JP7012620B2 - Display device - Google Patents

Description

The present invention relates to a display device having a chassis and a rear cabinet attached to the rear side of the chassis.

In display devices such as flat-screen TVs, it is common to fix the rear cabinet to a chassis (a metal frame on which a circuit board or other electronic components are mounted) with screws. That is, a screw is fastened from the back side of the display device, and the rear cabinet is fixed to the chassis by this screw.

In recent years, the size of flat-screen TVs has been increasing, and along with this, the size of cabinets, which are the exteriors, has also increased. Therefore, when fixing the rear cabinet to the chassis or the like with screws, many screws are used due to problems in strength and warpage of the cabinet due to thermal expansion. However, in the conventional structure in which the screws are fastened from the back side of the display device, there is a problem that many screws are exposed on the back surface of the device and the aesthetic appearance of the device is spoiled.

On the other hand, Patent Document 1 discloses a structure for fixing the back cabinet without using screws. That is, the display device disclosed in Patent Document 1 has a configuration in which a strip-shaped edge plate provided on the peripheral frame portion of the rear cabinet is fitted into the peripheral frame portion of the front cabinet to fix the rear cabinet.

Japanese Unexamined Patent Publication No. 2011-109506

However, the conventional configuration disclosed in Patent Document 1 does not consider deformation due to thermal expansion of the member, and in fact, when a difference in thermal expansion occurs between the two cabinet members (front cabinet and rear cabinet). It is not a compatible configuration.

For example, if the method of fixing the cabinet in Patent Document 1 is applied when the rear cabinet (usually a resin member) is fixed to the chassis (usually a metal member), the cabinet may be warped or the member may be warped. There is also a risk of damage. This is because the difference in the amount of deformation due to thermal expansion (which may be 4 to 5 mm in a large display device) is large between the rear cabinet and the chassis made of different materials.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a display device that can reduce the number of screws exposed on the back surface of the device when the rear cabinet is fixed to the chassis and can also cope with thermal expansion. The purpose.

In order to solve the above problems, the present invention is a display device having a chassis and a rear cabinet attached to the back side of the chassis, the first member which is one of the chassis and the rear cabinet. , An engaging member having two engaging arms facing each other is attached, and the two engaging arms of the engaging member are attached to the second member which is the other of the chassis and the rear cabinet. An engaging protrusion is provided so as to be sandwiched between the portions, and the engaging member is attached so as to be slidable in the first direction with respect to the first member. The engaging projection portion engaged with the engaging arm portion of the mating member is characterized in that it can slide in a second direction orthogonal to the first direction with respect to the engaging arm portion. ..

According to the above configuration, the rear cabinet can be attached to the chassis and the rear cabinet can be fixed by engaging the engaging protrusion on the second member side with the engaging arm on the first member side. .. In this fixing method, the number of screws exposed on the back surface of the device can be significantly reduced as compared with the conventional fixing method of the rear cabinet in which the screws are fastened from the back side of the display device, and the aesthetic appearance of the device can be improved.

Further, since the engaging member can slide in the first direction with respect to the first member, the deformation due to thermal expansion in the first direction is absorbed by the engaging member sliding and moving with respect to the first member. can. Further, since the engaging protrusion is slidable in the second direction with respect to the engaging arm, the deformation due to thermal expansion in the second direction causes the engaging protrusion to slide and move with respect to the engaging member. It can be absorbed by. That is, the deformation due to thermal expansion can be absorbed by the sliding movement of the member in both the first direction and the second direction orthogonal to each other, and it is possible to prevent the rear cabinet from being warped due to thermal expansion.

Further, in the display device, at least one of the two engaging arm portions has a shape having a convex portion bulging toward the other engaging arm portion facing the other, and the engaging protrusion portion is the convex portion. It can be configured to have a recess that fits into the.

Further, in the display device, the engaging member has a first elongated hole along the first direction, and a boss provided in the first elongated hole is passed through the first elongated hole to pass the boss. It can be configured to be attached to the first member by a screw passed through the boss.

According to the above configuration, although the engaging member is attached to the first member by a screw, the engaging member is not completely fixed by fastening the screw, and the engaging member can be easily attached to the first member. It can be made slidable.

Further, in the display device, the engaging member has a second elongated hole along the first direction, and a guide protrusion provided on the first member is inserted into the second elongated hole. It can be configured to be attached to the first member.

According to the above configuration, by inserting the guide protrusion provided in the first member into the second elongated hole of the engaging member, the engaging member has the boss inserted into the first elongated hole and the second. Rotation is restricted by the guide protrusions inserted into the elongated holes. As a result, the engaging member can slide and move with respect to the first member without blurring.

Further, in the display device, the first member may be a chassis and the second member may be a rear cabinet.

According to the above configuration, by providing the engaging protrusion on the back cabinet side which is a resin member, the engaging protrusion can be integrally resin-molded with the back cabinet.

Further, in the display device, the first direction may be a direction along the short side of the rear cabinet.

According to the above configuration, the first direction in which the sliding range is limited to the length in the longitudinal direction of the first elongated hole is aligned with the short side direction of the rear cabinet in which the difference in the amount of deformation due to thermal expansion is smaller. Therefore, it is possible to prevent the engaging member from becoming larger than necessary.

In the display device of the present invention, when the rear cabinet is attached to and fixed to the chassis, the engaging protrusion on the second member (for example, the rear cabinet) side is engaged with the engaging arm on the first member (for example, the chassis) side. By combining them, the number of screws exposed on the back surface of the device can be significantly reduced, and the aesthetic appearance of the device can be improved. Further, since the engaging member is slidable in the first direction with respect to the first member and the engaging projection portion is slidable in the second direction with respect to the engaging arm portion, the first one orthogonal to each other. In both the direction and the second direction, the deformation due to thermal expansion can be absorbed by the sliding movement of the member, and the effect of preventing warping of the rear cabinet due to thermal expansion is achieved.

It is the figure which took out and described the chassis and the rear cabinet in the display apparatus which concerns on Embodiment 1, and is the exploded perspective view of the state which was seen from the chassis side. It is a perspective view which looked at the chassis of FIG. 1 from the back side. (A) is a perspective view of the hook member viewed from the upper surface side, and (b) is a perspective view of the hook member viewed from the lower surface side. It is a figure which shows the mounting structure of the hook member to a chassis, (a) is the top view, (b) is the AA sectional view of (a). It is a perspective view which looked at the rear cabinet of FIG. 1 from the front side. It is a perspective view which shows the engaging protrusion part. FIG. 5 is a side view showing an engaged state between one hook member and one engaging protrusion when the rear cabinet is attached to and fixed to the chassis in the display device according to the first embodiment. FIG. 3 is a side view showing an engaged state between one hook member and one engaging protrusion when the rear cabinet is attached to and fixed to the chassis in the display device according to the third embodiment.

[Embodiment 1]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The display device according to the present embodiment has a configuration including the chassis 100 and the rear cabinet 200 shown in FIG. 1, and is premised on a structure in which the rear cabinet 200 is fixed to the chassis 100. Note that FIG. 1 is an exploded perspective view showing the chassis 100 and the rear cabinet 200 of the display device extracted and described, and shows a state seen from the chassis 100 side (a state seen from the front side of the display device).

FIG. 2 is a perspective view of the chassis 100 as viewed from the rear side. A plurality of hook members (engagement members) 110 are attached to the back surface of the chassis 100 (the surface facing the rear cabinet 200). In the first embodiment, the chassis 100 corresponds to the first member (member to which the engaging member is attached) described in the claims. The hook member 110 can be attached to an arbitrary position on the back surface of the chassis 100 with a screw 120 (see FIG. 4), but the attachment position and the number of attachments of the hook member 110 are particularly limited in the present invention. is not it.

A specific configuration of the hook member 110 will be described with reference to FIG. 3A and 3B are a perspective view of the hook member 110 seen from the upper surface side, and FIG. 3B is a perspective view of the hook member 110 seen from the lower surface side. For convenience of explanation, the surface of the hook member 110 in contact with the chassis 100 is set as the lower surface.

As shown in FIG. 3, the hook member 110 generally has a base portion 111 and an engaging arm portion 112. The base portion 111 is a substantially rectangular plate-shaped member, and when the hook member 110 is attached to the chassis 100, the lower surface of the base portion 111 faces the chassis 100. The engaging arm portion 112 is erected so as to project vertically from the upper surface of the base portion 111, and in the hook member 110, the two engaging arm portions 112 are arranged side by side so as to face each other. Further, the arrangement direction of the two opposing arm portions 112 coincides with the longitudinal direction of the base portion 111.

Each of the engaging arm portions 112 has a shape having a mountain-shaped convex portion 112A bulging toward the other engaging arm portion 112 facing the other. That is, the distance between the two opposing arm portions 112 is narrowed so as to cause a constriction at the top portion of the convex portion 112A, and widens again toward the tip of the engaging arm portion 112 from this top portion.

The base portion 111 is formed with one mounting elongated hole (first elongated hole) 113 and two guide elongated holes (second elongated hole) 114. The mounting slot 113 is provided for mounting the hook member 110 to the chassis 100. Further, the mounting elongated hole 113 is provided between the two engaging arm portions 112, and is formed so as to coincide with the base portion 111 in the longitudinal direction. The long guide hole 114 serves as a guide when the hook member 110 slides with respect to the chassis 100, and is provided to eliminate blurring of the hook member 110. Further, the elongated guide hole 114 is provided on the outer side of each of the two engaging arm portions 112, and is formed so as to coincide with the base portion 111 in the longitudinal direction. Further, it is desirable that the mounting elongated hole 113 and the two guide elongated holes 114 have the same length in the longitudinal direction.

Further, a plurality of small protrusions 115 (six in FIG. 3) may be formed on the lower surface of the base portion 111. These small protrusions 115 reduce the contact area between the hook member 110 and the chassis 100, and make it easier for the hook member 110 to slide with respect to the chassis 100.

4A and 4B are views showing a structure for mounting the hook member 110 to the chassis 100, where FIG. 4A is a top view and FIG. 4B is a sectional view taken along the line AA of FIG. 4A. A boss 122 is provided at the mounting position of the hook member 110 in the chassis 100, and the boss 122 is inserted into the mounting slot 113 of the hook member 110 and the screw 120 is fastened from above. Further, it is desirable that a washer 121 is inserted between the screw 120 and the boss 122. The height of the boss 122 is set to be slightly larger than the thickness of the base portion 111 of the hook member 110. As a result, the hook member 110 is not completely fixed even by fastening the screw 120, and the mounting elongated hole 113 of the hook member 110 slides on the boss 122, so that the hook member 110 is attached to the chassis 100. It can be slidably attached.

Further, in the chassis 100, a guide protrusion 101 is also formed in close proximity to the boss 122 at the mounting position of the hook member 110 in the chassis 100. The guide protrusion 101 is inserted into the guide elongated hole 114 of the hook member 110. That is, the rotation of the hook member 110 is restricted by the boss 122 inserted into the mounting slot 113 and the guide protrusion 101 inserted into the guide slot 114, so that the hook member 110 does not shake with respect to the chassis 100. It becomes possible to slide and move.

In the configuration shown in FIG. 4, the number of guide protrusions 101 formed on the chassis 100 is one, while the number of guide elongated holes 114 formed on the hook member 110 is two. By forming two elongated guide holes 114 in this way, the hook member 110 becomes point-symmetrical when viewed from the upper surface, and when the hook member 110 is attached to the chassis 100, whichever is rotated 180 degrees when viewed from the upper surface. Since it can be mounted even in the orientation, the mounting workability of the hook member 110 is improved.

Next, FIG. 5 is a perspective view of the rear cabinet 200 as viewed from the front side. A plurality of engaging protrusions 210 are attached to the front surface of the rear cabinet 200 (the surface facing the chassis 100). In the first embodiment, the rear cabinet 200 corresponds to the second member (member provided with the engaging protrusion) described in the claims. The number of engaging protrusions 210 is provided in the same number as the number of hook members 110 in the chassis 100, and the forming portion thereof also faces the mounting position of the hook member 110 in the chassis 100. Further, the engaging protrusion 210 can be integrally resin-molded with the back cabinet 200.

FIG. 6 is a perspective view showing one engaging protrusion 210. The engaging protrusion 210 is composed of a base 211 and a head 212, and has a recess 213 near the boundary between the base 211 and the head 212. The concave portion 213 is a portion that fits into the convex portion 112A of the hook member 110. The base 211 is formed to stand upright from the rear cabinet 200, but its height need not be the same for all engaging projections 210. That is, in the rear cabinet 200, the surface on which the engaging protrusion 210 is formed is not always a constant flat surface, so that the distance between the facing surfaces of the rear cabinet 200 and the chassis 100 is the location where the engaging protrusion 210 is formed. Depends on. That is, the height of the base portion 211 is set according to the distance between the facing surfaces of the rear cabinet 200 and the chassis 100 at the formation points of the engaging protrusions 210.

FIG. 7 is a side view showing an engaged state between one hook member 110 and one engaging protrusion 210 when the rear cabinet 200 is attached to and fixed to the chassis 100. In the engagement between the hook member 110 and the engaging protrusion 210, the engaging protrusion 210 is sandwiched between the two engaging arm portions 112 of the hook member 110, and at this time, the engaging protrusion 210 has two positions. The concave portion 213 engages with each of the convex portions 112A of the engaging arm portion 112. The engaging state shown in FIG. 7 can be easily obtained by pressing the head 212 of the engaging protrusion 210 against the tips of the two engaging arm portions 112.

As described above, in the display device according to the present embodiment, the rear cabinet 200 is attached to the chassis 100 by engaging the engaging protrusion 210 provided on the rear cabinet 200 with the hook member 110 attached to the chassis 100. Can be attached and the rear cabinet 200 can be fixed. In this fixing method, the number of screws exposed on the back surface of the device can be significantly reduced as compared with the conventional fixing method of the rear cabinet in which the screws are fastened from the back side of the display device, and the aesthetic appearance of the device can be improved.

Further, the method of fixing the rear cabinet 200 according to the first embodiment can cope with the difference in the amount of deformation due to the thermal expansion of the chassis 100 and the rear cabinet 200. This point will be explained as follows.

First, the hook member 110 attached to the chassis 100 is not completely fixed to the chassis 100 as described above, but is slidable in the longitudinal direction of the hook member 110. That is, if the longitudinal direction of the hook member 110 is the first direction (A1 direction in FIG. 7), the deformation due to thermal expansion in the first direction is absorbed by the hook member 110 sliding and moving with respect to the chassis 100. can.

On the other hand, in the second direction (B1 direction in FIG. 7) orthogonal to the first direction, the engaging protrusion 210 engaged with the engaging arm 112 of the hook member 110 is attached to the engaging arm 112. On the other hand, it becomes slidable. That is, the deformation due to thermal expansion in the second direction can be absorbed by the engaging protrusion 210 sliding and moving with respect to the hook member 110.

As described above, the method of fixing the rear cabinet 200 according to the present embodiment can absorb the deformation due to thermal expansion by the sliding movement of the member in both the first direction and the second direction orthogonal to each other, and heat is generated. It is possible to prevent the rear cabinet 200 from being warped due to expansion.

Further, the method of fixing the rear cabinet 200 according to the first embodiment can significantly reduce the number of screws exposed on the back surface of the device (the number of screws used for fixing the rear cabinet 200 can be reduced), but the device. It is not limited to those that completely eliminate the screws exposed on the back surface. That is, the rear cabinet 200 does not need to be fixed only by engaging the hook member 110 with the engaging protrusion 210, and a screw (a screw fastened from the back side of the display device) may be used as an auxiliary. Since such a fixing method by fastening screws cannot cope with the difference in the amount of deformation due to thermal expansion, the rear cabinet 200 is not fixed to the chassis 100 with screws, but the rear cabinet 200 is attached to the front cabinet (shown in the figure). It is desirable to use it in a place where it can be fixed with screws. This is because the difference in thermal expansion rate can be reduced by using a resin member for both the rear cabinet 200 and the front cabinet.

Regarding the mounting direction of the hook member 110 to the chassis 100, it is desirable that the first direction (the sliding direction of the hook member 110 with respect to the chassis 100) is the direction along the short side of the rear cabinet 200. This is due to the following reasons.

First, the sliding range in the first direction is limited to the length in the longitudinal direction of the mounting slot 113, but if this range is increased, the hook member 110 that can be mounted within the limited mounting range The number decreases. Therefore, it is not preferable to increase the sliding range in the first direction more than necessary. On the other hand, the sliding range in the second direction can be easily increased by increasing the width of the engaging protrusion 210 in the second direction, for example. Therefore, the long side direction of the rear cabinet 200 in which the difference in the amount of deformation due to thermal expansion becomes larger is aligned with the second direction, and the short side direction of the rear cabinet 200 in which the difference in the amount of deformation due to thermal expansion becomes smaller is the first direction. It can be said that it is preferable to match with. In other words, by aligning the first direction, in which the sliding range is limited to the length of the mounting slot 113 in the longitudinal direction, with the short side direction of the rear cabinet 200 in which the difference in the amount of deformation due to thermal expansion becomes smaller. It is possible to prevent the hook member 110 from becoming larger than necessary in the longitudinal direction.

[Embodiment 2]
In the first embodiment, the chassis 100 is the first member to which the hook member 110 is attached, and the rear cabinet 200 is the second member to which the engaging protrusion 210 is provided. However, the present invention is not limited to this, and the first member to which the hook member 110 is attached may be the rear cabinet 200, and the second member to which the engaging protrusion 210 is provided may be the chassis 100. ..

However, in order to provide the engaging protrusion 210 integrally with the second member, the engaging protrusion 210 is provided on the back cabinet 200 side which is a resin member, and the engaging protrusion 210 is integrally provided with the rear cabinet 200. It is preferable to have a structure to be molded.

[Embodiment 3]
In the first embodiment, a configuration is exemplified in which a convex portion 112A is provided on each of the two engaging arm portions 112 of the hook member 110, and the engaging protrusion portion 210 is also provided with concave portions 213 at two locations corresponding to the convex portion 112A. .. However, the present invention is not limited to this, and as shown in FIG. 8, the convex portion 112A is provided only on one of the two engaging arm portions 112, and the engaging protrusion portion 210 also corresponds to this. The recess 213 may be provided only in one place.

The embodiments disclosed this time are exemplary in all respects and are not grounds for limited interpretation. Therefore, the technical scope of the present invention is not construed solely by the embodiments described above, but is defined based on the description of the scope of claims. It also includes all changes within the meaning and scope of the claims.

100 Chassis 101 Guide protrusion 110 Hook member (engagement member)
111 Base part 112 Engagement arm part 112A Convex part 113 Mounting slot (first slot)
114 Guide long hole (second long hole)
115 Small protrusion 120 Screw 121 Washer 122 Boss 200 Back cabinet 210 Engagement protrusion 211 Base 212 Head 213 Recess

Claims (6)

A display device having a chassis and a rear cabinet attached to the rear side of the chassis.
An engaging member having two engaging arms facing each other is attached to the first member, which is one of the chassis and the rear cabinet.
The second member, which is the other side of the chassis and the rear cabinet, is provided with an engaging protrusion that engages so as to be sandwiched between the two engaging arms of the engaging member.
The engaging member is attached so as to be slidable in the first direction with respect to the first member.
The engaging protrusion portion engaged with the engaging arm portion of the engaging member is slidable in a second direction orthogonal to the first direction with respect to the engaging arm portion. Display device. The display device according to claim 1.
At least one of the two engaging arms has a shape having a convex portion bulging toward the other engaging arm that faces the other.
The display device is characterized in that the engaging protrusion has a shape having a concave portion that fits into the convex portion. The display device according to claim 1 or 2.
The engaging member has a first elongated hole along the first direction, and a boss provided in the first member is passed through the first elongated hole, and a screw passed through the boss is used. A display device characterized in that it is attached to the first member. The display device according to claim 3.
The engaging member has a second elongated hole along the first direction, and a guide protrusion provided on the first member is inserted into the second elongated hole and attached to the first member. A display device characterized by being The display device according to any one of claims 1 to 4.
The display device, wherein the first member is a chassis and the second member is a rear cabinet. The display device according to any one of claims 1 to 5.
The first direction is a display device along the short side of the rear cabinet.

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