JP4714001B2 - Head holding device with built-in bone conduction speaker - Google Patents

Description

  The present invention relates to a head holding device with a built-in bone conduction speaker that can listen to music or the like by bone conduction (bone conduction sound) by holding the head, for example, a treatment chair or a car of a medical institution or the like. The present invention relates to a head holding device with a built-in bone conduction speaker that is effective as a headrest provided in a vehicle of this type, or as a normal pillow, particularly as a headrest of a dental treatment chair.

2. Description of the Related Art Conventionally, a head holding device in which a bone conduction speaker is incorporated in a pillow for holding a head or a headrest of a medical chair so that music or the like can be heard by bone conduction has been known (for example, patents). Reference 1 to Patent Document 4).
Bone-conduction speakers can be used for various purposes, such as being able to listen to sound anywhere on the head, and can be used as a hearing aid for hearing-impaired people with weak hearing. Is progressing.

For example, in dental treatment chairs, treatment sounds such as unpleasant mechanical sounds (driving sounds) and tooth cutting sounds generated by air turbines and other treatment instruments used during treatment can cause significant stress on the patient. It is a factor to give.
In view of this, Patent Document 4 discloses a head holding device with a built-in bone conduction speaker that allows a patient to listen to music and the like in order to relieve stress on the patient due to the treatment sound and to receive treatment in a relaxed manner. ing. In addition, the conversation between the hearing impaired person and the surgeon as well as the healthy person can be performed by bone conduction. For example, a bone conduction speaker is built in the headrest of the treatment chair so that the surgeon can treat the patient while explaining the condition of the treatment place and the treatment method.
JP 2004-57261 A (see paragraph number 0005 of the specification, FIG. 1 and FIG. 2) Japanese Patent Laying-Open No. 2005-151183 (see paragraph numbers 0027 to 0031 of the specification and FIGS. 8 to 10) JP-A-2004-275419 (see paragraph numbers 0029 to 0035 of the specification, FIG. 3 and FIG. 4) Japanese Patent Laying-Open No. 2005-66021 (paragraph numbers 0008 to 0011 in the specification, see FIG. 1)

However, in the head holding device with a built-in bone conduction speaker disclosed in Patent Document 1 and Patent Document 2, the bone conduction speaker is a buffer made of urethane or the like, which is an open-cell foamed body that constitutes a device body such as a pillow. Built-in (embedded) in the main body of the device in contact with the material (cushion material) and the outer skin (leather) covering the surface, so that the head is not mounted, that is, bone conduction Sound may leak even when the head is not in contact with the speaker.
This is because the bone conduction speaker is in constant contact (adhesion) with the cushioning material or the outer skin of the device main body, so it is a large area that constitutes almost the entire device main body that holds the head, and is continuous. The vibration of the bone conduction speaker is easily transmitted to the cushioning material made of air bubbles, and the vibration propagated to the cushioning material is converted into air vibration, so that the entire cushioning material becomes the speaker and air propagation sound is generated. For this reason, the entire apparatus main body acts as a normal speaker, which causes a leak of sound even when the head is not mounted.

Further, in Patent Documents 1 to 4, since the bone conduction speaker is incorporated in a fixed state in a fixed position of the apparatus main body, it is used as a pillow, for example, while sleeping. When listening to music or the like, it is easily subject to restrictions such as being unable to turn over and is bothersome to use.
In other words, if you change the orientation of the head, etc., it will not be possible to maintain contact with the bone conduction speaker that is located on the surface side of the pillow or exposed from the surface to the outside in a fixed state, and you will not be able to hear sound There is. In addition, this phenomenon can be caused not only by a non-contact state due to turning over, but also by the size and shape of the head, and so on.

  Therefore, the present invention was created to solve the above-described problems, and there is no sound leakage, no restrictions on use such as turning over, and the size and shape including the weight of the head. It is an object of the present invention to provide a head holding device incorporating a bone conduction speaker which is improved so that the bone conduction speaker is surely brought into contact with the head.

In order to solve the above-mentioned problem, in claim 1, a user's head comprising a back plate made of a rigid member, a cushioning material supported by the backplate, and an outer skin covering the surface of the cushioning material. a head support apparatus of the bone conduction speaker built for holding parts, said cushioning material and said outer skin and a space portion in the thickness direction of the apparatus main body configured of an appropriate thickness by the surface area of the extent to which the head rests by the provided, the space portion, it be built the bone conduction speaker in a non-contact state, the space portion is disposed on the rear surface of the cushioning material, the extent leading to the back surface of the skin, and, elastic said bone conduction speaker, wherein the buffer material and the degree to which may be incorporated in a non-contact state without touching the skin is formed in a size, the bone conduction speaker, which is supported by the back plate via a support member By the member, in the state of being close to the outer skin Supported built between portions, the outer skin is configured to move vertically displaced while being in contact with a constant contact force the conduction speaker is the head in accordance with the sinking degree sinking the like the weight of the head It is characterized by.

  According to the structure of Claim 1, the bone-conduction speaker is incorporated in the space part of the apparatus main body in a non-contact state. In other words, when the head is not placed, the bone conduction speaker is not in contact with the cushioning material or the outer skin constituting the apparatus main body, so there is no concern about sound leakage. When the head is placed, the bone conduction speaker comes into contact with the head via the outer skin of the apparatus body, and the vibration of the bone conduction speaker is transmitted to the head. Thereby, music etc. can be heard by bone conduction (bone conduction sound).

Further, in the present invention, the bone conduction speaker is supported and incorporated in the space portion in a state where the bone conduction speaker is brought close to the outer skin by an elastic member so that the outer skin sinks due to the weight of the head or the like. Accordingly, the conduction speaker is configured to move and move in the vertical direction, so that the bone conduction speaker can be applied to the head with a constant contact force regardless of the weight of the head (size, shape, etc. of the head). Can be contacted. In addition, even when the orientation of the head changes due to turning over or the like, the bone conduction speaker is elastically supported by the elastic member so that the bone conduction speaker is maintained in contact with the head without leaving the head.

In the present invention, the bone conduction speaker, by a variable member which expands and reduced by gas or liquid, that Do assumed is preferable to configure the support is built such that the displacement in the space portion.
With this configuration, the bone conduction speaker can be brought close to or in contact with the outer skin of the apparatus main body by expanding the variable member. Further, by adjusting the degree of swelling of the movable member, the contact condition (contact condition) of the bone conduction speaker to the head can be arbitrarily changed.

In the present invention, the bone conduction speaker, that Do assumed is preferable to configure the support is built such that the displacement in the space portion by the moving mechanism.
With this configuration, when used, the bone conduction speaker is brought close to or in contact with the outer skin of the apparatus main body by the moving mechanism, and the head is placed on the apparatus main body in this state, so that the bone conduction speaker is The head is reliably brought into contact with the outer skin, and the vibration of the bone conduction speaker is transmitted to the head.

According to a fourth aspect of the present invention, there is provided a head holding device having a built-in bone conduction speaker, wherein the device main body configured to have an appropriate thickness with a surface area on which the head is placed by a cushioning material and an outer skin or the like is arranged in the thickness direction. In addition to being formed variably, a space portion is provided in the thickness direction of the apparatus main body, and the bone conduction speaker is built in the space portion in a non-contact state, and the space portion is formed on the back surface of the outer skin. The conductive speaker is formed in a size that can be incorporated in a non-contact state without touching the cushioning material or the outer skin, and by shrinking the device main body in the thickness direction, The outer skin is configured to approach or contact the bone conduction speaker.

According to the structure of Claim 4 , like the effect | action of above-mentioned Claim 1, there is no worry of sound leakage in the unused state which does not put a head. And when using the device, the thickness of the device main body is changed by reducing the thickness of the device main body, and the device body skin is brought close to or in contact with the bone conduction speaker built in the space. Put the head on the main body. As a result, the bone conduction speaker comes into contact with the head via the skin of the apparatus main body, the vibration of the bone conduction speaker is propagated to the head, and music can be heard through bone conduction (bone conduction sound).

Further, the present invention provides a headrest apparatus of a bone conduction speaker built according to any one of claims 1 to 4, you characterized by comprising a microphone.
With this configuration, for example, when the head holding device is used (applied) as a headrest of a dental treatment chair, the surgeon explains to the patient the state of the treatment place and the treatment method by bone conduction. Can be treated while.

Since the bone holding speaker built-in head holding device according to the present invention is configured as described above, there is no risk of sound leakage in a non-use state where the head is not placed. And in the use state in which the head is placed, music and the like can be listened to reliably without being restricted in use such as changing the direction of the head such as turning over.
In addition, for example, when used (applied) as a headrest of a dental treatment chair, the bone conduction speaker is reliably in contact with the patient's head regardless of the size or shape of the patient's head, Through the bone conduction microphone, the surgeon can treat the patient while explaining the condition of the treatment place and the treatment method to the patient by bone conduction.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First embodiment]
FIG. 1 is a perspective view showing an embodiment of a head holding device incorporating a bone conduction speaker according to the present invention. FIG. 2 shows the first embodiment, and FIG. 2A is a cross section taken along the line aa in FIG. 1 showing a state in which the bone conduction speaker is approaching the outer skin without touching the outer skin of the apparatus main body. FIG. 2B is a cross-sectional view taken along line bb in FIG. 1, and FIG. 2C is a perspective view showing a state where bone conduction speakers are attached to both ends of the support member via elastic members. FIG. FIG. 3 shows a use state when the head is placed on the apparatus main body of the first embodiment, and (a) shows a bulging portion (outer skin) when a user having a relatively light head is used. It is sectional drawing which shows the contact state of the head and bone-conduction speaker by the sinking of a head, (b) is the outer skin sinking of the whole dent including a bulging part when a user with a comparatively heavy head uses it. It is sectional drawing which shows the descent | fall movement state of the bone conduction speaker according to the contact state of the head by the bone | frame and a bone conduction speaker, and the subsidence degree of an outer_layer | skin. FIG. 4 is a perspective view showing a usage pattern when the head holding device is used as a headrest of a dental treatment chair.

≪Description of head holding device≫
As shown in FIG. 2, the head holding device A is configured by incorporating the bone conduction speaker 2 in a non-contact state in a space 3 described later of the device main body 1.
In the present embodiment, in FIG. 1, the upper part of the paper is the upper part of the head holding device (device main body), the lower part of the paper is the lower part of the head holding device (device main body), and the left and right of the paper are the head holding device ( Both sides of the device body).

≪Explanation of bone conduction speaker≫
The bone conduction speaker 2 has a known structure, for example, there are two types, an electromagnetic type and a piezoelectric type. The bone conduction speaker 2 is not limited to the electromagnetic type and the piezoelectric type, and may be a bone conduction speaker having any structure. In this embodiment, an electromagnetic type is used.
Although not shown, the electromagnetic bone conduction speaker 2 is provided with a giant magnetostrictive rod having a property of expanding and contracting due to a change of a magnetic field in the center of the casing (yoke), and the current energy is mechanical energy. It can be converted to.

A magnetic field generating electromagnetic coil for forming a magnetic field corresponding to the audio current in the axial direction of the giant magnetostrictive rod is provided on the outer periphery of the giant magnetostrictive rod. Further, a magnetic field generating magnet is provided on the giant magnetostrictive rod on the outer periphery of the magnetic field generating electromagnetic coil.
One end of the giant magnetostrictive rod is fixed to the casing, and the other end is a free end that expands and contracts in the axial direction of the giant magnetostrictive rod due to a magnetic field change generated by the magnetic field generating electromagnetic coil. A movable rod is connected to the free end, and a vibration element is attached to the tip of the movable rod. The vibration element is configured to come into contact with (contact with) the head.

  The electromagnetic bone conduction speaker 2 configured in this way has a cord connected to an external current terminal provided at the bottom of the casing, etc., and a CD player or a bone conduction microphone C (see FIG. 4) described later, By being connected to another audio transmission device via a dedicated adapter or the like, the audio signal of the audio transmission device is supplied to the magnetic field generating coil of the bone conduction speaker as an audio current. As a result, the strength of the magnetic field formed in the axial direction of the giant magnetostrictive rod changes according to the audio current, and the giant magnetostrictive rod expands and contracts in the axial direction. When the vibration element vibrates due to the expansion and contraction, vibration is transmitted to the head, and music can be listened to by bone conduction (device main body).

≪Explanation of the device body≫
As shown in FIG. 2, the apparatus main body 1 has an appropriate size having a surface area and a thickness that can hold the user's head B using a cushioning material 1 a made of urethane or the like that is an open-cell foam. Is formed. The entire surface of the cushioning material 1a is covered with an outer skin 1b such as leather sewn so as to follow the shape of the cushioning material 1a.
Further, as shown in FIG. 2, a back plate 1c made of a synthetic resin material or other rigid material is assigned to the back surface of the cushioning material 1a. Further, on the surface of the cushioning material 1a, there are provided dents 5 that are recessed in a substantially spherical shape so as to follow the shape of the head B, leaving corner portions of both sides and upper and lower portions connected to both sides. As shown in FIG. 3, the head B is formed so as to be stably held in a fitted state.
Incidentally, the back plate 1c may be simultaneously addressed to the back surface of the cushioning material 1a when foaming the cushioning material 1a. Moreover, after foam-molding the buffer material 1a, it is arbitrary, such as fixing to the back surface using an adhesive agent.

In addition, as shown in FIG. 2, the apparatus main body 1 is provided with two space portions 3, and the bone conduction speaker 2 is supported and incorporated in the space portion 3 via an elastic member 4 described later. Yes. Further, as shown in FIG. 1, a constricted portion 6 is provided at a lower central portion of the apparatus main body 1.
For example, as shown in FIG. 4, the constricted portion 6 is formed so that when the backrest D <b> 2 of the dental treatment chair D is tilted, the patient's neck is inserted and the patient's neck is not lifted. Yes. This prevents pressure on the patient's neck. That is, when the patient's neck is lifted, the neck thrust may be compressed and the throat may be clogged. Therefore, the constricted part 6 is formed in the lower part of the apparatus main body 1 in the above-described dent 5 so as to prevent the patient's throat from being clogged. (See FIG. 2B).

≪Explanation of space part≫
The space portion 3 is built in a non-contact state in which the bone conduction speaker 2 does not touch the cushioning material 1a, the outer skin 1b, and the like constituting the device main body 1 when the head B is not placed on the device main body 1. As shown in FIG. 2, as shown in FIG. 2, two openings of the apparatus main body 1 with predetermined intervals are opened downward in the thickness direction of the apparatus main body 1 from the back plate 1 c of the apparatus main body 1 toward the outer skin 1 b. It is formed in a hole shape.
The space 3 has a depth that reaches the outer skin 1b that covers the dent 5 of the device main body 1 on which the head B is placed, and the bone conduction speaker 2, the elastic member 4 that supports the bone conduction speaker 2, and the support. The size of the opening is such that the member 7 does not contact the inner surface of the hole, and the bone conduction speaker 2 is supported and incorporated by the elastic member 4 and the support member 7.

  As shown in FIG. 2, a bulging portion 8 bulging in a gentle substantially arc shape is formed on the surface of the recess 5 positioned above the hole of the space portion 3 formed in the apparatus main body 1 in this way. Has been. As a result, the bulging portion 8 sinks and deforms due to the weight of the head B or the like, so that the head B comes into contact with the bone conduction speaker 2 built in and supported by the space portion 3 through the outer skin 1b. .

≪Description of elastic member≫
The elastic member 4 allows the bone conduction speaker 2 to be placed in two spaces on the apparatus main body 1 so that the bone conduction speaker 2 contacts (hits) the head B of the user placed on the apparatus main body 1 with a constant contact force. The unit 3 is built in and supported. Examples of the elastic member 4 include foam (sponge) and rubber having moderate elasticity, and a coil spring as shown.
As shown in the figure, when using a spring, it is preferable to use a damping material. That is, the vibration of the bone conduction speaker 2 is absorbed by the damping material, and the vibration to the back plate 1 c of the apparatus main body 1 through the support member 7 is prevented. Thereby, it can be expected to effectively prevent sound leakage to the outside.
Of course, the sound leakage effect can be more effectively prevented by forming the support member 7 also by the damping material.

  As shown in FIG. 2, the head holding device A according to the first embodiment configured as described above is provided with elastic members 4 at both ends of the support member 7 attached to the back plate 1 c of the device body 1. By supporting the bone conduction speaker 2, the bone conduction speaker 2 is brought into contact with the inner surface of the hole of the space portion 3 and close to the bulging portion 8 (outer skin 1b) above the hole of the space portion 3. Can be built-in and supported. As a result, when the head B is not mounted, the bone conduction speaker 2 can be brought into a non-contact state in which the bone conduction speaker 2 does not touch the cushioning material 1a and the outer skin 1b constituting the apparatus main body 1, and sound leakage is reliably prevented. It is configured as follows.

  As shown in FIG. 3 (a), when a user having a relatively light head B is used, the bulging portion 8 protruding substantially spherically on the surface of the recess 5 holding the head B is formed on the head. It sinks to the space part 3 side due to the weight of the part B. As a result, the head B comes into contact with the bone conduction speaker 2 via the bulging portion 8 (outer skin 1b), and the vibration of the bone conduction speaker 2 is transmitted to the head B to transmit music or the like (bone conduction sound). Can be heard.

Further, as shown in FIG. 3B, when a user having a relatively heavy head B uses, the dent 5 holding the head B sinks as a whole. Then, the bone conduction speaker 2 supported by the elastic member 4 is moved down according to the degree of sinking. As a result, even when a user with a relatively heavy head B is used, the contact with the bone conduction speaker 2 with respect to the head B when the user with a relatively light head B is used is substantially the same. Contact with contact force.
That is, the bone conduction speaker 2 can be brought into contact with the head B with a constant contact force regardless of the weight of the user's individual head B (the size and shape of the head). Thereby, for example, even if it is used for a long time, it can be used comfortably without feeling pain or discomfort due to contact (striking) with the bone conduction speaker 2.

Further, even when the orientation and angle of the head B changes due to turning over, and the sinking form such as the dent 5 of the device body 1 on which the head B is placed changes along the shape of the head B by turning over, the bone conduction speaker. 2 is built-in and supported by the elastic member 4, the bone conduction speaker is kept in contact with the head B without being separated from the head B by the elastic force of the elastic member 4.
That is, the elastic member according to the sinking degree of the dent 5 such that one of the bone conduction speakers 2 built and supported by the elastic member 4 in the two space portions 3 is moved downward and the other moved upward. 4, the bone conduction speaker 2 is kept in contact with the head B. Thereby, it can be used without being restricted in use.

  Further, as shown in FIG. 4, the head holding device A according to the present embodiment includes a microphone, and when used as a headrest of a dental treatment chair D or the like, the surgeon can tell the patient where to treat. It is configured so that treatment can be performed while explaining the state and treatment method thereof by bone conduction.

The microphone used in this embodiment is a bone conduction microphone C. This bone conduction microphone C picks up only the surgeon's voice without picking up the mechanical sound (driving sound) or tooth cutting sound generated from the treatment instrument, and sends only the operator's voice to the patient. It is a well-known bone-conducting structure that is configured to be heard by sound conduction).
It should be noted that the audio transmission device such as the bone conduction microphone C and the CD player and the bone conduction speaker 2 may be connected by wire or wireless. Although not shown, when the surgeon speaks to the patient, the bone conduction microphone C is turned on to temporarily stop the transmission of music from the CD player or the like. It can be configured to automatically switch so that the story of the surgeon is transmitted from C.

[Second Embodiment]
FIG. 5 shows a second embodiment of a head holding device with a built-in bone conduction speaker according to the present invention, wherein (a) is a perspective view showing the head holding device, and (b) is a bone conduction speaker. FIG. 6 is a cross-sectional view showing a state in which both ends of the vibration member to which is attached are approaching along the concave shape of the recess of the apparatus main body without contacting the outer skin of the apparatus main body, It is a perspective view which shows the state which attached the bone conduction speaker to the both ends of this.
As shown in FIG. 5, the head holding device A-1 is supported by the vibration member 9 so that the bone conduction speaker 2 is built-in and supported in the two space portions 3 provided in the device main body 1 in a non-contact state. It is configured.
Thus, in the head holding device A-1 according to the second embodiment, the bone conduction speaker 2 is built and supported in the space 3 by the vibration member 9, and the other components are described above. Since the same components as those in the first embodiment are basically the same, the same components are denoted by the same reference numerals, and redundant description is omitted.

≪Description of vibration member≫
As shown in FIGS. 5B and 5C, the vibration member 9 is formed by bending with a strip-shaped plate material, and both end sides thereof extend along the hole upper portion (the recess shape of the recess 5) of the space portion 3. Thus, it is formed to be bent in a substantially bowed shape (arc shape).
Further, as shown in FIG. 5B, the vibration member 9 is attached to the back plate 1c of the apparatus main body 1 at the central portion, so that both ends of the substantially arched shape having the bone conduction speaker 2 on the back side are recessed. 5 is formed so as to be embedded in both space portions 3 provided at two locations of the apparatus main body 1-1 in a state of approaching the outer skin 1b along the recessed shape. As a result, the bone conduction speaker 2 is incorporated and supported in both the space portions 3 of the apparatus main body 1 in a non-contact state in which the outer skin 1b and the cushioning material 1a are not touched.

  In the second embodiment, the space portions 3 provided at two locations of the device main body 1 are opened in a substantially groove shape that is longer than the plate width of the vibration member 9 and is long in the direction of the both side portions of the device main body 1. Thus, both end sides of the vibration member 9 can be made to exist over substantially the entire width direction along the recess shape of the recess 5 of the apparatus main body 1. Thereby, the contact area between the bone conduction speaker 2 and the head B is efficiently improved by the vibration member 9 without reducing the head holding force (appropriate cushioning and surface hardness) of the dent 5 portion on which the head B is placed. Can be widened.

  According to the head holding device A-1 configured as described above, the vibration of the bone conduction speaker 2 is transmitted to the head B via the vibration member 9 that the head B contacts. That is, by increasing the contact area with the head B by the vibration member 9, for example, even when the head B is turned and the orientation and angle of the head B are changed, the vibration of the bone conduction speaker 2 is reduced. The vibration member 9 that is long in the direction of the both sides and is present in the two space portions 3 along the recess shape of the recess 5 is surely transmitted to the head B.

  In addition, although illustration is abbreviate | omitted, the length of the both ends of the vibration member 9, a shape, etc. are not specifically limited. For example, it is possible to shorten the length to such an extent that the bone conduction speaker 2 can be attached. On the other hand, the shape is arbitrary, such as a linear shape, a substantially square shape, or a substantially square shape.

[Third embodiment]
FIG. 6 is a cross-sectional view showing a third embodiment of the head holding device with a built-in bone conduction speaker according to the present invention.
As shown in FIG. 6, the head holding device A-2 has two space portions 3 in which the bone conduction speaker 2 is provided in the device main body 1 by a variable member 10 that expands or contracts when a gas or liquid is taken in and out. In addition, it is constructed by incorporating a support so as to move and displace in a vertical direction in a non-contact state.
As described above, in the third embodiment, the bone conduction speaker 2 is built and supported in the space portion 3 by the variable member 10, and other components are basically the same as those of the first embodiment described above. Since the same components are denoted by the same reference numerals, the duplicate description is omitted.

≪Explanation of variable parts≫
As shown in FIG. 6, the variable member 10 is formed to expand or contract (squeeze) by taking in or out a gas or liquid, such as a balloon or balun, using rubber or other members. Yes. A hose 10a is connected to the variable member 10, and is compressed (squeezed) by inflating or extracting gas or liquid from a supply device (not shown), or air in this embodiment.
The variable member 10 formed in this way is attached to the top portion of the bone conduction speaker 2 and is fixedly incorporated in the space portion 3 by the back cover 11.

  Note that air can be sent to and removed from the variable member 10, and the amount and amount of air fed and the air pressure can be adjusted as appropriate by operating a rotary knob or a button provided in the supply device. I can do it. That is, by appropriately adjusting the degree of swelling of the variable member 10, when the bone conduction speaker 2 is separated from the outer skin 1 b, approaches or contacts the outer skin 1 b, or the head B is placed, the bone conduction to the head B is performed. The contact (hit) state of the speaker 2 can be arbitrarily changed.

According to the head holding device A-2 configured in this way, as shown by a two-dot chain line in FIG. 6, the air is removed from the variable member 10 to keep the bulge of the variable member 10 small. When the head B is not mounted, the bone conduction speaker 2 can be brought into a non-contact state separated from the outer skin 1b. Thus, sound leakage can be reliably prevented when not in use.
Then, by sending air into the variable member 10 and inflating it, the outer skin 1b of the dent 5 sinks due to the weight of the head B while the bone conduction speaker 2 is brought close to or in contact with the outer skin 1b. The part B contacts the bone conduction speaker 2 through the outer skin 1b, and the vibration of the bone conduction speaker 2 is transmitted to the head B. Thereby, music etc. can be heard by bone conduction (bone conduction sound). At this time, by adjusting the air pressure to change the degree of swelling of the variable member 10, the contact condition (contact condition) of the bone conduction speaker 2 to the head B can be adjusted to the individual user.

[Fourth Embodiment]
FIG. 7 shows a fourth embodiment of a head holding device with a built-in bone conduction speaker according to the present invention, and (a) is a cross-sectional view showing a state in which the bone conduction speaker is separated from the outer skin of the device main body. (B) is the same cross-sectional view in which the cross-sectional position is changed.
As shown in FIG. 7, the head holding device A-3 is supported by the moving mechanism 12 so that the bone conduction speaker 2 is displaced in a non-contact state and moved in the space 3 provided in the device main body 1. It is configured by incorporating it.
As described above, in the fourth embodiment, the bone conduction speaker 2 is built and supported in the space portion 3 by the moving mechanism 12, and other components are basically the same as those of the first embodiment described above. Since the same components are denoted by the same reference numerals, the duplicate description is omitted.

≪Description of moving mechanism≫
The moving mechanism 12 moves the lower end side of the tilting arm rod 12b with the bone conduction speaker 2 attached to the upper end to the upper and lower sides of the apparatus main body 1 by the cylinder 12a driven by compressed air or the like, thereby causing the bone conduction speaker 2 to move. Is formed so as to move up and down in the space 3 so as to approach the outer skin 1b or to move away from the outer skin 1b.

As shown in FIG. 7, the cylinder 12 a is attached to a bracket 13 whose rear end is attached to the back plate 1 c of the apparatus main body 1 and is connected to a compressed air generator (not shown) by a hose or the like. Yes.
The tilting arm 12b is pivotally attached to the bracket 14 attached to the back plate 1c at the center in the longitudinal direction, and tilts toward the upper side and the lower side of the apparatus main body 1 with the pivoting part P as a fulcrum. It is formed as follows.

  As shown in FIG. 7 (b), the bracket 14 is attached between the two space portions 3 so as to straddle the back plate 1c, and the two tilting arm rods 12b arranged in each space portion 3 are attached. A single pin 15 is connected by a shaft support. That is, by connecting the rod 16 of the cylinder 12a to the lower end side of one tilting arm rod 12b of the two tilting arm rods 12b arranged to be tiltable in the two space portions 3, the two space portions 3 are connected to each other. Both the tilting arm rods 12b respectively disposed are tilted to the upper side and the lower side of the apparatus main body 1 by one cylinder 12a.

  Although not shown in the drawings, the two tilting arm rods 12b arranged to be tiltable in the two space portions 3 may be tilted in synchronization or independently with the cylinders 12a provided respectively. .

  Moreover, compressed air is sent into the cylinder 12a, and the bone conduction speaker 2 is moved from the position indicated by the solid line (position away from the outer skin 1b) to the position indicated by the two-dot chain line (position close to the outer skin 1b). The movement is performed before the head B is placed in the recess 5 of the apparatus main body 1. For example, as described in FIG. 4 above, when used as a headrest for a dental treatment chair D or the like, it is performed when the patient is seated on the seating surface D1 or when the backrest D2 is tilted back. In this case, the compressed air generating device is operated by interlocking with a switch provided in the dental treatment chair D or the like, for example, a switch operation for tilting the backrest D2, and the bone conduction speaker 2 is moved by moving the cylinder 12a. It is possible to tilt the tilting arm rod 12b so as to approach or come into contact with the outer skin 1b.

According to the head holding device A-3 configured as described above, when not in use, the bone conduction speaker 2 is separated from the outer skin 1b of the device body 1 by the moving mechanism 12 as shown in FIG. Keep it. As a result, sound leakage can be reliably prevented when the head B is not mounted.
When the bone conduction speaker 2 is used, the bone conduction speaker 2 is brought close to or in contact with the outer skin 1b by the operation of the moving mechanism 12, and the head B is placed in the recess 5 of the apparatus main body 1 in this state. , The vibration of the bone conduction speaker 2 is propagated to the head B. Thereby, music etc. can be heard by bone conduction (bone conduction sound).

[Fifth Embodiment]
FIG. 8 shows a fifth embodiment of the head holding device with a built-in bone conduction speaker according to the present invention, and (a) is a cross-sectional view showing a state in which the bone conduction speaker is separated from the outer skin of the device body. (B) is the same sectional drawing which changes and shows a sectional position, (c) is a sectional view showing the use state where the main part of the device was shrunk in the thickness direction and the bone conduction speaker was made to approach the outer skin. .
As shown in FIG. 8, the head holding device A-4 is configured such that the device main body 1-1 is variably formed in the thickness direction, and a space portion 3-1 is provided in the thickness direction of the device main body 1-1. The bone conduction speaker 2 is supported and incorporated in the space 3-1 in a non-contact state.

≪Explanation of the device body≫
The apparatus main body 1-1 has a surface area and a thickness that can hold the user's head B using the cushioning material 1a made of urethane or the like, which is an open-cell foam, as in the first embodiment. It is formed in an appropriate size having a thickness. The entire surface of the cushioning material 1a is covered with an outer skin 1b such as leather sewn so as to follow the shape of the cushioning material 1a, and a back plate 1c is assigned to the back surface of the cushioning material 1a.
Moreover, as shown in FIG. 8, the apparatus main body 1-1 arrange | positions the 2nd backplate 1d currently formed in the same shape as this backplate 1c in the appropriate space from the backplate 1c, A cylindrical body 17 is attached to the peripheral edge between the second back plate 1d and the back plate 1c.

The cylindrical body 17 is formed in a bellows shape that is the same shape as the back plate 1 in plan view and can be expanded and contracted in the cylinder direction, and the interval between the back plate 1c and the second back plate 1d is narrowed. That is, when the apparatus main body 1-1 is pushed downward from the surface thereof, the apparatus main body 1-1 is formed to be variable in the thickness direction as shown in FIGS. 8B and 8C.
And the thickness of the apparatus main body 1-1 is made into 1st mentioned above by including the filler 21 between the backplate 1c enclosed by the cylinder 17 in the sealing form, and the 2nd backplate 1d. It is approximately twice as thick as the apparatus main body 1 in the embodiment.
The filler 21 is formed of a sponge that is softer than the cushioning material 1a, for example, excellent in elasticity.

In addition, the back plate 1c of the apparatus main body 1-1 is kept in this state when the apparatus main body 1-1 is contracted in the thickness direction by reducing the distance between the back plate 1c and the second back plate 1d. There are provided one or several fasteners 18 having a hook shape, and the fasteners 18 are detachably engaged with the second back plate 1d.
In addition, since the surface shape of the apparatus main body 1-1 on which the head B is mounted is basically the same as that of the first embodiment, the same components are denoted by the same reference numerals, and redundant description is omitted.

≪Explanation of space part≫
As shown in FIG. 8, the space 3-1 passes through the back plate 1 c from the second back plate 1 d of the device body 1-1 at two places on the device body 1-1 with a predetermined interval. It is formed in a hole shape in the thickness direction of the apparatus main body 1-1 at a depth to reach the outer skin 1b.
Further, the space portion 3-1 is formed with an opening size such that the bone conduction speaker 2 and the support member 19 that supports the bone conduction speaker 2 do not contact the inner surface of the hole. The support member 19 and the support member 19 The bone conduction speaker 2 is supported and incorporated by the support member 20 attached to the back plate 1c.

In the illustrated example, the support member 19 is formed in a cylindrical shape having an appropriate height, but may be formed using a coil spring or the like as in the first embodiment described above. By using a coil spring, the same action as the elastic member 4 in the first embodiment can be obtained, which is effective.
Although not shown, the variable portion in the thickness direction of the apparatus main body 1-1 formed by the back plate 1c, the second back plate 1d, and the cylindrical body 17 is defined as a sealed space. The apparatus main body 1-1 may be formed so as to be variable in the thickness direction by an air system in which air is contained in an appropriate air pressure state. In this case, it is set as the space sealed using the bellows-shaped cylinder also in the part in which the space part 3-1 is formed.

According to the head holding device A-4 configured in this way, as shown in FIGS. 8A and 8B, the bone conduction speaker 2 can be used as the outer skin 1b when the head B is not used. In the non-contact state where the buffer material 1a is not touched, it can be incorporated in the two space portions 3-1 of the two locations of the apparatus main body 1-1. Thereby, sound leakage can be reliably prevented.
And by pushing down the surface side of the apparatus main body 1-1 and shrinking the apparatus main body 1-1 in the thickness direction, as shown in FIG. When the outer skin 1b of the dent 5 sinks due to the weight of the head B with the 1b approaching or contacting, the head B comes into contact with the bone conduction speaker 2 via the outer skin 1b, and the vibration of the bone conduction speaker 2 occurs. Is propagated to the head B. Thereby, music etc. can be heard by bone conduction (bone conduction sound).

The specific configuration of the embodiment of the present invention is not limited to the above-described embodiment, and there is a change in the design within the scope of the present invention described in claims 1 to 7 without departing from the gist of the present invention. However, it is included in the present invention.
For example, the space portions 3 and 3-1 in which the bone conduction speaker 2 is incorporated are not limited to two places, and the bone conduction speaker 2 is more reliably in contact with the head B even when turning over or changing the angle of the head B. Thus, it may be provided at a plurality of places such as three places or four places, and is optional.
Further, the microphone is not limited to the bone conduction microphone C, and may be a generally known voice microphone (microphone).

1 is a perspective view showing an embodiment of a head holding device incorporating a bone conduction speaker according to the present invention. 1 shows a first embodiment of a head holding device with a built-in bone conduction speaker according to the present invention, and (a) shows a state in which the bone conduction speaker is approaching the outer skin without touching the outer skin of the device main body. 1 is a cross-sectional view taken along line aa in FIG. 1, (b) is the same cross-sectional view taken along line bb in FIG. 1, and (c) is an elastic member at both ends of the support member. It is a perspective view which shows the state which attached the bone conduction speaker. The use state when the apparatus main body head of the first embodiment is placed is shown, (a) is the head due to the swell of the bulging portion (outer skin) when used by a user with a relatively light head FIG. 6B is a cross-sectional view showing a contact state between the head and the bone conduction speaker, and FIG. 5B is a diagram showing a head and bones due to the sinking of the outer skin of the entire dent including the bulging portion when a user having a relatively heavy head is used. It is sectional drawing which shows the contact state with a conduction speaker, and the descent | fall movement state of the bone conduction speaker according to the sinking degree of the outer skin. It is a perspective view which shows the usage example at the time of using the head holding | maintenance apparatus which concerns on the said 1st Embodiment as a headrest of a dental treatment chair. 2 shows a second embodiment of a head holding device with a built-in bone conduction speaker according to the present invention, (a) is a perspective view showing the head holding device, and (b) shows a bone conduction speaker attached thereto. It is sectional drawing which shows the state which the both ends side of the vibrating member which has approached along the concave shape of the dent of an apparatus main body, without touching the outer skin of an apparatus main body, (c) is bone conduction to the both ends of a vibrating member It is a perspective view which shows the state which attached the speaker. It is sectional drawing which shows 3rd Embodiment of the head holding | maintenance apparatus with a built-in bone conduction speaker which concerns on this invention. 4th Embodiment of the head holding | maintenance apparatus with a built-in bone conduction speaker which concerns on this invention is shown, (a) is sectional drawing which shows the state which the bone conduction speaker has left | separated from the outer skin of the apparatus main body, (b) These are the same sectional drawing which changed the section position. 5 shows a fifth embodiment of a head holding device incorporating a bone conduction speaker according to the present invention, wherein (a) is a cross-sectional view showing a state in which the bone conduction speaker is separated from the outer skin of the device main body; These are the same sectional drawings which change and show the position of a section, and (c) is a sectional view showing the use state where the main part of a device was shrunk in the thickness direction and the bone conduction speaker was brought close to the outer skin.

Explanation of symbols

A, A-1, A-2, A-3, A-4 Head holding device 1, 1-1 Device body 1a Buffer 1b Outer skin 2 Bone conduction speaker 3, 3-1 Space 4 Elastic member 9 Vibration member DESCRIPTION OF SYMBOLS 10 Variable member 12 Movement mechanism B Head C Bone conduction microphone (microphone)
D Dental treatment chair

Claims (5)

A head holding device with a built- in bone conduction speaker , which includes a back plate made of a rigid member, a buffer material supported by the back plate, and an outer skin covering the surface of the buffer material to hold the user's head Because
Said cushioning material and a space portion is provided in the thickness direction of the apparatus including the main body in the thickness of the appropriate surface area to the extent that the head rests by the outer skin, the space portion, the non-contact form of the bone conduction speaker Built in the state,
The space is disposed on the back surface of the cushioning material and reaches the back surface of the outer skin, and the bone conduction speaker can be incorporated in a non-contact state without touching the cushioning material and the outer skin. is formed in size,
The bone conduction speaker is supported and incorporated in the space portion by being close to the outer skin by an elastic member supported by the back plate via a supporting member, and the outer skin sinks due to the weight of the head or the like. A head holding device with a built-in bone conduction speaker, wherein the conduction speaker is configured to move up and down while contacting the head with a constant contact force according to the degree of sinking . A head holding device with a built-in bone conduction speaker,
A space portion is provided in the thickness direction of the apparatus main body configured to have an appropriate thickness with a surface area on which the head is placed by the cushioning material and the outer skin, and the bone conduction speaker is received in a non-contact manner in the space portion. Built-in,
The space is formed to a size that allows the bone conduction speaker to be built in a non-contact state that does not touch the cushioning material and the outer skin, to the extent that it reaches the back surface of the outer skin,
The bone conduction speaker has a built-in bone conduction speaker and is supported by a variable member that expands and contracts by gas or liquid so as to move and displace in the space. A head holding device with a built-in bone conduction speaker,
A space portion is provided in the thickness direction of the apparatus main body configured to have an appropriate thickness with a surface area on which the head is placed by the cushioning material and the outer skin, and the bone conduction speaker is received in a non-contact manner in the space portion. Built-in,
The space is formed to a size that allows the bone conduction speaker to be built in a non-contact state that does not touch the cushioning material and the outer skin, to the extent that it reaches the back surface of the outer skin,
The bone conduction speaker has a built-in bone conduction speaker that is supported and incorporated so as to move and displace in the space by a moving mechanism. A head holding device with a built-in bone conduction speaker,
A device body configured to have an appropriate thickness with a surface area on which the head is placed by the cushioning material and the outer skin is variably formed in the thickness direction, and a space portion is provided in the thickness direction of the device body. In the part, the bone conduction speaker is built in a non-contact state,
The space is formed to a size that allows the bone conduction speaker to be built in a non-contact state that does not touch the cushioning material and the outer skin, to the extent that it reaches the back surface of the outer skin,
A head-holding device with a built-in bone conduction speaker, wherein the device body is contracted in the thickness direction so that the outer skin approaches or contacts the bone conduction speaker. The head holding device with a built-in bone conduction speaker according to any one of claims 1 to 4 , further comprising a microphone.

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