JP2009009805A - Non-contact type switch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress variations of positions of magnets in which output signals from a device body can be switched. <P>SOLUTION: This non-contact type switch device 1 is equipped with the magnet M reciprocable according to operation from an operator, a magnetism detecting element (GMR element) 34 to detect magnetism from the magnet M; and a lead frame 32 to which the magnetism detecting element 34 is mounted. The non-contact type switch device switches the output signal according to magnetism detected by this magnetism detecting element 34, positions both the magnet M and the magnetism detecting element 34 with a specific part of the lead frame 32 as a reference. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a non-contact switch device, and more particularly to a non-contact switch device that switches an output signal by detecting the direction of a magnetic field from a reciprocating magnet with a GMR element.

Conventionally, a non-contact type comprising a magnet configured to be reciprocable by a movable member and a magnetic sensor using a magnetic detection element close to the magnet, and switching an output signal of the magnetic detection element in accordance with the position of the magnet A switch device (magnetic proximity switch) has been proposed (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2003-197078

  However, in the conventional non-contact type switching device as described above, since it is difficult to accurately align the magnetic sensor and the magnet, the position of the magnet to which the output signal from the device main body is switched varies greatly. There is a problem of becoming.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a non-contact switch device that can suppress variations in the position of a magnet to which an output signal from the device main body is switched.

  A non-contact switch device according to the present invention includes a magnet that can reciprocate according to an operation from an operator, a magnetic detection element that detects magnetism from the magnet, and a lead frame on which the magnetic detection element is mounted. A non-contact type switching device that switches an output signal in accordance with magnetism detected by the magnetic detection element, wherein positioning of both the magnet and the magnetic detection element is performed with reference to a specific portion of the lead frame. It is characterized by performing.

  According to the non-contact type switching device, since the positioning of both the magnet and the magnetic detection element is performed with reference to a specific portion of the lead frame, the magnet, the magnetic detection element mounted on the lead frame, and Therefore, it is possible to suppress variations in the position of the magnet to which the output signal from the apparatus main body is switched.

  In the non-contact type switching device, the magnet is incorporated, and further includes a movable member that reciprocates in response to an operation from an operator, and by contacting a specific portion of the lead frame with the movable member, It is preferable to position the magnet. In this case, the magnet is positioned by bringing a specific part of the lead frame into contact with the movable member. The magnet can be positioned.

  For example, in the non-contact type switch device, it is conceivable to use a convex portion or a concave portion formed on the lead frame as a specific portion of the lead frame. In this case, since the convex portion or the concave portion formed in the lead frame is used as the specific portion of the lead frame, the specific portion can be formed with a simple configuration.

  In the non-contact type switching device, it is preferable to use the lead terminal of the lead frame as a surface mounting terminal. Thus, by using the lead terminals of the lead frame as the terminals for surface mounting, the number of parts of the apparatus main body can be reduced, and the cost required for manufacturing can be reduced.

  For example, in the non-contact switch device, it is conceivable that a GMR element that detects the direction of the magnetic field from the magnet is used as the magnetic detection element. By using a GMR element as a magnetic detection element in this way, a non-contact type switching device that can quickly switch an output signal in response to an operation by an operator, compared to a case where a Hall element or the like is used as a magnetic detection element. It becomes possible to provide.

  In particular, in the non-contact type switching device, the magnet can reciprocate in a state where the front and back surfaces are simply two-pole magnetized and the front surface or back surface of the magnet is disposed opposite to the magnetic detection surface of the GMR element. preferable. In this case, the switching operation can be performed quickly without requiring a magnet magnetized in a complicated manner.

  According to the present invention, since both the magnet and the magnetic detection element are positioned with reference to a specific part of the lead frame, the magnet and the magnetic detection element mounted on the lead frame are aligned. Therefore, it is possible to suppress variations in the position of the magnet to which the output signal from the apparatus main body is switched.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an exploded perspective view of a non-contact switch device according to an embodiment of the present invention. FIG. 2 is a perspective view showing an internal configuration of a sensor unit included in the non-contact switch device according to the present embodiment. 3 and 4 are perspective views showing a state in the middle of assembling the non-contact switch device according to the present embodiment. FIG. 5 is a perspective view showing an appearance of the non-contact switch device according to the present embodiment. In FIG. 1, for the convenience of explanation, only the slider included in the non-contact type switch device shows the internal configuration. In the following, the left side shown in FIG. 1 will be referred to as “the left side of the apparatus” or simply “the left side”, and the right side shown in FIG. It shall be called “right side”.

  As shown in FIG. 1, the non-contact switch device 1 according to the present embodiment includes a case 2, a sensor unit 3 attached to the case 2, a compression spring 4 and a slider 5 housed in the case 2, A rubber cover 6 is provided on one end of the slider 5 housed in the case 2, and a cover member 7 is placed on the case 2 on which the sensor unit 3 is mounted while housing these components.

  The case 2 is formed of, for example, a synthetic resin material and has a rectangular parallelepiped shape that is open on the right side of the apparatus. On the upper surface and side surfaces of the case 2, a stepped portion 21 and a stepped portion 22 that accommodate a part of a mounting plate 71 of the cover member 7 described later are formed. A contact piece 23 for restricting the movement of the sensor unit 3 to the left side is formed on the lower side of the case 2 on the left side end of the apparatus. Inside the case 2, a groove portion 24 for accommodating the compression spring 4 and the slider 5 is formed. The groove portion 24 has a rectangular cross section. A shaft portion 25 that is inserted into the compression spring 4 is formed on the inner wall on the left side of the groove portion 22 (not shown in FIG. 1, see FIG. 7).

  The sensor unit 3 is disposed in the sensor holder 31, the plurality of lead frames 32 fixed to the sensor holder 31 with the terminal portions 32 a exposed downward, and mounted on the lead frame 32. It consists of the component parts. On the lower surface of the sensor holder 31, there is formed a step portion that accommodates a part of a mounting plate 71 of the cover member 7 described later. As shown in FIG. 2, a control IC 33, a GMR element 34, a capacitor 35, and a diode 36 are mounted on the lead frame 32. Since these components are mounted on the lead frame 32 by a mounter device or the like, they are fixed on the lead frame 32 with high accuracy.

  The GMR element 34 has a magnetic detection surface disposed so as to face a magnet M fitted in a slider 5 described later, and detects the direction of the magnetic field from the magnet M. The control IC 33 calculates the position of the magnet M from the output signal of the GMR element 34. The capacitor 35 is used to protect the control IC 33 from noise and the like, and the diode 36 is used to prevent reverse connection to the control IC 33. In the non-contact switch device 1 according to the present embodiment, a magnetic field from a magnet M, which will be described later, is applied to the GMR element 34, and a change in the electrical resistance value of the GMR element 34 is generated by the magnetic field, and the control IC 33 Then, the position of the magnet M is detected from the output signal of the GMR element 34. Then, the output signal (ON / OFF signal) from the non-contact switch device 1 is switched according to the detected position of the magnet M.

  Hereinafter, the configuration of the lead frame 32 and the relationship between the lead frame 32 and these components will be described. As shown in FIG. 2, the lead frame 32 has first to fourth lead frames 321 to 324. The first to fourth lead frames 321 to 324 include a pair of lead terminals 321a to 324a, respectively. The lead terminals 321a to 324a are suspended downward as shown in FIG. 2, and are exposed downward from a slit of the sensor holder 31 formed in advance. These lead terminals 321a to 324a are used as terminals for surface mounting on a substrate (not shown). Thus, by using the lead terminals 321a to 324a as the terminals for surface mounting, the number of parts of the apparatus main body can be reduced, and the cost required for manufacturing can be reduced.

  The first lead frame 321 protrudes from the right end of the sensor holder 31. And the control piece 37 bent upwards is formed in the center part of the protrusion part. The restricting piece 37 restricts the movement of the slider 5 to the right side beyond a certain position. Further, it is used as a specific portion of the lead frame 32 for positioning the magnet M and the GMR element 34 respectively. A control IC 33 and a GMR element 34 are mounted on the upper surface of the second lead frame 322. An accommodation portion 322 b that accommodates one side end portion of the capacitor 35 is formed.

  The third lead frame 323 is formed with an accommodating portion 323 b that accommodates the other side end portion of the capacitor 35. The capacitor 35 is mounted on the housing portion 322b and the housing portion 323b. The third lead frame 323 is formed with a housing portion 323 c that houses one side end portion of the diode 36. The fourth lead frame 324 is formed with a housing portion 324 b that houses the other side end portion of the diode 36. The diode 36 is mounted on the housing portion 323c and the housing portion 324b. The fourth lead frame 324 protrudes from the left end of the sensor holder 31 (not shown in FIG. 2, see FIG. 6).

  The compression spring 4 is accommodated in the groove 24 of the case 2. One end on the left side of the apparatus is held by a shaft portion 25 formed in the groove portion 24, while one end on the right side is held by being housed inside the slider 5. Thus, the both ends are held by the case 2 and the slider 5, thereby applying an urging force for pushing the slider 5 to the right side of the apparatus.

  The slider 5 is formed of, for example, a synthetic resin material and has a shape corresponding to the groove portion 24 of the case 2. That is, the slider 5 has a generally rectangular parallelepiped shape. The slider 5 has a shape opened to the upper side of the apparatus, and this opening portion is connected to an accommodation groove 51 for accommodating the compression spring 4 formed inside the slider 5. The housing groove 51 has a peripheral surface corresponding to the outer shape of the compression spring 4.

  A projecting piece 52 having a generally cylindrical shape is formed on the side surface on the right side of the slider 5. An operation piece 53 having a columnar shape with a smaller diameter than that of the protruding piece 52 is formed on the side surface on the right side of the protruding piece 52. The tip of the operation piece 53 is provided in a substantially spherical shape and exposed through a hole 62 of the rubber cover 6 described later. Below the protruding piece 52, a protruding piece 54 that slightly protrudes to the right side of the apparatus is formed. The protruding piece 54 comes into contact with a regulating piece 37 formed on the lead frame 32. A rectangular opening 55 is formed on the lower surface of the slider 5, and a magnet M is fitted in the opening 55.

  The rubber cover 6 has a generally flat plate shape, and has a dome-shaped portion 61 at a position corresponding to the protruding piece 52 of the slider 5. A space is formed inside the dome-shaped portion 61 so that the protruding piece 52 can be accommodated from the left side of the apparatus. A hole 62 is formed at the top of the dome-shaped portion 61, and a part of the operation piece 53 of the slider 5 can be exposed from the hole 62.

  The cover member 7 is formed, for example, by bending a metal plate punched into a predetermined shape, and has four attachment plates 71a to 71d extending to the left side shown in FIG. The mounting plates 71a and 71b are arranged to face each other with a certain distance, and the mounting plates 71c and 71d are arranged to face each other with a certain distance. The mounting plate 71 a is accommodated in the stepped portion 21 of the case 2, and the mounting plate 71 b is accommodated in the stepped portion formed on the lower surface of the sensor holder 31. The mounting plates 71 c and 71 d are accommodated in the step portion 22 of the case 2. In this manner, the case 2 and the sensor unit 3 are sandwiched from the upper and lower surface directions by the mounting plates 71a and 71b, while the case 2 and the sensor unit 3 are integrated by sandwiching the case 2 from the side surface by the mounting plates 71c and 71d. Yes.

  A circular opening 72 is formed on the surface of the cover member 7 on the right side of the apparatus. The dome-shaped portion 61 of the rubber cover 6 is configured to be exposed from the opening 72 to the right side of the apparatus. In the non-contact switch device 1 according to the present embodiment, the cover member 7 that covers the case 2 in this manner serves as a magnetic shield that blocks magnetism from the outside.

  When assembling the non-contact type switch device 1 having such a configuration, as shown in FIG. 3, the compression spring 4 and the slider 5 are accommodated in the groove portion 24 of the case 2, and the protruding piece 52 protruding from the case 2. The rubber cover 6 is put on the operation piece 53. Thereby, the tip of the operation piece 53 is disposed so as to protrude from the hole 62 of the dome-shaped portion 61. Then, the case 2 in this state is arranged on the sensor holder 31 of the sensor unit 3 as shown in FIG. 4, and the cover member 7 is covered from the right side shown in FIG. At this time, the cover member 7 has a mounting plate 71 a and mounting plates 71 c and 71 d accommodated in the stepped portion 21 and the stepped portion 22 of the case 2, respectively, while the mounting plate 71 b is formed on the lower surface of the sensor holder 31. Is housed in.

  When the tips of the mounting plate 71 a and the mounting plates 71 c and 71 d abut against the end portions on the back side of the stepped portion 21 and the stepped portion 22, respectively, while the tip of the mounting plate 71 b is pushed to a position where it abuts against the contact piece 23 As shown in FIG. 5, the case 2 and the sensor unit 3 are held by the cover member 7. As a result, the case 2 and the sensor unit 3 are integrated, and only the terminal portion 32a of the lead frame 32 protrudes downward.

  When attached in this way, the dome-shaped portion 61 of the rubber cover 6 protrudes from the opening 71 of the cover member 7 to the right side of the apparatus. Further, the operation piece 53 of the slider 5 projects from the hole 62 of the dome-shaped portion 61 to the right side of the apparatus. In the non-contact switch device 1 according to the present embodiment, a pressing operation by the operator is received by the operation piece 53 protruding to the right side of the device in this way, and the slider 5 is provided in the device according to the pressing operation. It is configured to reciprocate in the left-right direction.

  Here, the internal configuration of the non-contact switch device 1 according to the present embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a perspective view for explaining the internal configuration of the non-contact switch device 1 according to the present embodiment. FIG. 7 is a cross-sectional view of the non-contact switch device 1 according to the present embodiment. FIG. 8 is a perspective view showing the relationship between the sensor unit 3 and the magnet M included in the non-contact switch device 1 according to the present embodiment. 7 shows a cross section along the axis of the shaft portion 25 of the case 2 and the operation piece 53 of the slider 5. FIG. 6 and 7 show a state in which the slider 5 is slightly pushed to the left side of the apparatus for convenience of explanation.

  As shown in FIGS. 6 and 7, a compression spring 4 and a slider 5 are accommodated inside the case 2. As shown in FIG. 7, the compression spring 4 has one end on the left side held by the shaft portion 25 and the other end abutting against the inner wall of the slider 5. Is in a state of being energized. In a state where the operator does not perform a pressing operation on the non-contact switch device 1 according to the present embodiment, the projecting piece 54 formed on the slider 5 is in contact with the regulating piece 37 formed on the lead frame 32. Touch. Accordingly, the slider 5 is positioned by the projecting piece 54 and the regulating piece 37 in a state where the pressing operation is not performed.

  Further, as shown in FIGS. 7 and 8, the magnet M fitted in the slider 5 is disposed at a position spaced apart from the GMR element 34 attached to the lead frame 32 by a predetermined distance, and reciprocating motion in the slider 5. In response to this, it moves in the left-right direction shown in FIG. Therefore, in the process in which the slider 5 performs the reciprocating operation, the magnet M is disposed to face the GMR element 34. In particular, since the magnet M is fitted in the slider 5 that is positioned in relation to the restriction piece 37 that is a part of the lead frame 32, the magnet M is positioned in relation to the lead frame 32. .

  Here, the configuration of the GMR element 34 used in the non-contact type switching apparatus 1 according to the present embodiment and the magnet M adjacent thereto will be described. FIG. 9 is a schematic diagram for explaining the configuration of the GMR element 34 used in the non-contact switch device 1 according to the present embodiment. FIG. 9 shows a cross section of the GMR element 34 used in the non-contact switch device 1 according to the present embodiment.

  As shown in FIG. 9, the GMR element 34 used in the non-contact switch device 1 according to the present embodiment basically has an antiferromagnetic layer 34a, a pinned layer 34b, an intermediate layer 34c, The free layer 34d is laminated on the substrate 38, and is configured as a magnetoresistive effect element which is a kind of GMR (Giant Magnet Resistance) element utilizing the giant magnetoresistive effect.

In order for the GMR element 34 to exhibit the giant magnetoresistance effect (GMR), for example, the antiferromagnetic layer 34a is an α-Fe ₂ O ₃ layer, the pinned layer 34b is a NiFe layer, the intermediate layer 34c is a Cu layer, The free layer 34d is preferably formed of a NiFe layer. However, the free layer 34d is not limited to these, and any layer may be used as long as it exhibits a magnetoresistive effect. Further, the GMR element 34 is not limited to the laminated structure as long as it exhibits a magnetoresistive effect.

  The pinned layer 34b of the GMR element 34 shown in FIG. 9 is magnetized by the antiferromagnetic layer 34a, and the magnetization direction is fixed (pinned) in a specific direction by the antiferromagnetic layer 34a. The magnetization direction of the free layer 34d with respect to the magnetization direction of the pinned layer 34b is changed only by the direction of the magnetic field from the magnet M. In addition, the free layer 34d does not restrict the magnetization direction other than the magnetic field from the magnet M. Electrodes 34e (not shown) are bonded to both ends of the GMR element 34. Then, with respect to the fixed magnetization direction of the pinned layer 34b, the magnetization direction of the free layer 34d changes depending on the direction of the magnetic field, so that a change in electrical resistance value between the two electrodes 34e is output as an output signal. .

  The magnet M that causes a magnetic field to act on the GMR element 34 having such a configuration is composed of a magnet whose front and back surfaces are simply two-pole magnetized. In particular, in the non-contact switch device 1 according to the present embodiment, the N pole is magnetized on the surface facing the GMR element 34 and the opposite surface is magnetized on the S pole (FIG. 10). reference).

  Here, the relationship between the GMR element 34 and the magnetic field from the magnet M in the non-contact switch device 1 according to the present embodiment will be described. FIG. 10 is a schematic diagram for explaining the relationship between the GMR element 34 and the magnetic field from the magnet M in the non-contact switch device 1 according to the present embodiment. FIG. 10 shows a case where the center portion of the magnet M is disposed opposite to the center portion of the GMR element 34.

  When the central portion of the magnet M is disposed opposite to the central portion of the GMR element 34, a magnetic field as shown in FIG. When the magnet M that generates such a magnetic field moves in the left-right direction shown in FIG. 10, the change in the electrical resistance value shown in FIG. 11 is obtained in the GMR element 34. FIG. 11 is a diagram for explaining a change in the electrical resistance value in the GMR element 34 according to the position of the magnet M in the non-contact switch device 1 according to the present embodiment. In FIG. 11, the vertical axis indicates the rate of change of the electric resistance value, and the horizontal axis indicates the position of the magnet M. As shown in FIG. 11, it can be seen that the electrical resistance value in the GMR element 34 changes abruptly with the state where the central portion of the magnet M is opposed to the central portion of the GMR element 34 as a boundary.

  Next, the operation in the non-contact switch device 1 according to the present embodiment will be described. FIG.12 and FIG.13 is a perspective view which shows the cross section of the non-contact-type switch apparatus 1 which concerns on this Embodiment. 12 and 13 show cross sections along the axis of the shaft portion 25 of the case 2 and the operation piece 53 of the slider 5.

  FIG. 12 shows a state where the operator has not performed a pressing operation on the non-contact switch device 1 according to the present embodiment. In this case, the slider 5 is pushed out to the rightmost position of the apparatus by the compression spring 4, and the operation piece 53 protrudes rightward from the hole 62 of the dome-shaped portion 61. At this time, the protruding piece 54 formed on the slider 5 is in contact with the regulating piece 37 formed on the lead frame 3. Further, the magnet M fitted into the slider 5 is arranged at a position slightly to the right of the apparatus with respect to the GMR element 34.

  Here, the intensity of the magnetic field in the GMR element 34 and the output voltage of the GMR element 34 when the magnet M is arranged at the position shown in FIG. 12 will be described. FIG. 14 is a diagram for explaining the strength of the magnetic field in the GMR element 34 and the output voltage of the GMR element 34 when the magnet M is arranged at the position shown in FIG. FIG. 14A is a schematic diagram for explaining the positional relationship between the magnet M and the GMR element 34 when the magnet M is arranged at the position shown in FIG. In this case, it is assumed that the center of the magnet M is arranged on the right side of the apparatus by approximately 0.7 mm from the center of the GMR element 34. When the magnet M is arranged at the position shown in FIG. 12, the strength of the magnetic field in the GMR element 34 is about −800 [Oe] as shown in FIG. 14B, and the output voltage of the GMR element 34 is As shown in FIG.14 (c), about 2.37V is shown.

  Then, when a pressing operation is performed by the operator from the state shown in FIG. 12, the slider 4 moves to the left side of the apparatus. In addition, in FIG. 13, it has shown about the state by which pressing operation is performed with respect to the non-contact-type switch apparatus 1 which concerns on this Embodiment, and an output signal switches. In this case, the slider 5 is pushed to the left side of the apparatus against the urging force of the compression spring 4, and the dome-shaped portion 61 is slightly bent. At this time, the protruding piece 54 formed on the slider 5 is separated from the regulating piece 37 formed on the lead frame 3 as the slider 5 moves. Further, as shown in FIG. 13, the center part of the magnet M fitted into the slider 5 is disposed opposite to the center part of the GMR element 34.

  Here, the strength of the magnetic field in the GMR element 34 and the output voltage of the GMR element 34 when the magnet M is arranged at the position shown in FIG. 13 will be described. FIG. 15 is a diagram for describing the strength of the magnetic field in the GMR element 34 and the output voltage of the GMR element 34 when the magnet M is arranged at the position shown in FIG. FIG. 15A is a schematic diagram for explaining the positional relationship between the magnet M and the GMR element 34 when the magnet M is arranged at the position shown in FIG. When the magnet M is arranged at the position shown in FIG. 13, the strength of the magnetic field in the GMR element 34 is 0 [Oe] as shown in FIG. 15B, and the output voltage of the GMR element 34 is as shown in FIG. As shown in (c), 2.5V is shown.

  In the non-contact switch device 1 according to the present embodiment, when the magnet M is arranged on the right side of the device with respect to the position shown in FIG. 13, that is, the output voltage of the GMR element 34 is more than 2.5V. An off signal is output when it is small, while an on signal is output when it is arranged on the left side of the apparatus from the position shown in FIG. 13, that is, when the output voltage of the GMR element 34 is greater than 2.5V. Is set to Accordingly, in the process in which the magnet M moves from the position shown in FIG. 12 to the position shown in FIG. 13, the OFF signal is continuously output, while the process moves from the position shown in FIG. 13 to the position on the left side of the apparatus. Then, the ON signal is continuously output. During the movement of the magnet M in this way, the magnetization direction of the free layer 34d of the GMR element 34 is changed only by the magnetic field from the magnet M, and is regulated by factors other than the magnetic field from the magnet M. Not.

  Thus, in the non-contact switch device 1 according to the present embodiment, the magnet M is positioned with reference to a specific portion of the lead frame 32. As a result, the magnet M and the magnetic detection element (GMR element 34) mounted on the lead frame 32 can be aligned with high accuracy with reference to a specific portion of the lead frame 32. It is possible to suppress variations in the position of the magnet M to which the output signal from is switched.

  Further, in the non-contact switch device 1 according to the present embodiment, the magnet M is incorporated, the slider 5 is provided as a movable member that reciprocates in response to an operation from the operator, and a specific portion of the lead frame 32 is provided. The magnet M is positioned by being brought into contact with the slider 5. Accordingly, for example, the magnet M can be easily positioned by simply bringing the slider 5 into contact with a specific portion of the lead frame 32 with the compression spring 4.

  In particular, in the non-contact switch device 1 according to the present embodiment, the restriction piece 37 formed on the lead frame 32 is used as a specific portion of the lead frame 32. As described above, since the restriction piece 37 formed on the lead frame 32 is used as the specific portion of the lead frame 32, the specific portion used for positioning the magnet M can be formed with a simple configuration.

  Further, in the non-contact switch device 1 according to the present embodiment, the GMR element 34 that detects the direction of the magnetic field from the magnet M is used as the magnetic detection element. In this way, by using the GMR element 34 as a magnetic detection element, a non-contact type switching device that can quickly switch an output signal in accordance with an operation by an operator as compared with a case where a Hall element or the like is used as a magnetic detection element. 1 can be provided.

  In particular, in the non-contact switch device 1 according to the present embodiment, the magnet M is configured by a magnet whose front and back surfaces are simply two-pole magnetized, and the front or back surface of the magnet M is magnetically detected by the GMR element 34. The reciprocating motion is performed in a state of being opposed to the surface. This makes it possible to perform a switching operation quickly without requiring a magnet magnetized in a complicated manner.

  In addition, this invention is not limited to the said embodiment, It can change and implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

  For example, in the above embodiment, the case where the GMR element 34 is used as the magnetic detection element is shown. However, the configuration of the magnetic detection element used in the present embodiment is not limited to this and can be changed as appropriate. For example, a Hall element or the like may be used instead of the GMR element 34. Even when a Hall element or the like is used as described above, it is possible to obtain the same effect as in the above embodiment.

  Moreover, in the said embodiment, the case where it has the control piece 37 formed in the 1st lead frame 321 as an example of the specific part of the lead frame 32 utilized as a reference | standard which positions the magnet M is shown. However, the specific portion of the lead frame 32 is not limited to this and can be changed as appropriate. Although the restricting piece 37 shows an example of a convex portion formed on the lead frame 32, a specific portion of the lead frame 32 may be realized by a convex portion having another aspect. Moreover, if it can utilize as a reference | standard which positions the magnet M, it will not be limited to a convex part, You may make it implement | achieve a specific part with a recessed part.

It is a disassembled perspective view of the non-contact-type switch apparatus which concerns on one embodiment of this invention. It is a perspective view which shows the internal structure of the sensor unit which the non-contact-type switch apparatus which concerns on the said embodiment has. It is a perspective view shown about the state in the middle of assembling the non-contact-type switch apparatus which concerns on the said embodiment. It is a perspective view shown about the state in the middle of assembling the non-contact-type switch apparatus which concerns on the said embodiment. It is a perspective view which shows the external appearance of the non-contact-type switch apparatus which concerns on the said embodiment. It is a perspective view for demonstrating the internal structure of the non-contact-type switch apparatus which concerns on the said embodiment. It is sectional drawing of the non-contact-type switch apparatus which concerns on the said embodiment. It is a perspective view shown about the relationship between the sensor unit which the non-contact-type switch apparatus which concerns on the said embodiment has, and a magnet. It is a schematic diagram for demonstrating the structure of the GMR element utilized for the non-contact-type switch apparatus which concerns on the said embodiment. It is a schematic diagram for demonstrating the relationship between the GMR element in the non-contact-type switch apparatus which concerns on the said embodiment, and the magnetic field from a magnet. It is a figure for demonstrating the change of the electrical resistance value in a GMR element according to the position of a magnet in the non-contact-type switch apparatus which concerns on the said embodiment. It is a perspective view which shows the cross section of the non-contact-type switch apparatus which concerns on the said embodiment. It is a perspective view which shows the cross section of the non-contact-type switch apparatus which concerns on the said embodiment. It is a figure for demonstrating the intensity | strength of the magnetic field in a GMR element when the magnet is arrange | positioned in the position shown in FIG. 12, and the output voltage of a GMR element. It is a figure for demonstrating the intensity | strength of the magnetic field in a GMR element when the magnet is arrange | positioned in the position shown in FIG. 13, and the output voltage of a GMR element.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Non-contact-type switch apparatus 2 Case 24 Groove part 3 Sensor unit 31 Sensor holder 32 Lead frame 33 Control IC
34 GMR element 37 Restriction piece 4 Compression spring 5 Slider 52 Projection piece 53 Operation piece 54 Projection piece 6 Rubber cover 61 Dome shape part 7 Cover member M Magnet

Claims (6)

  A magnet that can reciprocate according to an operation from an operator, a magnetic detection element that detects magnetism from the magnet, and a lead frame on which the magnetic detection element is mounted, and is detected by the magnetic detection element A non-contact switch device for switching an output signal in accordance with magnetism, wherein both the magnet and the magnetic detection element are positioned with reference to a specific portion of the lead frame. apparatus.   The magnet is incorporated, further includes a movable member that reciprocates in response to an operation from an operator, and the magnet is positioned by bringing a specific portion of the lead frame into contact with the movable member. The non-contact switch device according to claim 1.   The non-contact switch device according to claim 1, wherein a convex portion or a concave portion formed on the lead frame is used as a specific portion of the lead frame.   The contactless switch device according to any one of claims 1 to 3, wherein a lead terminal of the lead frame is used as a terminal for surface mounting.   The non-contact type switch device according to any one of claims 1 to 4, wherein a GMR element for detecting a direction of a magnetic field from the magnet is used as the magnetic detection element.   6. The non-contact according to claim 5, wherein the magnet is reciprocally moved in a state in which the front and back surfaces are simply two-pole magnetized and the front or back surface of the magnet is disposed opposite to the magnetic detection surface of the GMR element. Type switch device.

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