JP7465178B2 - Stands and display devices - Google Patents

Description

The present invention relates to a stand and a display device.

Patent document 1 describes an image display device that includes a display unit, a stand that supports the entire device, and a support leg that supports the display unit so that it can rotate freely relative to the stand.

JP 2007-267260 A

In the image display device described in Patent Document 1, the display unit is rotatably supported by the support legs, regardless of the size of the display unit. If the size, i.e., the weight, of the display unit is relatively large, there is a possibility that the image display device may fall over due to vibrations that occur when the display unit is rotated by the support legs or when the rotation stops.

The main objective of this disclosure is to provide a stand and a display device that can regulate the rotation of the display unit according to the weight of the display unit.

A stand according to one embodiment is a stand that supports a display unit, the stand comprising a base unit and a swivel unit that rotatably supports the display unit relative to the base unit, the swivel unit comprising a first rotating unit that is rotatable relative to the base unit around an axis along the vertical direction, a second rotating unit that is fixed to the display unit and is disposed above the first rotating unit and rotates integrally with the first rotating unit, a rotating shaft unit that rotates integrally with the first rotating unit around the axis and is movable in the vertical direction between a first position and a second position lower than the first position, and a regulating unit that is capable of regulating the rotation of the rotating shaft unit, the rotating shaft unit being configured to receive at least a portion of the weight of the display unit via the second rotating unit, and the regulating unit stopping the rotation of the rotating shaft unit when the rotating shaft unit is located at the second position.

A display device according to one embodiment includes a stand according to the above embodiment and a display unit that is instructed by the stand.

FIG. 1 is a perspective view of a television receiver according to an embodiment of the present invention. FIG. 2 is a perspective view of a stand provided in the television receiver. FIG. 3 is a cross-sectional view of a swivel portion of the stand. FIG. 4 is a cross-sectional view of the swivel portion. FIG. 5 is a perspective view showing a part of the swivel portion. FIG. 6 is an exploded perspective view of a first rotating portion and a rotating shaft portion of the swivel portion. FIG. 7 is a perspective view of a second rotating portion included in the swivel portion. FIG. 8 is a diagram for explaining the operation of the rotation shaft and the stopper provided in the swivel portion.

The following describes an example of a preferred embodiment of the present invention. However, the following embodiment is merely an example. The present invention is not limited to the following embodiment.

(Embodiment)
A television receiver 1, which is an example of a display device equipped with a stand according to the present disclosure, will be described with reference to FIGS. 1 to 8. FIG.

(Configuration of TV receiving device and stand)
FIG. 1 is a perspective view showing an example of a television receiving device 1. As shown in FIG. 1, the television receiving device 1 of the present embodiment is a stationary type television receiving device 1 that is placed on, for example, a television stand. As shown in FIG. 1, the television receiving device 1 is an example of a display device, and includes a display unit 2 and a stand 3. Although not shown, the television receiving device 1 also includes a receiving unit that receives broadcast waves via an antenna. In the following description, the longitudinal direction of the display unit 2 is defined as the left-right direction, the lateral direction of the display unit 2 is defined as the up-down direction, and the thickness direction of the display unit 2 is defined as the front-rear direction (see FIG. 1). However, these directions are defined for the convenience of explanation, and are not intended to limit the directions during use.

The display unit 2 is, for example, a liquid crystal display, and is formed in a rectangular plate shape. The display unit 2 has a liquid crystal panel that displays images, with the front surface serving as the display surface.

Figure 2 is a perspective view showing an example of the stand 3. The stand 3 supports the display unit 2. The stand 3 is installed, for example, on a television stand, and supports the display unit 2 at a position away from the television stand. As shown in Figure 2, the stand 3 includes a base portion 4 and a swivel portion 5.

The base 4 is formed in a plate shape with its thickness direction extending vertically. When the television receiver 1 is placed on a television stand, the base 4 faces the top surface of the television stand.

(Overview of the swivel section)
3 and 4 are schematic diagrams showing a cross section of the swivel unit 5 shown in FIG. 2. FIG. 3 and FIG. 4 are schematic diagrams showing a cross section of the stand 3 in a plane passing through the center position in the left-right direction and parallel to the up-down direction and the front-rear direction. FIG. 5 is a perspective view showing each part of the swivel unit 5 excluding a support part 51 and a second rotating part 55 described later. Note that FIG. 3 shows the swivel unit 5 in an unlocked state in which a rotating shaft part 56 described later is rotatable. Also, FIG. 4 shows the swivel unit 5 in a locked state in which the rotating shaft part 56 is not rotatable. An overview of the swivel unit 5 will be described below.

The swivel unit 5 supports the display unit 2 relative to the base unit 4. The swivel unit 5 is configured to switch between a state in which the display unit 2 is rotatably supported and a state in which the display unit 2 is non-rotatably supported depending on the weight of the display unit 2.

As shown in Figures 3 and 4 or 5, the swivel section 5 includes a support section 51, a fixed plate 52, a bearing 53, a first rotating section 54, a second rotating section 55, a rotating shaft section 56, an additional section 57 (see Figure 5), a spacer 58, and a restricting section 59.

The first rotating unit 54 can rotate relative to the base unit 4 around axis C along the vertical direction. The second rotating unit 55 is fixed to the display unit 2, is disposed above the first rotating unit 54, and rotates integrally with the first rotating unit 54. The rotating shaft unit 56 rotates integrally with the first rotating unit 54 around axis C, and can move relative to the first rotating unit 54 in the vertical direction. The attachment unit 57 applies an upward force to the rotating shaft unit 56 (see FIG. 5). The regulating unit 59 can regulate the rotation of the rotating shaft unit 56.

The rotating shaft 56 is configured to bear at least a portion of the weight of the display unit 2 via the second rotating part 55. When the weight of the display unit 2 is equal to or greater than a predetermined value, the rotating shaft 56 is pushed downward by the second rotating part 55 and moves from the first position (see FIG. 3) to a second position (see FIG. 4) that is lower than the first position. On the other hand, when the weight of the display unit 2 is less than the predetermined value, the rotating shaft 56 maintains the first position (see FIG. 3).

The restricting portion 59 stops the rotation of the rotating shaft portion 56 when the rotating shaft portion 56 is located in the second position. That is, when the rotating shaft portion 56 is pushed down to the second position by the weight of the display portion 2, the rotation of the rotating shaft portion 56 is stopped. Therefore, according to the above configuration, the rotation of the first rotating portion 54 and the second rotating portion 55, which rotate integrally with the rotating shaft portion 56, can be stopped according to the size (weight) of the display portion 2. The configuration of the swivel portion 5 of this embodiment will be described in more detail below.

(Configuration of the swivel section)
The support pillar 51 is formed in a columnar shape extending in the up-down direction and is provided at the center in the left-right direction of the base 4 and at the rear end portion so as to protrude upward.

The fixed plate 52 is a plate-shaped member that is fixed to the upper end of the support 51. The fixed plate 52 has a through hole 521 formed in the center, and the rotating shaft 56 is inserted along the axis C.

The bearing 53 is provided on the upper part of the fixed plate 52. When viewed from above and below, the bearing 53 has a generally cylindrical outer shape. The rotating shaft portion 56 is inserted into the bearing 53 along the axis C.

The first rotating part 54 is disposed on the upper part of the fixed plate 52, sandwiching the bearing 53. This allows the first rotating part 54 to rotate around the axis C relative to the base part 4. The first rotating part 54 is a plate-shaped member and includes a recess 541 and an engagement hole 542.

The recess 541 is formed downward. In a plan view seen from the top to bottom, the recess 541 has a substantially circular shape centered on the axis C (see FIG. 6). The depth of the recess 541 is appropriately set according to the distance from the first position to the second position, the thickness of the spacer 58, and the like so that the rotating shaft portion 56 can move from the first position to the second position. By providing the recess 541, the head portion 562 of the rotating shaft portion 56, which will be described later, can be positioned within the recess 541. Therefore, the head portion 562 protruding upward from the recess 541 can prevent the rotating shaft portion 56 from being accidentally pushed downward. Note that the recess 541 does not have to be formed, and for example, the rotating shaft portion 56 may protrude upward from the upper surface of the first rotating portion 54.

Figure 6 is a perspective view showing the first rotating part 54 and the rotating shaft part 56. As shown in Figure 6, the engagement hole 542 is a hole that penetrates the bottom surface of the recess 541 in the vertical direction. The rotating shaft part 56 is inserted in the vertical direction into the engagement hole 542, and engages with the rotating shaft part 56. In Figure 6, the engagement hole 542 has an elliptical shape with a pair of straight line parts that are opposed to and parallel to each other when viewed in a plan view in the vertical direction.

Figure 7 is a perspective view showing the second rotating unit 55. The second rotating unit 55 has a convex portion 551 extending downward at a position overlapping with the axis C in the vertical direction, i.e., at a position overlapping with the rotating shaft portion 56. The second rotating unit 55 is located behind the display unit 2 and is fixed to the display unit 2 by a screw. The second rotating unit 55 is also disposed above the first rotating unit 54 via a spacer 58. The second rotating unit 55 is fixed to the first rotating unit 54 by a screw or the like (not shown). The second rotating unit 55 rotates integrally with the first rotating unit 54 around the axis C.

As shown in FIG. 6, the rotating shaft portion 56 is inserted from above into the engagement hole 542. The rotating shaft portion 56 is configured to be movable in the vertical direction relative to the first rotating portion 54 and to be able to engage with the engagement hole 542 so as to be able to rotate integrally with the first rotating portion 54 around the axis C. The rotating shaft portion 56 has an elliptical shape substantially similar to the engagement hole 542 of the first rotating portion 54 in a cross section perpendicular to the axis C. That is, the rotating shaft portion 56 has a pair of flat portions that are parallel to the vertical direction and the front-rear direction and face each other, as shown in FIG. 6. In this embodiment, the state in which the pair of flat portions of the rotating shaft portion 56 abuts against the pair of straight portions of the engagement hole 542 is referred to as the rotating shaft portion 56 engaging with the engagement hole 542. The rotating shaft portion 56 is configured to engage with the engagement hole 542 as described above. This allows the rotating shaft portion 56 to rotate integrally with the first rotating portion 54 and to be able to move relative to the first rotating portion 54 in the vertical direction with a simple configuration.

3 and 4, a flange portion 561 is attached to the rotating shaft portion 56. The flange portion 561 is attached to the rotating shaft portion 56 at a predetermined position in the vertical direction. The flange portion 561 is attached to the rotating shaft portion 56 so as to be rotatable around the axis C. The flange portion 561 is substantially circular when viewed from the vertical direction. The flange portion 561 is disposed in the first groove portion 511 of the support portion 51. The first groove portion 511 is formed in the support portion 51 so as to be aligned with the axis C. The flange portion 561 moves in the vertical direction along the inner wall of the first groove portion 511. As shown in FIG. 3, the rotating shaft portion 56 can move upward to a first position where the flange portion 561 contacts the upper end of the first groove portion 511 (the bottom portion of the first groove portion 511).

A head 562 is provided at the upper end of the rotating shaft 56. The head 562 is generally circular when viewed from the top-bottom direction and is larger than the engagement hole 542. As shown in FIG. 4, the rotating shaft 56 can move downward to a position (second position) where the lower end of the head 562 contacts the first rotating part 54.

The rotating shaft portion 56 has a hole portion 563 provided along the front-rear direction (a direction intersecting with the up-down direction). The hole portion 563 is formed so as to penetrate the rotating shaft portion 56 in the front-rear direction. When the rotating shaft portion 56 is located in the second position, the stopper 591 of the regulating portion 59 is inserted from the rear of the rotating shaft portion 56. In other words, the second position is a locked position in which the rotation of the rotating shaft portion 56 is stopped. In addition, any position above the second position (including the first position) is an unlocked position in which the rotating shaft portion 56 is rotatable.

The inner surface of the hole 563 has a tapered shape such that the hole diameter increases toward the rear. In other words, the inner surface of the hole 563 has a tapered shape such that the hole diameter increases toward the opening end 563B on the side where the stopper 591 of the restricting portion 59 of the hole 563 is inserted. In this embodiment, the inner surface of the hole 563 has an inclined surface 563A that slopes downward toward the opening end 563B (i.e., toward the rear).

As shown in FIG. 5, the additional part 57 is a coil spring. The swivel part 5 of this embodiment has two additional parts 57. The two additional parts 57 are arranged on both the left and right sides of the rotating shaft part 56. The additional parts 57 are arranged so that an elastic force acts in the vertical direction. The lower end of the additional part 57 is fixed to the flange part 561. The upper end of the additional part 57 is fixed to the fixed plate 52. The additional part 57 applies an upward elastic force to the rotating shaft part 56. Specifically, when the rotating shaft part 56 is in the second position, the additional part 57 is in a state of elastic deformation so as to extend in the vertical direction from the steady state. Therefore, when the rotating shaft part 56 is in the second position, the additional part 57 applies an upward elastic force to the rotating shaft part 56 via the flange part 561. In other words, when the rotating shaft part 56 is in the second position, the additional part 57 applies a force to the rotating shaft part 56 from the second position to the first position. As a result, for example, when the display unit 2 is removed from the swivel unit 5 and the downward force on the rotating shaft unit 56 is released, the elastic force of the attachment unit 57 can move the rotating shaft unit 56 from the second position to the first position. Also, when no downward force is applied to the rotating shaft unit 5 or the downward force is relatively weak, the elastic force of the attachment unit 57 can maintain the position of the rotating shaft unit 56 in the first position.

The spacer 58 is an elastic member disposed between the first rotating part 54 and the second rotating part 55. The spacer 58 is, for example, a hard foamed resin material, and is elastically deformed by at least a part of the weight of the display part 2 acting on the spacer 58 via the second rotating part 55. When the weight of the display part 2 exceeds a predetermined value, the spacer 58 is deformed in the vertical direction by the distance dimension from the first position to the second position. The second rotating part 55 moves downward due to the elastic deformation of the spacer 58. Accordingly, the rotating shaft part 56 is pressed downward by the convex part 551 of the second rotating part 55, and is pushed down from the first position to the second position. On the other hand, when the weight of the display part 2 is less than the predetermined value, the spacer 58 is deformed in the vertical direction by less than the distance dimension from the first position to the second position. Therefore, when the weight of the display part 2 is less than the predetermined value, the rotating shaft part 56 is not pushed down from the first position to the second position.

The regulating portion 59 includes a stopper 591 and a spring 592. When the rotating shaft portion 56 is located at the second position, the stopper 591 is inserted into the hole portion 563 of the rotating shaft portion 56. As shown in Figs. 3 and 4, the stopper 591 is a columnar member extending in the front-rear direction, and is arranged on the support portion 51 so as to be movable in the front-rear direction. The stopper 591 is also arranged at a position overlapping in the front-rear direction with the hole portion 563 of the rotating shaft portion 56 when the rotating shaft portion 56 is located at the second position.

The spring 592 is an example of a second additional part, and applies a forward force to the stopper 591. The stopper 591 and the spring 592 are disposed in a second groove 512 provided in the support 51. The second groove 512 is formed along the front-rear direction in the support 51. The spring 592 is disposed behind the stopper 591 in the second groove 512. The spring 592 applies a forward elastic force to the stopper 591. When the rotating shaft 56 is in the first position, the stopper 591 is not inserted into the hole 563 because the vertical positions of the hole 563 of the rotating shaft 56 and the stopper 591 are misaligned. On the other hand, when the rotating shaft 56 is in the second position, the vertical positions of the hole 563 of the rotating shaft 56 and the stopper 591 match, so the stopper 591 moves forward due to the elastic force of the spring 592 and is inserted into the hole 563 (see FIG. 4). That is, when the rotating shaft 56 is moved to the second position by the spring 592, the stopper 591 can be inserted into the hole 563.

(Stand 3 Operation)
The stand 3 configured as described above can switch between a locked state in which the rotating shaft 56 cannot rotate and an unlocked state in which the rotating shaft 56 can rotate, depending on the weight of the display unit 2. That is, when the display unit 2 is relatively large and exceeds a predetermined weight, the rotating shaft 56 is pressed downward by the convex portion 551 of the second rotating portion 55 as shown in Fig. 4, and is pushed down from the first position to the second position (locked position). When the rotating shaft 56 is pushed down to the second position, the stopper 591 is inserted into the hole portion 563. This causes the rotating shaft 56 to enter a locked state.

On the other hand, when the weight of the display unit 2 is equal to or less than a predetermined weight, the elastic force of the spacer 58 and the upward force of the additional part 57 prevent the rotation shaft part 56 from being pushed down to the second position, and the rotation shaft part 56 remains in an unlocked state (see FIG. 3). By providing the spacer 58, a spring with a smaller spring constant can be used as the additional part 57 compared to a case in which the spacer 58 is not provided. For example, the additional part 57 only needs to be able to apply the force required to position the rotation shaft part 56 above the second position when no force corresponding to the weight of the display unit 2 is being applied thereto.

The inner surface of the hole 563 has an inclined surface 563A that inclines toward the rear. Therefore, even if the rotating shaft 56 is pushed down to the second position and becomes in a locked state, the rotating shaft 56 can be returned from the locked state to the unlocked state by removing the second rotating part 55 and removing the weight of the display part that was applied to the rotating shaft 56. FIG. 8 is a diagram that shows the state in which the rotating shaft 56 changes from the locked state to the unlocked state. As shown in FIG. 8, when the second rotating part 55 is removed, the rotating shaft 56 is pushed up by receiving an upward force from the additional part 57. At the same time, the stopper 591 is pushed down backward by receiving a force toward the rear from the inclined surface 563A. In this way, the stopper 591 is pushed out of the hole 563 and returns from the locked state to the unlocked state.

(Modification)
Modifications of the stand 3 and the television receiver according to the above embodiment will be described below. The modifications described below can be applied in appropriate combination with the above embodiment.

Although the configuration in which the inner surface of the hole 563 has a tapered shape has been exemplified, this is not limiting. The inner surface of the hole may be configured to have an inclined surface that slopes downward toward the restricting portion 59 and can abut against the stopper 591 from below. For example, only the lower side of the inner surface of the hole may be an inclined surface that slopes toward the restricting portion 59. The hole may be formed to slope toward the restricting portion 59, and the hole diameter of the hole may be constant. Note that the inner surface of the hole 563 does not have to have an inclined surface 563A.

In order to allow the rotating shaft portion 56 to rotate integrally with the first rotating portion 54, the shape of the engagement hole 542 and the cross-sectional shape of the rotating shaft portion 56 are configured to be approximately the same as an oval shape, but this is not limited to this. For example, the shape of the engagement hole 542 and the cross-sectional shape of the rotating shaft portion 56 may be various polygonal shapes such as a rectangle. The inner surface of the engagement hole and the rotating shaft portion come into contact with each other on multiple sides, allowing the rotating shaft portion 56 to rotate integrally with the first rotating portion 54.

Although a pair of springs arranged on the left and right sides of the rotating shaft portion 56 has been exemplified as the additional portion 57, the number of springs and their arrangement positions are not limited to the above example. For example, three or more springs may be arranged around the rotating shaft portion 56. Also, for example, a spring may be arranged between the bottom surface of the recess 541 and the head portion 562 of the rotating shaft portion 56 so as to be wound around the rotating shaft portion 56. Also, a configuration other than a spring may be adopted, for example, by using a magnetic force to apply an upward force to the rotating shaft portion 56. Also, the additional portion 57 may not be provided.

In the above embodiment, a spacer (elastic member) was provided, but a spacer need not be provided. In this case, when the rotating shaft 56 is pushed down to the second position against the upward force from the additional part 57, the rotating shaft 56 is locked. Note that the additional part 57 is configured to be able to apply an upward force to the rotating shaft 56 that can maintain the rotating shaft 56 in an unlocked position above the second position when the weight of the display part 2 is equal to or less than a predetermined weight.

The restricting unit is configured to use a spring to push the stopper into the hole of the rotating shaft that is pressed down to the second position, but is not limited to this. For example, the restricting unit may be configured to include a detection means that detects that the rotating shaft is in the second position, and a drive means that includes a motor, rails, etc., and drives the stopper in the forward and backward directions, and to be able to insert the stopper into the hole based on the detection result.

REFERENCE SIGNS LIST 1 Television receiver 2 Display unit 3 Stand 4 Base unit 5 Swivel unit 51 Support unit 52 Fixed plate 53 Bearing 54 First rotating unit 55 Second rotating unit 56 Rotating shaft unit 57 Addition unit 58 Spacer 59 Regulating unit 511 First groove unit 512 Second groove unit 521 Through hole 541 Recess unit 542 Engagement hole 551 Convex unit 561 Flange unit 562 Head unit 563 Hole unit 563A Inclined surface 563B Opening end 591 Stopper 592 Spring C Shaft

Claims (9)

A stand for supporting a display unit,
the stand includes a base portion and a swivel portion that rotatably supports the display portion relative to the base portion,
The swivel portion is
A first rotating portion that is rotatable with respect to the base portion around an axis along a vertical direction;
a second rotating unit that is fixed to the display unit, that is disposed above the first rotating unit, and that rotates integrally with the first rotating unit;
a rotating shaft portion that rotates integrally with the first rotating portion around the axis and is movable in a vertical direction between a first position and a second position that is lower than the first position;
A restricting portion that restricts the rotation of the rotating shaft portion,
the rotating shaft portion is configured to receive at least a part of the weight of the display portion via the second rotating portion,
The restriction portion stops rotation of the rotating shaft portion when the rotating shaft portion is located at the second position.
stand. and an application unit configured to apply a force to the rotating shaft portion toward the first position when the rotating shaft portion is located at the second position.
2. The stand of claim 1. The rotating shaft portion has a hole portion provided along a cross direction that crosses the up-down direction,
the restricting portion has a stopper that is inserted into the hole when the rotating shaft portion is located at the second position.
3. A stand according to claim 1 or 2. The restricting portion has a second applying portion that applies a force to the stopper along the intersecting direction toward the rotating shaft portion.
4. A stand as claimed in claim 3. the inner surface of the hole has an inclined surface that is inclined downward toward an opening end of the hole on the side into which the stopper is inserted;
5. A stand as claimed in claim 4. The first rotating portion includes an engagement hole through which the rotating shaft portion is inserted in the up-down direction,
The rotating shaft portion is configured to be movable relative to the first rotating portion in the up-down direction, and to be engaged with the engaging hole so as to be rotatable integrally with the first rotating portion about the axis.
A stand according to any one of claims 1 to 5. Further comprising an elastic member disposed between the first rotating portion and the second rotating portion,
The elastic member supports at least a part of the weight of the display unit via the second rotating portion.
A stand according to any one of claims 1 to 6. When the display unit has a predetermined weight or more, the elastic member has a deformation amount in the vertical direction that is at least a distance dimension from the first position to the second position.
8. A stand as claimed in claim 7. A stand according to any one of claims 1 to 8;
A display unit supported by the stand.
Display device.

Images