JPH11223509A - Rotation throttle position sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assembling performance of a rotation throttle position sensor for detecting the position of the rotation throttle of internal-combustion engine. SOLUTION: By providing at least two projections for hooking that have a hole 44 for inserting the insertion part of a cover insertion jig on the upper surface of a cover 42, it is facilitated to give rotation force to the cover 42 and assembling performance is improved in the constitution. Thereby, by holding the cover insertion jig in the case of rotating the cover 42 and rotating the cover 42, the cover 42 is easily rotated and so a rotation throttle position sensor with good assembling performance can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary throttle position sensor used for detecting the position of a throttle shaft of an internal combustion engine.

[0002]

2. Description of the Related Art An internal combustion engine such as a vehicle uses a throttle valve to control the amount of air flowing into the engine. When the throttle valve is opened, a large amount of air is sucked, and when the throttle valve is closed, a small amount of air is sucked. Thus, the speed of the engine is controlled. The throttle valve is connected to an accelerator pedal, and is controlled to open and close by the amount of depression of the accelerator pedal.

[0003] As a conventional rotary throttle position sensor, one disclosed in Japanese Patent Application Laid-Open No. Hei 7-151508 is known.

Hereinafter, a conventional rotary throttle position sensor will be described with reference to the drawings.

FIG. 13 is a top view showing the internal structure of a conventional rotary throttle position sensor, and FIG. 14 is a sectional view of the rotary throttle position sensor.

In FIGS. 13 and 14, reference numeral 1 denotes a cylindrical case having a bottom. The case 1 has a protruding portion 2 which protrudes inward on a part of the inner surface, and protrudes outward on an outer surface. A connector 4 having a connector terminal 3 on the inside is provided. Reference numeral 5 denotes a resistor base made of a resistor film having a resistor pattern (not shown) provided along the inner side surface of the case 1, and a resistor pattern (not shown) of the resistor base 5 And the connector terminal 3 are electrically connected. Reference numeral 6 denotes a convex-shaped rotor provided so as to come into contact with the projection 2 inside the case 1. The convex-shaped tip 7 of the rotor 6 has a resistance pattern (not shown) of the film resistor base 5 attached thereto. ) Is provided with a brush 8 that slides. Reference numeral 9 denotes a cover for sealing the upper opening of the case 1. The cover 9 has an opening at a position corresponding to the center of the case 1, and the rotor 6 is fitted into the opening 10; 6, a rotary throttle shaft (not shown) is inserted through the inner surface.

Here, suppose a case where a spring (not shown) is placed in the case 1 and the spring (not shown) always applies a biasing force to the rotor 6 in the returning direction. (Not shown), the brush 8 fixed to the rotor 6 must be set at the initial position of the resistor base 5 by locking one end with the rotor 6 and locking the other end with the cover 9. Things.

[0008]

However, in the above conventional configuration, one end of a spring (not shown) is connected to the rotor 6.
And the other end is locked by the cover 9,
In order to apply a biasing force in the return direction to a spring (not shown), it is necessary to assemble while applying a rotating force to the cover 9. In this case, the cover 9 must be rotated while holding the entire cover 9. However, there is a problem that assembly is difficult.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a rotary throttle position sensor which can be easily assembled.

[0010]

In order to achieve the above object, a rotary throttle position sensor according to the present invention has a bottomed cylindrical case provided with a connector having a connector terminal for external connection so as to protrude from an outer peripheral surface. And an electrode provided on a side surface of the inner wall of the case, and electrically connected to the connector terminal, and a resistor base made of a resistor film having a resistor pattern electrically connected to the electrode, A leaf spring that is held in the case and presses the resistor base against the connector terminal, a bottomed tubular portion that slides and rotates on the bottom surface of the inner wall of the case, and an outer surface of the bottomed tubular portion. A rotor having a mounting portion provided so as to protrude outward, and a wall portion provided at an outer peripheral end of the mounting portion and supporting a brush which is in sliding contact with a resistance pattern of the resistor base; At least two latching projections having an opening through which the rotary throttle shaft fitted to the rotor is inserted, and having a hole for inserting the insertion portion of the cover insertion jig are provided on the upper surface, and the lower surface is further provided with a locking projection. A cover having a stopper and sealing an upper opening of the case; and a cover mounted on the upper surface of the mounting portion of the rotor, one end of which is locked to a wall of the rotor, and the other end of which is the cover. And a coil spring that is always locked to the locking portion and constantly applies a biasing force in the return direction to the rotor. According to this configuration, it is possible to provide a rotary throttle position sensor that is easy to assemble. It is.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to a first aspect of the present invention is directed to a bottomed cylindrical case provided with a connector having a connector terminal for external connection so as to protrude from an outer peripheral surface, and an inner wall of the case. And a resistor base formed of a resistor film having an electrode electrically connected to the connector terminal, and a resistor pattern electrically connected to the electrode, and held in the case. And a leaf spring for pressing the resistor base against the connector terminal,
A bottomed cylindrical portion that rotates in sliding contact with the bottom surface of the inner wall of the case, a mounting portion provided to protrude outward from an outer surface of the bottomed cylindrical portion, and a mounting portion provided at an outer peripheral end of the mounting portion; And
And a rotor having a wall for supporting a brush that is in sliding contact with the resistance pattern of the resistor base; and an opening for inserting a rotary throttle shaft fitted to the rotor. A cover for providing at least two hooking projections having holes for inserting a hole, a cover having a locking portion on a lower surface, and sealing an open portion of an upper surface of the case; and an upper surface of a mounting portion of the rotor. And a coil spring that has one end locked to a wall of the rotor and the other end locked to a locking portion of the cover to constantly apply a biasing force to the rotor in a return direction. According to this configuration, at least two locking projections each having a hole for inserting the insertion portion of the cover insertion jig are provided on the upper surface of the cover.
When the cover is rotated to always apply a biasing force in the return direction to the coil spring,
By rotating the cover with the cover insertion jig, the cover can be easily rotated, so that it has an effect of facilitating assembly.

According to a second aspect of the present invention, the leaf spring includes a flat plate portion, a comb-shaped portion provided with a projection for preventing reverse insertion on the upper portion, and a connecting portion connecting the comb-shaped portion and the flat plate portion. According to this configuration, since the protrusion for preventing reverse insertion is provided at the upper portion of the comb-shaped portion, the comb-shaped portion is erroneously located outside and the flat plate portion is located inside when viewed from substantially the center of the inside of the case. When inserted in such a manner, the protrusion for preventing reverse insertion provided on the upper part of the comb-shaped part is caught on the step of the case, so that the leaf spring cannot be inserted into the case. Is prevented from being erroneously inserted into the upside down position.

According to a third aspect of the present invention, the comb-shaped portion of the leaf spring is provided with a contact portion that is located between the projection for preventing reverse insertion and the connecting portion and that contacts the electrode of the resistor base. According to this configuration, when the leaf spring is inserted into the case, the comb-shaped portion is elastically deformed by the case, and the elastically deformed portion of the comb-shaped portion has a contact portion that contacts the electrode of the resistor base. Because of the provision, the cross-sectional area of the elastically deformed portion of each comb-shaped portion becomes the same, and as a result, each comb-shaped portion is uniformly elastically deformed. Has the effect of making the contact pressure of the contact uniform.

According to a fourth aspect of the present invention, the rotor is provided with at least one projection having an insertion inclined surface for inserting and supporting a mating rotary throttle shaft. For example, since the insertion inclined surface is provided on the projection, the insertion inclined surface serves as a guide when the rotary throttle shaft is inserted into the rotor, whereby the rotary throttle shaft is connected to the rotor. It has the effect of being easy to insert into the device.

According to a fifth aspect of the present invention, a mounting portion for connecting the bottomed cylindrical portion and the wall portion and for mounting the coil spring is provided on the rotor over the entire outer surface of the bottomed cylindrical portion. According to this configuration, even if the spring mounted on the mounting portion is inclined, the bottom surface of the coil spring is supported over the entire surface of the mounting portion. Have

According to a sixth aspect of the present invention, there is provided a bottomed cylindrical case having a projecting portion projecting inward on a part of an inner surface thereof, and a tip end surface of the projecting portion and the bottomed cylindrical case. A tapered portion for guiding the insertion of one end in the longitudinal direction of the resistor body is provided at the boundary surface with the inner surface of the resistor body. According to this configuration, when inserting the resistor body from above the case, Since the tapered portion serves as a guide, by inserting the resistor base along the tapered portion, the operation of inserting the resistor base into the case can be easily performed.

According to a seventh aspect of the present invention, a projecting portion projecting inward is formed on a part of the inner surface of the bottomed cylindrical case, and a tip end surface of the projecting portion and the bottomed cylindrical case are formed. The resistor base is disposed on the inner surface of the bottomed cylindrical case such that one end in the longitudinal direction of the resistor base is pressed against the boundary surface with the inner surface of the resistor base, and one end of the resistor base in the longitudinal direction is provided. Because a straight part is provided on the inner surface of the bottomed cylindrical case so that it contacts
According to this configuration, a compressive force is applied by pressing one end of the resistor base in the longitudinal direction against the boundary surface between the distal end surface of the protruding portion and the inner surface of the bottomed cylindrical case along the longitudinal direction. Also in this case, since the resistor base is securely held by the linear portion provided on the inner side surface of the case, the resistor base does not float.

Hereinafter, a rotary throttle position sensor according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of a rotary throttle position sensor according to an embodiment of the present invention. FIG. 2 is a top view showing a state where a cover of the rotary throttle position sensor is removed.
FIG. 3 is a sectional side view of the same.

1 to 3, reference numeral 11 denotes a bottomed cylindrical case formed of a synthetic resin having excellent heat resistance and mechanical strength such as polybutylene terephthalate mixed with glass fibers. A connector terminal 12 for external connection is incorporated by insert molding. One end of the connector terminal 12 is exposed inside the case 11, and the other end protrudes out of a part of the outer peripheral surface of the case 11. The connector 13 protrudes into the connector 13 provided so as to be connected to the connector. A ring-shaped flange 1 is provided on the outer peripheral surface of the case 11.
4 is formed, and a mounting portion 16 having a mounting hole 15 is provided at a part of the flange 14 facing each other.
Further, as shown in FIG. 4, a protruding portion 18 protruding inward is formed on a part of the inner side surface 17 of the case 11,
The distal end face 19 of the protruding portion 18 and the bottomed cylindrical case 1
A tapered portion 21 is provided on a boundary surface 20 between the first inner surface 17 and the first inner surface 17. A first step 17a is provided above the inner surface 17 of the case 11, and a second step 17b is provided below the inner surface 17. Reference numeral 22 denotes a resistor base made of a resin film such as a polyimide film. The resistor base 22 is provided on the inner side surface of the case 11 so as to be placed on the second step 17b of the case 11. Also, on the inner surface of the resistor base 22, there is provided an A for contacting the connector terminal 12 to establish electrical conduction.
g and a phenolic resin, and a resistance pattern 25 made of a mixture of carbon and phenolic resin is printed in the longitudinal direction of the resistor base 22 so as to be electrically connected to the electrode 24. And so on. One end of the resistor base 22 in the longitudinal direction is in contact with the tapered portion 21 of the case 11.

FIG. 5 is a perspective view of a leaf spring which is the main part. In FIG. 5, reference numeral 26 denotes a leaf spring made of stainless steel or the like and formed in a substantially V shape. Numeral 26 is for holding the resistor base 22 in the case 11. The leaf spring 26 is formed in a V-shape by a flat plate portion 27 on one surface, a comb portion 28 on the other surface, and a connecting portion 29 connecting the comb portion 28 and the flat plate portion 27. The connection of the electrode 24 of the resistor base 22 to the connector terminal 12 is achieved by incorporating the leaf spring 26 into the electrode 24 and pressing the electrode 24 against an exposed portion (not shown) inside the case 11 of the connector terminal 12. Is being done. A protrusion 30 for preventing reverse insertion of the leaf spring 26 into the case 11 is provided at an upper end of the comb-shaped portion 28 of the leaf spring 26 so as to project to the side. In the comb-shaped portion 28 of the leaf spring 26, a contact portion 31 which is located between the projection 30 for preventing reverse insertion and the connecting portion 29 and contacts the electrode 24 of the resistor base 22 is drawn. It is formed by. When the leaf spring 26 is inserted into the case 11, the comb-shaped portion 28 is elastically deformed by the case 11. However, since the elastically deformed portion of the comb-shaped portion 28 is not provided with the protrusion 30 for preventing reverse insertion, The cross-sectional area of the elastically deformed portion of each of the comb portions 28 is the same, and as a result, each of the comb portions 28 is uniformly elastically deformed.
Has a function of making the contact pressure between each comb-shaped portion 28 and the electrode 24 of the resistor base 22 uniform.

FIG. 6 is a perspective view of a rotor which is the main part, and FIG.
FIG. 3 is a top view of a rotor as the main part. 6 and 7
In the figure, 32 is a rotor made of a synthetic resin such as polybutyl terephthalate mixed with glass fiber, and this rotor 32 is incorporated in the case 11 and has a cylindrical shape with a bottom and rotates by sliding on the bottom surface of the inner wall of the case 11. A bottom cylinder portion 33;
A mounting portion 35 provided over the entire outer surface of the bottomed cylindrical portion 33 so as to protrude outward from the outer surface 34 of the bottomed cylindrical portion 33, and a bottomed portion is provided on an outer peripheral end of the mounting portion 35. It has a wall portion 36 provided in parallel with the outer surface 34 of the cylindrical portion 33. A triangular projection 39 having an insertion inclined surface 38 is provided on the inner side surface 37 of the bottomed cylindrical portion 33 of the rotor 32, and the triangular projection 39 on the other side is brought into contact with the triangular projection 39. Rotating throttle shaft (not shown)
, The rotating throttle shaft (not shown) is supported by the projection 39. A support portion 40 is provided at the tip of a wall portion 36 of the rotor 32. A brush 41 is attached to the support portion 40 so that the brush 41 Is configured to be in sliding contact with the resistance pattern 25. Further, the resistor base 22 and the leaf spring 2
6. A cover 42 made of a synthetic resin such as polybutyl terephthalate mixed with glass fibers shown in FIG.
Is mounted so as to seal the upper surface open portion of the. A central portion of the cover 42 has an opening 43 through which a rotary throttle shaft (not shown) fitted to the rotor 32 is inserted, and an insertion portion of a cover insertion jig described later is inserted into the upper surface. There are provided two hooking projections 45 having holes 44, and an arc-shaped locking portion 46 projecting downward from the lower surface. 47 has one end locked to the support portion 40 of the rotor 32 and the other end
Is a coil spring that is locked by the locking portion 46 and constantly applies a biasing force to the rotor 32 in the return direction. And
The coil spring 47 is assembled in a state compressed in the thrust direction, and its upper and lower surfaces 48 are
The second mounting portion 35 is in contact with the cover 42. At this time, the coil spring 47 is attached to the mounting portion 3 of the rotor 32.
The mounting portion 35 is provided over the entire outer surface of the bottomed cylindrical portion 33 that constitutes the rotor 32.
Reference numeral 7 indicates that the entire lower surface is supported by the mounting portion 35, thereby having the effect that the coil spring 47 is hardly inclined.

Next, a description will be given of a method of manufacturing the rotary throttle position sensor according to the embodiment of the present invention configured as described above.

First, after three connector terminals 12 are set in a molding die (not shown), a phenol resin such as polybutyl terephthalate melted at about 200 ° C. in a molding die (not shown). And cooled at room temperature to form the case 11.

Next, a film-shaped resistor substrate 2 made of a resin such as polyimide cut to a width of about 70 to 120 mm.
2 is printed with a resistance paste (not shown) containing a binder resin such as polyimide,
Baking for about 120 minutes to form the resistor pattern 25
Bake on 2.

Next, a silver paste (not shown) containing a binder resin such as polyimide is printed on the resistor substrate 22 on which the resistor pattern 25 is provided.
For about 1 to 120 minutes, and the electrode 24 is
Bake.

Next, an exposed portion (not shown) of the connector terminal 12 of the case 11 exposed inside the case 11.
And the electrode 24 provided on the inner surface of the resistor base 22, and at the same time, the boundary surface 20 provided on the case 11 and one end in the longitudinal direction of the resistor base 22 contact each other.
Is inserted from above the case 11 while using the tapered portion 21 provided on the boundary surface 20 of the case 11 as a guide surface. At this time, since the tapered portion 21 serves as a guide, the operation of inserting the resistor substrate 22 into the case 11 can be easily performed by inserting the resistor substrate 22 along the tapered portion 21. is there.

Next, the leaf spring 26 is inserted into the case 11 from above so that the contact portion 31 of the leaf spring 26 and the electrode 24 of the resistor body 22 are pressed and electrically connected. . At this time, the comb-shaped portion 28 of the leaf spring 26 is
The connector terminal 12 is inserted so as to be disposed on a side of an exposed portion exposed inside the case 11 in this case. In this case, a projection 30 for preventing reverse insertion is provided on the upper part of the comb-shaped portion 28.
Is provided, as shown in FIG.
8 is inserted outside the case 11 when viewed from substantially the center of the case 11 and the flat plate portion 27 is positioned inside the case 11, the projection 30 for preventing reverse insertion provided on the upper portion of the comb-shaped portion 28 is provided. And the leaf spring 26 cannot be inserted into the case 11 by being hooked on the first step portion 17a. Therefore, the comb-shaped portion 28 and the flat plate portion 27 of the leaf spring 26 are not erroneously inserted into the upside down position. Things.

Next, a rotor 32 to which a brush 41 is fixed in advance to a support portion 40 is mounted from above on the inside of the case 11 provided with the resistor base 22 and the leaf spring 26.

Next, the rotor 32 mounted on the case 11
The coil spring 47 is mounted on the mounting portion 35 of the above.

Next, as shown in FIG. 9, one end of the upper surface of the coil spring 47 is locked to the locking portion 46 of the cover 42, and a locking projection 45 provided on the upper surface of the cover 42 is formed. Insertion portion 50 of cover insertion jig 49 into hole 44
Is inserted, and the upper opening of the case 11 is closed by the cover 42 while applying a rotational force to the cover insertion jig 49. In this case, the cover 42 has an insertion portion 5 of a cover insertion jig 49.
Since two hooking projections 45 having holes 44 for inserting 0 are provided, when the cover 42 is rotated in order to always apply a biasing force to the coil spring 47 in the returning direction, By rotating the cover 42 with the cover insertion jig 49, the cover 42 can be easily rotated, so that assembly can be easily performed.

Next, the operation of the rotary throttle position sensor constructed and assembled as described above will be described.

As shown in FIG. 10, the rotor 32 of the rotary throttle position sensor is press-fitted into the rotary throttle shaft 51 near the internal combustion engine while being aligned, and the rotary throttle shaft 51 is completely fitted to the rotor 32. In this state, the case 11 is fixed to a throttle body (not shown) using the mounting portion 16 of the case 11 to complete the installation. At this time, the triangular protrusion 39 provided on the rotor 32 is provided with the insertion inclined surface 38, so that when the rotary throttle shaft 51 is inserted into the rotor 32, the insertion inclined surface 38 is guided. Accordingly, the rotation throttle shaft 51 can be easily inserted into the rotor 32.

The rotary throttle shaft 51
Is rotated by depressing or releasing the accelerator, and the rotor 32 rotates in synchronization with this rotation, and the brush 41 attached to the rotor 32 changes the contact position with the resistance pattern 25 of the resistor base 22. As a result, an output voltage corresponding to the contact position is obtained at the connector terminal 12, and the amount of fuel injected into the engine can be controlled using the fluctuation of the output voltage as a signal.

In the rotary throttle position sensor according to one embodiment of the present invention, a projecting portion 18 projecting inward is formed on a part of the inner surface 17 of the case 11.
The boundary surface 2 between the distal end surface 19 of the protruding portion 18 and the inner surface 17 which is arc-shaped over the entire case 11
Although the configuration in which the tapered portion 21 for guiding the insertion of one end in the longitudinal direction of the resistor base 22 is provided at the position 0 is described, as shown in FIG. A projecting portion 18 is formed, and one end in the longitudinal direction of the resistor base 22 is pressed against a boundary surface 20 between a tip end surface 19 of the projecting portion 18 and an inner surface 17 of the bottomed cylindrical case 11. The resistor base 22 is disposed on the inner surface 17 of the bottomed cylindrical case 11, and the bottomed cylindrical case 11 is in contact with one longitudinal end of the resistor base 22.
It is good also as a structure which provided the linear part 52 in the inner side surface 17 of this. In this case, as in the former case, the resistor substrate 2
Inner side surface 1 of case 11 abutting on one end in the longitudinal direction 2
7 is an arc, the tapered portion 21 of the case 11
When a compressive force in the longitudinal direction of the resistor base 22 is applied to the resistor base 22, the resistor base 22 may rise from the inner surface 17 of the case 11 as shown in FIG. 11. When the brush 41 slides on the resistance pattern 25 in a state where the resistor base 22 is lifted from the inner side surface 17 of the case 11, the output characteristics are not stable.

In the structure shown in FIG. 12, however, the resistor base 22 is provided on the boundary surface 20 between the tip end surface 19 of the projecting portion 18 of the case 11 and the inner surface of the bottomed cylindrical case 11.
Even when a compressive force is applied by pressing one end in the longitudinal direction along the longitudinal direction, the resistor base 22 is securely held by the linear portion 52 provided on the inner side surface 17 of the case 11. Therefore, the resistor base 22 does not float.

[0037]

As described above, the rotary throttle position sensor of the present invention has a bottomed cylindrical case provided with a connector having a connector terminal for external connection so as to protrude from the outer peripheral surface, and an inner wall of the case. A resistor base formed of a resistor film having an electrode provided on a side surface and electrically connected to the connector terminal, and a resistor pattern electrically connected to the electrode, and held in the case. A leaf spring that presses the resistor base against the connector terminal, a bottomed cylindrical portion that slides on the bottom surface of the inner wall of the case and rotates, and protrudes outward from an outer surface of the bottomed cylindrical portion. A rotor having a mounting portion provided thereon, a wall portion provided at an outer peripheral end of the mounting portion and supporting a brush which is in sliding contact with the resistance pattern of the resistor base, and a rotating slot fitted to the rotor; A case having an opening through which the torsion shaft is inserted, at least two hooking projections having holes for inserting an insertion portion of the cover insertion jig on the upper surface, and further having a locking portion on the lower surface; A cover for sealing the upper opening of the rotor, and a cover mounted on the upper surface of the mounting portion of the rotor, one end of which is locked to the wall of the rotor, and the other end of which is locked to the locking portion of the cover. And a coil spring for constantly applying a biasing force in the return direction to the rotor. According to this configuration, the latching projection having a hole for inserting the insertion portion of the cover insertion jig is provided on the upper surface of the cover. Since at least two are provided, when the cover is rotated in order to always apply a biasing force in the returning direction to the coil spring, the cover is easily rotated by rotating the cover with the cover insertion jig. Let Since it is collected by, and has the effect that it is possible to provide a rotary throttle position sensor of assembly.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a rotary throttle position sensor according to an embodiment of the present invention.

FIG. 2 is a top view showing a state where a cover of the rotary throttle position sensor is removed.

FIG. 3 is a side sectional view of the sensor.

FIG. 4 is a perspective view showing an internal configuration of a case in the sensor.

FIG. 5 is a perspective view of a leaf spring in the sensor.

FIG. 6 is a perspective view of a rotor in the sensor.

FIG. 7 is a top view of the rotor.

FIG. 8 is a perspective view showing a state in which a leaf spring is reversely inserted into a case in the sensor.

FIG. 9 is an exploded perspective view showing a state in which the cover of the sensor is assembled with a cover insertion jig.

FIG. 10 is an exploded perspective view showing a state in which the rotary throttle shaft is inserted along the inclined surface for inserting the rotor in the sensor.

FIG. 11 is a perspective view showing a state in which a resistor body is lifted from an inner surface of a case by applying a compressive force in a longitudinal direction of the resistor body in the sensor.

FIG. 12 is a perspective view showing a part of a case of the rotary throttle position sensor according to the embodiment of the present invention.

FIG. 13 is a top view showing the internal structure of a conventional rotary throttle position sensor.

FIG. 14 is a sectional view of the rotary throttle position sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Case 12 Connector terminal 18 Projection part 20 Boundary surface 21 Taper part 22 Resistor base 24 Electrode 25 Resistance pattern 26 Leaf spring 27 Flat part 28 Comb part 29 Connection part 30 Reverse insertion prevention projection 31 Contact part 32 Rotor 33 Existence Bottom tube part 35 Placement part 36 Wall part 38 Slope for insertion 39 Projection 41 Brush 42 Cover 43 Opening 44 Hole 45 Hook projection 46 Locking part 47 Coil spring 49 Cover insertion jig 51 Rotary throttle shaft

Claims (7)

[Claims] 1. A bottomed cylindrical case provided with a connector having an external connection connector terminal protruding from an outer peripheral surface, and provided on a side surface of an inner wall of the case and electrically connected to the connector terminal. A resistor base made of a resistor film having an electrode to be connected and a resistance pattern electrically connected to the electrode, and a plate held in the case and pressing the resistor base against the connector terminal A spring, a bottomed cylindrical portion that rotates in sliding contact with the bottom surface of the inner wall of the case, a mounting portion provided to protrude outward from an outer surface of the bottomed cylindrical portion, and an outer periphery of the mounting portion A rotor provided at one end and having a wall for supporting a brush that is in sliding contact with the resistance pattern of the resistor body; and an opening through which a rotary throttle shaft fitted to the rotor is inserted. A cover provided with at least two hooking projections having holes for inserting an insertion portion of the insertion jig, further having a locking portion on a lower surface, and sealing an upper opening portion of the case; A coil that is mounted on the upper surface of the mounting portion, one end of which is locked to the wall of the rotor, and the other end of which is locked to the locking portion of the cover to constantly apply a biasing force to the rotor in the returning direction. Rotary throttle position sensor with spring. 2. The rotary throttle according to claim 1, wherein the leaf spring comprises a flat plate portion, a comb-shaped portion provided with a projection for preventing reverse insertion on the upper portion, and a connecting portion connecting the comb-shaped portion and the flat plate portion. Position sensor. 3. The rotary throttle according to claim 2, wherein a contact portion is provided on the comb-shaped portion of the leaf spring between the projection for preventing reverse insertion and the connecting portion and in contact with the electrode of the resistor base. Position sensor. 4. The rotary throttle position sensor according to claim 1, wherein the rotor is provided with at least one protrusion having an insertion inclined surface for inserting and supporting a counterpart rotary throttle shaft. 5. The rotation according to claim 1, wherein the rotor is connected to the bottomed cylindrical portion and the wall portion, and a mounting portion on which the coil spring is mounted is provided over the entire outer surface of the bottomed cylindrical portion. Throttle position sensor. 6. A protruding portion that protrudes inward on a part of the inner surface of the bottomed cylindrical case, and a boundary surface between a tip surface of the protruding portion and the inner surface of the bottomed cylindrical case. 2. The rotary throttle position sensor according to claim 1, further comprising a tapered portion for guiding insertion of one end of the resistor base in the longitudinal direction. 7. A protruding portion that protrudes inward on a part of the inner surface of the bottomed cylindrical case, and a boundary surface between a tip end surface of the protruding portion and the inner surface of the bottomed cylindrical case. The resistor base is disposed on the inner surface of the bottomed cylindrical case so as to press one end of the resistor base in the longitudinal direction, and the bottomed cylinder is in contact with one end of the resistor base in the longitudinal direction. The rotary throttle position sensor according to claim 1, wherein a linear portion is provided on an inner surface of the case.