JP2005251575A - Proximity switch mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stable proximity switch mechanism free from erroneous operation of which, the range of characteristics of a usable magnetic sensitive switch is expanded by reducing the leakage of magnetic flux even if a magnetic body exists in the proximity to a magnet. <P>SOLUTION: The proximity switch mechanism is constructed of a reed switch 23 consisting of a thin and long glass tube (insulating container) 13 and a pair of reed pieces 15, and magnets 69a and 69b. The reed switch 23 is mounted on a printed-circuit board (mounting substrate) 21, and an external terminal 17 is connected by soldering to a conductor pattern formed on the printed-circuit board 21 and connected to a circuit which detects opening and closing state of a contact. The magnets 69a and 69b for driving the reed switch are arranged in close contact, for example, in the vicinity of a magnetic body 27 such as a frame of a liquid crystal panel, and the opposed face with the reed switch 23 is formed into a single face with two electrodes. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a proximity switch mechanism using a magnetically sensitive switch and a magnet, and in particular, a proximity switch suitable for use in detecting opening / closing or separate integration of two housing parts such as a mobile terminal device, a personal computer, or a mobile phone. Regarding the mechanism.

  Conventionally, a reed switch which is a magnetically sensitive switch is used in combination with a driving magnet. This reed switch and drive magnet are installed according to the state of the mounting location and purpose of use, etc. When there is a magnetic body (such as a frame of a liquid crystal panel) close to the drive magnet for the reed switch (contact point) Since the driving distance becomes extremely short or stops driving, it is necessary to increase the magnetic force of the driving magnet or use a reed switch with a good impression (impressed with a weaker magnetic force). There is. However, in order to increase the magnetic force of the driving magnet, it is necessary to enlarge the magnet or provide a yoke. However, the surface area and mass of the magnet increase, and the mounting position is limited. In addition, if a magnet made of a material having a strong magnetic force (such as rare earth) is used, peripheral devices are damaged by the magnetic flux leaked from the magnet and the human body is affected, and the cost of the magnet increases.

  Moreover, since the lower limit of the moving value of a commonly used reed switch (those that have a good impression) is about 13 ampere turns, the reed switch has a driving distance (the reed switch at the moment when the reed switch contact is switched on and off) There is a limit to increasing the distance) to the drive magnet.

  First, a first example of a conventional proximity switch mechanism will be outlined with reference to FIG. 9A is a perspective view thereof, FIG. 9B is a cross-sectional view taken along line GG shown in FIG. 9A, and FIG. 9C is a partial view including FIG. 9A. It is a notch side view. The proximity switch mechanism 11 shown in the figure includes an elongated glass tube (insulating container) 13, and a pair of lead pieces 15 are enclosed in the glass tube (insulating container) 13 along the longitudinal direction. The lead pieces 15 are arranged at positions where their one ends (contact points) 15a are in contact with each other, and the one ends (contact points) 15a are in contact / non-contact with each other depending on the presence or absence of an external magnetic field (not shown). It is said. Reference numeral 15b denotes an enclosed portion.

  The other end of the lead piece 15 extends outside the glass tube 13 and is used as an external terminal 17. The external terminal 17 is a part of the rolled external terminal 19 and is connected to a conductor pattern formed on a circuit board, that is, a printed board (mounting board) 21 by soldering or the like at a connection point 21a.

  The reed switch driving magnet 25 is magnetized with one N pole in the longitudinal direction and the other with a S pole, and is installed at a position facing the reed switch 23 in parallel with the reed switch longitudinal direction. 27 is in a close position.

  In the partially cutaway side view of the proximity switch mechanism 11 of the foldable electronic device shown in FIG. 9C, the printed circuit board 21 is placed at the end of the lower casing 35 that is connected to be opened and closed through a hinge 37. The reed switch 23 is provided, and the magnet 25 is provided at a position facing the reed switch 23 at the end of the upper casing 33.

  In the proximity switch mechanism 11, the magnetic flux 31 from the magnet 25 end face N pole flows into the magnet 25 end face S pole. However, a large amount of magnetic flux 31 leaks to the adjacent magnetic body 27 side, so that the magnetic flux 31 hardly flows through the reed switch 23 facing the magnetic flux 27. For this reason, it is difficult to turn on the reed switch 23. (Hereinafter, the proximity switch mechanism shown in FIG. 9 is referred to as Conventional Example 1).

  With reference to FIG. 10, a second example of a conventional proximity switch mechanism will be outlined. 10A is a perspective view thereof, and FIG. 10B is a cross-sectional view taken along the line HH shown in FIG. 10A. In the proximity switch mechanism 47 shown in the figure, the same reference numerals (symbols) are assigned to the same components as those of the proximity switch mechanism 11 shown in FIG. The reed switch 45 is a case-type reed switch in which a glass tube (insulating container) 13 is accommodated in a case 41 and a filling / adhesive 43 is filled between the glass tube 13 and the case 41.

  The external terminal 17 of this reed switch is connected to a conductor pattern formed on a circuit board, that is, a printed board (mounting board) 21, by soldering or the like at a connection point 21b.

  The reed switch driving magnet 25 is magnetized with one N pole in the longitudinal direction and the other with an S pole. The reed switch driving magnet 25 is installed in a position facing the reed switch 45 in parallel with the reed switch longitudinal direction, and the magnetic body 27 is in proximity. Further, a nonmagnetic spacer plate 49 is installed between the driving magnet 25 and the magnetic body 27. (Hereinafter, the proximity switch mechanism shown in FIG. 10 is referred to as Conventional Example 2).

  With reference to FIG. 11, a third example of a conventional proximity switch mechanism will be outlined. FIG. 11A is a perspective view, and FIG. 11B is a cross-sectional view taken along line I-I shown in FIG. In the illustrated proximity switch mechanism 55, the same components as those of the proximity switch mechanism shown in FIG. The reed switch 45 is a case-type reed switch in which a glass tube (insulating container) 13 is accommodated in a case 41 and a filling / adhesive 43 is filled between the glass tube 13 and the case 41.

  The external terminal 17 of the reed switch is connected to a conductor pattern formed on a circuit board, that is, a printed circuit board (mounting board) 21 at a connection portion 17a by soldering or the like at a connection point 21b. Auxiliary magnet 57 is disposed on the side.

  Further, the reed switch driving magnet 25 is magnetized with one N pole in the longitudinal direction and the other with the S pole, and is installed at a position facing the reed switch 45 in parallel with the reed switch longitudinal direction. 27 is close. (Hereinafter, the proximity switch mechanism shown in FIG. 11 is referred to as Conventional Example 3).

  Furthermore, in Patent Document 1, as shown in FIG. 12, magnets 61a and 61b magnetized with two surface poles so as to have NS poles are opposed to two opposite surfaces, and in the vicinity of one magnet 61b. Discloses a magnetic circuit for adsorption with a reed switch 23 attached thereto. Here, FIG. 12 (a) is an explanatory view showing the case where the main body of the foldable mobile phone is closed, and FIG. 12 (b) is an explanatory view showing the case where the main body is opened, and FIG. FIG. 4 is a diagram showing in detail a magnetic flux distribution when the main body is opened.

  When the main body 65 of the foldable mobile phone is closed as shown in FIG. 12A, the opposing magnets 61a and 61b are attracted, and the magnetic flux 31 generated from the opposing back surface of the opposing magnet flows to the reed switch 23. The switch 23 is driven. When the main body 65 of the folding cellular phone is opened, the magnetic flux 31 of the magnets 61a and 61b does not leak to the reed switch 23 as shown in FIGS. 12 (b) and 12 (c), thereby preventing malfunction. It is a magnetic circuit. (Hereinafter, the magnetic circuit for adsorption shown in FIG. 12 is referred to as Conventional Example 4).

Japanese Patent Laid-Open No. 8-316024

  By the way, in the above-mentioned conventional example 1, the leakage magnetic flux of the driving magnet increases in the adjacent magnetic material, so that it is necessary to select and use a magnetic sensitive switch having characteristics that move with a small amount of magnetic flux. There is a problem that the operation becomes unstable.

  Conventional Example 2 that solves Conventional Example 1 uses a non-magnetic spacer plate for providing a distance between the driving magnet and the magnetic body in order to reduce the leakage of magnetic flux from the driving magnet to the adjacent magnetic body. As a result, there are problems in that the assembly manufacturing cost and the parts cost are high, and the installation positional relationship between the reed switch and the drive magnet in the assembly package is limited, so that the degree of freedom of installation in the assembly package is reduced. .

  In Conventional Example 3, which solves Conventional Example 1, in order to improve the sensitivity of the reed switch, an auxiliary magnet must be used, which increases assembly and manufacturing costs and component costs. The installation positional relationship of the drive magnet is limited, and the degree of freedom of attachment in the assembly package is reduced. Furthermore, since the sensitivity of the reed switch is increased by the auxiliary magnet, there is a problem that instantaneous contact (ON) and instantaneous disconnection (OFF) are caused by an impact.

  In the example shown in Patent Document 1 (conventional example 4), two magnets must be used facing each other, which increases assembly and manufacturing costs and component costs. In addition, a reed switch and a drive magnet in the assembly package The installation positional relationship is limited, and the degree of freedom of installation in the assembly package is reduced.

  In this situation, the problem of the present invention is that even if there is a magnetic body close to the magnet, the leakage magnetic flux to the magnetic body is reduced and the effective magnetic flux to the magnetically sensitive switch is sufficiently secured and can be used. An object of the present invention is to provide a stable proximity switch mechanism that does not malfunction by increasing the range of characteristics of a magnetically sensitive switch.

  According to the first aspect of the present invention, proximity or separation of two independent mechanisms as components of an electronic application device including a magnetic material is detected by proximity or separation of the two magnets and the magnetically sensitive switch. In the proximity switch mechanism, the two magnets are disposed on one of the two independent mechanism portions, the magnetic sensitive switch is disposed on the other of the two independent mechanism portions, and faces the two magnets. A proximity switch mechanism is obtained in which the opposing surfaces of the two magnets to the magnetically sensitive switch have different polarities.

  According to a second aspect of the present invention, the proximity switch according to the first aspect is characterized in that a yoke or a soft magnetic plate is disposed on the opposite side of the surface facing the magnetically sensitive switch in the two magnets. A mechanism is obtained.

  According to the invention described in claim 3, a part of the magnetic body is disposed in contact with the opposite side of the surface of the two magnets facing the magnetically sensitive switch, and the magnetic body is composed of two magnets. The proximity switch mechanism according to claim 1, wherein a magnetic path that guides the magnetic flux emitted from one side to the other magnet is obtained.

  According to the fourth aspect of the present invention, proximity that detects the proximity or separation of two independent mechanisms as components of an electronic application device that includes a magnetic body by proximity or separation between the magnet and the magnetically sensitive switch. In the switch mechanism, the magnet is disposed in one of the two independent mechanism portions, and the magnetically sensitive switch is disposed in the other of the two independent mechanism portions and is opposed to the magnet, and the magnetic sensitive switch in the magnet. A proximity switch mechanism is obtained in which a notch is provided in the center of the surface facing the switch, and magnetic poles having different polarities are formed with the notch as a boundary.

  According to the fifth aspect of the present invention, the proximity that detects the proximity or separation of the two independent mechanism portions as components of the electronic application device including the magnetic material by the proximity or separation of the magnet and the magnetically sensitive switch. In the switch mechanism, the magnet is disposed on one of the two independent mechanism portions, the magnetically sensitive switch is disposed on the other of the two independent mechanism portions and faces the magnet, and the magnet is a horseshoe-shaped magnet. Thus, a proximity switch mechanism is obtained in which two magnetic pole ends are arranged on the surface facing the magnetically sensitive switch.

  According to the sixth aspect of the present invention, the first space region includes the first and second space regions separated from each other by a single plane including a surface facing the magnetically sensitive switch in the magnet. 6. The magnetic sensing switch according to claim 1, wherein the magnet and the magnetic body are positioned and the magnetic body is not in contact with the plane, and a magnetically sensitive switch is positioned in the second space region. The proximity switch mechanism described in one is obtained.

  According to a seventh aspect of the present invention, there is provided the proximity switch mechanism according to any one of the first to sixth aspects, wherein the magnetically sensitive switch includes a reed switch.

  According to an eighth aspect of the present invention, there is provided the proximity switch mechanism according to the seventh aspect, wherein the magnetically sensitive switch includes a case for storing a reed switch and / or a harness for pulling out a terminal. .

  According to a ninth aspect of the present invention, there is provided the proximity switch mechanism according to any one of the first to sixth aspects, wherein the magnetically sensitive switch comprises a Hall IC and a switching circuit. .

  According to a tenth aspect of the present invention, there is provided the proximity switch mechanism according to any one of the first to sixth aspects, wherein the magnetically sensitive switch comprises an MR element and a switching circuit. .

  According to an eleventh aspect of the present invention, the electronic application device is a foldable electronic device that opens and closes via a hinge, and the two independent mechanism portions rotate around the hinge to approach or separate from each other. The proximity switch mechanism according to any one of claims 1 to 10 is obtained.

  According to a twelfth aspect of the present invention, the electronic application device is a slide type electronic device in which two independent mechanism portions move in parallel with each other. The proximity switch mechanism described in one is obtained.

  According to a thirteenth aspect of the present invention, the electronic application device is a separate type electronic device in which the two independent mechanism portions move perpendicularly to a surface facing each other. The proximity switch mechanism described in any one of 10 is obtained.

  As described above, in the present invention, since the driving magnet installed opposite to the magnetically sensitive switch is arranged as two poles on one side, even if there is a magnetic body close to the magnet, the leakage magnetic flux to this magnetic body is reduced. Because the effective magnetic flux to the magnetic sensitive switch can be sufficiently reduced, the range of the characteristics of the magnetic sensitive switch that can be used is widened, and not only a stable proximity switch mechanism without malfunctioning can be obtained, but also the mounting structure can be simplified. There is an effect that it is possible to provide a proximity switch mechanism that is low in assembly cost and parts cost due to a reduction in the number of parts.

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

  FIG. 1 shows an embodiment according to claim 1 of the present invention, and shows a proximity switch mechanism in which a magnetically sensitive switch is implemented by a reed switch according to claim 7, wherein FIG. 1 (a) is a perspective view and FIG. 1 (b). FIG. 1A is a cross-sectional view taken along line AA shown in FIG. 1A, and FIG. 1C is a partially cutaway side view showing the whole including FIG.

  With reference to FIG. 1, the proximity switch mechanism 67 of the present embodiment includes a reed switch 23 including a glass tube (insulating container) 13 and a pair of lead pieces 15, and two magnets 69a and 69b. The reed switch 23 is mounted on a printed circuit board (mounting board) 21, and the external terminals 17 are solder-connected to a conductor pattern formed on the printed circuit board 21 at connection points 21a to detect a contact open / close state (FIG. (Not shown).

  On the other hand, the two reed switch driving magnets 69a and 69b are disposed in the vicinity of the magnetic body 27 such as the frame of the liquid crystal panel 29 or in close contact with each other, and the surface facing the reed switch 23 has a different polarity. And it has two poles on one side.

  Accordingly, in the proximity switch mechanism 67 of the present embodiment, a part of the magnetic flux 31 generated from the magnets 69a and 69b leaks to the magnetic body 27 as a leakage magnetic flux, but it is possible to ensure the magnetic flux necessary for the operation of the reed switch 23. I can do it.

  In the partially cutaway side view of the proximity switch mechanism 67 of the foldable electronic device shown in FIG. 1C, it is formed on the printed circuit board 21 at the end of the lower housing 35 that is openably and closably connected via the hinge portion 37. The reed switch 23 is provided, and magnets 69 a and 69 b provided at positions facing the reed switch 23 at the end of the upper casing 33.

  When the casing of the foldable electronic device is closed, the reed switch 23 and the magnets 69a and 69b are close to each other. Therefore, the reed switch 23 is in an operating state, and when the casing is opened, Since the magnets 69a and 69b are separated from each other, the reed switch 23 becomes inoperative and generates a signal indicating that the opening / closing operation of the casing of the folding electronic device has been performed.

  2 shows an embodiment according to claim 2 of the present invention, and shows a proximity switch mechanism 71 in which yokes are arranged on two magnets, FIG. 2 (a) is a perspective view, and FIG. 2 (b) is FIG. It is sectional drawing in the BB line shown to a).

  Referring to FIG. 2, the present embodiment has substantially the same configuration as that of the embodiment of claim 1. Therefore, the same configuration as that of the embodiment of claim 1 is the same as that of the embodiment of claim 1. The same reference numerals are assigned, the description thereof is omitted, and only different parts of the configuration will be described.

  A magnetic material yoke 73 is disposed on the opposite side of the two reed switch driving magnets 69a and 69b facing the magnetically sensitive switch, and has two poles on one side.

  Therefore, in the proximity switch mechanism according to the present embodiment, part of the magnetic flux 31 generated from the magnets 69a and 69b leaks to the magnetic body 27 as a leakage magnetic flux by preventing the magnetic flux from being dispersed by the yoke 73, but most of the lead is a lead. A sufficient magnetic flux required for the operation of the switch 23 can be secured.

  FIG. 3 shows an embodiment according to claim 3 of the present invention, and shows a proximity switch mechanism in which two magnets are arranged on a magnetic body frame of an electronic device. FIG. 3 (a) is a perspective view and FIG. 3 (b). FIG. 3A is a cross-sectional view taken along line CC shown in FIG. 3A, and FIG. 3C is a partially cutaway side view showing the whole including FIG.

  Referring to FIG. 3, the present embodiment has substantially the same configuration as that of the embodiment according to claim 1 or 2. Therefore, the portion having the same configuration as that of the embodiment according to claim 1 or 2 is claimed as follows. The same reference numerals as those in the embodiment according to 1 or 2 are assigned, and the description thereof is omitted, and only different parts are described.

  In the present embodiment, a magnetic frame 77 is disposed on the opposite side of the two magnets 69a and 69b for driving the reed switch from the surface facing the magnetically sensitive switch (reed switch 23), and the reed switch driving magnet. 69a and 69b have two poles on one side on the surface facing the magnetically sensitive switch (reed switch 23).

  Therefore, in the proximity switch mechanism of the present embodiment, the magnetic flux 31 generated from the magnets 69 a and 69 b can secure a sufficient magnetic flux necessary for the operation of the reed switch 23. Furthermore, since the two magnets can be installed apart from each other, a sufficient magnetic flux necessary for operation can be secured even if a small magnet is used.

  In the partially cutaway side view of the proximity switch mechanism 75 of the foldable electronic device shown in FIG. 3C, it is formed on the printed circuit board 21 at the end of the lower housing 35 that is openably and closably connected via the hinge portion 37. The reed switch 23 is provided, and magnets 69 a and 69 b provided at positions facing the magnetic body frame 77 and the reed switch 23 at the end of the upper housing 33.

  4A and 4B show a proximity switch mechanism in which a notch is provided in a magnet in an embodiment according to claim 4 of the present invention, FIG. 4A is a perspective view, and FIG. 4B is FIG. It is sectional drawing in the DD line shown to).

  Referring to FIG. 4, the present embodiment has substantially the same configuration as that of the embodiment according to claim 1 or 2. Therefore, the portion having the same configuration as that of the embodiment according to claim 1 or 2 is claimed as follows. The same reference numerals as those in the embodiment according to 1 or 2 are assigned, and the description thereof is omitted, and only different parts are described.

  By providing a notch 83 on the side of the reed switch driving magnet 81 facing the magnetically sensitive switch of the present embodiment, the surface facing the magnetically sensitive switch has two poles on one side.

  Therefore, in the proximity switch mechanism 79 of the present embodiment, a sufficient magnetic flux necessary for the operation of the reed switch 23 can be secured by the magnetic flux 31 generated from the magnet 81.

  FIG. 5 shows an embodiment according to claim 5 of the present invention, and shows a proximity switch mechanism in which the reed switch driving magnet is a horseshoe-shaped magnet, FIG. 5 (a) is a perspective view, and FIG. 5 (b) is FIG. Sectional drawing in the EE line | wire shown to (a), FIG.5 (c) is a partially notched side view which shows the whole containing FIG.5 (a).

  Referring to FIG. 5, the present embodiment has substantially the same configuration as that of the embodiment of claim 1, 2, or 4. The same reference numerals as those of the first, second, and fourth embodiments are attached, the description thereof is omitted, and only different portions will be described.

  The reed switch driving magnet 87 of the present embodiment is a horseshoe-shaped magnet, and the surface facing the reed switch 23 has two poles on one side.

  Therefore, the proximity switch mechanism 85 of the present embodiment can secure a sufficient magnetic flux necessary for the operation of the reed switch 23 by the magnetic flux 31 generated from the horseshoe magnet.

  In the partially cutaway side view of the proximity switch mechanism of the foldable electronic device shown in FIG. 5 (c), it is provided on the printed circuit board 21 at the end of the lower casing 35 that is openably and closably connected via a hinge portion 37. The reed switch 23 and a magnet 87 provided at a position facing the reed switch 23 at the end of the upper housing 33.

  FIG. 6 is an embodiment according to claim 6 of the present invention, and shows a proximity switch mechanism in which a horseshoe-shaped magnet is used as a drive magnet and its magnetic pole end surface is arranged so as to protrude from the surface of an adjacent magnetic body, 6A is a perspective view, FIG. 6B is a cross-sectional view taken along line E′-E ′ shown in FIG. 6A, and FIG. 6C is an overall view including FIG. 6A. It is a part notch side view.

  In the proximity switch mechanism 89 shown in the perspective and sectional views of FIGS. 6A and 6B, the reed switch driving magnet 87 is denoted by T in FIG. 6B from the lower surface of the adjacent magnetic body 27. Protrusions as shown. That is, with respect to the first and second space regions separated by one plane including the surface facing the reed switch 23 in the magnet 87, the magnet 87 and the magnetic body are disposed in the first space region (upper side of the plane). 27 and the magnetic body 27 do not touch the boundary plane, and the magnetically sensitive switch is positioned in the second space region (lower side of the plane).

  Therefore, in the proximity switch mechanism 89 of this embodiment, only a small part of the magnetic flux 31 generated from the magnet 87 is a leakage magnetic flux as compared with the embodiment according to claim 5 in FIGS. 5 (a) and 5 (b). As a result, a sufficient magnetic flux necessary for the operation of the reed switch can be secured without leaking to the magnetic body 27.

  In the partially cutaway side view of the proximity switch mechanism of the foldable electronic device shown in FIG. 6C, it is provided on the printed circuit board 21 at the end of the lower casing 35 that is openably and closably connected via the hinge portion 37. The reed switch 23 and a magnet 87 provided at a position facing the reed switch 23 at the end of the upper housing 33.

  FIG. 7 shows an embodiment according to claim 8 of the present invention, which shows a proximity switch mechanism using a magnetically sensitive switch having a case and having an external terminal pulled out on one side, and FIG. A perspective view and FIG.7 (b) are sectional drawings in the FF line | wire shown to Fig.7 (a).

  Referring to FIG. 7, the present embodiment has substantially the same configuration as that of the first, second, fifth or sixth embodiment, and therefore the same configuration as the first, second, fifth or sixth embodiment. The same reference numerals are assigned to the portions, the description thereof is omitted, and only portions having different configurations will be described.

  The magnetically sensitive switch 93 of the present embodiment is a proximity switch having a case and a terminal drawn out on one side. In the magnetic sensitive switch 93, a harness (lead wire) 101 is connected to the longitudinal direction of the external terminal with solder 103 or the like, and a filling / adhesive 105 is filled between the insulating container and the case 95, and then the magnetic sensitive switch is used. A switch 93 is mounted on the printed circuit board 21.

  The magnetically sensitive switch 93 is configured such that a hole 97 of the case is fixed on the printed board 21 with a screw 99.

  On the other hand, the reed switch driving magnet 87 is a horseshoe-shaped magnet, and the surface facing the magnetically sensitive switch has two poles on one side.

  FIG. 8 shows the proximity switch mechanism 107 of the embodiment according to claim 9 or claim 10, and shows the proximity switch mechanism in which the magnetically sensitive switch is implemented by a Hall IC or MR element (Magnetic Resistor). It is a perspective view.

  Referring to FIG. 8, the present embodiment has substantially the same configuration as the fifth, sixth, seventh or eighth embodiment, and therefore the same configuration as the fifth, sixth, seventh or eighth embodiment. These parts are given the same reference numerals as those of the embodiment, description thereof is omitted, and only parts having different configurations will be described.

  The magnetic sensitive switch 109 according to the present embodiment includes a magnetic detection element 111 of a Hall IC or MR element and a switching circuit 113 (not shown). The magnetically sensitive switch 109 is fixedly connected to a conductor pattern (not shown) on the printed circuit board 21 by soldering or the like.

  On the other hand, the driving magnet 87 is disposed in the vicinity of or close to the magnetic body 27 such as a frame of a liquid crystal panel, for example, and the surface facing the magnetic sensitive switch 109 has two poles on one side.

  Further, the drive magnet 87 protrudes from the lower surface of the magnetic body 27 adjacent to the magnetic sensitive switch facing surface in the same manner as in FIG.

  Therefore, it is a matter of course that the same effect as in the case of the reed switch can be obtained even when a Hall IC, MR element or the like is used as the magnetically sensitive switch in the proximity switch mechanism of the present embodiment.

  Further, the proximity switch mechanism according to any one of claims 1 to 10 can be applied not only to a folding type electronic device but also to a slide type or a separate type electronic device. Of course.

  Further, the proximity switch mechanism according to any one of claims 1 to 10 is the same when the magnetically sensitive switch is a case-type reed switch, a resin-molded reed switch, or a board-mounted proximity switch. Needless to say, the effect can be obtained and applied.

  As is apparent from the above description, in the embodiments of claims 1 to 13 of these magnetically sensitive switches, the magnetically sensitive switch can be reliably operated even when there is a magnetic body close to the driving magnet. I can do it.

  Further, although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in this invention. For example, in the above embodiment, the on / off relationship between the operating state and the non-operating state of the magnetically sensitive switch may be reversed. Further, the positional relationship between the magnetically sensitive switch and the upper casing and the lower casing of the magnet may be opposite to the case of each embodiment. Further, the positions of the magnetically sensitive switch and the magnet are not limited to the illustrated end, but may be other places. Further, the relationship between the polarities of the magnets (N pole, S pole) may be reversed.

1 shows a proximity switch mechanism in which a magnetically sensitive switch is implemented by a reed switch according to an embodiment of the present invention, FIG. 1 (a) is a perspective view, and FIG. 1 (b) is shown in FIG. 1 (a). Sectional drawing in the AA line, FIG.1 (c) is a partially notched side view which shows the whole containing FIG.1 (a). FIG. 2 shows a proximity switch mechanism in which yokes are arranged on two magnets in an embodiment according to claim 2 of the present invention, FIG. 2 (a) is a perspective view, and FIG. 2 (b) is a view B shown in FIG. 2 (a). Sectional drawing in the -B line. FIG. 3A shows a proximity switch mechanism in which two magnets are arranged on a magnetic body frame in an embodiment according to claim 3 of the present invention, FIG. 3A is a perspective view, and FIG. 3B is FIG. Sectional drawing in the CC line shown, FIG.3 (c) is a partially notched side view which shows the whole containing FIG. 3 (a). FIG. 4A is a perspective view showing a proximity switch mechanism in which a notch is provided in a magnet in an embodiment according to claim 4 of the present invention, and FIG. Sectional drawing in D line. FIG. 5A shows a proximity switch mechanism in which a magnet is a horseshoe-shaped magnet according to an embodiment of the present invention, FIG. 5A is a perspective view, and FIG. 5B is an EE shown in FIG. Sectional drawing in a line, FIG.5 (c) is a partially notched side view which shows the whole containing FIG.5 (a). An embodiment according to claim 6 of the present invention shows a proximity switch mechanism in which a horseshoe-shaped magnet is used as a drive magnet, and its magnetic pole end surface is arranged so as to protrude from the surface of an adjacent magnetic body. ) Is a perspective view, FIG. 6B is a cross-sectional view taken along line E'-E 'shown in FIG. 6A, and FIG. 6C is a partially cutaway side view showing the whole including FIG. 6A. Figure. FIG. 7A is a perspective view showing a proximity switch mechanism using a magnetically sensitive switch having a case and having an external terminal pulled out on one side, in an embodiment according to claim 8 of the present invention. 7 (b) is a sectional view taken along line FF shown in FIG. 7 (a). In the embodiment which concerns on Claim 9 or 10 of this invention, the perspective view which shows the proximity switch mechanism which used Hall IC or MR element, and the switching circuit for the magnetically sensitive switch. FIG. 9A shows a proximity switch mechanism of Conventional Example 1, FIG. 9A is a perspective view, FIG. 9B is a cross-sectional view taken along line GG shown in FIG. 9A, and FIG. 9C is FIG. The partially notched side view which shows the whole containing a). The proximity switch mechanism of the prior art example 2 is shown, Fig.10 (a) is a perspective view, FIG.10 (b) is sectional drawing in the HH line shown to Fig.10 (a). The proximity switch mechanism of the prior art example 3 is shown, Fig.11 (a) is a perspective view, FIG.11 (b) is sectional drawing in the II line | wire shown to Fig.11 (a). FIG. 12A shows an attraction magnetic circuit (proximity switch mechanism) of Conventional Example 4, FIG. 12A is an explanatory view showing a case where an electronic device is closed, FIG. 12B is an explanatory view showing a case where the electronic device is opened, FIG. (C) is explanatory drawing which shows the magnetic flux between the magnet and reed switch at the time of the open.

Explanation of symbols

11, 47, 55, 67, 71, 75, 79, 85, 89, 91, 107 Proximity switch mechanism 13 Glass tube 15 Lead piece 15a One end 15b Enclosed portion 17 External terminal 17a Connection portion 19 Rolled external terminal 21 Printed circuit board 21a, 21b Connection point 23, 45 Reed switch 25, 61a, 61b, 69a, 69b, 81, 87 Magnet 27 Magnetic body 29 Liquid crystal panel 31 Magnetic flux 33 Upper housing 35 Lower housing 37 Hinge portion 41, 95 Case 43, 105 Filling・ Adhesives 93, 109 Magnetic sensitive switch 49 Spacer plate 57 Auxiliary magnet 65 Main body
73 Yoke 77 Magnetic body frame 83 Notch 97 Case hole 99 Screw 101 Harness 103 Solder 111 Magnetic detection element 113 Switching circuit

Claims (13)

  In a proximity switch mechanism that detects the proximity or separation of two independent mechanisms as components of an electronic application device including a magnetic body by proximity or separation between two magnets and a magnetically sensitive switch, the two magnets are: The magnetically sensitive switch is disposed on one of the two independent mechanism portions, and is disposed on the other of the two independent mechanical portions to face the two magnets, and with the magnetically sensitive switch in the two magnets. Proximity switch mechanism characterized in that opposing surfaces have different polarities.   2. The proximity switch mechanism according to claim 1, wherein a yoke or a soft magnetic plate is disposed on a side opposite to a surface facing the magnetically sensitive switch in the two magnets.   A part of the magnetic body is disposed in contact with the opposite side of the surface of the two magnets facing the magnetic sensitive switch, and the magnetic body guides the magnetic flux emitted from one of the two magnets to the other magnet. The proximity switch mechanism according to claim 1, wherein the proximity switch mechanism is a magnetic path.   In a proximity switch mechanism that detects the proximity or separation of two independent mechanisms as a component of an electronic application device including a magnetic body by proximity or separation between a magnet and a magnetically sensitive switch, the magnet is the two independent The magnetically sensitive switch is disposed on one of the mechanical parts, and is disposed on the other of the two independent mechanical parts and faces the magnet, and is cut at the center of the surface of the magnet facing the magnetically sensitive switch. A proximity switch mechanism, wherein a notch is provided, and magnetic poles having different polarities are formed with the notch as a boundary.   In a proximity switch mechanism that detects the proximity or separation of two independent mechanisms as a component of an electronic application device including a magnetic body by proximity or separation between a magnet and a magnetically sensitive switch, the magnet is the two independent The magnetic sensitive switch is disposed on one side of the mechanism part, and is disposed on the other of the two independent mechanical parts to face the magnet, and the magnet is formed of a horseshoe-shaped magnet on a surface facing the magnetic sensitive switch. A proximity switch mechanism characterized in that two magnetic pole tips are arranged.   Whereas the magnet and the magnetic body are located in the first space region and the first and second space regions are separated by a single plane including a surface of the magnet facing the magnetic sensing switch, the magnet The proximity switch mechanism according to any one of claims 1 to 5, wherein a body does not contact the plane and a magnetically sensitive switch is located in the second space region.   The proximity switch mechanism according to claim 1, wherein the magnetically sensitive switch includes a reed switch.   The proximity switch mechanism according to claim 7, wherein the magnetically sensitive switch includes a case for storing a reed switch and / or a harness for pulling out a terminal.   The proximity switch mechanism according to any one of claims 1 to 6, wherein the magnetically sensitive switch includes a Hall IC and a switching circuit.  The proximity switch mechanism according to claim 1, wherein the magnetically sensitive switch includes an MR element and a switching circuit.   The electronic application device is a foldable electronic device that opens and closes via a hinge, and the two independent mechanisms rotate around the hinge and move closer to or away from each other. Item 11. The proximity switch mechanism according to any one of Items 10.   The proximity switch mechanism according to any one of claims 1 to 10, wherein the electronic application device is a slide-type electronic device in which two independent mechanism portions move in parallel with each other.   The proximity switch according to any one of claims 1 to 10, wherein the electronic application device is a separate type electronic device in which the two independent mechanism portions move perpendicularly to a surface facing each other. mechanism.

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