JP2016002427A - Support structure of earmuff - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support structure of earmuffs, constructed by a small number of components, excellent in strength and durability, and easy to assemble without using an industrial tool or requiring a fine work.SOLUTION: A support structure F of earmuffs is characterized such that: a connection structure J for connecting a head band 10 and an ear cup 40 and rotating a position of an ear pad in the left/right direction and front/back direction includes a band joint 20 comprising a bearing part 22 formed in a connection part 21 rotatably attached to the end of the head band 10, and an opening part 23 provided so as to pass the bearing part 22 in a direction crossing the axial direction of the bearing part 22, and a cup joint 40 comprising an extension part 32 extended from an axial part 31 pivotally supported in the bearing part 22 and passing the opening 23 followed by being fixed to the ear cup 40; and fixation parts 6 and 9 for holding the axial part 31 engaged with the bearing part 22 are provided.

Description

  The present invention relates to a support structure for an ear muff, and more particularly to a support structure for an ear muff that can be brought into close contact with each other inside a headband so as to be in a compact form. Is.

  2. Description of the Related Art Conventionally, a connecting structure is arranged at both ends of an arc-shaped curved headband, the headband is connected to an ear cup for supporting an ear pad that covers the ear, and the position of the ear pad is determined by the user's head. It has a connecting structure for rotating in the left-right direction, which is the part direction, and the front-rear direction, which is a direction intersecting with the left-right direction, and is compact by bringing the ear pads closer together inside the headband. Support structures for ear muffs that can be configured have been proposed (Patent Documents 1 to 6).

  Since the earmuff support structure as described above needs to assemble a plurality of parts in order to embody a connection structure for changing the positional relationship between the headband and the ear pad, the assembly work of the plurality of parts is simplified. It is requested to do.

  In addition, it is desirable that the earmuff support structure as described above suppresses the number of parts, avoids the use of small parts, and eliminates the use of tools in order to improve the efficiency of the assembly work.

  Furthermore, the earmuff support structure as described above is required to be elastic and strong enough to keep the ear pad against the head in a stable manner, and to be lightweight and compact. When changing the positional relationship between the band and the ear pad or folding the ear muff, it is necessary to have durability of the movable part such that the connection between the parts should not be easily disconnected.

  In addition, it is desirable that the earmuff support structure can stably maintain a compact form by bringing the ear pads close to each other so as to closely contact each other.

However, in the conventional earmuff support structure, it is necessary to assemble small pins and screws, and fine work using tools is required, and problems such as poor work efficiency and screws and pins are removed. There is a problem of fear.
In addition, in the conventional earmuff support structure, positioning cannot be performed with the angle of the earpad changed with respect to the headband, or the earpad is brought into close contact with each other so that the earpad is in a compact form. There is a problem that it cannot be maintained.

In addition, the “ear covering device” described in Patent Document 7 can change the position of the ear pad only in the front-rear direction, and the ear pad is over-squeezed in an attached state, or an excessive force is applied to the ear pad cup, resulting in failure. There is a problem that it is easy.
Patent document 8 discloses a technique for fixing the ear pad to the band member by inserting the end of the band member with the stopper projecting into the band insertion port of the ear pad. However, it is not possible to fold and approach the ear pad so that it is in close contact with the inner side of the headband so as to have a compact form.

JP 2009-22601 A Japanese Utility Model Publication No. 1-125319 Japanese Utility Model Publication No. 1-125320 JP-A-10-85251 Japanese Patent Laid-Open No. 10-79994 Japanese Utility Model Publication No. 58-182594 JP 2008-178501 A JP 2002-11036 A

As explained above, in the conventional earmuff support structure, it is necessary to assemble a small pin or screw, which requires fine work using a tool, such as a problem that work efficiency is not good, screw or pin There is a problem that there is a risk of losing.
In addition, in the conventional earmuff support structure, positioning cannot be performed with the angle of the earpad changed with respect to the headband, or the earpad is brought into close contact with each other so that the earpad is in a compact form. There is a problem that it cannot be maintained.

Therefore, the object of the present invention is to solve the above-mentioned problems in the conventional earmuff support structure, and is configured with a small number of parts, excellent in strength and durability, and without using a tool or a fine work. The object is to provide an earmuff support structure that can be easily assembled.
Another object of the present invention is to provide an earmuff support structure excellent in functionality capable of stably maintaining a plurality of states in which the position of the earpad is changed.
Furthermore, the other object of this invention is to provide the earmuff support structure which can obtain stably the state which contact | adhered earpads.

The present invention provides an “arc-shaped headband,
Ear cups that are arranged at both ends of the headband and support ear pads that cover the ears;
A connecting structure for connecting the headband and the ear cup, and for rotating the position of the ear pad in a left-right direction that is a user's head direction and a front-rear direction that intersects the left-right direction;
It is a support structure for an earmuff that can be brought into close contact with each other inside the headband so as to be in close contact with each other and can be made into a compact form,
The connecting structure is
(1) A connecting portion rotatably attached to an end portion of the headband, a bearing portion formed at one edge portion of the connecting portion, and a direction intersecting with an axial direction of the bearing portion. A band joint comprising an opening provided to pass through the bearing,
(2) a cup joint comprising: a shaft portion that is pivotally supported by the bearing portion; and an extension portion that extends from the shaft portion and is fixed to the ear cup after passing through the opening portion;
Have
By fixing at least one of the band joint and the cup joint and forcibly fitting the shaft portion into the bearing portion, a fixing portion that holds the shaft portion so as not to come out of the bearing portion is provided. Earmuff support structure provided. "Is the main feature.

The fixing portion according to the present invention may be a first retaining protrusion formed on an extension portion in the vicinity of the shaft portion of the cup joint.
The fixing portion may be a second retaining protrusion formed adjacent to the opening of the bearing portion of the band joint.

The band joint of the present invention may have a slanted portion that partially expands the periphery of the opening of the bearing portion, and the extension of the cup joint may easily pass through the opening. Good.
Further, the shaft portion and the bearing portion of the present invention are provided with unevenness capable of selectively locking the relative mounting angle between the band joint and the cup joint, and the ear pad is open when in use or the ear pad is compact. It may be configured to be able to hold the superimposed state.

  In the present invention, when the ear pad is held in a compactly overlaid state, the relative mounting angle between the band joint and the cup joint is such that the connecting surface of the band joint rotates, It may be set so that the angle formed with the opening surface of the ear cup fixed to the cup joint is in the range of 86 degrees ± 2 degrees.

The end portion of the headband of the present invention is provided with a dharma hole in which two large and small through holes having different diameters are partially overlapped, and the connecting portion constituting the connecting structure is a small diameter portion of the dharma hole. A rotary shaft that is pivotally supported, and has a rotary shaft having a large-diameter head at the tip,
The band joint can be assembled to the end of the headband by inserting the rotary head into the small diameter part of the Dalma hole after inserting the head into the large diameter part of the Dalma hole. It may be.

  Furthermore, the small-diameter portion of the Dharma hole of the present invention is preferably formed at the end of the headband on the side closer to the ear pad during normal use than the large-diameter portion of the Dharma hole.

Moreover, the connection part which comprises the said connection structure of this invention is equipped with the dharma hole which partially overlapped two large and small through-holes with different diameters,
The end of the headband is a rotary shaft that is pivotally supported by the small-diameter portion of the Dharma hole, and includes a rotary shaft having a large-diameter head at the tip.
The band joint can be assembled to the end of the headband by forcibly fitting the rotary shaft into the small diameter part of the Dalma hole after inserting the head into the large diameter part of the Dalma hole. It may be.

  The band joint according to the present invention is preferably configured such that a plurality of chamfered portions formed at the end portion of the headband selectively contact each other, thereby locking a relative mounting angle between the band joint and the headband. The front and rear positions can be selected.

The earmuff support structure of the present invention configured as described above is configured such that at least one of the band joint and the cup joint is deformed and the shaft portion is forcibly fitted into the bearing portion, thereby fixing the fixed portion. Thus, the shaft portion can be held so as not to come out of the bearing portion.
Therefore, the number of parts can be reduced, and an operation of assembling fine pins is unnecessary, and the earmuff support structure can be assembled easily and quickly.

  In the present invention, the fixing portion is formed adjacent to the first retaining protrusion formed on the extension portion in the vicinity of the shaft portion of the cup joint or the opening portion of the bearing portion of the band joint. By using the second retaining protrusion, the number of parts can be reduced, the structure is not complicated, and the strength of the parts is not lowered.

  In the earmuff support structure of the present invention, the band joint has a slanted portion that partially expands the periphery of the opening of the bearing portion, and the extension of the cup joint easily passes through the opening. Thus, the band joint and the cup joint can be assembled even when the protrusion that engages with the ear cup is provided on the extension, and the strength of the bearing can be prevented from being lowered by the opening. .

  Further, the shaft portion and the bearing portion of the present invention are provided with unevenness capable of selectively locking the relative mounting angle between the band joint and the cup joint, and the ear pad is open when in use or the ear pad is compact. By making it possible to maintain the superimposed state, it is possible to provide an earmuff excellent in usability.

In the present invention, when the ear pad is held in a compactly overlaid state, the relative mounting angle between the band joint and the cup joint is such that the connecting surface of the band joint rotates, By setting the angle with the opening of the ear cup fixed to the cup joint to be in the range of 86 ± 2 degrees, the ear pads do not float up and become bulky when they are overlaid, making it particularly compact State.
Therefore, it is easy to carry, has an excellent appearance, and can provide an earmuff having a high commercial value.

In the earmuff support structure of the present invention, a band joint can be easily and quickly assembled to the end of the headband by providing a dharma hole at the end of the headband and providing a rotary shaft having a head at the connecting portion. it can.
Furthermore, by forming the small-diameter portion of the dharma hole of the present invention at the end of the headband on the side closer to the ear pad during normal use than the large-diameter portion of the dharma hole, the rotating shaft comes out from the large-diameter portion. This can be effectively prevented.

  Further, the band joint can be easily and quickly assembled to the end portion of the headband by providing a dharma hole in the connecting portion constituting the connecting structure of the present invention and providing a rotating shaft at the end portion of the headband. .

  In the earmuff support structure of the present invention, a plurality of chamfered portions are formed at the end portion of the headband, the chamfered portions are selectively brought into contact with the band joint, and the relative relationship between the band joint and the headband is determined. By locking the mounting angle and selecting the front and rear positions of the ear pad, the ear muff can be stably used in various usage modes of the ear muff.

FIG. 1 is a perspective view showing an earmuff support structure according to an embodiment of the present invention. FIG. 2 shows an earmuff having an earmuff support structure according to an embodiment of the present invention. (A) is a perspective view showing a state of the earmuff during normal use, and (B) and (C) are earmuffs. It is a side view which shows a mode that an ear pad is rotated and it folds into a compact form. FIG. 3 is a diagram including a front view, a side view, a perspective view, a cross-sectional view, and the like of a plurality of parts constituting the ear muff support structure of an embodiment embodying the present invention. FIG. 4 is a perspective view, a plan view, a side view, a front view, and a bottom view of the inner band body constituting the ear muff support structure of an embodiment embodying the present invention. FIG. 5 is a perspective view, a plan view, a side view, a front view, and a bottom view of the outer band body constituting the earmuff support structure of an embodiment embodying the present invention. FIG. 6 is a perspective view, a plan view, a rear view, a front view, a side view, a cross-sectional view, and a bottom view of the band joint constituting the ear muff support structure of an embodiment embodying the present invention. FIG. 7 is a front view, a side view, a rear view, a bottom view, and a perspective view of a cup joint that constitutes the earmuff support structure of an embodiment embodying the present invention. FIG. 8 is a perspective view, a plan view, a front view, a side view, and a bottom view of an ear cup that constitutes an ear muff support structure according to an embodiment of the present invention. FIGS. 9A and 9B are a front view and a rear view showing a state where the band joint and the end of the band body constituting the ear muff support structure of the embodiment embodying the present invention are assembled. FIG. 10 is a cross-sectional view and a side view showing a state in which the band joint and the cup joint constituting the ear muff support structure of one embodiment embodying the present invention are assembled from the side. FIG. 11 is a side view showing the positional relationship (angle) with the band joint when the ear cup constituting the ear muff support structure of the embodiment embodying the present invention is rotated so as to be folded. FIGS. 12A and 12B are a front view and a rear view showing how the band joint and the end of the band body constituting the earmuff support structure according to another embodiment of the present invention are assembled.

The present invention provides an “arc-shaped headband,
Ear cups that are arranged at both ends of the headband and support ear pads that cover the ears;
A connecting structure for connecting the headband and the ear cup, and for rotating the position of the ear pad in a left-right direction that is a user's head direction and a front-rear direction that intersects the left-right direction;
It is a support structure for an earmuff that can be brought into close contact with each other inside the headband so as to be in close contact with each other and can be made into a compact form,
The connecting structure is
(1) A connecting portion rotatably attached to an end portion of the headband, a bearing portion formed at one edge portion of the connecting portion, and a direction intersecting with an axial direction of the bearing portion. A band joint comprising an opening provided to pass through the bearing,
(2) a cup joint comprising: a shaft portion that is pivotally supported by the bearing portion; and an extension portion that extends from the shaft portion and is fixed to the ear cup after passing through the opening portion;
Have
By fixing at least one of the band joint and the cup joint and forcibly fitting the shaft portion into the bearing portion, a fixing portion that holds the shaft portion so as not to come out of the bearing portion is provided. The earmuff support structure provided "can be suitably embodied by the embodiment described below.

Hereinafter, an embodiment of an earmuff support structure F embodying the present invention will be described with reference to the drawings.
As shown in FIG. 1, the support structure F of the earmuff 1 of the embodiment of the present invention is preferably composed of a plurality of parts molded from a synthetic resin having low friction and excellent strength and durability such as polyacetal (POM). It is manufactured by assembling these parts.

Specifically, the earmuff 1 support structure F includes a headband 10, a band joint 20, a cup joint 30, and an earcup 40.
Then, the headband 10 and the ear cup 40 are connected by the end portion of the headband 10, the band joint 20, and the cup joint 30, and the position of the ear pad 2 is set in the left-right direction which is the user's head direction, A connecting structure J for rotating in the front-rear direction, which is a direction intersecting with the left-right direction, is configured.
The ear muff 1 is configured to hold the ear pad 2 by ear cups 40 arranged at both ends of the headband 10, and the support structure F of the ear muff 1 is covered with a cloth cover 3. Yes.

The head band 10 is composed of an inner band body 11 and an outer band body 12 which are two arc-shaped plates curved in an arc shape, and the outer band body 12 can be inserted into one end of the inner band body 11. An annular portion 13 is provided.
In addition, a pair of locking portions 14 bent in an L shape are provided at one end of the outer band body 12, and the inner band body 11 can be inserted and held between the locking portions 14. It is like that.

And the full length adjustment of the headband 10 can be performed now by sliding those band bodies 11 and 12 combined so that it may overlap.
In addition, the thin part 15 which comprises the space which the said latching part 14 can slide is formed in the both-sides edge part of the inner surface of the said inner side band body 11, and the protrusion to the head side of the latching | locking part 14 is formed. The amount can be suppressed.

  Further, the other end portions of both band bodies 11 and 12 are provided with a dharma hole 4 in which two large and small through holes having different diameters are partially overlapped in order to constitute the connecting structure J. The large-diameter portion 4a and the small-diameter portion 4b constituting the hole 4 are located at both ends of the headband 10 so that the small-diameter portion 4a is closer to the ear pad 2 during normal use than the large-diameter portion 4b (ear cup 40 side). Is formed.

The band joint 20 constituting the connection structure J includes a connection portion 21 adopting a disk shape advantageous in strength in all directions, and a bearing portion 22 formed at one edge of the connection portion 21. ing.
The connecting portion 21 is a rotating shaft 5 that is rotatably supported on the inner surface of the connecting portion 21 by a small-diameter portion 4b of the Dharma hole 4 and has a large-diameter head 5a at the tip. The head 5a is inserted into the large diameter portion 4a of the Dalma hole 4 and then the rotating shaft 5 is forcibly fitted into the small diameter portion 4b of the Dalma hole 4 so that the end of the headband 10 is The band joint 20 can be assembled to the part.
That is, the connecting portion 21 of the band joint 20 is rotatably attached to the end portion of the headband 10 by the small diameter portion 4b and the rotating shaft 5, so that the coupling is not easily released. It has become.

  The ends of the band bodies 11 and 12 on the side where the Dalma hole 4 is provided have a shape in which a corner portion is cut by about 45 degrees, and comes into contact with the upper surface 22a of the bearing portion 22 so that the band The relative angle between the bodies 11 and 12 and the band joint 20 can be selectively locked and stabilized.

Further, the bearing portion 22 includes an opening portion 23 provided so as to pass through the bearing portion 22 in a direction intersecting with the axial center direction of the bearing portion 22, and the opening width of the opening portion 23 is The outer surface side t1 is set larger than the inner surface side t2.
Further, the axial length t3 of the shaft portion 31 formed at the upper end portion of the cup joint 30 is set to a dimension satisfying the inequality t1>t3> t2.

Therefore, the shaft portion 31 of the cup joint 30 inserted from the outer surface side of the opening portion 23 does not come out of the inner surface side of the opening portion 23 and is pivotally supported by the bearing portion 22 so as to be rotatable. It has become.
Further, the band joint 20 has a slanted portion 23a that partially expands the periphery of the opening 23 of the bearing portion 22 so that the extension portion 32 of the cup joint 30 can easily pass through the opening 23. Yes.

  The bearing portion 22 is extended in the vertical direction, and the cross section is formed in a track shape for athletics. A protrusion (second retaining member) along the axial direction of the bearing portion 22 near the center thereof. A protrusion 6) is formed. This protrusion functions as the fixing portion 6 that holds the cylindrical shaft portion 31 formed at the upper end portion of the cup joint 30 so as not to come out of the bearing portion 22 upward.

The bearing 22 has two groove-like recesses 7a and 7b along the axial center direction of the bearing 22 at the lower part of the inner surface that is always in contact with the shaft 31, and the two recesses 7a and 7b. Is formed at a position about 45 degrees away from the axis of the bearing 22.
On the other hand, the shaft portion 31 of the cup joint 30 is provided with a protrusion on the outer surface along the axial direction. This protrusion is the convex part 8 which selectively engages with the concave parts 7a and 7b of the bearing part 22, and selects the relative positional relationship (angle) between the cup joint 30 and the band joint 20. It functions to lock and stabilize.

  The axial direction of the rotary shaft 5 and the axial direction of the bearing portion 22 are oriented in a direction twisted by 90 degrees, whereby the position of the ear pad 2 is the left-right direction that is the head direction of the user, It is possible to configure a connecting structure J for rotating in the front-rear direction, which is a direction intersecting with the left-right direction.

The extension portion 32 of the cup joint 30 extends downward from the peripheral surface of the shaft portion 31 and is formed in an elongated plate shape that is fixed to the ear cup 40 after passing through the opening 23. In the embodiment, the upper portion is bent inwardly by 132 degrees in the shape of “he”.
Therefore, the overall shape of the cup joint 30 is substantially a “T” shape or a shaving tool.

  Further, the extension part 32 of the cup joint 30 is provided with a protrusion (first retaining protrusion 9) that protrudes in a wedge shape toward the upper part in the vicinity of the shaft part 31. Then, the upper end surface of the projection abuts on the outer surface of the periphery of the opening 23 of the bearing portion 22, so that the projection 31 is held so that the shaft portion 31 does not escape upward from the opening on the outer surface side of the bearing portion 22. It functions as the fixed part 9 to be performed.

  As shown in FIG. 7, the extension 32 of the cup joint 30 includes two locking projections 33 on the lower outer surface thereof and one locking projection 34 on the lower inner surface.

The ear cup 40 is formed in a dish shape having a plurality of through holes, and has a joint insertion port 41 at an upper part thereof.
The outer side surface and the inner side surface of the joint insertion port 41 are locking plate portions 42 and 43, and the locking projections 33 and 34 of the extension portion 32 inserted into the joint insertion port 41 come into contact with each other. The cup joint 30 and the ear cup 40 can be assembled.

Each component constituting the earmuff support structure of the present invention can be manufactured using a conventionally known resin molding technique.
Therefore, an example of a method for assembling the support structure F of the ear muff 1 by assembling the components constituting the support structure F of the ear muff 1 will be described.

First, the other end portions of the band bodies 11 and 12 are connected to the annular portion 13 and the locking portion 14 provided at the end portions of the band bodies 11 and 12 so that the both band bodies 11 and 12 are overlapped. Assemble the headband 10.
Next, the head portion 5 a of the rotary shaft 5 of the band joint 20 is passed through the large diameter portion 4 a of the dharma hole 4 of both the band bodies 11 and 12. In this case, as shown in FIGS. 9A and 9B, the band joint 20 is turned sideways so that the bearing portion 22 does not interfere with the work.
Then, as shown in FIGS. 9C and 9D, by pushing down the band joint 20 downward, the rotary shaft 5 is forcibly fitted into the small diameter portion 4b of the Dharma hole 4, and the headband 10 and the band joint 20 are connected. assemble.

Next, as shown in FIG. 10, the lower end of the extension portion 32 of the cup joint 30 is inserted from the outer surface side of the opening portion 23 of the band joint 20, and the fixing portion 9 of the cup joint 30 is inserted from the inner surface side of the opening portion 23. Assemble until forced out.
At the same time, the shaft portion 31 of the cup joint 30 slides over the fixing portion 6 formed in the bearing portion 22 of the band joint 20 from the upper side to the lower side to forcibly get over the shaft portion 31 from the lower portion of the bearing portion 22. The part 31 can be prevented from coming out.
The assembly of the band joint 20 and the cup joint 30 is performed mainly by a slight elastic deformation of the bearing portion 22 of the band joint 20.

  Further, when the extension part 32 of the cup joint 30 passes through the opening part 23 of the band joint 20, the opening part 23 is formed with a slanted part 23a. 34 can pass through the opening 23.

In order to assemble the headband 10, the band joint 20 and the cup joint 30 as described above, it is not necessary to use a separate tool, and a pin is used while aligning a plurality of parts using fine pins and nuts. There is no need for detailed work such as plugging.
Therefore, the assembly work of the headband 10, the band joint 20 and the cup joint 30 can be performed easily and quickly without hesitation.
The cloth cover 3 is attached to the headband 10, the band joint 20, and the cup joint 30 assembled in this manner, and the cloth cover 3 is attached to the ear cup 40 so that the ear pad 2 is sewn.

  Next, the extension part 32 of the cup joint 30 is inserted into the joint insertion port 41 of the ear cup 40, and the locking projections 33, 34 of the extension part 32 and the locking plate parts 42, 43 of the ear cup 40 are engaged. The earmuff support structure F is provided by assembling the cup joint 30 and the earcup 40, and the earmuff 1 is completed.

In the earmuff 1 having the earmuff support structure F configured as described above, the chamfered portion 16 formed at the end corner portion of the band body 11, 12 on the side where the dharma hole is provided is the upper surface 22 a of the bearing portion 22. Since the relative angle between the band bodies 11 and 12 and the band joint 20 can be selectively locked from five positions in increments of about 45 degrees, the headband 10 of the earmuff 1 is mounted on the back of the head. A state can be selected and the wearing state can be maintained stably.
Furthermore, as shown in FIG. 2C, the state in which the earmuff 1 is folded in a compact manner can be stably maintained.

  Further, since the shaft portion 31 of the cup joint 30 has the convex portion 8 that selectively engages with the concave portions 7 a and 7 b of the bearing portion 22, the relative relationship between the cup joint 30 and the band joint 20. Can be selected and locked, and the projection 8 is engaged with the recess 7b, whereby the earmuff 1 can be stably maintained in a compactly folded state (FIG. 10). And FIG. 11).

  Furthermore, when the ear pad 2 is held in a compactly overlaid state, the relative mounting angle between the band joint 20 and the cup joint 30 is such that the connecting portion 21 of the band joint 20 rotates. By setting the angle θ made with the opening surface of the ear cup 40 fixed to the cup joint 30 to be in the range of 86 degrees ± 2 degrees, the ear pads 2 can be stored in close contact with each other, The form of the earmuff 1 can be stabilized in a compact state (see FIGS. 11 and 2C).

In addition, as shown in FIG. 12, the rotating shaft 5 which has the head 5a is provided in the edge part of both the band bodies 11 and 12 of the said headband 10, and the headband is provided by providing the Dharma hole 4 in the said connection part 21. The band joint 20 may be easily and quickly assembled to the end portion of 10.
In this case, since the rotating shaft 5 cannot pass through the annular portion 13, the annular portion 13 is configured as a locking portion 14 and the connecting portion 21 is attached to the rotating shaft 5 that has passed between the locking portions 14. Configuration is conceivable.

  As described above, the earmuff support structure F of the present invention can reduce the labor and cost of manufacturing the earmuff 1, and is highly functional and excellent in strength and durability. An earmuff 1 can be provided.

The present invention is not limited to the above embodiment, and the overall shape, the cross-sectional shape of each part, the angle, the arrangement, etc. may be changed as appropriate without departing from the spirit of the present invention, or the strength and durability other than POM. You may carry out by changing suitably, such as comprising each component from the other excellent synthetic resin or metal material.
For example, the fixing portion 9 of the cup joint 30 may be elastically deformed so that the shaft portion 31 does not come out of the bearing portion 22 after being engaged with the bearing portion 22.
Further, as another embodiment of the earmuff support structure of the present invention, a headband 10 composed of a single band body may be used, and the dharma holes 4 or the rotating shafts 5 may be provided at both ends thereof.

  The present invention can be industrially used as an earmuff support structure that can be easily manufactured by assembling resin molded parts.

DESCRIPTION OF SYMBOLS 1 Ear muff 2 Ear pad 3 Cloth cover 4 Dharma hole 4a Large diameter part 4b Small diameter part 5 Rotating shaft 5a Head 6 Fixed part (2nd retaining protrusion)
7a Concave part 7b Concave part 8 Convex part 9 Fixed part (first retaining protrusion)
DESCRIPTION OF SYMBOLS 10 Headband 11 Inner band body 12 Outer band body 13 Annular part 14 Locking part 15 Thin part 16 Chamfering part 20 Band joint 21 Connection part 22 Bearing part 22a Upper surface 23 Opening part 23a Oblique part 30 Cup joint 31 Shaft part 32 Extension part 33 Locking protrusion 34 Locking protrusion 40 Ear cup 41 Joint insertion port 42 Locking plate part 43 Locking plate part F Earmuff support structure J Connection structure t1 Opening width on the outer surface side of the opening t2 Inner surface of the opening Side opening width t3 Shaft axial length θ angle (86 degrees in FIG. 11)

Claims (10)

An arc-shaped headband,
Ear cups that are arranged at both ends of the headband and support ear pads that cover the ears;
A connecting structure for connecting the headband and the ear cup, and for rotating the position of the ear pad in a left-right direction that is a user's head direction and a front-rear direction that intersects the left-right direction;
It is a support structure for an earmuff that can be brought into close contact with each other inside the headband so as to be in close contact with each other and can be made into a compact form,
The connecting structure is
(1) a connecting portion rotatably attached to an end portion of the headband;
A bearing portion formed at one edge of the connecting portion;
An opening provided to pass through the bearing in a direction intersecting the axial direction of the bearing;
A band joint consisting of
(2) a shaft portion pivotally supported by the bearing portion;
An extension that extends from the shaft and is fixed to the ear cup after passing through the opening;
A cup joint consisting of
Have
By fixing at least one of the band joint and the cup joint and forcibly fitting the shaft portion into the bearing portion, a fixing portion that holds the shaft portion so as not to come out of the bearing portion is provided. An earmuff support structure characterized by being provided.   2. The earmuff support structure according to claim 1, wherein the fixing portion is a first retaining protrusion formed on an extension portion in the vicinity of the shaft portion of the cup joint.   The earmuff support structure according to claim 1, wherein the fixing portion is a second retaining protrusion formed adjacent to the opening of the bearing portion of the band joint.   2. The band joint according to claim 1, wherein the band joint has a slanted portion that partially expands a peripheral edge of the opening of the bearing portion, and an extension of the cup joint facilitates passage through the opening. The earmuff support structure according to claim 3.   The shaft portion and the bearing portion are provided with unevenness capable of selectively locking the relative mounting angle between the band joint and the cup joint, and the ear pad is in an open state or a state where the ear pad is compactly overlapped. The earmuff support structure according to any one of claims 1 to 4, wherein the earmuff support structure can be held.   When the ear pad is held in a compactly overlaid state, the relative mounting angle between the band joint and the cup joint is fixed to the plane where the connecting portion of the band joint rotates and the cup joint. 6. The earmuff support structure according to claim 5, wherein an angle formed with an opening surface of the ear cup to be formed is set to be in a range of 86 degrees ± 2 degrees. The end of the headband includes a dharma hole that partially overlaps two large and small through holes with different diameters,
The connecting portion constituting the connecting structure is a rotating shaft that is pivotally supported by a small diameter portion of the Dharma hole, and includes a rotating shaft having a large-diameter head at a tip portion,
The band joint can be assembled to the end of the headband by inserting the rotary head into the small diameter part of the Dalma hole after inserting the head into the large diameter part of the Dalma hole. The earmuff support structure according to any one of claims 1 to 6, wherein:   8. The earmuff support according to claim 7, wherein the small-diameter portion of the dharma hole is formed at a side closer to the ear pad during normal use than the large-diameter portion of the dharma hole at the end of the headband. Construction. The connecting portion constituting the connecting structure includes a dharma hole in which two large and small through holes having different diameters are partially overlapped,
The end of the headband is a rotary shaft that is pivotally supported by the small-diameter portion of the Dharma hole, and includes a rotary shaft having a large-diameter head at the tip.
The band joint can be assembled to the end of the headband by forcibly fitting the rotary shaft into the small diameter part of the Dalma hole after inserting the head into the large diameter part of the Dalma hole. The ear muff support structure according to claim 1, wherein the ear muff support structure is provided.   The band joint has a plurality of chamfered portions that are selectively abutted on the end of the headband, so that the relative mounting angle between the band joint and the headband can be locked and the front and back positions of the earpad can be selected. The earmuff support structure according to any one of claims 1 to 9, wherein the structure is configured as described above.

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