JP2005116410A - Touch sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a touch sensor capable of easily moving and adjusting a magnet in a sliding direction, with maintaining a predetermined lateral distance between a Hall IC and a magnet. <P>SOLUTION: The touch sensor 1 comprises a casing 2 having a magnet 7 arranged on inner end side of a sliding shaft 5 energized by a spring 4 towards outside, and a Hall IC 9 arranged in side area of a sliding area of the magnet 7. The magnet 7 can be moved in the sliding direction of the sliding shaft 5. Fine adjustment of a switch operation point can be achieved by moving the magnet, with maintaining the distance between the Hall IC 9 in a lateral direction as it is. Specifically, the magnet 7 is housed inside a hollow part on the inner end side of the sliding shaft 5, to allow the switch operation point to be moved in one sliding direction by a spring 23, and in other sliding direction by a screw shaft 24 as opposed to the spring 23. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a touch sensor that performs a switch operation by detecting a magnetic field of a magnet by a Hall IC.

  A conventional touch sensor of this type is shown in FIG. This is because a magnet 55 is mounted inside a sliding body 54 that is pressed and biased outward by a spring 53 so that an outer end 52 that comes into contact with an object to be measured (not shown) protrudes from the casing 51. The Hall IC 57 is installed on the side wall surface 56 along the sliding direction S of the magnet 55, and the magnetic field of the magnet 55 that the Hall IC 57 slides in relation to the object to be measured is detected (N pole of the magnet). And the detection point b of the Hall IC reacts to the boundary point a between the S pole and the S pole.

  The Hall IC 57 reacts with the S pole of the magnet 55. In this case, if the distance D in the side-by-side direction between the Hall IC 57 and the magnet 55 is set to a distance that “reliably reacts with the S pole”, the sensitivity variation of each Hall IC 57 or the magnetic field of the magnet 55 Even if there is a variation in strength, the operating position hardly changes. Accordingly, if the positional relationship in the sliding direction (S direction) between the Hall IC 57 and the magnet 55 is kept constant while maintaining the distance in the side-by-side direction, the operating point for each product [ON → OFF (closed → open), OFF → ON (Open → Close)] does not vary.

  However, in the conventional touch sensor, when it is necessary to adjust the positional relationship in the sliding direction in order to correct the operating point for each product, the Hall IC 57 is peeled off from the wall surface 56 where it is installed. However, adjustment was extremely difficult due to variations in work.

  The present invention was created in view of the above points, and the object of the present invention is to make it possible to easily move and adjust the magnet in the sliding direction while keeping the distance in the side-by-side direction between the Hall IC and the magnet constant. Is to provide a touch sensor.

  In order to achieve the above object, a touch sensor according to the present invention is installed on the inner end side of a sliding shaft that is spring-biased outward and on the side of the sliding area of the magnet. In the touch sensor including the Hall IC, the magnet is configured to be movable in the sliding direction of the sliding shaft.

  In the touch sensor according to the second aspect of the present invention, the magnet is housed in an inner end side cavity of the sliding shaft, and is moved by a spring in one of the sliding directions, and the spring is moved in the other. It was configured to move against the screw shaft.

  A touch sensor according to the present invention includes a magnet installed on the inner end side of a sliding shaft that is spring-biased outward, and a Hall IC installed on the side of the sliding area of the magnet. In the sensor, since the magnet is configured to be movable in the sliding direction of the sliding shaft, the fine adjustment of the switch operating point can be easily performed by moving the magnet while keeping the distance from the Hall IC side by side. There is an effect.

  In the touch sensor according to the second aspect of the present invention, the magnet is housed in an inner end side cavity of the sliding shaft, and is moved by a spring in one of the sliding directions, and the spring is moved in the other. Since it is configured to move against the screw shaft, the switch operating point can be easily finely adjusted by simply rotating the screw shaft in the loosening or tightening direction.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a side sectional view showing a state of the touch sensor of the present application in a normal state, FIG. 2 is a side sectional view showing a state in which the touch sensor of the present application is operated, FIG. 3 is an enlarged sectional view of a main part, and FIG. It is a principal part expanded sectional view after moving a magnet from this state.

  As shown in FIG. 1, the touch sensor 1 of the present application is a slide urged outwardly by a spring 4 so that an outer end 3 that comes into contact with an object to be measured (not shown) protrudes from a casing 2. A magnet 7 is installed in a hollow portion 6 provided at the inner end portion of the moving shaft 5 so that the installation position of the magnet 7 can be moved, and is aligned side by side with the Hall IC 9 installed on the side wall surface 8 of the sliding area. The distance can be adjusted.

  The sliding shaft 5 includes a first portion 5 a having an outer end portion 3 and a second portion 5 b having a hollow portion 6, which are separately formed. The first portion 5 a is in sliding contact with the first chamber 10, and the second portion 5 b is in the second chamber 12 that is enlarged to the first chamber 10 through the step portion 11. The second chamber 12 is provided with a third chamber 14 which is further enlarged via a stepped portion 13 adjacent thereto.

  The first portion 5 a is configured such that the inner end side flange portion 15 comes into contact with the stepped portion 11 and is prevented from sliding outward, and the ring 16 fitted closer to the outer end portion 3 comes into contact with the stopper 17. Inward sliding is regulated.

  Further, the outer end 5b 'of the second portion 5b contacts the inner end of the first portion 5a, the inner end side of the second portion 5b having the cavity 6 has a large diameter, and the large-diameter end face 18 has The inner end of the second chamber 12 is in contact with the end of the inner hole of the cylindrical portion 19 inserted and inserted. The second portion 5b is urged outward by the spring 4 interposed between the ring 20 fitted near the outer end thereof and the cylindrical portion 19, and at the same time, the first portion 5a. Is pushing. Therefore, when the outer end portion 3 of the first portion 5a is pushed inward by the object to be measured (not shown), the force is transmitted from the first portion 5a to the second portion 5b, and as shown in FIG. 4 is slid inwardly while being compressed. When the object to be measured (not shown) escapes, the state of FIG. In other words, the sliding shaft 5 is configured separately from the first portion 5 a and the second portion 5 b, but always slides integrally by the action of the spring 4.

  The cylindrical portion 19 is configured integrally with a main cylindrical portion 21 installed in the third chamber 14, and the hollow portion 6 of the sliding shaft 5 that slides in the inner hole between the cylindrical portion 19 and the cylindrical main portion 21. Inside, as described above, the magnet 7 is installed, and the Hall IC 9 is installed on the side wall surface 8 of the sliding area of the sliding shaft 5. The wall surface 8 provided with the Hall IC 9 corresponds to the bottom surface of the cutout portion 22 provided in the cylinder main portion 21.

  The magnet 7 installed in the hollow portion 6 of the sliding shaft 5 is moved by the pressure of the spring 23 in one of the sliding directions (arrow B direction) and in the other of the sliding directions (arrow B direction). The screw 23 can be moved against the spring 23. The screw shaft 24 is supported by a screw receiver 25 fitted into the inner end of the cavity 6.

  Next, the movement of the magnet 7 will be described. For example, when the magnet 7 is installed as shown in FIG. 3, if the screw shaft 24 is moved rightward (in the loosening direction) in the drawing as shown in FIG. 4, the magnet 7 is pressed by the pressure of the spring 23. Then, it moves in the right direction (arrow A direction) in the figure. On the other hand, when the magnet 7 is installed as shown in FIG. 4, if the screw shaft 24 is moved in the left direction (tightening direction) as shown in FIG. 3, the magnet 7 resists the spring 23. Thus, it moves in the left direction (arrow B direction) in the figure.

  As described above, by rotating the screw shaft 24 in the loosening or tightening direction, the magnet 7 can be arbitrarily moved in the sliding direction of the sliding shaft 5 while maintaining the horizontal alignment distance with the Hall IC 9. . Therefore, the switch operating point by the magnet 7 and the Hall IC that detects the magnetic field can be arbitrarily adjusted (including fine adjustment).

  The screw shaft 24 may be fixed so as not to loosen after adjustment. 3 and 4 (the left side is the S pole and the right side is the N pole), the operation of the Hall IC 9 is switched from ON to OFF (closed to open). It is also possible to switch from OFF to ON (open to closed) by reversing the polarity (S pole and N pole).

It is side surface sectional drawing which shows the state (normal time) which the sliding shaft of this-application touch sensor slid outward. It is side surface sectional drawing which shows the state (at the time of measurement of a to-be-measured object) which the sliding axis | shaft of this-application touch sensor slid inward. It is a principal part expanded sectional view which shows the state which moved the magnet to the left direction. It is a principal part expanded sectional view which shows the state which moved the magnet to the right direction. It is sectional drawing which shows the conventional touch sensor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 This application touch sensor 2 Casing 3 Outer end part 4 Spring 5 Sliding shaft 5a 1st part 5b 2nd part 5b 'Outer end of 2nd part 6 Cavity part 7 Magnet 8 Wall surface 9 Hall IC
DESCRIPTION OF SYMBOLS 10 1st chamber 11 Step part 12 2nd chamber 13 Step part 14 3rd chamber 15 Eaves part 16 Ring 17 Stopper 18 Diameter large end surface 19 Cylinder part 20 Ring 21 Main cylinder part 22 Notch part 23 Spring 24 Screw shaft 25 Screw receiving body

Claims (2)

  In a touch sensor comprising a magnet installed on the inner end side of a sliding shaft spring-biased outward and a Hall IC installed on the side of the sliding area of the magnet, the magnet installation position A touch sensor characterized in that it can be moved in the sliding direction.   The magnet is housed in a hollow portion on the inner end side of the sliding shaft, and is moved by a spring in one of the sliding directions and moved by a screw shaft against the spring in the other. The touch sensor according to claim 1, wherein:

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