JP5497526B2 - Bearing structure - Google Patents

Description

  The present invention relates to a bearing structure.

  Conventionally, there has been a problem that, for example, static electricity generated in an in-vehicle liquid crystal display device causes flickering at the corners of the liquid crystal screen of the liquid crystal display device.

  Therefore, as a bearing structure for pivotally supporting the liquid crystal display device with respect to the arm, the first bearing portion formed on the housing of the liquid crystal display device and the second bearing portion formed on the arm are opposed to each other. The second metal part arranged on the second bearing part is brought into contact with the first metal part arranged on the first bearing part by the elastic force of the spring having an elastic force in the axial direction. Thus, there is one in which conduction between the liquid crystal display device and the arm is achieved even when the liquid crystal display device is rotated (see, for example, Patent Document 1).

  In the above bearing structure, the first metal part is in contact with the conductive part of the first bearing part, and the second metal part is in contact with the conductive part of the second bearing part.

  Then, electric charges generated by static electricity or the like in the liquid crystal display device are discharged out of the liquid crystal display device through the path of the liquid crystal display device → first metal component → second metal component → arm.

Japanese Patent Application Laid-Open No. 11-68901

  However, in the bearing structure in the above conventional example, a spring is provided to keep the first and second metal parts conductive, so that a space for providing the spring is required and the number of parts increases. The bearing structure was enlarged and complicated.

  The present invention has been made in view of the above-described reasons, and an object of the present invention is to achieve a small size capable of pivoting a liquid crystal display device with respect to an arm so that the liquid crystal display device can be connected to the arm. Another object is to provide a simple bearing structure.

  In order to solve the above problems, a bearing structure of the present invention includes an annular bushing inserted into a rotation hole formed in an arm made of a conductive material, and a liquid crystal display that is inserted through the bushing and the rotation hole. In a bearing structure in which a liquid crystal display device is pivotally supported with respect to an arm using a support shaft that is in contact with a connection portion formed in a housing of the device, the support shaft is formed of a conductive material. The abutting portion contacts a connecting portion formed in a portion of the casing of the liquid crystal display device that faces the rotating hole, and the bushing is inserted into the rotating hole formed in the arm and the support. An insertion member made of an insulating material that is inserted through the shaft, a first contact piece that is attached to the insertion member and contacts an inner diameter portion of a rotation hole formed in the arm, and an outer peripheral surface of the support shaft Conductive material made of a conductive material having a second abutting piece that abuts Characterized in that it is composed of a wood.

  In this bearing structure, the connecting portion includes a bulging portion formed by bulging from the surface of the housing, and an insertion hole formed from the top of the bulging portion toward the inside of the housing to receive the support shaft. It is preferable that it is comprised.

  Further, in this bearing structure, the bushing has a flange portion formed at one end of the insertion member, and the length from the flange portion to the other end of the insertion member is a portion where the rotation hole of the arm is formed. It is preferable to be formed shorter than the thickness.

  Further, in this bearing structure, the support shaft is formed so as to face an attachment portion attached to the connection portion, a fitting insertion portion fitted into the inner diameter portion of the bushing, and a flange portion of the bushing insertion member. It is preferable to include a heel contact portion that presses the heel portion.

  Further, in this bearing structure, it is preferable that the first contact piece is formed with a substantially dome-shaped protrusion that contacts the inner diameter portion of the rotation hole.

  In this bearing structure, it is preferable that the first contact piece is formed with a sharp portion that contacts the inner diameter portion of the rotation hole.

  In the present invention, there is an effect that a small and simple bearing structure can be provided in which the liquid crystal display device is pivotally supported with respect to the arm so that conduction between the liquid crystal display device and the arm can be achieved. .

The exploded perspective view of the bearing structure in Embodiment 1 of the present invention is shown. The operation state of the vehicle-mounted liquid crystal display device using the bearing structure is shown. The three views of the bushing used by the bearing structure in the same as above are shown. The perspective view of the electrically-conductive member which the bushing same as the above has is shown. The AA sectional view of the bearing structure in the same as above is shown. BB sectional drawing of the bearing structure in the same as the above is shown. The perspective view of the bushing which the bearing structure in Embodiment 2 of this invention has is shown. Sectional drawing of the bearing structure in the same as above is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the bearing structure in the present embodiment includes an annular bushing 2 inserted into a rotation hole 1a formed in an arm 1 made of a conductive material, the bushing 2 and the rotation hole 1a. The liquid crystal display device 3 is pivotally supported with respect to the arm 1 by using the support shaft 4 that is in contact with the connection portion 31 a formed in the housing 31 of the liquid crystal display device 3.

  Further, the bearing structure of the present embodiment is used, for example, when the in-vehicle liquid crystal display device 3 is pivotally supported on the arm 1. Here, when the liquid crystal display device 3 is not used, the liquid crystal display device 3 is pivotally supported in a state of being substantially parallel to the arm 1 as shown in FIG. It is stored with the arm 1 inside the main body. When the liquid crystal display device 3 is used, first, as shown in FIG. 2B, the arm 1 slides from the navigation body to the outside, and thereafter, as shown in FIG. The device 3 stands up to a position substantially perpendicular to the arm 1 and the arm 1 slides into the navigation body.

  Since the liquid crystal display device 3 may flicker at the corners of the liquid crystal portion when static electricity or the like occurs, the liquid crystal display portion 3 and the arm 1 are electrically connected via the bearing structure in the present embodiment. It has become a thing.

  Hereinafter, each component used in the bearing structure of the present embodiment will be described with reference to FIGS.

  First, as shown in FIG. 3, the bushing 2 includes an insertion member 21 made of an insulating material and a conduction member 22 made of a conductive material integrally formed with the insertion member 21. In addition, as a material of the conduction | electrical_connection member 22, stainless steel, phosphor bronze, beryllium steel, titanium steel etc. are used, for example.

  The insertion member 21 includes a substantially annular insertion portion 21a to be inserted into the rotation hole 1a formed in the arm 1, and one end of the insertion portion 21a. It is comprised from the collar part 21b which contact | abuts, and is penetrated by the spindle 4 with the said rotation hole 1a.

  As shown in FIG. 4, the conducting member 22 is formed in a substantially L-shape curved in the axial direction from a base portion 221 formed in a substantially annular shape and two opposing portions of the inner diameter portion of the base portion 221. A pair of first abutting pieces 222 including a first bending portion 222a and a first extending portion 222b extending in the axial direction from the tip of the first bending portion 222a; In the inner diameter portion of the base portion 221, the first curved portion 222a is formed in a substantially L-shape curved in the axial direction from each position rotated 90 degrees around the axis from each position where the pair of first curved portions 222a is formed. The second bent portion 223a and the second extended portion 223b extending inward from each other in the axial direction from the distal ends of the second bent portion 223a and having the distal ends bent outward. It is comprised from a pair of 2nd contact piece 223.

  The base 221 has four protrusions 221a formed on the outer diameter portion, and the protrusions 221a are provided at substantially equal intervals. Thereby, the shift | offset | difference of the relative position with the insertion member 21 is prevented, without the conduction | electrical_connection member 22 integrally molded by the insertion member 21 shifting | deviating to a rotation direction.

  The first abutting piece 222 has a spring property by the first curved portion 222a, and a protruding portion 222c that bulges outward is formed on the distal end side of the outer surface of the first extending portion 222b. . Then, as shown in FIG. 5, when the bushing 2 is inserted into the rotation hole 1a of the arm 1, the first contact piece 222 is brought into pressure contact with the inner diameter portion of the rotation hole 1a and is conducted. At that time, the top of the protrusion 222c of the first contact piece 222 is in pressure contact with the inner diameter portion of the rotation hole 1a, so that the first contact piece 222 applies pressure to the rotation hole 1a. Can be set to a desired substantially constant value.

  Further, since the rotation hole 1 a of the arm 1 is fitted and inserted into the insertion member 21 of the bushing 2, the rotation hole 1 a is substantially omitted from the first contact piece 222 in the conductive member 22 formed integrally with the insertion member 21. Receive a certain contact resistance.

  Therefore, the electrical resistance due to the contact between the first contact piece 222 and the rotation hole 1a can be kept substantially constant. That is, the electrical resistance between the conducting member 22 and the arm 1 can be kept substantially constant.

  The second contact piece 223 has a spring property due to the second curved portion 223a, and the second extending portion 223b is reduced in width toward the tip. Then, as shown in FIG. 6, when the support shaft 4 passes through the bushing 2, the second contact piece 223 of the conducting member 22 in the bushing 2 contacts the outer periphery of the support shaft 4 and is conducted. Here, the second contact piece 223 can reduce the contact area with respect to the support shaft 4 because the narrow portion on the distal end side of the second extending portion 223b is in sliding contact with the support shaft 4.

  Further, when the liquid crystal display device 3 rotates with respect to the arm 1, the support shaft 4 fixed to the liquid crystal display device 3 slides on the inner diameter portion of the insertion member 21 in the bushing 2. A substantially constant contact resistance is received from the second contact piece 223 of the conducting member 22 formed integrally with the receiving member 21.

  Therefore, the electrical resistance due to the contact between the second contact piece 223 and the support shaft 4 can be kept substantially constant. That is, the electrical resistance between the conducting member 22 and the support shaft 4 can be kept substantially constant.

  Further, since the first contact piece 222 and the second contact piece 223 have a spring property, the bearing structure of the present embodiment is used as a bearing structure of an in-vehicle liquid crystal display device, for example. Even when vibration or impact during travel is applied to the bearing structure, the conduction state between the first contact piece 222 and the rotation hole 1a and the conduction state between the second contact piece 223 and the support shaft 4 are satisfied. Therefore, the conduction state between the conduction member 22 and the arm 1 and the conduction state between the conduction member 22 and the support shaft 4 can be maintained, and impact resistance and vibration resistance can be improved.

  The support shaft 4 is formed in a substantially long cylindrical shape, and a screw portion (attachment portion) 4a in which a screw groove is engraved is formed at one end, and a screw head 4b is formed at the other end. Further, a substantially cylindrical fitting insertion portion 4c is formed between the screw portion 4a and the screw head 4b.

  Here, the connection portion 31a in the housing 31 of the liquid crystal display device 3 is formed to bulge from the surface of the housing 31 and is screwed into the housing 31 from the top of the bulging portion 31a (insertion hole). ) 31b is drilled.

  The support shaft 4 is inserted into the rotation hole 1a and the bushing 2 of the arm 1 and is electrically connected to the casing 31 of the liquid crystal display device 3 when the screw portion 4a is screwed into the screw hole 31b. Further, the insertion portion 4 c of the support shaft 4 is inserted into the insertion member 21 and is slidably contacted with the second contact piece 223 of the conductive member 22 to be electrically connected to the conductive member 22. Here, since the fitting insertion portion 4 c is not subjected to threading or the like, the contact pressure acting between the fitting insertion portion 4 c and the second contact piece 223 is stable, and the casing 31 of the liquid crystal display device 3. The electric resistance between the arm 1 and the arm 1 can be further stabilized.

  Further, the seat surface (鍔 contact portion) of the screw head 4 b is in contact with the flange portion 21 b of the insertion member 21 in a state where the screw portion 4 a is screwed, so that the arm 31 is attached to the casing 31 of the liquid crystal display device 3. 1 is fixed.

  Therefore, in the bearing structure of the present embodiment, the casing 31 of the liquid crystal display device 3 and the support shaft 4 are electrically connected, the support shaft 4 and the conductive member 22 of the bushing 2 are electrically connected, and the conductive member 22 and the arm 1 are electrically connected. Is conducted.

  Therefore, the charge generated by the static electricity or the like in the liquid crystal display device 3 is from the liquid crystal display device 3 → the support shaft 4 → the conductive member 22 (second contact piece 223 → base portion 221 → first contact piece 222) → arm 1. And is discharged out of the liquid crystal display device 3.

  As described above, by using the bearing structure in the present embodiment, the liquid crystal display device 3 can be pivotally supported with respect to the arm 1, and the liquid crystal display device and the arm can be configured with a small and simple structure. Conduction can be achieved, and further, static electricity generated in the liquid crystal display device 3 can be discharged to the arm 1 side to prevent flickering generated at the corners of the liquid crystal display unit.

  Further, as described above, since the connection portion 31a of the housing 31 is formed so as to bulge from the housing 31, only the top of the connection portion 31a of the housing 31 is formed when the liquid crystal display device 3 rotates. Since the area in which the casing 31 slides on the arm 1 can be minimized by contacting the arm 1, the sliding frictional resistance of the casing 31 with respect to the arm 1 when the liquid crystal display device 3 is rotated is stabilized. Can be made.

  Further, when the liquid crystal display device 3 is rotated, only the top of the connection portion 31a slides with respect to the arm 1, so that the area where the casing 31 is in sliding contact with the arm 1 during the sliding is minimized. Therefore, the area of the scratch generated in the housing 31 is reduced, and the scratch can be made inconspicuous.

  Moreover, in the bearing structure of this embodiment, as shown in FIG. 5, the axial length dimension L1 of the insertion portion 21a of the insertion member 21 is the thickness of the portion where the rotation hole 1a of the arm 1 is formed. It is formed shorter than the dimension L2. In the following description, the vertical direction in FIG. 5 is used as a reference.

  When the screw portion 4a of the support shaft 4 is screwed into the screw hole 31b in the connection portion 31a of the housing 31, the screw head 4b of the support shaft 4 comes into contact with the upper surface of the flange portion 21b of the insertion member 21, and The lower surface of the portion 21 b comes into contact with the upper surface of the arm 1, and the lower surface of the arm 1 comes into contact with the connection portion 31 a of the casing 31 of the liquid crystal display device 3. Here, since the dimension L1 is set shorter than the dimension L2 (L1 <L2), the screw head 4b of the support shaft 4 is inserted as the screw portion 4a of the support shaft 4 is screwed. The pressure applied to the flange portion 21b of the wearing member 21 increases, and the contact pressure acting between the parts that are in contact with each other also increases.

  Therefore, the contact pressure acting between the arm 1 and the casing 31 of the liquid crystal display device 3 can be easily adjusted by adjusting the screwing amount of the screw portion 4 a in the support shaft 4. That is, by adjusting the screwing amount, the sliding frictional resistance of the housing 31 with respect to the arm 1 when the liquid crystal display device 3 is rotated can be easily adjusted.

(Embodiment 2)
The bearing structure of this embodiment will be described with reference to FIGS. The bearing structure of the present embodiment is different from the bearing structure of the first embodiment only in that a first contact piece 224 is formed instead of the first contact piece 222. Since the other configurations are the same as those in the first embodiment, the same reference numerals are used and the description thereof is omitted. As shown in FIG. A pair of curved portions 224a formed by bending in an approximately L shape toward the axial direction, a pair of extending portions 224b extending in the axial direction from the distal ends of the pair of curved portions 224a, and a pair of extensions It is comprised from the sharp part 224c formed between the installation parts 224b.

  The pair of curved pieces 224a are juxtaposed via a gap 224d.

  The extending portions 224b are extended downward from the distal ends of the pair of curved pieces 224a, respectively, and the proximal end side is wider than the distal end side. A widened portion 224e that is wider from the distal end side toward the proximal end side is formed on the proximal end side of the extending portion 224b.

  The sharp portion 224c is formed in a substantially V-shaped cross section with the tip portion 224f protruding outwardly between the pair of extended pieces 224b, and is formed integrally with the pair of extended pieces 224b. Here, the tip portion 224f of the sharp portion 224c is sharp.

And when the bushing 2 is inserted into the rotation hole 1a of the arm 1 as shown in FIG.
The tip 224f of the sharp part 224c slides on the inner diameter part of the rotation hole 1a. Here, for example, a plating layer is formed on the inner diameter portion of the rotation hole 1a when the surface of the arm 1 is plated. And since the front-end | tip part 224f of the sharp part 224c becomes a sharp shape, when the sharp part 224c slides on the internal diameter part of the rotation hole 1a, the plating layer currently formed in the said internal diameter part is It is scraped off by the sharp part 224c. As a result, the sharpened portion 224c reliably contacts the metal portion of the rotation hole 1a in the arm 1.

  Therefore, in the bearing structure of the present embodiment, even when the arm 1 is plated, the metal portion of the arm 1 and the first contact piece 224 are reliably in contact, and the arm 1 and the connection member 22 can be conducted more stably.

  Further, since the gap 224d is formed between the pair of curved portions 224a, the first contact piece 224 is easily biased in the inner direction (the direction away from the inner diameter portion of the rotation hole 1a). Therefore, when the liquid crystal display device 3 rotates, the frictional force acting between the first contact piece 224 and the arm 1 can be reduced, and the liquid crystal display device 3 can be smoothly rotated. it can.

  In this embodiment, the arm 1 is plated. However, even when the arm 1 is coated, the coating film formed in the rotating hole 1a can be removed by the sharp portion 224c. . As a result, similarly to the above, the metal portion of the arm 1 and the first contact piece 224 can reliably contact each other, and the arm 1 and the connection member 22 can be more stably conducted.

DESCRIPTION OF SYMBOLS 1 Arm 1a Rotating hole 2 Bushing 3 Liquid crystal display device 4 Support shaft 4a Screw part (attachment part)
4c Insertion part 21 Insertion member 21b Gutter part 22 Conductive member 31 Housing 31a Connection part 31b Screw hole (insertion hole)
222 1st contact piece 223 2nd contact piece

Claims (6)

An annular bushing inserted into a rotation hole formed in an arm made of a conductive material, and a support that is inserted through the bushing and the rotation hole and comes into contact with a connection portion formed in the casing of the liquid crystal display device. In a bearing structure that pivotally supports a liquid crystal display device with respect to an arm using a shaft,
The support shaft is formed of a conductive material, and abuts a connection portion formed at a position facing the rotation hole in the conductive portion of the liquid crystal display device housing,
The bushing is inserted into a rotation hole formed in the arm and is inserted into the support shaft, and is inserted into the support member. The bushing is attached to the insertion member and is formed in the arm. A bearing comprising: a first contact piece that contacts the inner diameter portion of the moving hole; and a conductive member made of a conductive material having a second contact piece that contacts the outer peripheral surface of the support shaft. Construction.   The connection portion is configured by a bulging portion formed by bulging from the surface of the housing, and an insertion hole formed from the top of the bulging portion toward the inside of the housing to insert the support shaft. The bearing structure according to claim 1.   The bushing is formed with a flange at one end of the insertion member, and the length from the flange to the other end of the insertion member is shorter than the thickness of the portion where the rotation hole of the arm is formed. The bearing structure according to claim 1 or 2, wherein   The support shaft is formed so as to be opposed to the attaching portion attached to the connecting portion, the fitting insertion portion to be inserted into the inner diameter portion of the bushing, and the flange portion of the insertion member of the bushing, and presses the flange portion. The bearing structure according to claim 3, further comprising a flange contact portion.   5. The bearing structure according to claim 1, wherein the first abutting piece is formed with a substantially dome-shaped protrusion that abuts against an inner diameter portion of the rotation hole. 5. The bearing structure according to claim 1, wherein the first abutting piece is formed with a sharp portion that abuts against an inner diameter portion of the rotation hole.

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