JP4285190B2 - TV outlet - Google Patents

Description

  The present invention relates to a television outlet for connecting the wiring system to a receiving device such as a television receiver or a tuner at the end of the wiring system for transmitting broadcast waves.

  In recent years, in CATV (cable television), not only a program is transmitted from a CATV station to a CATV subscriber, but also an interactive system capable of transmitting data and the like from the CATV subscriber to the CATV station has been developed. In this bi-directional CATV system, the noise (joining noise) from each subscriber terminal unit joins at the CAVT station via the uplink (the line from the CATV subscriber to the CATV station). As a result, the CATV station determines the uplink signal. It becomes difficult. Therefore, the TV outlet on the CATV subscriber side is provided with a changeover switch for switching the pass frequency band, and is configured to cut the upstream band when it is not desired to use the bidirectional CATV system.

  FIG. 5 is an overview of a conventional television outlet. FIG. 5A is a top view and FIG. 5B is a side view. FIG. 6 is a circuit diagram showing a pass frequency band variable circuit. FIG. 6A is an overall circuit diagram, and FIG. 6B is a circuit diagram of a high-pass filter. FIG. 7 is a diagram for explaining a state in which the television outlet is attached. FIG. 8 is a diagram for explaining a use state of the television outlet.

  In FIG. 5, a TV outlet 100 includes an input terminal 102 connected to a coaxial cable 106 of a wiring system for transmitting broadcast waves to a casing 101 having a substantially rectangular parallelepiped shape made of metal, for example, a television receiver, a tuner, and the like. A television terminal 103 connected to the receiver, a changeover switch 104 for switching the pass frequency band to a transmission frequency band corresponding to one-way transmission and two-way transmission of CATV, and an operation knob of the changeover switch 104 as a housing. 101 is provided with a hole 105 for exposing so that it can be operated from the outside. The input terminal 102 is provided on the top surface of the housing 101, and the television terminal 103 is provided on the side surface of the housing 101. The changeover switch 104 is, for example, a slide switch, and the hole 105 is opened, for example, in a rectangular shape so that an operation knob of the slide switch can operate.

  As shown in FIG. 6A, the pass frequency band variable circuit 111 includes a changeover switch 104, a capacitor 112 connected between a pair of terminals a and b of the changeover switch 104, and a pair of changeover switches 104. A high-pass filter (hereinafter abbreviated as “HPF”) 113 connected between the terminals e and f of the first and second terminals e and f, and a terminal c of the changeover switch 104 is a terminal to which the input terminal 102 is connected. The terminal d of the changeover switch 104 is a terminal to which the television terminal 103 is connected. As shown in FIG. 6B, the HPF 113 includes a plurality of capacitors 121 (121-1 to 121-5) connected in series and a capacitor 122 between each connection end of the capacitors connected in series and the ground. The series connection of (122-1 to 122-3) and the coil 123 (123-0 to 123-3) is connected. In addition, only the coil 123-0 is connected between the connection end of the first capacitor 121-1 and the second capacitor 121-2 and the ground without the capacitor 112 being connected in series.

  With this configuration, when using a one-way CATV system that does not use an uplink, the HPF 113 is turned on, that is, the terminals c and e of the changeover switch 104 are connected, and the terminals d and f are connected. As a result of the connection, the changeover switch 104 is switched so as to cut a frequency band containing a lot of noise. On the other hand, when the bidirectional CATV system is used, the HPF 113 is turned off, that is, the terminal c and the terminal a of the changeover switch 104 are connected and the terminal d and the terminal b are connected. The changeover switch 104 is switched so that an upstream signal in the frequency band of 55 MHz can be used.

  7 and 8, the TV outlet 100 is installed in the wall so that the input terminal 102 connected to the coaxial cable 106 faces upward. In this case, the TV terminal 103 is connected to the outlet. It comes to face the outside from the window part 108 opened in the approximate center of the plate 107.

Here, as described above, the TV outlet 100 is normally exposed to rain or the like because it is inside the wall, but water droplets condensed on the coaxial cable 106 of the wiring system travels along the coaxial cable 106 to the TV outlet. 100 may flow to the input terminal 102, and may further flow into the hole 105 of the TV outlet 100. As a result, the water droplets wet the internal pass frequency band variable circuit 111 and the characteristics of the TV outlet 100 are deteriorated, which adversely affects the received video. Therefore, as shown in FIG. 5, the flow of water from the input terminal 102 to the hole 105 between the input terminal 102 and the hole 105 provided on the upper surface of the housing 101 in the TV outlet 100 is cut off. A groove portion 109 having a substantially U-shaped cross section is provided on the upper surface of the housing 101 from edge to edge (for example, Patent Document 1).
JP 2002-134217 A

  By the way, miniaturization is requested in various technical fields, but miniaturization is also demanded in the technical field of television outlets. When trying to downsize a TV outlet, the distance between the input terminal and the hole is inevitably shortened. As a result, in the above-described drip-proof structure with the groove portion, a case where a water droplet flows into the hole portion beyond the groove portion may occur.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a television outlet having a drip-proof structure different from the conventional drip-proof structure.

In order to achieve the above-described object, a television outlet according to the present invention is provided with an input for connecting a housing having a hole formed on one surface and a wiring system disposed on the one surface and transmitting broadcast waves. A terminal and a television terminal that is disposed on the other surface of the housing for connecting to a receiving device, and the one surface includes a U-shape that partially surrounds the hole portion in a plan view And the input terminal is disposed so as to cover the groove, so that the height of the frame of the hole is between the input terminal and the input terminal. A step is provided that is higher than the height at the base .

In the above-described television outlet, the U-shaped back of the groove portion is guided to guide the water droplets so that the water droplets traveling through the wiring system are drained through a surface that forms an angle of approximately 90 degrees with the one surface . The part reaches the edge of the surface forming an angle of approximately 90 degrees with the one surface .

  Further, in these television outlets described above, the hole is formed with an engagement portion that engages with the operation knob by looking into the operation knob of the changeover switch that switches the frequency band, and the operation knob is externally attached to the housing. An operation knob extension member for enabling operation is further provided, and the operation knob extension member has a restricting portion for restricting a moving range at both ends in the operation direction.

  Further, in the above-described television outlets, the engaging portion is a leg piece protruding on the back surface at an asymmetrical position in the longitudinal direction and the width direction of the operation knob extending member.

  In the above-described television outlets, a guide portion that guides the operation direction of the operation knob extension member is further provided on the one surface between the hole portion and the input terminal.

In the TV outlet having the above-described configuration, on one side where the input terminal and the hole are present, a step between the input terminal and the hole is higher than the height at the base of the input terminal. Since the groove portion is provided, even if the water droplet flows along the cable to the input terminal, it is possible to prevent the water droplet from flowing into the hole portion due to the difference in level. And since this groove part has reached even the back and front edge in the upper surface of a case, the water droplet which flowed to the input terminal is guided to this groove part, and is drained along the back and front of the case. obtain. In such a drip-proof structure according to the present invention, a groove portion that cuts off the flow of water from the input terminal to the hole portion is provided between the input terminal and the hole portion as in the conventional drip-proof structure. Since it is not necessary to provide from the edge to the upper surface of the TV, the TV outlet can be manufactured in a smaller size.

Embodiments according to the present invention will be described below with reference to the drawings. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, The description is abbreviate | omitted.
(Configuration of the embodiment)
FIG. 1 is an external view of a television outlet according to the embodiment. 1A is a left side view of the top view of FIG. 1B, FIG. 1B is a top view, FIG. 1C is a front view, and FIG. (D) is a general | schematic top view of a television outlet in case an operation knob extension member is provided. FIG. 2 is a perspective view of the television outlet according to the embodiment. FIG. 2A is a perspective view of a television outlet without an operation knob extension member, and FIG. 2B is a perspective view of the television outlet with an operation knob extension member.

  1 (A), (B), (C) and FIG. 2 (A), the television outlet 1 includes a housing 11, an input terminal 12, a television terminal 13, and a changeover switch 14. The

  The input terminal 12 is a terminal for connecting a wiring system that transmits a broadcast wave, and is disposed on one surface, for example, the upper surface X, of the housing 11. The input terminal 12 employs a connector shape corresponding to the type of wiring cable. For example, in the present embodiment, since a coaxial cable is employed as a cable for transmitting a relatively high frequency broadcast wave, the input terminal 12 is a coaxial connector.

  The television terminal 13 is a terminal for connecting a receiving device such as a television receiver or a tuner, and is disposed on the other surface of the housing 11, for example, the front surface Y. As described in the prior art, the TV outlet 1 is normally provided in a wall, the input terminal 12 is connected to a wiring system laid in the wall substantially along the wall surface, and the TV terminal 13 faces the wall surface. Thus, the upper surface X of the housing 11 provided with the input terminal 12 and the front surface Y of the housing 11 provided with the television terminal 13 form an angle of approximately 90 degrees. The television terminal 13 employs a connector shape corresponding to the type of cable used for the receiving device. For example, in this embodiment, the television terminal 13 is also a coaxial connector like the input terminal 12.

  The changeover switch 14 is a switch for switching the pass frequency band. In the present embodiment, since the use of CATV one-way transmission and bidirectional transmission is switched, the changeover switch 14 has a pass frequency band corresponding to a transmission frequency band corresponding to one-way transmission and two-way transmission of CATV. This is a switch for switching between.

  The housing 11 is a case for housing a pass frequency band variable circuit composed of the changeover switch 14, HPF, and the like, and is, for example, a metal case having a substantially rectangular parallelepiped shape.

  A hole 21 through which the operation knob of the changeover switch 14 is viewed is opened on the upper surface X of the housing 11. Since the operation knob is operated through the hole 21, the hole 21 is formed in a substantially rectangular shape that is long in the operation direction of the operation knob. Then, a groove portion 23 having a U-shaped cross section that is U-shaped (U-shaped) is formed on the upper surface X of the housing 11 so as to surround the hole portion 21 in plan view to the upper surface X. In the example shown in FIG. 1, the groove 23 has a U shape as a part of the π shape in plan view on the upper surface X. Further, as can be seen from FIG. 1B and FIG. 2, the input terminal 12 is disposed so as to cover the groove 23, so that the frame of the hole 21 is interposed between the input terminal 12 and the hole 21. A step is provided in which the height at the portion (the height of the partial surface C where the hole portion 21 is formed) is higher than the height at the base of the input terminal (the height of the bottom surface D of the groove portion 23). The reference surface of the height of the frame portion of the hole 21 and the height at the base of the input terminal is the same reference surface, for example, the bottom surface of the housing 11.

  Here, in the example shown in FIG. 1B or FIG. 2, the groove portion 23 is formed so that the back portion of the U shape (the portion of the vertical line of the U shape) is parallel to the back surface Z. The groove 23 may be formed so that the U-shaped spine portion is parallel to the front surface X, and the U-shaped spine portion is parallel to the right side W. A groove 23 may be formed. Further, for this purpose, the groove portion 23 may be formed in a square shape, an inverted L shape, or an I shape in which the input terminal 12 can be disposed so as to cover the groove portion 23.

  In the television outlet 1 according to the present embodiment, the height at the frame portion of the hole 21 is input between the input terminal 12 and the hole 21 on the upper surface X where the input terminal 12 and the hole 21 are present. Since the level difference higher than the height at the base of the terminal 12 is provided by the groove portion 23, even if a water droplet flows to the input terminal 12 through the coaxial cable connected to the input terminal 12, there is a difference in height. It is possible to prevent water droplets from flowing into the hole portion 21 due to the step. And since this groove part 23 has reached the edge of the back surface Z and the front surface Y in the upper surface X of the housing | casing 11, the water droplet which flowed to the input terminal 12 is guided to this groove part 23, and the housing | casing 11 It can be drained along the back Z or the front Y. Further, in such a drip-proof structure, as in the conventional drip-proof structure shown in FIG. 5, water flows from the input terminal 102 to the hole portion between the input terminal 102 (FIG. 5) and the hole portion 105 (FIG. 5). It is not necessary to provide a groove 109 (FIG. 5) that cuts off the flow to 105 on the upper surface of the housing 101 (FIG. 5) so as to reach from the right side edge to the left side edge. Can be manufactured.

  In this embodiment, the operation knob of the changeover switch 14 is formed so as to be housed inside the housing 11, but is exposed to the outside of the housing 11 from the viewpoint of facilitating operation from the outside of the housing 11. You may form as follows. In this regard, in the present embodiment, from the viewpoint of facilitating operation from the outside of the housing 11, as shown in FIGS. 1D and 2B, the operation knob is engaged with the operation knob of the changeover switch 14. An operation knob extension member 31 for enabling operation from the outside of the housing 11 may be further provided. As can be seen from FIG. 1 (D), the operation knob extension member 31 of the present embodiment has a function of further enhancing the drip-proof effect because it is large enough to cover the hole 21.

  FIG. 3 is an external view of the operation knob. 3 (A) is a top view, FIG. 3 (B) is a front view, FIG. 3 (C) is a rear view, and FIG. 3 (D) is a right side view. . FIG. 4 is a cross-sectional view showing a part of the cross section along the AA ′ plane shown in FIG.

  In FIG. 3, the operation knob extending member 31 is a thin rectangular plate-like member 311 such as a resin. On the upper surface of the plate-like member 311 of the operation knob extension member 31, a convex piece 312 for hooking a finger or the like to move the operation knob extension member 31 is formed at, for example, the approximate center in the longitudinal direction. At both ends, restricting convex pieces 3111 and 3112 are formed that are bent approximately 90 degrees in the back direction to limit the movable range. Then, on the back surface of the plate-like member 311 of the operation knob extension member 31, four leg pieces 313-a, 313-b, 313-constituting engagement parts for engaging with the operation knob of the changeover switch 14 are provided. c and 313-d are formed at intervals. As shown in FIG. 4, the operation knob 141 of the changeover switch 14 is engaged by being fitted into a space formed by four leg pieces 313-a, 313-b, 313-c, and 313-d. Is done.

  Here, from the viewpoint of preventing an attachment error when attaching the operation knob extension member 31 to the housing 11, the four leg pieces 313-a, 313-b, 313-c, and 313-d are the operation knob extension members. 31 plate-like members 311 are formed so as to be asymmetrical in both the longitudinal direction and the width direction (direction perpendicular to the longitudinal direction). That is, as shown in FIG. 3, in the longitudinal direction, the four leg pieces 313-a, 313-b, 313-c, and 313-d are closer to one side than the convex piece 312 formed at the approximate center. And is formed on one side in the width direction.

  Further, the formation position in the longitudinal direction will be described with reference to FIG. 4A is a diagram showing the relationship between the operation knob and the operation knob extension member 31 in one switching state of the changeover switch 14 (corresponding to one switching state shown in FIG. 1D), and FIG. FIG. 8B is a diagram illustrating a relationship between the operation knob and the operation knob extension member 31 in another switching state of the changeover switch 14.

  In FIG. 4, the changeover switch 14 is disposed on the printed circuit board 15, and the operation knob 141 of the changeover switch 14 is formed by four leg pieces 313-a, 313-b, 313-c, and 313-d. Are engaged by being fitted in a space.

  4A, when the operation knob extension member 31 is engaged with the operation knob in the switching state of the changeover switch 14, L1 is a hole from the edge T of the bottom surface D and the partial surface C of the groove 23. L2 and L4 are the width of the leg piece 313-b (leg piece 313-d), L6 is the width of the leg piece 313-a (leg piece 313-c), L5 is the width of the operation knob of the changeover switch 14 (the distance between the leg piece 313-a and the leg piece 313-b, the distance between the leg piece 313-c and the leg piece 313-d), and L7 is the leg piece. This is an internal method from 313-a to the regulating convex piece 3111, and L3 + L4 is the moving length of the operation knob of the changeover switch 14. In this case, the length of the hole 21 in the longitudinal direction is approximately L2 + L3 + L4 + L5 + L6 as shown in FIGS. 4 (A) and 4 (B). The inner method of the operation knob extension member 31 from the restriction convex piece 3111 to the restriction convex piece 3112 is approximately L1 + L2 + L3 + L4 + L5 + L6 + L7. L7 indicates that when the changeover switch 14 is switched from one switching state shown in FIG. 4A to another switching state, as shown in FIG. The length is determined so as to contact the edge S of D and the partial surface C (the edge facing the edge T of the bottom surface D of the groove 23 and the partial surface C where the restricting convex piece 3112 contacts).

  L1 to L7 are set as described above, the leg pieces 313-b and 313-d are formed at positions L1 + L2 + L3 from the inside of the regulating convex piece 3112, and the leg pieces 313-a and 313-c are formed. By being formed at a position of L7 length from the inside of the restricting convex piece 3111, even if the operation knob extension member 31 is moved by the fingers of the installer of the TV outlet 1, the moving operation is restricted. 3111 and 3112 limit the movement range of the operation knob. For this reason, it is suppressed that the changeover switch 14 is damaged.

  Furthermore, in the case where such an operation knob extension member 31 is further provided, as shown in FIG. 1, from the viewpoint of enabling the installer or the like to easily slide and operate the operation knob extension member 31, Guide protrusions (ribs) 22 for guiding the operation direction of the operation knob extension member 31 are formed on the upper surface X between the hole 21 and the input terminal 12 so as to be parallel to the longitudinal direction of the hole 21. Further intervals may be provided. This interval corresponds to the interval M between the leg pieces 313-a and 313-b and the side of the plate-like member 311. Further, by providing such a guide convex piece 22, the drip-proof effect can be further improved. The guide convex piece 22 shown in FIG. 1 is substantially the same as the length of the hole portion 21 in the longitudinal direction, but may be further extended in one direction or both directions from this viewpoint.

  In the present embodiment, the changeover switch 14 is a switch for switching the pass frequency band, but is not limited to this, and is a switch for selecting one of a plurality of functions in a TV outlet. Good.

1 is an external view of a television outlet according to an embodiment. It is a perspective view of the television outlet socket concerning an embodiment. It is an external view of an operation knob. It is sectional drawing which shows a part of cross section in the AA 'plane shown to FIG. 1 (D). It is a general-view figure of the conventional television outlet. It is a circuit diagram which shows a pass frequency band variable circuit. It is a figure for demonstrating the attachment state of a television outlet. It is a figure for demonstrating the use condition of a television outlet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100 Television outlet 11, 101 Case 12, 102 Input terminal 13, 103 Television outlet 14, 104 Changeover switch 21, 105 Hole part 22 Guide convex piece 23 Groove part 31 Operation knob extension member 313 Leg piece 3111, 3112 Control convex piece C Partial surface on which the hole 21 is formed D Bottom surface S and T of the groove portion Edge between the bottom surface and the partial surface of the groove portion W Right side surface of the housing X Upper surface of the housing Y Front surface of the housing Z Rear surface of the housing

Claims (4)

A housing formed with a hole that is an opening on one surface, an input terminal for connecting to a wiring system that is disposed on the one surface and transmits broadcast waves, and is connected to a receiving device that is disposed on the other surface of the housing In a TV outlet equipped with a TV terminal for
On the one surface , a groove portion is formed in a shape including a U-shape that partially surrounds the hole portion in a plan view, and the input terminal is disposed so as to cover the groove portion. A step is provided between the hole and the input terminal, the height of the frame of the hole being higher than the height of the input terminal at the base ,
In order to guide the water droplets so that the water droplets traveling along the wiring system are drained through a surface having an angle of approximately 90 degrees with the one surface, the U-shaped back portion of the groove portion is approximately 90 degrees with the one surface. A TV outlet characterized by reaching the edge of the surface that forms the angle . In the hole, the operation knob of the changeover switch that switches the frequency band is looked into,
An engagement portion that engages with the operation knob is formed, and further includes an operation knob extension member that enables the operation knob to be operated from outside the housing.
The television outlet according to claim 1 , wherein the operation knob extension member has a restricting portion for restricting a moving range at both ends in an operation direction. The television outlet according to claim 2 , wherein the engaging portion is a leg piece that protrudes from the back surface at an asymmetrical position in the longitudinal direction and the width direction of the operation knob extension member. The television outlet according to claim 2 or 3 , wherein a guide portion for guiding an operation direction of the operation knob extension member is further provided on the one surface between the hole portion and the input terminal. .

Images