JP2005044628A - Fixing structure for antenna terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing structure for an antenna terminal capable of fixing the antenna terminal by mounting it onto a chassis without using a caulking tool. <P>SOLUTION: A base part 13 of the antenna terminal 11 is inserted to a hole 22 of the chassis 21, so that engaging pieces 22a of the chassis 21 reach a groove 14 of the antenna terminal 11 through cut-out parts 15b of a flange 15 of the antenna terminal 11. When the antenna terminal 11 is rotated, the engaging pieces 22a of the chassis 21 rotate to move in the groove 14 of the antenna terminal 11, and flange pieces 15a of the antenna terminal 11 are laid over backsides of the respective engaging pieces 22a of the chassis 21 so that the flange pieces 15a of the antenna terminal 11 are respectively engaged with the engaging pieces 22a of the chassis 21. The antenna terminal 11 is thereby mounted onto the chassis 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an antenna terminal fixing structure for fixing an antenna terminal to a chassis.

  In general, the antenna terminal is often attached to a metal chassis for shielding a circuit board. For example, as shown in FIG. 11, a hole 101a is formed in the side plate of the chassis 101, the base portion 103 of the antenna terminal 102 is inserted and fixed in the hole 101a of the chassis 101 side plate, and the rod-shaped terminal 104 at the center of the antenna terminal 102 is fixed. It is connected to a wiring pattern of a circuit board (not shown) built in the chassis 101 by soldering or the like.

  The base portion 103 of the antenna terminal 102 has a shape as shown in FIG. 12A. After the base portion 103 is inserted into the hole 101a of the chassis 101 side plate as shown in FIG. 12B, the base portion 103 is caulked. The base part 103 is crushed by pressing the tool 105, the antenna terminal 102 is fixed to the chassis 101 side plate, and the base part 103 is soldered to the chassis 101 and grounded.

  By the way, in order to crush the base 103 of the antenna terminal 102 inserted into the hole 101a of the chassis 101 side plate using the caulking tool 105, the caulking tool 105 must be stroked inside the chassis 101. It is necessary to provide a space for the stroke operation inside the chassis 101. For this reason, the structure of the chassis 101 around the antenna terminal 102 is limited, the degree of freedom in designing the chassis 101 is low, and it is difficult to reduce the size of the chassis 101.

  Therefore, the present invention has been made in view of the above-described conventional problems, and an object thereof is to provide an antenna terminal fixing structure that can be attached to a chassis and fixed without using a caulking tool. To do.

  In order to solve the above problems, the present invention provides an antenna terminal fixing structure for inserting and fixing a base portion of an antenna terminal into a hole in a chassis, and a groove and a flange are provided in parallel on the outer periphery of the base portion of the antenna terminal. A plurality of notches are formed in the flange, and a plurality of engagement pieces reaching the groove of the antenna terminal through the notches of the antenna terminal are provided on the inner periphery of the hole of the chassis.

  Further, in the present invention, the groove on the outer periphery of the base portion of the antenna terminal is blocked at at least one place.

  Furthermore, in the present invention, the depth of the groove on the outer periphery of the base portion of the antenna terminal is gradually changed.

  In the present invention, the width of the groove on the outer periphery of the base portion of the antenna terminal is gradually changed.

  Furthermore, in the present invention, the inner diameter of each engagement piece on the inner periphery of the hole of the chassis is gradually changed.

  Moreover, in this invention, the thickness of each engagement piece of the hole inner periphery of a chassis is changed gradually.

  Further, in the present invention, a convex portion is formed in the groove on the outer periphery of the base portion of the antenna terminal, and a concave portion that fits into the convex portion is provided on the engagement piece on the inner periphery of the hole of the chassis.

  In the present invention, a recess is formed in the groove on the outer periphery of the base portion of the antenna terminal, and a protrusion that fits into the recess is provided on the engagement piece on the inner periphery of the hole of the chassis.

    Furthermore, in the present invention, the antenna terminal is an F plug.

    In the present invention, the antenna terminal is a DIN terminal.

    Furthermore, in the present invention, the antenna terminal is a socket terminal.

  According to the present invention having such a configuration, when the base portion of the antenna terminal is inserted into the hole of the chassis, each engagement piece on the inner periphery of the hole of the chassis passes through each notch portion of the flange of the antenna terminal and the groove of the antenna terminal. To. Then, when the antenna terminal is rotated, the engagement pieces on the inner periphery of the hole of the chassis move in the groove of the antenna terminal, and the engagement pieces on the inner periphery of the hole of the chassis and the hook of the antenna terminal are engaged. The antenna terminal is fixed to the chassis. For this reason, it is possible to attach and fix the antenna terminal to the chassis without using a caulking tool, the structure of the chassis is not limited, and the degree of freedom in designing the chassis is increased.

  Further, according to the present invention, since the groove on the outer periphery of the base portion of the antenna terminal is blocked at at least one place, when the base portion of the antenna terminal is inserted into the hole of the chassis and the antenna terminal is rotated, the hole of the chassis Each engagement piece on the inner periphery moves to a position where the groove of the antenna terminal is blocked. Accordingly, the position of each engagement piece on the inner periphery of the chassis hole in the groove of the antenna terminal can be appropriately limited, and the engagement piece on the inner periphery of the chassis hole can be reliably engaged with the flange of the antenna terminal. it can.

  Further, according to the present invention, the depth of the groove on the outer periphery of the base of the antenna terminal is gradually changed, or the width of the groove on the outer periphery of the base of the antenna terminal is gradually changed. When the antenna terminal is rotated by being inserted into the hole of the chassis, each engagement piece on the inner periphery of the hole of the chassis bites into the groove of the antenna terminal, and the antenna terminal is securely fixed to the chassis.

  Further, according to the present invention, the inner diameter of each engagement piece on the inner periphery of the chassis hole is gradually changed, or the thickness of each engagement piece on the inner periphery of the chassis hole is gradually changed. In this case as well, when the base of the antenna terminal is inserted into the hole of the chassis and the antenna terminal is rotated, each engagement piece on the inner periphery of the hole of the chassis bites into the groove of the antenna terminal, and the antenna terminal is securely attached to the chassis. Fixed to.

  Furthermore, according to the present invention, the convex portion is formed in the groove on the outer periphery of the base portion of the antenna terminal, and the concave portion that fits the convex portion is provided in the engagement piece on the inner periphery of the hole of the chassis. Or the recessed part is formed in the groove | channel of the base part outer periphery of an antenna terminal, and the convex part fitted to this recessed part is provided in the engagement piece of the hole inner periphery of a chassis. For this reason, when the base portion of the antenna terminal is inserted into the hole of the chassis and the antenna terminal is rotated, the convex portion and the concave portion are fitted to each other, and the antenna terminal is securely fixed to the chassis.

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

  FIGS. 1A, 1B, and 1C are a side view showing an antenna terminal in the first embodiment of the fixing structure of the present invention, a cross-sectional view taken along A-A in FIG. . FIG. 2 is a plan view showing a hole in the chassis in the first embodiment.

  The antenna terminal 11 according to the first embodiment has a cylindrical shape made of metal, is filled with an insulating member inside the cylindrical shape, and is supported by penetrating the rod-shaped terminal 12 in the center of the insulating member. . A groove 14 is formed on the outer periphery of the base portion 13 of the antenna terminal 11, and a flange 15 is provided at the end of the base portion 13. The collar 15 is composed of two collar pieces 15a, and two notches 15b are formed between the collar pieces 15a.

  On the other hand, the hole 22 of the chassis 21 according to the first embodiment has two engagement pieces 22a on the inner periphery thereof, and two notches 22b are formed between the engagement pieces 22a. The sizes and positions of the engagement pieces 22a are set so as to pass through the notches 15b of the flange 15 of the antenna terminal 11. In addition, the size and position of each notch 22b are set so that each flange 15a of the flange 15 of the antenna terminal 11 passes.

  In order to attach the antenna terminal 11 to the chassis 21, first, the base portion 13 of the antenna terminal 11 is inserted into the hole 22 of the chassis 21. At this time, as shown in FIG. 3A, each engagement piece 22 a of the chassis 21 reaches the groove 14 of the antenna terminal 11 through each notch portion 15 b of the flange 15 of the antenna terminal 11, and the flange 15 of the antenna terminal 11. Each of the flanges 15a reaches the back side of the chassis 21 through the notches 22b of the chassis 21.

  Then, the antenna terminal 11 is rotated. Thereby, as shown in FIG. 3B, each engagement piece 22 a of the chassis 21 rotates and moves in the groove 14 of the antenna terminal 11, and each flange piece 15 a of the antenna terminal 11 becomes each engagement piece of the chassis 21. The antenna terminals 11 are attached to the chassis 21 so as to overlap each other on the back surface side of the antenna terminals 22 a, the flanges 15 a of the antenna terminals 11 and the engagement pieces 22 a of the chassis 21 are engaged. Further, the base portion 13 of the antenna terminal 11 is soldered to the chassis 21 and grounded.

  Thereafter, the rod-like terminal 12 of the antenna terminal 11 is connected to a wiring pattern of a circuit board (not shown) built in the chassis 21 by soldering or the like.

  In this way, the base portion 13 of the antenna terminal 11 is inserted into the hole 22 of the chassis 21 and the antenna terminal 11 is rotated so that the flange pieces 15a of the antenna terminal 11 and the engagement pieces 22a of the chassis 21 are engaged. Since the antenna terminal 11 can be attached to the chassis 21, it is not necessary to perform a stroke operation of the caulking tool inside the chassis as in the prior art. For this reason, the structure of the chassis 21 is not limited, the degree of freedom in designing the chassis 21 is increased, and the chassis 21 can be downsized.

  FIG. 4 is a cross-sectional view showing Modification 1 of the fixing structure. Here, each stopper 14 a is provided in the groove 14 of the antenna terminal 11. Each stopper 14 a is located at the end of each flange 15 a of the antenna terminal 11, abuts on each engagement piece 22 a of the chassis 21 that is rotationally moved in the groove 14 of the antenna terminal 11, and each engagement piece 22a is positioned and securely overlapped with each flange 15a of the antenna terminal 11, and each flange 15a of the antenna terminal 11 and each engagement piece 22a of the chassis 21 are securely engaged. Thereby, the attachment work of the antenna terminal 11 becomes easy.

  FIG. 5 is a cross-sectional view showing Modification Example 2 of the fixing structure. Here, the depth of the groove 14 of the antenna terminal 11 is gradually changed. The base portion 13 of the antenna terminal 11 is inserted into the hole 22 of the chassis 21 and the antenna terminal 11 is rotated, so that each engagement piece 22a of the chassis 21 is rotated from a deep portion of the groove 14 of the antenna terminal 11 to a shallow portion. The tip of each engagement piece 22 a is bitten into the groove 14 of the antenna terminal 11. As a result, the antenna terminal 11 is securely fixed to the chassis 21.

  FIG. 6 is a cross-sectional view showing Modification Example 3 of the fixing structure. Here, the width of the groove 14 of the antenna terminal 11 is gradually changed. The base portion 13 of the antenna terminal 11 is inserted into the hole 22 of the chassis 21, and the antenna terminal 11 is rotated to move each engagement piece 22 a of the chassis 21 from a wide width portion of the groove 14 of the antenna terminal 11 to a narrow width portion. And the tip of each engagement piece 22a is bitten into the groove 14 of the antenna terminal 11. As a result, the antenna terminal 11 is securely fixed to the chassis 21.

  Alternatively, the tip of each engagement piece 22a of the chassis 21 may be bitten into the groove 14 of the antenna terminal 11 by adding a twist to the groove 14 of the antenna terminal 11.

  FIG. 7 shows a fourth modification of the fixing structure. Here, the inner diameter d of each engagement piece 22a of the chassis 21 is gradually changed. The base portion 13 of the antenna terminal 11 is inserted into the hole 22 of the chassis 21 and the antenna terminal 11 is rotated, so that each engagement piece 22a of the chassis 21 is changed from a portion where the inner diameter d of each engagement piece 22a is large to a small portion. The tip of each engagement piece 22 a is bitten into the groove 14 of the antenna terminal 11. As a result, the antenna terminal 11 is securely fixed to the chassis 21.

  FIGS. 8A and 8B show a fifth modification of the fixing structure. Here, the thickness e of each engagement piece 22a of the chassis 21 is gradually changed. The base portion 13 of the antenna terminal 11 is inserted into the hole 22 of the chassis 21 and the antenna terminal 11 is rotated so that the engagement pieces 22a are moved from the thin portions to the thick portions of the engagement pieces 22a of the chassis 21. The tip of each engagement piece 22 a is bitten into the groove 14 of the antenna terminal 11. As a result, the antenna terminal 11 is securely fixed to the chassis 21.

  Note that the engagement pieces 22 a of the chassis 21 may be slid and the tips of the engagement pieces 22 a may be bitten into the grooves 14 of the antenna terminal 11.

  FIG. 9 shows a modified example 6 of the fixing structure. Here, concave portions 14 b are formed at two locations on the groove 14 of the antenna terminal 11, and convex portions 22 c are formed at two locations on each engagement piece 22 a of the chassis 21. When the base portion 13 of the antenna terminal 11 is inserted into the hole 22 of the chassis 21 and the antenna terminal 11 is rotated so that the flange pieces 15 a of the antenna terminal 11 and the engagement pieces 22 a of the chassis 21 are overlapped, The concave portions 14b of the grooves 14 and the convex portions 22c of the engaging pieces 22a of the chassis 21 are fitted, and the antenna terminal 11 is securely fixed to the chassis 21.

  FIG. 10 shows a modified example 7 of the fixing structure. Here, convex portions 14 c are formed at two locations of the groove 14 of the antenna terminal 11, and concave portions 22 d are formed at two locations of each engagement piece 22 a of the chassis 21. When the base portion 13 of the antenna terminal 11 is inserted into the hole 22 of the chassis 21 and the antenna terminal 11 is rotated so that the flange pieces 15 a of the antenna terminal 11 and the engagement pieces 22 a of the chassis 21 are overlapped, The convex portions 14 c of the grooves 14 and the concave portions 22 d of the engaging pieces 22 a of the chassis 21 are fitted, so that the antenna terminal 11 is securely fixed to the chassis 21.

  In addition, this invention is not limited to the said embodiment, It can deform | transform variously. For example, the number of each flange piece 15a and each notch portion 15b of the antenna terminal 11 may be increased, and the number of each engagement piece 22a and each notch portion 22b of the chassis 21 may be increased. Moreover, the mounting structure of the present invention is suitable for F plugs, DIN terminals, socket terminals, and the like.

(A), (b), and (c) are the side view which shows the antenna terminal in Example 1 of the fixing structure of this invention, sectional drawing in alignment with AA of (a), and a bottom view. FIG. 3 is a plan view showing holes in the chassis in the first embodiment. (A) And (b) is a figure which shows the process in which the antenna terminal of FIG. 1 is attached to the hole of the chassis of FIG. It is sectional drawing which shows the modification 1 of the fixing structure of this invention. It is sectional drawing which shows the modification 2 of the fixing structure of this invention. It is sectional drawing which shows the modification 3 of the fixing structure of this invention. It is sectional drawing which shows the modification 4 of the fixing structure of this invention. It is sectional drawing which shows the modification 5 of the fixing structure of this invention. (A) And (b) is a top view which shows the modification 6 of the fixing structure of this invention, and sectional drawing in alignment with AA. It is sectional drawing which shows the modification 7 of the fixing structure of this invention. It is a perspective view which shows the conventional antenna terminal and chassis. (A) is a side view which shows the antenna terminal of FIG. 11, (b) is a side view which shows the state which attached the antenna terminal of FIG. 11 to the chassis.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Antenna terminal 12 Rod-shaped terminal 13 Base 14 Groove 15 鍔 15a 鍔 piece 15b Notch 21 Chassis 22 Hole 22a Engagement piece 22b Notch

Claims (11)

In the antenna terminal fixing structure for inserting and fixing the base of the antenna terminal into the hole of the chassis,
Grooves and ridges are arranged side by side on the outer periphery of the base of the antenna terminal, and a plurality of notches are formed in the ridge. A structure for fixing an antenna terminal, wherein a plurality of engaging pieces are provided.   2. The antenna terminal fixing structure according to claim 1, wherein the groove on the outer periphery of the base portion of the antenna terminal is blocked at at least one place.   2. The antenna terminal fixing structure according to claim 1, wherein the depth of the groove on the outer periphery of the base portion of the antenna terminal is gradually changed.   2. The antenna terminal fixing structure according to claim 1, wherein the width of the groove on the outer periphery of the base portion of the antenna terminal is gradually changed.   2. The antenna terminal fixing structure according to claim 1, wherein the inner diameter of each engagement piece on the inner periphery of the hole of the chassis is gradually changed.   2. The antenna terminal fixing structure according to claim 1, wherein the thickness of each engagement piece on the inner periphery of the hole of the chassis is gradually changed.   2. The antenna terminal fixing according to claim 1, wherein a convex portion is formed in a groove on the outer periphery of the base portion of the antenna terminal, and a concave portion that fits into the convex portion is provided in an engagement piece on the inner periphery of the hole of the chassis. Construction.   The antenna terminal fixing structure according to claim 1, wherein a concave portion is formed in a groove on an outer periphery of a base portion of the antenna terminal, and a convex portion that fits into the concave portion is provided on an engagement piece on an inner periphery of a hole of the chassis. .     The antenna terminal fixing structure according to claim 1, wherein the antenna terminal is an F plug.     The antenna terminal fixing structure according to claim 1, wherein the antenna terminal is a DIN terminal. The antenna terminal fixing structure according to claim 1, wherein the antenna terminal is a socket terminal.

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