JP2000180145A - Electronic part for detecting position - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic part for detecting position in which detection accuracy can be enhanced while simplifying the structure and reducing the size. SOLUTION: An electronic part for detecting position comprises a rod 50 having the forward end abutting against a member to be detected, a slider 70 fixed to the rod 50, a spring means 80 for urging the forward end of the rod 50 to project outward, and upper and lower cases 10, 30 for containing a substrate 90 while projecting the rod 50 outward. The substrate 90 is contained longitudinally in the upper and lower cases 10, 30 which are provided, at the parts abutting against the upper and lower parts of the substrate 90, with parts 25, 39 pressing the substrate 90 when the upper and lower cases 10, 30 are jointed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position detecting electronic component.

[0002]

2. Description of the Related Art Conventionally, many kinds of electronic parts for position detection have been used. In particular, those used for automobiles are required to have a small size, high detection accuracy, and a waterproof structure.

[0003]

However, the conventional position detecting electronic component has a problem in that the structure becomes complicated and the size thereof is increased in order to increase the accuracy thereof, and the cost cannot be reduced. Further, when the position detecting electronic component has a waterproof structure, these problems are further increased.

The present invention has been made in view of the above points, and an object of the present invention is to provide an electronic component for position detection which has a simple structure and can be reduced in size even if the detection accuracy is improved.

It is another object of the present invention to provide a position detecting electronic component which can be easily provided with a waterproof structure.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a rod whose tip abuts on a member to be detected, a slider attached to the rod, and A substrate provided with a contacting conductive pattern, a resilient means for urging the rod to protrude to the outside,
In a position detection electronic component comprising: a case for housing the substrate with the end of the rod protruding to the outside, the case is configured by joining upper and lower cases, and the substrate is At least one of the upper and lower portions of the upper and lower cases where the upper and lower portions of the substrate come into contact with each other is provided with a press contact portion against which the substrate is pressed when the substrate is stored and joined to the upper and lower cases. It is characterized by having. It is preferable that a packing member is sandwiched between joining surfaces of the upper and lower cases to provide a waterproof structure, and a waterproof structure is provided by attaching an elastic member also to a portion of the upper case where the rod projects. Further, the present invention provides a rod having a tip abutting on a member to be detected, a slider attached to the rod, a substrate provided with a conductive pattern with which the slider slidably contacts, and A position detecting electronic component comprising: a resilient means for urging to protrude to the outside; and a case for accommodating the substrate with the end of the rod protruding outside.
The slider is bent so that a portion attached to the rod is a surface that does not face the substrate. Further, the present invention provides a rod having a tip abutting on a member to be detected, a slider attached to the rod, a substrate provided with a conductive pattern with which the slider slidably contacts, and In a position detecting electronic component comprising: a resilient means for urging the rod to protrude, and a case for accommodating the substrate with the tip of the rod protruding to the outside, the resilient member comprises One end is inserted into a resilient means accommodating portion provided on the rod, and the substrate is provided so that a surface on which the conductive pattern is provided is parallel to a moving direction of the rod. It is preferable that a guide mechanism including a groove and a projection extending in the moving direction of the rod is provided between the rod and the case. Preferably, the guide mechanism is provided at a plurality of locations on the outer periphery of the rod so as to stably hold the rod.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a view showing an electronic component for position detection according to an embodiment of the present invention, and FIG.
2 is a schematic side sectional view, and FIG. 2B is a back view of the state where the lower case 30 is removed, as viewed from the back side. As shown in FIG. 1A, the electronic components for position detection are composed of upper and lower cases 10 and 3.
0, a position detecting rod 5 having a slider 70 attached thereto.
0, the resilient means 80, and the substrate 90. Hereinafter, each component will be described.

FIG. 2 shows the lower case 30. FIG. 2A is a plan view, and FIG. 2B is a sectional view taken along the line BB of FIG. FIG. 1A shows a portion corresponding to the AA cross section of FIG. As shown in both figures, the lower case 30 is a molded product of a synthetic resin, and its outer peripheral wall 31
A projection-shaped engaging portion 33 is provided on the upper surface of the outer peripheral wall 31.
Is provided with a storage section 35 inside. Note that the lower case 30 actually extends rightward as shown in FIG. 2A in order to store various components other than the position detection electronic components, but the engaging portion 33 surrounds the whole. Is formed.

On the lower surface of the storage section 35, a columnar guide section 37 is provided.
A press-contact portion (crushed portion) 39 is provided near one side surface of the lower surface and protrudes straight and has a semicircular cross section.

FIG. 3 is a view showing the upper case 10, wherein FIG. 3 (a) is a rear view, FIG. 3 (b) is a sectional view taken along the line CC of FIG. 3 (a), and FIG. It is DD sectional drawing of (a). FIG. 1A shows a portion corresponding to the EE cross section of FIG. 3A. 3 (b) and 3 (c), the lower side in the drawing indicates the upper side.

As shown in FIGS. 3 and 1, the upper case 10 is a molded product made of synthetic resin, and has a concave engaging portion 13 into which the engaging portion 33 of the lower case 30 is inserted. The storage part 15 is formed inside the outer peripheral wall 11. At four corners of the storage portion 15, columnar guide portions 17 extending in the vertical direction are provided. An opening 19 is provided in the housing 15, and a circular concave elastic member housing 21 having a larger diameter than the opening 19 is provided on the upper surface side of the opening 19. The outer peripheral wall 11 is formed so that the entire end face is joined to the end face of the outer peripheral wall 31.

Two convex substrate supporting portions 2 extending in the vertical direction are provided at opposing positions outside the two guide portions 17.
3, 23 are provided.

Between the one substrate supporting portion 23 and the guide portion 17, there is provided a projecting pressure contact portion (crushed portion) 25 which is straight and has a semicircular cross section. A protrusion 27 is provided at a predetermined position, and press-contact portions (crushed portions) 29 are provided on both sides of the protrusion 27. The press-contact portions (crushed portions) 29 are protruded linearly in the vertical direction and have a semicircular cross section.

FIG. 4 is a view showing a rod 50 for position detection, wherein FIG. 4 (a) is a side view and FIG. 4 (b) is a plan view. As shown in FIG. 1 and FIG. 1, the rod 50 is a molded product of a synthetic resin, and is provided with a substantially square base 53 at the lower end of a rod portion 51 extending in a columnar shape. Four corners of the base 53 are cut out in the vertical direction to form a concave guide 55, and two small protrusions 57 are provided on the upper surface of the base 53. A resilient means housing 59 is provided from the lower surface of the base 53 to the inside of the rod 51.

The two small projections 57 of the base 53 are, as shown by dotted lines in FIG. 4A, at the base of the slider 70 made of a metal plate, which is bent at substantially the center at a substantially right angle. The slider 70 is fixed to the base 53 by being inserted into the small hole 71 and the tip thereof being thermally caulked. Thereby, the slider 7
In the case of 0, the portion of the sliding contact portion 73 on the tip side is along the side surface of the base 53.

FIG. 5 is a view showing the substrate 90. As shown in the figure, the substrate 90 is a hard substrate, and is formed by forming a parallel resistive pattern 91 and a conductive pattern 93 (a conductive pattern of both) parallel to each other on one surface. . A circuit pattern 95 is drawn from each of the conductive patterns 91 and 93. The upper side of the substrate 90 is provided with a notch 97 having a size and shape for engaging the protrusion 27 shown in FIG.

Next, a method of assembling the position detecting electronic component will be described. First, as shown in FIG.
The elastic member 110 made of an O-ring is inserted into the 0 elastic member storage portion 21, and a ring-shaped washer 120 is pressed on the elastic member 110 so as to press-fit the outer periphery thereof, and the elastic member 110 is slightly crushed. The elastic member 110 is pressed against the outer periphery of the rod portion 51 to be inserted later, and seals this portion.

Next, the upper case 10 is turned upside down (in the state shown in FIG. 3), and the substrate support portions 23, 23 and the guide portion 1 are formed.
The substrate 90 is inserted vertically into the gap between the gates 7 and 17 (the surface on which the conductive patterns 91 and 93 are provided faces the storage unit 15). At this time, the upper case 1 is inserted into the notch 97 of the substrate 90.
The 0 projection 27 is engaged. The protrusions 27 are provided with pressure contact portions 29, 29 on both side surfaces thereof. In this engagement, both sides of the notch 97 are strongly engaged with the pressure contact portions 29, 29 so that the pressure contact portions 29, 29 are slightly crushed, so that there is no play, and the positioning of the substrate 90 in the left-right direction (the direction of arrow P in FIG. 5) is performed accurately.

Next, as shown in FIG.
Rod 50 in which a slider 70 is mounted in the storage portion 15
And the rod portion 51 is inserted into the opening 19. At this time, the sliding portion 73 of the slider 70 is connected to both conductive patterns 91 and 93.
(See FIG. 5). At the same time, the guide portions 17 are engaged with the four guide portions 55 respectively. In this embodiment, a groove (guide portion 5) extending in the moving direction of the rod 50 is used.
Since the guide mechanism including 5) and the projection (guide portion 17) is provided, the vertical movement of the rod 50 can be accurately and smoothly performed. Note that the guide portion 55 may be a projection and the guide portion 17 may be a groove. In this embodiment, the guide mechanism has a rectangular base 53 of the rod 50 and has a four-point
Although it is provided at two places (two pairs on a diagonal line), only one pair of guide mechanisms may be provided on a diagonal line. When the outer shape of the base 53 is a polygon other than a quadrangle, a circle, or any other shape, the guide mechanism is provided at each of the tops and other positions, that is, at a plurality of positions on the outer periphery of the rod that can stably hold the rod 50. Just do it.

Next, the spring means 80 made of a coil spring is housed in the spring means housing portion 59 of the rod 50.

Next, a rod-shaped packing member 100 made of rubber material is inserted into the groove-shaped engaging portion 13 of the upper case 10 to make the side wall 11 of the upper case 10 go around, and the lower case 30 is put thereon. At this time, the outer peripheral wall 11 and the outer peripheral wall 31 are joined, the engaging portion 33 is inserted into the engaging portion 13, and the packing member 10 is inserted.
0 is crushed and the joint surface is sealed. At the same time, the guide portion 37 is inserted into the spring means 80.

Further, the lower end of the substrate 90 is
The upper end of the substrate 90 contacts the press contact portion 25 of the upper case 10, and the outer peripheral walls 11, 31 of the upper and lower cases 10, 30 do not join with the press contact portion 25 of the upper case 10. Because it is formed in a dimension that floats a little,
By firmly clamping the upper and lower cases 10, 30, the two pressure contact portions 25, 39 are crushed little by little, and in this state, the upper and lower cases 10, 30 are screwed into respective screw holes provided at positions not shown. Is fixed by the fixing means. As a result, the substrate 90 is fixed in the upper and lower cases 10 and 30 at a position where the substrate 90 should be accurately installed without play in the vertical direction.

The slide-type electronic component assembled as described above is attached in a state where the slide-type electronic component comes into contact with a member to detect the tip of the rod portion 51 so as to be elastically contacted. FIG. 1A shows a state in which the rod 50 is pushed substantially halfway.

When the member to be detected moves, the rod portion 51 in contact with the elastic member projects or retracts in accordance with the size of the movement, and the slider 70 of the slider 70 in accordance with the position of the rod 50 shown in FIG. The position of sliding contact with both conductive patterns 91 and 93 changes, and the output changes. Therefore, the position of the member can be accurately detected.

In the case of the present embodiment, the slider 70 attached to the rod 50 is configured to be brought into sliding contact with the conductive patterns 91 and 93 so that the vertical position of the rod 50 is directly taken out as a resistance value. Not only can be simplified, but also the size and cost can be reduced.

In this embodiment, the upper and lower cases 1
Since the pressure contact portions 25 and 39 are crushed when the 0 and 30 are joined, the positioning of the substrate 90 with respect to the upper and lower cases 10 and 30 is accurately performed without play, and the slider 70
The precision of the sliding contact position with the conductive patterns 91 and 93 is good.
Therefore, even if the length of the conductive patterns 91 and 93 is short, an accurate output can be obtained, and the size can be reduced.

In the above embodiment, the slider 70 is bent, one side of which is attached to the rod 50, and the other side is slidably contacted with the conductive patterns 91 and 93 of the substrate 90. Stroke (length) of child 70
, And the size can be reduced accordingly. That is, since the portion of the slider 70 attached to the rod 50 is bent so as not to face the substrate 90, as shown in FIG.
The stroke of the rod 50 can be made longer than in the case where the surface is opposed to the above, and the size can be reduced accordingly.

Since the packing member 100 is provided at the joint between the upper and lower cases 10 and 30, and the elastic member 110 is also provided at the protruding portion of the rod portion 51, the sliding electronic component can be easily provided with a waterproof structure. It does not become too large.

In the above embodiment, the upper and lower cases 10, 3
The positioning of the substrate 90 in the up-down direction is performed by the press-contact portions 25 and 39 provided in both of them. However, the press-contact portion may be provided in only one of the upper and lower cases 10 and 30.

In the above embodiment, the pressure contact portions 25, 29, 39
The position of the substrate 90 was determined by the above. Instead of the press contact portions 39 (25, 29) having such a shape, as shown in FIG. The pressure contact portions 39 'having a force may be used (the same applies to 25 and 29), and the pressure contact portions 25, 29,
39 may be configured by bonding a rubber material. In short, it is sufficient that the pressure contact portion has a structure in which the substrate is pressed when the upper and lower cases are joined.

[0031]

As described in detail above, the present invention has the following excellent effects. The structure is simple, miniaturization and cost reduction can be achieved.

When the substrate is configured so as to press the pressure contact portion (crushed portion) when the upper and lower cases are integrally joined, the vertical positioning of the substrate with respect to the upper and lower cases is accurately performed without play, and the output accuracy is improved. Get better. Therefore, an accurate output can be obtained even if the length of the conductive pattern is short, and the size can be reduced.

Since the portion of the slider to be attached to the rod is bent so as not to face the substrate, one side is attached to the rod, and the other side is brought into sliding contact with the conductive pattern on the substrate. Accordingly, the stroke of the rod can be lengthened accordingly, and from this point, the size of the position detecting electronic component can be reduced.

One end side of the resilient member is inserted into the resilient means accommodating portion provided on the rod, and the resilient member is installed so that the surface of the substrate on which the conductive pattern is provided is parallel to the moving direction of the rod. The size of the electronic component for position detection can be reduced.

[Brief description of the drawings]

1A and 1B are views showing a position detection electronic component according to an embodiment of the present invention, wherein FIG. 1A is a schematic side sectional view, and FIG. It is the back view seen from.

FIGS. 2A and 2B are views showing a lower case 30. FIG. 2A is a plan view, and FIG. 2B is a sectional view taken along the line BB in FIG. 2A.

3A and 3B are views showing an upper case 10, wherein FIG. 3A is a rear view, FIG. 3B is a cross-sectional view taken along line CC of FIG. 3A, and FIG. FIG.

4A and 4B are views showing a rod 50, FIG. 4A is a side view, and FIG. 4B is a plan view.

FIG. 5 is a view showing a substrate 90.

FIG. 6 is a view showing another example of the electronic component for position detection.

FIG. 7 is a view showing the structure of another press contact portion 39 '.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Upper case 19 Opening 25 Pressure contact part (crushed part) 30 Lower case 39 Pressure contact part (crushed part) 50 Rod 70 Slider 80 Resilient means 90 Substrate 91 Resistor pattern (conductive pattern) 93 Conductor pattern (conductive pattern) 100 Packing member 110 Elastic member

Claims (6)

[Claims] 1. A rod having a tip abutting on a member to be detected, a slider attached to the rod, a substrate provided with a conductive pattern on which the slider slidably contacts, and a tip of the rod being externally mounted. An electronic component for position detection, comprising: a resilient means for urging the rod to protrude, and a case for accommodating the substrate with the end of the rod protruding outside, wherein the case comprises upper and lower cases. The board is housed vertically in the upper and lower cases, and the board is housed in at least one of the upper and lower parts of the upper and lower cases where the upper and lower parts of the board contact. An electronic component for position detection, characterized in that a press-contact portion against which a substrate is pressed when joining is provided. 2. A waterproof structure in which a packing member is sandwiched between joining surfaces of the upper and lower cases to provide a waterproof structure, and an elastic member is also attached to a portion of the upper case where the rod protrudes. The electronic component for position detection according to claim 1. 3. A rod having a tip abutting on a member to be detected, a slider attached to the rod, a substrate provided with a conductive pattern with which the slider slidably contacts, and a tip of the rod being externally mounted. In a position detecting electronic component comprising: a resilient means for urging the rod to protrude, and a case for accommodating the substrate with the end of the rod protruding to the outside, the slider comprises: An electronic component for position detection, wherein a part to be attached to the rod is bent so as not to face the substrate. 4. A rod having a tip abutting on a member to be detected, a slider attached to the rod, a substrate provided with a conductive pattern with which the slider slidably contacts, and In a position detecting electronic component comprising: a resilient means for urging the rod to protrude, and a case for accommodating the substrate with the rod end protruding outside, the resilient member is One end side is inserted into a resilient means accommodating portion provided on the rod, and the substrate is provided so that a surface on which the conductive pattern is provided is parallel to a moving direction of the rod. Electronic components. 5. The electronic component for position detection according to claim 4, wherein a guide mechanism comprising a groove and a projection extending in the direction of movement of the rod is provided between the rod and the case. 6. The position-detecting electronic component according to claim 5, wherein the guide mechanism is provided at a plurality of locations on the outer periphery of the rod so as to stably hold the rod.