JP2581409Y2 - Rotary sensor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary type sensor which is required to have both tightness and strength, such as a vehicle height sensor for a vehicle.

[0002]

2. Description of the Related Art Rotary sensors are used in various fields. For example, in a vehicle, a throttle position is set in order to set an optimum fuel supply amount in accordance with the running speed and to run the vehicle in an optimum fuel economy state. It is used as a sill sensor.

In this sensor, a slider receiver having a slider attached to an operation shaft that rotates in accordance with the operation amount of an accelerator pedal is connected so as to rotate integrally therewith, and a resistor and a collector are provided on the surface. A ceramic substrate on which an electric body is formed is opposed to the slider receiver, and the slider is brought into sliding contact with the resistor and the current collector to thereby reduce the amount of rotation of the operating shaft by the accelerator pedal. The change is taken out as a change in the resistance value.
And, in order to assemble each member constituting the throttle position sensor, such as the slider receiver and the substrate, into the frame, an opening for assembling is provided on one side of a storage portion of these members in the frame. Is formed. Then, after assembling each member through the opening, the opening is filled with a thermosetting resin to keep the inside of the frame tightly closed.

[0004]

In the above-described rotation sensor, the position accuracy of the substrate with respect to the frame is important for the linearity characteristic of the resistance value of the sensor itself. Although the board was firmly fitted to the frame, in this case, there is a problem that the board is cracked because the board is made of ceramic and has no plastic deformation.
In the case of the throttle position sensor, it is usually stored in the bonnet of the car, so there is no worry that the frame will be destroyed by pebbles etc while driving, but with the height sensor it is attached to the outside of the car body Therefore, there is a problem that pebbles and the like may be broken by hitting the frame during traveling, and when the thermosetting resin is filled in the opening of the frame to keep the inside of the frame sealed, the resin may be damaged. When heated to cure, the temperature rises in the storage section inside the frame, the internal pressure rises, and pores are generated in the resin that is in a fluid state before curing, which eventually makes it impossible to have a sealed structure There was a problem.

The present invention is intended to solve the above-mentioned conventional problems, and an object of the present invention is to firmly mount a ceramic substrate on a frame with a high degree of positional accuracy without breaking it. Accordingly, the linearity characteristic of the resistance value of the sensor can be maintained with high accuracy, and the frame body does not break even if pebbles or the like are hit during traveling, and the frame can be kept in a sealed state. It is intended to provide a rotary sensor.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a bearing holder, a metal frame made of a cylindrical body having an open end, and a tip end rotatably supported by the bearing holder of the frame. An operating shaft extending into the cylindrical body of the frame, a slider receiver attached to the operating shaft and having a slider that rotates in accordance with the operating shaft, and a cylindrical portion; Inside
Mounting fitted a board in, and an insulating lid having a buffering property having a plurality of through-holes in the bottom surface of the cylindrical portion, wherein said lid is fitted to the substrate A conductive pattern formed on one surface of the substrate by being fitted to the cylindrical body of the frame is opposed to the slider receiver, and is bonded between the inner wall of the cylindrical body of the frame and the bottom surface of the lid. The adhesive is used to seal the cylindrical portion of the frame with this adhesive, and the adhesive is also filled into the through hole provided on the bottom surface of the lid, and the bottom surface of the lid and the substrate are filled with the adhesive. This is achieved by means of bonding one side to the other.

[0007]

According to the above structure of the present invention, the mounting of the frame of the substrate is performed by firmly fitting the lid to the cylindrical body of the frame in a state where the substrate is fitted and fixed to the lid. Often, at this time, the lid acts as a buffer member for the substrate, so that the substrate can be attached to the cylindrical body of the frame while maintaining a high degree of positional accuracy without cracking the substrate, and the substrate is formed of the lid. Since the substrate is fixed to the lid via the adhesive filled in the through hole provided on the bottom surface, the mounting strength of the substrate to the frame is large. Further, the adhesive is filled between the inner wall of the cylindrical body of the frame and the bottom surface of the lid at room temperature and does not generate pores, so that a highly sealed state can be maintained.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 to FIG. 5 are explanatory views of an embodiment of the present invention.
FIG. 1 is a sectional view of a principal part of an embodiment of a rotary sensor, FIG. 2 is an exploded perspective view showing a state where a lid is fitted to a frame, and FIG. 3 is an exploded perspective view showing a state where a substrate is attached to the lid. FIG. 4 is a sectional view of a principal part of another embodiment of the rotary sensor, and FIG. 5 is a sectional view of a principal part of still another embodiment of the rotary sensor.

In FIG. 1, reference numeral 1 denotes a metal frame constituting a casing of a vehicle height sensor, and the frame 1 is fixedly mounted, for example, outside of an automobile, for example, near wheels. The frame 1 is composed of a bearing holder 2 and a cylindrical body 3, and a storage section 4 for storing each member constituting the rotary variable resistor is formed in the cylindrical body 3. A bearing bush 5 is inserted into the bearing holder 2 of the frame 1. An operation shaft 6 is rotatably inserted into the bearing bush 5, and one end of the operation shaft 6 is connected to the frame 1.
The other end extends into the storage section 4 and is attached so as to be able to rotate integrally with the slider receiver 7. Sliders 8a and 8b are attached to the surface of the slider receiver 7. 9 is a resistance substrate made of ceramics,
On the surface, a pattern of a resistor 10a and a current collector 10b is provided. Reference numeral 11 denotes an insulating material having a buffering property,
The peripheral wall 13 has a pair of convex portions 14 facing inward as shown in FIG.
A plurality of hooks 15 for snapping the substrate 9 are provided on an end surface of the substrate 3, a plurality of through holes 16 to be filled with an adhesive, which will be described later, and both ends of the resistor 10a. An outlet 18 for opening the extraction terminal 17 connected to the electric body 10b to the outside is provided.

As shown in FIG. 3, when the resistance substrate 9 is inserted into the pair of cutouts 9a until the pair of notches 9a come into contact with the bottom surface 12 with the pair of projections 14 of the insulating lid 11 having a cushioning property as guides, One surface of the resistance substrate 9 is snapped at the hooks 15, and the resistance substrate 9 is integrated with the lid 11 while being fitted thereto. Next, as shown in FIG. 2, the lid 11 is provided with a ridge 20 having a concave portion 19 provided on the outer surface of the peripheral wall 13 of the lid 11 on the inner wall of the cylindrical body 3 of the frame 1 with the bottom surface 12 facing upward. For guidance, the end of the peripheral wall 13 is positioned in the storage portion 4 of the cylindrical body 3 so as to abut on the stepped portion 1a provided on the inner wall surface of the frame body 1. On the other hand, the slider receiver 7 is Wave Wash 21
As a result, the respective sliders 8a and 8b are respectively connected to the resistor 10a,
It is urged in the direction in which it comes into contact with the current collector 10b, so that the sliders 8a, 8b and the resistor 10a and the current collector 10b are slid in good contact with each other.

In the drawing, reference numeral 22 denotes an adhesive. The adhesive 22 is filled between the inner wall surfaces of the cylindrical body 3 of the frame 1 so as to cover the bottom surface 12 of the lid 11 so that the bottom surface 12 of the lid 11 is The space between the inner wall surface of the tubular body 3 and the take-out terminal 17 is protected by being buried, and a part of the adhesive 22 is also filled in the through hole 16 in the bottom surface 12 of the lid 11. Then, the resistance substrate 9 is securely fixed to the lid 11 via the adhesive 22.

The take-out terminal 17 is connected to a male connector (not shown) outside the frame 1, and is connected to a female connector provided on the vehicle body. Reference numeral 24 denotes a seal member, and reference numeral 25 denotes a washer for stopping the shaft.

The rotary sensor according to the present invention has the above-described structure, and the frame 1 is formed of metal. They will not be destroyed by hits.

[0015] The resistance board 9 also be made of those which do not plastically deform, such as ceramic for example, insulating slow
When the resistance board 9 is attached to the frame 1, the cover 11 is fitted to the cushioning member of the resistance board 9 because it is fitted to the insulating cover 11 having an impact and is surrounded by an insulator. Therefore, the resistance substrate 9 is not cracked. The resistance substrate 9 is securely fixed to the lid 11 via an adhesive 22 filled in a through hole 16 provided on the bottom surface 12 of the lid 11, and the lid 11 has a concave portion 19 formed in a cylindrical shape. Since it is guided by the ridges 20 provided on the body 3, the accuracy of the mounting position of the resistance board 9 on the cylindrical body 3 can be maintained as high as that of the conventional strong fitting.

Furthermore, since the adhesive 22 is filled into the cylindrical body 3 of the frame 1 at normal temperature, the airtightness is maintained at a high level without generating pores as in the prior art.

As shown in FIG. 4, if the connector 23 is provided integrally with the cover 11 in the extending direction of the extraction terminal 17, connection with the outside is facilitated.

As shown in FIG. 5, the connector 23 is provided integrally with the lid 11 and is surrounded by the metal cylindrical body 3, and the extraction terminal 17 is bent in the middle to project into the connector 23. By doing so, the connector 23 is protected by the metal tubular body 3 and will not be broken even if a pebble or the like hits during traveling.

[0019]

According to the present invention, the inner surface of the cylindrical portion of the lid is provided.
Mounting fitted the board in the lid and take <br/> give structure to the tubular body of the frame, i.e., the cylinder of insulating through the lid board a frame member having a cushioning property The board is framed even though the pure body is made of metal
When fitted to the cylindrical body of the body, the lid serves as a buffer for the substrate
Works and therefore holds the substrate without rattling on the frame
The substrate is not broken even if the
The making it possible to mount the accuracy frame, to achieve a high degree of positional accuracy paired destructive simultaneously can be attached to the frame, it can be maintained Riniaritei characteristics of the resistance value of the product with high precision. Also, the adhesive can be applied to the through holes provided in the frame.
By filling, the substrate on the frame body through the adhesive
Because it will be fixed, cushioning in use conditions
The base is securely held on the frame even if the lid has vibration
Is done. In this way, when mounting, the frame
Positioning with high accuracy, and even in use,
This has the effect that the mounting accuracy is improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a rotary sensor according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a state in which the lid is fitted to the frame of the present invention.

FIG. 3 is an exploded perspective view showing a state in which a substrate is attached to a lid.

FIG. 4 is a sectional view of a main part of another embodiment of the rotary sensor according to the present invention;

FIG. 5 is a cross-sectional view of a main part of still another embodiment of the rotary sensor according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Flange 3 Cylindrical body 6 Operation shaft 7 Slider receiver 8a Slider 8b Slider 9 Substrate 10a Pattern 10b Pattern 11 Lid 12 Bottom surface of lid 16 Through hole 22 Adhesive

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01C 1/02 H01C 10/32

Claims (2)

(57) [Scope of request for utility model registration] 1. A metal frame comprising a bearing holder, a cylindrical body having an open end surface, and a rotatable shaft supported by a bearing holder of the frame body, and a distal end provided in the cylindrical body of the frame body. fitting an operating shaft extending, attached to the operating shaft, a slider receiver fitted with a slider which rotates in accordance with the operating shaft, a cylindrical shape, the board on the inner surface of the tubular portion And a cushioning insulating lid provided with a plurality of through holes on the bottom surface of the cylindrical portion, and the lid fitted with the substrate is attached to the cylindrical body of the frame. The conductive pattern formed on one surface of the substrate is fitted to the slider receiver, and an adhesive is filled between the inner wall of the cylindrical body of the frame and the bottom surface of the lid. The cylindrical body portion of the frame body is sealed with an adhesive, and the adhesive is also filled in a through hole provided on the bottom surface of the lid, and the lid is sealed with the adhesive. A bottom surface of the substrate and one surface of the substrate are adhered to each other. 2. The rotary sensor according to claim 1, wherein a connector is integrally provided on the lid.