JP2010011193A - Vibration absorption structure and display device comprising the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration absorption structure, capable of decreasing the transmission of vibration generated by a speaker through from an elastic cylinder body to an axis part, without making the diameter of the elastic cylinder body large, and to provide a display device. <P>SOLUTION: A through-hole 33 provided to a part with a speaker fixed has contact parts 33a, 33a with the elastic cylinder 5 and circumferential surface contacted and a convex part 33b continued to the contact parts 33a, 33a and directed to its center axis. While providing a restraining concave part 5c contacting to the convex part 33b and for restraining a relative movement, in an axis longitudinal direction to the elastic cylinder 5, relatively thickening an absorption part thickness H1 between the contact part 33a, 33a of the through-hole 33 and an inner circumference surface of the elastic cylinder 5 can decrease the transmission of the vibration generated by the speaker to a speaker support part 21c via from the elastic cylinder body 5 to the axis part 23, making it possible to reduce the microvibration of the cabinet continued to the speaker support part 21c. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vibration absorbing structure that absorbs vibration generated by a device, and a display device that can absorb vibration generated by a speaker by the vibration absorbing structure.

As a vibration absorbing structure that absorbs vibration generated by a device such as a speaker, a plurality of shaft portions are provided inside a cabinet that covers the rear side of the display device body having a display surface on the front side, and a through hole corresponding to the shaft portion Is provided in the outer periphery of the speaker, and has an annular groove in the outer peripheral portion into which the attached portion is closely fitted, so that the peripheral surfaces are in contact with the shaft portion. The rubber elastic cylinder is provided so that the vibration generated by the speaker is absorbed by the elastic cylinder (see, for example, Patent Document 1).
JP 2004-187271 A

  FIG. 7 is an explanatory view of the vibration absorbing structure described in Patent Document 1. FIG. In this vibration absorbing structure, when the speaker mounting portion 102 is closely fitted in an annular groove 101 provided on the outer peripheral surface of the elastic cylindrical body 100, the mounting portion 102 moves in the axial length direction. Since the elastic cylinder 100 absorbs the vibration generated by the speaker, the vibration generated by the speaker is opened in the attached portion 102 when the vibration generated by the speaker is transmitted to the elastic cylinder 100. It is transmitted from the peripheral surface of the through hole 103 to the thick portion H between the annular groove 101 in the elastic cylindrical body 100 and the inner peripheral surface 104 of the elastic cylindrical body 100, and transmitted from the thick portion H to the shaft portion 105. Thus, the vibration transmitted to the elastic cylinder 100 is easily transmitted from the elastic cylinder 100 to the shaft portion 105. Therefore, in the low sound range of the speaker, the vibration transmitted to the elastic cylinder 100 is transmitted from the shaft portion 105 to the cabinet 106, the cabinet 106 slightly vibrates, and an abnormal sound (billing sound) due to the minute vibration of the cabinet 106 is generated. ) Would occur, and improvement measures were desired. FIG. 8 is a graph in which the vibration value on the front surface of the cabinet due to frequency change is actually measured. In the vibration absorbing structure shown in FIG. 7, the maximum vibration value in the low sound range is about 3.60 mm / s.

  The present invention has been made in view of such circumstances, and a main object thereof is to connect a through-hole formed in the attached portion to a contact portion where the elastic cylindrical body and the peripheral surface are in contact with each other, and the contact portion, and a center thereof. It has a configuration having a convex portion directed to the shaft, and by providing a restriction recess in the elastic cylinder that contacts the convex portion and restricts relative movement in the axial length direction, the elastic cylinder can be penetrated without increasing the diameter. The thick part between the contact part of the hole and the inner peripheral surface of the elastic cylinder can be made relatively thick, and the vibration generated by the supported object can be transmitted from the elastic cylinder to the support through the shaft part. An object of the present invention is to provide a vibration absorbing structure and a display device that can be reduced.

  In the vibration absorbing structure according to the present invention, a supported object supported by a support body having a shaft portion has a mounted portion in which a through hole is opened, and is fitted into the through hole, and the shaft portion is inside. In the vibration absorbing structure that absorbs the vibration generated by the supported object around the elastic cylinder, and the through hole is a contact where the elastic cylinder and the peripheral surface are in contact with each other And a convex part directed to the central axis thereof, and the elastic cylindrical body has a regulation recess that contacts the convex part and regulates relative movement in the axial direction. To do.

  In the present invention, the thickness of the vibration absorbing portion between the contact portion of the through hole and the inner peripheral surface of the elastic cylindrical body can be relatively increased without increasing the diameter of the elastic cylindrical body. Therefore, the vibration generated by the supported object can be reduced from being transmitted from the elastic cylindrical body to the support through the shaft portion, and the fine vibration of the support can be reduced.

Further, the vibration absorbing structure according to the present invention is configured such that the convex portion is arranged in an intermediate portion in the axial length direction of the through hole, and the contact portion is arranged on both sides of the convex portion. preferable.
In this invention, the vibration generated by the supported object can be transmitted from both edge sides of the through-hole to the elastic cylinder, and can be absorbed by the entire elastic cylinder, so the vibration transmitted to the elastic cylinder Can be absorbed more easily, and the fine vibration of the support can be further reduced.

In the vibration absorbing structure according to the present invention, it is preferable that the convex portion is arranged in a circumferential direction of the through hole, and the restriction recess is an annular shape having a smaller diameter than the convex portion.
In the present invention, the vibration generated by the supported object is hardly transmitted from the convex portion of the through hole to the elastic cylinder, and the vibration transmitted to the elastic cylinder is transmitted from the contact portion to the elastic cylinder. It is easier to absorb and the fine vibration of the support can be further reduced. In addition, the elastic cylinder can be easily inserted into the through hole, the workability of assembling can be improved, and the elastic cylinder can be held in the through hole.

Further, in the vibration absorbing structure according to the present invention, the elastic cylindrical body has a first split body and a second split section that are spaced apart in the axial length direction of the shaft portion, the first split body and It is preferable that the space between the second halves is the restriction recess.
In this invention, since the regulation recess of the elastic cylinder is arranged over the inner peripheral surface, the elastic cylinder can be made small, and the cost of the elastic cylinder, and hence the cost of the vibration absorbing structure can be reduced. .

  In addition, a display device according to the present invention includes a display unit having a display surface on the front side, a cabinet that covers a peripheral portion and a rear side of the display unit and includes a speaker support unit that constitutes the support, and an interior of the cabinet. The speaker is supported by the speaker support portion and constitutes the supported object, and the vibration absorbing structure of the invention described above that absorbs vibration of the speaker.

  In the present invention, the thickness of the vibration absorbing portion between the contact portion of the through hole and the inner peripheral surface of the elastic cylindrical body can be relatively increased without increasing the diameter of the elastic cylindrical body. Therefore, it is possible to reduce the vibration generated by the speaker from being transmitted from the elastic cylindrical body to the cabinet through the shaft portion, and to reduce the fine vibration of the cabinet.

  According to the present invention, the thickness of the absorbing portion between the contact portion of the through hole and the inner peripheral surface of the elastic cylindrical body can be relatively increased without increasing the diameter of the elastic cylindrical body, and a supported object is generated. The vibration can be reduced from being transmitted from the elastic cylinder through the shaft portion to the support, and the fine vibration of the support can be reduced.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
Embodiment 1
FIG. 1 is a perspective view showing a configuration of a display device according to the present invention, FIG. 2 is a longitudinal side view with a part omitted showing the configuration of the display device, and FIG. 3 is a perspective view showing a configuration of a speaker.

  The display device shown in the figure has a display surface 1a for displaying a television image on the front side, a display unit 1 having a substantially rectangular parallelepiped shape, a cabinet 2 covering the peripheral edge and the rear side of the display unit 1, and the cabinet 2 Two speakers 3 arranged on both sides in the lateral direction below the display unit 1, a vibration absorbing structure A that supports the speakers 3 on the cabinet 2, and a stand 4 that supports the display unit 1 in an upright state. It is a thin LCD television. In addition, the display part 1 and the cabinet 2 comprise the support body which supports the speaker 3 as a to-be-supported body.

  The display unit 1 includes a liquid crystal display panel 11 having a display surface 1a on the front side, and an optical sheet 12, a light source 13, and a television board such as a power supply board disposed on the rear side of the display panel 11. The light source 13 includes a plurality of lamps and a case that accommodates and supports the lamps.

  The cabinet 2 is made of a synthetic resin having a cabinet front part 21 that covers the outer periphery of the display panel 11 and the front side of the speaker 3, and a cabinet rear part 22 that covers the rear side of the light source 13 and the speaker 3. The peripheral portions of the front segment 21 and the cabinet rear segment 22 are attached to the case of the light source 13 by a plurality of male screws.

  The cabinet front body 21 has a ring plate portion 21a and a rectangular tube portion 21b extending rearward from the periphery of the ring plate portion 21a, and a speaker for supporting the speaker 3 below the ring plate portion 21a. A support portion 21c is provided.

  The speaker support portion 21 c is integrally provided with a plurality of cylindrical shaft portions 23 extending rearward so as to correspond to the outer peripheral portion of the speaker 3. The speaker support portion 21c is provided with a plurality of sound emission holes for outputting sound to the outside.

  A plurality of ribs 23a protrude from the base portion of the shaft portion 23 in the circumferential direction, and the end surfaces of the ribs 23a serve as receiving portions 23b.

  The cabinet rear body 22 has a deep dish shape.

  The speaker 3 holds the sound source for the low sound, the sound source for the middle / high sound, and the sound sources side by side, and the low sound generated by one sound source and the medium / high sound generated by the other sound source. And a holding case 31 having a sound output portion for discharging the sound forward, and a peripheral portion of the holding case 31 is supported by the shaft portion 23 of the cabinet front body 21 by the vibration absorbing structure A. A plurality of attached portions 32 are integrally provided on the peripheral portion of the holding case 31. The attached portion 32 has a plate shape, and a through hole 33 having a diameter larger than that of the shaft portion 23 is formed in the attached portion 32.

  FIG. 4 is an enlarged cross-sectional view showing the configuration of the vibration absorbing structure A. The vibration absorbing structure A includes a shaft part 23 of the cabinet front part 21, a rubber elastic cylinder 5 having a hole 5 a into which the shaft part 23 is inserted, and a through-hole 33 into which the elastic cylinder 5 is inserted. And a male screw 6 that fixes the elastic cylinder 5 to the shaft portion 23.

  The elastic cylindrical body 5 has a cylindrical shape having a hole 5a having substantially the same diameter as that of the shaft portion 23, contacted portions 5b and 5b are provided on both edge sides of the outer peripheral surface, and an annular regulating recess is provided between the contacted portions 5b and 5b. 5c is provided. The regulation recess 5c is formed to have a smaller diameter than the contacted parts 5b and 5b, and is arranged in the central part in the axial length direction.

  The through-hole 33 is connected to the contact portions 33a and 33a that contact the contacted portions 5b and 5b of the elastic cylindrical body 5 and the contact portions 33a and 33a between the contact portions 33a and 33a, and has an annular shape toward the central axis. It has the convex part 33b. The inner peripheral surface of the convex portion 33b is formed to have a larger diameter than the peripheral surface of the restriction recess 5c, and a space between the peripheral surfaces of the convex portion 33b and the restriction recess 5c is a non-contact space.

  The periphery of the through hole 33 of the attached portion 32 is formed thicker than the thickness of the attached portion 32, and the length of the through hole 33 in the axial length direction is slightly shorter than the length of the elastic cylinder 5. Is formed. Further, the attached portion 32 is provided with a slit 33c for opening one side of the through hole 33 to the outside so that the restriction recess 5c of the elastic cylinder 5 can be fitted into the through hole 33 from the slit 33c. It is configured.

  In the display device configured as described above, the elastic cylinder 5 is inserted into the through hole 33 of the attached portion 32 of the speaker 3, and the elastic cylinder 5 is held in the through hole 33 in advance. At this time, the contact portions 33a and 33a of the through-hole 33 are in contact with the contacted portions 5b and 5b of the elastic cylinder 5, the convex portion 33b is opposed to the restriction recess 5c, and the space between the protrusion 33b and the restriction recess 5c is It becomes a non-contact space. And after attaching the cabinet front part 21 to the display part 1, the elastic cylinder 5 is inserted in the axial part 23 protrudingly provided by the speaker support part 21c of the cabinet front part 21, and the speaker 3 is made into a shaft part. After being supported by 23, the speaker 3 can be elastically attached by screwing the male screw 6 made of a tapping screw into the hole of the shaft portion 23 through the central hole provided in the washer 7.

  FIG. 5 is a graph in which the vibration value on the front surface of the cabinet due to frequency change is actually measured. In this way, the vibration absorbing structure A for attaching the speaker 3 has the contact portions 33a and 33a on both edge sides of the through hole 33. The contact portions 33a and 33a are in contact with the outer peripheral surface of the elastic cylinder 5, and Since the convex portion 33b and the regulation recess 5c are in a non-contact space, the vibration generated by the speaker 3 is changed from the contact portions 33a and 33a of the through-hole 33 to the contacted portion 5b, as indicated by arrows in FIG. 5b is transmitted from the inner peripheral surface of the elastic cylinder 5 to the shaft portion 23. At this time, the vibration absorbing portion thickness H1 between the contact portions 33a, 33a and the inner peripheral surface of the elastic cylindrical body 5 is relatively thick, so that the vibration transmitted to the elastic cylindrical body 5 can be easily absorbed. Therefore, the vibration transmitted from the elastic cylinder 5 to the shaft part 23 in the low sound range can be reduced, and the fine vibration of the cabinet 2 including the cabinet front body 21 can be reduced. Incidentally, in the conventional vibration absorbing structure shown in FIG. 7, the maximum vibration value in the low frequency range is about 3.60 mm / s as shown in FIG. In A, the maximum vibration value in the low sound range is about 2.57 mm / s as shown in FIG. 5, and the maximum vibration value in the low sound range can be reduced by about 30%. Moreover, since the convex part 33b of the through-hole 33 is in contact with the restriction recess 5c and the convex part 33b is restricted from moving in the axial length direction, the speaker 3 is stably supported by the elastic cylindrical body 5. Can do.

Embodiment 2
FIG. 6 is a longitudinal sectional view showing another configuration of the vibration absorbing structure A. In this vibration absorbing structure A, the elastic cylinder 5 is divided into a first split 51 and a second split 52 that are spaced apart from each other in the axial direction of the shaft portion 23. The space between the two halves 52 is a restriction recess 5c that contacts the convex portion 33b.

  The first part 51 and the second part 52 have a disk shape having a hole 5a having substantially the same diameter as the shaft part 23, and the outer peripheral surfaces of the first part 51 and the second part 52 are the contacted parts 5b, 5b, and between the opposing side surfaces of the first split body 51 and the second split body 52 is a restriction recess 5c.

  The convex portion 33b of the through hole 33 is in contact with the opposing side surfaces of the first and second bodies 51 and 52, and movement in the axial length direction is restricted.

  In the display device configured as described above, after the cabinet front part 21 is attached to the display unit 1, the first part is formed on the shaft part 23 protruding from the speaker support part 21 c of the cabinet front part 21. 51 is inserted and supported, and the shaft portion 23 is inserted into the through-hole 33 of the attached portion 32 of the speaker 3, and then the second segment 52 is inserted into the shaft portion 23 and the speaker 3 is supported by the shaft portion 23. The speaker 3 can be elastically attached by screwing the male screw 6 made of a tapping screw into the hole of the shaft portion 23 through the central hole provided in the washer 7.

  As described above, in the vibration absorbing structure A for attaching the speaker 3, the absorber 5 is divided into the first part 51 and the second part 52, and the contact parts 33 a and 33 a of the through hole 33 are the first part 51 and the second part 51. The vibration generated by the speaker 3 because it is in contact with the outer peripheral surface (contacted parts 5b, 5b) of the split body 52 and the space between the first split body 51 and the second split body 52 is a restriction recess 5c. As shown by an arrow in FIG. 6, the first body 51 passes from the contact portions 33 a and 33 a of the through-hole 33 through the outer periphery of the first body 51 and the second body 52 (contacted portions 5 b and 5 b). The vibration is transmitted from the inner peripheral surface of the second split body 52 to the shaft portion 23, and no vibration is transmitted from the restriction recess 5 c between the first split body 51 and the second split body 52 to the shaft portion 23. At this time, the vibration absorbing portion thickness H1 between the contact portions 33a, 33a and the inner peripheral surface of the elastic cylindrical body 5 is relatively thick, so that the vibration transmitted to the elastic cylindrical body 5 can be easily absorbed. Therefore, the vibration transmitted from the elastic cylinder 5 to the shaft portion 23 can be reduced, and the fine vibration of the cabinet 2 including the cabinet front part 21 can be reduced.

  In the embodiment described above, the vibration absorbing structure A that absorbs the vibration generated by the speaker 3 as the supported object has been described. However, the vibration absorbing structure A according to the present invention is, for example, in the display unit 1. It is also possible to absorb the vibration generated by the cooling fan mounted on the rear surface of the case, and the target of the supported object is not particularly limited.

  In the embodiment described above, the convex portion is annular and the restriction recess is annular. However, the convex portion and the restriction recess may be configured in an arc shape, or a plurality of circumferential positions. It is good also as a structure distribute | arranged to.

  Further, the vibration absorbing structure A according to the present invention may be used for a device other than the display device in addition to the display device.

  The display device according to the present invention may be a liquid crystal display device such as a liquid crystal television, or a display device such as a plasma display device or an EL display.

It is a perspective view which shows the structure of the display apparatus which concerns on this invention. It is the vertical side view which abbreviate | omitted one part which shows the structure of the display apparatus which concerns on this invention. It is a perspective view which shows the structure of the speaker of the display apparatus which concerns on this invention. It is an expanded sectional view showing the composition of the vibration absorption structure concerning the present invention. It is the graph which measured the vibration value of the cabinet front by a frequency change. It is a longitudinal cross-sectional view which shows the other structure of the vibrational absorption structure which concerns on this invention. It is explanatory drawing which shows the structure of the vibrational absorption structure described in patent document 1. FIG. It is the graph which measured the vibration value of the cabinet front by a frequency change.

Explanation of symbols

A Vibration absorption structure 1 Display 2 Cabinet (support)
21c Speaker support part 23 Shaft part 3 Speaker 32 Mounted part 33 Through-hole 33b Protrusion part 5 Elastic cylinder 5b Contact part 5c Restriction recess 51 1st division 52 2nd division

Claims (5)

  An object to be supported, which is supported by a support having a shaft portion, has a mounted portion having a through hole, and is provided with an elastic cylinder that is fitted into the through hole and into which the shaft portion is fitted. In the vibration absorbing structure that absorbs vibration generated by the supported object around the elastic cylinder, the through hole is connected to the contact portion where the elastic cylinder and the peripheral surface are in contact with each other, and the contact portion. A vibration absorbing structure having a convex portion directed toward a central axis, wherein the elastic cylindrical body has a regulation recess that contacts the convex portion and regulates relative movement in the axial length direction.   The vibration absorbing structure according to claim 1, wherein the convex portion is disposed in an intermediate portion of the through hole in the axial length direction, and the contact portion is disposed on both sides of the convex portion.   The vibration absorbing structure according to claim 1, wherein the convex portion is arranged in a circumferential direction of the through hole, and the restriction recess is an annular shape having a smaller diameter than the convex portion.   The elastic cylindrical body has a first split body and a second split body that are spaced apart in the axial length direction of the shaft portion, and the space between the first split body and the second split body is the restriction recess. The vibration absorbing structure according to claim 1.   A display unit having a display surface on the front side, a cabinet having a speaker support unit that covers the peripheral edge and the rear side of the display unit and that constitutes the support, and is supported by the speaker support unit in the cabinet, A display device comprising: a speaker constituting a supported object; and the vibration absorbing structure according to claim 1 that absorbs vibration of the speaker.

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