JPH0224182Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Field of Application of the Technology" The present invention relates to a small switch incorporated in a hearing aid.

``Prior Art'' Pocket-type, ear-hook type, and glasses-type hearing aids with built-in batteries, which are generally used by people with hearing loss, are designed to be small, lightweight, and as thin as possible in order to be easily portable. The switch built into the hearing aid must necessarily be extremely small.

In order to make it ultra-compact, each part was attached to the shaft by caulking a washer onto the shaft, which made assembly and disassembly difficult.

In addition, two windows are formed on the handle that changes the contacts of the switch, and a power terminal is located in the window.
The circuit contact is provided on the top of the handle so that it can be connected to and removed from the power supply terminal, and the circuit contact is supported by a shaft with a washer via a ball presser spring, so dirt and dust may get into the contact. Sweat easily gets in, causing contact failure.

Further, since the shaft is provided with a contact piece, a handle, a circuit contact piece, and a ball presser spring, there are problems such as difficulty in positioning these parts.

In order to solve the above-mentioned problems with the hearing aid switch, the present applicant previously proposed an improved hearing aid switch in Utility Application No. 56-97705 (Japanese Utility Model Application No. 58-5243).

The hearing aid switch is as shown in Fig. 10, and has a shaft mounting hole approximately in the center, with a plurality of balls and a plurality of terminals on the outer periphery of the hole.
2. A base 1 on which a power terminal and a common terminal are arranged, and a shaft mounting hole 2 of this base 1.
A conductive shaft 4 having a groove into which the common terminal wire fits is formed on the outer periphery of the bottom and an E-ring insertion groove 3 formed on the top; Contact piece 5 configured to be separable
a collar 6 that is insertable into the shaft 4, engages with the contact piece 5, and has a key portion on its circumferential surface; It has a two-circuit contact piece 7 having a hole that fits into the key part and a notch at a different position, a keyway that is inserted into the collar 6 and fits into the key part of the collar 6, and a hole and a ridge into which the pole 8 fits. a handle 9 having a ridge formed therein; a pawl presser spring 10 inserted into the collar 6 and having a notch that engages with a protrusion of the handle 9 to press the pawl 8 of the handle 9 toward the base 1; , can be fitted into the E-ring insertion groove of the shaft,
This is a hearing aid switch comprising the aforementioned contact piece 5, collar 6, two-circuit contact piece 7, handle 9, and E-ring 11 for preventing the pole holding spring 10 from being pulled out in the axial direction.

The hearing aid switch constructed as described above is easy to assemble and disassemble, and repair is also possible. That is, by inserting the E-ring 11 into the E-ring insertion groove of the shaft 4, each component can be assembled and disassembled, and it is difficult for heat and dust to enter the contact portion, resulting in fewer failures.

The handle 9 only has a circular hole for inserting into the collar 6 and a pole insertion hole.
Since the pole holding spring 10 and the E-ring 11 are provided at the top of these, it is possible to achieve effects such as preventing heat and dust from entering between the contact piece 5, the two-circuit contact piece 7 and the terminal 12, and the power terminal. Ta.

However, in the process of mass producing hearing aid switches using automatic assembly machines such as robots, several problems arise due to manufacturing and assembly defects of each contact mechanism, stopper mechanism, shaft mechanism, and power circuit position. A new point has been raised.

That is, since the shape of the contact piece is complicated, if the collar is assembled to the contact piece with some misalignment, the contact piece will swing from side to side.

In addition, a common connection line (wire) is placed inside the recess of the conductive shaft.
When the base is automatically injection molded onto the conductive shaft, the common connection line may separate from the conductive shaft due to thermal influence.

This results in product defects.

In addition, when changing the switch built into a hearing aid, the locking step stops the knob in a fixed position only in one place on the outside left and right, so if a slightly excessive force is applied to the locking step, It may move out of position and cause a malfunction.

``Purpose of the invention'' The present invention simplifies the shape of each part of the hearing aid switch described above to facilitate positioning during assembly, minimize the vibration of each part after assembly, and incorporate the contact mechanism internally. The purpose of this invention is to provide a highly reliable hearing aid switch that is protected from external influences.

"Structure of the invention" In order to achieve the above object, the structure of the invention, that is, the technical means are as follows.

Vertical peripheral walls surrounding a disc having a knob at one end are formed above and below the disc, a cylindrical part with a stopper and an insertion hole is formed protruding from one side of the disc, and a cylindrical part with a stopper and an insertion hole is formed on the other side. A semicircular raised part is formed integrally with the peripheral wall, a ball insertion hole is formed on the opposite side of the raised part, and a part of the peripheral wall is formed integrally with one surface of the disc. a switch body in which a locking stepped portion is formed; a circuit contact piece and a collar made of an insulating material are fitted and fixed to the cylindrical portion of the switch body;
The base of a substantially front-rear circular contact piece is press-fitted between the left and right side walls of the collar, and a base of an insulating material on the front-rear circular contact piece is fitted into the base, and a plurality of terminals and switches are attached to the base. A hearing aid characterized in that the base is provided with a switching ball, and a ball spring that presses the ball in the ball insertion hole is fixed to the other surface of the disc of the switch body into which the base is fitted. The goal is to provide a switch for use.

``Effect of the invention'' With the above-mentioned technical means, the sides of the circuit contact piece are held in place by the side walls of the insulating material collar press-fitted into the hearing aid switch, so there is no misalignment during automatic assembly. , and can prevent horizontal swing of the contact piece during circuit switching.

In addition, when rotating the knob, a locking step on the inside of the base and a locking step on the outside of the knob are formed, and they lock each other at the left and right rotation limits (stoppers), so the rotational force is somewhat unreasonable. It will not be damaged even if it is affected by this, and can fully function as a hearing aid switch.

The common connection line is press-fitted between the inclined surface and the flat surface of the conductive shaft, and then the inclined surface is caulked inward, so that the connection between the common connection line and the shaft becomes even more secure, and the assembly work is improved. It is possible to prevent poor contact with the common connection line during use.

In addition, since both the power supply 2 circuit contact piece and the contact piece are located on the outside of the disc that is integrated with the knob into which the base is incorporated, it is possible to prevent dust and dirt from entering from the outside as well as sweat. This invention achieves the unique effects of the present invention without causing any deterioration in functionality.

``Example'' Hereinafter, the present invention will be described in the first part of the attached drawings showing the example.
This will be explained in detail with reference to FIGS. 9 to 9.

A hearing aid switch mainly includes a base 101, a shaft 201, a collar 301, a contact piece 401, and a knob 50.
1, a ball pressing spring 601.

Reference numeral 101 denotes a substantially ring-shaped base, which is integrally molded using an insulating material as shown in FIG. ,105
Tips 1021, 1031, 1041, 1051
is molded so that it is exposed, or the tip of the terminal is inserted through it, the other end is protruded to the outside, and the other side is a two-circuit silver wire bent inward, and the power terminal 10 is inserted.
6 and 107 are exposed, and two balls 108 and 109 are press-fitted and fixed between the terminals 106 and 107 at a required interval.

The protrusion 11 is located close to the balls 108, 109.
0 and 111 are formed, respectively.

This is integrally formed to prevent the other balls 112 from falling when the switch is switched.

Further, end faces 113 and 114 of a stopper are formed on the outer periphery of the base 101, and the end face on the knob 501 side is formed to abut against the end faces 113 and 114 of the stopper.

201 is an axis, as shown in FIGS. 2 and 3,
A substantially hollow cylindrical body is formed from a conductive material, and the cylindrical body 2
Upper and lower flanges 202 and 203 are formed below 01 at a required interval d, and the upper flange 202
The lower surface of the is a flat surface 204, and the lower flange 203
forms a tapered surface 205, and a common connection line 206 is press-inserted between the flat surface 204 and the tapered surface 205.

After that, several parts of the lower flange 202 are caulked toward the common connection line 206, and the common connection line 20
6 and the shaft 201 are integrally coupled.

A through hole 207 is formed in the shaft 201,
A screw is formed above the through hole 207.

Reference numeral 401 is a contact piece, which is cut out from a beryllium copper plate in a substantially front-to-back circular shape as shown in FIG.
Two slits 402, 402 are formed in parallel on one end side, and the terminal contact pieces 403, 403, 403 are formed in parallel.
A shaft insertion hole 404 is formed at the center of the square on the opposite side, and two protrusions 405 are formed on the head side of the square.

The tips of the protrusions 405, 405 are formed into a flat surface 406.

501 is a knob, as shown in FIGS. 5 to 7, which is integrally molded with a disk 502 using an insulating material, and ball pressing springs 601 are provided above and below the disk 502, as shown in FIG. A partition wall 503 that hangs down so that it can receive (lower side) and a semicircular protrusion 5
14 is formed, and on the opposite side (upper side) there is formed a partition wall 504 extending vertically so as to be able to receive the base 101, etc. On the base side, a partition wall 507 having the same width as the knob 501, a stopper 505, 506 are formed on the left and right.

A circular hole 508 is formed in the center of the disk 502, and a ball insertion hole 509 is further formed adjacent to the knob 501.

A groove 510 is formed on the opposite side of the knob 501, and raised portions, that is, rotational stoppers 511 and 512 are integrally formed on the left and right sides of the groove 510.

Key grooves 5081, 5081 are formed before and after the circular hole 508, or above and below.

A two-circuit contact piece 513 is provided on the base side of the disc 502.
The two-circuit contact piece 513 into which the two-circuit contact piece 513 is fitted has bow-shaped power terminal contact pieces 514 and 515 integrally formed on the left and right sides.

The collar 301 is fitted onto the two-circuit contact piece 513, and then the central cylindrical upper surface of the disc 502 is caulked as shown in FIG. 7 to fix the two-circuit contact piece 513 and the collar 301 to the disc 502.

The collar 301 is formed into a substantially circular ring shape made of an insulating plate, and has bulging portions 304, 304 having step portions 302, 303 that match straight lines 406, 407 on both sides of the rectangular head of the contact piece 401.
is formed.

Inserting the rectangular side portion of the contact piece 401 between the upper step portions 302 and 303 of the collar 301, 60
Reference numeral 1 denotes a ball pressing spring, which is a circular ring made of stainless steel as shown in FIGS.
A semicircular notch 602 is formed to engage with the center hole 603, and a substantially C-shaped slit 602 is formed around the center hole 603.
04 is formed, and a hemispherical protrusion 605 is formed on the plate surface opposite to the notch 602.

The configuration of the hearing aid switch of the present invention is as described above, and since the switch body is too small to assemble, the terminals are punched and connected to, for example, a beryllium copper plate, and a base is molded around the terminals and shaft. Then, the ball is press-fitted through a jig, and the two-circuit connection is connected in advance to the upper side of the disk 502 of the knob 501 (represented on the lower side in FIG. 9) as shown in FIG. The switch bodies, in which the piece 513 is fitted and the collar 301 is press-fitted and fixed, are overlapped, and the shaft 201 is attached to the disc 5.
A ball pressing spring 601 is fitted onto the shaft 201, and a washer 701 is fitted onto the upper part of the spring 601 via a poly washer.
The upper end of 1 is caulked using a jig to complete the process as shown in Fig. 9.

"About the action" When the knob is rotated to the right or left, the contact piece 4
01 contact pieces 403, 403 enable circuit switching such as volume, and 2-circuit contact piece 513 (Figs. 1 and 5)
514 is always in contact (ON) with 107, but 51
Since 5 is shorter than 514, 515 and 106 are turned OFF depending on the rotation angle of the knob, making it possible to switch the power supply circuit ON and OFF.

[Brief explanation of the drawing]

Figure 1 is a plan view of the base of the hearing aid switch of the present invention, Figure 2 is a front view of the shaft incorporated into the switch body of the hearing aid switch of the present invention, and Figure 3 is an enlarged view showing how the wire is connected to the shaft. Cross-sectional view, Figure 4a
is a plan view of the contact piece incorporated into the switch body, b is its side view, Fig. 5 is a plan view showing the state where it is attached to one side of the switch body, and Fig. 6 is a state with the contact piece removed from Fig. 5. 7 is a sectional view taken along the line A-A in FIG. 6, FIG. 8a is a plan view of the ball spring, b is a side view, FIG. 9 is a vertical sectional view of the hearing aid switch, and FIG. 10 1 is a longitudinal cross-sectional view of a conventionally known hearing aid switch. 101: Base, 501: Knob, 502: Disk, 601: Ball pressing spring, 112: Switch switching ball, 301: Color.

Claims (1)

[Scope of utility model registration request] Vertical peripheral walls surrounding a disc having a knob at one end are formed above and below the disc, a cylindrical part with a stopper and an insertion hole is formed protruding from one side of the disc, and a cylindrical part with a stopper and an insertion hole is formed on the other side. A semicircular raised part is formed integrally with the peripheral wall, a ball insertion hole is formed on the opposite side of the raised part, and a part of the peripheral wall is formed integrally with one surface of the disc. a switch body in which a locking stepped portion is formed; a circuit contact piece and a collar made of an insulating material are fitted and fixed to the cylindrical portion of the switch body;
The base of a substantially front-rear circular contact piece is press-fitted between the left and right side walls of the collar, and a base of an insulating material on the front-rear circular contact piece is fitted into the base, and a plurality of terminals and switches are attached to the base. A hearing aid characterized in that the base is provided with a switching ball, and a ball spring that presses the ball in the ball insertion hole is fixed to the other surface of the disc of the switch body into which the base is fitted. switch.