JP2008160790A - Antenna for receiving terrestrial digital broadcasting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna for receiving terrestrial digital broadcasting in which angle adjustment to raise the antenna in the vertical direction in particular is facilitated and further, the adjusted state can be stably held. <P>SOLUTION: The present invention relates to an antenna provided in a mobile body such as a portable product having image display means and receiving terrestrial digital broadcasting. The terrestrial digital broadcasting receiving antenna has a base end side member 6 movably held by the mobile body, a rod-shaped telescopic forward end side member 7, and a bending section 8 for connecting together the base end side member 6 and the forward end side member 7 and restorably bent. The antenna is constructed so that it can appear from and disappear back into the inside of the mobile body. Holding means is provided at the bending section 8, and the holding member holds the base end side member 6 and the forward end side 7 member while they are bent to have a predetermined angle between them. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a terrestrial digital broadcast receiving antenna.

  In recent years, terrestrial digital broadcasting services have been started in Japan. This service includes a broadcasting service for a movable body (mobile device) such as a mobile product such as a mobile phone, and a mobile phone corresponding to this service is also provided. In other words, 1-segment broadcasting (one-segment broadcasting) that assumes reception on a movable body such as a mobile phone by dividing the broadcasting band of digital terrestrial broadcasting into 13 segments and allocating one of the segments to a service for the movable body Has been done. A service equivalent to data broadcasting is provided using a part of this band.

Such a 1Seg compatible mobile phone requires a dedicated antenna for receiving the radio waves, and such a 1Seg compatible antenna is usually provided separately from a radio transmission / reception antenna for calls and the like. Be
By the way, since the radio wave of terrestrial digital broadcasting is a longitudinal wave, it is preferable to use it as a vertical antenna with respect to the ground surface as a one-seg compatible antenna in order to obtain a clear image without adding noise. .

However, when viewing digital terrestrial broadcasting on a mobile phone, the mobile phone itself can be set up in a vertical state or laid down in a horizontal state. A structure to be bent is required.
As an antenna for a mobile phone having such a bending structure, an antenna for transmitting and receiving radio waves for calls and the like having a flexible joint has been known (for example, Patent Documents). 1).
JP 2000-261224 A

By the way, it is not necessary to stand the antenna for transmitting and receiving radio waves for telephone calls and the like in the vertical direction. Therefore, even if the antenna has the above-mentioned bendable joint, the angle of bending of the antenna is simply set. It is only possible to set it freely.
On the other hand, it is desired that the antenna dedicated to One Seg needs to stand in the vertical direction as described above, so that the angle can be easily adjusted and the state can be stably maintained.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to make it easy to adjust the angle especially for standing in the vertical direction, and to maintain the state stably. It is to provide a broadcast receiving antenna.

  In order to achieve the above object, the terrestrial digital broadcast receiving antenna of the present invention is an antenna that is provided on a movable body such as a portable product provided with an image display means and receives terrestrial digital broadcasts. A proximal end member that is rotatably held, a telescopic rod-shaped distal end side member, and a bent portion that connects between the proximal end member and the distal end side member and bends in a returnable manner. The bent portion is configured to be housed in a movable manner so that the bent portion holds the bent state in a state where the proximal end member and the distal end side member are bent at a predetermined angle. Means are provided.

  According to this terrestrial digital broadcast receiving antenna, it has a bent portion that bends between the base end side member and the tip end side member, and the base end side member and the tip end side member are at a predetermined angle at the bent portion. Since holding means for holding the bent state in a bent state is provided, the angle can be easily adjusted to stand in the vertical direction by being configured to be bent at a predetermined angle, for example, 90 degrees. In addition, the bent state can be stably held by the holding means.

Further, in the terrestrial digital broadcast receiving antenna, the bent portion includes a base end side member and a tip end side member that are rotatably fitted in a hole of one of the base end side member and the tip end side member. The holding means is connected to a hole of the other member via a connecting pin that is non-rotatably fitted, and the holding means is a substantially prismatic engagement member provided on the connecting pin. And a spring body having a pair of holding arms fixed to a member on which the connecting pin is rotatably fitted, and the spring body is an engaging part of the connecting pin between the holding arms. By holding the side surface of the member, when the member to which the spring body is fixed and the member to which the connecting pin is fitted is bent at a predetermined angle by the bent portion, the bent state is maintained. It is preferable to be configured.
In this way, the holding means can be configured simply by providing a substantially prismatic locking portion on the connecting pin and providing a spring body that sandwiches the side surface of the locking portion. The structure of the bent portion having the structure is simplified, the number of parts is reduced, and the assemblability is improved. Therefore, productivity can be improved and costs can be reduced.

In this terrestrial digital broadcast receiving antenna, the connecting pin is pivoted into the hole when the locking portion is press-fitted into the hole of the other member of the base end member and the tip end member. It is preferable that the fitting is impossible.
If it does in this way, the process of fitting a connection pin in the other hole of a base end side member or a tip end side member non-rotatably becomes only a press-fitting process, and assembly nature becomes good.

Further, in the terrestrial digital broadcast receiving antenna, the connecting pin is made unrotatable on a member of the base end side member and the tip end side member in which the connecting pin is rotatably fitted. It is preferable that a concave spring body housing portion is formed on the side facing the member to be fitted, and the spring body is housed and held in the spring body housing portion.
In this way, the spring body is housed in the spring body housing portion, so that the spring body is not exposed to the outside, and thus the spring body is reliably prevented from unexpectedly detaching from the bent portion, Furthermore, the design is also improved. Further, if the portions of the base end side member and the tip end side member that are connected to each other via the connecting pin are cut only on the inner surface side to face each other, as described above, the one member side A spring body accommodating part can be formed easily. And it becomes possible to accommodate a spring body here easily, Therefore Workability and assembly property become favorable.

Further, in the terrestrial digital broadcast receiving antenna, the bent portion is connected to the proximal end member and the distal end side member via connecting pins that fit into the holes of the proximal end member and the distal end member, respectively. And the holding means includes a substantially U-shaped spring body fixed to one of the proximal end member and the distal end member, and the proximal end member. And a holding hole formed in the other of the distal end side member, and when the proximal end side member and the distal end side member are bent at a predetermined angle by the bent portion, one end of the spring body It is preferable that the spring body is configured to hold the bent state by holding the member in which the portion is fitted into the holding hole to form the holding hole between the pair of tip portions.
In this way, since the holding means can be configured by simply providing the spring body and providing the holding hole fitted to the tip of the spring body, the configuration of the bent portion having such a holding means. Becomes simple, the number of parts is reduced, and the assemblability is improved. Therefore, productivity can be improved and costs can be reduced.

Further, in the terrestrial digital broadcast receiving antenna, the bent portion is connected to the proximal end member and the distal end side member via connecting pins that fit into the holes of the proximal end member and the distal end member, respectively. The holding means includes a spring body fixed to one of the proximal end member and the distal end member, the proximal end member, and the distal end member. A plurality of contact surfaces that are formed on the other of the contact surfaces and pressed against the spring body, and when the proximal end member and the distal end member are bent at a predetermined angle at the bent portion, It is preferable that a contact surface of one of the plurality of contact surfaces is in contact with and pressed against the spring body so that the bent state is maintained.
In this way, the holding means can be configured by a plurality of contact surfaces that are simply provided with a spring body and are pressed against and pressed against the spring body. This simplifies, reduces the number of parts, and improves assembly. Therefore, productivity can be improved and costs can be reduced.

Further, in the terrestrial digital broadcast receiving antenna, the bent portion includes the base end side member and the distal end side member via connection pins inserted through holes of the proximal end member and the distal end side member, respectively. The holding means is configured such that one end side of a coil spring externally attached to one of the base end side member and the front end side member abuts on the other member. When the one member and the other member are bent at a predetermined angle at the bent portion by pressing, it is preferable that the bent state of the other member with respect to the one member is maintained. .
In this way, since the holding means can be configured simply by providing a coil spring, the configuration of the bent portion having such a holding means is simplified, the number of parts is reduced, and the assemblability is also improved. . Therefore, productivity can be improved and costs can be reduced.

Further, in the terrestrial digital broadcast receiving antenna, the bent portion includes the base end side member and the distal end side member via connection pins inserted through holes of the proximal end member and the distal end side member, respectively. The holding means is connected to one of the base end member and the tip end member, and is attached to the one member. An extra cylindrical member having a pressing portion that is externally inserted into the coil spring and pressed against one end side of the coil spring, and the other end of the coil spring is interposed through the pressing portion of the cylindrical body. When the one member and the other member are bent at a predetermined angle at the bent portion, the bent state of the other member with respect to the one member is maintained by pressing I like it.
In this way, since the holding means can be configured simply by providing the coil spring and the cylindrical body, the configuration of the bent portion having such a holding means is simplified, and the number of parts is reduced. Also gets better. Therefore, productivity can be improved and costs can be reduced. Further, since the coil spring can be concealed by the cylindrical body, the appearance can be improved and the coil spring can be prevented from being deformed by an impact or the like.

In the terrestrial digital broadcast receiving antenna, it is preferable that the predetermined angle includes at least about 90 degrees.
If it does in this way, angle adjustment for making a base end side member and a front end side member bend in a bent part, and making a front end side member stand in the perpendicular direction becomes easy.

  Further, it is preferable that the movable body is a mobile phone, and in this way, reception of digital terrestrial broadcasting by the mobile phone is facilitated, and good image reception is possible.

  The terrestrial digital broadcast receiving antenna of the present invention is configured to be rotatable and extendable with respect to the movable body, and further, as described above, angle adjustment for standing in the vertical direction is easy. Therefore, the antenna can be erected in a good state with high sensitivity and no noise, and thereby a clear image can be obtained. Furthermore, since the bent state can be stably held by the holding means, a clear image can be obtained stably and continuously.

The present invention will be described in detail below.
FIGS. 1A to 1C are diagrams showing a mobile phone equipped with an antenna for receiving digital terrestrial broadcasting according to the present invention. In FIGS. This is a digital broadcast receiving antenna.

  The mobile phone 1 is a movable body in the present invention, and is configured such that the main body 3 and the lid 4 can be folded as shown in FIGS. 1 (a) and 1 (b), and further shown in FIG. 1 (c). Thus, the lid 4 rotates relative to the main body 3 so that the main body 3 can be covered. An input unit (not shown) composed of various keys is provided on the main body 3 side, and a liquid crystal screen 5 as an image display means is provided on the lid 4 side. In the cellular phone 1, an antenna (not shown) for transmitting and receiving radio waves for calls and the like is built in the main body 3 or the lid 4.

  The terrestrial digital broadcast receiving antenna (hereinafter referred to as an antenna) 2 is embedded and housed in the main body 3 as shown in FIG. 1B when not receiving terrestrial digital broadcast, and when receiving terrestrial digital broadcast, It is pulled out from the main body 3 and extended to a predetermined length as shown in FIG.

  As shown in FIGS. 2A and 2B, the antenna 2 includes a base end side member 6 that is rotatably held by the main body 3 of the mobile phone 1, and a rod-like front end side member 7 that can be expanded and contracted. And a bent portion 8 that connects the proximal end member 6 and the distal end side member 7 and bends in a reversible manner, and is retractably accommodated in the main body 3 as described above. It is configured.

  The base end side member 6 is made of metal and includes a substantially cylindrical male screw 9 and a columnar shaft body 10 inserted into the male screw 9 so as to be rotatable and slidable. As shown in FIG. 2B, the male screw 9 is attached to the end portion of the main body 3 by being screwed into the substantially cylindrical female screw 11 embedded in the end portion side of the main body 3. . The shaft body 10 has a diameter-expanded portion 10 a formed at the rear end thereof, and the diameter-increased portion 10 a abuts on a diameter-reduced portion 9 a formed on the male screw 9. Thus, the outer side of the main body 3 is prevented from coming out. In the main body 3, a lower portion of the female screw 11 is a hollow portion, and the antenna 2 is accommodated in the hollow portion.

  The distal end side member 7 is a multistage rod in which the side (distal end side) opposite to the bent portion 8 serving as a connecting portion with the proximal end side member 6 extends in two stages as shown in FIGS. It has a structure and has a pull-out knob 12 at its most advanced portion. That is, as shown in FIG. 2 (b), the distal end side member 7 is made of a metal-made cylindrical outer cylinder portion 13 continuous to the bent portion 8 and is slidably inserted into the outer cylinder portion 13. A cylindrical inner cylinder portion 14 and a columnar columnar portion 15 slidably inserted in the inner cylinder portion 14, and the pullout knob 12 is provided at the tip of the columnar portion 15. is there.

  The outer cylinder part 13 is formed with a reduced diameter part (not shown) at the tip thereof, and the inner cylinder part 14 is formed with a diameter enlarged part (not shown) at the rear end part thereof. Under such a configuration, when the inner cylinder portion 14 is pulled out from the outer cylinder portion 13 and slides in the outer cylinder portion 13 as shown in FIG. It is in contact with the reduced-diameter portion, and further sliding to the distal end side becomes impossible, so that it does not come off from the outer cylinder portion 13.

  Further, as shown in FIG. 2B, a reduced diameter portion (not shown) is formed at the distal end portion of the inner cylinder portion 14, and a substantially cylindrical holding cylinder is further provided at the distal end portion side. 16 is fixed here in an extrapolated state. The holding cylinder 16 is formed with a reduced diameter portion (not shown) at its distal end, and this reduced diameter portion is formed to have the same inner diameter as the reduced diameter portion of the inner cylinder portion 14.

  The columnar portion 15 is a flexible member that is slidably inserted into the reduced diameter portion of the inner cylinder portion 14 and the reduced diameter portion of the holding cylinder 16, and has a diameter-increased portion (not shown) at the rear end thereof. ) Is formed. Under such a configuration, when the columnar portion 15 is pulled out from the inner cylindrical portion 14 and slides in the inner cylindrical portion 14 as shown in FIG. It is in contact with the reduced diameter portion, and further sliding to the tip end side becomes impossible, so that it does not come off from the inner cylinder portion 14.

  4A and 4B show the distal end side of the base end side member 6, that is, the distal end side of the shaft body 10, and the rear end side of the distal end side member 7, that is, the rear end side of the outer cylinder portion 13. As shown, the base end side member 6 and the tip end side member 7 are connected to each other, and a bent portion 8 is bent so as to be able to return. The bent portion 8 is formed in a substantially cylindrical shape as a whole, and is formed to have substantially the same diameter as the shaft body 10. A pair of sandwiching pieces 17 and 17 are formed on the distal end side of the shaft body 10 constituting the bent portion 8 (the distal end side of the base end side member 6) as shown in FIG. A pair of clamping plates 18, 18 that are clamped between the clamping pieces 17, 17 are formed on the rear end side (the rear end side of the front end side member 7) of the outer cylinder portion 13 to be held.

As shown in FIG. 4B, a holding groove 19 is formed between the sandwiching pieces 17 and 17 on the rear end side (shaft body 10 side). The holding groove 19 has a substantially U-shape. The spring body 20 is held. Further, a caulking hole 21 for holding the spring body 20 is formed on one outer side of the holding groove 19, that is, on the outer surface side of the one holding piece 17.
In addition, holes for inserting the connecting pins 22 are formed in the sandwiching pieces 17 and 17, respectively. The hole 17a formed in one clamping piece 17 is of a large diameter that allows the engaging portion 22a of the connecting pin 22 to be freely pivoted and the hole 17b formed in the other clamping piece 17 is connected to the connecting pin 22. This is a small-diameter shaft in which the shaft portion 22b of 22 is rotatably fitted.

The clamping plates 18 and 18 are also formed with holes 18a through which the connecting pins 22 are inserted. These holes 18 a are for fitting the locking portions 22 a of the connecting pins 22 so as not to rotate, and have an opening shape substantially the same as the cross-sectional shape of the locking portions 22.
The connecting pin 22 includes a disc-shaped head portion 22c, a substantially prismatic locking portion 22a, and a circular shaft portion 22b. The locking portion 22a is formed in a substantially quadrangular prism shape in this embodiment, and the cross-sectional shape thereof is substantially square. Further, the connecting pin 22 is inserted in the state where the clamping plates 18 and 18 are sandwiched between the clamping pieces 17 and 17, and the shaft portion 22 b side is inserted from the hole 17 a side of the one clamping piece 17. It passes through the holes 18a of the holding plates 18 and 18 to the holes 17b of the other holding piece 17.

  With such a configuration, the connecting portion 22 of the connecting pin 22 is inserted into the hole 17a of one clamping piece 17 and the respective holes 18a of the clamping plates 18 and 18, and the shaft 22b is connected to the other clamping piece. 17 is inserted through the hole 17b. Here, the opening shape of the hole 18a of the clamping plates 18 and 18 is substantially the same square shape as the cross-sectional shape of the locking portion 22a. Therefore, in particular, when the connecting pin 22 is press-fitted into the holes 18a and 18a, the engaging portion 22a can be forcibly fitted to the holes 18a and 18a so as not to be rotatable. That is, the connecting pin 22 has its locking portion 22a fixed to the holding plates 18 and 18 of the distal end side member 7 without play.

  The opening shape of the hole 18a may be a circular shape with good workability. In that case, it is preferable that the locking portion 22a of the connecting pin 22 is rounded at the corner portion to leave a circular portion having the same diameter as the hole 18a, and this circular portion is press-fitted into the hole 18a. If it does in this way, like the case where an opening shape is square shape, the latching | locking part 22a of the connection pin 22 can be fitted non-rotatably with respect to the holes 18a and 18a. However, in this case, at the time of assembly, it is necessary to perform positioning by using a jig in order to determine the position of the substantially square columnar locking portion 22a.

  On the other hand, with respect to the base end side member 6, the locking portion 22 a is rotatably fitted in the hole 17 a of one holding piece 17, and the shaft portion 22 b is also turned to the hole 17 b of the other holding piece 17. Since it is freely fitted, the connecting pin 22 is held rotatably with respect to the base end side member 6. Under such a configuration, the bent portion 8 connects the proximal end side member 6 and the distal end side member 7 via the connecting pin 22 so as to be rotatable. Note that the head portion 22c of the connecting pin 22 has a larger diameter than the hole 17a of the one holding piece 17, and therefore the connecting pin 22 is press-fitted into the hole 18a of the holding plates 18 and 18, thereby The pieces 17, 17 and the sandwiching plates 18, 18 are held together without being removed. Therefore, even if the bending operation is repeated many times, the bending portion 8 is reliably prevented from being detached and disassembled.

  As shown in FIG. 4B, the substantially U-shaped spring body 20 is composed of a pair of arms (clamping arms) 20a and 20a and a base portion 20b for continuing them, and is a metal round bar. And a thin plate is formed by bending. In the present embodiment, the pair of arms 20a and 20a extend from the both ends of the base portion 20b to the inside once and then bend and extend so as to be parallel to each other so as to narrow the distance between the distal ends. With such a configuration, when the distance between the pair of arms 20a and 20a is expanded by an external force, the spring body 20 exerts an urging force in a direction of narrowing the same.

  The spring body 20 has its base portion 20 b held and fixed in the holding groove 19 communicating between the holding pieces 17 and 17 of the base end side member 6. That is, after the base portion 20b is held in the holding groove 19 in this way, the inside of the hole 21 is pressed so that the bottom portion of the hole 21 protrudes to the holding groove 19 side, so that the base portion 20b is It is held and fixed here without detaching from the holding groove 19.

In the state of being held and fixed in the holding groove 19 in this way, the spring body 20 extends the pair of arms 20a and 20a to between the holding plates 18 and 18 of the distal end side member 7, and the holding plates 18 and 18 The engaging portion 22a of the connecting pin 22 located between them is sandwiched. In other words, the pair of arms 20a, 20a exerts a biasing force so as to narrow the interval by the locking portion 22a being forcibly expanded, thereby holding the locking portion 22a. is there.
As described above, the locking portion 22a has a substantially square cross-sectional shape, and a pair of side surfaces 23a and 23a facing each other as shown in FIG. The other pair of side surfaces 23 b and 23 b are orthogonal to the axial direction of the distal end side member 7.

  Here, the spring body 20 is fixed to the proximal end side member 6, and the locking portion 22 a of the connecting pin 22 is fixed to the distal end side member 7. When the bending portion 8 is bent (bent), the locking portion 22a rotates between the arms 20a and 20a of the spring body 20. At this time, since the cross-sectional shape of the locking portion 22a is a square, the arms 20a and 20a sandwich the pair of side surfaces 23a and 23a facing each other or the other pair of side surfaces 23b and 23b. At this time, the urging force (spring force) can stably hold it.

  That is, as shown in FIG. 5 (a), the side surfaces 23a and 23a of the locking portion 22a are clamped by the arms 20a and 20a, so that the distal end side member 7 is linearly bent without bending the proximal end side member 6. The state extended to the shape can be stably maintained. Further, when the distal end side member 7 is bent from this state and the distal end side member 7 is bent substantially 90 degrees with respect to the proximal end side member 6 as shown in FIG. 5B, the distal end side member 7 is locked by the arms 20a and 20a. By sandwiching the side surfaces 23b and 23b of the portion 22a, the bent state of about 90 degrees can be stably held.

Therefore, the holding means of the present invention is constituted by the spring body 20 provided with such arms 20a, 20a and the engaging portion 22a of the connecting pin 22 held and held by the arms 20a, 20a. is there.
In addition, there are two directions for bending the distal end side member 7 with respect to the proximal end side member 6 by approximately 90 degrees, when bending the proximal end member 6 to the right side and bending to the left side. Of course, in any case, the bent state can be stably maintained.

In order to assemble the bent portion 8 of the antenna 2 having such a configuration, first, as described above, the base portion 20b of the spring body 20 is held in the holding groove 19 between the sandwiching pieces 17 and 17 of the proximal end side member 6. In this state, the inside of the hole 21 is pressed, and the bottom portion of the hole 21 is protruded (crimped) toward the holding groove 19, thereby fixing the base portion 20 b of the spring body 20 to the holding groove 19.
Next, the clamping plates 18 and 18 of the distal end side member 7 are inserted between the clamping pieces 17 and 17, and the arms 20 a and 20 a of the spring body 20 are positioned between the clamping plates 18 and 18.
Thereafter, the connecting pin 22 is inserted into the hole 17a of the one holding piece 17 from the shaft portion 22b side, and is inserted into the hole 17b of the other holding piece 17 by press-fitting. At that time, the locking portion 22a is forcibly fitted into the holes 18a, 18a of the sandwiching plates 18, 18, and the locking portion 22a is inserted between the arms 20a, 20a of the spring body 20, and the arms 20a, 20a Hold the side.

In the cellular phone 1 having the antenna 2 manufactured as described above, in a normal time when terrestrial digital broadcasting is not received, the tip side member 7 is contracted as shown in FIG. Then, as shown in FIG. 1B, it is embedded in the main body 3 and stored.
When receiving terrestrial digital broadcasting from such a state, for example, the attitude of the lid 4 is determined as shown in FIG. 1C, and the antenna 2 is connected to the main body 3 as shown in FIG. The distal end side member 7 is extended to the maximum to have a predetermined length.

  In particular, when the main body 3 is laid down as shown in FIG. 1 (c), the antenna 2 is extended as shown in FIG. 3 (a), or in FIG. 3 (a) or 3 (b). ), The distal end side member 7 is rotated and bent at the bent portion 8 in a state of being extended halfway. Then, as described above, the locking portion 22a rotates between the arms 20a and 20a of the spring body 20. When the distal end side member 7 is bent by approximately 90 degrees with respect to the proximal end side member 6, the arms 20a, 20a of the spring body 20 become the side surfaces 23a, 23a of the locking portion 22a as shown in FIG. As shown in FIG. 5B, the side surfaces 23b and 23b are held. At that time, the arms 20a and 20a are temporarily expanded from the state in which the side surfaces 23a and 23a are sandwiched, and then the side surfaces 23b and 23b are sandwiched by the urging force (spring force). The operator who bent the distal end side member 7 can obtain a click feeling. Therefore, it can be easily sensed that the distal end side member 7 is bent approximately 90 degrees.

  When the distal end side member 7 is bent approximately 90 degrees in this way, the distal end side member 7 is stably held in the bent state by the holding means including the spring body 20 and the connecting pin 22. Therefore, the distal end side member 7 can be directed in the vertical direction by further rotating the distal end side member 7 around the axis of the proximal end side member 6 in the bent state. Therefore, it is possible to enjoy terrestrial digital broadcasting with a clear image under a good condition with good sensitivity and no noise.

  In such an antenna 2, since the angle adjustment for standing in the vertical direction is easy as described above, the antenna can stand in a good state with good sensitivity and no noise, Thereby, a clear image can be obtained. Furthermore, since the bent state can be stably held by the holding means, a clear image can be obtained stably and continuously.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, with respect to the arms 20a, 20a of the spring body 20 and the locking portion 22a of the connecting pin 22 constituting the holding means of the present invention, as shown in FIG. While forming the recessed part 24 in a side surface, you may form the convex part 25 engaged with the said recessed part 24 in the arms 20a and 20a.
Here, in the second aspect of the present invention, the shape of the engaging portion of the connecting pin is “substantially prismatic” because the structure having the recess 24 as shown in FIG. 6 or the two-dot chain line in FIG. Since the structure with chamfered corners as shown in FIG. 5 functions as a prismatic shape of the holding means in the present invention, such a structure is also included in the “prismal column shape” defined in the present invention. It is.

  Further, the shape of the locking portion 22a of the connecting pin 22 is not limited to a substantially quadrangular prism shape, but can be formed in a substantially octagonal shape. If the shape of the locking portion 22a is substantially octagonal, and therefore the cross-sectional shape thereof is regular octagonal as shown in FIG. 7, the distal end side member 7 is bent at approximately 90 degrees with respect to the proximal end side member 6. In addition to being able to hold this state, it can also be held when bent at approximately 45 degrees.

  Further, the configuration of the bent portion is not limited to the above embodiment, and various configurations can be adopted. FIGS. 8A and 8B are diagrams showing another embodiment of the terrestrial digital broadcast receiving antenna of the present invention, and are diagrams showing a configuration of a bent portion which is a portion different from the embodiment. The difference between the bent portion 30 of this embodiment and the bent portion 8 shown in FIGS. 4A and 4B is mainly in the shape of the connecting pin and the shape of the distal end side member.

  Even in this embodiment, the distal end side of the proximal end side member 31, that is, the distal end side of the shaft body 10 shown in FIG. 2, and the rear end side of the distal end side member 32, that is, the outer cylinder shown in FIG. A bent portion 30 that connects the base end side member 31 and the tip end side member 32 and bends in a returnable manner, as shown in FIGS. 8A and 8B. It has become. Like the bent portion 8, the bent portion 30 is formed in a substantially cylindrical shape as a whole, and is formed in substantially the same diameter as the shaft body 10. As shown in FIG. 8 (b), a pair of sandwiching pieces 33, 33 are formed on the distal end side of the shaft body 10 constituting the bent portion 30, and on the rear end side of the outer cylinder portion 13 constituting the bent portion 30. Is formed with a quadrangular prism-shaped prism portion 34 that is sandwiched between the sandwiching pieces 33.

A holding groove 35 is formed between the holding pieces 33 and 33 on the rear end side (shaft body 10 side), and the holding groove 35 has a substantially U-shaped spring constituting the holding means in the present invention. The body 36 is held. A caulking hole 37 for holding the spring body 36 is formed on one outer side with respect to the holding groove 35, that is, on the outer surface side of the one holding piece 33, and the inside of the hole 37 is pressed. Due to the caulking, the spring body 36 is held and fixed here without being detached from the holding groove 35.
Further, the holding pieces 33 and 33 are respectively formed with holes 33a through which the connecting pins 38 are inserted, and the connecting pins 38 are rotatably fitted and inserted into the holes 33a and 33a. .

  A through hole 34a for inserting a connection pin 38 is also formed in the prism 34, and the connection pin 38 is rotatably fitted and inserted into the through hole 34a. With such a configuration, the bent portion 30 of the present embodiment is connected so that the proximal end side member 31 and the distal end side member 32 can rotate via the connection pins 38 inserted into the holes 33a and the through holes 34a, respectively. It has become.

  The connecting pin 38 includes a pin main body 39 inserted through the hole 33 a and the through hole 34 a and a fixed shaft 40 engaged with the pin main body 39. The pin body 39 includes a head portion 39a and a cylindrical portion 39b inserted through the hole 33a and the through-hole 34a. The fixed shaft 40 is inserted into the head portion 40a and the cylindrical portion 39b by force fitting (press-fit). It consists of a shaft portion 40b to be locked.

  As shown in FIG. 8B, the substantially U-shaped spring body 36 includes a pair of arms 36a and 36a and a base portion 36b that connects them, and a metal round bar or a thin plate is used. It is formed by bending. With such a configuration, when the distance between the pair of arms 36a and 36a is expanded by an external force, the spring body 36 exerts an urging force in a direction in which the spring body 36 is narrowed.

  On the other hand, a holding hole 41 is formed in the prism portion 34 separately from the through hole 34a. The holding hole 41 constitutes the holding means of the present invention together with the spring body 36. The holding hole 41 is orthogonal to the through hole 34a and penetrates between the side surfaces 34b and 34b of the prism portion 34 to the side surfaces 34b and 34b. Each is open. With this configuration, when the proximal end member 31 and the distal end side member 32 are bent at the bent portion 30, the holding hole 41 has one arm 36a of the spring body 36 as shown in FIG. It fits into the tip part of this, and this is penetrated. In this state, the spring body 36 is held in a bent state by sandwiching the distal end portion of the prism portion 34 by the pair of arms 36a, 36a. That is, by pressing the tip end surface 34c of the prismatic part 34 with one arm 36a and pressing the inside of the holding hole 41 of the prismatic part 34 with the other arm 36a, the tip part of the prismatic part 34 is clamped by these arms 36a and 36a. It is like that.

  In the bent portion 30 having such a configuration, the side surfaces 34b and 34b of the prismatic portion 34 are sandwiched between the arms 36a and 36a of the spring body 36 as shown in FIG. Thus, the state in which the distal end side member 32 is straightly extended without being bent can be stably maintained. Further, when the distal end side member 32 is bent from this state and the distal end side member 32 is bent substantially 90 degrees with respect to the proximal end side member 31 as shown by a two-dot chain line in FIG. The distal end of one of the arms 36a is fitted into the holding hole 41, whereby the pair of arms 36a, 36a sandwich the distal end of the prism portion 34, and the bent state is maintained.

  Therefore, even in an antenna including such a bent portion 30, the angle adjustment for making the bent portion 30 stand in the vertical direction is easy, so that the sensitivity is good and the noise is not introduced. The antenna can be made to stand up, whereby a clear image can be obtained. Furthermore, since the bent state can be stably held by the holding means, a clear image can be obtained stably and continuously.

FIGS. 10A and 10B are diagrams showing still another embodiment of the terrestrial digital broadcast receiving antenna of the present invention, and are diagrams showing a configuration of a bent portion which is different from the above-described embodiment. The bent portion 50 of this embodiment is different from the bent portion 30 shown in FIGS. 8A and 8B in that the shape of the spring body and the holding hole 41 are not formed.
That is, the spring body 51 constituting the holding means in the bent portion 50 is formed by bending a metal round bar or thin plate into a substantially U shape (U shape) as shown in FIG. Arms 51a and 51a that are both end portions (tip portions) are bent and processed into a U shape in a side view.

  The spring body 51 is sandwiched by being pressed between the sandwiching pieces 33 and 33 of the base end side member 31 with the base 51b facing inward and the arms 51a and 51a facing outward. Further, the caulking hole 37 is pressed and caulked to fix the base portion 51b, so that the caulking hole 37 is held and fixed here without being disengaged between the sandwiching pieces 33 and 33. In the bent portion 50, the holding groove 35 is not formed between the holding pieces 33 and 33 of the base end side member 31, and therefore the spring body 51 is directly held and fixed between the holding pieces 33 and 33. .

  In the bent portion 50 having such a configuration, as shown in FIG. 11A, the arm 51 a of the spring body 51 abuts on the distal end surface (contact surface) 34 c of the prismatic portion 34, and presses it. The state where the distal end side member 32 is linearly extended without being bent with respect to the proximal end side member 31 can be stably maintained. Further, when the distal end side member 32 is bent from this state and the distal end side member 32 is bent substantially 90 degrees with respect to the proximal end side member 31 as shown in FIG. One side surface (one contact surface) 34b comes into contact with and is pressed against the arm portion 51a of the spring body 51, so that the bent state is maintained.

  Therefore, even in an antenna including such a bent portion 50, the angle adjustment for making the bent portion 50 stand in the vertical direction is easy. The antenna can be made to stand up, whereby a clear image can be obtained. Furthermore, since the bent state can be stably held by the holding means, a clear image can be obtained stably and continuously.

  In the embodiment shown in FIGS. 8A, 8B, 10A, and 10B, the tip shape of the prism portion 34 of the tip side member 32 is a quadrangular prism shape. By rounding the corner between the surface 34c and the side surface 34b, the corner slides more smoothly without being caught by the arm 36a (51a) of the spring body 36 (51) when bent. You may do it. However, when the distal end side member 32 is bent, the arms 36a, 36a (51a, 51a) are once expanded by the corners, and then closed to the original state. Accordingly, since the operator can obtain a click feeling by the operation of the spring body 36 (51) at that time, the click feeling can be obtained by leaving some corners and the bend is unexpectedly bent with a slight external force. It is preferable to prevent this from happening.

  In the embodiment, the spring body 20 (36, 51) is provided on the base end side member 6 (31) side. However, the configuration of the bent portion 8 (30, 50) including these constituent members is as follows. The proximal side member 6 (31) side and the distal end side member 7 (32) side may be reversed.

12 (a) and 12 (b) are diagrams showing still another embodiment of the terrestrial digital broadcast receiving antenna of the present invention, and are diagrams showing a configuration of a bent portion which is a portion different from the above-described embodiment. The bent portion 70 of this embodiment differs from the bent portion 8 shown in FIGS. 4A and 4B mainly in the structure of the proximal end side member 71 and the distal end side member 72 and the structure of the spring body 73. It is in.
Even in this embodiment, the distal end side of the proximal end side member 71, that is, the distal end side of the shaft body 10 shown in FIG. 2, and the rear end side of the distal end side member 72, that is, the outer cylinder shown in FIG. The rear end side of the portion 13 serves as a bent portion 70 that connects the base end side member 71 and the distal end side member 72 and bends them in a returnable manner. The bent portion 70 is also formed in a substantially cylindrical shape as a whole, like the bent portion 8, and is formed to have substantially the same diameter as the shaft body 10.

  However, in the present embodiment, a proximal end-side halved portion 74 is formed on the distal end side of the shaft body 10 constituting the bent portion 70 as shown in FIG. In addition, a similar front end side half portion 75 is also formed on the rear end side of the outer cylinder portion 13 constituting the bent portion 70. The base end side halved portion 74 and the distal end side halved portion 75 are formed by cutting and removing half of them by cutting or the like, and are disposed so as to face each other with their processed surfaces as inner surfaces. .

A hole 77 through which the connecting pin 76 is inserted is formed in the proximal end half portion 74, and a hole 78 through which the connecting pin 76 is inserted is formed in the distal end side half portion 75. Yes. The connecting pin 76 includes a pin main body 79 that is inserted through the holes 77 and 78, and a fixed shaft 80 that is engaged with the pin main body 79. The pin main body 79 includes a substantially truncated cone-shaped head portion 79a and a substantially rectangular tube-shaped locking portion 79b. The locking portion 79b is formed in a substantially rectangular tube shape in the present embodiment, and thereby has a substantially square cross-sectional shape. Here, the locking portion 79b is chamfered at its four corners (between side surfaces), and each of these chamfered portions constitutes a part of the same circle. Further, a circular hole (not shown) is formed in the locking portion 79b so as to open to the bottom surface side.
The fixed shaft 80 includes a head portion 80a and a shaft portion 80b, and the shaft portion 80b is forcibly fitted (press-fitted) into the circular hole of the locking portion 79a to be locked.

  Further, the hole 77 of the base end side half portion 74 is formed to have a slightly smaller diameter than the circle (outer periphery) formed by the chamfered portion of the engaging portion 79b of the pin body 79 of the connecting pin 76. Thus, as will be described later, the locking portion 79b of the pin main body 79 is non-rotatably fitted. On the other hand, the hole 78 of the tip side half portion 75 is formed to have a larger diameter than the circle (outer periphery) formed by the chamfered portion of the locking portion 79b of the pin body 79, which will be described later. The locking portion 79b of the pin main body 79 is rotatably fitted.

Further, a spring body housing portion 81 is formed on the processing surface of the distal end side half portion 75, that is, the inner surface facing the processing surface of the base end side half portion 74. The spring body 73 is held.
The spring body 73 has a substantially U-shape formed of a pair of sandwiching arms 73a and 73a that are curved in a substantially arc shape and a substantially arcuate base portion 73b that continues between the sandwiching arms 73a and 73a. . As will be described later, the holding arms 73a and 73a are formed so as to hold the locking portion 79b of the pin main body 79 between the distal ends thereof, and the arm of the spring body 20 shown in FIG. It functions similarly to 20a and 20a.

The base 73b is configured to maintain the curved state of the clamping arms 73a, 73a with little influence on the opening / closing operation associated with the clamping of the locking portion 79b. The portion 81 is held and fixed at the portion corresponding to the base portion 73b without rattling.
The spring body accommodating portion 81 is formed in a concave shape in the region including the hole 78 in the distal end side half portion 75, and an arm accommodating portion 81a for accommodating the sandwiching arms 73a and 73a of the spring body 73; It comprises a base accommodating portion 81b for accommodating the base portion 73b.

  The arm accommodating portion 81a is a concave portion in which the hole 78 is arranged slightly on the front end side from the central portion thereof, and is formed in a size and shape that allows opening and closing operations of the sandwiching arms 73a and 73a. As described above, the base accommodating portion 81b is a recess formed corresponding to the size and shape of the base 73b, and is configured to hold and fix the base 73b without rattling.

In order to assemble the bent portion 70 having such a configuration, first, the engaging portion 79b of the pin main body 79 of the connecting pin 76 is forcibly fitted (press-fitted) into the hole 77 of the proximal end half portion 74. At that time, the side surfaces of the locking portions 79b are arranged so as to face the axial direction of the proximal end side member 71 and the direction orthogonal thereto.
Separately from this, the spring body 73 is accommodated in the spring body accommodating portion 81. At this time, the spring body 73 is held and fixed in the spring body housing portion 81 by fitting the base portion 73 b of the spring body 73 into the base portion housing portion 81 b.

Next, the base end side half portion 74 and the front end side half portion 75 holding and fixing the spring body 73 are brought into contact with each other so that the respective processing surfaces face each other, and the base end side half portion 74 hole 77 is contacted. The locking portion 79 b protruding from the spring body 73 is held between the holding arms 73 a and 73 a of the spring body 73, and is further inserted into the hole 78 of the front end side half portion 75 to be freely fitted.
Thereafter, the shaft portion 80b of the fixed shaft 80 of the connecting pin 76 is inserted into the hole 78 of the distal end half portion 75, and is further forcibly fitted (press-fitted) into the circular hole of the locking portion of the pin body 79, thereby fixing the fixed shaft. 80 is fixed to the pin body 79. Thereby, the base end side half part 74 and the front end side half part 75 are fixed by the connecting pin 76 so as to be bent, and the bent part 70 is obtained.

Moreover, in the bending part 70 which consists of such a structure, as shown to Fig.13 (a), by clamping the pair of side surface of the latching | locking part 79b of the connection pin 76 with the clamping arms 73a and 73a of the spring body 73, The state where the distal end side member 72 is linearly extended without being bent with respect to the proximal end side member 71 can be stably maintained.
Further, when the distal end side member 72 is bent from this state and the distal end side member 72 is bent substantially 90 degrees with respect to the proximal end side member 71 as shown in FIG. 13B, the holding arms 73a and 73a are engaged. By sandwiching the other pair of side surfaces of the stop portion 79b, it is possible to stably hold the bent state by approximately 90 degrees.

  Therefore, even in an antenna including such a bent portion 70, the angle adjustment for making the bent portion 70 stand in the vertical direction is easy. The antenna can be made to stand up, whereby a clear image can be obtained. Further, the bent state is stably held by the spring body 73 provided with the holding arms 73a and 73a serving as holding means and the engaging portion 79b of the connecting pin 76 held and held by the holding arms 73a and 73a. Therefore, a clear image can be obtained stably and continuously.

  Further, in this embodiment, since the spring body 73 is accommodated in the concave spring body accommodating portion 81, the spring body 73 is not exposed to the outside, and therefore the spring body 73 is unexpectedly detached from the bent portion 70. It is surely prevented and the design is improved. Further, the halves 74 and 75 of the base end side member 71 and the distal end side member 72 that are connected to each other via the connecting pin 76 are formed by cutting only the inner surface side, thereby improving the workability. Can be. Furthermore, since the spring body 73 can be easily accommodated in the spring body accommodating portion 81, the assemblability can be improved.

  In the above embodiment, the connecting pin 76 is non-rotatably fitted to the proximal end member 71 side and the spring body 73 is provided on the distal end side member 72 side. However, the bent portion 70 including these constituent members is provided. About the structure of this, you may reverse the base end side member 71 side and the front end side member 72 side.

FIGS. 14A and 14B are diagrams showing still another embodiment of the terrestrial digital broadcast receiving antenna of the present invention, and are diagrams showing a configuration of a bent portion which is different from the above-described embodiment. The bent portion 90 of this embodiment is different from the bent portion 8 shown in FIGS. 4A and 4B in that the structure of the base end side member 91 and the tip end side member 92 and the coil spring 93 are mainly used. It is in.
Even in this embodiment, the distal end side of the proximal end side member 91, that is, the distal end side of the shaft body 10 shown in FIG. 2, and the rear end side of the distal end side member 92, that is, the outer cylinder shown in FIG. The rear end side of the portion 13 serves as a bent portion 90 that connects the proximal end side member 91 and the distal end side member 92 and bends them in a recoverable manner. The bent portion 90 is also formed in a substantially cylindrical shape as a whole, like the bent portion 8, and is formed to have substantially the same diameter as the shaft body 10.

  On the distal end side of the shaft body 10 (base end side member 91) constituting the bent portion 90, as shown in FIG. 14B, a first columnar portion 94, a second columnar portion 95, and a rectangular columnar prismatic portion 96 are provided. Are formed in this order. In addition, a pair of sandwiching pieces 97 and 97 for sandwiching the prismatic part 96 are formed on the rear end side of the outer cylinder part 13 (front end side member 92) constituting the bent part 90.

  The first cylindrical portion 94 of the proximal end member 91 is formed with a slightly smaller diameter than the proximal end member 91, and the second cylindrical portion 95 is formed with a smaller diameter than the first cylindrical portion 94. The prismatic part 96 is formed so that the length of the diagonal line is the same as or slightly smaller than the outer diameter of the second cylindrical part 95. The prismatic part 96 is formed with a hole 98 through which the connecting pin is inserted. The opening shape of the hole 98 is an oval shape (a long hole shape). That is, the hole 98 has a major axis having a diameter along the axial direction of the base end side member 91 and a minor axis having a diameter along a direction perpendicular to the axial direction. The major axis is slightly longer than the minor axis. It is formed.

  In addition, the coil spring 93 is attached to the prism portion 96 and the second column portion 95 in an extrapolated state, and a cylindrical tube 99 is externally attached to the coil spring 93 and the first column portion 94. It is attached in the inserted state. At this time, the cylindrical body 99 is fixed to the first cylindrical portion 94 by press-fitting. Under such a configuration, as shown in FIG. 14A, the base end side member 91 is configured such that the coil spring 93 is hidden by the cylindrical body 99 and the shaft body 10 (base end side member 91) has an outer diameter. The cylindrical body 99 is almost constant without creating a step.

  The sandwiching pieces 97 and 97 of the distal end side member 92 are formed so that the interval thereof substantially coincides with the thickness of the prismatic part 96. In order to insert a connecting pin into each of the sandwiching pieces 97 and 97, respectively. The hole 100 is formed. That is, the proximal end member 91 and the distal end side member 92 are configured such that the prismatic portion 96 of the proximal end side member 91 is sandwiched between the sandwiching pieces 97 of the distal end side member 92, and in this state, the holes 100, 98, By connecting the connecting pins 101 in the order of the holes 100 so as to be rotatable, the connecting pins 101 are connected to form a bent portion 90.

  The connecting pin 101 includes a head portion 101a and a shaft portion 101b formed to have a diameter larger than that of the hole 100, for example. The shaft portion 101b is sequentially inserted into the hole 100, the hole 98, and the hole 100, and then the washer. By being caulked in a state of fitting (not shown), the hole 100, the hole 98, and the hole 100 are held here without coming out. Instead of this, a connecting pin 38 including the pin body 39 and the fixed shaft 40 shown in FIG. 8 can be used.

  The hole 100 is formed so as to have substantially the same diameter as the shaft portion 101 b of the connecting pin 101, so that the tip side member 92 can rotate with respect to the connecting pin 101, but the diameter of the hole 100 is not limited. It can hardly move in the direction. On the other hand, the hole 98 of the base end side member 91 is formed so that the short diameter thereof is substantially the same as that of the shaft portion 101b of the connecting pin 101, and the long diameter is slightly larger (longer) than the shaft portion 101b. Under such a configuration, the base end side member 91 is rotatable with respect to the connecting pin 101, and its axial direction is slightly movable with respect to the connecting pin 101. .

  With such a configuration, the proximal end member 91 and the distal end side member 92 can rotate with each other, and the distance between them is slightly variable. In addition, the coil spring 93 is configured such that one end side of the coil spring 93 is pressed by the sandwiching pieces 97 and 97 while the prismatic part 95 is sandwiched between the pair of sandwiching pieces 97 and 97, and the other end side is the first cylindrical portion 94 and the second cylindrical portion 95. It is shortened by contact | abutting to the level | step-difference part between. Accordingly, the coil spring 93 always has a restoring force that tends to extend as much as possible to the original state, thereby abutting and pressing (urging) the holding pieces 97 and 97.

In other words, the bent portion 90 having such a configuration has the coil spring 93 in a state where the distal end side member 92 is linearly extended without being bent with respect to the proximal end side member 91 as shown in FIG. One end abuts against the end portions of the sandwiching pieces 97, 97 and presses them, so that the linearly extended state can be stably held.
Further, when the distal end side member 92 is bent from this state and the distal end side member 92 is bent substantially 90 degrees with respect to the proximal end side member 91 as shown in FIG. 15B, one end side of the coil spring 93 is held between the holding pieces 97. , 97 is brought into contact with and pressed against the side portion, so that the bent state at approximately 90 degrees is stably maintained.

  At that time, the coil spring 93 is urged (acted) against the bending operation by being pressed against the end portions of the clamping pieces 97 and 97 in the initial stage of the bending operation. By pressing the side part of 97, it is urged | biased (action) in the direction which promotes bending | flexion operation | movement. And if it bends about 90 degree | times by such bending operation | movement, since the bending beyond it will become impossible, an operator will obtain a click feeling. On the other hand, the coil spring 93 acts in the same manner when the wire is extended from a state bent approximately 90 degrees to a straight line, so that a click feeling can be obtained.

Further, in the bent portion 90, 90 degrees to 180 degrees between the linearly extended state shown in FIG. 15A and the bent state of about 90 degrees shown in FIG. 15B. Even in the bent state, the one end side of the coil spring 93 comes into contact with the sandwiching pieces 97 and 97, and the state is stably held by pressing it.
Further, when the distal end side member 92 is bent at approximately 90 degrees, the distal end side member 92 abuts on the end of the cylindrical body 99 as shown in FIG. Bend less than. That is, the cylinder 99 has a function as a stopper. The click feeling can be obtained by such contact.

  As described above, when the distal end side member 92 is not in good contact with the end of the cylindrical body 99 when the bending operation is performed, such as when the cylindrical body 99 functions as a stopper as described above. Since the opening shape of the hole 98 of the base end side member 91 is an oval shape (long hole shape), and the distance between the base end side member 91 and the front end side member 92 is made variable, the bending operation is smoothly performed. , The relative positional relationship is adjusted so as to be a better position.

Even in an antenna having such a bent portion 90, the angle can be easily adjusted to stand in the vertical direction by the bent portion 90, so that the antenna is in a good state with high sensitivity and no noise. Thus, a clear image can be obtained. Furthermore, since the bent state can be stably held by the holding means, a clear image can be obtained stably and continuously.
In particular, the configuration of the bent portion 90 is simplified, the number of parts is reduced, and the assemblability is improved, so that the productivity can be improved and the cost can be reduced.

In this embodiment, the cylindrical body 99 is used in order to conceal the coil spring 93 and also function as a stopper when the distal end side member 92 is bent. However, it is not always necessary to use the cylindrical body 99. Only the coil spring 93 may be used.
Further, in this embodiment, the coil spring 93 is extrapolated to the proximal end member 91 side and the sandwiching pieces 97 are formed on the distal end side member 92 side. However, the configuration of the bent portion 90 including these constituent members is as follows. The end member 91 side and the tip member 92 side may be reversed.

  FIGS. 16, 17A, and 17B are diagrams showing still another embodiment of the terrestrial digital broadcast receiving antenna of the present invention, and showing a configuration of a bent portion that is different from the above-described embodiment. It is. The bent portion 110 of this embodiment differs from the bent portion 90 shown in FIGS. 14A, 14B, 15A, and 15B mainly in the structure of the cylindrical body 99, the coil spring 93, and the like. Are in a relationship.

  In this embodiment, the cylindrical body 99 is slidably inserted without being fixed to the first cylindrical portion 94. Further, as shown in FIGS. 17A and 17B, the cylindrical body 99 has a lid-like shape that closes a part of the opening at the distal end side, that is, the end portion on the distal end side member 92 side. A pressing portion 99a is formed. The pressing portion 99a is formed with an opening 99b for projecting the prismatic portion 96 movably.

  The pressing portion 99 a is a portion where the outer surface side abuts on the distal end side member 92 and has a bowl inner surface shape corresponding to the distal end portions of the holding pieces 97, 97. That is, as shown in FIG. 16 and FIGS. 15 (a) and 15 (b), the front end portions of the sandwiching pieces 97 and 97 have a substantially spherical shape having a curvature R that protrudes outward as a whole. Then, corresponding to such a shape, the pressing portion 99a has an outer surface formed in the shape of the inner surface of the bowl, as described above, that is, a concave shape close to the inner surface of the sphere, as shown in FIG. 17 (a). Further, the curvature R is formed to substantially coincide with the curvature R of the sandwiching pieces 97, 97.

In the bent portion 110 having such a configuration, when the distal end side member 92 is linearly extended with respect to the proximal end side member 91, one end side of the coil spring 93 causes the pressing portion 99a of the cylindrical body 99 to be pressed. By pressing the end portions of the sandwiching pieces 97, 97 of the distal end side member 92, the linearly extended state is stably held.
In addition, when the distal end side member 92 is bent from this state and the distal end side member 92 is bent substantially 90 degrees with respect to the proximal end side member 91, one end side of the coil spring 93 is sandwiched via the pressing portion 99a of the cylindrical body 99. By abutting and pressing the side portions of the pieces 97, 97, the state bent at approximately 90 degrees is stably held.

  In addition, when the linear member is bent again after being bent in this manner, the outer surface of the pressing portion 99a of the cylindrical body 99 has a curvature R corresponding to the tip portions of the sandwiching pieces 97 and 97 as described above. Since it has a bowl shape, the leading end portions of the sandwiching pieces 97 and 97 are brought into close contact with and engaged with the center portion of the pressing portions 99a. And by the effect | action of the said coil spring 93, it comes to be stably hold | maintained in the state extended linearly. Accordingly, since the distal end side member 92 extends straight with respect to the proximal end side member 91, when the antenna 2 is subsequently embedded and stored in the main body 3, it is smoothly embedded without being caught by bending. -The storage operation can be performed.

  Further, with respect to the urging force by the coil spring 93, as in the case of the bending portion 90 shown in FIGS. 15A and 15B, the pressing portion 99a is attached to the end portions of the holding pieces 97 and 97 at the initial stage of the bending operation. By being pressed through, the urging (acting) is performed against the bending motion. After that, by pressing the side portions of the sandwiching pieces 97, 97, the bending pieces 97 are urged (acted) in the direction of promoting the bending operation. Therefore, the click feeling associated with such a bending operation can be obtained in the same manner as the bending portion 90 described above.

Therefore, even in an antenna including such a bent portion 110, the angle adjustment for making the bent portion 110 stand in the vertical direction is easy. The antenna can be made to stand up, whereby a clear image can be obtained. Furthermore, since the bent state can be stably held by the holding means, a clear image can be obtained stably and continuously.
In particular, the configuration of the bent portion 110 is simplified, the number of parts is reduced, and the assemblability is improved, so that the productivity can be improved and the cost can be reduced.
Further, since the coil spring 93 can be hidden by the cylindrical body 99, the appearance can be improved, and the coil spring 93 can be prevented from being deformed by an impact or the like.

In the above-described embodiment, the outer surface of the pressing portion 99a on the distal end side of the cylindrical body 99 is a curved surface such as the inner surface shape of the bowl. However, the distal end side corresponding to this has a substantially planar shape as shown in FIG. The distal end portion of the member 92 may also have a substantially planar shape.
That is, also in the bending part 120 shown in FIG. 18, the cylinder 105 is slidably extrapolated without being fixed with respect to the said 1st cylindrical part 94. FIG. Further, the cylindrical body 105 is also formed with an opening 105b for projecting the prismatic portion 96 movably at the pressing portion 105a at the end on the distal end side (the distal end side member 92 side).

The pressing portion 105a has a portion where the outer surface side comes into contact with the distal end side member 92, and the outer surface side has a substantially planar shape in which R is attached to the peripheral portion as described above. On the other hand, the front end portions of the sandwiching pieces 106 and 106 that correspond to the outer surface of the pressing portion 105a and are in contact with the pressing portion 105a have a substantially planar shape in which the outer peripheral edge portion is simply provided with an R as shown in FIG.
Further, in the present embodiment, the pin 110 is formed in a substantially cylindrical shape, fits in the hole 103 formed in the distal end portion 102 of the proximal end side member 91, and holds the pinching piece 106 of the distal end side member 92. By being press-fitted into the holes 100 of 106, the tip end side member 92 is held and fixed. Under such a configuration, the base end side member 91 and the tip end side member 92 are rotatably connected via the pin 110 to form a bent portion 120.

Even in the bent portion 120 having such a configuration, in the state where the distal end side member 92 is linearly extended without being bent with respect to the proximal end side member 91 as shown in FIG. The one end side of the cylindrical member 105 presses the end portions of the sandwiching pieces 106, 106 of the distal end side member 92 through the pressing portion 105a of the cylindrical body 105, so that the linearly extended state is stably held. Yes.
Further, as shown in FIG. 20B, when the distal end side member 92 is bent from this state and the distal end side member 92 is bent substantially 90 degrees with respect to the proximal end side member 91, one end side of the coil spring 93 is connected to the cylindrical body. By abutting the side portions of the sandwiching pieces 106 and 106 via the pressing portion 105a 105 and pressing them, the bent state at about 90 degrees is stably held.

  Further, with respect to the urging force by the coil spring 93, as in the case of the bending portion 90 shown in FIGS. 15A and 15B, at the initial stage of the bending operation, the pressing portion 105a is attached to the end of the sandwiching pieces 106 and 106. By being pressed through, the urging (acting) is performed against the bending motion. After that, by pressing the side portions of the sandwiching pieces 106, 106, it is biased (acted) in a direction that promotes a bending operation. Therefore, the click feeling associated with such a bending operation can be obtained in the same manner as the bending portion 90 described above. That is, the coil spring 93 is pushed against the end portions of the sandwiching pieces 106 and 106 at the initial stage of the bending operation, thereby retreating the tubular body 105, but thereafter, the tubular body 105 is advanced again to hold the sandwiching piece 106. , 106 is urged (acted) in a direction that promotes a bending motion. When bending about 90 degrees by such a bending operation, further bending becomes impossible, and the operator can feel a click by feeling the pressure accompanying the backward and forward movement of the cylindrical body 105. On the other hand, the coil spring 93 acts in the same manner when the wire is extended from a state bent approximately 90 degrees to a straight line, so that a click feeling can be obtained.

Therefore, even in an antenna having such a bent portion 120, the angle adjustment for making the bent portion 120 stand in the vertical direction is easy, so that the sensitivity is good and noise is not introduced. The antenna can be erected, whereby a clear image can be obtained. Furthermore, since the bent state can be stably held by the holding means, a clear image can be obtained stably and continuously.
In particular, the configuration of the bent portion 120 is simplified, the number of parts is reduced, and the assemblability is improved, so that the productivity can be improved and the cost can be reduced.
In addition, since the pressing portion 105a of the cylindrical body 105 has a substantially planar shape and the distal end portions of the sandwiching pieces 106 and 106 of the distal end side member 92 also have a substantially planar shape, the processing becomes easy and the productivity is improved. In addition, the cost can be reduced.
Furthermore, since the coil spring 93 can be hidden by the cylindrical body 105, the appearance can be improved and the coil spring 93 can be prevented from being deformed by an impact or the like.

In these embodiments, the coil spring 93 and the cylindrical body 99 (105) are extrapolated on the proximal end side member 91 side, and the sandwiching pieces 97 and 97 (106, 106) are formed on the distal end side member 92 side. About the structure of the bending parts 110 and 120 containing a structural member, you may reverse the base end side member 91 side and the front end side member 92 side.
Further, in the present invention, the movable body to which the antenna according to the present invention is applied is not limited to the above-described mobile phone, and for example, a notebook personal computer and other various mobile products, and an in-vehicle television and others It can also be applied to portable TVs.

(A)-(c) is a figure which shows schematic structure of the mobile telephone provided with the antenna for digital terrestrial broadcasting reception of this invention. It is an enlarged view of the antenna shown in FIG. 1, (a) is a side view, (b) is a sectional side view. (A)-(c) is a figure for demonstrating the state which the antenna shown in FIG. 1 expands and contracts. It is a figure which shows schematic structure of a bending part, (a) is a perspective view, (b) is a disassembled perspective view. (A), (b) is a figure for demonstrating the effect | action of the holding means in the bending part shown in FIG. It is a figure for demonstrating a modification. It is a figure for demonstrating another modification. It is a figure which shows schematic structure of a bending part, (a) is a perspective view, (b) is a disassembled perspective view. (A), (b) is a figure for demonstrating the effect | action of the holding means in the bending part shown in FIG. It is a figure which shows schematic structure of a bending part, (a) is a perspective view, (b) is a disassembled perspective view. (A), (b) is a figure for demonstrating the effect | action of the holding means in the bending part shown in FIG. It is a figure which shows schematic structure of a bending part, (a) is a perspective view, (b) is a disassembled perspective view. (A), (b) is a figure for demonstrating the effect | action of the holding means in the bending part shown in FIG. It is a figure which shows schematic structure of a bending part, (a) is a perspective view, (b) is a disassembled perspective view. (A), (b) is a figure for demonstrating the effect | action of the holding means in the bending part shown in FIG. It is a sectional side view which shows schematic structure of a bending part. It is a figure which shows schematic structure of a cylinder, (a) is a sectional side view, (b) is a perspective view. It is a disassembled perspective view which shows schematic structure of a bending part. It is a sectional side view which shows schematic structure of a bending part. (A) is a perspective view which shows the state which the antenna which has a bending part shown in FIG. 18 extended linearly, (b) is a perspective view which shows the state which the same antenna bent.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cellular phone, 2 ... Terrestrial digital broadcast receiving antenna, 3 ... Main body, 4 ... Cover, 5 ... Liquid crystal screen (image display means), 6, 31, 71, 91 ... Base end side member, 7, 32, 72 , 92 ... distal end side member, 8, 30, 50, 70, 90, 110, 120 ... bent portion, 17, 33 ... clamping piece, 18 ... clamping plate, 19 ... holding groove, 20, 36, 51, 73 ... spring Body, 20a ... arm (clamping arm), 22 ... connecting pin, 22a ... locking part, 22b ... shaft, 22c ... head, 23a, 23b ... side, 34 ... prismatic part, 34a ... through hole, 34b ... side , 34c ... distal end surface, 36a, 51a ... arm, 38 ... connecting pin, 41 ... holding hole, 73a ... clamping arm, 74 ... proximal end half portion, 75 ... distal end half portion, 76 ... connecting pin, 79b ... Locking part, 81 ... Spring accommodating part, 93 ... Coil spring, 97, 106 ... Jihen, 99,105 ... cylindrical body, 99a, 105a ... pressing portion 101 ... connection pin

Claims (10)

An antenna for receiving a digital terrestrial broadcast provided on a movable body such as a portable product provided with an image display means,
A base end side member that is rotatably held with respect to the movable body, a telescopic rod-shaped front end side member, and a connection between the base end side member and the front end side member and a returnable bending. A bending portion that is configured to be retractable in the movable body,
The terrestrial digital broadcast receiving antenna according to claim 1, wherein the bent portion is provided with holding means for holding the proximal end member and the distal end side member in a bent state at a predetermined angle. In the bent portion, the proximal end member and the distal end side member are rotatably fitted in the hole of one of the proximal end member and the distal end side member, and cannot be rotated in the hole of the other member. It is configured by being rotatably connected via a connecting pin that fits into
The holding means includes a substantially prismatic locking portion provided on the connecting pin, and a spring body having a pair of holding arms fixed to a member on which the connecting pin is rotatably fitted. The spring body sandwiches the side surface of the locking portion of the connecting pin between the sandwiching arms, whereby the member to which the spring body is fixed and the member to which the connecting pin is fitted are The terrestrial digital broadcast receiving antenna according to claim 1, wherein the antenna is configured to maintain a bent state when bent at a predetermined angle at the bent portion.   The connecting pin is fitted into the hole in a non-rotatable manner because the engaging part is press-fitted into the hole of the other member of the base end side member and the tip end side member. The terrestrial digital broadcast receiving antenna according to claim 2.   Of the proximal end member and the distal end side member, the member on which the connecting pin is rotatably fitted is concave on the side facing the member on which the connecting pin is non-rotatably fitted. 4. The terrestrial digital broadcast receiving antenna according to claim 2, wherein a spring body housing portion is formed, and the spring body housing portion houses and holds the spring body. The bent portion is configured by the base end side member and the tip end side member being rotatably connected via connection pins that fit into the holes of the base end side member and the tip end side member, respectively. ,
The holding means is formed on the other of the proximal end member and the distal end member, and a substantially U-shaped spring body fixed to one of the proximal end member and the distal end side member. When the proximal end member and the distal end side member are bent at a predetermined angle by the bent portion, one distal end portion of the spring body is fitted into the holding hole and the holding hole is formed. 2. The terrestrial digital broadcast receiving antenna according to claim 1, wherein the spring body is held between the pair of tip portions so that the bent state is maintained. The bent portion is configured by the base end side member and the tip end side member being rotatably connected via connection pins that fit into the holes of the base end side member and the tip end side member, respectively. ,
The holding means is formed on the other of the base end side member and the front end side member and is fixed to one of the base end side member and the front end side member, and contacts the spring body. A plurality of contact surfaces that are in contact with each other and pressed, and when the proximal end member and the distal end side member are bent at a predetermined angle by the bent portion, one contact of the plurality of contact surfaces 2. The digital terrestrial broadcast receiving antenna according to claim 1, wherein a surface is brought into contact with and pressed against the spring body to maintain a bent state. The bent portion is configured by the base end side member and the tip end side member being rotatably connected via connecting pins inserted through holes of the base end side member and the tip end side member, respectively. ,
The holding means is configured such that one end side of a coil spring that is extrapolated to one of the base end side member and the tip end side member abuts against and presses the other member, whereby the one member and the other member 2. The terrestrial digital broadcast receiving antenna according to claim 1, wherein when the second bent portion is bent at a predetermined angle by the bent portion, the bent state of the other member with respect to the first member is maintained. . The bent portion is configured by the base end side member and the tip end side member being rotatably connected via connecting pins inserted through holes of the base end side member and the tip end side member, respectively. ,
The holding means includes a coil spring extrapolated to one member of the base end member and the distal end member, an extrapolation to the one member, an extrapolation to the coil spring, and one end side of the coil spring A substantially cylindrical cylindrical body having a pressing portion pressed against the one end, and the one end side of the coil spring presses the other member via the pressing portion of the cylindrical body, whereby the one member and the other member 2. The terrestrial digital broadcast receiving apparatus according to claim 1, wherein when the member is bent at a predetermined angle by the bent portion, the bent state of the other member with respect to the one member is maintained. antenna.   The terrestrial digital broadcast receiving antenna according to any one of claims 1 to 8, wherein the predetermined angle includes at least approximately 90 degrees.   The terrestrial digital broadcast receiving antenna according to any one of claims 1 to 9, wherein the movable body is a mobile phone.

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