JPH11337429A - Apparatus and method for inspection of rotating operation-type electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating operation-type electronic component whose rotating load is detected surely, which is quick and whose error is small regarding an apparatus and a method for the inspection of the rotating operation-type electronic component which is used for various electronic apparatuses. SOLUTION: A rotating operation-type electronic component 1 is placed on a mounting plate 12 by keeping a gap in a direction perpendicular to a shaft 1A. A drum 14 in which a chuck 13 is housed in the central part so as to be freely rotatable is turned. An arm 17 which protrudes from the outer circumference of the chuck 13 is pressed at the free end of a plate 15 on which a strain gage 16 is pasted in the intermediate part and one end of which is fixed to the outer circumference of the drum 14. The shaft 1A is turned and operated by the chuck 13. On the basis of a change in the resistance value of the strain gage 16 due to the flexure of the plate 15 at this time, the rotating load of the shaft 1A is detected continuously. Thereby, it is possible to obtain an apparatus and a method for the detection of the rotating operation-type electronic component 1 whose rotating load is judged surely, which is guick and whose error is small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection apparatus and an inspection method for rotary operation type electronic components such as switches, variable resistors, and encoders used in various electronic devices.

[0002]

2. Description of the Related Art In recent years, as various electronic devices such as communication devices, video devices, and audio devices have become more sophisticated and diversified, rotary operation electronic components such as switches, variable resistors, and encoders used in these devices have been developed. Also, those provided with various operation forms and operation feelings have come to be used.

A conventional apparatus and method for inspecting a rotary operation type electronic component will be described with reference to FIGS.

FIG. 5 is a sectional view showing an outline of a conventional rotary operation type electronic component inspection apparatus, and FIG. 6 is an exploded perspective view of the inspection apparatus. In the figure, reference numeral 1 denotes a rotary operation of a switch, a variable resistor, an encoder and the like. The electronic component 2 is a mounting plate, and the rotary operation type electronic component 1 has a rotating shaft 1A protruding downward from a through hole 2A at the center of the mounting plate 2 and mounting holes 1B and 1C on the left and right sides of the upper surface of the mounting plate 2. The protruding pins 2B and 2C are inserted and mounted on the mounting plate 2.

Reference numeral 3 denotes a rotary operation type electronic component 1 at the upper end.
Is a drum having a coil spring-like universal joint 5 mounted between the upper end and the chuck 3, and the lower end of the drum 4 is fixed to a torque gauge 6 for detecting a rotational load. , The torque gauge 6 is electrically connected to an inspection circuit (not shown) of the inspection device by a lead wire or the like.

In the above configuration, when the torque cage 6 is rotated, the chuck 3 rotates the rotary shaft 1A of the rotary operation type electronic component 1, and the rotary shaft 1A transmitted through the drum 4 is rotated.
Is detected by the torque gauge 6 and its signal is transmitted to the inspection circuit. From this signal, the inspection circuit detects the rotation load of the rotary operation type electronic component 1 and compares it with a preset reference value. The determination was made as to whether the rotation load was within the reference value.

[0007] Then, as shown in FIG. 7, the finished dimensions and assembly variations of the components of the rotary operation type electronic component 1 or the mounting holes 1 B and 1 C and the projecting pins 2 of the mounting plate 2.
Actually, a certain amount of center shift occurs between the rotary shaft 1A and the drum 4 or the torque gauge 6 due to a position shift between the shafts B and 2C. In this case, the coil spring-like universal joint 5 is bent. Thus, the eccentricity is absorbed, so that the chuck 3 can connect and hold the center of the rotating shaft 1A.

[0008]

However, in the conventional inspection apparatus and inspection method for a rotary operation type electronic component, the center of the rotary shaft 1A or the chuck 3 of the rotary operation type electronic component 1 and the rotational load of the rotary shaft 1A are required. Since the inspection is performed in a state where a certain degree of eccentricity has occurred in the center of the torque gauge 6 and the drum 4 for detecting the rotational load, the rotational load having a waveform as shown in FIG. As shown in FIG. 8 (b), the entire waveform is detected as having an undulation, and it is necessary for the inspection circuit to set a large range of preparatory values for judging pass / fail. There was a problem that it would be.

In addition, inertia is generated in the chuck 3 with respect to the torque gauge 6 and the drum 4 by the universal joint 5 during rotation,
As the rotation of the torque gauge 6 increases, the swell of the waveform of the rotational load increases due to the inertia. Therefore, it is necessary to perform the inspection with the rotation reduced to some extent, and there is also a problem that the inspection requires time.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an inspection apparatus and an inspection method for a rotary operation type electronic component which can reliably detect a rotational load, and have a quick and small error. And

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a rotary operation type electronic component inspection apparatus and inspection method according to the present invention mounts a rotary operation type electronic component with a gap in a direction perpendicular to a rotation axis. Rotate the drum with the chuck mounted rotatably in the center and attach the strain gauge to the middle part, one end of the elastic plate fixed to the drum outer periphery, protruding from the chuck outer periphery Pressed arm
The rotary shaft of the rotary operation type electronic component connected and held by the chuck is rotated, and the rotational load of the rotary shaft is continuously detected and determined based on a change in the resistance value of the strain gauge due to the bending of the plate at this time. .

[0012] This makes it possible to reliably detect the rotational load and to obtain an inspection apparatus and an inspection method for a rotary operation type electronic component that are quick and have few errors.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention provides a mounting plate for mounting a rotary operation type electronic component having a rotation axis with a gap in a direction perpendicular to the rotation axis, and a rotation operation type electronic component. A chuck that connects and holds the rotating shaft of the component, a drum in which the chuck is rotatably mounted at the center, and a strain gauge whose resistance value changes due to bending attached to the middle part, and has one end fixed to the outer periphery of the drum A plate and an arm projecting from the outer periphery of the chuck and abutting against a free end of the plate;
It is a device for inspecting rotary operation type electronic components consisting of an inspection circuit connected to a strain gauge.Since the rotary operation type electronic components are mounted on a mounting plate with a gap in the direction perpendicular to the rotation axis, When the chuck connects and holds the rotary shaft, the rotary operation type electronic component moves by the amount of this gap, and the rotary operation type electronic component can be held in a state where the center of the chuck and the rotary shaft are aligned, and the rotary shaft can be held. The chuck for connecting and holding the drum is rotatably mounted on the center of the drum, and the drum and the chuck are configured to rotate integrally via a plate to which a strain gauge is attached, and the center of each component is aligned Inspection can be performed at high speed, so a stable waveform without swelling can be obtained by increasing the rotation speed, and the rotation load can be detected reliably. An effect that can be obtained an inspection apparatus of the child component.

According to a second aspect of the present invention, in the first aspect of the present invention, two protruding arms are provided on the outer periphery of the chuck, and the free end of the plate is sandwiched between the two arms. By sandwiching the plate with the affixed, it is possible to rotate the rotary operation type electronic component in both left and right directions and detect the rotational load in both directions,
This has the effect that a more accurate inspection can be performed.

According to a third aspect of the present invention, a rotary operation type electronic component having a rotary shaft is mounted on a mounting plate with a gap in a direction perpendicular to the rotary shaft, and a chuck is rotatably mounted at a central portion. Rotating the drum, pressing the arm protruding from the outer periphery of the chuck with the free end of a plate having elasticity with one end fixed to the outer periphery of the drum with a strain gauge attached to the middle part, and connected to and held by the chuck In addition to rotating the rotating shaft of the component, the change in the resistance value of the strain gauge due to the bending of the plate at this time is a method for inspecting rotating operation type electronic components that continuously detects and determines the rotating load of the rotating shaft. There is an effect that the rotational load can be reliably detected, and a method for inspecting the rotary operation type electronic component quickly and with little error can be obtained.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The same components as those described in the section of the related art are denoted by the same reference numerals, and detailed description will be omitted.

(Embodiment) FIG. 1 is a sectional view showing an outline of a rotary operation type electronic component inspection apparatus according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. A rotary operation type electronic component such as a switch, a variable resistor, an encoder, etc., 12 is a mounting plate, and a rotating shaft 1A of the rotary operation type electronic component 1 protrudes downward from a through hole 12A at the center of the mounting plate 12, and has a left and right side. The rotation operation type electronic component 1 is mounted on the mounting plate 12 by inserting the protruding pins 12B, 12C on the upper surface of the mounting plate 12 into the mounting holes 1B, 1C as in the case of the prior art. Pins 12B, 12C
Is inclined from the base portion having an outer diameter slightly smaller than the mounting holes 1B and 1C of the rotary operation type electronic component 1, and the tip portion at the upper end has a smaller outer diameter and rotates between the mounting holes 1B and 1C. A gap is provided in a direction perpendicular to the axis 1A.

Reference numeral 13 denotes a chuck having an upper end to which the rotary shaft 1A of the rotary operation type electronic component 1 is connected and held, 14 denotes a drum having a chuck 13 rotatably housed and mounted on the inner periphery of the center via a bearing or the like, and 15 denotes an intermediate member. An elastic plate, such as a thin metal plate, on which a strain gauge 16 whose resistance value changes due to bending is attached to the lower part of the drum 1.
4 The upper end which is fixed to the outer periphery and becomes a free end is the chuck 13
The strain gauge 16 is electrically connected to an inspection circuit (not shown) of the inspection device by a lead wire or the like while being in contact with an arm 17 protruding from the outer periphery.

In the above arrangement, when the drum 14 is rotated by an external force such as a motor, the lower end of the drum 1 is rotated.
4, the free end of the plate 15 fixed to the outer periphery presses the arm 17 protruding from the outer periphery of the chuck 13, so that the chuck 13 rotates to rotate the rotary shaft 1A of the rotary operation type electronic component 1.
Is rotated, and the plate 1 is pressed against the arm 17.
5 is bent by the rotation load of the rotary operation type electronic component 1, so that the strain gauge 16 attached to the plate 15 also bends,
The changed resistance value is continuously transmitted to the inspection circuit. From this signal, the inspection circuit detects the rotational load of the rotary operation type electronic component 1 and compares it with a preset reference value. It is determined whether it is within or not.

Here, the rotating shaft 1 may vary depending on the finished dimensions of the components of the rotating operation type electronic component 1 and variations in assembly.
A description will be given of a method of mounting on the mounting plate 12 when the center shift occurs at A. First, as shown in FIG. 3A, the rotary operation type electronic component 1 is lightly pushed from above and placed on the mounting plate 12. In the state, the protruding pins 12B on the upper surface of the mounting plate 12,
Since the root of 12C is inserted into the mounting holes 1B and 1C, the center of the rotating shaft 1A is eccentric with respect to the centers of the mounting plate 12 and the chuck 13.

Thereafter, when the chuck 13 rises from below and comes into contact with the lower end of the rotary shaft 1A, as shown in FIG. 3B, the rotary operation type electronic component 1 pressed on the rotary shaft 1A moves upward. The lower end of the rotary shaft 1A moves on the inclined surface of the inner circumference of the holding hole 13A of the chuck 13, and the inner circumference of the mounting holes 1B and 1C
B and 12C are respectively slid, and the rotary operation type electronic component 1 is moved leftward by the gap between the protruding pins 12B and 12C and the mounting holes 1B and 1C. In this state, the rotary shaft 1A is connected and held by the chuck 13.

As described above, according to the present embodiment, the rotary operation type electronic component 1 is provided with a gap in the direction perpendicular to the rotation axis 1A.
Is mounted on the mounting plate 12, so that when the chuck 13 connects and holds the rotary shaft 1A, the rotary operation-type electronic component 1 moves by an amount corresponding to this gap, and the center of the chuck 13 and the rotary shaft 1A are aligned. Can be held and the rotating shaft 1
A chuck 13 for connecting and holding A is rotatably housed and mounted at the center of the drum 14, and the drum 14 and the chuck 13 are configured to rotate integrally via a plate 15 on which a strain gauge 16 is attached. Since the inspection can be performed in a state in which the centers of the component parts are coincident with each other, there is no undulation due to a measurement error, and the stability according to the rotational load of the actual rotary operation type electronic component 1 as shown in FIG. In addition to the above, a rotating load can be detected with high accuracy by reducing the range of the reference value set in the inspection circuit, the inspection speed is increased, and the inspection device and the inspection method of the rotary operation type electronic component with less errors are provided. What you can get.

As shown in FIG. 4, two protruding arms 17A and 17B are provided on the outer periphery of the chuck 13, and the upper end which is the free end of the plate 15 on which the strain gauge 16 is stuck is sandwiched between the arms 17A and 17B to rotate the arm. Since the operation type electronic component 1 is rotated in both the left and right directions to detect the rotational load in both directions, a more accurate inspection can be performed.

In the above description, the projecting pins 12B, 12C of the mounting plate 12 are inserted into the mounting holes 1B, 1C provided in the rotary operation type electronic component 1 with a gap in a direction perpendicular to the rotation axis 1A. Then, the rotating electronic component 1 is attached to the mounting plate 12.
Has been described, but this is the mounting hole 1
In the case of a rotary operation type electronic component provided with a mounting projection instead of B and 1C, a hole is provided on the mounting plate side, and the projection of the rotary operation type electronic component is oriented in a direction perpendicular to the rotation axis. A configuration in which the outer periphery of the rotary operation type electronic component is mounted on a mounting plate in the case of a rotary operation type electronic component which is not provided with a hole or a protrusion for mounting, or is inserted with a gap therebetween. However, it goes without saying that the present invention can be implemented.

[0025]

As described above, according to the present invention, it is possible to obtain an advantageous effect that a rotational load can be reliably detected and an inspection apparatus and an inspection method for a rotationally operated electronic component can be obtained quickly and with little error. Can be

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a rotary operation type electronic component inspection apparatus according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a sectional view of the same.

FIG. 4 is a partial perspective view of the same.

FIG. 5 is a sectional view of a conventional rotary operation type electronic component inspection apparatus.

FIG. 6 is an exploded perspective view of the same.

FIG. 7 is a sectional view of the same.

FIG. 8 is a characteristic diagram of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotation operation type electronic component 1A Rotating shaft 1B, 1C Mounting hole 12 Mounting plate 12A Through hole 12B, 12C Protruding pin 13 Chuck 13A Holding hole 14 Drum 15 Plate 16 Strain gauge 17, 17A, 17B Arm

Claims (3)

[Claims] 1. A mounting plate for mounting a rotary operation type electronic component having a rotation axis with a gap in a direction perpendicular to the rotation axis, a chuck for connecting and holding the rotation axis of the rotary operation type electronic component,
A drum having a chuck rotatably mounted at the center thereof, a plate having elasticity in which a strain gauge whose resistance value changes by bending is attached to an intermediate portion and one end of which is fixed to the outer periphery of the drum, and a free end of the plate protruding from the outer periphery of the chuck. An inspection device for a rotary operation type electronic component, comprising an arm abutting on a member and an inspection circuit connected to a strain gauge. 2. The chuck according to claim 1, wherein two protruding arms are provided on the outer periphery of the chuck, and a free end of the plate is sandwiched between the arms.
Inspection device for rotating electronic parts according to the above. 3. A rotary operation type electronic component having a rotation axis,
The elasticity is attached to the mounting plate with a gap in the direction perpendicular to the rotation axis, and the drum with the chuck rotatably mounted at the center is rotated, a strain gauge is attached to the middle part, and one end is fixed to the outer periphery of the drum The arm protruding from the outer periphery of the chuck is pressed by the free end of the plate having the surface, and the rotating shaft of the rotating electronic component connected and held by the chuck is rotated, and the resistance value of the strain gauge changes due to the bending of the plate at this time. Inspection method of a rotary operation type electronic component that continuously detects and determines the rotational load of a rotary shaft.