KR100815394B1 - Antenna feeding structure - Google Patents

Abstract

In an antenna feeding structure for electrically connecting a rotatable antenna to a circuit of a circuit board using a feeding bracket, the tip of the antenna rotating shaft 10 formed of a conductor protruding on one side of the antenna. Is formed in a spherical shape. The power supply bracket 2 includes an attachment portion 3 to the circuit board 6, an antenna contact connection portion 5 for contacting and contacting the distal end portion of the antenna rotation shaft 10, and an antenna contact connection portion 5. ) And an elastic support portion 4 which generates a bias force in a direction from the antenna contact connecting portion 5 toward the antenna rotation shaft 10. The antenna contact connecting portion 5 has a spherical concave surface in accordance with the spherical shape of the tip of the antenna rotation shaft 10, the spherical tip of the antenna rotating shaft 10 is a spherical concave surface of the antenna contact connecting portion 5 Contact with pressure.

Antenna feed structure, feeding bracket, attachment part, elastic support part, antenna contact connection part

Description

Antenna feed structure {ANTENNA FEEDING STRUCTURE}

The present invention relates to an antenna feeding structure for electrically connecting a rotatable antenna to a circuit of a circuit board using a power feeding bracket.

9 shows an external example of the card apparatus by a simplified schematic diagram. The card device 41 is pivotally disposed outside the card case 42, the circuit board 43 accommodated in the card case 42, and the outside of the card case 42. It is comprised with the antenna 44 electrically connected to the formed circuit (not shown).

An antenna rotation shaft 45 made of a conductor protrudes from one end side of the antenna 44, and the antenna rotation shaft 45 is inserted into the side wall of the card case 42 from the outside of the card case 42 to the inside. The through hole is formed. The antenna rotation shaft 45 is inserted into the card case 42 through a through hole for insertion of the antenna rotation shaft, and is electrically connected to a circuit formed on the circuit board 43. As a result, the antenna 44 is electrically connected to the circuit of the circuit board 43 through the antenna rotation shaft 45.

Patent Document 1: Japanese Patent Application Laid-Open No. 2001-339211

Patent Document 2: Japanese Patent Application Laid-Open No. 11-504771

However, since the antenna rotation shaft 45 rotates, it is not preferable to directly connect the antenna rotation shaft 45 to the circuit board 43 for various reasons due to the rotation of the antenna rotation shaft 45. In this regard, for example, a power supply bracket 46 as shown in the model diagram of FIG. 10 is proposed. The power supply bracket 46 is for electrically connecting the antenna rotation shaft 45 to the circuit of the circuit board 43 without directly connecting the antenna rotation shaft 45 to the circuit board 43.

The power supply bracket 46 is entirely composed of a conductor. The power supply bracket 46 includes an attachment portion 47 to the circuit board 43, an antenna contact connection portion 48 that is in contact with the antenna rotation shaft 45, and an antenna contact connection portion 48. It is comprised with the elastic support part 49 which elastically supports. The elastic support part 49 has elasticity (spring property) which can generate the bias force of the direction from the antenna contact connection part 48 toward the antenna rotation shaft 45. As shown in FIG.

The attachment portion 47 of the power feeding bracket 46 is electrically connected to the circuit of the circuit board 43. When the antenna rotation shaft 45 presses and electrically connects to the antenna contact connecting portion 48 of the power supply bracket 46, the antenna 44 connects the antenna rotation shaft 45 and the power supply bracket 46 to each other. It is electrically connected to the circuit of the circuit board 43 through this.

As such, by using the power supply bracket 46 shown in FIG. 10, the antenna 44 is electrically connected to the circuit of the circuit board 43 without directly connecting the antenna rotation shaft 45 to the circuit board 43. You can connect. However, by using the power supply bracket 46 as shown in FIG. 10, the following problems arise.

That is, the front end surface of the antenna rotation shaft 45 has a spherical shape, whereas the antenna rotation shaft contact portion of the antenna contact connecting portion 48 of the power supply bracket 46 has a planar shape. For this reason, the antenna rotation shaft 45 and the antenna contact connecting portion 48 of the power supply bracket 46 are in point contact, and the contact area is very narrow. In addition, since the antenna rotation shaft 45 is easy to be shaken by the rotation of the antenna 44, when the antenna 44 rotates, the antenna rotation shaft 45 at the antenna contact connecting portion 48 of the power supply bracket 46 is rotated. The contact position of is likely to change. In this way, the contact area between the antenna rotation shaft 45 and the antenna contact connecting portion 48 is narrow, and the contact position of the antenna rotation shaft 45 in the antenna contact connecting portion 48 is easy to change, so that the antenna rotation shaft 45 ) Stably contacting the antenna contact connecting portion 48 (in other words, obtaining stability of electrical connection between the antenna 44 and the circuit of the circuit board 43) is difficult.

In addition, the space | interval between the circuit board 43 and the antenna rotation shaft 45 is determined by various factors, and the freedom degree of design of the space | interval between the circuit board 43 and the antenna rotation shaft 45 is low. For this reason, in the case where the contact pressure between the antenna rotation shaft 45 and the antenna contact connecting portion 48 of the power supply bracket 46 is to be varied, for example, the power supply bracket 46 for the circuit board 43 may be used. In order to change the attachment position of or the elastic force of the elastic support portion 49 of the power supply bracket 46, a design change of the power supply bracket 46 is performed. However, since the distance between the circuit board 43 and the antenna rotation shaft 45 is narrow, the movable range of the attachment position of the power feeding bracket 46 is narrow. For this reason, it is almost impossible to adjust the contact pressure of the antenna rotation shaft 45 and the antenna contact connecting portion 48 by adjusting the attachment position of the power feeding bracket 46. In addition, since the design of the power feeding bracket 46 is carried out in consideration of various points such as material cost and manufacturing process, the design of the power feeding bracket 46 has many limitations. For this reason, the design change for changing the elastic force of the elastic support part 49 is difficult. Therefore, in the structure of the power supply bracket 46 shown in FIG. 10, there exists a problem that adjustment of the contact pressure between the antenna rotation shaft 45 and the antenna contact connection part 48 of the power supply bracket 46 is difficult.

This invention has the structure shown next, and makes it a means for solving the said subject. In other words, the present invention provides an antenna feeding structure for electrically connecting a rotatable antenna to a circuit of a circuit board using a power feeding bracket, wherein an antenna rotating shaft made of a conductor protrudes from one end side of the antenna. The tip of is formed in a spherical shape, and the power feeding bracket supports the attachment portion to the circuit board, the antenna contact connecting portion for contacting the tip of the antenna rotation shaft, and the antenna contact connecting portion from the antenna contact connecting portion. And an elastic support portion for generating a bias force in a direction toward the antenna rotation axis, wherein the antenna contact connecting portion of the power supply bracket has a spherical concave shape according to the spherical shape of the tip end portion of the antenna rotation axis, and a spherical shape of the antenna rotation axis. The tip is pressed against the spherical concave surface of the antenna contact connector. And is connected to the antenna contact connecting portion.

Effect of the Invention

According to the present invention, the tip end of the antenna rotation shaft protruding from one end side of the antenna is formed in a spherical shape. The antenna contact connecting portion of the power feeding bracket to which the distal end of the antenna rotation shaft is in contact has a spherical concave surface corresponding to the spherical shape of the distal end of the antenna rotation shaft. The spherical tip of the antenna contact connecting portion was configured to be press-contacted with the spherical concave surface of the antenna contact connecting portion. With this configuration, the contact between the tip end portion of the antenna rotation shaft and the antenna contact connecting portion becomes contact between the curved surfaces, and the contact area can be increased more than the point contact state between the flat and curved surfaces.

In addition, since the antenna contact connecting portion is supported by the elastic support portion, the arrangement position of the antenna contact connecting portion can be displaced by the elastic deformation of the elastic support portion. This and the antenna rotation shaft and the antenna contact connecting portion are pressed contacts between the curved surfaces, whereby the following effects can be obtained. In other words, the state in which the tip of the antenna rotation shaft and the antenna contact connecting portion are in pressure contact with the deepest portion of the spherical concave surface of the antenna contact connecting portion is most stable. However, the rotation of the antenna may cause the antenna rotation axis to shake, or position shift of the antenna rotation axis occurs in the assembling process, resulting in unstable contact connection between the antenna rotation axis and the antenna contact connecting portion. In this case, in the present invention, the tip end portion of the antenna rotation shaft moves relatively toward the deepest portion of the concave surface so as to slide itself on the spherical surface of the concave surface of the antenna contact connecting portion, so that the antenna rotation shaft and the antenna contact connecting portion are most stable in contact connection. You can correct your own position. In other words, by providing the characteristic structure in this invention, an antenna rotation shaft and an antenna contact connection part can perform self-alignment operation.

As described above, by providing the configuration of the present invention, the contact area between the antenna rotation shaft and the antenna contact connecting portion can be increased, and the self-alignment operation can be performed on the antenna rotation shaft and the antenna contact connecting portion. In this regard, the stability of contact connection between the antenna rotation shaft and the power supply bracket (antenna contact connecting portion) can be improved. In other words, the reliability of the electrical connection between the antenna and the circuit of the circuit board can be improved.

In addition, if the arrangement positions of the front end portions of the antenna rotation shaft are the same, if the depth of the concave surface of the antenna contact connecting portion of the power supply bracket is changed, the amount of elastic deformation of the elastic support portion is changed, and the biasing force from the antenna contact connecting portion to the antenna rotation shaft (付 勢力) (The contact pressure between the antenna contact connecting portion and the antenna shaft) changes. Thus, in the structure of this invention, only the depth of the concave surface of an antenna contact connection part is adjusted, the contact pressure of an antenna contact connection part and an antenna rotation shaft can be adjusted variably. Since it is simple to vary the depth of the concave surface of the antenna contact connecting portion (design change), it is easy to adjust the contact pressure between the antenna contact connecting portion and the antenna rotation shaft to a contact pressure that meets the needs. Further, for example, a design change is performed such that the distance between the tip of the antenna rotation shaft and the circuit board is changed, and the contact pressure between the antenna rotation shaft and the antenna contact connecting portion changes in a state before the power supply bracket is changed. In the case of discarding, only by variably adjusting the depth of the concave surface of the antenna contact connecting portion, it becomes easy to make contact contact between the antenna rotation shaft and the antenna contact connecting portion at the same contact pressure as the contact pressure before the design change. That is, by providing the characteristic structure in this invention, it becomes possible to respond quickly to a design change.

1 is a schematic plan view for explaining the antenna feeding structure of the first embodiment.

2A is a plan view for explaining a power feeding bracket constituting the antenna power feeding structure of the first embodiment.

Fig. 2B is a side view for explaining the power feeding bracket constituting the antenna power feeding structure of the first embodiment.

Fig. 2C is an enlarged plan view of the antenna contact connecting portion of the power feeding bracket constituting the antenna feeding structure of the first embodiment.

FIG. 2D is a schematic cross-sectional view of the portion b-b in FIG. 2C.

FIG. 3A is a view for explaining an example of adjusting the contact pressure of the antenna rotation shaft and the antenna contact connecting portion in the antenna power feeding structure of the first embodiment together with FIG. 3B.

3B is a view for explaining an example of adjusting the contact pressure of the antenna rotation shaft and the antenna contact connecting portion in the antenna power feeding structure of the first embodiment together with FIG. 3A.

4A is a view for explaining another example of adjusting the contact pressure of the antenna rotation shaft and the antenna contact connecting portion in the antenna power feeding structure of the first embodiment together with FIG. 4B.

4B is a view for explaining another example of adjustment of the contact pressure of the antenna rotating shaft and the antenna contact connecting portion in the antenna feeding structure of the first embodiment together with FIG. 4A.

FIG. 5A is a view for explaining one of the effects obtained from the antenna feeding structure of the first embodiment together with FIG. 5B.

FIG. 5B is a view for explaining one of the effects obtained from the antenna feeding structure of the first embodiment together with FIG. 5A.

Fig. 6A is a diagram schematically showing an example of the shape of the elastic support of the power feeding bracket in the antenna power feeding structure of the second embodiment.

FIG. 6B is a diagram schematically showing another example of the elastic support of the power feeding bracket in the antenna power feeding structure of the second embodiment. FIG.

Fig. 7A is a side view for explaining a connection portion between an elastic support portion and an antenna contact connecting portion in the antenna feeding structure of the third embodiment.

FIG. 7B is a schematic plan view when the connecting portion between the elastic support portion and the antenna contact connecting portion is seen from above in FIG. 7A.

FIG. 7C is a schematic cross-sectional view of the C-C portion in FIG. 7B.

8 is a model diagram for explaining the antenna feeding structure of the fourth embodiment.

9 is a model diagram schematically showing an example of a card-type device having an antenna feeding structure.

10 is a model diagram showing a conventional example of a power feeding bracket.

<Description of the code>

1: antenna feeding structure 2: feeding bracket

3: attachment portion 4: elastic support portion

5: antenna contact connection 6: circuit board

8: concave surface 10: antenna rotation axis

12: curved deformable portion 13: rib

15: antenna base plate 16: elastic portion

EMBODIMENT OF THE INVENTION Below, the Example which concerns on this invention is described based on drawing.

In Fig. 1, the antenna feeding structure of the first embodiment is shown by a schematic plan view. The antenna feeding structure 1 of the first embodiment is formed in a device such as a card device (for example, a PC card) having a wireless communication function as shown in FIG. 9, for example. The antenna feeding structure 1 is configured with a power feeding bracket 2 for electrically connecting a rotatable antenna to a circuit of a circuit board. In FIG. 2A, the power supply bracket 2 is pulled out and shown by a schematic plan view. 2B, the typical side view at the time of seeing the power supply bracket 2 from the right side of FIG. 2A is shown.

The power supply bracket 2 is entirely composed of a conductor plate, and includes an attachment portion 3 to the circuit board, an elastic support portion 4 extending from the attachment portion 3, and the elastic support portion 4. The antenna contact connecting part 5 formed in the extension front end part of () is comprised.

That is, the attachment part 3 is a component part for attaching the power supply bracket 2 to the circuit board. If the attachment part 3 is a structure which can attach the power supply bracket 2 to a circuit board, the structure is not specifically limited, In the example shown in FIG. 1, FIG. 2A, or FIG. 2B, the attachment part 3 The square plate portion 3a, the positioning plate portion 3b formed by bending one side of the plate portion 3a in a direction substantially orthogonal to the plate portion 3a, and the other portion of the plate portion 3a. It is comprised with the leg part 3c extended in the same direction as the protrusion direction of the positioning board part 3b from the side.

As shown in FIG. 1, the flat plate portion 3a of the attachment portion 3 is disposed opposite to the substrate surface of the circuit board 6, and the plate surface of the positioning plate portion 3b is the circuit board 6. The attachment portion 3 is in contact with the end surface of the circuit board 6, and the leg portion 3c is inserted into the hole portion 7 for attaching the metal fitting for the power supply provided in the circuit board 6. Is placed on. The electrode pad (not shown) which functions as an antenna connection part of the circuit formed in the circuit board 6 is formed in the board | substrate surface part of the circuit board 6 in which the attachment part 3 is arrange | positioned in this way. The electrode pad and the attachment portion 3 are bonded to each other by a conductive bonding material such as solder, so that the power supply bracket 2 is fixed to the circuit board 6 and the circuit of the circuit board 6. Is electrically connected to the.

In this first embodiment, the elastic support portion 4 of the power supply bracket 2 is provided with a plate member extending from the side edge of the positioning plate portion 3b of the attachment portion 3. It is composed by. The plate member is formed in a shape that is bent in a bending direction at a position halfway from the side edge of the positioning plate portion 3b toward the extension tip side. The elastic support member 4 which consists of this board member is arrange | positioned in the same posture as the board surface of a board member follows the cross section of the circuit board 6. The elastic support member 4 is elastically deformable in the bent portion so that the portion on the front end side of the bent portion can be elastically displaced in the direction A shown in Fig. 2A.

In this first embodiment, the antenna rotation shaft 10 protrudes from one end side of the antenna, and the tip of the antenna rotation shaft 10 has a spherical shape (see Fig. 1). An antenna contact connecting portion 5 is formed on the extension tip side of the elastic support 4, and this antenna contact connecting portion 5 is a portion where the tip portion of such an antenna rotation shaft 10 is in contact with each other. In FIG. 2C, the antenna contact connecting part 5 seen from the S direction shown in FIG. 2A is typically shown, and sectional drawing of the b-b part shown in FIG. 2C is typically shown in FIG. 2D.

The antenna contact connecting portion 5 has a spherical concave surface 8 in accordance with the spherical shape of the tip of the antenna rotation shaft 10, and the tip end portion of the antenna rotation shaft 10 is in pressure contact with the concave surface 8. In this first embodiment, the concave surface 8 is formed by extrusion processing, and the spherical radius of curvature R of the concave surface 8 is the spherical radius of curvature of the distal end portion of the antenna rotation shaft 10. It is larger than (r) (R> r).

In this first embodiment, the elastic force of the bent portion of the elastic support 4 so as to stably maintain the contact connection state between the tip end of the antenna rotation shaft 10 and the concave surface 8 of the antenna contact connecting portion 5. On the basis of this, a biasing force is applied from the antenna contact connecting portion 5 to the tip end of the antenna rotation shaft 10. The magnitude of the subordinate force can be adjusted not only by the rigidity of the elastic support part 4, but also by the depth of the concave surface 8. This is because the depth of the concave surface 8 is related to the amount of elastic deformation of the bent portion of the elastic support 4.

For example, in the example shown in FIG. 3A, the distance between the distal end of the antenna rotation shaft 10 and the cross-sectional position of the circuit board 6 is Da, and the depth of the concave surface 8 of the antenna contact connecting portion 5 is Ha. Assume that the magnitude (contact pressure) of the subordinate force from the antenna contact connecting portion 5 to the antenna rotation shaft 10 in this state is F. In contrast, in the example shown in FIG. 3B, the depth Hb of the concave surface 8 of the antenna contact connecting portion 5 is smaller than the depth Ha of the concave surface 8 illustrated in FIG. 3A. Other than that is the same condition as the example of FIG. 3A. In the case of this FIG. 3B, the elastic deformation amount of the elastic support part 4 is large compared with the example of FIG. 3A so that the depth of the concave surface 8 of the antenna contact connection part 5 becomes shallow. For this reason, the magnitude | size F 'of the subordinate force applied to the antenna axis 10 from the antenna contact connection part 5 becomes larger than the magnitude | size F of the subordinate force of the example of FIG. 3A (F'> F).

Further, for example, due to a design change, the interval between the tip end of the antenna rotation shaft 10 and the cross-sectional position of the circuit board 6 is the interval Da as shown in FIG. When the depth of the concave surface 8 of the antenna contact connecting portion 5 remains the same as Hc as before the design change, when the depth of the gap Db is narrowed, the amount of elastic deformation of the bent portion of the elastic support portion 4 becomes large. . For this reason, the magnitude of the subordinate force applied to the antenna rotation shaft 10 from the antenna contact connecting portion 5 increases, and the contact pressure between the tip end of the antenna rotation shaft 10 and the concave surface 8 of the antenna contact connecting portion 5 is increased. Grows On the contrary, for example, as shown in FIG. 4B, the depth of the concave surface 8 of the antenna contact connecting portion 5 is such that the amount of elastic deformation of the bent portion of the elastic support 4 is the same as that of FIG. 4A. Make Hd deeper than Hc before the design change. Thereby, the magnitude of the subordinate force applied from the antenna contact connecting portion 5 to the antenna rotating shaft 10 (in other words, the contact between the tip end of the antenna rotating shaft 10 and the concave surface 8 of the antenna contact connecting portion 5). The magnitude of the pressure) becomes equal to the design change conduction even after the design change.

In this way, by adjusting the depth of the concave surface 8 of the antenna contact connecting portion 5, the magnitude of the subordinate force applied to the antenna rotating shaft 10 from the antenna contact connecting portion 5, that is, of the antenna rotating shaft 10 The contact pressure between the tip portion and the concave surface 8 of the antenna contact connecting portion 5 can be adjusted.

In this first embodiment, the concave surface 8 of the antenna contact connecting portion 5 and the distal end portion of the antenna rotation shaft 10 are pressed contacts between curved surfaces, and the antenna contact connecting portion 5 is an elastic support which is elastically displaceable. It is supported by (4). This configuration can achieve the following effects. In other words, for example, as shown in the cross-sectional view of FIG. 5B, the central axis of rotation Lo of the antenna rotation shaft 10 coincides with the position of the deepest portion O of the concave surface 8 of the antenna contact connecting portion 5. Thus, the state in which the antenna rotation shaft 10 is in contact with the antenna contact connecting portion 5 is the most stable arrangement state between the antenna contact connecting portion 5 and the antenna rotation shaft 10. On the other hand, when the antenna feed structure 1 is assembled, for example, as shown in the cross-sectional view of FIG. 5A, the rotation center axis Lo of the antenna rotation shaft 10 and the concave surface of the antenna contact connecting portion 5. The position with respect to the deepest part O of (8) may shift | deviate, and the contact connection state of the antenna rotation shaft 10 and the antenna contact connection part 5 may become unstable. In this case, in the configuration of this first embodiment, the antenna rotation shaft 10 and the antenna contact connecting portion 5 such that the tip end of the antenna rotation shaft 10 follows the spherical surface of the concave surface 8 of the antenna contact connecting portion 5. Can be relatively displaced in the direction of stabilization. In other words, the antenna rotation shaft 10 and the antenna contact connecting portion 5 can perform self-alignment.

In addition, the antenna rotation shaft 10 is shaken by the rotation of the antenna, and as shown in FIG. 5A, the rotation center axis Lo of the antenna rotation shaft 10 is the deepest part of the concave surface 8 of the antenna contact connecting portion 5. Even when shifted from (O), the antenna rotation shaft 10 and the antenna contact connecting portion 5 can operate in the same self-alignment and can be displaced in the most stable state.

This second embodiment will be described below. In addition, in description of this 2nd Embodiment, the same code | symbol is attached | subjected to the same structural part as 1st Embodiment, and the overlapping description of the common part is abbreviate | omitted.

In this second embodiment, as shown in FIG. 6A, the bent portion 12 of the elastic support 4 is thinner than other portions of the elastic support 4. For this reason, in the state where the antenna contact connecting portion 5 is supported by the attachment portion 3 through the elastic support portion 4, the direction of the subordinate force applied from the antenna contact connecting portion 5 to the antenna rotation shaft 10 is in the Z direction. In this case, the antenna contact connecting portion 5 can be displaced in three directions, the X direction and the Y direction and the Z direction orthogonal to each other. In other words, the tapered bent portion 12 of the elastic support 4 is a curved deformable portion.

Thus, by providing the curved deformable part 12 in the elastic support part 4, the operation | movement of the self-alignment with the antenna rotation shaft 10 and the antenna contact connection part 5 becomes smooth more. Thereby, it becomes easy to obtain stability of the contact connection of the antenna rotation shaft 10 of one layer and the antenna contact connection part 5 more. In this second embodiment, the configuration other than the configuration related to the curved deformable portion 12 is the same as that of the first embodiment.

On the other hand, the shape of the curved deformable part 12 of the elastic support part 4 is not limited to the example of FIG. 6A, and the three directions of the X direction, the Y direction, and the Z direction orthogonal to the antenna contact connection part 5 mutually Any form may be used as long as it can be displaced by For example, as shown in FIG. 6B, the curved deformable part 12 of the elastic support part 4 is a bent part, and the said bent part is thinner than the other part of the elastic support part 4, and is twisted. You may be. By setting the curved deformable portion 12 as shown in FIG. 6B, the curved deformable portion 12 smoothly displaces the displacement of the antenna contact connecting portion 5 in the XY plane than in the example of FIG. 6A. The antenna contact connecting portion 5 can easily achieve self-alignment.

The third embodiment will be described below. In addition, in description of this 3rd Example, the same code | symbol is attached | subjected to the same structural part as each 1st and 2nd Example, and the overlapping description of the common part is abbreviate | omitted.

In Fig. 7A, the connecting portion of the resilient support portion 4 and the antenna contact connecting portion 5, which is characteristic in the third embodiment, is pulled out and shown schematically, and in Fig. 7B, the elastic support portion 4 from the upper side shown in Fig. 7A is shown. And a schematic plan view of the junction with the antenna contact connecting portion 5 is shown, and a schematic cross-sectional view of the CC portion of FIG. 7B is shown in FIG. 7C. In this third embodiment, ribs 13 for strength reinforcement are formed at the connecting portion between the elastic support 4 and the antenna contact connecting portion 5 by extrusion processing.

Since the pressing force is applied to the antenna contact connecting portion 5 from the antenna rotation shaft 10, a force due to the pressing pressure is applied to the connection portion between the elastic support portion 4 and the antenna contact connecting portion 5. All. Due to the force, the connecting portion between the elastic support 4 and the antenna contact connecting portion 5 is warped and deformed, whereby the bias force from the antenna contact connecting portion 5 to the antenna rotation shaft 10 is weaker than the set value. There may be a case. In this case, the contact pressure between the tip end of the antenna rotation shaft 10 and the concave surface 8 of the antenna contact connecting portion 5 decreases. Due to the decrease in the contact pressure, the antenna rotation shaft 10 cannot be contacted with the antenna contact connecting portion 5 satisfactorily, which may cause a problem of poor connection such that the connection state between the antenna and the circuit board is deteriorated. have. In this case, as in the third embodiment, the rib 13 for strength reinforcement is formed at the joint portion of the elastic support 4 and the antenna contact connecting portion 5. As a result, the strength of the joint portion between the elastic support portion 4 and the antenna contact connecting portion 5 is strengthened, and the connection between the elastic support portion 4 and the antenna contact connecting portion 5 due to the pressing force from the antenna rotation shaft 10 is performed. The deflection of the part can be avoided. For this reason, it is possible to easily maintain the contact connection between the antenna rotation shaft 10 and the antenna contact connecting portion 5 at the contact pressure as designed, so that the circuit of the antenna and the circuit board through the antenna feeding structure 1 can be maintained. It is possible to improve the reliability of the electrical connection with the.

In this third embodiment, the configuration other than the configuration related to the ribs 13 for strength reinforcement is the same as in the first or second embodiment.

The fourth embodiment will be described below. In addition, in description of this 4th Example, the same code | symbol is attached | subjected to the same structural part as each of 1st-3rd Example, and the overlapping description of the common part is abbreviate | omitted.

In this fourth embodiment, as shown in Fig. 8, the elastic support 4 extends along the end face of the circuit board 6, with the end face and the distance between the circuit board 6 interposed therebetween. (15) and elasticity provision portions 16 (16a, 16b) formed by bending both end sides of the antenna support plate portion 15 in the refolding direction.

A spherical concave surface 8 is formed on a part of the plate surface of the antenna support plate portion 15 to form the antenna contact connecting portion 5. The distal end side of the elasticity imparting portion 16a is connected to the attachment portion 3, and the distal end side of the elasticity imparting portion 16b is in contact with the end face of the circuit board 6. Thereby, the antenna contact connection part 5 is an aspect supported by the elastic support part 4 by the aspect of both support shapes. In addition, the front end side of the elastic provision part 16b may be made into the structure connected to the attachment part 3, instead of contacting the end surface of the circuit board 6. As shown in FIG.

In this fourth embodiment, when the tip portion of the antenna rotation shaft 10 is pressed against the concave surface 8 of the antenna contact connecting portion 5, the bias force based on the elastic force by the elasticity applying portions 16a, 16b is the antenna. It is applied to the tip of the antenna shaft 10 from the contact connecting portion 5.

In this fourth embodiment, the configuration other than the configuration in which the elastic support portion 4 supports the antenna contact connecting portion 5 in both support shapes is the same as in the first to third embodiments. In other words, for example, as in the second embodiment, the elastic imparting portion 16 may have a configuration functioning as the curved deformable portion 12 of the elastic support portion 4, and, for example, As in the third embodiment, the joint portion between the elastic support portion 4 and the antenna contact connecting portion 5 may have a configuration in which ribs 13 for strength reinforcement are formed.

In this fourth embodiment, since the antenna contact connecting portion 5 is configured to be elastically supported by both support shapes, the stability of the arrangement of the antenna contact connecting portion 5 can be improved. In addition, compared to the case where the antenna contact connecting portion 5 is supported by the cantilever shape, the bias force applied to the antenna contact connecting portion 5 can be increased.

In addition, this invention is not limited to the form of each of the 1st-4th Example, A various embodiment can be employ | adopted. For example, in each of the first to fourth embodiments, the antenna feeding structure 1 has been shown to be formed in a card type device, but the antenna feeding structure of the present invention is a card having a wireless communication function. It is possible to equip not only a type | mold apparatus but also other wireless communication apparatus.

The present invention is applicable to an antenna feeding structure of a wireless communication device in which a rotatable antenna is formed. With the configuration of the present invention, the reliability of the electrical connection between the antenna and the circuit of the circuit board can be improved, and the connection work between the antenna rotation shaft and the power supply bracket can be performed simply and reliably. The present invention is particularly effective for applying to an antenna feeding structure of a small wireless communication device.

Claims (6)

In an antenna feeding structure for electrically connecting a rotatable antenna to a circuit of a circuit board using a feeding bracket, An antenna rotating shaft made of a conductor protrudes from one end side of the antenna, and the tip of the antenna rotating shaft is formed in a spherical shape. The power feeding bracket supports the attachment portion to the circuit board, the antenna contact connecting portion for contacting the tip of the antenna rotation shaft, the antenna contact connecting portion for the attachment portion, and the bias force in the direction from the antenna contact connecting portion to the antenna rotation shaft. It is composed of an elastic support part that generates a back force, The antenna contact connecting portion of the power supply bracket has a spherical concave surface according to the spherical shape of the tip end of the antenna rotation shaft, A spherical distal end portion of the antenna rotation shaft is pressed against the spherical concave surface of the antenna contact connecting portion and connected to the antenna contact connecting portion. The resilient support portion of the power supply bracket includes: an antenna support plate portion extending along the cross section of the circuit board at intervals between the end face and the interval of the circuit board, and both ends of the antenna support plate part are bent in the refolding direction; And an elastic provision portion formed by contacting the distal end side of the bent portion with the end face of the circuit board or by connecting to the attachment portion of the power supply bracket. A spherical concave surface is formed on a plate surface of a part of the antenna support plate portion to form an antenna contact connecting portion. At least one side of the elasticity provision part of the both ends of an antenna support plate part is electrically connected to an attachment part, The antenna feeding structure characterized by the above-mentioned. The antenna feeding structure according to claim 1, wherein a rib for strengthening strength is formed at a connection portion between the elastic support portion and the antenna contact connecting portion. The antenna feeding structure according to claim 2, wherein a rib for strength reinforcement is formed at a connection portion between the elastic support portion and the antenna contact connecting portion. The X and Y directions orthogonal to each other according to claim 1, wherein when the direction along the direction of the subordinate force applied to the antenna rotation axis from the antenna contact connecting portion is set as the Z direction while the antenna contact connecting portion is supported by the attachment portion, And an elastically deformable portion that is capable of displacing the antenna contact connecting portion in three directions in the and Z directions. The X direction and the Y direction orthogonal to each other according to claim 2, wherein when the direction along the direction of the subordinate force applied to the antenna rotation axis from the antenna contact connecting portion is set as the Z direction while the antenna contact connecting portion is supported by the attachment portion, And an elastically deformable portion that is capable of displacing the antenna contact connecting portion in three directions in the and Z directions.

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