JP2008261413A - Male screw for fixing vibration suppressing body and display device including the same - Google Patents

Abstract

Provided is a male screw 1 for fixing a vibration suppression body 2 that can accurately determine the fixing position of the vibration suppression body 2 and can eliminate damage due to rubbing of the vibration suppression body 2.
A male screw 1 for attaching a vibration suppressing body 2 having a penetrating circular hole 21 to a support body 3 having a screw hole 31 is connected to a screw portion 11 screwed into the screw hole 31 and the screw. An intermediate shaft portion 13 that is continuous with the portion 11 and is thicker than the screw portion 11 and is in contact with the inner peripheral surface of the circular hole 21, and a head portion 15 that is continuous with the intermediate shaft portion 13 and is thicker than the intermediate shaft portion 13. And the outer periphery of the intermediate shaft portion 13 is provided with a recess to reduce the contact area with the inner peripheral surface of the circular hole 21, and the intermediate shaft portion 13 is in contact with the inner peripheral surface of the circular hole 21. The resistance can be reduced.
[Selection] Figure 2

Description

  The present invention suppresses vibration of an exhaust fan by a male screw for fixing a vibration suppressing body that suppresses vibration generated by an apparatus or vibration received by the apparatus to a support body on which the apparatus is supported, and the vibration suppressing body. The present invention relates to a display device.

  As a means for suppressing the vibration generated by the device and the vibration received by the device, a cylindrical rubber vibration suppression body is used. A fixing structure for fixing the vibration suppressing body to the support body on which the device is supported is inserted into the through hole of the vibration suppressing body, and a sleeve that regulates the amount of bending of the vibration suppressing body, and is inserted into the sleeve. And a bolt that is screwed into a screw hole provided in the support, and the vibration suppression body is fixed to the support by tightening the bolt into the screw hole (see, for example, Patent Document 1). .

  FIG. 20 is a perspective view showing a configuration of a conventional male screw for fixing a vibration suppressing body, and FIG. 21 is a cross-sectional view showing a fixing structure of the vibration suppressing body. This fixing structure includes a screw portion 101 that is screwed into a screw hole 201 provided in a support body 200 that supports the device, and is connected to the screw portion 101, is thicker than the screw portion 101, and has a vibration suppressing body 300. A bolt 100 having an intermediate shaft portion 102 that is in contact with the inner peripheral surface of the through hole 301 and a head portion 103 that is continuous with the intermediate shaft portion 102 and is thicker than the intermediate shaft portion 102 is provided. And the intermediate shaft portion 102 is in contact with the inner peripheral surface of the through-hole 301 so that the fixing position of the vibration suppressing body 300 and the supporting position of the device are determined.

A display device such as a thin television includes a display unit having a display surface for displaying an image on the front side, a cabinet that has an intake port on the lower side and an exhaust port on the upper side, and covers the rear side of the display unit, And an exhaust fan disposed in the cabinet, and the air sucked into the cabinet from the lower intake port by the drive of the exhaust fan is discharged to the outside from the upper exhaust port, thereby suppressing the temperature rise in the cabinet. (For example, refer patent document 2).
JP 2001-159406 A JP 2006-58679 A

  However, in the fixing structure for fixing the vibration suppression body using the sleeve and the bolt as described in Patent Document 1, the sleeve and the bolt are necessary. Improvement measures have been requested in terms of fixed workability.

  Further, in the fixing structure shown in FIG. 21, the intermediate shaft portion of the bolt comes into contact with the inner peripheral surface of the through hole of the rubber vibration suppressing body, and the fixing position of the vibration suppressing body, and thus the support position of the device is accurately determined. Therefore, when the screw portion of the bolt is tightened into the screw hole of the support body, the rotation of the bolt is transmitted to the vibration suppressing body due to the contact resistance between the intermediate shaft portion and the inner peripheral surface of the through hole. The vibration suppressing body rotates together, and the contact end surface of the vibration suppressing body with the support is rubbed. The vibration suppressing body is deformed by the rubbing of the contact end face and is broken to generate debris, and an improvement measure has been demanded.

  As an improvement measure, it is conceivable to reduce the contact resistance between the intermediate shaft portion and the inner peripheral surface of the through hole by coating the vibration suppressing body with a lubricant such as fluorine or silicon. However, since silicon-based lubricants generate siloxane, they have an adverse effect on electrical and electronic components. Also, the lubricant attached to the fingers during assembly work adheres to other components and contaminates other components. In addition, since an extra lubricant is necessary, the cost is increased, which is not a preferable improvement measure.

  The present invention has been made in view of such circumstances, and the main object is to provide a contact area with the inner peripheral surface of the circular hole on the outer periphery of the intermediate shaft portion that contacts the inner peripheral surface of the circular hole of the vibration suppressing body. By providing the recess to be reduced, the contact resistance with the inner peripheral surface of the circular hole of the intermediate shaft portion can be reduced, and the vibration suppressor can be prevented from rotating together when the male screw is tightened, It is an object of the present invention to provide a male screw for fixing a vibration suppressing body that can eliminate damage due to rubbing of the suppressing body.

  Another object of the present invention is to suppress vibration that can reduce the cost by forming the intermediate shaft part of the male screw into a truncated cone shape with a small diameter on the screw part side, which can be processed in the existing male screw processing process. The object is to provide a male screw for body fixation.

  Another object of the present invention is to form an intermediate shaft portion of the male screw in a prismatic shape, so that it can be processed in the existing male screw processing step, and the male for fixing the vibration suppression body can be reduced in cost. To provide a screw.

  Another object is to provide a display unit having a display surface on the front side, a cabinet that covers the rear side of the display unit, an exhaust fan disposed in the cabinet, and a vibration suppressor that suppresses vibration of the exhaust fan. And the above-described male screw for attaching the vibration suppression body to the display unit, the exhaust fan can be supported at an appropriate support position, and the vibration suppression body can be prevented from being damaged by rubbing. An object of the present invention is to provide a display device that can perform the above-described operation.

  A male screw for fixing a vibration suppression body according to the present invention is a male screw for attaching a vibration suppression body having a circular hole therethrough to a support having a screw hole, and a screw portion screwed into the screw hole; An intermediate shaft portion that is continuous with the screw portion, is thicker than the screw portion, and is in contact with the inner peripheral surface of the circular hole; and a head portion that is continuous with the intermediate shaft portion and is thicker than the intermediate shaft portion; The outer periphery of the part is provided with a recess that should reduce the contact area with the inner peripheral surface of the circular hole.

  In this invention, the intermediate shaft portion is fitted into the circular hole of the vibration suppression body, and the screw portion is tightened into the screw hole of the support body, whereby the front end surface of the intermediate shaft portion comes into contact with the support body and vibration suppression is performed. The amount of bending of the body can be regulated, and the support position of the device with respect to the screw hole can be accurately determined. Since the male screw has a small contact area with the inner peripheral surface of the circular hole due to the recess provided on the outer periphery of the intermediate shaft portion, and the contact resistance with the inner peripheral surface of the circular hole is reduced, the male screw is tightened. It is possible to prevent the vibration suppressing body from co-rotating when being inserted, and it is possible to eliminate damage due to rubbing of the vibration suppressing body.

  The male screw for fixing a vibration suppressing body according to the present invention is characterized in that the intermediate shaft portion is formed in a truncated cone shape having a small diameter on the screw portion side.

  In this invention, since it can be processed by an existing male screw processing step, the cost of the male screw can be reduced.

  The male screw for fixing a vibration suppressing body according to the present invention is characterized in that the intermediate shaft portion is formed in a prismatic shape.

  In this invention, since it can be processed by an existing male screw processing step, the cost of the male screw can be reduced.

  The display device according to the present invention suppresses vibration of the display unit having a display surface on the front side, a cabinet covering the rear side of the display unit, an exhaust fan disposed in the cabinet, and the exhaust fan. And a male screw according to the above-described invention for fixing the vibration suppressor to the display unit.

  According to the present invention, vibration generated by the exhaust fan disposed in the cabinet can be suppressed by the vibration suppressing body, and the amount of deflection of the vibration suppressing body can be controlled by tightening the male screw. At the same time, by tightening the male screw, the exhaust fan can be supported at an appropriate support position, and damage to the vibration suppressing body due to rubbing can be prevented.

  According to the present invention, it is possible to accurately determine the fixing position of the vibration suppressing body by contact with the inner peripheral surface of the circular hole, and thus the support position to the support body of the device, and the intermediate shaft section. Since the contact area with the inner peripheral surface of the circular hole can be reduced and the contact resistance with the inner peripheral surface of the circular hole of the intermediate shaft portion can be reduced, the vibration suppressing body is shared when the male screw is tightened. Rotation can be suppressed, and damage due to rubbing of the vibration suppressing body can be prevented.

  In addition, according to the present invention, since it can be processed in the existing male screw processing step, the cost of the male screw can be reduced.

  Further, according to the present invention, the vibration generated by the exhaust fan disposed in the cabinet can be suppressed by the vibration suppressing body, and the exhaust fan is accurately supported at the support position by tightening the male screw. In addition, the vibration suppressor can be prevented from being damaged by rubbing.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
Embodiment 1
FIG. 1 shows the configuration of a male screw for fixing a vibration suppressing body according to the present invention. (A) is a front view, (b) is a bottom view, and FIG. 2 is a male screw fixing the vibration suppressing body. It is sectional drawing which shows a state.

  The illustrated male screw 1 is a male screw that fixes a cylindrical vibration suppression body 2 having a circular hole 21 therethrough to a support body 3 having a screw hole 31. The male screw 1 is connected to a screw portion 11 to be screwed into a screw hole 31, and a step portion 12 in the radial direction to the screw portion 11. The male screw 1 is thicker than the screw portion 11 and has an inner peripheral surface of the circular hole 21. The intermediate shaft portion 13 is in contact with a part of the intermediate shaft portion 13, and the intermediate shaft portion 13 is connected to the intermediate shaft portion 13 via the step portion 14. The head portion 15 is thicker than the intermediate shaft portion 13.

  The intermediate shaft portion 13 is formed in a truncated cone shape having a small diameter on the screw portion 11 side, and the large diameter side of the intermediate shaft portion 13 is in contact with the inner peripheral surface of the circular hole 21 so that the position where the vibration suppressing body 2 is fixed to the screw hole 31 is accurately determined. The small diameter side of the intermediate shaft portion 13 is a concave portion that does not contact the inner peripheral surface of the circular hole 21, and the contact area with the inner peripheral surface of the circular hole 21 of the intermediate shaft portion 13 is reduced. . Further, the intermediate shaft portion 13 is formed to be slightly shorter than the length between both ends of the vibration suppressing body 2, and is configured to be able to bend the vibration suppressing body 2 by the dimensional difference.

  The head portion 15 has a disk-shaped large-diameter portion having a stepped portion 14 and a small-diameter portion provided with a cross groove for rotational operation.

  The vibration suppressing body 2 is made of rubber, and a locking annular groove 22 is provided on the outer periphery of the intermediate portion between both ends.

  FIG. 3 is a perspective view showing the configuration of a fan that generates vibration, and FIG. 4 is an exploded perspective view showing the configuration of the fan. The vibration suppression body 2 fixed by the male screw 1 configured as described above has, for example, a substantially U shape, and a device such as a fan having a locking piece 41 locked in the annular groove 22 of the vibration suppression body 2. 4 can be attached to and detached from the locking piece 41. This attachment can be performed by fitting the locking piece 41 into the annular groove 22 of the vibration suppressing body 2.

  When the vibration suppression body 2 attached to the device 4 is fixed to the support body 3 having the screw hole 31, the vibration suppression body 2 is placed around the screw hole 31 of the support body 3 and the screw portion 11 of the male screw 1. Is inserted into the circular hole 21 of the vibration suppressing body 2, the intermediate shaft portion 13 is inserted into the circular hole 21, a tool such as a screwdriver is engaged with the cross groove of the head 15, and the screw portion 11 is inserted into the screw hole 31. By tightening, the vibration suppressing body 2 can be slightly bent and fixed to the support body 3. At this time, only the large diameter side of the intermediate shaft portion 13 is in contact with the inner peripheral surface of the circular hole 21, and the small diameter side of the intermediate shaft portion 13 is not in contact with the inner peripheral surface of the circular hole 21. The contact area with the suppressor 2 can be reduced, and the contact resistance with the inner peripheral surface of the circular hole 21 can be reduced. Therefore, when the male screw 1 is tightened, it is possible to suppress the vibration suppressing body 2 from rotating together, and it is possible to eliminate friction of the vibration suppressing body 2 due to the common rotation. Further, since the large diameter side of the intermediate shaft portion 13 is in contact with the inner peripheral surface of the circular hole 21, it is possible to eliminate the play of the vibration suppressing body 2 with respect to the intermediate shaft portion 13, and the vibration suppressing body with respect to the screw hole 31. The fixed position of 2 and thus the support position of the device 4 can be determined accurately, and the device 4 can be supported at the correct position.

  The structure for fixing the vibration suppression body 2 configured as described above is used for a display device such as a liquid crystal television. FIG. 5 is a vertical side view showing the configuration of the display device, and FIG. 6 is a rear view with a part omitted showing the configuration of the display device. This display device has a display surface 61a for displaying a television image on the front side, a display unit 61 that forms a substantially rectangular parallelepiped, and a cabinet 62 that forms a deep dish that covers the periphery and rear side of the display unit 61, An exhaust fan 63 that is disposed in the cabinet 62 and exhausts heat generated by the display unit 61 to the outside, and a rubber vibration suppression body 2 that is attached to the exhaust fan 63 and suppresses vibration of the exhaust fan 63. A thin liquid crystal television including a male screw 1 for attaching the vibration suppressing body 2 to the rear surface of the display unit 61, in other words, a thin display device. The exhaust fan 63 constitutes the device 4.

  The display unit 61 includes a panel 64 having a display surface 61a on the front side and a substantially rectangular parallelepiped shape, an optical sheet 65 such as a diffusion plate disposed on the rear side of the panel 64, and a rear side of the optical sheet 65. A backlight unit 66 having a plurality of lamps 66a, a substrate 67 such as a circuit board disposed on the rear side of the backlight unit 66 and mounted with a plurality of electronic components, and an exhaust fan 63 are provided. The substrate 67 and the exhaust fan 63 are supported by the plate-like support 3.

  The backlight unit 66 includes a chassis 66b made of a metal plate having a box shape with an open front side, and a plurality of lamps 66a that are housed and supported in the chassis 66b so as to be separated from each other in the vertical direction. A support 3 is attached to the rear surface.

  The cabinet 62 includes a frame portion 62a that covers the peripheral portion of the display portion 61, and a lid plate portion 62b that has a deep dish shape and covers the rear side of the display portion 61. The frame portion 62a and the cover plate The part 62b is attached to the chassis 66b with a plurality of screws. The lower part of the cover plate part 62b has an air inlet 62c for sucking outside air into the cabinet 62, and the upper part has an air outlet 62d for exhausting air inside the cabinet 62 to the outside.

  The exhaust fan 63 has an impeller 63a, a motor that drives the impeller 63a, a casing 63b that supports the motor and covers the periphery of the impeller 63a, and a plurality of locking pieces, and holds the casing 63b. The vibration suppressing body 2 is attached to the locking piece of the holding body.

  In the display device configured as described above, the plurality of vibration suppression bodies 2 attached to the locking pieces of the exhaust fan 63 are placed at predetermined positions on the support plate 3, and the circular holes 21 of the respective vibration suppression bodies 2. By inserting the male screw 1 and tightening the screw portion 11 into the screw hole 31, the vibration suppressing body 2 can be slightly bent and fixed to the support body 3. At this time, only the large diameter side of the intermediate shaft portion 13 is in contact with the inner peripheral surface of the circular hole 21, and the small diameter side of the intermediate shaft portion 13 is not in contact with the inner peripheral surface of the circular hole 21. The contact area with the suppressor 2 can be reduced, and the contact resistance with the inner peripheral surface of the circular hole 21 can be reduced. Therefore, when the male screw 1 is tightened, it is possible to suppress the vibration suppressing body 2 from rotating together, and it is possible to eliminate friction of the vibration suppressing body 2 due to the common rotation. Further, since the large diameter side of the intermediate shaft portion 13 is in contact with the inner peripheral surface of the circular hole 21, it is possible to eliminate the play of the vibration suppressing body 2 with respect to the intermediate shaft portion 13, and the vibration suppressing body with respect to the screw hole 31. 2, and thus the support position of the exhaust fan 63 can be accurately determined, and the exhaust fan 63 can be supported at an accurate position. The support plate 3 on which the exhaust fan 63 is supported is attached to the rear surface of the chassis 66b by a small screw.

Embodiment 2
FIG. 7 shows another configuration of the male screw 1. FIG. 7A is a front view and FIG. 7B is a bottom view. In the male screw 1, the intermediate shaft portion 13 is formed in a prismatic shape having a hexagonal cross section for reducing the contact area with the inner peripheral surface of the circular hole 21.

The intermediate shaft portion 13 is configured so that the prismatic corner portion comes into contact with the inner peripheral surface of the circular hole 21 so that the fixing position of the vibration suppressing body 2 with respect to the screw hole 31 can be accurately determined. The surface portion is a concave portion that does not contact the inner peripheral surface of the circular hole 21, and the contact area between the intermediate shaft portion 13 and the inner peripheral surface of the circular hole 21 is reduced.
Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof and description of operations and effects are omitted.

Embodiment 3
8 to 15 show other configurations of the male screw 1. FIG. 8A is a front view and FIG. 8B is a bottom view. In the male screw 1 of FIG. 8, the intermediate shaft portion 13 has a truncated cone shape as in the first embodiment (FIG. 1), and the corners of the step portion 12 are chamfered. The male screw 1 of FIG. 9 is provided with an annular recess 13 a in the middle of the intermediate shaft portion 13 in the longitudinal direction for reducing the contact area with the inner peripheral surface of the circular hole 21. The male screw 1 of FIG. 10 is provided with a plurality of annular recesses 13 b on the outer periphery of the intermediate shaft portion 13 that are spaced apart in the longitudinal direction to reduce the contact area with the inner peripheral surface of the circular hole 21. The male screw 1 of FIG. 11 is provided with a helical recess 13 c on the outer periphery of the intermediate shaft portion 13 for reducing the contact area with the inner peripheral surface of the circular hole 21. The male screw 1 of FIG. 12 is provided with a plurality of quadrangular pyramid convex portions 13d on the outer periphery of the intermediate shaft portion 13 so that the contact area with the inner peripheral surface of the circular hole 21 is reduced around the apex of each convex portion 13d. As a recess. The male screw 1 of FIG. 13 is provided with a plurality of recesses 13e formed of V-grooves in the circumferential direction so as to reduce the contact area with the inner peripheral surface of the circular hole 21 on the outer periphery of the intermediate shaft portion 13. The male screw 1 of FIG. 14 is provided with a plurality of torsional recesses 13f formed of V-grooves in the circumferential direction so as to reduce the contact area with the inner peripheral surface of the circular hole 21 on the outer periphery of the intermediate shaft portion 13. . In the male screw 1 of FIG. 15, the intermediate shaft portion 13 has a rectangular column shape with a hexagonal cross section for reducing the contact area with the inner peripheral surface of the circular hole 21, and each corner has a curved surface.
Since other configurations and operations are the same as those in the first and second embodiments, the same components are denoted by the same reference numerals, and the detailed description and description of the operations and effects are omitted.

  16-19 is explanatory drawing which shows the example of the apparatus which a vibration suppression body suppresses a vibration. In the embodiment described above, the configuration in which the male screw 1 fixes the vibration suppressing body 2 that suppresses the vibration of the exhaust fan 63 has been described. However, as shown in FIGS. 16 and 17, car navigation, car stereo, personal The male screw 1 fixes a vibration suppressing body 2 that suppresses vibration of a device 4 that generates vibration or receives vibration such as a computer, a thin-screen television, a DVD recorder, an HDD included in a stereo, or a CD / DVD drive. Further, as shown in FIG. 18, the male screw 1 may fix the vibration suppressing body 2 that suppresses the vibration of a display panel such as a liquid crystal television, a car navigation system, or a car stereo. 19, the male screw 1 may be configured to fix the vibration suppressing body 2 that suppresses the vibration of the speaker box. In addition, the apparatus 4 shown in FIGS. 16-19 is provided with the some securing piece 41 which makes the substantially U shape latched by the annular groove 22 of the vibration suppression body 2. As shown in FIG. Moreover, although the apparatus 4 of FIG. 16 is provided with the plate-shaped member which has the locking piece 41, the apparatus 4 of FIG. 16 does not have the said plate-shaped member.

The structure of the male screw for vibration suppression body fixation which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. It is sectional drawing which shows the state which the male screw which concerns on this invention has fixing the vibration suppression body. It is a perspective view which shows the structure of the fan which generate | occur | produces a vibration. It is a disassembled perspective view which shows the structure of a fan. It is a vertical side view which shows the structure of the display apparatus which concerns on this invention. It is the rear view which abbreviate | omitted one part which shows the structure of the display apparatus which concerns on this invention. The other structure of the male screw which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. The other structure of the male screw which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. The other structure of the male screw which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. The other structure of the male screw which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. The other structure of the male screw which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. The other structure of the male screw which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. The other structure of the male screw which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. The other structure of the male screw which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. The other structure of the male screw which concerns on this invention is shown, (a) is a front view, (b) is a bottom view. It is explanatory drawing which shows the example of the apparatus which a vibration suppression body suppresses a vibration. It is explanatory drawing which shows the example of the apparatus which a vibration suppression body suppresses a vibration. It is explanatory drawing which shows the example of the apparatus which a vibration suppression body suppresses a vibration. It is explanatory drawing which shows the example of the apparatus which a vibration suppression body suppresses a vibration. It is a perspective view which shows the structure of the conventional male screw for vibration suppression body fixation. It is sectional drawing which shows the fixation structure of the conventional vibration suppression body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Male screw 11 Screw part 13 Intermediate shaft part 15 Head 2 Vibration suppression body 21 Circular hole 3 Support body 31 Screw hole 61 Display part 62 Cabinet 63 Exhaust fan

Claims (4)

  In a male screw for fixing a vibration suppressing body having a circular hole penetrating to a support having a screw hole, a screw part screwed into the screw hole, connected to the screw part, thicker than the screw part, and An intermediate shaft portion that is in contact with the inner peripheral surface of the circular hole, and a head portion that is connected to the intermediate shaft portion and is thicker than the intermediate shaft portion, and an inner peripheral surface of the circular hole on the outer periphery of the intermediate shaft portion A male screw for fixing a vibration suppressing body, wherein a concave portion for reducing the contact area is provided.   The male screw for fixing a vibration suppressing body according to claim 1, wherein the intermediate shaft portion is formed in a truncated cone shape having a small diameter on the screw portion side.   The male screw for fixing a vibration suppressing body according to claim 1, wherein the intermediate shaft portion is formed in a prismatic shape. A display unit having a display surface on the front side, a cabinet that covers the rear side of the display unit, an exhaust fan disposed in the cabinet, a vibration suppressor that suppresses vibration of the exhaust fan, and the vibration suppressor A display device comprising: the male screw according to any one of claims 1 to 3, wherein the male screw is fixed to the display unit.

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