JPH03114319A - Telephone handset - Google Patents

Abstract

PURPOSE: To provide a handset which can be set even under a helmet, fitting a head by giving a flat shape which is unrelated to the shape of the head in the helmet with respect to position and fits the head. CONSTITUTION: A head band 12 has a shape, fitting the head and has parts 11a extending straight in two end part sides, and these parts support a receiver unit 3 and/or a receiver/microphone unit 2 which can be moved on these parts. In this case, both units 2 and 3 have ear brackets 26 and 31 bent toward the head, end the head band 12, the receiver unit 3, and the receiver/microphone unit 2 are positioned so that they do not project beyond the outermost planes of auricles at the time of setting the handset to a human body. Thus, the handset can be set even under the helmet fitting the head.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The invention relates to a handset set according to the preamble of claim 1.

Prior art handset sets have the challenge of enabling communication over distance. The acceptability of this type of set essentially depends on the extent to which it restricts the wearer's normal free movement. Handset sets are known which essentially consist of two auricular capsules and a lip microphone connected via a band. The auricular capsule and the integrated elements for the listening function accommodated therein advantageously allow communication, whether wired or wireless, to be carried out as uninterrupted by ambient noise as possible. It is configured as a hearing protection capsule so that it can be The transmitting function is carried out in this type of handset set by a noise-compensated, dynamic lip microphone according to the prior art, which, provided that it is operated according to specifications, is capable of absorbing ambient noise. is significantly suppressed. Apart from this, placing the microphone in front of the lip area in this manner may not be desirable for the wearer. So if you think about wearing an integrated helmet or a protective mask, for example.
If their use is absolutely necessary, the use of lip microphones becomes impossible. Additionally, lip microphones have been recognized to have the following drawbacks: That is, for example, when the transmitting preparation state is to be set again after a speaking pause period, delicate positioning of the microphone must be performed, and the positioning accuracy of the microphone directly affects the transmission quality. In order to eliminate this problem, so-called laryngeal microphones have been used instead of lip microphones. It is true that the last-mentioned microphone shows some improvement in transmission quality compared to the lip microphone when there is a large noise effect.
Positioning and securing the microphone in the correct position presents considerable challenges, regardless of whether the microphone is secured to a band or housed in a neckband. In addition to this point, known laryngeal microphones cannot reproduce individual tones.In order to also eliminate this problem, bone conduction microphones can be used to
Proposals have been made to place the device in the area of the computer and extract the audio there. A set of this type is described, for example, in German Patent No. 2 230 637. This set is located in the ear area, and it essentially consists of a single piece of cover in which the receiver and the microphone acting on the bone-conducted sound are located.

The cover itself is formed as a ring-shaped pad, allowing the ring to be hung around one ear. The bone-conducting microphone, which is preferably a moving coil gradient microphone, is excited in the vicinity of the bones of the temporomandibular joint, ie, the shepherd's bones.

The first drawback of this proposal is that the use of a moving coil gradient microphone, which itself has a large volume, already limits the efficiency with respect to the acoustic properties and the representation of the reproduced voice to a low level, thus resulting in a satisfactory reproduction of the voice. When attempting to do so, additional auxiliary means are usually required.

PROBLEM SOLVED BY THE INVENTION Another drawback in this set, and in all other known handset sets, is that they
This means that these handset sets cannot be used in conjunction with tight-fitting, individually matched helmets.Furthermore, the deployment of security or incident response or rescue teams may not be possible without breathing assistance equipment or It is recognized that all known handset sets are anyway unusable, as this is possible only with the help of respiratory protection masks. Readiness is not guaranteed due to insufficient or non-existent communications base.

It is certainly conceivable to incorporate a handset element into the respective head protection or helmet. However, the cost required for this purpose is extremely large. This is because, irrespective of which personnel are used, provision must be made for this of individually matched handset sets in the helmet for the entire team.

Furthermore, it is necessary to be able to accurately grasp changes in personnel from time to time in an organizational manner. The reason is that new helmets are required for new staff, or existing helmets have to be matched not only with respect to head alignment, but also with respect to the position of the handset element. In that case, once the helmet has been modified or replaced, for example on the basis of new ergonomic considerations, this will also have an effect on the handset element integrated into the helmet.

The present invention takes measures against this problem.

It is an object of the invention as claimed in the claims to provide a handset set which is "helmet-wearable", i.e. can be worn under any fitted helmet. The challenge is to maximize transmission quality even when protective masks should be worn.

MEANS FOR SOLVING THE PROBLEM According to the invention, this problem is solved by the features of claim 1.

An important advantage of the invention is that the handset set of the invention has a flat,
At the head I; at a point that has a shape. Even in the area of the ear, which acts both as a receiver and as a microphone, the handset set of the invention maintains its original characteristics in such a way that the receiver and the microphone themselves do not protrude beyond the plane of the wearer's pinna.

Another important advantage of the invention is that during donning of the handset set, the handset element can be guided in the vicinity of the pinna in a positionally correct and positionally stable manner based on the same movement.

Advantageous embodiments of the invention are set out in the further claims.

Embodiments Next, the present invention will be explained in detail with reference to the drawings, with reference to the illustrated embodiments.

All elements not necessary for a direct understanding of the invention have been omitted. Identical elements are provided with the same reference numerals in different figures.

FIG. 1 shows the entire handset set.

This set consists of a headband 11, a receiver/microphone unit 2, a receiver unit 3 and a control device 4. The headband 11 is stamped out of a thin elastic steel sheet or cut out entirely using a controlled laser beam. The geometrical shape of the headband 11 is characterized by having two narrow end portions 11a followed by a central portion 11b which has a double structure. After the shape of the headband has been separated from the whole, it is curved in such a way that a corresponding spring force acts according to the shape of the central head.

In this case, it is important that this curvature does not cause plastic deformation of the sheet material. This ensures that the headband 11 can be perfectly adapted to the shape of the respective head. The double part 11b is coated with a soft material, for example a thin leather belt, for comfort reasons. In doing so, it must be ensured that the flattened shape of the finished headband 11 is never lost. A cable guide 13 extends along one portion of the double portion 11b. It should be taken into account that the cable 35 of the receiver unit 3 is guided flat along one part of the part 21a 11b. The narrow portion 11a on the end side is the receiver/
It is used to accommodate the microphone unit 2 or receiver unit 3. The housing section 36 accommodates both units 2.
3 must be formed such that it is movable along the narrow portion 11a overcoming a certain adhesion friction.

For this purpose, a guide portion 36 is provided on the back side of each unit 2.3, and in connection therewith, a narrow portion 1
In 1a, a guide having a stopper function is obtained. Narrow section 1 of each unit 2.3 as support track
The necessary stopper function for 1a is, for example, the guide 36.
This can be achieved by means of a disc spring, which is not visible in the figure, and which is housed inside. This disc spring acts on the side edges of the narrow portion 11a. The ultimate purpose of this means is that when wearing the headband 11 two units, namely the receiver/
The point is that the microphone unit 2 and the receiver unit 3 can be guided to a predetermined insertion location in the same movement sequence. In this case, the optimal final position is ear bracket 26.31
Each unit 2. is located at the base of the ear.
3 curved ear brackets 26.31. The head-side curvature of the ear bracket 26.31 serves for locating and thereby assists in positioning the ear bracket 26.31 manually in each case in the area of the root of the ear when putting on the handset set. There will be no need. This ear bracket 26.31 is provided with various types of padding 34.26a for comfort reasons. The ear bracket 31 has a light base 3 provided thereon.
2, the other ear bracket 26, which has a simple end-side protective cap while having to perform a positioning effect on the relatively heavy base body 21, is preferably made of foam rubber material. It has an integrated pad 26a. Of course, other types of pads and other configurations may also be employed, depending on the particular requirements. Also,
Care must be taken to ensure that each ear bracket 2631 does not create pressure points during the installation of a snug protective cap and during other support of the cap. On its end side, the narrow part 11a is provided with a stop element 14, which serves as a restraint for the movable unit 2.3. One base 3
2 supports only the receiver 33, which is not fully visible. Of course, this base body 32 can also be designed correspondingly to the base body 21 defined for the other component. That is, it can be expanded to include a microphone 23. The cable 35 connected to the receiver 33 is led to the other unit 2, as already described. Where necessary, a strap 35a can be provided in addition to the cable line guide 13, which connects the cable 35 of the receiver 33 to the headband 11 in its entirety.

Another substrate 2 belonging to the receiver/microphone unit 2
1 is a thin tongue-like structure. That is receiver 22
In addition, a bone conduction microphone 23 is supported. The configuration of this microphone 23 will be explained based on FIG. 5. Regarding the positioning of the receiver 22 and the microphone 23, it is determined that the former lies in the inner ear, while the latter reduces bone-conducted sound in the area of the cranial exit of the bone outside the auditory canal (Os tympanicus). . Here, I would like to confirm that indirect propagation of vocal sounds is considered a problem. However, since this voice is output modulated according to timbre, relatively good quality can be expected in conjunction with an efficient microphone. In other words, these recorded sounds come from the oral cavity. In the oral cavity, the recorded sounds are finally output transformed according to the timbre, and from there they travel through the cranial auditory canal to the auditory tissue, ie to the cranial exit of the auditory canal bone. However, on the other hand, on the way to the ear-side ear canal, the recorded sounds are strongly attenuated and some are also subjected to distortion, hence the acoustical effects which in this case make the dual capability of the handset set impossible. In addition to facing decoupling problems, reproduction of recorded sounds using resonators placed in the ear can lead to unsatisfactory results.

The pressure forces on the units 2 and 3, in particular the receiver 22.33 and the microphone 23, which may occur when the helmet is placed on the head while the handset set is being fitted, additionally assist in positioning. Therefore, it works advantageously.

The cable 35 first interconnects the two receivers 22.33. A common receiver cable 35 from the receiver 22 is connected to a microphone cable 24 from one or more microphones 23 to form a common transmission cable 25, which is connected to the cable via ear brackets 26. It terminates at terminal 27. This cable terminal 27 is further led as a flexible cable 27a of various lengths, which is connected to the control device 4.
It terminates in a plug 28 for.

The control device 4 is constructed in such a way that it can be set into the active state via different controls. That is, the control device enters the receiving state when: manually via the transmit key 47, also referred to as the PTT switch.

Via a magnetic switch not visible in the figure that switches externally based on one magnetic pulse.

- Via priority channel. Regarding the switching, please refer to the 4th section.
This will be explained based on the diagram.

One via a Vox switch 48, which can be a conventional on-off switch.

On the outside of the control device 4, the following elements are furthermore visible: a receptacle 42 (see front) for accommodating the knee plug 28; Adjustment knob 43 for the intensity, only one microphone being visible from the illustrated control device 4, the other microphone being on the opposite side and therefore not visible.

A fixing clamp piece 44 used to enable the control device 4 to be supported, for example, on a belt; A battery monitoring lamp 45 that emits light briefly when it is turned on and flashes when it is discharged to a predetermined level; A detachable holder 49°, which, when removed, gives access to the battery housed there; and finally a cable with an associated plug 41a as a terminal for a radio device, which can be hung fixedly around the body. 41. With the configuration described above, it is no longer necessary to treat the wireless device as a hand-talkie wireless device.

By forcing the wireless device out of sight, a potential source of danger has been eliminated. Because of the high frequency,
This is because even in the ultra-high frequency range above 400 MHz, there is a risk that the retina of the eye may be damaged when the wireless device is used as a hand-talkie type wireless device.

FIG. 2 shows a self-mounted receiver/microphone unit 5, which is extended by a manual transmit key (PTT switch) 51 compared to the receiver/microphone unit 2 as a handset set shown in FIG. has been done. Of course, this unit 5 can also be accommodated directly in the handset set shown in FIG.

FIG. 3 shows the handset set worn on the body, ie, the handset set is placed against the wearer's head.

FIG. 4 shows the configuration of the electronic module in the control device 4. In this diagram, microphone 23,
The receiver 22.33 and the receiving elements 46a, 46b for ambient noise are shown. When activated into the communication mode by the wearer of the handset set via the microphone 23 or externally via the receiver 22.33, the electronic circuit connects the two receiving elements 46a, 46 which are directed outwards. b is set to the inactive state at the sound level without delay. Ambient noise to the receivers 22, 33 is now blocked, allowing wired or wireless interference-free communication. Limiter / 1st limiter / expander 61a, 61b located in the wiring leading to the receiver 22.33
It is blocked when communication is prioritized. Each of the limiter/compressor/expanders 61a, 61b has an adjustment knob 43 for setting the intensity of the sound at the receiver 22.33. These receivers 22
．． Further before 23, a headphone amplifier 62 is provided. When communication is given priority, a reception channel 63 and a low frequency signal channel 64 are established for incoming signals. The logic circuit 65 is used on the one hand for the external transmission operation and on the other hand inside the module for the low frequency control of the listening channel. In both cases, as is clear from the diagram in FIG. 4, one signal blocks the two receiving elements 46a, 46b, that is, blocks the ambient noise from the receiver 2233 due to the active control of communication priority. be exposed. Various amplifiers are used to maintain audio monitoring, or listening.

These amplifiers also direct the internal pulses from the microphone 23 to the receiver 22.33. The priority communication amplifier is
If no signal is present, whether via the receiving channel 63 or via the digital signal arriving in parallel as well as the listening channel, it is switched after, for example, 0.5-2 s, so that the receiving elements 46a, 46b are switched on again. The device is set to receive ambient noise. Limiter/compressor/expander 61a, 61b
ensures that the sound intensity of the incoming sound wave, once set via the adjustment knob 43, is maintained. It is advantageous here not to exceed 80d.

Here, the manual generation of the logic level signal takes place in a conventional manner via a transmission switch 47, which is accommodated in the control device 4 and which also actively controls the listening channel. In FIG. 2, this corresponds to switch 51. On the other hand, when it is desired to switch to voice operation, this is done via the Vox switch 48 which bridges the manual transmission switch 47. It is also possible to provide a magnetic switch 66 which enables communication when it is actively controlled. This last-mentioned circuit is particularly suitable when the wearer's hands are protected, for example by thick gloves, and when switching via a call operation is inconvenient. The energy supply in this circuit is based on a battery 45.

Redundant safeguards are provided in conjunction with the two limiter/compressor/expanders 61a, 61b. In other words, in the event of a malfunction or failure to properly adjust the sound level of the incoming sound waves, a diode, for example, acts momentarily, which cuts off the excessively high sound level to a maximum of, for example, 80 dB, and the wearer's Protect your hearing.

FIG. 5 shows an object 2 forming the mass of the piezoelectric resonator 23b1.
3a1 impedance converter 23f filter/equalizer 2
A bone conduction microphone is shown consisting of a contact capsule 23c and a contact capsule 23c. The above-mentioned elements are interconnected, as indicated by line 23d. Contact capsule 23
c must have a very large vibration capacity, and the resonator 23b located below it should be optimally excited by the bone-conducted sound arriving there. The use of slow-responsive and/or absorbent contact capsules 23c may have disadvantageous effects in this connection.

The resonator 23b is located in a "sandwich fashion" between this contact capsule 23c and the damping ring 23e.

The piezoelectric resonator 23b is attached to a mass-forming body 23a, preferably made of a dense material, which has a low absorption capacity for vibrations, as is the case for example with a hard copper alloy. The connection affects the vibration amplitude of the resonator 23b, which in turn results in a sharper resonance, which leads to an improvement in the reproduction quality. In addition, there is an impedance converter 23f inside the object 23a forming the mass.
and a filter/equalizer 23g are provided, which are connected to the resonator 23b via a voltage via a line 23d, and which improve the qualitative efficiency in the transmission of voice sound to the speech intelligibility. This will help you further improve your skills. That is, the impedance converter 23f provides impedance matching for the downstream wireless device, while the filter/equalizer 23g takes effect based on the presence of voice.

Effects of the Invention The handset set of the present invention has the feature that it can be worn under a helmet that fits snugly on the head, and the transmission quality does not deteriorate even when a protective mask is worn. There is.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the entirety of the handset set of the present invention and the control device belonging thereto, FIG. 2 is a schematic diagram showing the receiver/microphone unit as an independent component, and FIG. FIG. 4 is a block diagram of the electronic circuit of the control device, and FIG. 5 is a cross-sectional diagram schematically showing the bone conduction microphone. It is. 2... Receiver/microphone unit, receiver unit, 4... Control device 1.11°a, 1 l
b, l 2-Headband, 22°...Receiver, 23...7 Microphone, 26°...Ear bracket, 47j1...Transmission switch,...Vox switch 3...1 3 1 8 Procedure Written amendment (method) % formula % Display of the case Heisei 2 Name of the invention Year: Patent Application No. 77623 Person who makes amendments to the handset set Relationship to the case Patent applicant's full name Etvyn Zelier (and 1 other person)

Claims (5)

[Claims] 1. In a handset set consisting essentially of a headband, at least one receiver and at least one bone conduction microphone, said headband (12) comprises:
It is shaped to fit the head and has two straight end portions (11a), on which at least one receiver unit (3) is movable. ) and/or a receiver/microphone unit (2), each of said units (2, 3) having an ear bracket (26, 31) bent towards the head. and the headband (12) and the receiver unit and receiver/microphone unit (2, 3) are positioned without exceeding the outermost plane of the auricle when the handset set is attached to the human body. A handset set characterized by: 2. Receiver (22, 33) and bone conduction microphone (
23) is connected to a control device (4), which is connected - manually via a send switch (47) or - via a Vox switch (48) for the send key or - by a magnetic switch. Handset set according to claim 1, controllable via (66) or - via at least one communication priority channel (63, 64). 3. The bone conduction microphone (23) is a piezoelectric resonator (23b)
Handset set according to claim 1, characterized in that the resonator is connected to a mass-forming body (23a), an impedance converter (23f) and a filter/equalizer (23g). 4. A handset set according to claim 1, characterized in that the curved ear brackets (26, 31) are provided with a cushion section. 5. Receiver and receiver/microphone unit (
2, 3) are positioned, the receiver (2, 3) is positioned.
2, 23) are located inside the auricle, and the bone conduction microphone (23) is located in the cranial exit region of the bone outside the auditory canal.