Antenna connection structure and portable radio

Abstract

To provide an antenna connection structure in which an antenna is hardly detached from a main body.SOLUTION: An antenna connection structure SK includes: an antenna 2 comprising an annular skirt part which is rod-shaped and extends from a root end face in a direction of an axis CL2 and a terminal base part 21 protruding from the root end face onto the axis; an antenna connection part 12 comprising a protrusion 12c formed in a main body part of radio equipment as a recess in a cylindrical hole shape, which includes a peripheral wall and a bottom wall 12e and into which the skirt part of the antenna can be inserted, and formed in a part of the peripheral wall so as to protrude inside and a main body terminal base including a contact electrically connected with a terminal base; and a spacer which is disposed while being inserted into the recess movably in a predetermined range in the axial direction and comprises a bank 34 abutted to the skirt part inserted into the recess and an engaging arm including a base 32a which is bent inside while being abutted and energized to the protrusion 12c at the deepest position in the predetermined range.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to an antenna connection structure and a portable wireless device.

Background Art

[0002] Patent Document 1 describes a portable wireless device having an antenna connection structure in which an antenna is detachable from a wireless device main body by a screw.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The antenna connection structure described in Patent Document 1 is provided with a tightening portion (external electrode 6) having a female screw (thread portion 8) at the base of the antenna. By turning this tightening portion to screw in / unscrew the female screw with respect to the male screw on the main body side, the antenna can be attached and detached. However, in the antenna connection structure described in Patent Document 1, if the tightening of the tightening portion is once loosened by an unexpected external force, the loosening progresses due to subsequent vibrations or the like, and as a result, there is a risk that the antenna may come off from the main body.

[0005] Further, when the connection structure of the antenna is not a screw, for example, in the case of a male-female insertion structure, in order to facilitate insertion and removal, if the insertion and removal force is made small and set constant with the insertion and removal stroke, there is a risk that the antenna may easily come off when a relatively small external force is repeatedly applied.

[0006] Therefore, the problem to be solved by the present invention is to provide an antenna connection structure and a portable wireless device in which the antenna is difficult to come off from the main body. [Means for solving the problem]

[0007] To solve the above problems, the present invention has the following configurations 1) to 4). 1) An antenna comprising a rod-shaped structure, an annular skirt portion extending axially from the base end face, and a terminal base portion protruding axially from the base end face, The main body of the radio has a peripheral wall and a bottom wall. 、 An antenna connection portion comprising: a cylindrical hole-shaped recess formed into which the skirt portion of the antenna can be inserted; a protruding portion formed to project inward from a part of the peripheral wall; and a main terminal base having a contact that electrically connects to the terminal base; A base is inserted into the recess so as to be movable within a predetermined range in the axial direction, and has a bank portion that abuts against the skirt portion inserted into the recess, and a base that is biased to abut against the protruding portion at the deepest position within the predetermined range and bends inward. department The engaging arm portion 、 A spacer equipped with, This is an antenna connection structure that includes [something]. 2) An antenna comprising: a rod-shaped structure with an annular skirt portion extending axially from the base end face; a circumferential groove formed on the outer surface at a predetermined distance from the base end face toward the tip; and a terminal base portion protruding axially from the base end face with a male threaded portion formed on its circumferential surface; The main body of the radio has a peripheral wall and a bottom wall. 、 The antenna has a cylindrical hole-shaped recess into which the skirt portion can be inserted, a protrusion formed on a part of the peripheral wall portion so as to protrude inward, and a contact that electrically connects to the terminal base. A main body terminal base having, An antenna connection part comprising a protruding terminal portion having a female thread portion that screws into the male thread portion of the terminal base, A portion is inserted into the recess so as to be movable within a predetermined range in the axial direction, and comprises a bank portion that abuts against the skirt portion inserted into the recess, and a base portion that is biased to abut against the protruding portion at the deepest position within the predetermined range and bends inward. and An engagement formed on the tip side of the base that engages with the circumferential groove when the base bends inward. department The engaging arm portion、 A spacer equipped with, This is an antenna connection structure that includes [something]. 3) The main body and, An antenna detachably attached to the main body, comprising a rod-shaped structure, an annular skirt portion extending axially from the base end face, and a terminal base portion protruding axially from the base end face, The main body is provided and has a peripheral wall and a bottom wall. 、 An antenna connection portion comprising: a cylindrical hole-shaped recess formed into which the skirt portion of the antenna can be inserted; a protruding portion formed to project inward from a part of the peripheral wall; and a main terminal base having a contact that electrically connects to the terminal base; A base is inserted into the recess so as to be movable within a predetermined range in the axial direction, and has a bank portion that abuts against the skirt portion inserted into the recess, and a base that is biased to abut against the protruding portion at the deepest position within the predetermined range and bends inward. department The engaging arm portion 、 A spacer equipped with, It is a portable radio that includes [a specific component]. 4) The main body and, An antenna is detachably attached to the main body, comprising: a rod-shaped structure with an annular skirt portion extending axially from the base end face; a circumferential groove formed on the outer surface at a predetermined distance from the base end face toward the tip; and a terminal base portion protruding axially from the base end face with a male threaded portion formed on its circumferential surface. The main body is provided and has a peripheral wall and a bottom wall. 、 The antenna has a cylindrical hole-shaped recess into which the skirt portion can be inserted, a protrusion formed on a part of the peripheral wall portion so as to protrude inward, and a contact that electrically connects to the terminal base. A main body terminal base having, The terminal base has a female threaded portion that screws into the male threaded portion. Projecting terminal part And, an antenna connection section equipped with, A portion is inserted into the recess so as to be movable within a predetermined range in the axial direction, and comprises a bank portion that abuts against the skirt portion inserted into the recess, and a base portion that is biased to abut against the protruding portion at the deepest position within the predetermined range and bends inward. andAn engaging portion formed on the tip side of the base and engaging with the circumferential groove when the base is bent inward department having an engaging arm portion and 、 a spacer provided with the same, and a mobile radio device configured to include the same.

Advantages of the Invention

[0008] According to one aspect of the present invention, an effect that the antenna is difficult to come off from the main body can be obtained.

Brief Description of the Drawings

[0009] [Figure 1] FIG. 1 is a front view showing a radio device 91 which is an example of a mobile radio device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a view showing an attachment / detachment mode of an antenna 2 with respect to a main body portion 1 of the radio device 91. [Figure 3] FIG. 3 is a partial cross-sectional view for explaining an end structure of the antenna 2. [Figure 4] FIG. 4 is a top view of a housing 11 in the main body portion 1. [Figure 5A] FIG. 5A is a cross-sectional view taken at positions S5A - S5A in FIG. 4. [Figure 5B] FIG. 5B is a partial top view of FIG. 5A. [Figure 6] FIG. 6 is a cross-sectional view taken at positions S6 - S6 in FIG. 4. [Figure 7] FIG. 7 is an assembly view of an antenna connection structure SK. [Figure 8] FIG. 8 is a cross-sectional view of an antenna connection portion 12 in the main body portion 1. [Figure 9] FIG. 9 is another cross-sectional view of the antenna connection portion 12. [Figure 10] FIG. 10 is a first diagram for explaining an attachment procedure of the antenna 2 to the antenna connection portion 12. [Figure 11] FIG. 11 is a second diagram for explaining an attachment procedure of the antenna 2 to the antenna connection portion 12.

Modes for Carrying Out the Invention

[0010] An antenna connection structure and a portable radio according to an embodiment of the present invention will be explained using the antenna connection structure SK and radio 91 of the embodiment.

[0011] Figure 1 is a front view of the radio 91. For the sake of explanation, the up, down, left, and right directions are indicated by arrows in Figure 1. In addition, the front is the front of the page in Figure 1, and the rear is the back of the page in Figure 1. The radio 91 is a portable radio and comprises a main body 1 with a roughly rectangular prism-shaped housing 11 that can be held in one hand, and an antenna 2 that is detachably attached to the main body 1. The housing 11 is made of resin.

[0012] Figure 2 shows how the antenna 2 is attached and detached. The antenna 2 can be attached and detached from the antenna connection part 12 provided on the upper surface 11a of the housing 11 by a screw structure.

[0013] Figure 3 is a partial cross-sectional view showing the structure of the base portion (lower side in Figure 1) of antenna 2. Antenna 2 is formed in the shape of a round rod, with the tip (upper side in Figure 1) being slightly tapered. Antenna 2 has a circumferential groove 2b formed around its entire circumference at a predetermined distance from the base end toward the tip on its outer surface.

[0014] Antenna 2 has a skirt portion 2a, a terminal base portion 21, and a terminal core portion 23 at its base end. The skirt portion 2a is the outer edge portion of the antenna 2 that extends downward in an annular shape in the direction of the axis CL2 from the root end face 2c, which is the end face on the root side. The terminal base 21 is a cylindrical member that protrudes downward on the axis of the antenna 2 at the root end face 2c of the antenna 2. The axis of the antenna 2 is axis CL2. A recess 21b is formed on the lower surface of the terminal base 21, which is carved out upward with axis CL2 as the center. The recess 21b is circular when viewed from below. A male threaded portion 21a is formed on the circumferential surface of the terminal base portion 21. The terminal core portion 23 is formed in a cylindrical shape with an outer diameter smaller than the inner diameter of the recess 21b. The terminal core portion 23 is mounted so that its lower tip is flush with the bottom surface of the recess 21b. An elongated contact hole 23a is formed in the center of the terminal core portion 23. The contact hole 23a is the female contact in the connection part that electrically connects the antenna 2 and the main body portion 1.

[0015] Next, the antenna connection section 12 will be described in detail with reference to Figures 4 to 9. Figure 4 is a top view of the housing 11 in the main body section 1. Figure 5A is a cross-sectional view at position S5A-S5A in Figure 4, and Figure 5B is a partial top view of Figure 5A. Figure 6 is a cross-sectional view at position S6-S6 in Figure 4. Figure 7 is an assembly diagram of the antenna connection structure SK, Figure 8 is a cross-sectional view of the antenna connection section 12 in the main body section 1 corresponding to position S5A-S5A, and Figure 9 is a cross-sectional view corresponding to position S6-S6.

[0016] As shown in Figures 4, 5A, 5B, and 6, the antenna connection portion 12 is a recess 12m that is recessed downward on the upper surface 11a of the housing 11, centered on the vertically extending axis CL12, and is formed as a bottomed cylindrical hole with a peripheral wall portion 12a and a bottom wall portion 12e. The base portion of the antenna 2, including the skirt portion 2a, can be inserted into the recess 12m. The peripheral wall portion 12a is a peripheral wall that opens in a generally circular shape on the upper surface 11a of the housing 11 and extends parallel to the axis CL12. The bottom wall portion 12e extends in a ring shape perpendicular to the axis CL12.

[0017] The peripheral wall portion 12a has a pair of engaging recesses 12b, 12b at positions 180° opposite each other when viewed from above. The engaging recesses 12b have a back wall surface 12b1 that is recessed radially outward from the peripheral wall portion 12a and extends as a plane in the front-back and up-down directions. Each engaging recess 12b has a projection 12c located slightly above the center in the vertical direction, as shown in Figures 5A and 5B. That is, the projection 12c is formed as part of the peripheral wall 12a. The protruding portion 12c is a part that protrudes from the back wall surface 12b1 so as to approach the axis CL12, and has a top surface 12c1 which is a plane parallel to the back wall surface 12b1, and a guide inclined surface 12c2 which is connected to the upper end of the top surface 12c1 and is inclined so as to move upward away from the axis CL12 and connects to the back wall surface 12b1.

[0018] The peripheral wall portion 12a has a pair of regulating recesses 12d that are recessed radially outward at positions 180° opposite to the pair of engaging recesses 12b, at positions offset by 90° when viewed from above. Each regulating recess 12d has a regulating surface 12d1 at approximately the center in the vertical direction, as shown in Figures 5A and 6. The restricting surface 12d1 is a plane formed as a step that is perpendicular to the axis CL12 and faces downward. That is, the restricting recess 12d is divided by the restricting surface 12d1, with the lower side extending further away from the axis CL12 than the upper side.

[0019] As shown in Figures 5A and 6, a protruding terminal portion 122 is positioned in the central part of the bottom wall portion 12e, protruding upward. The protruding terminal portion 122 has a hole portion 122a, which is a round hole opening on the upper surface with the axis CL12 as its axis. A female thread portion 122b is formed on the inner surface of the opening side of the hole portion 122a. The main terminal base 123 is positioned within the hole 122a of the protruding terminal portion 122. The main terminal base 123 has a contact 123a that protrudes upward on the axis CL12. The contact 123a is formed to provide a tight fit that allows it to be inserted into the contact hole 23a of the antenna 2 by hand while making contact.

[0020] Figure 7 is an assembly diagram of the antenna connection structure SK. As shown in Figure 7, the antenna connection structure SK is composed of the structure of the antenna connection portion 12 in the housing 11 and the structure of the base portion of the antenna 2, and the spacer 3 inserted into the antenna connection portion 12.

[0021] The spacer 3 will be described with reference to Figures 7, 8, and 9. Figure 8 is a partial cross-sectional view corresponding to the cross-section at position S5A-S5A in Figure 4, with the spacer 3 attached to the antenna connection part 12. Figure 9 is a partial cross-sectional view corresponding to the cross-section at position S6-S6 in Figure 4, with the spacer 3 attached to the antenna connection part 12.

[0022] As shown in Figure 7, the spacer 3 has a bottom portion 31, an engaging arm portion 32, a restricting arm portion 33, and a bank portion 34, and is made of resin. The bottom portion 31 is an annular portion that extends in a perpendicular direction and has a central hole 31a with axis CL3 as its axis.

[0023] The engaging arm portion 32 is an arm-shaped part that connects to the outer edge of the base portion 31 and extends upward, and has a base portion 32a, an engaging portion 32b, and an outward projection portion 32c. The base portion 32a is a thin, plate-like part that extends upward in the radial direction, with its lower end connected to the edge of the bottom portion 31. The engaging portion 32b is a portion formed at the tip of the inner surface of the base portion 32a, protruding in a direction approaching the axis CL3, and its tip is formed in an arc shape when viewed from above. The engaging portion 32b engages with the circumferential groove 2b of the antenna 2. The external projection 32c is formed from the tip of the outer surface of the base 32a, slightly towards the center in the vertical direction, and protrudes outward. The external projection 32c is formed so that its vertical cross-sectional shape is arc-shaped.

[0024] The base 32a of the engaging arm 32 is flexible in the thickness direction with the root portion connected to the bottom 31 as a fulcrum (see arrow DRa in Figure 7).

[0025] The engaging arms 32 are formed in pairs at positions 180° opposite each other across the axis CL3 (positions corresponding to the left-right direction in Figure 7). As shown in Figure 8, in the natural state of the spacer 3, each engaging arm 32 is formed with a slight inclination such that the upper side is angled outward at an angle θ32 with respect to a reference line LNv parallel to the axis CL3.

[0026] As shown in Figure 7, the regulating arm 33 is an arm-shaped portion that connects to the outer edge of the base 31 and extends upward, and has a base portion 33a and a stopper portion 33b. The base portion 33a is a thin, plate-like part that extends upward and has its lower end connected to the edge of the bottom portion 31. The length of the base portion 33a is shorter than the length of the base portion 32a of the engaging arm portion 32, and is approximately half the length. The abutment portion 33b is a part that protrudes outward at the tip of the outer surface of the base portion 33a. The upper surface 33b1 of the abutment portion 33b is a plane perpendicular to the axis CL3 and, as shown in Figure 9, can contact the restricting surface 12d1 of the restricting recess 12d in the antenna connection portion 12.

[0027] The base portion 33a is flexible in the thickness direction with the root portion connected to the bottom portion 31 as a fulcrum (see arrow DRb in Figure 7).

[0028] As shown in Figures 7 and 9, the embankment portion 34 of the spacer 3 has the same inner diameter as the central hole 31a of the bottom portion 31 and is a wall-like portion that rises upward in an arc shape when viewed from above. The embankment portion 34 is divided into two arc-shaped portions by cutting out the portion corresponding to the engaging arm portion 32. As shown in Figure 9, the inner diameter of the embankment portion 34 is slightly larger than the outer diameter of the protruding terminal portion 122. The outer diameter of the embankment portion 34 is set such that its upper surface 34a interferes with the skirt portion 2a (see Figure 3) of the antenna 2, which is arranged concentrically.

[0029] The regulating arms 33 are formed in pairs at positions 180° opposite each other across the axis CL3 (in the front-rear direction in Figure 7). In other words, the pair of engaging arms 32 and the pair of restricting arms 33 are formed offset by 90° around the axis CL3.

[0030] The antenna connection structure SK is designed so that the spacer 3 is inserted into the antenna connection part 12 of the housing 11 in advance, and then the antenna 2 is attached and detached. Next, the procedure for attaching the spacer 3 to the antenna connection section 12 and attaching the antenna 2 will be described in detail.

[0031] As shown in Figure 7, the spacer 3 is inserted into the antenna connection portion 12 from above. At this time, the axis CL12 and the axis CL3 are aligned. In addition, the circumferential orientation of the spacer 3 is such that the engaging arm portion 32 and the restricting arm portion 33 are oriented to correspond to the engaging recess 12b and the restricting recess 12d of the antenna connection portion 12, respectively.

[0032] During the insertion of the spacer 3, the outward protrusion 32c of the engaging arm 32 and the back wall surface 12b1 of the engaging recess 12b of the antenna connection part 12 are in positions that do not interfere with each other. Therefore, the initial insertion of the spacer 3 into the antenna connection part 12 is not hindered by the engaging arm 32. On the other hand, as shown by the dashed line in Figure 9, the abutment portion 33b of the regulating arm portion 33 interferes with the first wall surface 12d2 on the opening side of the regulating recess 12d. Therefore, the spacer 3, which is pushed downward, slides down along the first wall surface 12d2 while the regulating arm 33 bends inward (see arrow DRc).

[0033] When the lower surface 31b of the bottom 31 of the spacer 3 reaches a predetermined position P1 above the bottom wall 12e of the antenna connection portion 12 of the housing 11, the abutment portion 33b of the regulating arm 33 passes the first wall surface 12d2, and the bending of the regulating arm 33 is eliminated (see solid line). Subsequently, when the spacer 3 is lifted, the abutment portion 33b comes into contact with the restricting surface 12d1 of the restricting recess 12d, thereby restricting the spacer 3 from moving any further upward.

[0034] In other words, the spacer 3 inserted into the antenna connection part 12 is movable in the vertical direction, which is the axial direction, within a predetermined range of distance H3 between the shallowest position P1 (shallowest position P1) and the deepest position P2 (deepest position P2) where the height position of the lower surface 31b of the bottom part 31 is in contact with the bottom wall part 12e.

[0035] When the lower surface 31b of the spacer 3 is at position P1, the outward projection 32c of the engaging arm 32 is located directly above the inductive inclined surface 12c2 of the projection 12c of the antenna connection part 12, as shown in Figure 8. As the spacer 3 is pushed downward from its shallowest position P1, the outer protrusion 32c slides along the guide inclined surface 12c2, and the base 32a is biased to contact the protrusion 12c and bends inward. Furthermore, with the outer protrusion 32c sliding along the top surface 12c1, the lower surface 31b contacts the bottom wall 12e, reaching the deepest position P2 (see the dashed line in Figure 8). In other words, when the spacer 3 moves up and down between position P1 and the deepest position P2, a frictional force is generated between the outward protrusion 32c and the top surface 12c1, corresponding to the bending repulsive force of the base 32a of the engaging arm 32.

[0036] Next, the procedure for attaching the antenna 2 with the spacer 3 inserted into the antenna connection part 12 will be explained with reference to Figures 10 and 11. Figure 10 is a first diagram illustrating the procedure for attaching the antenna 2 to the antenna connection part 12, and Figure 11 is a second diagram illustrating the procedure for attaching the antenna 2 to the antenna connection part 12.

[0037] Insert the antenna 2 into the antenna connection section 12, which already has the spacer 3 inserted, from above, aligning the axis CL12 with the axis CL2. The base side of the antenna 2, where the skirt portion 2a is formed, can enter a certain distance without interfering with the spacer 3. Once the base side of the antenna 2 has entered a certain distance, the male threaded portion 21a of the terminal base portion 21 of the antenna 2 and the female threaded portion 122b of the protruding terminal portion 122 of the antenna connection section 12 can be screwed together, so rotate the antenna 2 to screw it in further.

[0038] When the antenna 2 is screwed in further, the lower surface 2a1 of the skirt portion 2a comes into contact with the upper surface 34a of the bank portion 34 of the spacer 3. Figure 10 shows this state. At this point, the contact 123a of the main terminal base portion 123 enters while making contact with the contact hole 23a of the terminal core portion 23, ensuring electrical connection. Also, the engaging portion 32b of the spacer 3 is in a position corresponding to the circumferential groove 2b of the antenna 2, separated from it.

[0039] When the antenna 2 is screwed in further, the lower surface 2a1 of the skirt portion 2a pushes the embankment portion 34 downwards, causing the spacer 3 to move downwards. As a result, as shown in Figure 11, the outward protrusion 32c of the engaging arm 32 of the spacer 3 rides up onto the protrusion 12c of the antenna connection part 12, causing the base 32a to bend inward. When the base 32a bends inward, the engaging tip 32b enters and engages with the circumferential groove 2b of the antenna 2. As the antenna 2 is further screwed in, the spacer 3 is pushed down further, and the lower surface 31b of the bottom 31 comes into contact with the bottom wall 12e and is tightened firmly, completing the attachment of the antenna 2 to the antenna connection part 12 (as shown in Figure 11).

[0040] If, while the antenna 2 is attached to the antenna connection part 12, an external force is applied to the antenna 2 in a rotational direction that loosens the screw (hereinafter referred to as the detachment rotation direction), a frictional force is generated between the circumferential groove 2b and the engaging part 32b that is engaged with the circumferential groove 2b, in a direction that opposes rotation in the circumferential direction. This makes it possible to intentionally detach antenna 2 by applying a force in the direction of detachment rotation that resists the torque corresponding to the frictional force, using a finger or the like.

[0041] On the other hand, even if an unintended external force in the direction of detachment rotation is applied to the antenna 2, the antenna 2 will not rotate or loosen unless the force generates a torque that counteracts the torque corresponding to the frictional force between the circumferential groove 2b and the engaging portion 32b. As a result, the antenna connection structure SK and the radio 91 are designed so that the attached antenna 2 is less likely to loosen and less likely to detach from the main body 1.

[0042] Furthermore, when a force in the detachment rotation direction is applied to antenna 2, which generates a torque that counteracts the torque corresponding to the frictional force, and antenna 2 attempts to rotate, it will lift spacer 3. However, as described above, a frictional force is generated between the outer protrusion 32c and the top surface 12c1 of the protrusion 12c of spacer 3 in a direction that prevents the upward movement of spacer 3 in the insertion and removal direction. This frictional force also increases the external force required to rotate antenna 2, making it more difficult for antenna 2 to rotate. As a result, the antenna connection structure SK and the radio unit 91 are less likely to loosen the attached antenna 2 and less likely to detach from the main unit 1. Thus, the antenna connection structure SK and the radio 91 can more effectively prevent the antenna 2 from detaching from the main body 1 when an unintended external force is applied to the attached antenna 2 in the direction of detachment, because the rotation of the antenna 2 due to screwing back is prevented by frictional forces in both the rotational direction and the insertion / removal direction (axial direction).

[0043] The embodiments described in detail above are not limited to their configurations, and modified versions may be provided without departing from the spirit of the present invention.

[0044] The attachment and detachment structure of antenna 2 to antenna connection part 12 may be a male-female plug-in structure instead of the screw structure described above. Specifically, in Figure 10, the female screw portion 122b of the protruding terminal portion 122 of antenna connection part 12 is eliminated, and the male screw portion 21a of the terminal base portion 21 of antenna 2 is eliminated. The hole portion 122a of the protruding terminal portion 122 and the terminal base portion 21 are made to be insertable and removable with a certain insertion and removal force that is relatively easy to apply by hand.

[0045] In this structure, after the antenna 2 is inserted a certain distance into the antenna connection part 12, a frictional force in the insertion / removal direction generated between the outward protrusion 32c and the top surface 12c1 is applied to the insertion force until the insertion is complete. Similarly, when removing the antenna 2, this frictional force in the insertion / removal direction is applied to the removal force until it is removed a certain distance. In other words, the antenna 2 can be inserted and removed relatively easily with relatively little force, while the possibility of the antenna 2 coming out due to unintended external force is reduced, making it difficult for the antenna 2 to detach from the main body 1. [Explanation of Symbols]

[0046] 1. Main body 11 cabinets 11a Top side 12 Antenna connection section 12a Peripheral wall part 12b engaging concave part 12b1 inner wall surface 12c protruding part 12c1 top surface 12c2 guiding inclined surface 12d regulating concave part 12d1 regulating surface 12d2 first wall surface 12e bottom wall part 12m concave part 122 protruding terminal part 122a hole part 122b female screw part 123 body terminal base 123a contactor 2 antenna 2a skirt part 2a1 bottom surface 2b circumferential groove 2c root end face 21 terminal base 21a male screw part 21b concave part 23 terminal core part 23a contact hole 3 spacer 31 bottom part 31a center hole 31b bottom surface 32 engaging arm part 32a base part 32b engaging part 32c outer protruding part 33 regulating arm part 33a base part 33b abutting part 33b1 top surface 34 soil part 34a top surface 91 radio device (portable radio device) CL2, CL3, CL12 axes H3 distance LNv reference line P1 position (shallowest position) P2 position (deepest position) SK antenna connection structure θ32 angle

Claims

1. An antenna comprising a rod-shaped structure, an annular skirt portion extending axially from the base end face, and a terminal base portion protruding axially from the base end face, The main body of the radio has a peripheral wall and a bottom wall, and is formed as a cylindrical hole-shaped recess into which the skirt portion of the antenna can be inserted, and includes a projection formed to protrude inward from a part of the peripheral wall, and a main terminal base having a contact that electrically connects to the terminal base, A spacer comprising: an insertable portion that is positioned to move within a predetermined range in the axial direction within the recess, an embankment portion that abuts against the skirt portion inserted into the recess, and an engaging arm portion that is biased to abut against the protruding portion at the deepest position within the predetermined range and bends inward; Antenna connection structure including.

2. An antenna comprising: a rod-shaped structure with an annular skirt portion extending axially from the base end face; a circumferential groove formed on the outer surface at a predetermined distance from the base end face toward the tip; and a terminal base portion protruding axially from the base end face with a male threaded portion formed on its circumferential surface. The main body of the radio has a peripheral wall and a bottom wall, and is formed as a cylindrical hole-shaped recess into which the skirt portion of the antenna can be inserted, and includes a projection formed to protrude inward from a part of the peripheral wall, a main terminal base having a contact that electrically connects to the terminal base, and a protruding terminal portion having a female screw that screws into the male screw portion of the terminal base, A spacer comprising: an insertable and movable spacer in the recess, the spacer having a bank portion that abuts against the skirt portion inserted into the recess, a base portion that is biased to abut against the protrusion at the deepest position within the predetermined range and bends inward, and an engaging arm portion formed on the tip side of the base portion that engages with the circumferential groove when the base portion bends inward; Antenna connection structure including.

3. The antenna connection structure according to claim 1 or 2, wherein the spacer has a restricting arm portion that, when in the shallowest position within the predetermined range, contacts the recess and restricts movement in the shallower direction.

4. The main body and An antenna detachably attached to the main body, comprising a rod-shaped structure, an annular skirt portion extending axially from the base end face, and a terminal base portion protruding axially from the base end face, An antenna connection part provided on the main body, having a peripheral wall and a bottom wall, formed as a cylindrical hole-shaped recess into which the skirt portion of the antenna can be inserted, a protrusion formed to protrude inward from a part of the peripheral wall, and a main body terminal base having a contact that electrically connects to the terminal base, A spacer comprising: an insertable portion that is positioned to move within a predetermined range in the axial direction within the recess, an embankment portion that abuts against the skirt portion inserted into the recess, and an engaging arm portion that is biased to abut against the protruding portion at the deepest position within the predetermined range and bends inward; A portable radio consisting of the following components.

5. The main body and An antenna is detachably attached to the main body, comprising: a rod-shaped structure with an annular skirt portion extending axially from the base end face; a circumferential groove formed on the outer surface at a predetermined distance from the base end face toward the tip; and a terminal base portion protruding axially from the base end face with a male threaded portion formed on its circumferential surface. An antenna connection part comprising: provided on the main body, having a peripheral wall portion and a bottom wall portion, formed as a cylindrical hole-shaped recess into which the skirt portion of the antenna can be inserted, a protruding portion formed to protrude inward from a part of the peripheral wall portion, a main terminal base portion having a contact that electrically connects to the terminal base portion, and a protruding terminal portion having a female screw portion that screws into the male screw portion of the terminal base portion, A spacer comprising: an insertable and movable spacer in the recess, the spacer having a bank portion that abuts against the skirt portion inserted into the recess, a base portion that is biased to abut against the protrusion at the deepest position within the predetermined range and bends inward, and an engaging arm portion formed on the tip side of the base portion that engages with the circumferential groove when the base portion bends inward; A portable radio consisting of the following components.

Images