JP2811151B2 - Answer switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a response switch, and more particularly, to a response switch suitable for an audiometer used for a hearing test.

[0002]

2. Description of the Related Art Conventionally, in an audiometer, a test subject is made to hear a test sound of a predetermined frequency and a sound pressure level, and a hearing test of the test subject is performed based on a response from the test subject. Has been made. At this time, the subject returns a response signal to the audiometer by the response switch. In this case, the subject presses the response switch when the test sound is heard, and releases the response switch when the test sound is not heard (hereinafter, this is called a response operation). The subject repeats this response operation sequentially for the test sound whose frequency and sound pressure level have been changed. The response is automatically recorded by an audiometer (or recorded by a laboratory technician), and the hearing level of the subject is then determined based on the recorded response.

[0003] As shown in FIG.
Has a switch lever 3 on the upper surface of the box-shaped case main body 2, and generates a response signal when the switch lever 3 is pressed. This response signal is transmitted to the audiometer main body via the cable 4. A display lamp 5 is exposed from the tip end surface of the case body 2, and the display lamp 5 is turned on by a pressing operation of the switch lever 3. Thus, the subject can confirm the ON state of the response switch 1 during the pressing operation.

The case body 2 has such a thickness that the examinee can easily grasp it, and a pair of case body halves 2A, 2B made of a synthetic resin material are fixed with screws 6A, 6B from the side. It is assembled by Thus, the subject grips the response switch 1 with one hand and, when hearing the inspection sound from the audiometer, presses the tip 3A of the switch lever 3 with the thumb in the direction shown by the arrow a to return a response signal. .

As shown in FIG. 5, a circuit board 7 on which a switch circuit is formed is provided below the inside of the case body 2. The switch circuit includes a lead switch 8, a display lamp 5, a resistance element for limiting current, and the like. When the lead switch 8 is turned on, a response signal is generated and the display lamp 5 is turned on.
Incidentally, the lead switch 8 has a structure in which a pair of lead pieces (that is, contact members) made of a magnetic material is disposed in a glass tube filled with an inert gas, and is switched to an ON state by a proximity operation of a magnet. In addition, the lead switch 8 has a contact portion of the lead piece that is made of gold or rhodium, has little contamination and oxidation of the contact, and has excellent reliability and durability. The response switch 1 has an extremely large number of pressing operations, and employs the lead switch 8 as a switch element from the viewpoint of reliability and durability.

The display lamp 5 soldered to the tip of the circuit board 7 is bent toward the tip of the case body 2 and is exposed to the outside through a window formed on the tip face of the case body 2. It has been made like that. The cable 4 soldered to the rear end of the circuit board 7 is wound around the outer periphery of a screw receiving member 9A provided at the rear of the case main body 2 and then passed through a hole formed in the rear end face of the case main body 2. It has been pulled out. In this case, the cable 4 is fastened and fixed via a buffer member 10 by a cable fixing member 11 made of, for example, a wire.

On the other hand, a switch lever 3 is pivotally supported by a rotating shaft 12 above the inside of the case body 2. When the subject stops pressing the switch lever 3, the switch lever 3 is rotated and returned in the direction shown by the arrow b by the urging force of the helical spring 13 wound on the outer periphery of the rotary shaft 12. I have. At this time, the switch lever 3 urged stops when the tip end of the switch lever 3 contacts the inner wall of the case body 2. On the other hand, at the time of pressing operation,
The switch lever 3 stops when the tip end of the switch lever 3 contacts the screw receiving member 9B. Here, cushion members 14A and 14B are adhered to the tip of the switch lever 3 and the inner wall of the case body 2, respectively. Thus, in the response switch 1, noise generated when the switch lever 3 comes into contact with the screw receiving member 9B or the inner wall of the case body 2 is reduced.

[0008] The projecting portion 3B of the switch lever 3 has
The magnet 15 is adhered so that when the switch lever 3 is pressed, the magnet 15 comes close to the reed switch 8. This makes the lead switch 8
Is turned on when the lead pieces come into contact with the lines of magnetic force radiated from the magnet 15. As a result, the response switch 1
Generates a response signal and turns on the display lamp 5 as described above.

[0009]

By the way, the subject is 1
In each of the hearing tests, the responding operation must be repeated about 80 to 120 times, resulting in fatigue during the hearing test. In particular, when the subject is an elderly person, he or she tends to grip the response switch 1 when he / she is tired, and there is a problem that a hearing operation is hindered, for example, a response operation to a test sound is delayed. In the response switch 1, the long stroke of the switch lever 3 is one of the causes of tiredness of the subject. However, when the stroke of the switch lever is shortened, the operational feeling is lost, and there is a problem that it is difficult for the subject to recognize the ON / OFF state of the response switch only by the pressed state. Therefore, if the structure is such that a feeling of operation can be obtained even if the stroke of the switch lever is shortened, it is considered that a response switch with good operability that does not tire the subject can be realized.

The reed switch 8 used in the response switch 1 is turned on by the lines of magnetic force radiated from the magnet 15, so that the reed switch 8 is switched on by the position of the magnet 15 when the switch lever 3 is pressed. The sensitivity may vary. Therefore, in response switch 1,
At the time of assembling, the mounting position of the magnet 15 was adjusted using jigs and the like. Therefore, if this adjustment can be omitted,
It is conceivable that the time required for assembling can be reduced.

In the response switch 1, a helical spring 13 is wound around the rotating shaft 12 in order to apply a biasing force to the switch lever 3, which has contributed to complicating the assembling work. Therefore, if the switch lever can be configured so as not to require a rotating shaft and a helical spring, it can be considered that the response switch can be inexpensive and the labor required for assembling can be further reduced.

Further, in the response switch 1, the case body 2
In order to reduce noise generated between the switch member and the switch lever 3, the cushion members 14A and 14B formed by cutting (or molding) the elastic member are adhered, and this is one factor that complicates the assembling work. It was connected. Therefore, if the cushion member can be made into a configuration that does not require bonding work,
It is conceivable that the time required for assembling can be further reduced. In addition, in this case, the cushion members 14A and 14B cannot actually completely muffle noise, causing a problem of annoyance during a hearing test.

The present invention has been made in view of the above points, and it is an object of the present invention to propose a response switch that can improve operability during use and reduce labor during assembly.

[0014]

According to the present invention, there is provided a response switch for use in a hearing test apparatus according to the present invention, wherein a pressing plate having one end supported by a case body and having an appropriate elastic force is provided. And pressing plate 2
5, a push button 22 formed on the other end, and provided on the case body 21, and when the push button 22 is pressed,
The click member 33 which performs a click operation with the press button 22
And a switch driving unit 25G provided at the other end of the pressing plate 25 for switching on and off a switch element 27 provided on the case body 21 in accordance with the pressed state of the pressing button 22.
And stopper portions 25D and 25E formed on the pressing plate 25.
And provided on the case main body 21 and provided with stop portions 25D, 2
Stoppers 31A, 31B, 38A, and 38B for regulating the position of the pressing plate 25 by contacting the stopper plate 5E are provided.

In the present invention, the bent portion 25C is formed in the middle of the pressing plate 25.

In the present invention, the stopper 25
D, 25E and / or stopper stoppers 31A, 31B, 3
8A and 38B are provided with buffer members 32A and 32B.

[0017]

With the provision of the click member 22 and the click member 33 which performs a click operation, a click feeling can be obtained when the press button 22 is pressed, whereby the operation can be performed even when the stroke of the press button 22 is shortened. A feeling is obtained. Thus, the responsiveness of the response switch 20 is improved. Further, a pressing button 22 having one end supported by the case body 21 and having an appropriate elastic force
And the switch element 2 according to the pressed state of the push button 22.
7, a switch driving unit 25G for switching on / off of the switch 7 and stop units 25D and 25E are provided.
Since the stopper body 31A, 31B, 38A, 38B for regulating the position of the pressing plate 25 by contacting the stopper plate 25E is provided on the case main body 21, the labor required for assembling can be reduced.

Further, since the bent portion 25C is formed in the middle of the pressing plate 25, the degree of bending of the pressing plate 25 can be easily adjusted.

The buffer members 32A and 32B are provided on the stopper portions 25D and 25E and / or the stopper portions 31A, 31B, 38A and 38B, so that the stopper portions 25D and 25E and the stopper portions 31A and 3B are provided.
1B, 38A, and 38B can reduce the noise which arises when it contacts.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

In FIG. 1, reference numeral 20 denotes a response switch used in an audiometer as a whole, and a case body 21 made of a synthetic resin material has a thickness enough to allow a subject to hold it with one hand. It is not vertically elongated. In addition, the thickness of the case main body 20 is suppressed as a whole so as to be stable when placed on a table. As a result, the response switch 20 can be operated not only by holding it with one hand but also by placing it on a table. The case main body 21 includes a case main body half 21A,
1B is assembled as a whole by screwing and fixing as shown in FIG.

On the upper surface of the case body 21, a switch button 22 made of a synthetic resin material is provided. The switch button 22 is formed in a plane circular shape having a size about the fingertip. The response switch 20 generates a response signal by pressing the switch button 22. In the response switch 20, the display lamp 23 is exposed from a hole provided on the upper surface of the case main body 21, and is turned on by a pressing operation of the switch button 22. Thus, the subject can confirm the ON state of the response switch 20 during the pressing operation. Further, in the response switch 20, a cable 24 is provided on the front surface of the case main body 21, and a response signal generated by a pressing operation of the switch button 22 is transmitted to the audiometer main body via the cable 24. I have.

Here, as shown in FIGS. 2 and 3, a circuit board 26 on which a switch circuit is formed is disposed inside the case body 21. The circuit board 26 is fixed to the case main body half 21B by screws 28. The switch circuit formed on the circuit board 26 generates a response signal by turning on the lead switch 27 and turns on the display lamp 23 as in the related art.

This response signal is transmitted to the cable 2 as described above.
4 to the audiometer body. The cable 24 includes a projection 29A formed on the case body half 21B.
To 29C, and is drawn out through a cable drawing hole formed in the front surface of the case body 21. A cable fixing portion 24A is formed on the cable 24, and this cable fixing portion 24A is connected to the projecting portions 29B, 29B.
By sandwiching the cable 24 between the C and the inner wall of the case main body 21, even when a force for pushing the cable 24 or a force for pulling out the cable 24 acts on the cable 24, the cable 24 can be fixed securely and without any damage. Has been made.

A switch lever 25 having a switch button 22 at one end is provided inside the case body 21.
It is arranged to extend in the longitudinal direction of the case body 21. The switch lever 25 is supported on the case body half 21B by fitting the fitting protrusions 25A, 25B projecting from the rear end into the fitting holes 30A, 30B formed on the case body half 21B. Have been. The switch lever 25 is made of a synthetic resin material.
When the pressing operation is stopped, it returns to the original state due to the elastic characteristic peculiar to the synthetic resin material.

Since the response switch 20 employs the switch lever 25 which returns to the original state by using the elastic characteristic, the overall size can be reduced as compared with the conventional one using a helical spring. The effort required for assembling can be reduced. Further response switch 2
0, the fitting projections 25A, 25B and the fitting holes 30A,
30B, the switch lever 25 is attached, so that the labor required for assembling can be further reduced.

In the middle of the switch lever 25, a bent portion 25 is provided.
C is formed, and the switch lever 25 bends downward with the vicinity of the bent portion 25C as a fulcrum when the switch button 22 is pressed. By changing the thickness of the bent portion 25C during molding, the degree of bending of the switch lever 25 can be easily adjusted.

In the middle of the switch lever 25, there are formed cylindrical stopper portions 25D and 25E protruding toward both side surfaces of the case body 21. As a result, when the switch button 22 is pressed, the stop levers 25D and 25E are connected to the case body half 21B.
By contacting the stopper receiving portions 31A and 31B formed in the above, the downward movement is stopped. When the subject stops pressing, the stop unit 2
When the 5D and 25E abut against the stopper receiving portions 38A and 38B formed on the case body half portion 21A, the upward movement of the switch lever 25 urged by the elastic properties of the synthetic resin material is stopped.

The grooves (not shown) formed in the stopper portions 25D and 25E are provided with O-rings 32A and 32B, respectively, and the stopper portions 25D and 25E and the stopper portions 31A and 31B or 38A and 38B. The noise generated at the time of contact between the two is reduced. In this case, the O-ring 3 is larger than the groove diameter of the stopper portions 25D and 25E.
The inner diameters of the O-rings 32A and 32B are slightly increased.
By providing play between A, 32B and the stopper portions 25D, 25E, the cushioning effect is enhanced and noise is further reduced. In this case, the O-rings 32A and 32B serving as cushion members are fitted into the grooves formed in the stopper portions 25D and 25E, so that the conventional bonding work is not required at the time of mounting, and the labor required during assembly is reduced. Is reduced.

A projection 25F is formed below the switch button 22 formed on the tip end of the switch lever 25. When the switch button 22 is pressed, the protrusion 25F presses a click member 33 made of, for example, rubber and provided on the circuit board 26. The click member 33 has a structure like a rubber rubber of a tact switch, so that a click feeling can be obtained when a pressing operation is performed. As a result, in the response switch 20,
A click feeling is obtained when the switch button 22 is pressed, and an operation feeling can be obtained even if the stroke of the switch button 22 is short.

At the tip end of the switch lever 25, there is provided a lead switch drive section 25G which projects forward from the switch button 22. A magnet storage chamber 25GA protruding downward from the tip of the lead switch drive section 25G is formed in the lead switch drive section 25G, and a small, cylindrical magnet 34 is press-fitted from below into the magnet storage chamber 25GA. ing. In the response switch 20, the size of the magnet 34 can be reduced by reducing the size of the magnet 34. As a result, the on / off state of the reed switch 27 can be switched by a slight movement of the magnet 34. . In this way, the response switch 20 can reliably perform the on / off control of the lead switch 27 even when the stroke of the switch button 22 is shortened. (That is, the stroke of the switch button 22 can be shortened.) Thereby, the responsiveness of the response switch 20 is improved, and the subject is not tired during the hearing test as in the related art.

In the response switch 20, the magnet storage chamber 2
Since the magnet 34 is press-fitted into the 5GA, the positional relationship between the lead switch 27 and the magnet 34 can be stabilized. Thus, the response switch 20 can omit the conventional mounting adjustment work at the time of assembly.

Here, when the switch lever 25 is bent downward by the pressing operation of the switch button 22, the lead switch driving portion 25G is lowered, whereby the magnet 34 is formed on the circuit board 26 almost directly above the lead switch 27. Hole 2
6B (that is, the magnet 34 is connected to the lead switch 2).
7). As a result, the reed switch 27 is turned on by the lines of magnetic force radiated from the magnet 34, generating a response signal and turning on the display lamp 23.

The lead switch driving section 25G is formed with a substantially rectangular stopper section 25GB protruding in the lateral direction from the middle of the lead switch driving section 25G. Normally, the downward movement of the switch lever 25 is caused by stopping the stopper portions 25D and 25E by the stopper receiving portions 31A and 31B.
Stop by contacting However, when the switch lever 22 is further pressed after the stopper portions 25D, 25E abut against the stopper receiving portions 31A, 31B, the distal end side of the switch portions 25D, 25E bends downward and is disposed at the distal end of the lead switch drive portion 25. The magnet 34 may hit the lead switch 27 and damage the lead switch 27. Thus, the stopper 25D,
When the distal end side of the lead switch 25G is bent downward, the stopper section 25GB formed on the lead switch drive section 25G abuts on the circuit board 26 to stop the downward movement of the lead switch drive section 25G. Avoid damage beforehand.

The case body half 21B on which the circuit board 26 and the switch lever 25 are disposed as described above is
5A and 35B secure the screw to the case body half 21A. In this case, the screw 35A is connected to the case body half 2
It is screwed to a screw receiving portion 37A provided in the case body half portion 21A via a hole 36A formed in 1B and a fool hole 25H formed in the switch lever 25. The screw 35B has a hole 36B formed in the case body half 21B,
It is screwed to a screw receiving portion 37B provided on the case body half portion 21A through a fool hole 26A formed in the circuit board 26.

Incidentally, by adopting such a configuration, in the response switch 20, the number of parts can be reduced as a whole, and the number of dies for dedicated parts can be reduced as compared with the conventional one.
Thereby, the response switch 20 can be inexpensive as a whole.

In the above configuration, the switch button 22
Is pressed, the switch lever 25 is bent.
The switch lever 2 is bent downward with the vicinity of C as a fulcrum.
A magnet 34 provided at the tip of the second 2 approaches the reed switch 27. As a result, the lead switch 27 is turned on, a response signal is generated, and the display lamp 23 is turned on. This response signal is transmitted to the audiometer main body via the cable 24.

When the switch button 22 is pressed, the protruding portion 25F provided below the switch button 22 presses the click member 33, so that the subject obtains a click feeling at the fingertip, and Button 2
The operation feeling can be obtained even if the stroke 2 is short.
When the switch button 22 is pressed, the stopper portions 25D and 25E are stopped by the stopper receiving portions 31A and 31B.
, The downward bending of the switch lever 25 is stopped. At this time, the O-rings 32A and 32B provided on the stopper portions 25D and 25E act as cushion members, and noise generated by contact between the stopper portions 25D and 25E and the stopper receiving portions 31A and 31B is reduced.

When the switch lever 22 is further pressed after the stopper portions 25D and 25E abut against the stopper receiving portions 31A and 31B in a state where the switch button 22 is pressed, the switch lever 22 is positioned at a more distal end side than the stopper portions 25D and 25E. The vicinity of the reed switch driving section 25G that bends downward. At this time, the stopper portion 25GB comes into contact with the circuit board 26, so that the magnet 34 is prevented from being lowered too much, and damage to the lead switch 27 is avoided.

When the subject stops pressing the switch button 22, the switch lever 25 is urged by the elastic characteristic and returns to the original state. In this case, since the stopper portions 25D and 25E abut against the stopper receiving portions 38A and 38B, the upward movement of the urged switch lever 25 stops. At this time, stop parts 25D, 2
The O-rings 32A and 32B provided on 5E function as cushion members, and noise generated by contact between the stopper portions 25D and 25E and the stopper receiving portions 38A and 38B is reduced.

According to the above configuration, the lead switch 27
By reducing the size of the magnet 34 for switching on and off, the stroke of the switch button 22 can be shortened, and by providing the click member 33 for giving a click feeling to the pressing operation of the switch button 22, the switch button 22 can be provided. Even when the stroke is shortened, an operational feeling can be obtained, and thus the operability of the response switch 20 can be improved. Incidentally, by improving the operability of the response switch 20, it is possible to perform a hearing test smoothly without tiredness of the subject.

A magnet 34 for switching the on / off state of the lead switch 27, stopper portions 25D and 25E for stopping the bending of the switch lever 25, and fitting projections 25A and 25B as means for attaching the switch lever 25 are connected to the switch lever 25. In addition, since the O-rings 32A and 32B as the cushion members are attached without bonding work, the time and labor required for assembling can be reduced as a whole.

In the above-described embodiment, the case where the lead switch 27 is used as the switch element has been described. However, the present invention is not limited to this. For example, a micro switch may be used. A switch element having high reliability and durability may be used even in applications where the number of operations is large.

In the above embodiment, the case where the magnet 34 is pressed into the magnet storage chamber 25GA has been described.
The present invention is not limited to this, and the magnet may be attached to the switch lever by integral molding.

In the above embodiment, the O-ring 3
The cushion member consisting of 2A and 32B is moved to the stopper section 25.
D, 25E, but the present invention is not limited to this, and the cushion member is connected to the stopper receiving portion 31A,
31B, 38A, and 38B may be provided.

[0046]

As described above, according to the present invention, the provision of the click member and the click member that performs the click operation enables the pressing operation of the press button even when the stroke of the press button is shortened. An operational feeling can be obtained, and thus the operability of the response switch can be improved. A pressing plate, one end of which is supported by the case body and which has an appropriate elastic force, is provided with a pressing button, a switch driving unit for switching on and off a switching element according to a pressing state of the pressing button, and a stopping unit. By providing the stopper receiving portion for regulating the position of the pressing plate by abutting the portion on the case main body, it is possible to reduce the labor required for assembling.

Further, since the bent portion is formed in the middle of the pressing plate, the degree of bending of the pressing plate can be easily adjusted. Further, by providing the buffer member in the stopper portion and / or the stopper portion, it is possible to sufficiently reduce noise generated when the stopper portion and the stopper portion come into contact with each other.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an external configuration of a response switch according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the internal structure of the response switch.

FIG. 3 is a sectional view showing the internal structure of the response switch.

FIG. 4 is a perspective view showing a conventional response switch.

FIG. 5 is a sectional view showing the internal structure of the response switch.

[Explanation of symbols]

1, 20 response switch, 2, 21 case body,
3 ... Switch lever, 5, 23 ... Indicator lamp, 22
...... Press button (switch button), 25 ... Press plate (switch lever), 25C ... Bend, 25D, 25
E: Stopper section, 25G: Switch drive section (lead switch drive section), 33: Click member, 31A, 3
1B, 38A, 38B ... stopper receiving part, 32A, 3
2B: Buffer member (O-ring).

Claims (3)

(57) [Claims] 1. A response switch used in a hearing test apparatus, comprising: a pressing plate having one end supported by a case body and having an appropriate elastic force; a pressing button formed at the other end of the pressing plate; A click member that is provided on the case body and that performs a click operation with the press button when the press button is pressed; and the case body that is provided at the other end of the press plate and that is pressed according to the pressed state of the press button. A switch driving unit that switches on and off a switch element provided in the case, a stop unit formed in the pressing plate, and a stop unit that is provided in the case body and regulates the position of the pressing plate by contacting the stopping unit. A response switch comprising a receiving part. 2. The response switch according to claim 1, wherein a bent portion is formed in the middle of said pressing plate. 3. The response switch according to claim 1, wherein a buffer member is provided on said stopper portion and / or said stopper receiving portion.