JP6935080B2 - Fixing device to the shaft - Google Patents

Description

The present invention relates to a fixing device capable of fixing a television monitor, a speaker, or the like by using, for example, a shaft (stay) of a headrest mounted on an automobile seat.

A system is provided in which a TV monitor is placed behind the driver's seat or passenger's seat of a car so that passengers seated in the rear seat can watch it. The television monitor is generally attached via a fixing device that utilizes a stay that supports the headrest of the seat. Also provided are fixing devices to which the speaker system can be attached using the stays that support the headrest.

For example, Patent Document 1 discloses a fixing device for attaching a TV monitor to a stay of a headrest, and Patent Document 2 provides a fixing device for attaching left and right speakers to each stay of a headrest. It is disclosed.

JP-A-2007-30877 Japanese Unexamined Patent Publication No. 2005-167378

A stay that supports a headrest in an automobile seat is generally composed of a pair of left and right metal shafts. The distance between the pair of shafts differs depending on the vehicle model, and the outer diameter of each shaft also differs depending on the vehicle model.
Therefore, in the fixing device shown in Patent Document 1, a thin metal plate curved so as to surround the shaft (stay) is used, and by tightening the metal plate with screws, it is fixed to the shaft even if the shaft diameter is different. It has been devised so that it can be done.
Further, in the fixing device shown in Patent Document 1, fixed bases provided with the above-mentioned thin metal plates are provided corresponding to a pair of shafts, and the fixing bases can be slid to each other by a horizontal arm. It has been devised so that it can correspond to the interval of.

On the other hand, the fixing device shown in Patent Document 2 is formed of a metal material, and has a through hole through which a shaft (stay) supporting a headrest is passed and a slitting groove communicating with the through hole to form a slitting groove. Bolts and nuts are provided to tighten the grooves.
Then, the left and right speakers are individually attached via fixing devices attached to the left and right stays by tightening the bolts and nuts.

By the way, according to the fixing device disclosed in Patent Documents 1 and 2, a tool is required to tighten a screw or a bolt and a nut. Therefore, the workability is poor, and the attachment of the fixing device varies depending on the tightening force applied by the installer (user), and sometimes excessive tightening causes problems such as damage to a part of the parts.

On the other hand, when the fixing device is to be used for mounting the speaker system, for example, the speaker system is moved up and down in the same manner according to the vertical adjustment of the headrest, that is, the speaker system is firmly placed directly under the headrest. It is desirable to configure it so that it is fixed. As a result, the speaker system can always be placed close to the seated person's head (ears) regardless of the vertical adjustment of the headrest.
In this case, when the fixing device is attached to the stay of the headrest, it can be attached smoothly with a relatively weak force, and after the attachment, the speaker system is firmly held so as not to be displaced with respect to the headrest. It is desirable that it is configured so that it can exert its power.

Therefore, the main problem to be solved by the present invention is that even if the shaft width and the shaft diameter are different, the shaft can be easily fixed without using a tool or the like, and the shaft such as a stay that supports the headrest can be fixed. The point is to provide a fixing device that can be smoothly attached. Further, it is an object of the present invention to provide a fixing device capable of effectively preventing the fixing device from moving in a direction of coming out of the shaft after mounting.

The shaft fixing device according to the present invention, which has been made to solve the above-mentioned problems, includes first and second chuck units having through holes inserted through the shafts arranged in parallel, respectively. The first and second chuck units have a body member to which the first and second chuck units are attached so that the distance between the first and second chuck units can be adjusted. The inside of the through hole is deformed by abutting on a part of the body member, and an elastic body is formed between the chuck body and the chuck body which is crimped and fixed to the outer peripheral surface of the shaft. A case body for accommodating is provided, and the elastic body applies an urging force so as to bring the chuck body into contact with a part of the body member.

In this case, it is desirable that the portion of the chuck body that comes into contact with a part of the body member is formed with an inclined surface having a predetermined acute angle with respect to the axis of the through hole.
In addition, an inclined surface having a predetermined acute angle with respect to the axial core of the through hole is also formed in a part of the body member with which the inclined surface formed on the chuck body comes into contact, and the inclination on the chuck body side. It is desirable that the surface and the inclined surface on the body member side are in surface contact with each other.

Then, in a preferred embodiment, the chuck body is divided into a plurality of parts along the axial core direction of the through hole and arranged in the case body, and the inclined surface is provided with respect to each of the plurality of divided chuck bodies. Is formed, and a configuration is adopted in which a plurality of divided chuck bodies are pressed and fixed to the outer peripheral surface of the shaft.

On the other hand, the body member is preferably composed of a first body member and a second body member that are mutually fitted, and the arrangement positions of the first and second chuck units in the first body member and the second body member. The first and second chuck units are attached so as to slide along the elongated holes, respectively, so that the distance between the first and second chuck units can be adjusted. It is configured to be possible.

In this case, in the state where the first and second chuck units are inserted into the respective shafts, the chuck body and the case body are affected by the urging force of the elastic body arranged between the chuck body and the case body. A function of bringing a part of the body member into contact with a part of the body member to prevent the chuck unit from sliding along the elongated hole of the body member and preventing the body member from moving relative to each shaft. Is desirable.

Then, a speaker is housed in the space formed by the first body member and the second body member, and a configuration in which the body member also serves as a speaker system can be preferably adopted.

According to the shaft fixing device according to the present invention, a chuck body is provided in which the inside of the through hole is deformed by abutting against a part of the body member and is crimped and fixed to the outer peripheral surface of the shaft. Then, since the chuck body is given an urging force that brings it into contact with a part of the body member by the elastic body, the chuck body can be firmly fixed to the shaft.

Further, since the chuck units provided with the chuck bodies are attached to the body members so that the distance between them can be adjusted, the body members can be stably fixed even if the shaft width and the shaft diameter are different. Further, it can be fixed to the shaft without the need for tools or the like.

It is a perspective view which shows the state which the fixing device is attached to the pair of shafts (stays) which support a headrest. It is an enlarged view of the part surrounded by the chain line C in FIG. It is a front view of the fixing device with the headrest facing down. It is an exploded perspective view which shows the example which adopted the fixing measure for a speaker system. It is a perspective view of the chuck unit provided in the fixing device. Similarly, it is a perspective view of the state where the chuck unit is broken at the central portion. It is a cross-sectional view seen in the direction of an arrow from the line aa in FIG. 3, (A) shows a state in which a fixing device is attached to a headrest, and (B) shows a state in which attachment is completed. (A) is an enlarged cross-sectional view of the portion surrounded by the chain line D in FIG. 7, and (B) is an enlarged cross-sectional view of the portion surrounded by the chain line E in FIG.

The fixing device to the shaft according to the present invention will be described based on an embodiment applied to fixing the speaker system. Note that this fixing device is attached using, for example, a pair of shafts (stays) arranged in parallel to support a headrest mounted on an automobile seat.
1 and 3 show a state in which the speaker system 1 also serving as a fixing device is attached to a pair of shafts (stays) S1 and S2 established on the headrest HL. The headrest HL shown in FIGS. 1 and 3 is shown in a state where it is removed from the seat and turned upside down, and the direction indicated by the arrow F is the front direction.

The fixing device (speaker system) 1 shown in the exploded perspective view in FIG. 4 is shown in a normal posture by being turned upside down with respect to the postures shown in FIGS. 1 and 3.
The outer shell of the fixing device 1 is composed of a body member 2 formed of a resin material, and the body member 2 has a flat shape as a whole when the first body member 2A and the second body member 2B are combined from above and below. Is formed in.

The second body member 2B is formed with rectangular recesses 3 on both sides in the longitudinal direction, and each of these recesses 3 has elongated holes 4 along the direction connecting the recesses 3. It is formed. That is, as shown in FIG. 3, the elongated hole 4 is formed along a line connecting the pair of shafts S1 and S2 in a state where the fixing device 1 is mounted.
Further, the first body member 2A fitted to the upper side of the second body member 2B is also formed with similar elongated holes 4 at positions facing the elongated holes 4 of the second body member 2B. The upper and lower elongated holes 4 formed in the first body member 2A and the second body member 2B, respectively, are for slidably attaching the chuck unit described later along the elongated holes 4.

As shown in FIG. 4, the first body member 2A is formed with a sound emitting grill 5 for attaching left and right speakers (not shown) to the back side. Therefore, the left and right speakers are referred to as the first body member 2A. The second body member 2B is housed in the space of the body member 2 which is vertically aligned. Further, a circuit board 6 is arranged in the body member 2, and a battery case 7 for storing a dry battery is placed on the circuit board 6. Further, the circuit board 6 is also mounted with a coiled conductive material 8 or the like that draws the operating current from the dry battery to the circuit board 6 side.
In this embodiment, in which the left and right speakers are provided in the body member 2, an in-vehicle infrared speaker system is configured, and an audio signal transmitted using infrared waves as a carrier wave is demodulated and amplified in the circuit board 6. It acts on the seated person to emit the reproduced sound of the speaker from directly below the headrest HL.

As shown in FIG. 4, the first and second chuck units 11 are arranged between the upper and lower elongated holes 4 facing the first body member 2A and the second body member 2B.
The chuck unit 11 has a chuck body 12 having a through hole 12a inserted through the shafts S1 and S2, and a coil located outside the chuck body 12 and functioning as an elastic body between the chuck body 12 and the chuck body 12. A case body 14 for accommodating the shaped spring 13 is provided.
The first and second chuck units 11 have the same configuration, and their assembled states are shown in FIGS. 5 and 6.

As shown in FIGS. 5 and 6, the chuck body 12 constituting the chuck unit 11 is divided into a plurality of parts along the axial core direction of the through hole 12a and arranged in the case body 14. In this embodiment, the chuck body 12 is divided into two parts. Then, a connecting portion 12b is formed on the chuck body 12 so as to extend outward, and as shown in FIG. 8, the connecting portion 12b is inclined having a predetermined acute angle with respect to the axis of the through hole 12a. The surface 12c is formed.
Further, the connecting portion 12b formed on the chuck body 12 and extending outward functions to receive one end of the spring 13 as the elastic body described above.

On the other hand, the outer case body 14 constituting the chuck unit 11 is formed with a guide portion 14a that slides along the elongated hole 4 formed in the second body member 2B as shown in FIG. .. A ring-shaped receiving portion 14b is formed inward from the guide portion 14a, and the ring-shaped receiving portion 14b receives the other end of the spring 13 as the elastic body.
As a result, by the action of the spring 13, the chuck body 12 and the outer case body 14 are given an urging force in the direction of being expanded along the axial core direction of the through hole 12a.

Further, as shown in FIG. 8, the first body member 2A is formed with an inclined surface 16 that abuts on the inclined surface 12c formed on the chuck body 12.
The inclined surface 16 is also made to have the same angle as the inclined surface 12c of the chuck body 12, whereby the inclined surface 12c on the chuck body 12 side and the inclined surface 16 on the first body member 2A side are formed. Is configured to be in surface contact with.
As shown in FIGS. 2 and 8, a flange portion 12d is formed at an end portion of the chuck body 12 divided into a plurality (two), and the flange portion 12d will be described later. The fixing device 1 mounted on the pair of shafts S1 and S2 can be used when pulling out from the shafts S1 and S2.

7 and 8 show a state of attachment / detachment between one chuck unit 11 of the fixing device (speaker system) 1 and one shaft S1 that supports the headrest, but between the other shaft S2. The attachment / detachment is the same as the following description.
FIG. 7A shows a state in which the fixing device (speaker system) 1 is attached to the headrest, and preferably, as shown in the figure, the headrest HL is inverted upside down to support the headrest. The fixing device 1 is attached in a state where S1 is turned upward.

In this case, as shown by enlarging the main part in FIG. 8A, the operation of inserting the through hole 12a of the chuck body 12 in the chuck unit 11 into the shaft S1 and pushing the fixing device 1 downward is performed. Be done. The arrow a shown in FIG. 8A indicates the direction in which the shaft S1 is inserted relative to the through hole 12a of the chuck body 12.
In this state, the chuck body 12 receives an urging force in the direction of arrow b by the action of the elastic body (spring) 13. However, due to the friction between the through hole 12a of the chuck body 12 and the shaft S1, the chuck body 12 acts so as to be dragged relatively upward with respect to the body member 2 as shown in 8 (A).

Therefore, the urging force that the inclined surface 12c of the chuck body 12 abuts on the inclined surface 16 on the first body member 2A side is weakened as shown by the arrow c. As a result, the friction between the shaft S1 and the chuck body 12 is reduced (arrow d) so that the wedge can be removed. Therefore, the fixing device 1 can be mounted toward the headrest HL side with almost no resistance.

On the other hand, according to the state shown in FIG. 7 (B) in which the fixing device (speaker system) 1 is mounted directly under the headrest HL, the fixing device (speaker system) 1 is mounted on the chuck unit 11 as shown by enlarging the main part in FIG. 8 (B). Due to the urging force of the elastic body (spring) 13, the chuck body 12 receives the urging force in the direction of arrow b. As a result, the inclined surface 12c of the chuck body 12 is joined to the inclined surface 16 on the first body member 2A side by the force indicated by the arrow c, as if a wedge was inserted.
Therefore, the force at which the inclined surface 12c joins the inclined surface 16 at this time is larger than that shown in FIG. 8 (A).

As a result, the through holes 12a formed by the two chuck bodies 12 arranged on both sides of the shaft S1 are deformed inward by receiving the force indicated by the arrow d, and the shaft S1 is sandwiched (chucked) by the pair of chuck bodies 12. Be made into a state. Therefore, the fixing device 1 can be kept firmly fixed to the shaft S1 directly under the headrest HL.
Therefore, for example, according to the vertical adjustment of the headrest HL, the speaker system 1 also serving as a fixing device also moves up and down in the same manner, and the speaker system is always placed close to the seated person's head (ears). can do.

In this way, in the state shown in FIG. 7B in which the first and second chuck units 11 are inserted into the shafts S1 and S2, the chuck body 12 and the case body 14 constituting the chuck unit 11 are in contact with each other. In response to the urging force of the spring 13 arranged between them, the inclined surface 12c of the chuck body 12 comes into contact with the inclined surface 16 of the first body member 2A, and a frictional force is generated between the two. Further, in response to the urging force of the spring 13, a part of the case body 14 comes into surface contact with the second body member 2B, and a frictional force is generated between the two.
The frictional force generated at these two locations can prevent the chuck unit 11 from sliding along the elongated hole 4 of the body member 2. As a result, when the first and second chuck units are inserted into the respective shafts, the body member 2 is prevented from moving (shifting) relative to the respective shafts S1 and S2. Can be done.

The flange portion 12d provided on the chuck body 12 is located in the recessed portion 3 of the second body member 2B, as shown in an enlarged manner in FIG. This can be used when the fixing device 1 is pulled out from the headrest HL side.
That is, when the pair of flange portions 12d are picked up with a fingertip and pulled out in the axial direction of the shaft S1, the inclined surface 12c on the chuck body 12 side and the inclined surface 16 on the first body member 2A side shown in FIG. 8B are obtained. The joint is loose. Therefore, since the chuck to the shaft S1 by the pair of chuck bodies 12 is slightly loosened, the fixing device 1 can be relatively easily detached from the shaft S1.

As described above, according to the shaft fixing device according to the present invention, even if the shaft width and the shaft diameter are different, it can be easily fixed without using a tool or the like. Further, in the column of the effect of the above-mentioned invention, it is possible to provide a fixing device that can be smoothly mounted on the shaft and that can effectively prevent the shaft from moving in the axial direction after mounting. The described effects can be obtained.

In the embodiment described above, the chuck body 12 constituting the chuck unit 11 is divided into two along the axial core direction of the through hole 12a, but this is three or more. A configuration divided into two can also be adopted.
Further, in the embodiment, a coil-shaped spring is used as the elastic body 13 arranged in the chuck unit 11, but instead of this, a configuration using, for example, a rubber material or a sponge can be adopted. ..

Further, the embodiment described above shows an example in which a speaker system is attached by using a shaft (stay) that supports the headrest, but the fixing device to the shaft according to the present invention is a shaft that supports the headrest. Other than that, it can be installed. Further, it can be used for attaching a TV monitor other than the speaker system and other adherends, and the same effect can be obtained.

1 Fixing device (speaker system)
2 Body member 2A 1st body member 2B 2nd body member 3 Recessed part 4 Long hole 5 Sound emitting grill 6 Circuit board 7 Battery case 8 Coiled conductive material 11 Chuck unit 12 Chuck body 12a Through hole 12b Connecting part 12c Inclined surface 12d Grill 13 Elastic body (spring)
14 Case body 14a Guide part 14b Receiving part 16 Inclined surface HL Headrest S1, S2 Shaft (stay)

Claims (7)

The distance between the first and second chuck units having through holes inserted through the shafts arranged in parallel and the first and second chuck units can be adjusted so as to be adjustable. It has a body member to which the first and second chuck units are attached, respectively.
The first and second chuck units are
A chuck body in which the inside of the through hole is deformed by abutting on a part of the body member and is crimped and fixed to the outer peripheral surface of the shaft.
A case body for accommodating an elastic body is provided between the chuck body and the chuck body.
A fixing device to a shaft, characterized in that the elastic body applies an urging force so as to bring the chuck body into contact with a part of the body member. The shaft according to claim 1, wherein an inclined surface having a predetermined acute angle with respect to the axis of the through hole is formed in a portion of the chuck body that comes into contact with a part of the body member. Fixing device to. An inclined surface having a predetermined acute angle with respect to the axis of the through hole is also formed in a part of the body member with which the inclined surface formed on the chuck body comes into contact with the inclined surface on the chuck body side. The fixing device to a shaft according to claim 2, wherein the inclined surface on the body member side is in surface contact with the inclined surface. The chuck body is divided into a plurality of parts along the axial core direction of the through hole and arranged in the case body, and the inclined surface is formed and divided for each of the plurality of divided chuck bodies. The fixing device to the shaft according to claim 2 or 3, wherein a plurality of chuck bodies are pressed against the outer peripheral surface of the shaft and fixed to the shaft. The body member is composed of a first body member and a second body member that are fitted to each other, and the positions of the first and second chuck units in the first body member and the second body member are long. Holes are formed respectively, and by attaching the first and second chuck units so as to slide along the elongated holes, the distance between the first and second chuck units can be adjusted. The fixing device to the shaft according to any one of claims 1 to 4, wherein the device is configured according to the above. In a state where the first and second chuck units are inserted through the respective shafts,
By the urging force of the elastic body arranged between the chuck body and the case body, the chuck body and a part of the case body are brought into contact with each part of the body member, and along the elongated hole of the body member. Prevents the sliding operation of the chuck unit
The fixing device to a shaft according to claim 5, wherein the relative movement of the body member with respect to each shaft is prevented. The shaft according to claim 5 or 6, wherein the speaker is housed in a space formed by the first body member and the second body member, and the body member also serves as a speaker system. Fixing device to.

Images