Device housing case

Abstract

To surely enhance the reception sensitivity of an antenna built in a device.SOLUTION: A device housing case 100 includes: a fixing portion 1 to which a wristwatch 7, which is an arm-worn device incorporating the main antenna 73, is detachably engaged; and an auxiliary antenna 2 disposed inside the fixing portion 1. The wristwatch 7, which is the arm-worn device, has a band 72. The fixing portion 1 holds the wristwatch 7 so that the main antenna 73 is disposed near the auxiliary antenna 2 with the band 72 wrapped around the outer periphery of the fixing portion 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an apparatus housing case. [Background technology]

[0002] Currently, various countries (e.g. Germany, the United States, Japan, etc.) transmit long-wave standard time signals containing time data (time code). In recent years, so-called radio-controlled clocks that receive such standard radio waves and correct the current time data have been put to practical use. Radio-controlled clocks receive the standard radio waves via a built-in antenna at regular intervals, amplify and modulate the standard radio waves, and decode the time code to automatically correct the current time.

[0003] If a radio-controlled clock is unable to receive radio signals for a certain period of time, it will no longer be able to display the correct time. For this reason, it has been proposed to improve the reception sensitivity (reception performance) of the standard radio wave by providing an auxiliary antenna that is magnetically coupled to the antenna built into the watch. For example, Patent Document 1 describes an auxiliary antenna device that is provided with a stand on which a clock can be placed, and that is configured so that an auxiliary antenna can be placed next to the stand. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2000-214276 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the device described in Patent Document 1, even if the watch can be placed next to the auxiliary antenna, the distance between the antenna built into the watch and the auxiliary antenna is not necessarily short. Also, the position of the watch may become displaced due to vibration or impact. This makes it difficult to reliably improve the reception sensitivity of the watch's built-in antenna.

[0006] The present invention has been made in consideration of the above problems, and has an object to provide a device housing case that can reliably improve the receiving sensitivity of an antenna built into a device. [Means for solving the problem]

[0007] An apparatus housing case according to one aspect of the present invention comprises: a fixing part to which a wrist-worn device having a built-in main antenna is detachably attached; An auxiliary antenna disposed inside the fixed portion; Equipped with The arm-worn device has a band, the fixing part holds the arm worn device such that the main antenna is disposed in the vicinity of the auxiliary antenna with the band wrapped around an outer periphery of the fixing part. It is characterized by: Effect of the Invention

[0008] According to the present invention, it is possible to reliably improve the receiving sensitivity of an antenna built into a device. [Brief description of the drawings]

[0009] [Figure 1] 1 is a front view showing a schematic configuration of a main part of a device housing case according to a first embodiment. [Diagram 2] 2 is a cross-sectional view of the fixing part taken along line II-II in FIG. 1. [Diagram 3] 3 is an exploded perspective view of a main body of the fixing part shown in FIG. 2. [Figure 4] FIG. 1A is a front view of the device housing case according to the embodiment, showing a state in which the case lid is closed; FIG. 1B is a side view of the inside of the device housing case, as viewed from the direction of the arrow b in FIG. [Diagram 5]FIG. 11 is a schematic side view showing a fixing portion and a supporting portion according to the second embodiment. [Figure 6] FIG. 11 is a front view showing a schematic configuration of a main part of a device housing case according to a third embodiment. [Figure 7] FIG. 13 is a front view showing a schematic configuration of a main part of a device housing case according to a fourth embodiment. [Figure 8] 8 is a side view showing a schematic configuration of a main part of the device housing case shown in FIG. 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a device housing case according to the present invention will be described with reference to the drawings. In the following embodiments, the device housing case houses a wristwatch as a wrist-worn device. The wristwatch of this embodiment is a radio-controlled watch that has an antenna (referred to as a main antenna) that receives standard radio waves as described below, and corrects the current time data based on the received standard radio waves. In addition, the embodiments described below are subject to various limitations that are technically preferable for implementing the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0011] [First embodiment] [composition] FIG. 1 is a front view showing a schematic configuration of a main part of a device housing case according to a first embodiment. As shown in FIG. 1, a device housing case 100 according to this embodiment includes a fixed part 1 and a housing 5 that houses the fixed part 1. Fixed part 1 is adapted to detachably engage wristwatch 7 as a wrist-worn device, and is arranged within housing 5 while being supported by support part 6. There are no particular limitations on the specific shape or configuration of support part 6, but in the embodiment, a pair of plate-shaped support parts 6 onto which fixed part 1 can be hooked are arranged on both sides of fixed part 1 in the width direction.

[0012] The wristwatch 7 that is fastened to the fixed part 1 comprises a watch body 71 , a band 72 attached to the watch body 71 , a main antenna 73 built into the watch body 71 , and hands 74 . In the wristwatch 7 of this embodiment, the watch body 71 and the band 72 are both made of a metal material such as stainless steel (SUS) or titanium. The band 72 is assumed to be, for example, a metal bracelet type that is fixed by a clasp. The materials forming the wristwatch 7 are not limited to those exemplified here. Also, in FIG. 1, the watch body 71 is formed in a substantially circular shape, and an analog type watch that displays the time using hands 74 is shown as an example, but the shape of the watch body 71 is not limited to the illustrated example. Also, the wristwatch 7 may be one that is equipped with a liquid crystal display or the like and displays the time in a digital format.

[0013] Watch body 71 receives the standard radio wave by means of main antenna 73. Main antenna 73 is arranged, for example, on the back side inside watch body 71 (the side that is worn on the wrist, the back cover side not shown), which is the 12 o'clock side in an analog watch. The clock body 71 is equipped with a circuit section (not shown) that amplifies and modulates the standard radio wave received by the main antenna 73 to decode (generate) a standard time code, and corrects the current time data based on the generated standard time code. When the current time is corrected based on the standard time code, the current time updated to the corrected time is displayed by the hands 74.

[0014] The main antenna 73 is, for example, a bar antenna, and is configured with a rod-shaped antenna core made of a magnetic material with high relative permeability and low conductivity, such as amorphous or ferrite, and a coil made of a conductor such as copper wound around the antenna core (neither is shown). In this embodiment, the axis of the antenna core of the main antenna 73 is arranged at an angle with respect to the 12 o'clock-6 o'clock axis of an analog clock. Note that the position and orientation of the main antenna 73 shown in Fig. 1 are just an example.

[0015] Fixed part 1 is sized so that its outer circumference can be circumscribed by band 72, and wristwatch 7 is locked by wrapping band 72 around its surface. Fixed part 1 has a flat part and a curved part, and the back cover of wristwatch 7 as a wrist-worn device is arranged to correspond to the flat part. That is, when wristwatch 7 is locked, watch body 71 (the back side of watch body 71 (the side worn on the arm, back cover side)) is placed on mounting surface 17, which is the flat part of fixed part 1.

[0016] 2 is a cross-sectional view of the fixing portion taken along line II-II in FIG. 1, and FIG. 3 is an exploded perspective view of a main body of the fixing portion shown in FIG. As shown in FIG. 2, the fixing part 1 has an exterior member 3 and a covering member 4 provided on the outer periphery of a main body part 10. The main body 10 is a portion that becomes the core material of the fixing part 1, and is formed from various types of plastics such as PS (polystyrene), for example. The exterior member 3 is formed of a flexible resin material such as urethane resin (urethane foam). The covering member 4 is formed of synthetic leather, for example, and can produce a good-looking appearance. It is preferable that the covering member 4 is formed of a material that makes it difficult for things placed on the surface to slip, or that the covering member 4 is treated with an anti-slip coating or the like. This makes it difficult for the wristwatch 7 wrapped around the fixed part 1 to slip, and can more reliably prevent displacement. Note that the specific materials of the exterior member 3 and the covering member 4 are not limited to those exemplified here.

[0017] As shown in FIG. 3, the main body 10 includes a trunk portion 11 having flange portions 14 on both ends, and a cover portion 15 that covers the flange portions 14 from the side. The flat portion of the body 11 is the upper surface 11a. The upper surface 11a corresponds to the placement surface 17 of the fixed part 1. A part of the upper surface 11a of the body 11 is open, and the inside of the opening serves as a storage section 12. That is, the main body 10 has the storage section 12 formed therein. The auxiliary antenna 2 is detachably held within the housing portion 12. The main body portion 10 also includes a cover member 13 that closes the opening after the auxiliary antenna 2 is housed in the housing portion 12.

[0018] The auxiliary antenna 2, like the main antenna 73, is formed by winding a conductor such as copper around a rod-shaped core made of a magnetic material with high relative permeability and low conductivity, such as amorphous or ferrite. Auxiliary antenna 2 is set in housing 12 and is disposed within fixed part 1 on the side facing a back cover (the back side of the watch) (not shown) of wristwatch 7. In this embodiment, the auxiliary antenna 2 is disposed near the main antenna 73 by engaging the wristwatch 7 with the fixed part so that the watch body 71 of the wristwatch 7 is placed on the mounting surface 17 of the fixed part 1. This magnetically couples the main antenna 73 and the auxiliary antenna 2, improving the reception sensitivity (reception performance) of the main antenna 73 for the standard radio wave.

[0019] The auxiliary antenna 2 is disposed inside the fixed part 1 (the housing 12 of the fixed part 1) in an orientation that is approximately parallel to the axial direction of an antenna core (not shown) of the main antenna 73. In this embodiment, the axis of the antenna core of the main antenna 73 is disposed at an incline with respect to the 12 o'clock-6 o'clock axis. Therefore, the housing 12 and the core of the auxiliary antenna 2 disposed inside the housing 12 are disposed at the same inclination as the main antenna 73 so as to be approximately parallel to the axial direction of the antenna core of the main antenna 73.

[0020] The exterior member 3 is provided so as to wrap around the outer periphery of the main body 10. The exterior member 3 includes a first exterior member 3a arranged in a portion corresponding to the upper surface 11a, a second exterior member 3b arranged on a rounded side portion (curved portion), and a third exterior member 3c arranged on a bottom surface portion facing the upper surface 11a. The first exterior member 3a is the thinnest, and the second exterior member 3b and the third exterior member 3c are thicker than the first exterior member 3a. In the example shown in FIG. 2, the third exterior member 3c is the thickest, but the second exterior member 3b and the third exterior member 3c may be the same thickness.

[0021] By increasing the thickness of the second exterior member 3b and the third exterior member 3c, the exterior member 3 absorbs the difference in fastening force due to the difference in length of the band 72 of the wristwatch 7, and it becomes possible to wrap the band 72 around the fixed part 1 with a suitable fastening force regardless of whether the length of the band 72 is short or long. Furthermore, by making the first exterior member 3a arranged on the upper surface 11a corresponding to the mounting surface 17 of the fixed part 1, which is the location where the auxiliary antenna 2 and the main antenna 73 can be brought into close proximity, thinner than the second exterior member 3b and the third exterior member 3c arranged in locations where the auxiliary antenna 2 and the main antenna 73 are not brought into close proximity, the auxiliary antenna 2 and the main antenna 73 can be brought as close as possible, thereby achieving better magnetic coupling.

[0022] Fig. 4(a) is a front view of the device housing case according to the embodiment, showing the state in which the case lid is closed. Fig. 4(b) is a side view of the inside of the device housing case as seen from the direction of the arrow b in Fig. 4(a), showing the state in which the wall part on the right side in Fig. 4(a) has been removed. As shown in Fig. 4(a), housing 5 of device storage case 100 in this embodiment has an opening 50. Opening 50 is formed to a size that allows at least wristwatch 7 shown in Fig. 1 that is locked to fixed part 1 to be inserted and removed. As shown in Fig. 4(a) and Fig. 4(b), the housing 5 of this embodiment has a rear plate 52a, side plates 52b, and a front plate 52c facing the rear plate 52a attached to surround the periphery of a rectangular bottom plate 51. As shown in Fig. 4(a), the front plate 52c of the housing 5 can be removed upward. With the front plate 52c removed, the front side of the housing 5 is opened, forming an opening 50.

[0023] The back plate 52a, side plate 52b, and front plate 52c all have a watermark pattern or the like applied to the plate surface, so that a wristwatch 7 or the like placed inside can be seen through even when the opening 50 is blocked. By applying metal plating or the like to the plate surface with the watermark pattern, it is possible to give it an appearance with a luxurious feel. Even when the plate surface is metal plated, the watermark pattern is applied to the entire surface, and the thickness of the plating is extremely thin, so that the effect on reception of standard radio waves is kept to a minimum that does not cause any problems in actual use.

[0024] [Effect] Next, the operation of the housing device case 100 according to this embodiment will be described. At night or other times when the user is not wearing the wristwatch 100, the user removes the front panel 52c from the housing 5 of the device housing case 100 and removes the fixed part 1 from the opening 50. The fixed part 1 of this embodiment is simply hooked onto the support part 6, and can be easily removed and taken out of the housing 5 without using a tool or the like.

[0025] After removing the fixed part 1, the wristwatch 7 (see FIG. 1) to be stored in the device storage case 100 is locked to the fixed part 1. Specifically, the band 72 of the wristwatch 7 is wound around the outer circumference of the fixed part 1, and the watch body part 71 is placed on the mounting surface 17, which is the flat part of the fixed part 1. At this time, the position is adjusted so that the main antenna 73 of the wristwatch 7 is located close to the auxiliary antenna 2 in the fixed part 1, and the part containing the main antenna 73 is located near the position where the auxiliary antenna 2 is located. Then, by fastening the clasp (not shown) of the band 72, the second exterior member 3b and the third exterior member 3c are compressed slightly, and the watch body part 71 (the back cover side of the watch body part 71) and the mounting surface 17 of the fixed part 1 are in close contact with each other, and the wristwatch 7 with the band 72 is locked to the fixed part 1 with the main antenna 73 and the auxiliary antenna 2 not misaligned. As a result, the main antenna 73 and the auxiliary antenna 2 are magnetically coupled, and the reception sensitivity (reception performance) of the standard radio wave by the main antenna 73 of the wristwatch 7 can be improved.

[0026] The frequency bands of standard radio waves available for radio-controlled watches vary from region to region around the world. For example, currently, standard radio waves with frequencies of 40 kHz and 60 kHz are transmitted in Japan, 60 kHz in the United States, 77.5 kHz in Europe (Germany, etc.), and 68.5 kHz in China. For this reason, it is preferable that a plurality of auxiliary antennas 2 be prepared interchangeably, each with a different standard radio wave frequency band to which the auxiliary antenna 2 is tuned depending on the country or region in which the wristwatch 7 is used.

[0027] For example, a plurality of replaceable fixed parts 1 may be provided, and each fixed part 1 may incorporate an auxiliary antenna 2 that is tuned to a different frequency band of standard radio waves. In this case, the user selects from a plurality of fixed parts 1 a fixed part 1 having an auxiliary antenna 2 built in that corresponds to the frequency band of the standard radio waves of the country or region in which the user will be using the wristwatch 7, and attaches the wristwatch 7 to that fixed part 1.

[0028] Once the wristwatch 7 is secured to the fixed part 1, it is fitted onto the support part 6 inside the housing, and then the front panel 52c is attached to close the opening 50 in the housing 5. By simply leaving it in this state overnight, the standard radio signal will be received reliably by main antenna 73 which is magnetically coupled to auxiliary antenna 2, and the current time will be correctly adjusted based on the standard radio signal for each region.

[0029] [effect] As described above, according to this embodiment, the device storage case 100 comprises a fixed part 1 to which a wristwatch 7, which is a wrist-worn device incorporating a main antenna 73, is removably engaged, and an auxiliary antenna 2 arranged inside the fixed part 1, the wristwatch 7 has a band 72, and the fixed part 1 holds the wristwatch 7 so that the main antenna 73 is positioned near the auxiliary antenna 2 with the band 72 wrapped around the outer circumference of the fixed part. This allows the auxiliary antenna 2 to be located in close proximity to the main antenna 73, and by reliably magnetically coupling them, the reception sensitivity (reception performance) of the main antenna 73 is improved compared to the case where the main antenna 73 is used alone. Therefore, even in cases where the watch body 71 and band 72 are made of metal as in the embodiment shown, the main antenna 73 can easily receive the standard radio wave, and the time can be adjusted appropriately. Particularly in this embodiment, wristwatch 7 is fixed by wrapping band 72 around fixing part 1. Therefore, unlike the case where auxiliary antenna 2 is simply placed near main antenna 73, main antenna 73 will not separate from auxiliary antenna 2 even if there is vibration or impact, and main antenna 73 and auxiliary antenna 2 can be reliably magnetically coupled.

[0030] Furthermore, in this embodiment, main antenna 73 is disposed on the back cover side of wristwatch 7, and auxiliary antenna 2 is disposed within fixed part 1 on the side opposite the back cover of wristwatch 7. Therefore, by simply placing the watch body 71 on the mounting surface 17 of the fixed part 1 and fastening the band 72, the main antenna 73 and the auxiliary antenna 2 can be brought close to each other, and can be reliably positioned in a positional relationship that facilitates magnetic coupling.

[0031] Furthermore, the fixed portion 1 of this embodiment has a support surface 17 as a flat portion and a curved portion, and the back cover of the wristwatch 7 as a wrist-worn device (the back side of the watch main body portion 71 (the side that is worn on the wrist, the back cover side)) is arranged to correspond to the support surface 17 as a flat portion. This allows wristwatch 7 equipped with main antenna 73 to be stably positioned, and band 72 to be naturally wrapped around the curved portion, maintaining main antenna 73 and auxiliary antenna 2 in close proximity to each other. This ensures that main antenna 73 and auxiliary antenna 2 are magnetically coupled.

[0032] Moreover, the fixing portion 1 of this embodiment is formed to a size that allows the band 72 to wrap around its outer periphery. This allows the wristwatch 7 to be securely held in place by the band, preventing it from shifting position due to vibration or impact.

[0033] Furthermore, in this embodiment, an exterior member 3 made of a resin material is provided on the outer circumferential portion of the fixed part 1 where the wristwatch 7 is held, and this exterior member 3 is thinner in the area where the auxiliary antenna 2 and the main antenna 73 can be brought into close proximity, i.e., around the mounting surface 17 (in Figure 2, the first exterior member 3a), than in the areas where they are not close (in Figure 2, the second exterior member 3b and the third exterior member 3c). Therefore, the auxiliary antenna 2 and the main antenna 73 can be disposed in close proximity to each other even with the exterior member 3 interposed therebetween, and effective magnetic coupling can be achieved.

[0034] In this embodiment, the main antenna 73 has a rod-shaped antenna core, and the auxiliary antenna 2 is disposed inside the fixed part 1 in a direction substantially parallel to the axial direction of the antenna core of the main antenna 73. This makes it easier for the main antenna 73 and the auxiliary antenna 2 to be magnetically coupled together, compared to when the main antenna 73 and the auxiliary antenna 2 are oriented in different directions, which is advantageous in terms of improving reception sensitivity (reception performance).

[0035] Also, for example, a plurality of interchangeable fixed parts 1 each incorporating auxiliary antennas 2 tuned to different frequency bands of standard radio waves can be prepared, and a fixed part 1 incorporating an auxiliary antenna 2 corresponding to the frequency band required for the main antenna 73, i.e., the frequency band of the standard radio waves in the area in which the wristwatch 7 is used, can be selected, and the wristwatch 7 can be attached to this, so that the auxiliary antenna 2 corresponding to the frequency band of the standard radio waves in the area in which it is used can be positioned in the vicinity of the main antenna 73. In this case, no matter where the wristwatch 7 is used, time adjustment based on the standard radio wave can be performed reliably and the correct time can be displayed.

[0036] Second Embodiment 5 is a schematic side view showing the fixed part and the support part arranged in the device housing case according to the second embodiment. The housing 5 is the same as that shown in the first embodiment, so illustration and description are omitted. The wristwatch 7 as a wrist-worn device supported by the fixed part 1a is also the same as that in the first embodiment. As shown in Figure 5, the fixed portion 1a in this embodiment is approximately triangular in side view, and has three support surfaces, namely a first support surface 17a, a second support surface 17b, and a third support surface 17c, on which the watch main body portion 71 of the wristwatch 7 shown in Figure 1 can be placed.

[0037] The support portion 6a in this embodiment has a substantially V-shaped notch 65 that matches the outer circumferential shape of the fixed portion 1a so that either one of the mounting surfaces can be disposed obliquely upward. In FIG. 5, the support portion 6a holds the fixed portion 1a with the first placement surface 17a facing upward. A first auxiliary antenna 2a is provided at a position that corresponds to the upper end side when the fixed portion 1a is held with the first placement surface 17a facing upward.

[0038] Similarly, the second auxiliary antenna 2b is provided at a position that corresponds to the upper end side when the fixed part 1a is held with the second mounting surface 17b facing upward. The third auxiliary antenna 2c is provided at a position that corresponds to the upper end side when the fixed part 1a is held with the third mounting surface 17c facing upward. The first auxiliary antenna 2a, the second auxiliary antenna 2b, and the third auxiliary antenna 2c are auxiliary antennas that are tuned to standard radio waves of different frequency bands. For example, the first auxiliary antenna 2a is tuned to a standard radio wave of a 40 kHz frequency band, the second auxiliary antenna 2b is tuned to a standard radio wave of a 60 kHz frequency band, and the third auxiliary antenna 2c is tuned to a standard radio wave of a 77.5 kHz frequency band.

[0039] As a result, when the fixed part 1a is held in a direction such that the first mounting surface 17a faces upward (as shown in FIG. 5), when the watch body part 71 of the wristwatch 7 is placed on the first mounting surface 17a, the first auxiliary antenna 2a is placed near the main antenna 73, and the reception sensitivity (reception performance) is best improved when the frequency band of the standard radio wave is 40 kHz. Also, when the frequency band of the standard radio wave is 60 kHz, the fixed part 1a is held in a direction such that the second mounting surface 17b faces upward. As a result, when the watch body part 71 of the wristwatch 7 is placed on the second mounting surface 17b, the second auxiliary antenna 2b is placed near the main antenna 73, and the reception sensitivity (reception performance) is best improved when the frequency band of the standard radio wave is 60 kHz. Furthermore, when the frequency band of the standard radio wave in the area where the wristwatch 7 is used is 77.5 kHz, the fixed part 1a is held in a direction such that the third mounting surface 17c faces upward. As a result, the watch body 71 of the wristwatch 7 is placed on the third placement surface 17c, and the third auxiliary antenna 2c is disposed in the vicinity of the main antenna 73. Therefore, when the frequency band of the standard radio wave is 77.5 kHz, the reception sensitivity (reception performance) can be improved most effectively.

[0040] In this manner, in this embodiment, simply by changing the orientation of the fixed portion 1a held by the support portion 6a, it is possible to improve the receiving sensitivity (receiving performance) of the main antenna 73 to accommodate standard radio waves in three different frequency bands. For this reason, there is no need to have multiple fixed units 1a, and the user can support multiple frequency bands simply by switching fixed units 1a depending on the standard radio waves of the area in which the wristwatch 7 is used. Note that the illustrated example is merely illustrative, and the shape, configuration, etc. can be changed as appropriate. For example, if the fixed part is rectangular in side view and has four mounting surfaces, it is possible to arrange four auxiliary antennas 2 corresponding to each mounting surface. In this case, if the frequency bands of standard radio waves to which each auxiliary antenna 2 is tuned are different from each other, it is possible to make it possible for one fixed part to handle standard radio waves of four different frequency bands.

[0041] Third embodiment FIG. 6 is a front view showing a schematic configuration of the main part of the device housing case according to the third embodiment. Note that FIG. 6 is merely a schematic diagram and does not accurately represent the configuration and shape. The wristwatch 7 as the wrist-worn device supported by the fixed part 1b is the same as that of the first embodiment, and therefore will not be described. Note that FIG. 6 shows an example in which the main antenna 73 is disposed approximately parallel to the 3 o'clock-9 o'clock direction of an analog watch. Also, the housing 5a is the same as that shown in the first embodiment, except that it is formed long in the width direction according to the shape of the fixed part 1b. As shown in Fig. 6, in device housing case 200 according to this embodiment, fixed part 1b housed within housing 5a has a length dimension sufficient to accommodate two wristwatches 7 as wrist-worn devices placed side by side. It is not envisaged that two wristwatches 7 will be placed on fixed part 1b at the same time, and a wristwatch 7 is placed on either the left or right side in the drawing. In Fig. 6, the case where a wristwatch 7 is placed on the left side and a wristwatch 7 is placed on the right side is shown by imaginary lines.

[0042] As shown in the figure, in this embodiment, two auxiliary antennas 2 are arranged inside the fixed portion 1b. These two auxiliary antennas 2 are adapted to tune to different frequency bands of standard radio waves. That is, for example, the fourth auxiliary antenna 2d arranged on the left side of the fixed unit 1b is tuned to a standard radio wave with a frequency band of 40 kHz, and the fifth auxiliary antenna 2e arranged on the right side of the fixed unit 1b is tuned to a standard radio wave with a frequency band of 60 kHz. In the illustrated example, as described above, the main antenna 73 is arranged approximately parallel to the 3 o'clock-9 o'clock direction of an analog clock, so that each auxiliary antenna 2 is also arranged approximately parallel to the axis of the antenna core of the main antenna.

[0043] In this case, when the wristwatch 7 is used in an area where the standard radio wave frequency band is 40 kHz, the wristwatch 7 is wrapped around and fixed on the left side of the mounting surface 17d of the fixed part 1b. At this time, the fixed position is adjusted so that the main antenna 73 built into the wristwatch is positioned near the fourth auxiliary antenna 2d built into the left side of the fixed part 1b. In this way, the fourth auxiliary antenna 2d is magnetically coupled to the main antenna 73, thereby making it possible to improve reception performance to the maximum when the standard radio wave frequency band is 40 kHz. Furthermore, when the wristwatch 7 is used in an area where the standard radio wave frequency band is 60 kHz, the wristwatch 7 is wrapped around and fixed to the right side of the mounting surface 17d of the fixed part 1b. At this time, the fixed position is adjusted so that the main antenna 73 built into the wristwatch is positioned near the fifth auxiliary antenna 2e built into the right side of the fixed part 1b. In this way, the fifth auxiliary antenna 2e is magnetically coupled to the main antenna 73, thereby making it possible to improve reception performance to the maximum extent when the standard radio wave frequency band is 60 kHz.

[0044] [Fourth embodiment] FIG. 7 is a front view showing a schematic configuration of the main part of the device housing case according to the fourth embodiment, and FIG. 8 is a side view showing a schematic configuration of the main part of the device housing case shown in FIG. 7. Note that FIG. 7 and FIG. 8 are merely schematic views and do not accurately represent the configuration and shape. The wristwatch 7 as a wrist-worn device supported by the fixed part 1c is the same as that of the first embodiment, and therefore will not be described. Note that FIG. 7 illustrates a case in which the main antenna 73 is disposed approximately parallel to the 3 o'clock-9 o'clock direction of an analog watch. Also, the housing 5b is the same as that shown in the first embodiment.

[0045] As shown in FIGS. 7 and 8, in device housing case 300 according to this embodiment, fixing portion 1c is a substantially cylindrical member formed in a circular shape when viewed from the side. The support part 6c supporting the fixed part 1c supports the fixed part 1c in a cantilever manner from either the left or right side of the fixed part 1c (the left side in Figure 8), and is an approximately L-shaped member having a support pillar 61 standing upright from the bottom plate 51 of the housing 5b and an axis member 62 provided on the free end side of the support pillar 61. The shaft member 62 is fixed to the center of a side surface of the substantially circular fixed portion 1c, and the fixed portion 1c is rotatable about the shaft center of the shaft member 62.

[0046] As shown in FIG. 8, three auxiliary antennas 2 are arranged at approximately equal intervals within the fixed portion 1c so as to surround the axial center of the shaft member 62. The three auxiliary antennas 2 (i.e., the sixth auxiliary antenna 2f, the seventh auxiliary antenna 2g, and the eighth auxiliary antenna 2h) are auxiliary antennas 2 that are tuned to standard radio waves of different frequency bands. For example, the sixth auxiliary antenna 2f is tuned to standard radio waves of a 40 kHz frequency band, the seventh auxiliary antenna 2g is tuned to standard radio waves of a 60 kHz frequency band, and the eighth auxiliary antenna 2h is tuned to standard radio waves of a 77.5 kHz frequency band.

[0047] As a result, when the wristwatch 7 is placed on the mounting surface 17e of the fixed part 1c, the auxiliary antenna 2 that is magnetically coupled to the main antenna 73 will change depending on which auxiliary antenna 2 is placed in a position corresponding to the main antenna 73 built into the wristwatch 7, and the frequency band in which the reception sensitivity (reception performance) is improved will change. For example, in the example shown in Figures 7 and 8, the sixth auxiliary antenna 2f is closest to the main antenna 73, and can best improve the receiving sensitivity (receiving performance) when the frequency band of the standard radio wave is 40 kHz.

[0048] When the user wishes to use the wristwatch 7 in an area where the standard radio wave frequency band is 60 kHz, the user rotates the fixed part 1c in the direction shown by the arrow in Fig. 8 (counterclockwise in the illustrated example) to adjust the position so that the seventh auxiliary antenna 2g is closest to the main antenna 73. This makes it possible to improve the reception sensitivity (reception performance) to the greatest extent when the standard radio wave frequency band is 60 kHz. Similarly, when the user wishes to use wristwatch 7 in an area where the standard radio wave frequency band is 77.5 kHz, the user rotates fixed part 1c in the direction shown by the arrow in Fig. 8 (counterclockwise in the illustrated example) to adjust the position so that eighth auxiliary antenna 2h is closest to main antenna 73. This makes it possible to improve reception sensitivity (reception performance) to the greatest extent when the standard radio wave frequency band is 77.5 kHz. The method for rotating the fixed portion 1c is not particularly limited, and the user may rotate it manually, or, for example, a motor mechanism may be provided on the shaft member 62, etc., and the fixed portion 1c may be automatically rotated to the optimal position by the motor.

[0049] [Variations] Although the embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to such an embodiment, and various modifications are possible without departing from the gist of the present invention.

[0050] For example, in each of the above embodiments, it is assumed that the auxiliary antenna 2 is pre-installed in the fixed portion at the time of shipment, etc., but the attachment and detachment of the auxiliary antenna 2 is not limited to being performed at the time of shipment, etc. For example, cuts or the like may be provided in exterior member 3 and covering member 4 at the portions corresponding to housing portion 12 and cover member 13 of the fixing portion shown in FIG. 3, so that the entire assembly can be removed. Also, for example, the structure may be such that only the main body portion 10, which is the core material, is slid to remove the exterior member 3 and the covering member 4, and the lid member 13 can be removed. In such a case, for example, multiple types of auxiliary antennas 2 with different tuned frequency bands may be prepared, and depending on the area in which the user uses the wristwatch 7, the auxiliary antenna placed in the fixed part may be replaced with an auxiliary antenna 2 with a corresponding frequency band as appropriate.

[0051] Furthermore, for example, the third embodiment has been exemplified as a case in which the auxiliary antenna 2, which is magnetically coupled to the main antenna 73, is switched by changing the position at which the wristwatch 7 is fixed. However, if the position of the auxiliary antenna 2 is slid or moved using a motor or the like, it is also possible to switch the auxiliary antenna 2, which is magnetically coupled to the main antenna 73, without changing the position at which the wristwatch 7 is attached.

[0052] Also, for example, a mark indicating the position of the auxiliary antenna may be provided on the surface of fixed part 1 to show the user who wears wristwatch 7 a guide of the attachment position. Furthermore, when multiple auxiliary antennas 2 are provided within one fixed part, as in the second and third embodiments, the color or pattern of the mounting surface 17 may be partially changed, or indicator letters, symbols, etc. may be added, to clearly show the user which frequency band of standard radio waves should be positioned in order to improve the reception sensitivity (reception performance) for the standard radio waves.

[0053] In addition, in each of the above embodiments, it is assumed that band 72 of wristwatch 7 as a wrist-worn device is made of a metal material and is a bracelet type fastened with a clasp, but the band is not limited to this. For example, a leather band or a resin band may be used, and in these cases, when attaching wristwatch 7 to a fixing part supported by a support part such as that shown in Figure 1, the work can be performed without removing the fixing part from the support part.

[0054] In addition, in each of the above embodiments, the wrist-worn device housed in the device housing case is a wristwatch 7, but the wrist-worn device housed in the device housing case of the present invention is not limited to a wristwatch. The present invention can be widely applied to any device in which a band 72 is attached to the device body (watch body 71 in the embodiment), and can be widely applied to electronic devices such as various smart watches and sports watches, and wrist-worn devices such as wearable devices that acquire biometric information such as heart rate and blood flow information in addition to the time.

[0055] Although several embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and its equivalents. [Explanation of symbols]

[0056] 1 Fixed part 10 Main body 17 Placement surface (flat surface) 2 Auxiliary Antenna 3 Exterior materials 4 Covering materials 5. Cabinet 6 Support part 7 Watches (wrist-worn devices) 71 Clock body 72 bands 73 Main Antenna 100 Equipment storage case

Claims

1. a fixing part to which a wrist-worn device having a built-in main antenna is detachably attached; An auxiliary antenna disposed inside the fixed portion; Equipped with The arm-worn device has a band, the fixing part holds the arm worn device such that the main antenna is disposed in the vicinity of the auxiliary antenna with the band wrapped around an outer periphery of the fixing part. An apparatus housing case comprising:

2. the main antenna is disposed on the back cover side of the wrist-worn device, the auxiliary antenna is disposed within the fixed portion on a side opposite to a back cover of the wrist-worn device; 2. The device housing case according to claim 1.

3. The fixing portion has a flat surface portion and a curved surface portion, A back cover of the wrist-worn device is disposed on the flat surface.

2. The device housing case according to claim 1.

4. The fixing portion is sized so that the outer periphery can be circumferentially wrapped by the band.

2. The device housing case according to claim 1.

5. a resin material is provided on an outer circumferential portion of the fixing portion where the arm wearing device is held, The resin material is thinner in a portion where the auxiliary antenna and the main antenna can be brought into close proximity than in a portion where they are not close to each other.

2. The device housing case according to claim 1.

6. The main antenna has a rod-shaped antenna core, The auxiliary antenna is disposed inside the fixed portion in a direction substantially parallel to an axial direction of the antenna core of the main antenna.

2. The device housing case according to claim 1.

7. As the auxiliary antenna, a plurality of auxiliary antennas each having a different frequency band of standard radio waves to be tuned to are prepared in an exchangeable manner, The auxiliary antenna corresponding to a frequency band required for the main antenna is configured to be disposed in the vicinity of the main antenna.

2. The device housing case according to claim 1.

8. the fixing portion has a housing portion that detachably holds the auxiliary antenna, The auxiliary antenna corresponding to a frequency band required for the main antenna is held in the housing.

2. The device housing case according to claim 1.

9. Further comprising a housing for accommodating the fixing portion, the housing has an opening through which the arm-worn device, which is engaged with the fixing portion, can be inserted and removed; 2. The device housing case according to claim 1.

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