmission system such as a bidirectional CATV wiring system to a receiving device such as a television receiver or a tuner or an information terminal such as a cable modem.

  In general, in a bidirectional CATV signal transmission system, a signal corresponding to a downlink direction from a CATV station to a subscriber and a signal corresponding to an uplink direction opposite to the CATV station are separated by a frequency band. Two-way communication is performed with a coaxial cable. If noise or the like is mixed into the upstream signal from the subscriber side, an effect such as deterioration in communication performance occurs. For this reason, when performing only one-way communication only in the downlink direction, a TV outlet provided with a terminal serving as a terminal of the signal transmission system is provided with a filter that cuts a signal in a frequency band corresponding to the uplink direction. ing.

  Among such television outlets, there is known a television outlet that can select whether to apply a filter by a switch and select whether to perform two-way communication or one-way communication. Moreover, as a television outlet capable of selecting bidirectional / one-way, for example, as shown in Patent Document 1, there are two television terminals, and each of these television terminals is for bidirectional communication or one-way communication. Some of them have two changeover switches.

  6A, 6B, and 6C show an example of a television outlet described in Patent Document 1 described above. A first television terminal 82a and a second television terminal 82b are provided on the upper and lower portions of the front surface of the housing 810 of the television outlet 81, respectively. Further, the upper portion of the housing 810 has a shape protruding rearward from the back surface of the portion where the opening is provided as described later, and the input terminal 82c faces downward on the lower surface of the rearward protruding portion. It is erected so as to be exposed. In the vicinity of the second television terminal 82b on the front surface of the housing 810, two changeover switches (hereinafter referred to as switches) are provided so that they can be operated from the outside through the operation holes 83 provided in the housing 810. 84 is provided. As shown in FIG. 6A, these two switches 84 are provided substantially in parallel with each other. A portion of the housing 810 between the first television terminal 82a and the operation hole 83 is formed so that the dimension in the width direction is narrowed. The input terminal 82c is provided behind the space 810e generated when the widthwise dimension of the housing 810 is narrowed.

  FIG. 7 shows the filter circuit board 86. An opening is provided below a portion protruding rearward of the back surface of the housing 810, and the filter circuit board 86 is disposed inside the housing 810 through the opening. The opening of the housing 810 is sealed by press-fitting a sealing plate 811b in a state where the filter circuit board 86 is arranged inside the housing 810. The filter circuit board 86 includes a filter 88 connected between the input terminal 82c and the first television terminal 82a and the second television terminal 82b. The switch 84 switches between bidirectional communication and unidirectional communication by switching whether to apply the filter 88.

  As shown in FIGS. 8A and 8B, the TV outlet 81 has the front surface of the housing 810 covered with a cover 820, and the cover 820, the first TV terminal 82a, and the second TV are provided indoors. It is used by being arranged on the wall surface 890 so that the terminal 82b is exposed. An outlet box 880 is provided behind the TV outlet 81. The TV outlet 81 is arranged on the wall surface 890 with the terminal 861 at the end of the coaxial cable 860 arranged in the outlet box 880 from the back side of the wall surface 890 connected to the input terminal 82c. Generally, the coaxial cable 860 is bent into a substantially U shape inside the outlet box 880, and the terminal 861 is connected upward to the input terminal 82c protruding downward from the housing 810.

  Incidentally, in recent years, in order to reduce the influence on the environment after disposal, a coaxial cable using a non-halogen resin such as polyethylene as an insulating material has been put into practical use. Such a non-halogen resin is harder than the conventional one, and the coaxial cable 860 itself is difficult to bend when the TV outlet 81 is disposed on the wall surface 890. Further, the length of the terminal 861 may be long, and it may be difficult to bend the coaxial cable 860 in the outlet box and connect it to the input terminal 82c from below. In such a case, as shown in FIG. 9, the TV outlet 81 may be used as the direction in which the input terminal 82c is erected upward from the housing 810 with the vertical direction of the TV outlet 81 reversed from the normal direction. .

  However, when the TV outlet 81 is used with the vertical direction reversed as described above, when condensation occurs in the coaxial cable 860, the condensed water droplets are transmitted along the coaxial cable 860 and the like, and are located behind the housing 810. It may fall on the surface where the protruding input terminal 82c is provided. Water drops that have fallen on the surface may flow into the housing 810 through the gap between the opening of the housing 810 and the sealing plate 811b, and adhere to the filter circuit board 86 and the like inside the television outlet 81. May cause malfunction or failure.

As a television outlet that prevents water droplets condensed on the coaxial cable from entering the inside of the housing, for example, as described in Patent Document 2, a changeover switch is provided on the upper surface of the housing where the input terminal is provided. Some of them are provided with a groove that prevents water droplets from flowing into the inside of the housing from the arranged holes. However, this television outlet can prevent water droplets flowing from the changeover switch, but cannot prevent water droplets from flowing into the opening for arranging the filter circuit board 86 as described above.
JP 2002-171180 A JP 2002-134217 A

  The present invention has been made in view of the above problems, and even when condensation occurs on the coaxial cable when the TV outlet is used upside down, a water droplet is provided at the input terminal of the housing. An object of the present invention is to provide a television outlet capable of preventing malfunction and failure by having a drip-proof structure that does not flow into the opening from the surface on which it is placed.

In order to achieve the above object, a first television terminal and a second television terminal provided so as to be exposed from the front surface of the housing, and a rear surface of the housing so as to be exposed outside the housing. And an input terminal connected to the coaxial cable is formed in the casing, housed in the casing, and connected to the input terminal to distribute the signal sent via the coaxial cable to 2 Unlike the first path, the two distribution circuit board having the distribution circuit, the first distribution path for connecting the two distribution circuits and the first television terminal so that the signal can be transmitted, and the second distribution circuit A filter circuit board housed inside the housing, having a second path for connecting the television terminal to the signal terminal so that the signal can be transmitted, and a filter that can be inserted into each of the first and second paths. And provided on the front surface of the housing to be operable from the outside. A first changeover switch connected to a first path for switching the first television terminal between bidirectional communication and unidirectional communication depending on whether or not the filter is inserted into the first path; The second television terminal is provided on the front face so as to be operable from the outside, is connected to the second path, and switches the second television terminal between the two-way communication and the one-way communication depending on whether the filter is inserted into the second path. The first change-over switch and the second change-over switch are both disposed in the vicinity of either the first TV terminal or the second TV terminal, and the housing Is a portion between a portion where the other of the first TV terminal or the second TV terminal is provided and a portion where the first changeover switch and the second changeover switch are provided. The portion in which the dimension in the width direction is narrowed, and the portion where the two distribution circuit boards are housed is a shape protruding rearward from the back of the portion where the filter circuit board is provided, and this In a television outlet in which the back surface of the part where the filter circuit board is provided is an opening, the input terminal is on the outer surface of the part where the two distribution circuit boards are housed and from one to the other It is erected on a step provided in a shape that is recessed in the direction or the direction from the other to the other ,
The step portion is formed so as to be inclined to fall outward rather than the horizontal plane when the television outlet is used with the up and down direction reversed .

According to the invention of claim 1, the input terminal is erected on a stepped portion provided in a shape recessed from one side to the other side or from the other side to the one side on the outer surface of the portion protruding rearward of the housing. Therefore, even when condensation occurs on the coaxial cable when the TV outlet is used upside down, the water droplets fall on the stepped portion. Even if water droplets accumulate on the stepped portion, if the waterdrop overflows from the range of the stepped portion, it drops downward before flowing into the opening due to surface tension. Accordingly, water droplets do not flow into the opening from the surface of the housing where the input terminal is provided, and it is possible to prevent malfunction and failure of the television outlet. In addition, by forming the step portion so as to be inclined to the outside, which is below the housing, without forming a horizontal plane, it is possible to reliably remove water droplets early.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIGS. 1A, 1B, and 2 show a television outlet according to the present embodiment. FIG. 2 shows a television outlet in a state where a sealing plate 11b described later is not attached. A first television terminal 2 a and a second television terminal 2 b are respectively provided on the upper and lower portions of the housing 10 of the television outlet 1 so as to be exposed from the front surface of the housing 10. An input terminal 2 c connected to a coaxial cable (not shown) is provided on the back side of the housing 10 so as to be exposed to the outside of the housing 10. The first television terminal 2a, the second television terminal 2b, and the input terminal 2c are terminals of an F-type connector, for example. In the vicinity of the second television terminal 2b on the front surface of the housing 10, two operation holes 3a and 3b are provided. A first changeover switch (hereinafter referred to as a first switch) 4a, a second changeover switch (hereinafter referred to as a “first switch”) is provided inside the housing 10 so as to be operable from outside the housing 10 through the operation holes 3a and 3b. (Hereinafter referred to as a second switch) 4b. Inside the upper part of the housing 10, a 2-distribution circuit board 5 having a 2-distribution circuit that is connected to the input terminal 2c and distributes a signal transmitted via a coaxial cable into two is accommodated substantially horizontally. A filter circuit board 6 for transmitting the distributed signal to the first television terminal 2 a and the second television terminal 2 b is accommodated substantially vertically below the two distribution circuit boards 5. The television outlet 1 is used by being attached to, for example, an indoor wall surface in a state where a coaxial cable is connected to the input terminal 2c.

  The housing 10 is formed of metal such as die casting. As shown in FIG. 1B, the portion of the housing 10 in which the two distribution circuit boards 5 are housed has a shape protruding rearward from the back of the portion where the filter circuit board 6 is provided. Moreover, the upper surface of the housing | casing 10 and the back surface of the site | part in which the filter circuit board 6 is provided are the opening parts 10a and 10b open | released outside, respectively. The openings 10a and 10b are covered with sealing plates 11a and 11b, respectively. In the present embodiment, as shown in FIG. 2, a portion of the portion protruding rearward of the housing 10 near the side surface of the lower surface 10 c is recessed above the lower surface 10 c (from one to the other). A step 10d having a shape is provided. The input terminal 2c is erected from the step portion 10d downward (in the direction from the other side to the other side).

  Further, in the present embodiment, as shown in FIG. 1A, the portion between the first television terminal 2a and the operation holes 3a and 3b of the housing 10 is formed so that the dimension in the width direction becomes narrow. The left and right sides of the part are spaces 10e. The housing 10 is formed in a shape that makes this space 10e large, and thereby, a wide space is secured around the input terminal 2c, and a coaxial cable can be easily connected to the input terminal 2c. Yes.

  As shown in FIG. 1A, the operation hole 3a is disposed closer to the first television terminal 2a than the operation hole 3b, and the operation hole 3b is closer to the second television terminal 2b than the operation hole 3a. It is arranged at a close position. That is, the first switch 4a and the second switch 4b are both provided in the vicinity of the second television terminal 2b, and the first switch 4a is more first than the second switch 4b. The second switch 4b is disposed closer to the second television terminal 2b than the first switch 4a. The first switch 4a and the second switch 4b are, for example, slide-type switches, and are arranged so as to be able to be switched in the vertical direction through the operation holes 3a and 3b in the present embodiment.

  As described above, the two-distribution circuit board 5 is accommodated in the space inside the portion protruding to the rear of the upper portion of the housing 10, and is connected to the input terminal 2c. The 2-distribution circuit board 5 has a 2-distribution circuit (not shown), and the 2-distribution circuit distributes the signal input from the input terminal 2c via the coaxial cable into two.

  3A and 3B show the filter circuit board 6. The filter circuit board 6 is a double-sided pattern board, and has a shape in which a square shape is dropped corresponding to the internal shape of the casing 10. It is stored parallel to the front. The filter circuit board 6 includes a first path 7a and a second path 7b, a filter 8 that can be inserted into each of the paths 7a and 7b, and the first switch 4a and the second switch 4b described above. The switch connection portions 41a and 41b are connected to each other. The first television terminal 2 a and the second television terminal 2 b and the two distribution circuits on the two distribution circuit substrate are connected to the filter circuit substrate 6. The first and second paths 7a and 7b connect the first television terminal 2a and the second television terminal 2b to the two distribution circuits of the two distribution circuit board 5 so that signals can be transmitted. . The switch connecting portions 41a and 41b are arranged in the middle of the first and second paths 7a and 7b, respectively. When the switches 4a and 4b are switched, the filter 8 is inserted into the first and second paths 7a and 7b. Whether or not to be switched is configured.

  The filter 8 is a band rejection filter that removes the component of the frequency band corresponding to the upward direction from the subscriber (user) side toward the CATV station side from the CATV signal. When the filter 8 is inserted into the first and second paths 7a and 7b, the first TV terminal 2a and the CATV signal transmitted through the first and second paths 7a and 7b A signal in a frequency band corresponding to the upward direction from the second television terminal 2b toward the input terminal 2c is cut. Therefore, the first and second paths 7a and 7b are unidirectional capable of passing only signals in the frequency band corresponding to the downstream direction from the input terminal 2c toward the first TV terminal 2a and the second TV terminal 2b. This is a communication path. When the filter 8 is not inserted into the first and second paths 7a and 7b, the first and second paths 7a and 7b are paths for bidirectional communication. That is, as described above, when the first switch 4a or the second switch 4b is switched and whether or not the filter 8 is inserted into the first and second paths 7a and 7b, respectively, the first television terminal For 2a and the second television terminal 2b, the setting for bidirectional communication or one-way communication is switched. In the present embodiment, the switching operation between the bidirectional communication and the unidirectional communication for each of the first television terminal 2a and the second television terminal 2b is performed from the outside of the housing 10 by the first switch 4a. Alternatively, it is performed by switching the bidirectional / one-way setting of the second switch 4b. This operation can be performed in a state where the TV outlet 1 is installed on a wall surface or the like.

  Here, the TV outlet 1 is used, for example, attached to a wall surface or the like so that the first TV terminal 2a is on the upper side and the second TV terminal 2b is on the lower side. It can also be attached. That is, the television outlet 1 can be used by connecting the coaxial cable to the input terminal 2c from above so that the direction in which the input terminal 2c is erected is upward. Thus, when the television outlet 1 is installed, the stepped portion 10d of the housing 10 is in a state of being recessed below the lower surface 10c of the portion protruding to the rear of the housing 10.

  As described above, when the TV outlet 1 is used upside down, if condensation or the like occurs in the coaxial cable, the condensed water droplets travel along the coaxial cable, and the step 10d provided with the input terminal 2c. fall into. At this time, since the lower surface 10c of the portion protruding rearward of the housing 10 is above the step portion 10d, even if water droplets accumulate on the lower surface 10c, the water drops are within the range of the step portion 10d and from the range of the step portion 10d. If it overflows, it drops downward before flowing into the opening 10b due to surface tension. Therefore, this water droplet does not flow into the opening 10b from the lower surface 10c of the portion protruding to the rear of the housing 10, and it is possible to prevent malfunction or failure of the television outlet. In addition, the step portion 10d may be formed so as to be inclined to be inclined downward toward the lower side of the housing 1 without forming a horizontal plane. By forming the step portion 10d in this manner, water droplets are surely removed early. It becomes possible to do.

  FIG. 4 shows a television outlet according to the second embodiment of the present invention. In each of the following embodiments, components similar to those in the above-described embodiment are denoted by the same reference numerals, and only portions different from those in the above-described embodiment will be described. In the present embodiment, the television outlet 1 has a groove 110d on the lower surface 10c of the portion protruding rearward of the housing 10 in place of the step 10d described above, and the other components of the television outlet 1 are as follows. This is the same as in the first embodiment described above. FIG. 4 shows the television outlet 1 in a state where the sealing plate 11b is not attached.

  As shown in the figure, the groove portion 110d is provided between a portion where the input terminal 2c of the lower surface 10c of the portion protruding rearward of the housing 10 is erected and a portion near the opening 10b. The groove 110 d is formed so as to communicate with the outer surface of the housing 10.

  Also in the present embodiment, as in the first embodiment described above, the TV outlet 1 is connected to the input terminal 2c from the upper side with the coaxial cable connected to the input terminal 2c so that the direction in which the input terminal 2c is erected is upward. Can be used. At this time, the groove 110 d is in a state of being recessed below the lower surface 10 c of the portion protruding to the rear of the housing 10. Here, when condensation or the like occurs in the coaxial cable, the condensed water droplets travel along the coaxial cable and fall to the lower surface 10c on which the input terminal 2c is provided. When the amount of water droplets falling on the lower surface 10c increases, the water droplets flow through the groove portion 110d and flow to the outer surface of the housing 10, so even if water droplets accumulate on the lower surface 10c, they cannot reach the opening portion 10b. Is not reached. Therefore, water droplets do not flow into the opening 10b from the lower surface 10c of the portion protruding to the rear of the housing 10, and it is possible to prevent malfunction and failure of the television outlet 1.

  FIG. 5 shows a television outlet according to the third embodiment of the present invention. In each of the following embodiments, components similar to those in the above-described embodiment are denoted by the same reference numerals, and only portions different from those in the above-described embodiment will be described. In the present embodiment, a sill portion 210d is provided on the lower surface 10c of the portion of the TV outlet 1 that protrudes behind the housing 10, and the above-described step portion 10d is not provided. Other components of the television outlet 1 are the same as those in the first embodiment. 5 shows the television outlet 1 in a state where the sealing plate 11b is not attached.

  As shown in the figure, the sill portion 210d is formed integrally with the housing 10 so as to block a portion of the opening 10b on the lower surface 10c side with a lower surface 10c of a portion protruding rearward of the housing 10. Note that the sill portion 210d is not limited to be provided so as to block the portion of the opening 10b on the lower surface 10c side, and for example, the input terminal 2c of the lower surface 10c is surrounded by the portion of the opening 10b on the lower surface 10c side. The screen-like thing standing upright between the site | part provided and the opening part 10b may be sufficient.

  Also in this embodiment, as in the first and second embodiments described above, the coaxial outlet is connected to the TV outlet 1 from above so that the direction in which the input terminal 2c is erected is upward. It is possible to connect to and use. At this time, if condensation or the like occurs in the coaxial cable, the condensed water droplets may travel along the coaxial cable, and may fall and accumulate on the lower surface 10c on which the input terminal 2c is provided. Here, the water droplets accumulated on the lower surface 10c are blocked by the sill portion 210d and do not flow to the opening 10b side than the sill portion 210d. Therefore, water droplets do not flow into the opening 10b from the lower surface 10c of the portion protruding to the rear of the housing 10, and it is possible to prevent malfunction and failure of the television outlet 1.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible suitably in the range which does not change the meaning of invention. For example, the television outlet 1 may be such that an output terminal for feed wiring is provided on the back side of the housing 10 in addition to the input terminal 2c. At this time, for example, the output terminal is configured to stand upright from the stepped portion 10d as described above similarly to the input terminal 2c, so that the coaxial cable can be used when the TV outlet 1 is used upside down. Even if condensation or the like occurs, water droplets do not flow into the opening 10b, and it is possible to prevent malfunction and failure of the TV outlet 1.

(A) is a front view which shows the television outlet concerning the 1st Embodiment of this invention, (b) is a sectional side view which shows the television outlet. The perspective view which shows a television outlet socket same as the above. (A) is a front view which shows the filter circuit board of a television outlet same as the above, (b) is a rear view which shows the filter circuit board. The perspective view which shows the television outlet concerning the 2nd Embodiment of this invention. The perspective view which shows the television outlet socket which concerns on the 3rd Embodiment of this invention. (A) is a front view which shows an example of the conventional television outlet, (b) is a side view which shows the television outlet, (c) is a perspective view which shows the television outlet. The top view which shows the filter circuit board of a television outlet same as the above. (A) is a front view when a cover is placed on the TV outlet, and (b) is a view showing the TV outlet installed on a wall surface. The figure which shows when a television outlet same as the above is installed on a wall surface upside down from the normal direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Television outlet 2a 1st television terminal 2b 2nd television terminal 2c Input terminal 4a 1st changeover switch 4b 2nd changeover switch 5 2 division circuit board 6 Filter circuit board 7a 1st path | route 7b 2nd path | route 8 Filter 10 Housing 10b Opening 10c Bottom 10d Step 110d Groove 210d Sill

Claims (1)

A first TV terminal and a second TV terminal provided so as to be exposed from the front surface of the housing;
An input terminal that is arranged on the back side of the casing so as to be exposed to the outside of the casing and is connected to the coaxial cable is formed on the casing.
A 2-distribution circuit board having a 2-distribution circuit that is housed in a housing and that is connected to the input terminal and that distributes a signal that is sent via the coaxial cable into two;
A first path connecting the two distribution circuits and the first television terminal so that the signal can be transmitted, and unlike the first path, the signals can be transmitted between the two distribution circuit and the second television terminal. A filter circuit board housed in the housing, having a second path connected to the filter, and a filter that can be individually inserted into each of the first and second paths,
The first television terminal is switched between bidirectional communication and unidirectional communication depending on whether or not the filter is inserted into the first path. A first changeover switch for the first television set and an externally operable front face of the housing, connected to a second path, and whether or not the filter is inserted into the second path. A second switch for switching between one-way communication and one-way communication,
The first changeover switch and the second changeover switch are both disposed in the vicinity of either the first TV terminal or the second TV terminal,
The housing has a portion between a portion where the other of the first TV terminal or the second TV terminal is provided and a portion where the first changeover switch and the second changeover switch are provided. Molded so that the width dimension is narrow,
The portion where the two distribution circuit boards are housed has a shape protruding rearward from the back of the portion where the filter circuit board is provided, and the back of the portion where the filter circuit board is provided is open. In the TV outlet that is
The input terminal is erected on a stepped portion provided on the outer surface of a portion in which the two distribution circuit boards are accommodated and recessed in a direction from one to the other or in the direction from the other to the other. It is,
The stepped portion is formed so as to be inclined so as to incline to the outside below the casing instead of a horizontal plane when the television outlet is used with its upside down direction. .

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